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Videos / Pictures => Fixed Wing FPV Videos => Topic started by: omegooliebird on August 29, 2019, 01:30:38 AM

Title: 220mph Proximity
Post by: omegooliebird on August 29, 2019, 01:30:38 AM
It's the modified VASA Fusion...the Omegooliebird....my desert island plane...the most exciting plane in the hangar..


Title: Re: 220mph Proximity
Post by: urbanfpv on August 29, 2019, 09:37:36 AM
Love it.   :thumbsup: What Lipos are you using?
Title: Re: 220mph Proximity
Post by: omegooliebird on August 29, 2019, 06:39:11 PM
Love it.   :thumbsup: What Lipos are you using?

These runs were with the Graphene 3,000mah 6s. 65c. 
Title: Re: 220mph Proximity
Post by: Dillwhacker on August 30, 2019, 07:19:09 PM
Awesome stuff! Watched it about ten times  :o
I'd be interested to know what cameras you used?
Title: Re: 220mph Proximity
Post by: omegooliebird on August 31, 2019, 12:56:18 AM
Awesome stuff! Watched it about ten times  :o
I'd be interested to know what cameras you used?

Hahaha, thanks! I've watched it a few times too :-) Have updated the video description and it includes all the parts used now, the cameras are Split-mini and swift-mini2.
Title: Re: 220mph Proximity
Post by: Coyote on September 04, 2019, 09:32:58 PM
Epic ! :)
Title: Re: 220mph Proximity
Post by: omegooliebird on October 24, 2019, 05:06:58 PM
Ready soon...big step up with this one.. hoping to see well past 300mph..
Title: Re: 220mph Proximity
Post by: Dillwhacker on October 24, 2019, 06:04:55 PM
Ooooohhhh I love the smell of paraffin in the mornings.....
 :P
Title: Re: 220mph Proximity
Post by: FPVSteve on October 24, 2019, 09:27:35 PM
That is not a plane it is an engine with wings - awesome!! Maiden eta?
Title: Re: 220mph Proximity
Post by: omegooliebird on October 31, 2019, 01:50:54 PM
Maiden this winter for sure. Not decided on launch method yet, gonna cross that bridge when it's ready. Suggestions welcome lol! Landing will be the difficult bit at 2100g with fuel...1600g empty...the longer it is in the air the better. Looking like around 2 minutes of full throttle and 7-8 minutes at idle, so something in between that will be flight times. Physically ranged checked already at 3km and it was solid, even did a remote engine spool up! No autopilot, so it needs to be solid! EZUHF and 1.3 have always served me well though. This really is at the limits of the airframe, and it could well see transonic airflow in some parts over the top of the wing, so the chance of failure is high. Just got to put it out there and try though, cant add any more strength as the weight is already dubious. All in it has cost around 4k so far which sounds filthy, but it is the only way to go this fast. The wing servos are MKS 6130HV which are 75 each for starters! But 8kg/cm is what it will take and they are the same servos Spencer Lisenby has used for the Transonic DP that set the DS record @545mph, so well proven above my anticipated speeds. A lot of uncertainty with this project, but excitement in equal measure!
Title: Re: 220mph Proximity
Post by: omegooliebird on December 08, 2019, 12:19:39 AM
Paint on!...Decided i'm not happy with fuel tank outlet, so have to make a part on a lathe to bond in, with a screw in cap to fit the pipes to. Then fill it up with fuel and see how that affects the CG.. then run it.. Getting close to standing in a muddy field with soiled underpants...
Title: Re: 220mph Proximity
Post by: omegooliebird on December 08, 2019, 12:25:37 AM
more
Title: Re: 220mph Proximity
Post by: omegooliebird on January 03, 2020, 12:24:58 PM
More problems...but at least it has made some fire, so it is getting closer....

Title: Re: 220mph Proximity
Post by: FPVSteve on January 03, 2020, 03:23:55 PM
why did it fail there Rupes? fuel supply?

Sounds fantastic though :) I could listen to that spooling all day :)
Title: Re: 220mph Proximity
Post by: omegooliebird on January 03, 2020, 10:08:57 PM
So many problems together Steve.. Still not fully resolved it...

The fuel pipe was slightly undersize for this engine, in the tank and external lines too.
The fuel filter was before pump not after it like it should be.
The battery was too small.
There was resistance in the JST battery connection (bad metal on connector contact)
I had a current sensor on the fuel pump to use mAh as a 'fuel guage', it was upsetting the pump PWM.
My throttle calibration was not right.

Basically have to completely re-wire and re-plumb the whole thing! I was just doing a quick engine test prior to flying it, having tested everything successfully with the exact same set-up on a test stand before installing it all.

Absolutely gutted to be honest, I have had to undo a lot of bloody fiddly work and have to re-think quite a few factors. Bigger battery means more nose weight, which completely removes the need for all the very difficult and extremely time consuming work I did making the nose longer to get CG right...
Title: Re: 220mph Proximity
Post by: Coyote on January 05, 2020, 12:41:27 AM
That's a lot of things to address !

I'm sure you will get it all done and balanced right, what sort of cost is the jet engine coming to in total ? Is it an expensive mod or not that big of a blow ?
Title: Re: 220mph Proximity
Post by: FPVSteve on January 05, 2020, 01:30:25 AM
You've come too far to give up now!!! And if you give up I guarantee you'll stare at it in six months and think "wish I'd kept at it six months ago".

