---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Wed 04/29/09: 10 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:52 AM - noise (Ted Cowan) 2. 07:08 AM - Re: noise (John Hauck) 3. 09:25 AM - Re: Monument Valley (Kirby, Dennis CTR USAF AFMC MDA/AL) 4. 10:11 AM - Re: Re: Monument Valley (pj.ladd) 5. 10:39 AM - Re: Re: Monument Valley (zeprep251@aol.com) 6. 12:19 PM - Jabiru Powered MKIII (Richard & Martha Neilsen) 7. 05:17 PM - Re: Jabiru Powered MKIII (zeprep251@AOL.COM) 8. 06:39 PM - Re: Re: props (Brad Stump) 9. 08:34 PM - Vidalia AirShow - Kids ! (possums) 10. 10:03 PM - Re: Jabiru Powered MKIII (ces308) ________________________________ Message 1 _____________________________________ Time: 02:52:52 AM PST US From: "Ted Cowan" Subject: Kolb-List: noise Just for the record, many, many people hear this noise, not just me in the cabin. It starts on the ground at about 2500 rpm and really makes itself known by the time you get to 4000. On the ground, in the air, everywhere, its there. By the time you get to around 4800 or more in the air, you cannot stand it without the ANR set. Sounds like five o'clock charlie in the MASH series. Everyone knows it is me from over five miles away. Great Kolb Airship, fun to fly, will do anything, zoom zoom but -- the nastiest sound around. end. ted cowan, alabama, slingshot, 912 ul ________________________________ Message 2 _____________________________________ Time: 07:08:58 AM PST US From: "John Hauck" Subject: Re: Kolb-List: noise > Just for the record, many, many people hear this noise, not just me in the > cabin. ted cowan, alabama, slingshot, 912 ul Ted had his SS at last year's Kolb Homecoming. When he flew, the noise was loud and easily heard even by a deaf guy. Sounded just like the noise Ronny Collin's SS was making when powered by a 582 and a 3 blade fast taper Warp Drive Prop. When I flew Ronny's SS the noise and vibration were very evident. Didn't make much difference what I did, the noise and vibration remained. It was reduced only when throttle was retarded. After I landed I suggested Ronny fly the SS and let me fly his wing to see if I could see anything abnormal about his SS. We did and I did discover the fabric on the top inboard rear of the right wing ballooning. Builder had rib stitched rather than use fabric rivets. The rib stitching was pulling loose. Ronny used fabric rivets to repair the right wing and also riveted the left wing in the same area. Test flight resulted in harmonic noise and vibration had disappeared, never to return. This SS was also at the Kolb Homecoming 2008. Unlike Ted, Ronny had good quality blades. john h mkIII ________________________________ Message 3 _____________________________________ Time: 09:25:36 AM PST US Subject: Kolb-List: Re: Monument Valley From: "Kirby, Dennis CTR USAF AFMC MDA/AL" Rick Neilsen wrote: << It sounds like a good turn out for Monument Valley this year wish I could make it again this year but it isn't going to happen. >> Aw, C'mon, Rick - Somebody's drifting Drifter needs a target to aim for on the runway's edge! ;-) Dennis Kirby Do not archive ________________________________ Message 4 _____________________________________ Time: 10:11:55 AM PST US From: "pj.ladd" Subject: Re: Kolb-List: Re: Monument Valley quiet Jabiru powered MKIIIC a few months ago.>> QUIET! How did that happen? I haven`t found a quiet pusher configuration of ANY plane yet. Pat ________________________________ Message 5 _____________________________________ Time: 10:39:10 AM PST US Subject: Re: Kolb-List: Re: Monument Valley From: zeprep251@aol.com That was my reaction when Rick used that word.Although he did qualify it. G.Aman -----Original Message----- From: pj.ladd Sent: Wed, 29 Apr 2009 1:03 pm Subject: Re: Kolb-List: Re: Monument Valley ?quiet Jabiru powered MKIIIC a few months ago.