Re: Engine - Prop Combo...

61 is plenty for this plane.  Your instinct on propeller sizes sounds 
about right.  If I were you I'd procure a few different sizes and try 
them all.  Propping this plane for speed won't do a lot of good because 
it just doesn't need it, and then it will have trouble landing.  In 
either case it will climb well because it's so light and a 61 can't help 
but drag the plane around.  I don't think you'll go to far wrong in 
either direction.


rich wrote:
> 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.