Eagler's Nest

Engines => 4 Cylinder => Certified based => Topic started by: Cessna4542c on February 15, 2018, 11:27:26 AM

Title: Propeller selection
Post by: Cessna4542c on February 15, 2018, 11:27:26 AM

 I seen it somewheres on the web of how to select a propeller for my double eagle. I will be using a Lycoming 65 horse. 2550 maximum rpm’s and I have 60 inches to work with for prop diameter. My question is, what kind of pitch should the prop have.  There must be some kind of calculator on the web. I seen it but I can’t seem to find it anymore.

Title: Re: Propeller selection
Post by: Dan_ on February 15, 2018, 06:51:43 PM

Here is some reading on the subject... (https://www.google.com/search?ei=uEaGWqmJPIL4zgKIs7yoBQ&q=aircraft+prop+calculator&oq=aircraft+prop+calculator&gs_l=psy-ab.3..0j0i5i30k1j0i8i30k1l4.19947.22272.0.22766.9.9.0.0.0.0.212.1262.0j8j1.9.0....0...1c.1.64.psy-ab..0.9.1254...0i13k1j0i7i30k1j0i8i7i30k1j0i7i5i30k1j0i13i30k1.0.OcckV8qGdQg)

Title: Re: Propeller selection
Post by: PropMan on February 15, 2018, 08:45:08 PM

32" of pitch should work good for the DE. At 2550RPM you should see 75 mph or so. 

The problem is 60" diameter, to take full advantage of the low RPM engine i would recommend extending you landing gear and possibly raise the thrust line a bit. The props i make for VW powered DEs are typically 60-62" dia. And the VW turns up to 3600RPM

 Call me if you have any questions.
Frank
713-417-2519