---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Tue 04/09/19: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:39 PM - 277 keeps falling off the pipe (Richard Pike) ________________________________ Message 1 _____________________________________ Time: 06:39:29 PM PST US Subject: Kolb-List: 277 keeps falling off the pipe From: "Richard Pike" Situation: the Firefly now has a different Rotax 277 on it, 2.58:1 reduction and a 62" two blade Ivoprop. Engine runs great, all the numbers are good, but it won't stay stable on the pipe. It will run stabily at 5700 or above, but as soon as you retard the throttle even a little, it slowly reduces the rpm's to 4700 and then stabilizes. Give it a hair of throttle and it begins to slowly increase rpm and stabilizes again back at at 5700. Years ago I had a Rotax 532 on my MKIII that would do the same thing because it was overpropped with a three blade 64" Ivo. Removed one of the blades and it would then stabilize pretty well at most any rpm. So the question is this - anyone else have a similar experience with a 2-stroke engine that kept falling off/climbing back up the pipe, and if so, did you cure it by reducing the prop length/prop load? I would like some confirmation/reassurance/feedback before I start shortening the prop. -------- Richard Pike Kolb MKIII N420P (420ldPoops) Kolb Firefly Part 103 legal (Ready for a test flight on the new 277) Kingsport, TN 3TN0 Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=488650#488650 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message kolb-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Kolb-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/kolb-list Browse Digests http://www.matronics.com/digest/kolb-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.