Another few trim flights today!!

I got to trim out for K-E coupling. It required 17% elev on left rudder and 19% elev on right rudder. I got to test tumbles. It seems with good practice you can do end over end tumber without any altitude drop!!! Amazing. I purposely pushed and banged the sticks and did not yet find any deterring bad habits. This has to be the best upright flat spin on any airplanes I've flown including 36% AW Katana, 35% C-A Yak 55sp, and bunch more. As you enter the flat spin, more right aile is applied to flatten the wing and more power applied to pick up the nose. As it stablized it spins about the axis near cg point rather than near wing tip on most other birds. As a result you get blindingly fast spin and it is dead flat. With more experiment in slowing down the decent, it might even be possible to do a flat spin landing. Hover is done with up elev held. It was expected as the vertical cg is well below thrust line due to low wing design and lower stab position. It may require a little upthrust to tame this.

Vertical is..... well.... should I say rocketlike?

I really wish I have the 2.4lb zdz40RE on it try.