Extreme Flight YAK-54 ARF, Инструкция по эксплуатации

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The Yak exhibits very little coupling in knife edge flight. There is virtually
no coupling when using the small amount of rudder needed for point rolls or
slow rolls. When flying slow high alpha knife edge you may experience a
small amount of coupling. Full rudder rate is typically not needed for this
maneuver and too much may result in excessive coupling. Experiment with
your throws and CG to find the sweet spot. Save full rate rudder for flat
spins. And speaking of flat spins, the Yak performs the flattest, slowest
descending flat spins I have ever witnessed. The spin is very controllable
and is easily exited by neutralizing the controls and adding power. One of
my favorite moves is to allow the plane to flat spin down to 10 or fifteen feet
from the ground, then add power and begin climbing back up still in a spin.
Lots of fun and it gets the heart racing!
The Yak will also perform the most beautiful, round knife edge loops. It has
so much rudder authority that recovery on the backside of the loop is
typically at idle! This is an impressive sight to behold.
The Yak is a very axial rolling airplane. Its massive ailerons provide
tremendous control authority in the roll axis, and high alpha rolling
maneuvers are one of its strong points. This incredible control authority
allows you to start, stop and change direction of roll instantly. The Yak will
obey your every command.
Another of my favorite maneuvers is one I have named “The Aneurysm”.
This maneuver is basically a medium speed tumble on 3D rates. It is similar
to a lomcevak and I have been able to get the Yak to tumble tail over nose 3
times on occasion. This is a very stressful maneuver on the airframe and
great care must be taken not to enter it too fast. From medium speed flight
pull to a 45 degree upline. Using 3D rates, simultaneously chop the throttle,
give full down elevator, full left aileron, and full right rudder. The Yak will
tumble tail over nose. Please use caution when performing this maneuver!
As I mentioned, it is very stressful to the airframe!
Please use common sense when flying the 50cc Yak. The Yak’s airframe is
very robust, but all airplanes have their limits. Take great care to prevent
over speeding the airplane which could result in flutter and complete
destruction of your Yak. Reserve full power for vertical lines and always
have the engine at idle when the nose is pointed down. Inspect your plane
thoroughly after each flying session, looking for loose screws, fatigued or
worn servo gears, sloppy linkages or loose covering. With proper
maintenance, your Yak will provide you with many seasons of aerobatic
excitement. Thanks again for your business! See ya at the flying field!
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