Gas engine and prop combo
08-01-2011, 01:01 AM
#1
Thread Starter
Join Date: Aug 2005
Location: Mississauga,
ON, CANADA
Posts: 4,196
Likes: 0
Received 1 Like
on
1 Post
Gas engine and prop combo
I have Sach 4.2 70cc gas engine on my Bud Nosen P-51B Mustang, it's recommended prop size is 24x10.
What i like to know, how 23x8 wide blade prop will perform on this engine?
Would i be able to fly my Mustang with this prop or not?
Similar question goes for 20x10 prop just to test the engine on the ground, not flying, what kind or RPMs will i see on this engine
OR
using smaller prop should not be used on this engine..
Sam
What i like to know, how 23x8 wide blade prop will perform on this engine?
Would i be able to fly my Mustang with this prop or not?
Similar question goes for 20x10 prop just to test the engine on the ground, not flying, what kind or RPMs will i see on this engine
OR
using smaller prop should not be used on this engine..
Sam
08-01-2011, 03:37 AM
#2
RE: Gas engine and prop combo
Sounds like a similar load. If you have the prop, mount it and try it with a tach. Your airplane won't explode on the ground. Lower pitch wont be as fast on the top end and I'd say if I were flying a 3D plane of a simlar weight I'd try the smaller prop but stick with the higher pitch prop for a warbird, but the only way to tell the proper engine/prop combination for a particular plane and flying style, is to fly it and see
08-01-2011, 08:02 AM
#3
Join Date: Jul 2005
Location: Jacksonville, FL
Posts: 4,865
Likes: 0
Received 0 Likes
on
0 Posts
RE: Gas engine and prop combo
I have a couple of 50CC that recommend a 23x10....seems to me that a 23 on a 70CC might be under proped making a lot of prop noise. You 'd probably get more pull and speed with the bigger diameter prop....Do you have the ground clearence?
