---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Thu 11/26/20: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:17 AM - Re: 3.47:1 gear box (Eugene Zimmerman) 2. 07:24 AM - Re: Kolb-List Digest: 3 Msgs - 11/25/20 (Ted Cowan) 3. 07:34 AM - Re: 3.47:1 gear box (Richard Girard) 4. 08:18 AM - Re: Re: Kolb-List Digest: 3 Msgs - 11/25/20 (Pfatchantz) 5. 10:07 AM - Re: 3.47:1 gear box (Rick Neilsen) 6. 07:37 PM - Re: 3.47:1 gear box (Richard Pike) ________________________________ Message 1 _____________________________________ Time: 07:17:26 AM PST US Subject: Kolb-List: Re: 3.47:1 gear box From: "Eugene Zimmerman" Richard, Im presently using a 4/1 ration E box on my Mark 3 with a 70 three blade IVO medium prop. My engine is a 670 rotax engine which I derated by lowering the compression ratio. The advantage of the deeper ratio is less prop noise from a slower turning prop. [/b] Read this topic online here: http://forums.matronics.com/viewtopic.php?p=499534#499534 ________________________________ Message 2 _____________________________________ Time: 07:24:08 AM PST US From: Ted Cowan Subject: Kolb-List: Re: Kolb-List Digest: 3 Msgs - 11/25/20 Had three blade warp taper tip on my blue head on my slingshot. Worked great. Replaced with 912 ul zoom zoom Sent from my iPhone > On Nov 26, 2020, at 1:44 AM, Kolb-List Digest Server wrote: > > * > > ================================================= > Online Versions of Today's List Digest Archive > ================================================= > > Today's complete Kolb-List Digest can also be found in either of the > two Web Links listed below. The .html file includes the Digest formatted > in HTML for viewing with a web browser and features Hyperlinked Indexes > and Message Navigation. The .txt file includes the plain ASCII version > of the Kolb-List Digest and can be viewed with a generic text editor > such as Notepad or with a web browser. > > HTML Version: > > http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 20-11-25&Archive=Kolb > > Text Version: > > http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 20-11-25&Archive=Kolb > > > =============================================== > EMail Version of Today's List Digest Archive > =============================================== > > > ---------------------------------------------------------- > Kolb-List Digest Archive > --- > Total Messages Posted Wed 11/25/20: 3 > ---------------------------------------------------------- > > > Today's Message Index: > ---------------------- > > 1. 03:40 PM - 3.47:1 gear box (Richard Pike) > 2. 05:19 PM - Re: 3.47:1 gear box (George Alexander) > 3. 08:21 PM - Re: 3.47:1 gear box (Richard Pike) > > > > ________________________________ Message 1 _____________________________________ > > > Time: 03:40:01 PM PST US > Subject: Kolb-List: 3.47:1 gear box > From: "Richard Pike" > > > My trusty old 582 is due for a full rebuild, and as part of the rebuild I have > been thinking of either trying to milk a couple more horsepower out of it via > some old 2-stroke polishing techniques, or maybe getting one of Rotax Rick's engines. > Either way, I will need either a C or an E gearbox. I have an opportunity to get > an E box for a good price, but it is 3.47:1 ratio. > I am in over my head. > I flew a friends MKIII several years ago with a 582 and that ratio, but I don't > remember what prop he had, how many blades, prop length, etc. > The gearbox is off a PPG/Trike rig and comes with a beat up 3 blade Warp Drive > prop, blades will probably need replacing. > Seems I remember hearing years ago that either the Ivo or the Warp does not like > turning slow with a LOT of pitch. > Anybody on the list using that ratio, and if so, what prop are you using and how > do you like it? > > -------- > 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=499526#499526 > > > ________________________________ Message 2 _____________________________________ > > > Time: 05:19:37 PM PST US > Subject: Kolb-List: Re: 3.47:1 gear box > From: "George Alexander" > > > > Richard Pike wrote: >> >> ..S..N..I..P.. >> >> Anybody on the list using that ratio, and if so, what prop are you using and > how do you like it? > > > Richard: > May not be a good comparison, but for what it is worth, pushing my R503, DCDI, > dual carb, I have a 'C' Box with the 3.47 ratio, driven by a Powerfin 3 Blade, > F Model, 68". > Have no complaints with this set up. > > -------- > George Alexander > FS II R503 > E-LSA N709FS > http://www.oh2fly.net > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=499528#499528 > > > ________________________________ Message 3 _____________________________________ > > > Time: 08:21:05 PM PST US > Subject: Kolb-List: Re: 3.47:1 gear box > From: "Richard Pike" > > > Thanks George, I am hoping that someone with a 3.47:1 reduction and a 68" three > blade prop on a 582 will chime in. > > -------- > 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=499530#499530 > > > > > > > > ________________________________ Message 3 _____________________________________ Time: 07:34:01 AM PST US From: Richard