Bit like my belly and diet lol.
Title: Re: 220mph Proximity
Post by: omegooliebird on February 02, 2020, 07:59:43 PM
Back on it! Some success! However the fuel pump now leaking and filled the plane with kero again.. :-( It is going to fight all the way this one...but it runs, that's the main thing.. :-)

Title: Re: 220mph Proximity
Post by: FPVSteve on February 02, 2020, 10:48:42 PM
Nice - you should start an ASMR channel on Twitch or something, I'd listen to that for hours :)
Title: Re: 220mph Proximity
Post by: omegooliebird on February 02, 2020, 11:09:24 PM
Nice - you should start an ASMR channel on Twitch or something, I'd listen to that for hours :)

Lol, I had to look up what that was!
Title: Re: 220mph Proximity
Post by: omegooliebird on February 05, 2020, 05:00:39 PM
That's it, I've thrown in the towel. Engine has to go back to Germany. Tried my absolute hardest.... everything is covered in kerosene... and just flame-out after flame-out. Gutted. Could be 3 months, could be 2 years, depends how lucky you are...+ more money I don't have. What a disastrous reward for so much hard work.
Title: Re: 220mph Proximity
Post by: ched on February 05, 2020, 06:33:21 PM
That's so sad, I thought you were almost there. Will they fix the engine and then test on bench?
I don't know how model ones are controlled but I assume there is some control on fuel flow and bleed offs?
How do you get it spinning to start? Some sort of compressed air starter?
I will have a closer look at your vids.
So sorry it's not running...
Title: Re: 220mph Proximity
Post by: omegooliebird on February 07, 2020, 12:37:10 AM
Right, got to the bottom of it finally!!!!!!!!!!!!!!!!

I had to try one more thing before sobbing whilst packing it in a box... the only thing I hadn't swapped out...the radio.
The EZUHF RX in the plane was very slightly faulty! An occasional intermittent pulse width / frame length with complete drop out for a frame randomly. I had tested the throttle channel with a servo twice before, to make sure it wasn't that.... but it seems the servo would brush over the lost frame without even so much as a twitch, but not the FADEC!  Also, throttle range was too wide, and the difference between low throttle position and throttle cut was just a bit too narrow, so the dropped frame/different pulse width was telling the engine to shut down!..and once that flame is gone, that's it.... it explains why it was inconsistent. The blue light on the FADEC would just dim for a millisecond, that was the only clue. So all set for some more testing now!!! Amazingly happy!!!!!!!!
Title: Re: 220mph Proximity
Post by: ched on February 07, 2020, 12:56:34 AM
That's great news. I look forward to hearing and hopefully seeing it in flight. We'll done, that must have been difficult to find?
Title: Re: 220mph Proximity
Post by: omegooliebird on February 07, 2020, 01:40:19 AM
I have probably got 20/30 hours in finding that problem lol. It was exhausting and demoralising, but the sense of achievement will be amazing should it fly successfully! Thanks for being supportive, it all helped me to press on...
Title: Re: 220mph Proximity
Post by: Coyote on February 07, 2020, 08:45:35 AM
That is "potentially" great news, hope it brings success :)
Title: Re: 220mph Proximity
Post by: FPVSteve on February 07, 2020, 12:51:32 PM
Lucky find Rupes, imagine if you had sent the turbine back and they'd not looked at it for months :(

Well done for being persistent ... I'll be honest, you're one of "the" FPV people who's every post I watch, it'd be a damn shame if you jacked it in!

Title: Re: 220mph Proximity
Post by: omegooliebird on February 28, 2020, 07:49:47 PM
Game on!!

New servos, re-wired, re-plumbed. All of the issues resolved (unless any new ones pop up). Batteries charged, fuel tanks filled up, exemption printed. Time for run-time testing to get numbers from the current sensor in line with the fuel pump, I seem to get a reliable reading of mAh which relates directly to fuel consumption. Just got to run a full tank and see the last number before it cuts out.

Have a possible deal for a heavy lift hexacopter which will be used to launch it, find out about that on Sunday...
Title: Re: 220mph Proximity
Post by: ched on February 28, 2020, 09:44:22 PM
Launch via hex!!!!!!!! WOW...
Fingers crossed it all goes well.
Good Luck.
Title: Re: 220mph Proximity
Post by: omegooliebird on February 28, 2020, 10:08:52 PM
Nothing like a bit of altitude to give some time, it's hitting the ground that usually breaks things! I have a good plan for a 4 point simultaneous release mechanism, so no need to mod the plane. I may be a month or so before I'm done building and testing that with Funjets. Will keep you guys updated on here..
Title: Re: 220mph Proximity
Post by: ched on February 28, 2020, 10:12:47 PM
The release would be a great thing to capture on video. Just like when they release missiles from plane wings. They drop then accelerate........
Looking forward to seeing your flights, thanks.

As they say it's not speed that kills it's the sudden stop..
Title: Re: 220mph Proximity
Post by: omegooliebird on March 05, 2020, 12:39:22 AM
Got hold of a big hex for a fair price.. Must have cost a fortune new, but times change..

