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Author Topic: 220mph Proximity  (Read 9047 times)

Coyote

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Re: 220mph Proximity
« Reply #15 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 ?
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Education and schoolin is good, but FPV is gooder :)

FPVSteve

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Re: 220mph Proximity
« Reply #16 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.
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omegooliebird

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Re: 220mph Proximity
« Reply #17 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.. :-)

« Last Edit: February 02, 2020, 08:43:23 PM by omegooliebird »
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FPVSteve

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Re: 220mph Proximity
« Reply #18 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 :)
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omegooliebird

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Re: 220mph Proximity
« Reply #19 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!
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omegooliebird

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Re: 220mph Proximity
« Reply #20 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.
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ched

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Re: 220mph Proximity
« Reply #21 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...

omegooliebird

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Re: 220mph Proximity
« Reply #22 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!!!!!!!!
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ched

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Re: 220mph Proximity
« Reply #23 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?

omegooliebird

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Re: 220mph Proximity
« Reply #24 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...
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Coyote

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Re: 220mph Proximity
« Reply #25 on: February 07, 2020, 08:45:35 AM »

That is "potentially" great news, hope it brings success :)
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Education and schoolin is good, but FPV is gooder :)

FPVSteve

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Re: 220mph Proximity
« Reply #26 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!

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omegooliebird

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Re: 220mph Proximity
« Reply #27 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...
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ched

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Re: 220mph Proximity
« Reply #28 on: February 28, 2020, 09:44:22 PM »

Launch via hex!!!!!!!! WOW...
Fingers crossed it all goes well.
Good Luck.

omegooliebird

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Re: 220mph Proximity
« Reply #29 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..
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