Struggling climbing with x-cub at highly altitude

Testing myself on the Alp Challenge and loving the environment. However I’m really struggling to climb past 11k with the x-cub. With full throttle, Rps and only 200vs I’m still losing speed at that altitude. What am I missing/not doing?
Thanks for any advice :blush:

Hmm… that might be it, will try. Thank you very much. Probably I’m used to that being set automatically by my difficulty settings outside Bush Flights.

There are some mods you can try that increases the engine power and changes the flight dynamics. The aircraft becomes a whole lot better in my opinion.