Easily big enough to do the job, probably lift 6-8kg.. Need to fully rewire it and check EVERYTHING, but progress.. progress..
Title: Re: 220mph Proximity
Post by: omegooliebird on March 05, 2020, 12:41:05 AM
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Title: Re: 220mph Proximity
Post by: omegooliebird on March 05, 2020, 12:41:36 AM
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Title: Re: 220mph Proximity
Post by: omegooliebird on March 05, 2020, 12:41:57 AM
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Title: Re: 220mph Proximity
Post by: ched on March 05, 2020, 01:03:17 AM
Looks a good fit. Cheers for posting.
Title: Re: 220mph Proximity
Post by: omegooliebird on March 05, 2020, 01:07:58 AM
Thanks for being interested enough to comment Ched!! It is you, and those that comment and make suggestions whom I post these things for!
Title: Re: 220mph Proximity
Post by: Shikra on March 05, 2020, 10:09:43 AM
#guilty of following but not commenting  ^-^
Title: Re: 220mph Proximity
Post by: FPVSteve on March 05, 2020, 12:16:29 PM
Wont you waste a ton of fuel at idle while the Hex climbs? Might be worthwhile making a kickass catapult instead and just launching from the ground?
Title: Re: 220mph Proximity
Post by: omegooliebird on March 05, 2020, 01:35:18 PM
That is actually the plan...the plane will never land safely at it's fully fueled weight of 2.1kg, it would stall at around 70-80mph. So if it were to suffer a flame-out coming off a catapult, i would have no time to set up a landing, and given the landing speed, that would be the end. I also wouldnt like to catapult with a half empty tank to get the weight down, because of the slosh. So the idea with the hex is that it will burn some fuel (200g) on the way up, and shouldn't have the sudden g force associated with a catapult so is less likely to flame-out. Also, from the height we will release, there will be time to plan an approach and get it down on the anticipated strip even if it does have engine problems.
Title: Re: 220mph Proximity
Post by: atomiclama on March 05, 2020, 03:04:05 PM
A jet plane being dropped from a big hex what could possible go wrong  :o ;D

Bucking Frilliant I can't wait to see this in action.
Title: Re: 220mph Proximity
Post by: atomiclama on March 05, 2020, 03:05:27 PM
#guilty of following but not commenting  ^-^
Me too, but this.... well... words fail.
Title: Re: 220mph Proximity
Post by: ched on March 05, 2020, 08:59:58 PM
Thanks for being interested enough to comment Ched!! It is you, and those that comment and make suggestions whom I post these things for!
The reason I posted was that I was very interested in your project.
I worked for many years on developing jets, gas turbines, and all the control and instrumentation systems. So I have a slight understanding of these things, so seeing someone put one in a model is just great.
The technology has come on hugely but the skill is in putting it all together. It's not like there are thousands of people doing this to share the info.

I love that you are putting things together and showing us as you progress. It's a great project to watch progress, thanks for posting it and good luck.
Title: Re: 220mph Proximity
Post by: FPVSteve on March 05, 2020, 09:18:23 PM
That is actually the plan...the plane will never land safely at it's fully fueled weight of 2.1kg, it would stall at around 70-80mph. So if it were to suffer a flame-out coming off a catapult, i would have no time to set up a landing, and given the landing speed, that would be the end. I also wouldnt like to catapult with a half empty tank to get the weight down, because of the slosh. So the idea with the hex is that it will burn some fuel (200g) on the way up, and shouldn't have the sudden g force associated with a catapult so is less likely to flame-out. Also, from the height we will release, there will be time to plan an approach and get it down on the anticipated strip even if it does have engine problems.

Loud and clear - great answer actually!
Title: Re: 220mph Proximity
Post by: FPVSteve on March 05, 2020, 09:18:50 PM
+1 ched
Title: Re: 220mph Proximity
Post by: omegooliebird on March 06, 2020, 12:27:35 PM
Whilst trying unsuccessfully to go to sleep last night, I formulated a very simple no servo load solution that will also be easy to print in the right orientation. I will put bearings in the sear, and possibly a roller on the end of the servo horn to really reduce any friction. It will be easy to load, and will also add a touch of tension as it is engaged into position. The position/geometry is just conceptual, will do it on Fusion later and get everything right and make a prototype. Will probably mount the elastic slightly down one arm of the hex, so it pulls the strap well out of the way. Also will have a rod that goes through the body and the sear, that will be retracted by another servo, as a safety pin...Sorry about the drawing, my art didn't ever really progress after I left primary school :-)
Title: Re: 220mph Proximity
Post by: ched on March 06, 2020, 09:03:19 PM
Makes sense to me. It should be nice and easy to test on the ground.
Title: Re: 220mph Proximity
Post by: Coyote on March 12, 2020, 12:19:22 PM
This is going to be an epic maiden :)
Title: Re: 220mph Proximity
Post by: omegooliebird on March 15, 2020, 11:13:17 PM
Flew the extended arm monster hex today after totally rebuilding/rewiring it. Took every connector I could of it and re-soldered every joint just to be sure...you never know what is lurking underneath the heat-shrink..!!! It has buckets of power and is super stable, I didn't touch the gains on the Wookong, it flew perfect as it was. Crazy noise, I've actually not seen a multirotor this size fly before. Sounds intimidating!

Printed part of the release mech, but ran out of ABS filament, so waiting on more now. It is all getting pretty close... Looking forward to doing the first test drop with a Funjet.

I also realised that it will allow me to try some insane props on the electric Fusion, as the very over-square props are risky on the vert launches. So may be able to push the electric record further without spending a fortune on motors/esc's... Win-win!

