hi,

I would need some experienced people advice...

I'm on the way to make a f22 (1.4m wing span)...I am not sure if I want to direclty put a turbine inside as If it crash it would be costly...
I am thinking of putting ducted fan system with os 91 and ramtec 5" fan for some time...

There is differents points on which I am not really sure of what to do:
- putting directly the turbine...(I think this is the worst idea...lol)
- putting one engine...(will thrust be enough to fly???)
- putting two engines...(would be better but would require some adaptation when I will finally put the turbine..(exaust pipe to be bifurcated...inlet pipes...etc...).

the carbone fiber plane estimated weight is around 9kg loaded...I hope it will be less but for safety I take some margin...