ORIGINAL: DMcQuinn
And are you sure that the tank is really dry after your 11 or 12 minutes of flight? Can you see the tank and verify that it is indeed run dry? Or are you just assuming it is empty because no more fuel comes out the carburetor line? One common situation is that the clunk gets stuck somewhere inside the tank and you think you have run out of fuel, but really there is still some left.
this may be the case, but hobbico in all their wisdom put a white, non-see through fuel tank up front.... i tried running it and using a high powered light.to see into the tank, but no luck there. if the needle valve is set correctly i might have my instructor come over and help me disassemble the engine mount to access the tank.
I just checked and shook the plane all over, i dont hear the cluck rattleing in there...(sigh)