Re: Engine - Prop Combo...

Depends, which OS .61 do you have? Two-stroke? Four-Stroke. Recent 
manufacture? Old? Which model?

Ed Cregger


"rich" <cwo4cno7325@[EMAIL PROTECTED]
> wrote in message 
news:767d66d8-7876-4981-bbab-0c9e1e76bb01@[EMAIL PROTECTED]
> Hi All,
>
>   Still working on a Senior Telemaster, and am planning on using an
> OS-61 for power.  After getting the wing mounted on the fuze, I'm
> wondering if a .61 is big enough?  Anyway, my question is how big a
> prop can I use.  Prior plane was a 60 size trainer, and I used a 12x6
> prop, and it seemed to work ok.  Do you think I can use a 13x5 on this
> plane/engine combo???  12 x 6 = 72, and 13 x 5 =  65 so power seems
> about the same.  I'm looking for take-off performance, not top speed.
> Maybe even a 14x5 if I found one?????  Can you go too far with this?
>
> Thanks for any input.