---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Fri 04/27/07: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:59 AM - Re: Maximum Continuous RPM for a Rotax 503 (Thom Riddle) ________________________________ Message 1 _____________________________________ Time: 04:59:15 AM PST US From: Thom Riddle Subject: Re: RotaxEngines-List: Maximum Continuous RPM for a Rotax 503 Lee, No. The RPM limitations that Rotax put on their engines do not care what prop you use and they do not change based on what prop you are using. They are absolute numbers that refer to limits that the engine components are designed for. It means your engine can develop only 6200 rpm (assuming this is at wide open throttle in straight and level flight) because there is a bit too much load on it from the high pitch propellor. This is good for economical low density altitude cruise flight as long as your EGTs are in normal range. But not good for high altitude operation or for extended climb perhormance. At 6200 RPM your engine is not developing its full power and the power it does produce will drop as you climb into thinner air and you will probably see the max rpm drop even further as you climb. If your engine is turning 6200 rpm at best climb speed that is another story and the pitch is probably about right. For high altitude flight, if you have a ground adjustable prop, it would be good to set the pitch to get close to 6700-6800(max) rpm in straight and level flight at low altitudes. Thom in Buffalo ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.