---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Sun 03/21/21: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:25 AM - Re: Re: Prop pitch? (George Helton) ________________________________ Message 1 _____________________________________ Time: 04:25:54 AM PST US From: George Helton Subject: Re: Kolb-List: Re: Prop pitch? Hi Richard, it sounds like your pretty close to me. I would expect that increase in EGT at throttle back between 4800 and 5000 rpm.( to be avoided.) Some Rotax engines have that lean spot at reducing power after having been run at high power settings. Your static pull sounds pretty close as does you climb out rpm sounds good. I would suggest raising your carb needles maybe one notch and installing your muffler for a little back pressure. Actually Id just install the muffler and try it again. Im not much on multiple adjustments at one time. George Sent from my iPhone > On Mar 20, 2021, at 8:39 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 > > > > > > > > > ------------------------------------------------------------------------------------- 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.