No, a gear reduction drive is not utilized - this is a direct drive setup.
Originally posted by Diablo
They Byron prop system is a gear drive reduction right?
Figure our the reduction ratio by counting the number of teeth on each of the gears and dividing the numbers into each other. Take your measured prop rpm and multiply by this ratio - this tells you the actual engine rpm. If it's in the range of 6,000-8,000 then your engine is likely turning in the desired power range for this size engine.