---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Thu 06/19/14: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:45 PM - 582 Engine Vibration on Mark III - Problem Found (Kolb List) 2. 03:39 PM - Re: 582 Engine Vibration on Mark III - Problem Found (George Alexander) 3. 06:22 PM - Re: Re: 582 Engine Vibration on Mark III - Problem Found (kinne russ) 4. 07:16 PM - Re: Tail Wheel Mark IIIC (pipercolt) 5. 07:20 PM - Looking for a Kolb Slingshot for sale, flying aircraft / Kit (speeddemon651) ________________________________ Message 1 _____________________________________ Time: 02:45:34 PM PST US From: "Kolb List" Subject: Kolb-List: 582 Engine Vibration on Mark III - Problem Found Many thanks to all of you who responded with tips on troubleshooting. ' much appreciated. The source of the vibration appears to be a huge crack in the one of the large triangular shaped prop hub plates on the 3 blade Warp Drive prop (the plates that support each individual propeller blade front and back). It wasn't immediately noticeable because of it being the plate on the gearbox side. The crack propagated from one edge of the plate, through the center and within a half inch of the other side. So one prop blade was probably within moments of departing the aircraft. I have never heard of this happening on a Warp Drive prop. The prop has 519 hours on it. It was torqued at installation to the recommended 175 in lbs, and each blade to the recommended 120 in lbs. To my knowledge, the prop has never struck anything. None of the blades have ever been repaired. Warp Drive is closed today, but intend to follow-up with them tomorrow. Again, thanks to all who responded to my request for any troubleshooting tips. It is great to have this forum to share ideas. Gary Original Message: Hoping some of you fellow Kolbers have some troubleshooting ideas. One a recent flight, the 582 engine on our Mark III suddenly went from being the usual silky smooth to instant roughness/vibration - almost as if something suddenly broke. We managed to get it back to the home airport about 13 miles away. The whole airframe was shaking, but the engine seemed to be developing full power. Switching from one ignition source to the other had no effect. The engine monitor indicated CHT and EGT to be nearly the same on both cylinders and within the normal range. I've since changed spark plugs, removed both carbs for disassembly, cleaning and inspection. I completely drained the fuel system and put fresh premium alcohol free fuel in. All has had no effect on the vibration. Engine mounts appear to be OK - not broken. The engine develops full power, but still shakes badly. Prop is visually OK. Would appreciate any tips on what to check next. The next step planned is a compression check. Thanks. Gary ________________________________ Message 2 _____________________________________ Time: 03:39:29 PM PST US Subject: Kolb-List: Re: 582 Engine Vibration on Mark III - Problem Found From: "George Alexander" Gary: A very similar (if not identical thing) happened to the fellow (Randy) who flew with Arty Trost from Oregon to SnF and back in 2009. As I recall, he was enroute and it got serious somewhere in the SW and he was in the process of swapping the engine (R582?) when he found the cracked plate as he removed the prop. Not sure if it was a Warp or not. (The part of how and where he got the replacement engine from was a whole separate story.) kolber3(at)atcyber.net wrote: > Many thanks to all of you who responded with tips on troubleshooting. much appreciated. The source of the vibration appears to be a huge crack in the one of the large triangular shaped prop hub plates on the 3 blade Warp Drive prop (the plates that support each individual propeller blade front and back). It wasnt immediately noticeable because of it being the plate on the gearbox side. The crack propagated from one edge of the plate, through the center and within a half inch of the other side. So one prop blade was probably within moments of departing the aircraft. I have never heard of this happening on a Warp Drive prop. The prop has 519 hours on it. It was torqued at installation to the recommended 175 in lbs, and each blade to the recommended 120 in lbs. To my knowledge, the prop has never struck anything. None of the blades have ever been repaired. Warp Drive is closed today, but intend to follow-up with them tomorrow. Again, thanks to all who responded to my request for any troubleshooting tips. It is great to have this forum to share ideas. > > Gary > > Original Message: > Hoping some of you fellow Kolbers have some troubleshooting ideas. One a recent flight, the 582 engine on our Mark III suddenly went from being the usual silky smooth to instant roughness/vibration almost as if something suddenly broke. We managed to get it back to the home airport about 13 miles away. The