Girard Subject: Re: Kolb-List: 3.47:1 gear box Richard, The 582 on my MkIII runs through a "C" gearbox at 4.00:1. WOT gets me only 1500 prop rpm. I have the 3.47:1 gearbox on my HKS. I had a MkIIIX with an "E" gearbox with the conventional 2.62:1 gears. As I was swapping around props I was surprised to find that the difference in pitch going from the 4:1 to the 2.62 was only .2 degrees of pitch. I couldn't find that either ratio of gearbox worked better than another except in the category of noise. Swinging a large dia. prop at low rpm's makes for a noticeably quieter aircraft. Rick Virus-free. www.avg.com <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Wed, Nov 25, 2020 at 5:42 PM Richard Pike wrote: > > > My trusty old 582 is due for a full rebuild, and as part of the rebuild I > have been thinking of either trying to milk a couple more horsepower out of > it via some old 2-stroke polishing techniques, or maybe getting one of > Rotax Rick's engines. > Either way, I will need either a C or an E gearbox. I have an opportunity > to get an E box for a good price, but it is 3.47:1 ratio. > I am in over my head. > I flew a friends MKIII several years ago with a 582 and that ratio, but I > don't remember what prop he had, how many blades, prop length, etc. > The gearbox is off a PPG/Trike rig and comes with a beat up 3 blade Warp > Drive prop, blades will probably need replacing. > Seems I remember hearing years ago that either the Ivo or the Warp does > not like turning slow with a LOT of pitch. > Anybody on the list using that ratio, and if so, what prop are you using > and how do you like it? > > -------- > 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 i s > amazing. > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=499526#499526 > > =========== =========== =========== =========== =========== > > -- =9CBlessed are the cracked, for they shall let in the light.=9D Groucho Marx ________________________________ Message 4 _____________________________________ Time: 08:18:56 AM PST US From: Pfatchantz Subject: Re: Kolb-List: Re: Kolb-List Digest: 3 Msgs - 11/25/20 who got the Kolb Slingshot that was for sale in Charlottesville Va? 4500 dollars...Low time 503...de registered. Herb Sent with ProtonMail Secure Email. Original Message On Thursday, November 26, 2020 9:21 AM, Ted Cowan wrote: > > Had three blade warp taper tip on my blue head on my slingshot. Worked great. Replaced with 912 ul zoom zoom > > Sent from my iPhone > > > On Nov 26, 2020, at 1:44 AM, Kolb-List Digest Server kolb-list@matronics.com wrote: > > * > > > > ================================================= > > Online Versions of Today's List Digest Archive > > > > ================================================================================================= > > > > Today's complete Kolb-List Digest can also be found in either of the > > two Web Links listed below. The .html file includes the Digest formatted > > in HTML for viewing with a web browser and features Hyperlinked Indexes > > and Message Navigation. The .txt file includes the plain ASCII version > > of the Kolb-List Digest and can be viewed with a generic text editor > > such as Notepad or with a web browser. > > HTML Version: > > http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 20-11-25&Archive=Kolb > > Text Version: > > http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 20-11-25&Archive=Kolb > > > > =============================================== > > EMail Version of Today's List Digest Archive > > > > ============================================================================================= > > > > ---------------------------------------------------------- > > Kolb-List Digest Archive > > --- > > Total Messages Posted Wed 11/25/20: 3 > > ---------------------------------------------------------- > > > > > > Today's Message Index: > > > > ----------------------- > > > > 1. 03:40 PM - 3.47:1 gear box (Richard Pike) > > 2. 05:19 PM - Re: 3.47:1 gear box (George Alexander) > > 3. 08:21 PM - Re: 3.47:1 gear box (Richard Pike) > > > > > > ________________________________ Message 1 _____________________________________ > > Time: 03:40:01 PM PST US > > Subject: Kolb-List: 3.47:1 gear box > > From: "Richard Pike" thegreybaron@charter.net > > My trusty old 582 is due for a full rebuild, and as part of the rebuild I have > > been thinking of either trying to milk a couple more horsepower out of it via > > some old 2-stroke polishing techniques, or maybe getting one of Rotax Rick's engines. > > Either way, I will need either a C or an E gearbox. I have an opportunity to get > > an E box for a good price, but it is 3.47:1 ratio. > > I am in over my head. > > I flew a friends MKIII several years ago with a 582 and that ratio, but I don't > > remember what prop he had, how many blades, prop length, etc. > > The gearbox is off a PPG/Trike rig and comes with a beat up 3 blade Warp Drive > > prop, blades will probably need replacing. > > Seems I remember hearing years ago that either the Ivo or the Warp does not like > > turning slow with a LOT of pitch. > > Anybody