I an getting ready to balance my Ziroli Hellcat and I have a Sachs 5.8 on it. I need some advice on what size prop and manufacturer they are using. It will weigh around 28lbs...am guessing, haven't actually weighed it..thanks for your help...Gerry.

Not sure on your specific 5.8 engine but a safe bet would be 24/10 or even a 26/10.

Which engine do you have?

HI Michael, Thanks for the advice..I have a Sachs 5.8. If I go with the 26x10 what RPM'S should I be looking for and with which prop manufactor do you think will give me the most all around performance? Thanks, Gerry

Gerry

The Sach's as you mention is most likely a Sachs cylinder/piston assembly built into an aero engine and or a Chainsaw engine converted to aero use. Do you know the manufacturer? Sachs/Mahle/Makita/Dahlmer and others are all of the same cylinder assembly manufacturer.

I would suggest a Menz S. There are many manufacturer's out there, many are built and offered for a variety of different applications.

Look for a maximum around 6500rpm. Anywhere between 5500-6500 should work fine without causing problems.

Is a Sachs Dahlmer...I agree with you Michael that that is a super prop. I am flying a 1/3 scale Cap 232 with the Zenoah twin 80 cc engine...I have always used Menz S props...they are a good deal I think...thanks again, Gerry