Got hurt!

Rotating nylon propeller on OS 25LA motor, 9by5 hit me on the tip left side ring finger yesterday, just because of lack of concentration and of making little of a small motor. This accident was the secondary one for me, the first was done by Super Tigre 46, 40 years ago on the test bench, right thumb finger at that time.

Test flight of Sukhoi Su-31 proved that the exhaust gas vibration has enough energy to destroy the construction of Super Toyoron with bias-like reinforcing fiber, any measure for this inconvenience should be considered. YS 60SR motor with earlier exhaust timing has good performance when used with Hattori tuned pipe. Sound is clear and stable at speed controlling phase. THC FS15 specific fuel for competition plays a good part of maneuver flight, 30% Nitro-Methan is not always necessary under a well pipe length adjustment, pipe-in condition.

40 Pylon Racer and 2 of OS 46 VF rear exhaust motors had been arrived at my hand. I must go ahead on F3D field also.  Combination of tuned pipe and 2 cycle speed racing motor has something different fun from another field. Controlling the exhaust gas is very interesting because it is difficult to understand.