Value of a three blade prop?

[Bob Cook]

Hugh

Each application is different and each aircraft/hp responds differently.

In theory you obtain more "bite" with three blades at lower speeds. Efficiency is based on the pitch ie. 72 meaning one revolution the blade will move forward 72 inches. The difference in free air is the slippage thus the efficiency.

In the case of the MG blades being composite their is a considerable weight savings. With the harzell on the super skymaster there is a weight gain.

Since the skymaster is not a particularily efficient bird, the difference between a two and three bladed prop is probably not seen, however, in the case of the mooney there is a considerable difference.

In the case of the IO360 the MG props will give you a reduction in weight and possibly an increase in cost of maintance when FOD occurs. (MHO). This is the only 3 bladed prop certified for the 360.

I'll stick with aluminum and a file...... <G>

Bob