Predator build and fly thread (tip stall warning!)

For those of you interested in the Nitroplanes/Hobbyking Predator (they're essentially the same plane), here's a great build thread on how to make it, along with a very sobering set of warnings and lessons learned the hard way about how it flies. Basically, tip stalling is a huge problem and you have to land it with long, straight and fast glide paths or it will crash (I've already lost one that way). Basically, it's a poor airframe for UAV/FPV/AP use; we just use ours to show off at conferences.

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Comment by Jonathan Simmons on December 4, 2010 at 8:23am
Where did you buy your Lancair from? It look like an excellent UAV platform.
I'm working on a Predator but hope to expand in the future.

Comment by Krzysztof Bosak on December 5, 2010 at 12:30pm
This is Lancair GP EP for GreatPlanes,
a TERRIBLE UAV platform.
underpowered in my case, very small wing chord, wing loading some 60g/dm2 and high torque effect on roll.
Barely flyable in RC mode without turbulators, with turbulators can accept very high AOA but still needs hot approaches that you flare at 0.5m altitude (without turbulators any attempt to flare ends in stalling above ground). Don't even think using landing gear unless got exceptionally smooth airfield. Needless to say it 'feels neutral' on roll and that you cannot toss it reliably since it is a low wing plane,.
Comment by Jonathan Simmons on December 6, 2010 at 2:34pm
I suppose I'm a fool for aesthetics. I'll look for a more stable platform and hopefully get my predator flying, any suggestions of planes would be appreciated.
Comment by Jeffrey Torella on December 6, 2010 at 3:23pm
I think it would be worth getting one for my kids ceiling might make a decent decoration.


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