Hi all,
I am flying a CMpro SWALLOW-EX with an OS FS-91 and 14X6 APC prop (10% nitro CoolPower). The plane is under-powered possibly due to angine not performing well. The RPM is 8800 static at full throttle. Is it normal or do I make a mistake? The engine is (hopefully) well breaked and until now I have burn more than 2 gallons of fuel.
Can naybody help me? I do not believe that the OS FS91 is so powerless.

Thanks
Yannis Solaris
Greece