---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Tue 12/29/20: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:48 PM - Going to a 72" prop (Richard Pike) 2. 10:49 PM - Re: Going to a 72" prop (TheWanderingWench) ________________________________ Message 1 _____________________________________ Time: 03:48:46 PM PST US Subject: Kolb-List: Going to a 72" prop From: "Richard Pike" Still thinking about upgrading my Kolb MKIII, planning to go from a 68" Ivo to a 72" Warp Drive prop, will need to raise the engine so the prop will clear the boom tube. The attached picture shows the typical / normal Lord shock mount method of attachment between the airframe and the motor mount plate. One easy way to gain more prop clearance is to flip the Lord mounts over, they are 1" taller one way than the other, but I have never seen anybody do that. Is there a reason why this is not a good idea? -------- Richard Pike Kolb MKIII N420P (420ldPoops) Kolb Firefly Part 103 legal 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=499890#499890 Attachments: http://forums.matronics.com//files/lordmounts_127.jpg ________________________________ Message 2 _____________________________________ Time: 10:49:00 PM PST US From: TheWanderingWench Subject: Re: Kolb-List: Going to a 72" prop Richard -=C2- Several years ago I put a longer prop on my Maxair Drifter. Like the Kolb, the Drifter is a taildragger pusher with a long, low boom. I made sure that there was plenty of clearance between prop and boom, and took it for a tes t flight. It was pretty gusty, and when I landed I bounced fairly hard. Wha t I hadn't counted on was the amount of flex in the boom with a hard landin g.=C2- The occasional hard landing hadn't ever caused any problems in the past; in this case, the ending wasn't pretty. Unlike the strut-braced Kolb, the Dri fter has wires. The boom flex caused the prop to go through the wires, whic h caused other mayhem.=C2- I ended up having to truck the Drifter to a fr iend's airport and get it rebuilt.=C2- So - although you don't have any wires, and even though you may not do hard landings any more - you might want to build boom flex into your considerat ions about how much longer a prop to put on your Kolb. You've got an incredible number of experienced Kolb pilots on this list - ( and I have no Kolb experience at all) - so my experience might have no rele vance for a Kolb MKIII.=C2- Arty TrostSandy, Oregon "I refuse to tip toe through life just to arrive safely at death." On Tuesday, December 29, 2020, 03:54:49 PM PST, Richard Pike wrote: Still thinking about upgrading my Kolb MKIII, planning to go from a 68" Ivo to a 72" Warp Drive prop, will need to raise the engine so the prop will c lear the boom tube.=C2- The attached picture shows the typical / normal Lord shock mount method of attachment between the airframe and the motor mount plate. One easy way to gain more prop clearance is to flip the Lord mounts over, t hey are 1" taller one way than the other, but I have never seen anybody do that. Is there a reason why this is not a good idea? -------- Richard Pike Kolb MKIII N420P (420ldPoops) Kolb Firefly Part 103 legal 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=499890#499890 Attachments: http://forums.matronics.com//files/lordmounts_127.jpg S - WIKI - - =C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin. ------------------------------------------------------------------------------------- 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.