The plane … a Composite-ARF Yak 55SP

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Watch the eYak 55SP Demo Flight Videos

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Hi-Quality Video 302MB

The plane …
	an electrified

Composite-ARF.com 2.6m Yak 55SP

Pilot = Manfred Greve

seen here at the 2005 Tucson Shootout Invitational

Specification
	Span: Length: Weight: Engine:	2.6m (102") 2.3m (91") 13.5 kg (30 lbs.) 100 cc ??? NOT! *
	Radio:	9 Servos

From the Composite-ARF.com pages …

The Yak-55SP is possibly the best flying plane ever. Well, this is confirmed by a lot of customers, who own and fly one of our big 3.3m flagships. The Yak is the straightest flying plane we have made. No knife-edge coupling at all, very constant speed in up- and down lines, perfect snaps and unbeatable 3D capabilities.

Now it is finally done! We have managed to make the Yak in a 2.6m (102") version. And would you believe it, it flies just as well as the big one. It has all the great characteristics, and powered by a 100 cc engine it really has a great performance envelop.

We are glad to announce that the prototype of this marvel exceeded all our expectations of the performance of a 2.6m aerobatic plane. For two reasons: Well, it's a Yak on the one hand, and on the other hand, it's a Composite-ARF....

* Instead they installed a Plettenberg Predator 30/8
brushless electric motor …

See that big hole in the spinner?
There’s an impeller to force air through the center
of the motor for cooling …

Yes, @50Volts and 220Amps they’re running 11KiloWatts of power through this 4” diameter OutRunner … NO GEARS!

128 rpm/V … 1350 grams = 3 lbs. … about 15-H.P.

Looks like Plettenberg will market the motor as a 10KW motor but it has already been estimated to as much as 13KW at computed maximum V’s ‘n A’s … and melting temps?

Email Plettenberg or US Predator Sales for availability …

tell’em you saw it on Walt’s brainless.org web site please …