>> ? QUIET! How did that happen? I haven`t found a quiet pusher configuration of ANY plane yet. ? Pat ? ? ________________________________ Message 6 _____________________________________ Time: 12:19:34 PM PST US From: "Richard & Martha Neilsen" Subject: Kolb-List: Jabiru Powered MKIII Yes Quiet. I have flown in Kolb MKIIIs with a Rotax 503, 582, 912(80hp), 912 (100hp), Jabiru and my VW. The two stroke Rotaxs were open out the back and my ears are still ringing from them. The overworked air-cooled 503 was far and away the worst on my ears. Fat Albert with the 80hp Rotax, open cockpit was also noisy and its high RPM engine just gets to you more. John H. has the 912 100HP and it was the most quiet. It is likely that his big fuel tank between the engine and your ears tends to dampen the vibration/noise. My current VW is somewhere close to a open cockpit 912 but the lower frequency is easer to deal with. My VW high mount that had real soft vibration dampers and it was the most quiet MKIII I have ever flown in. The Jabiru has a much slower turning engine even slower than my VW and it would appear that the vibration dampers were well tuned to stop quite a bit of the noise producing vibrations. The lower frequency noises produced by the Jabiru are also much easer to filer out with available ANR headsets. It is a airplane and noise is a normal condition so yes the Jabiru is a close runner up for the most quiet Kolb MKIII. I have been looking for softer vibration dampers (bushing) for my VW but haven't found anything yet. This appears to be the most noticeable element in a quiet cockpit. It also reduces the stress on the airframe. Rick Neilsen Redrive VW powered MKIIIC ----- Original Message ----- From: zeprep251@aol.com To: kolb-list@matronics.com Sent: Wednesday, April 29, 2009 1:35 PM Subject: Re: Kolb-List: Re: Monument Valley That was my reaction when Rick used that word.Although he did qualify it. G.Aman -----Original Message----- From: pj.ladd To: kolb-list@matronics.com Sent: Wed, 29 Apr 2009 1:03 pm Subject: Re: Kolb-List: Re: Monument Valley quiet Jabiru powered MKIIIC a few months ago.>> QUIET! How did that happen? I haven`t found a quiet pusher configuration of ANY plane yet. Pat ------------------------------------------------------------------------- ----- Can't afford a new spring wardrobe? Go shopping in your closet instead! ________________________________ Message 7 _____________________________________ Time: 05:17:11 PM PST US Subject: Re: Kolb-List: Jabiru Powered MKIII From: zeprep251@AOL.COM Rick, ??? You know how sensitive the squelch was on the intercom? Well after talking to David Clark,I was informed that there is a mic gain control on these old headsets.After removing the foam mic cover the adjusting screw was visible .A half turn made so much difference I couldn't believe it.Even take off power can't trip the vox and the cockpit com is much improved.I'm a happy camper!These headsets are 29 years old! ???? You are gonna take some heat on that Quiet claim,but thanks for the effort! ????????????????????????? G.Aman MK-C Jabiru 2200, now comfortably in touch with the right seat! ??????????? -----Original Message----- From: Richard & Martha Neilsen Sent: Wed, 29 Apr 2009 3:19 pm Subject: Kolb-List: Jabiru Powered MKIII Yes Quiet. ? I have flown in Kolb MKIIIs with a Rotax 503, 582, 912(80hp), 912 (100hp), Jabiru?and my VW. The two stroke Rotaxs were open out the back and my ears are still ringing from them. The overworked air-cooled 503 was far and away the worst on my ears.?Fat Albert with the 80hp Rotax, open cockpit was also noisy and its high RPM engine just gets to you more. John H. has the 912 100HP and it was the most quiet. It is likely that his big fuel tank between the engine and your ears tends to dampen the vibration/noise. My current VW is somewhere close to a open cockpit 912 but the lower frequency is easer to deal with.?My VW high mount that had real soft vibration dampers?and it was the most quiet MKIII I have ever flown in.?The Jabiru has a much slower turning engine even slower than my VW and it would appear that the vibration dampers were well tuned to stop quite a bit of the noise producing vibrations. The lower frequency noises produced by the Jabiru are also much easer to filer out with available ANR headsets. It is a airplane and noise is a normal condition so yes the Jabiru is a close runner up for the most quiet Kolb MKIII. ? I have been looking for softer vibration dampers?