---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Tue 11/02/10: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:15 PM - 4 blade prop - Rick Girard (Jimmy Young) 2. 05:50 PM - Re: 4 blade prop - Rick Girard (Richard Girard) ________________________________ Message 1 _____________________________________ Time: 05:15:50 PM PST US Subject: Kolb-List: 4 blade prop - Rick Girard From: "Jimmy Young" Rick, I noticed while I was culling through the non-Kolb related discussions of the last two days that you have a 4-bladed prop with a 4-1 redrive. Just curious, what is the length on that prop, the manufacturer, and what was the reason you went with it? Did you ever have a 2 or 3 blade prop on the same engine/plane? I'm asking to learn, not trying to be critical in any way. -------- Jimmy Young Missouri City, TX Kolb FS II/HKS 700 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=317922#317922 ________________________________ Message 2 _____________________________________ Time: 05:50:21 PM PST US Subject: Re: Kolb-List: 4 blade prop - Rick Girard From: Richard Girard I bought my plane from a couple of helicopter instructors at Ft Rucker in Alabama and it came with a three blade 68" WD with tapered blades. When those blades were damaged by contacting the flap bell cranks hitting the face of the prop blades I decided to step back to a 66" diameter as recommended in the plans and did not get the new blades tapered. I also acquired a two blade hub off eBay and tried that for about a day, but didn't like the vibration level and went back to the three blade. That is what I have on the Kolb at this time. On my HKS powered trike I have a 68" four blade Powerfin with "F" blades. I have the 3.45 gearbox on that engine. Very quiet, especially when I keep the engine throttled back when I'm flying with the big wing on. I rarely run the engine faster than 4900 RPM in cruise with that wing. I haven't tried the Powerfin with the Kolb yet, although I'd like to before I put the plane up for the winter, mostly because the folks at WD tell me the one I have is completely wrong for my engine / gearbox combo. So now I'm wondering if there is some performance to be had with more blade area and I'm lucky enough to have a prop I can try without having to spend any money to do it. So the most I can tell you at this time is that I'll let you know how it works out. Rick On Tue, Nov 2, 2010 at 7:13 PM, Jimmy Young wrote: > > Rick, > > I noticed while I was culling through the non-Kolb related discussions of > the last two days that you have a 4-bladed prop with a 4-1 redrive. Just > curious, what is the length on that prop, the manufacturer, and what was the > reason you went with it? Did you ever have a 2 or 3 blade prop on the same > engine/plane? I'm asking to learn, not trying to be critical in any way. > > -------- > Jimmy Young > Missouri City, TX > Kolb FS II/HKS 700 > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=317922#317922 > > -- Zulu Delta Kolb Mk IIIC 582 Gray head 4.00 C gearbox 3 blade WD Thanks, Homer GBYM It is not bigotry to be certain we are right; but it is bigotry to be unable to imagine how we might possibly have gone wrong. - G.K. Chesterton ------------------------------------------------------------------------------------- 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.