I guess one plus side of this Snake-flu that is getting on top of us, is that self isolation does give one a chance to attend to some of those builds that are buried in the shed and we never had the time to get to... Maybe it will reinvigorate the build fever that used to be such a big part of the FPV community at the start.
Title: Re: 220mph Proximity
Post by: omegooliebird on March 18, 2020, 08:26:42 PM
Had my record beaten today!!! First time anyone has posted a faster video for 7 years! It is a good day!!! This makes the jet project even more exciting, and puts the pressure on! He is getting a lot of hassle for it being in a steep dive at the time of the highest number, but I am happy that it is a higher number than mine got to. I am pretty sure mine is about 60kmh faster on the flat, but that is not the point, he got a higher number with plenty of sats locked:

Title: Re: 220mph Proximity
Post by: ched on March 18, 2020, 09:50:20 PM
Maybe there should be 2 records, 1 unlimited, the second staying within legal height limits  :D
Looking forward to your flights.
Title: Re: 220mph Proximity
Post by: FPVSteve on March 18, 2020, 11:27:16 PM
Jeez, just a shade under 275mph is insane for a foam jet.

Interesting that he got it when the battery had been used as well so wasn't running full voltage...

Good luck Rupes!
Title: Re: 220mph Proximity
Post by: omegooliebird on March 19, 2020, 01:23:24 AM
The Omegooliebird is working hard...Things are coming along, printer has been running solid for 3 days.. Quite a bit more to do, but it's on it's feet with the bird in position..
Title: Re: 220mph Proximity
Post by: omegooliebird on March 19, 2020, 01:24:05 AM
...
Title: Re: 220mph Proximity
Post by: omegooliebird on March 19, 2020, 01:24:29 AM
...
Title: Re: 220mph Proximity
Post by: ched on March 19, 2020, 02:27:33 AM
Looks amazing.
Are you going to need a hex pilot as well as yourself to fly the jet?
Title: Re: 220mph Proximity
Post by: omegooliebird on March 19, 2020, 03:53:08 PM
..the girlfriend... what can go wrong... 'just hold the left stick up until I say press the button'...DO NOT press the button otherwise.'
Title: Re: 220mph Proximity
Post by: ched on March 19, 2020, 04:46:47 PM
..the girlfriend... what can go wrong... 'just hold the left stick up until I say press the button'...DO NOT press the button otherwise.'
Can't you lift off the hex, get to position then hand over the tx to your girlfriend to just press the button?

Maybe there is some sort of buddy box you could setup?

Interesting, I like your project, more solutions to be found  :D
Keep up the great work while we all avoid the virus  :)
Title: Re: 220mph Proximity
Post by: FPVSteve on March 19, 2020, 11:52:53 PM
Will the hex autoland because I imagine you'll be quite busy :D
Title: Re: 220mph Proximity
Post by: omegooliebird on March 20, 2020, 01:33:46 AM
I could take the hex up leave it in position hold, put the plane goggles on and hit the release button all myself...but, there is always a chance the hex could have a failure, and if it is falling I would want to abort and drop the plane to try and get it away before it all comes crashing down... So best if I have the plane goggles on the whole way through... Actually thinking about it, I could just pilot the hex from the plane FPV system all the way up to release... that would work! I could just pull the RTH on the hex once I settled down with the plane.. It is going to be proper exciting no matter what though :-)
Title: Re: 220mph Proximity
Post by: omegooliebird on March 27, 2020, 08:47:31 PM
Release mech working well... had a test carrying a plane on the hex too, will post a video of that later..

Title: Re: 220mph Proximity
Post by: ched on March 27, 2020, 10:42:52 PM
Looks good. Is it to go nearer cog or are you having 2 releases?
Title: Re: 220mph Proximity
Post by: omegooliebird on March 28, 2020, 12:16:53 AM
Going to try nose only release mech for testing first...less to go wrong.. Hex will be into wind with it's own nose down, so hoping it goes ok. The back of the plane should slide off it's shelf quickly after the nose is released.. But if the the test plane tumbles, I will have to have a re-think.. Absolutely on the fence as to whether it will work at this point! Release on CG not so easy without modifying the plane right where the fuel tank is...
Title: Re: 220mph Proximity
Post by: omegooliebird on March 28, 2020, 05:39:42 PM
Drop test next... but not under our current restrictions.. Otherwise, everything is going to plan so far.