on the list using that ratio, and if so, what prop are you using and how > > do you like it? > > > > 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=499526#499526 > > ________________________________ Message 2 _____________________________________ > > Time: 05:19:37 PM PST US > > Subject: Kolb-List: Re: 3.47:1 gear box > > From: "George Alexander" gtalexander@att.net > > Richard Pike wrote: > > > > > ..S..N..I..P.. > > > Anybody on the list using that ratio, and if so, what prop are you using and > > > how do you like it? > > > > Richard: > > May not be a good comparison, but for what it is worth, pushing my R503, DCDI, > > dual carb, I have a 'C' Box with the 3.47 ratio, driven by a Powerfin 3 Blade, > > F Model, 68". > > Have no complaints with this set up. > > > > George Alexander > > FS II R503 > > E-LSA N709FS > > http://www.oh2fly.net > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=499528#499528 > > ________________________________ Message 3 _____________________________________ > > Time: 08:21:05 PM PST US > > Subject: Kolb-List: Re: 3.47:1 gear box > > From: "Richard Pike" thegreybaron@charter.net > > Thanks George, I am hoping that someone with a 3.47:1 reduction and a 68" three > > blade prop on a 582 will chime in. > > > > 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=499530#499530 > ________________________________ Message 5 _____________________________________ Time: 10:07:50 AM PST US From: Rick Neilsen Subject: Re: Kolb-List: 3.47:1 gear box Rick/All I had a direct drive VW on my MKIIIC that had very poor performance. Switching to a reduction drive with a 1.6 to 1 reduction with a longer prop I got a considerable performance boost. Yes it got a lot quieter also. Consider that it takes HP to make noise. You may not be able to measure the difference in performance but It should be there somewhere. You also get more thrust accelerating a lot more air slowly than less air faster. Between the two my plane climbs faster, has a faster cruise, on less power with lower fuel consumption, lower oil and CHT temps. A bigger part of the equation might be prop diameter. I went from a two blade 66 to a 72" three blade. As usual, worth what you paid for it. Rick Neilsen Redrive VW Powered MKIIIC On Thu, Nov 26, 2020 at 10:36 AM Richard Girard wrote : > Richard, The 582 on my MkIII runs through a "C" gearbox at 4.00:1. WOT > gets me only 1500 prop rpm. I have the 3.47:1 gearbox on my HKS. I had a > MkIIIX with an "E" gearbox with the conventional 2.62:1 gears. As I was > swapping around props I was surprised to find that the difference in pitc h > going from the 4:1 to the 2.62 was only .2 degrees of pitch. I couldn't > find that either ratio of gearbox worked better than another except in th e > category of noise. Swinging a large dia. prop at low rpm's makes for a > noticeably quieter aircraft. > > Rick > > > Virus-free. > www.avg.com > > <#m_3214241089636315252_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > > On Wed, Nov 25, 2020 at 5:42 PM Richard Pike > wrote: > t >> > >> >> My trusty old 582 is due for a full rebuild, and as part of the rebuild I >> have been thinking of either trying to milk a couple more horsepower out of >> it via some old 2-stroke polishing techniques, or maybe getting one of >> Rotax Rick's engines. >> Either way, I will need either a C or an E gearbox. I have an opportunit y >> to get an E box for a good price, but it is 3.47:1 ratio. >> I am in over my head. >> I flew a friends MKIII several years ago with a 582 and that ratio, but I >> don't remember what prop he had, how many blades, prop length, etc. >> The gearbox is off a PPG/Trike rig and comes with a beat up 3 blade Warp >> Drive prop, blades will probably need replacing. >> Seems I remember hearing years ago that either the Ivo or the Warp does >> not like turning slow with a LOT of pitch. >> Anybody on the list using that ratio, and if so, what prop are you using >> and how do you like it? >> >> -------- >> 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=499526#499526 >> >> >> >> >> >> >> ========== >> -List" rel="noreferrer" target="_blank"> >> http://www.matronics.com/Navigator?Kolb-List >> ========== >> FORUMS - >> eferrer" target="_blank">http://forums.matronics.com >> ========== >> WIKI - >> errer" target="_blank">http://wiki.matronics.com >> ========== >> b Site - >> -Matt Dralle, List Admin. >> rel="noreferrer" target="_blank">http://www.matronics.com/contributi on >> ========== >> >> >> >> > > -- > =9CBlessed are the cracked, for they shall let in the light. =9D Groucho Marx > > > ________________________________ Message 6 _____________________________________ Time: 07:37:32 PM PST US Subject: Kolb-List: Re: 3.47:1 gear box From: "Richard Pike" You guys are great, that is just what I needed to know, thanks. So now it looks like the only real task is fabricating new taller motor mounts to fit the 72" prop? Anybody want to send some pictures of how you did it? -------- 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. 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