CF Props

[C-Mac]

Hi All,

I am having a small debate with a friend on CF props. I have read they are great and hold up but there are also threads about CF props blowing up. What would be the reasons a CF prop would break/blow up, what kind of speeds can you get out of a CF prop and other than price what are the pro's and con's?

Any and all input is very helpful.
Thanks C-Mac

[Steven Vaccaro]

The only time I've seen carbon props break is when they hit something or someone is trying to turn extremely high rpm with them. I've run them successfully in racing and playing for many years with boats that turn about 20k-30k.

[ED66677]

it seems thay blow off above 35K
if you are trying to set up and fine tune a boat stay with CF props as they are cheap are almost ready to use, if you want to get the maximum speed, once you know the size of prop you need, go for a metal one, you will gain few mph then.

[ED66677]

double post sorry

[CornelP]

I tested the theory over the weekend on my 650mm mono: 68kph with a Graupner Carbon 45mm and 72 on an unbalanced (but polished and sharp) H&M.

[Steven Vaccaro]

it seems thay blow off above 35K
if you are trying to set up and fine tune a boat stay with CF props as they are cheap are almost ready to use, if you want to get the maximum speed, once you know the size of prop you need, go for a metal one, you will gain few mph then.

I agree.

I would also add that if a person is experienced enough to run 35,000 rpm or more, they should be able to balance a metal propeller.