Title: Re: 220mph Proximity
Post by: ched on March 28, 2020, 06:18:02 PM
It's looking great, nice and stable.
Can't wait for the drop test and being allowed out again  :)
A camera facing down to see the jet released would be cool. Bit like missiles released and falling.
Title: Re: 220mph Proximity
Post by: omegooliebird on March 28, 2020, 07:04:05 PM
Thanks Ched!! I managed to pick up a tatty Feiyutec mini 3d gimbal, so will fit that to the hex to film the drop.. And will try to have another quad follow it up and film from the side, to analyse the test drop and make sure nothing nasty is happening! Aside from the jet, I am really looking forward to dropping planes! ...and other stuff!! I'm guessing this thing will carry a water melon pretty easy! BOOOOM!!!
Title: Re: 220mph Proximity
Post by: ched on March 28, 2020, 07:27:14 PM
As per normal you have all bases covered.
Can't wait for this lock down to be over.
Title: Re: 220mph Proximity
Post by: omegooliebird on March 28, 2020, 07:58:16 PM
Only because you suggested filming the drop earlier in the thread mate :-) Cheers!
Title: Re: 220mph Proximity
Post by: omegooliebird on April 03, 2020, 09:36:52 PM
Gimbal is in, some wiring to do now.. Going to be a cool view though!
Title: Re: 220mph Proximity
Post by: omegooliebird on April 03, 2020, 09:37:58 PM
..
Title: Re: 220mph Proximity
Post by: ched on April 04, 2020, 02:02:15 PM
Looking good. I can't wait 😀
Title: Re: 220mph Proximity
Post by: omegooliebird on April 07, 2020, 07:11:49 PM
YES!! That view is going to be awesome, thanks for the suggestion Ched! All finished now as far as I can tell. Extensive testing to do. Hex seems to be getting warm in the hover fully loaded, so need to find out if the climb will be an issue. But the release is working, gimbal is working, camera switch working, hex is stable... Had to swap it over to EZUHF to get the 9ch I needed for everything, double di-poles should give it plenty of range though. No compass issues so far, but the jet engine might change that, we will see..
Title: Re: 220mph Proximity
Post by: FPVSteve on April 07, 2020, 09:24:15 PM
Complete with school to do a proper job on some starving orphans. Excellent.
Title: Re: 220mph Proximity
Post by: ched on April 07, 2020, 10:33:51 PM
That's looking great, just have to wait for the lock down to be lifted.... :)
Title: Re: 220mph Proximity
Post by: omegooliebird on May 16, 2020, 10:15:39 PM
Went out testing today, all went well. 2 full tanks through the engine, so got some numbers for duration and current/mAh of the fuel pump.. did a few drops with a 6s 200mph Funjet from the hex, flew the combo up to height, left it in position hold, pulled the release and picked up the other transmitter! It was simple actually and worked well. Pulled RTH to land the hex. Will try to put a video together.

Started building a new power system to go into the 265mph electric Fusion... 14s / 150-200a. The ESC is a 14S/200a APD..  so should make in the region of 8-10kw without fire. Have a couple of motors to try.  Maybe enough to get that plane past 500kmh/300mph.. Looking forward to hearing that. :-)
Title: Re: 220mph Proximity
Post by: ched on May 16, 2020, 10:34:22 PM
That's great news. Looking forward to seeing  the vids.

8-10Kw !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! that's the same as an electric shower!!!!! That sounds mad!!!! Can't wait  :) :o :) :) :o
Title: Re: 220mph Proximity
Post by: omegooliebird on May 25, 2020, 05:51:28 PM
All ready to go for a launch with the jet, but no site suitable. Need 3-4km for the run preferably over flat land so it can nice and low..and a huge grass field to aim for when the fuel runs out.. anyone have a site?
Title: Re: 220mph Proximity
Post by: ched on May 25, 2020, 09:14:31 PM
Nice long flat beach here in Blackpool but bit too close to airport  :D :D :D :D
Title: Re: 220mph Proximity
Post by: FPVSteve on May 26, 2020, 12:51:31 AM
Excellent ... "without fire" heheh :)

Is it getting any easier / less nerve-racking to fly?

Can I just say... you could do a sort of mid-air tug of war between the Hex and the payload ... full throttle, see if it can hold GPS position while the plane tries to pull it along. Just talking out loud here :D
Title: Re: 220mph Proximity
Post by: omegooliebird on May 27, 2020, 12:48:14 PM
Nice long flat beach here in Blackpool but bit too close to airport  :D :D :D :D

Sand / engine :-(
Title: Re: 220mph Proximity
Post by: ched on May 27, 2020, 01:30:23 PM
Sand / engine :-(
True don't want to risk FOD!!!
Title: Re: 220mph Proximity
Post by: omegooliebird on May 29, 2020, 07:34:38 PM
GAME ON!!! Permission granted...
Title: Re: 220mph Proximity
Post by: ched on May 29, 2020, 11:00:13 PM
GAME ON!!! Permission granted...
Looks perfect. Hopefully weather is perfect for you. Looking forward to the videos. Good Luck.
Title: Re: 220mph Proximity
Post by: omegooliebird on May 30, 2020, 01:55:39 PM
Jet engine tests. Ready for a Maiden on Monday hopefully..

Title: Re: 220mph Proximity
Post by: ched on May 30, 2020, 02:23:50 PM
Sounds wonderful, better than some of the development builds of EJ200  :D
Are you getting air in the fuel, seems a lot of bubbles?

Can't wait for maiden, good luck.
Title: Re: 220mph Proximity
Post by: omegooliebird on May 30, 2020, 02:31:52 PM
Thanks! The air in the fuel was the end of the tank...the first bubbles are coming from the main tank to the bubble tank/air trap, then you see bubbles on the lower pipe, that is the feed to the engine, and it cuts out as soon as there are bubbles in that line.
Title: Re: 220mph Proximity
Post by: ched on May 30, 2020, 02:53:01 PM
Might have guessed you had it sorted  :D
I worked on a mates ford van years ago, we transplanted an xr3i engine in it. It would only run for 20mins, then cough and splutter. Eventually after weeks we realised that it was air in fuel lines, caused by the pressure return. An air separator sorted it  :D :D :D :D
Title: Re: 220mph Proximity
Post by: omegooliebird on June 01, 2020, 10:54:56 PM
It was a success!!!!! YES!!!!!! Three years of messing around on and off, so many problems along the way, gave up drinking to help pay for the engine. Nearly gave up on the whole project a few times. I have learnt a huge amount about composites, electronics, jet engines and patience! Follow your dreams kids: The new worlds fastest FPV plane @ 502 kph / 312mph. (more to come).... Thanks for all the support along the way guys!!
Title: Re: 220mph Proximity
Post by: Dillwhacker on June 01, 2020, 11:07:59 PM
You total rotter !! Stop editing and let us see the damn video  ;D
Title: Re: 220mph Proximity
Post by: ched on June 01, 2020, 11:31:29 PM
WOW that's getting on for mach 0.4!!!!!
That's impressive, well done. Really shows your dedication and hard work.
Can't wait for the vids.
Title: Re: 220mph Proximity
Post by: FPVSteve on June 03, 2020, 10:56:51 AM
Well done Rupes....!