(bushing) for my VW?but haven't found anything yet. This appears to be the most noticeable element in a quiet cockpit. It also reduces the stress on the airframe. ? Rick Neilsen Redrive VW powered MKIIIC ----- Original Message ----- From: zeprep251@aol.com Sent: Wednesday, April 29, 2009 1:35 PM Subject: Re: Kolb-List: Re: Monument Valley That was my reaction when Rick used that word.Although he did qualify it. G.Aman -----Original Message----- From: pj.ladd Sent: Wed, 29 Apr 2009 1:03 pm Subject: Re: Kolb-List: Re: Monument Valley ?quiet Jabiru powered MKIIIC a few months ago.>> ? QUIET! How did that happen? I haven`t found a quiet pusher configuration of ANY plane yet. ? Pat ? ? Can't afford a new spring wardrobe? Go shopping in your closet instead! href="http://www.matronics.com/Navigator?Kolb-List">http://www.matronics.com/Navigator?Kolb-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c ________________________________ Message 8 _____________________________________ Time: 06:39:07 PM PST US From: Brad Stump Subject: RE: Kolb-List: Re: props I have a Keiv prop on MK3X,with a Hirth 70hp,two weeks ago the water belt cover went through the prop,loud thunk,precautionary landing,skint place on one blade,flew it home,ordered and replaced the cover after drilling holes in it for safety wire,still flying.Iam satisfied with my prop. > -----Original Message----- > From: orcabonita@hotmail.com > Sent: Mon, 27 Apr 2009 10:56:39 -0700 > To: kolb-list@matronics.com > Subject: Kolb-List: Re: props > > > > HShack(at)aol.com wrote: >> >> He especially likes the toughness of the Kiev, as he has close to 1,000 >> water takeoffs w/ that prop [float-plane props take a beating from the >> spray]. >> >> > > > The Kiev has nickel leading edge plating, as does the Warp Drive, this > makes it suitable for flying in Rain, Floats, where water would be > hitting the leading edge. Either prop would be fine on floats. This > does NOT make the Kiev a tough prop, to the contrary, the Kiev is very > light and fragile. For mounting on a pusher Kolb MK III, you need a very > strong prop capable of staying together when a foreign object goes > through it, not one that is ONLY resistant to water spray. > > Look at the picture below, putting 100 HP into that narrow aluminum prop > spacer is not something I was comfortable with. My Warp Drive prop has a > much bigger mounting bolt pattern and much larger diameter spacer. Both > the Hub and Prop blades are extremely light, definitely not what I want > considering the strong power pulses of the Rotax 912. But if anyone > wants a good, slightly used Kiev Prop for a Rotax 912, I have one for > sale !!! As much as I would like to sell this prop and get back some of > the money I paid for it, I am not the type of person that would sell > something that might get someone hurt in their Kolb just so that I can > profit. If anyone wants to buy this prop, they will get my honest > opinion about and its potential hazards first. > > Mike > > -------- > "NO FEAR" - If you have no fear you did not go as fast as you > could have !!! > > Kolb MK-III Xtra, 912-S > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=241477#241477 > > > > > Attachments: > > http://forums.matronics.com//files/ultralightmikekolbpropspacer12_19_2006_44_659.jpg > > > > ________________________________ Message 9 _____________________________________ Time: 08:34:35 PM PST US From: possums Subject: Kolb-List: Vidalia AirShow - Kids ! At 11:07 PM 4/28/2009, you wrote: > >Its no wonder society is going to shit, kids like that generally >grow up to be trashy, very self centered, rude adults. The lack of >rules and discipline is very evident in the airline business, were >people throw child like tantrums because they are required to follow >some very simple and necessary safety rules. Got a Fly-in. Got kids running around. Got props turning. Those little rascals and props don't mix well. Have you ever seen what a kid can do to a $600 prop -me let me tell - you it ain't pretty and WD ain't gonna send you a new one when they find out what happened. Don't ask me how I know. ________________________________ Message 10 ____________________________________ Time: 10:03:32 PM PST US Subject: Kolb-List: Re: Jabiru Powered MKIII From: "ces308" What??? Am I reading this right??? lol What about the JABIRU?? chris ambrose M3X-Jabiru N327CS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=242023#242023 ------------------------------------------------------------------------------------- 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.