I did the maiden yesterday and boy this is a great flying plane. I am not a 3d flyer but I had Dave at out field fly the Yak and it did everything one would expect from a Yak-54. The EME-35 was the perfect engine for this plane and with the 19x8 prop it had unlimited vertical. The plane weighs in at 11.5 lbs and the engine is producing 19lbs of thrust and it is not broken it yet. I did have a problem that accrued but it was with the fuel tank and not with the plane. I have repaired the fuel tank issue and ready to fly again. I will buy more planes from RCJETSWORLD.