inb4 400mph....
Title: Re: 220mph Proximity
Post by: ched on June 03, 2020, 05:25:44 PM
Wonderful, well done. Everything worked perfectly first time. What great work.
Loved the under hex drop shots  ;D especially slowmo.
You used a bit more fuel than the current would suggest but WOW perfect flight and you made it back to land. Loved the flypast of the quad at low level where you could hear engine!!!
Great, can't say well done enough..
Congratulations on all your hard work and many many hours of work.
Title: Re: 220mph Proximity
Post by: omegooliebird on June 03, 2020, 05:46:47 PM
Thanks so much for the support along the way, and suggestions. It all helped this project be a success! So happy!

Title: Re: 220mph Proximity
Post by: Coyote on June 10, 2020, 03:36:27 PM
Bloody Epic !
Title: Re: 220mph Proximity
Post by: omegooliebird on October 02, 2020, 09:46:48 PM
Quick update for those following..

Sorry for not making another flight yet! After all the up's and down's of getting the plane working, and the nerves to fly it... I needed to put it to bed for a bit, so I can truly enjoy the next flight.

In the mean time I have been putting together a new power system for the electric Fusion.

Battery: 14s (4s+4s+4s+2s in series) of 2,000mah Tattu 'R' line V3 120c cells. Should be able to output close to 10kw.
ESC:     APD F-200 which should be able to flow 200a-300a at 55+volts.
Motor:   ????

It is using a folding prop in the region of 7x12 (the length and pitch will be tuned with different yoke/centrepiece). It should have an efflux speed of around 5-600mph..but I am mindful that this may prove too much for the motor in the end..again we will see.

The plan is to get this set-up ready in the plane, and fly that and the jet on the same day..with the aim of trying to get 600kmh with the jet and 500kmh with the electric. Big goals, but you have to have dreams!

Title: Re: 220mph Proximity
Post by: Coyote on October 22, 2020, 07:03:59 PM
Looking forward to seeing the video :)
Title: Re: 220mph Proximity
Post by: ched on October 22, 2020, 09:05:08 PM
wow, thats some power. Looking forward to the vids too.
Title: Re: 220mph Proximity
Post by: FPVSteve on October 22, 2020, 09:11:04 PM
Wow that is some spec. And I thought my 4s Mini Talon was fast lol.

Good luck!
Title: Re: 220mph Proximity
Post by: omegooliebird on November 01, 2020, 05:39:29 PM
Hi friends. Had the first smoke test with the 14s battery/ESC/motor today. Scary, screamy, vicious little rotter :-) All good, no desync or smoke. Supersonic tips already at 3/4 throttle, so will have to really load it up with pitch on the prop..

Title: Re: 220mph Proximity
Post by: omegooliebird on November 19, 2020, 12:27:38 AM
Folding carbon prop is here from Germany, but the blade area looks too small to use all the power this set-up has, so I will get more blades and run it as a 3 or 4 blade most likely.

Increasing diameter would increase tip speed, so more blades will allow the high rpm I want for thrust efflux speed, but with the thrust volume increased from the extra blades. Lunch is never free though, the amps would skyrocket, so it may be a 3 blade compromise.

Will fly the prop on a 6s Funjet to see how it compares to off the shelf props. Let's hope the blades are strong haha!

(http://)
Title: Re: 220mph Proximity
Post by: ched on November 20, 2020, 10:51:23 PM
Looks nice. What sort of speed can prop tips go without causing issues?
I know that a military helicopter had special blade tips developed to enable them to go super sonic, if I remember correctly that is, can't say more than that, you know official secrets etc.... :-) 
Title: Re: 220mph Proximity
Post by: Dillwhacker on November 20, 2020, 11:11:26 PM
You're going to have to do that collet up mighty tight (:+}
Title: Re: 220mph Proximity
Post by: omegooliebird on November 21, 2020, 02:24:31 PM
Thanks for the replies, wondered if it was still worth posting on here.

Yeah prop tips have to stay sub-sonic really or there is huge efficiency losses and potential for blade failure from the pressure waves. I haven't cared in the past, as that was the only way to get the pitch speed up using off the shelf props...but for 500kmh+ I'm going to need every bit of efficiency. Interesting that there have been blades designed for supersonic use, but I imaging it was polishing a turd somewhat.

And yes..that collet lol.. will have a slot milled in it to key the yoke in..the shaft-collet friction will be the issue, but may go up to an 8mm shaft on the motor to add surface area for that transfer of power. 8-10kw will destroy just about anything.

