---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Tue 05/31/11: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:31 AM - Static RPM Oddity (?) (John Fasching) 2. 01:56 PM - Re: Static RPM Oddity (?) (Roger Lee) ________________________________ Message 1 _____________________________________ Time: 09:31:26 AM PST US From: "John Fasching" Subject: RotaxEngines-List: Static RPM Oddity (?) I just reinstalled the hub "clamp" for my Sensenich composite ground adjustable prop on my RV-12 that had been "recalled" to machine it so it clamped the blades tighter (there were some reports of blade angle changing because they were not clamped enough). I was setting the blades to achieve about 5,000 static RPM when I noticed something that is not entirely clear to me: The 'speed' or haste used to go to full throttle affected the static rpm that was achieved. A rather good shove produced more top rpm than a slow methodical application of full throttle. I ended up doing ten 'runs' and averaging them to get the 5,010 rpm that I settled for on the Rotax 921ULS in the plane. I'm happy but not certain why the variabtion; my guess is that it has something to do with the fuel fed to the carbs, or into the combustion chambers. JohnF ________________________________ Message 2 _____________________________________ Time: 01:56:35 PM PST US Subject: RotaxEngines-List: Re: Static RPM Oddity (?) From: "Roger Lee" Most likely a throttle cable and or a throttle lever adjustment. Evidently something can stretch or even be pulled so much as to make a little 2-4mm change and that's all it would take. My guess is the change is so small you can't feel it, but does affect the carb. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center Home 520-574-1080 TRY HOME FIRST Cell 520-349-7056 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=341643#341643 ------------------------------------------------------------------------------------- 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.