Hi there all

Here I come with another question which I'd like the answer of, and I hope it's not a silly question.[8D]

Is there any disadvantage of using not correct size prop which is recommended by any engine manufacturer? for instance a .46 2C engine required 11x6 prop, what if we use 10x5 in it, and a .61 2C size engine required 11x7 and we use 10x6? what would be the disadvantage or difference? would it not give enough power? or would it make engine hot despite running rich? and smaller size prop then recommended prop would damage the engine if used.

In addition to it another question is why Bench Props for breaking in are different in sizes for any engine? why after broken in one has to change the prop size from the one which was used in break-in?


Thanks to all in advance

Mody