I am also working on another route to 500KMH electric.. using this rewound Scorpion 4535 at 14s/200a with an 11x27 Powercrocco prop on an HJK Monster F3S plane. Serious stuff this time ;-0
Title: Re: 220mph Proximity
Post by: ched on November 21, 2020, 03:18:35 PM
Interesting that there have been blades designed for supersonic use, but I imaging it was polishing a turd somewhat.
There are a few non secret details of early dev on blade tips here: https://www.bahg.org.uk/puma.htm (https://www.bahg.org.uk/puma.htm)
I worked for DRA/DERA/QinetiQ testing jet and gas turbines :-) I knew a few who worked on the tips testing.
Title: Re: 220mph Proximity
Post by: omegooliebird on November 21, 2020, 03:49:33 PM
Very interesting mate! Thanks for the link! It would be interesting to hear the findings of the testing.. rotor blades still look unchanged on commercial heli's, so I guess there must have been trade-offs. The faster the advancing blade, the slower the retreating blade, so there must be a max speed for the advancing blade on a heli. But for our application, it is just the blade rotational speed coupled with the forward speed at 90 degrees to rotation that dictates the actual tip speed, some kind of trigonometry to work it out, above me lol. But making supersonic tips work would mean you could use less pitch, which i turn means some static thrust.. unlike an 11x27 haha!
Title: Re: 220mph Proximity
Post by: ched on November 21, 2020, 04:26:06 PM
I think it was to do with speed that they wanted out of the heli or maybe it was lift. One thing to note is that commercial aircrafts have to comply with noise regs. Military aircrafts don't :-) So it could be that the tips help speed or lift but create lots of noise. Again civilian aircrafts have fuel consumption specs that they must adhere to, military aren't very bothered. Can't remember much, had a few chats over a coffee with a few of the blokes that used to work on testing the blades. Quite often when testing stuff you were never told why the tests were being carried out as that might bias the results. Some of them also worked on the Concorde engine and intake development and testing way back. Used to be some interesting conversations. There was a Red Dwarf episode where part was filmed in the test cell where Concorde intake ducts were developed!!!
 
I remember doing flight certification test for RR Trent 500  (civilian) and they were trying to get me to 'tweak' the thermodynamic calcs. I thought it was a bit iffy so had a chat to our mathematician to confirm that the 'tweaks' would alter things in their favour!!!! I was in charge of the data and calcs that would be submitted to CAA to gain the engine flight certification. Unfortunately we never did the chicken ingestion tests :-) Lots of water and ice but no chickens.

As for your props, way above me mate. Thermodynamics I had a reasonable understanding of, well calcs anyway not theory.
Always interesting to hear about the lengths you go to to build your crafts.

Title: Re: 220mph Proximity
Post by: omegooliebird on November 22, 2020, 06:56:32 PM
Another quick test today to see amps at full throttle on 14s.. peaking around 180a.. guessing 50v under load....so, 9kw... that's 12 horsepower according to Google..through a 7 inch off-the-shelf prop!! It is so insane I can't quite make sense of it.. Some losses along the way, but that prop hub is still probably seeing 7 or 8 kw .. it's just incredible.

Title: Re: 220mph Proximity
Post by: Coyote on November 23, 2020, 06:03:27 PM
That sounds vicious :) :)
Title: Re: 220mph Proximity
Post by: omegooliebird on November 27, 2020, 09:20:09 PM
Another speed project for LOS @ 500kmh. Roughly the same power as the FPV plane, so it will be interesting to compare the speeds.
(https://i.postimg.cc/XBy4Pvw2/20201127-111729.jpg) (https://postimg.cc/XBy4Pvw2)

(https://i.postimg.cc/6ynBLy6q/20201127-111734.jpg) (https://postimg.cc/6ynBLy6q)

(https://i.postimg.cc/7bCHhKpg/20201127-111741.jpg) (https://postimg.cc/7bCHhKpg)

(https://i.postimg.cc/pyg2FDH3/20201127-111807.jpg) (https://postimg.cc/pyg2FDH3)
Title: Re: 220mph Proximity
Post by: ched on November 27, 2020, 09:37:05 PM
That looks built for speed. Looks great, beautiful finish you have achieved. Can't wait to see vid.
Title: Re: 220mph Proximity
Post by: FPVSteve on November 27, 2020, 11:39:34 PM
Looks awesome, love the paintwork.

.... I assume the vertical stabiliser is coming?
Title: Re: 220mph Proximity
Post by: omegooliebird on November 28, 2020, 12:43:17 AM
I didn't build the airframe, this was purchased from HJK Speedwings in Germany. I bought the motor second hand from Germany also. The finish is actually the carbon with a tinted laquer, it is spread-tow carbon fabric that is used in the outer layer of the layup. The quality of the work is incredible. A work of art.
Title: Re: 220mph Proximity
Post by: omegooliebird on November 29, 2020, 12:16:26 AM
Also got this off the wall and went through it, put a different motor in (Leopard 3674 v2 1900kv) and will be using it as a prop test mule for the 14s Fusion. It's previous best was 412kmh, but think it is capable of much more with these new carbon oversquare props at lower rpm. Glassed wings and vac moulded carbon rear end to take the bigger motor. It is a heavy old beast though for what it is! So much speed addiction going on at the moment!