whole airframe was shaking, but the engine seemed to be developing full power. Switching from one ignition source to the other had no effect. The engine monitor indicated CHT and EGT to be nearly the same on both cylinders and within the normal range. Ive since changed spark plugs, removed both carbs for disassembly, cleaning and inspection. I completely drained the fuel system and put fresh premium alcohol free fuel in. All has had no effect on the vibration. Engine mounts appear to be OK - not broken. The engine develops full power, but still shakes badly. Prop is visually OK. Would appreciate any tips on what to check next. The next step planned is a compression check. Thanks. > > Gary > -------- George Alexander FS II R503 N709FS http://www.oh2fly.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=425148#425148 ________________________________ Message 3 _____________________________________ Time: 06:22:35 PM PST US Subject: Re: Kolb-List: Re: 582 Engine Vibration on Mark III - Problem Found From: kinne russ Now you've got us all curious! -- can you or he send us a short report? do not archive On Jun 19, 2014, at 6:39 PM, George Alexander wrote: > > Gary: > A very similar (if not identical thing) happened to the fellow (Randy) who flew with Arty Trost from Oregon to SnF and back in 2009. As I recall, he was enroute and it got serious somewhere in the SW and he was in the process of swapping the engine (R582?) when he found the cracked plate as he removed the prop. Not sure if it was a Warp or not. > (The part of how and where he got the replacement engine from was a whole separate story.) > > kolber3(at)atcyber.net wrote: >> Many thanks to all of you who responded with tips on troubleshooting. much appreciated. The source of the vibration appears to be a huge crack in the one of the large triangular shaped prop hub plates on the 3 blade Warp Drive prop (the plates that support each individual propeller blade front and back). It wasnt immediately noticeable because of it being the plate on the gearbox side. The crack propagated from one edge of the plate, through the center and within a half inch of the other side. So one prop blade was probably within moments of departing the aircraft. I have never heard of this happening on a Warp Drive prop. The prop has 519 hours on it. It was torqued at installation to the recommended 175 in lbs, and each blade to the recommended 120 in lbs. To my knowledge, the prop has never struck anything. None of the blades have ever been repaired. Warp Drive is closed today, but intend to follow-up with them tomorrow. Again, thanks to all who! > responded to my request for any troubleshooting tips. It is great to have this forum to share ideas. >> >> Gary >> >> Original Message: >> Hoping some of you fellow Kolbers have some troubleshooting ideas. One a recent flight, the 582 engine on our Mark III suddenly went from being the usual silky smooth to instant roughness/vibration almost as if something suddenly broke. We managed to get it back to the home airport about 13 miles away. The whole airframe was shaking, but the engine seemed to be developing full power. Switching from one ignition source to the other had no effect. The engine monitor indicated CHT and EGT to be nearly the same on both cylinders and within the normal range. Ive since changed spark plugs, removed both carbs for disassembly, cleaning and inspection. I completely drained the fuel system and put fresh premium alcohol free fuel in. All has had no effect on the vibration. Engine mounts appear to be OK - not broken. The engine develops full power, but still shakes badly. Prop is visually OK. Would appreciate any tips on what to check next. The next step planned ! > is a compression check. Thanks. >> >> Gary >> > > > -------- > George Alexander > FS II R503 N709FS > http://www.oh2fly.net > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=425148#425148 > > > > > > > > > > ________________________________ Message 4 _____________________________________ Time: 07:16:48 PM PST US Subject: Kolb-List: Re: Tail Wheel Mark IIIC From: "pipercolt" Hey Kurt I tried to email you at the address in your post but it was returned. Call me at 765-346-2622. Bob Read this topic online here: http://forums.matronics.com/viewtopic.php?p=425153#425153 ________________________________ Message 5 _____________________________________ Time: 07:20:18 PM PST US Subject: Kolb-List: Looking for a Kolb Slingshot for sale, flying aircraft / Kit From: "speeddemon651" Looking to buy a used Kolb Slingshot, flying aircraft or partially built kit or completely unbuilt kit. Let me know if you have one for sale. Send me a PM. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=425154#425154 ------------------------------------------------------------------------------------- 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.