Buddy,


This engine can spin props as large as a 15x10, or a 16x8, but I would consider this pushing to the limit.

16x5 would be best for 3-D, I guess. The 15x4W may be too light.

The carburettor, although no longer in production, has no obvious secrets.

The mini tuned silencer will give a noticeable torque boost in the same RPM range (larger prop - same RPM).