Hi everyone.

I didn´t Know where to ask, and figure you combat guys would be the right ones.

I have a Birdy ten and I Live in México City where we fly at an altitude of 2,240 metres (7,300 ft) over the sea level, therefore we loose a lot of power from the combustion engines.

This Birdy ten is really tight on its cowling fitting only a 15 size engine......but i really doubt this will be enough power for the plane.

Could you recommend wich is the most powerfull 15 sized engine or if theres any 25 sized engine wich might fit in a 15 sized cowling

Best Regards.
VÃ*ctor Arreola.