Flyingwings Falcon EVO FPV

Started by foamster, April 10, 2015, 11:45:54 AM

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skyscraper

The paint job on my Falcon was too nice. so I decided to F*ck it up  :laugh:



Now just to find some Gorilla glue...

regards
Andy

Billy_boy_2010

Am i the only one who's struggling with thrust angle? 

After trimming for mid throttle, nailing the power makes it climb big time.  This would indicate either a very nose heavy plane or incorrect motor thrust angle no?

I'm going to bring the prop a little lower and see if that helps.

iPeel

Quote from: Billy_boy_2010 on July 09, 2015, 11:51:13 PM
Am i the only one who's struggling with thrust angle? 

After trimming for mid throttle, nailing the power makes it climb big time.  This would indicate either a very nose heavy plane or incorrect motor thrust angle no?

I'm going to bring the prop a little lower and see if that helps.

Try adding a couple of washers behind the motor plate on the top two screw holes.

Billy_boy_2010

I have added 3 :)

There's still a tiny bit of thrust angle. Perhaps 3-5 degrees.

stevec

have you done the dive test? dive at 45 degrees or so and shut power off, let go of the sticks, if it dives more it is tail heavy, if it pulls out it is nose heavy...

power is eliminated from this test so you can tell if it is CG or thrustline when you compare the straight and level power on to the dive.

/Steve

skyscraper

I admit I havent flown my Falcon EVO yet, but the stock thrust angle looks very jaunty. I would expect there to be way too much up thrust .. Maybe this was done on purpose. There is bound to be some tolerance on the actual angle dependent on how its built so..  Better for it to head skyward on Maiden launch than wind itself into the deck!

regards
Andy

Brucey

Does the dive test work with a wing? They have reflex (up elevator) as the airspeed increases it will start to pull up.

BlueFlyer

Well, for good measure, I'd like to say that I have no problems with the thrust angle on my Falcon Evo #justsaying

stevec

Quote from: Brucey on July 10, 2015, 10:47:28 AM
Does the dive test work with a wing? They have reflex (up elevator) as the airspeed increases it will start to pull up.

never tried it but I don't see why not, it wont keep gaining speed once it is established in a dive it will reach terminal velocity for that angle and just stay put.

I reckon it will work, but I have no first hand experience of trying it with a wing. both the previous ones have gone in hard before I have got around to fine tuning \0/...

FlipastRC

Just to add no problem at all with the two Falcon Evo wings we have built, tested with no flight controller flew as straight as an arrow. Added a hobbyking t1000fc after that so even more stable if not a little bit placid. Added a small amount of reflex.


https://youtu.be/tWPHhfEWdhI

iwan_canobi

Finally back in the land of the living and with broadband activated in the new house! Took a break from painting the house and....painted my Evo! My airbrush crapped out on me so had to hand paint the coloured bits so they are a bit wonky, but should look fine once it's all laminated!

Hopefully get some time tomorrow to do some more building. Got a Tornado OSD to go in, 30A ESC and a nice 1040kv Leopard motor on 4S. Got some 2200's that fit perfect. Not sure on prop yet, probably 8x6 I think.






Billy_boy_2010

Looks great.

It will be a rocket on 4s!

Hawkview

My Maiden flight of falcon evo with a openpilot
Footage from the phone camera :)
http://youtu.be/-BpfJfK2NrA

Brucey

Cool, welcome to the club!

Piers283

I decided to take my evo above the clouds :o. I love this thing!

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