(https://i.postimg.cc/BjBP5SN2/20201128-200312.jpg) (https://postimg.cc/BjBP5SN2)

(https://i.postimg.cc/jWqwZpkm/20201128-200320.jpg) (https://postimg.cc/jWqwZpkm)

(https://i.postimg.cc/LgVwXckk/20201118-131823.jpg) (https://postimg.cc/LgVwXckk)
Title: Re: 220mph Proximity
Post by: omegooliebird on November 29, 2020, 05:16:57 PM
Did another motor test today, with the German folding prop (7x14) on the 14s system. It stayed together which was pleasing, it really loaded the motor, showed a peak of just over 9kw. But more battery sag, so hopefully it will unload a bit in the air. But it works and the efflux speed has got to be 400mph+, so it should push that Fusion past 300mph if the thrust volume is enough, this high revving motor wont take 3 blades, so would need lower KV to use more blades.. The noise though is on another level, it is absolutely deafening in the garden, the echo's when it stops are pretty mad. Neighbours on the other hand..
Title: Re: 220mph Proximity
Post by: omegooliebird on December 08, 2020, 01:45:21 PM
Quick catch up..

I wanted to use the Goblin as a prop test mule, and also try lower kv on it, but ran into problems... more drag than I was expecting, the Goblin was 50kmh slower that the Fusion with the same setup.. so it will be no good as a test mule. But it raised enough questions to do a couple of tests with other props, which I have just done this morning:

I tested Goblin motor against Funjet/Fusion motor to see why the Goblin was so much slower... The RPM are the same, amps the same. So it is a drag thing. I am shocked it has so much more drag than a Funjet, and I'm still not convinced, having seen similar speeds with the higher KV motor. I just don't understand. But it would also make sense as to why other people aren't well past 200mph with it already. It is very slippery for sure, but maybe I am used to how much more slippery composite planes are. Also, maybe the Goblin performs much better with a dive (was foggy so couldn't) because of energy retention or something? i don't know, but it isn't much use as a test mule with so much lower speed than the airframe I'm testing for. Goblin will probably go back on the wall for the rest of it's life now which is sad for it!

But something was apparent, and that is how astonishingly more powerful the 14s system is, it is twice the wattage and twice the noise! Going back to running up 6s setups again was like going back to the early 3s days lol!! It just feels weak and pathetic hahah. So I will give up with mule testing and just go for it with the Fusion airframe. I am still waiting on firmware from APD so that I can get RPM/amp data out via telemetry output to an osd, whilst using a pwm input for throttle..it is currently only possible if driving the ESC with a DSHOT throttle input... they said before Christmas.. but that probably means February or something.. Other than that, I'm ready to go for the 500kmh electric. Could just run it without data, but would really love to know RPM and amps in flight.

Something else I would like to understand, is the effect of kv on torque.. Having run 2650kv at 300a, my plan was to run lower 1900 kv with a bigger prop at 300a so it was putting the effort into torque more than silly RPM, but it seems like the lower kv simply hasn't got any more torque to drive the bigger prop.. I suspect that a given motor size will produce a given amount of torque no matter the KV. It seems like the motor size has an ideal torque/rpm, and you use KV to set voltage you wish to use to obtain that rpm/torque.. So with the 1900kv, for it to run in the sweet spot, it should be on maybe 8s and producing the same rpm as the 2650kv to obtain it's full power output in watts. I loaded the 1900kv up with the 7x14 on 6s and it had no rpm at all, simply couldn't pull it, but was only showing 230amps.. Now if that was the 2650kv, it would have been showing over 300a before it was saturated and couldn't pull any more... does this make sense, it is hard to put into words!!
Title: Re: 220mph Proximity
Post by: ched on December 08, 2020, 02:42:14 PM
Interesting stuff. I would guess that the torque is within a relatively small band for a given motor size irrespective of kv but I have nothing to base that on. My motor theory college days are near 30 years old now :-) I seem to remember that greater efficiency was achieved by using thinner copper windings as there was then less air gap between windings but that of course limits current. I think increasing number of turns reduced rpm and increases torque but no idea how you find that out, I suppose resistance.
All interesting stuff, cheers for posting.
Title: Re: 220mph Proximity
Post by: FPVSteve on December 08, 2020, 05:10:58 PM
Are the propellers the same pitch? Increasing pitch will surely require more torque to maintain a specific RPM at given voltage thus more power consumed?
Title: Re: 220mph Proximity
Post by: omegooliebird on December 08, 2020, 06:03:12 PM
Yes, increasing pitch does require more torque, but lowering the kv does not increase the torque the motor can produce is my finding. It may be different at lower power levels, but I am working at the point when the motor is becoming over saturated. The lower kv motor became saturated at less amps, so the overall wattage was less.
Title: Re: 220mph Proximity
Post by: omegooliebird on December 28, 2020, 03:46:27 PM
14S maiden was going to be today. Got everything charged, prepped and ready, (including our baby), got to the field and it was so muddy the van got stuck in the gateway, it was too windy for the launch drone, and too foggy to fly a speed-plane. F**k English winters, they are good for nothing! And F**k 2020. I'm going to do this next year.
(http://)
Title: Re: 220mph Proximity
Post by: Coyote on December 28, 2020, 03:55:59 PM
Lol I would think that's a brilliant idea given this year so far :)
Title: Re: 220mph Proximity
Post by: ched on December 28, 2020, 04:40:35 PM
Well it might have to wait till new year. weather isn't looking good for quite a while at moment. More snow on way for some!!!!
Good luck and have a Great New Year.
Title: Re: 220mph Proximity
Post by: FPVSteve on December 28, 2020, 08:22:39 PM
Snow + FPV = :D