H20rrl

My Feedback: (43)

I have a ZDZ 80 and would like to know what size 3 bladed prop would go on it.Thanks for your help.

Gray Beard

My Feedback: (-1)

maybe you should go into the gas engine forum and ask you would get some quick answers. Don't forget to mention the plane and weight.

H20rrl

My Feedback: (43)

I already posted in gas engines and had no luck,so i came here.

Gray Beard

My Feedback: (-1)

General rule of thumb on going from a two blade to a 3 is down one inch in length and up one inch in pitch. Always seems to work correctly. Don't know why the gas guys didn't reply??

H20rrl

My Feedback: (43)

Well Hell thats easy enough to remember.Thank you.

loser

My Feedback: (37)

???....no disrespect but I think you are talking about keeping the same approx load on the engine when using the same number of BLADES. Going from a 2 blade 28x10 would have approx the same load as a 2 blade 26x12.....etc.

When adding a blade I think you need to drop the dia and pitch a bit further. I run mainly 100-111 cc twins. If I change from a 28x10 2 blade I usually wind up using a 25x10 or so 3 blade to get the approx same load/performance.

If no one responded on here you may wanna try the "Flying G's"" site....

H20rrl

My Feedback: (43)

Thank you