---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Sat 03/20/21: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:37 PM - Re: Prop pitch? (Richard Pike) 2. 06:03 PM - Re: Re: Prop pitch? (Larry Cottrell) ________________________________ Message 1 _____________________________________ Time: 05:37:58 PM PST US Subject: Kolb-List: Re: Prop pitch? From: "Richard Pike" Finally got everything together and flew this afternoon. WOW! The 72" prop and 3.47:1 ratio really accelerates! Still got some things to sort out, with 13 degrees of pitch, static tied down was 6250, climbing out the prop loaded up a bit and was only turning 6000-6100. Egt's were good, pulled back to 54-5500 rpm cruise, egt's were good. Repitched the prop to 12 degrees, climbout was 63-6400 rpm, climbing 1,000/min, but as soon as I reduced throttle to 5500, the EGT's went up to 1200 degrees. Eased the throttle back to around 5,000, went back and landed. My initial reaction is that the prop unloaded a bit much in cruise, which jacked the egt's, but first I'll go through the carbs and make sure that everything is like it's supposed to be. The wife says that it is remarkably quiet, and that is w/o the after muffler installed. -------- Richard Pike Kolb MKIII N420P (420ldPoops) 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=501045#501045 ________________________________ Message 2 _____________________________________ Time: 06:03:39 PM PST US From: Larry Cottrell Subject: Re: Kolb-List: Re: Prop pitch? Sounds as though you need to raise the needles, too lean. On Sat, Mar 20, 2021 at 6:39 PM Richard Pike wrote: > > Finally got everything together and flew this afternoon. WOW! The 72" prop > and 3.47:1 ratio really accelerates! > > Still got some things to sort out, with 13 degrees of pitch, static tied > down was 6250, climbing out the prop loaded up a bit and was only turning > 6000-6100. Egt's were good, pulled back to 54-5500 rpm cruise, egt's were > good. > Repitched the prop to 12 degrees, climbout was 63-6400 rpm, climbing > 1,000/min, but as soon as I reduced throttle to 5500, the EGT's went up to > 1200 degrees. Eased the throttle back to around 5,000, went back and landed. > > My initial reaction is that the prop unloaded a bit much in cruise, which > jacked the egt's, but first I'll go through the carbs and make sure that > everything is like it's supposed to be. > > The wife says that it is remarkably quiet, and that is w/o the after > muffler installed. > > -------- > Richard Pike > Kolb MKIII N420P (420ldPoops) > 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=501045#501045 > > -- *The older I get, the less tolerant I am of those who are intolerant of others.* *If you forward this email, or any part of it, please remove my email address before sending.* ------------------------------------------------------------------------------------- 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.