It's not that manufacturers measure the pitch differently, it's that they make propellers with a different PROFILE. People tend to forget a very simple considerations: a propeller is an airfoil! Pitch and diameter are two factors of airfoil SIZE, but profile does count too!
I run a very, very thick profile propeller (the hub is about 12 centimeters / 5 inch thick), and because of that, it has little to do with most props given for the same diameter and pitch. The difference is not always that obvious when you put two props side by side, but there always are differences! Serge Vidal KR2 "Kilimanjaro Cloud" Paris, France "Brian Kraut" <[email protected]> Envoyé par : [email protected] 2005-02-09 02:33 Veuillez répondre à KRnet Remis le : 2005-02-09 02:35 Pour : "KRnet" <[email protected]> cc : (ccc : Serge VIDAL/DNSA/SAGEM) Objet : RE: KR> Re: props Different brands of props measure their pitch a little differently. I had a Props, Inc. 52-50 that would only turn 3,200 on a 2180. I switched to a Sterba 54-52 if I remember correctly and I picked up about 150 RPM, 5 MPH, and at least 100 FPM climb. I highly recommend that you call Ed Sterba. He is a master and he knows KRs very well. Anyway, if you uped the pitch of your current prop you would lower the RPM and probably loose a little speed and a lot of climb. The VW will produce more power in the 3,400 to 3,500 RPM range. I wouldn't increase pitch while only turning 3,300. Brian Kraut Engineering Alternatives, Inc. www.engalt.com -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of robert clark Sent: Tuesday, February 08, 2005 5:31 PM To: [email protected] Subject: KR> Re: props Looking for some input on props. What are you guys running. Iam currently running 52X50 on my 2180 V.W. I can turn it to 3300 and am getting 150 M.P.H. Just wondering if it would pay me to move up a couple in pitch. All take care Bob Clark Florida --------------------------------- Do you Yahoo!? Yahoo! Mail - Easier than ever with enhanced search. Learn more. _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to [email protected] please see other KRnet info at http://www.krnet.org/info.html _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to [email protected] please see other KRnet info at http://www.krnet.org/info.html
