Was looking at these Vess props on the DA site. There is no pitch given, but only a letter designation. A , B , etc.. My guess would be these have different pitches like a 16x8-10 that have seen before. That's a guess though, what is the deal with these, and how do you know which one to buy?


Thanks, david

"A" is 8" pitch and :"B" is 10" pitch on the 22" dia props. I have a pitch measuring device.

The deal is they have a tapered pitch so that it has more pitch inboard where the power is created and less at the tips but yes, the approximations W8ye are correct.

It is quite a simple system.
Yes they do have a varying pitch but to use the designations, it is basically this.

a "B" Pitch is the most common pitch used on that diameter prop. The "A" is finer and the "C" is more coarse.

So as w8ye mentioned.

in a 22" a "22/8" is the most common so a 22 "B" equates to a 22/8. a 22 "A" equates to a 22/6 and a 22 "C" equates to a 22/10.

However on a 28" prop, the "B" would be a 28/10 equivalent etc.

These figures are not exactly that simple as Robert (Vess) takes engine load and prop performance into account when he designates them.

It is on the "Tech Info" page here [link]http://www.vessaero.com/[/link]

I have a Vess 22 "B" and it is a 10" pitch everywhere I've measured it. So I use it on my G-62

A guy at the field has a BME 50 and he uses a Vess 22 "A" and it flys like it has a 8" pitch but I've never measured it. The engine even turns the same rpm it did with a Zoar 22 X 8.

Thanks for the explaination guys! Sorry I I did not say so sooner.

David