---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Sun 03/22/09: 36 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:54 AM - Re: Broken exhaust bracket (Jim Hauck) 2. 06:05 AM - Re: Broken exhaust bracket (lucien) 3. 06:33 AM - Re: 100LL fuel additive (Thom Riddle) 4. 07:02 AM - Re: 100LL fuel additive (Thom Riddle) 5. 07:18 AM - Re: Re: 100LL fuel additive (John Hauck) 6. 07:18 AM - Max Gross (david watkins) 7. 07:32 AM - Re: Re: 100LL fuel additive (John Hauck) 8. 08:42 AM - Re: Max Gross (Richard & Martha Neilsen) 9. 09:53 AM - Re: Re: 100LL fuel additive (Richard Girard) 10. 09:53 AM - Re: Max Gross (Watkinsdw) 11. 10:05 AM - Re: Re: 100LL fuel additive (John Hauck) 12. 10:07 AM - Re: Max Gross (Richard Girard) 13. 10:20 AM - Re: Re: Max Gross (John Hauck) 14. 10:21 AM - Muffler fix (Richard Girard) 15. 10:33 AM - MKIII Performance (John Hauck) 16. 11:04 AM - Re: MKIII Performance (Mike Welch) 17. 11:04 AM - Re: Muffler fix (Jim Hauck) 18. 11:15 AM - Re: MKIII Performance (John Hauck) 19. 11:15 AM - Re: Max Gross (Watkinsdw) 20. 11:45 AM - Re: MKIII Performance (lucien) 21. 11:52 AM - Re: Broken exhaust bracket (cristalclear13) 22. 01:02 PM - Re: Broken exhaust bracket (George Alexander) 23. 01:15 PM - Re: Rotax 912 UL for sale (Watkinsdw) 24. 02:18 PM - Re: Muffler fix (robert bean) 25. 03:08 PM - Re: Broken exhaust bracket (Mike Welch) 26. 03:08 PM - Re: Off list - Hirth reputation. (JetPilot) 27. 03:31 PM - Re: Re: 100LL fuel additive (Larry Cottrell) 28. 05:57 PM - Re: Re: Off list - Hirth reputation. (Jim Baker) 29. 06:28 PM - Re: Re: Off list - Hirth reputation. (Brad Stump) 30. 06:33 PM - Re: Off list - Hirth reputation. (Beauford T) 31. 06:47 PM - Re: Re: Off list - Hirth reputation. (Brad Stump) 32. 06:57 PM - Re: Off list - Hirth reputation. (N111KX (Kip)) 33. 07:19 PM - Re: Re: Off list - Hirth reputation. (jerb) 34. 08:08 PM - Re: Re: Off list - Hirth reputation. (Jim Baker) 35. 08:08 PM - Re: Re: Off list - Hirth reputation. (Jim Baker) 36. 09:35 PM - Re: Re: Off list - Hirth reputation. (DAquaNut@aol.com) ________________________________ Message 1 _____________________________________ Time: 04:54:16 AM PST US From: "Jim Hauck" Subject: Re: Kolb-List: Broken exhaust bracket Good morning Cristal; Yes, the rubber bushings should be on the muffler bracket and not on one side of the muffler bracket and on half on the back side of the support angle. The cracked bracket could be contributed to the set up and also could just be fair wear and tear from vibration. I would suggest grinding the washer off the muffler bracket and welding an 1/8" thick plate the full length of the bracket where the washer is located now. Just weld the sides of the muffler bracket, not across the top or bottom as that will cause a stress point where the bracket bends. Ha, you live to far away or I would weld it up for you.:) Jim ________________________________ Message 2 _____________________________________ Time: 06:05:15 AM PST US Subject: Kolb-List: Re: Broken exhaust bracket From: "lucien" Ralph B wrote: > > 1) the reason it cracked is that you have the old style single-jointed muffler with one set of 3 springs. These older mufflers are prone to cracking. > Ralph B This is a good point. These older style mufflers had only one point in the tubing where they could flex. A common area of cracking on these is in an almost perfect circle right at the seam where the main expansion tube goes into the can. I had an eipper style one of these older mufflers on my quicksilver that gave this exact circle-wise cracking in that area. Got a friend to TIG weld a new bead around there which fixed it. But you have to pay very close attention to the tension of the springs and the muffler mounting with the old style. They can't be too tight to where they prevent movement of the joint, a common installation problem. Anti-sieze on the parts during assembly helps a bit as well. But the new style with the seperate elbow is a lot better as it has 2 joints where the whole works can move and better isolates the vibration of the motor from the muffler. The Kolb mounting design with the bracket bolted to the heads is actually very secure and gives good support for the can (mine would hold the muffler can perfectly in place even with no elbow installed yet) so repairing the bracket may be all you need to do. But if it keeps cracking, you might want to replace the muffler with the new style...... LS -------- LS Titan II SS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=235618#235618 ________________________________ Message 3 _____________________________________ Time: 06:33:50 AM PST US Subject: Kolb-List: Re: 100LL fuel additive From: "Thom Riddle" I just visited the MMO website http://www.marvelmysteryoil.com/index.php/site/products/ and they have multiple products, or at least it seems that way. Which of these are you MMO aficionados using? The first one listed on their site comes in 16 oz to 55 gallon sizes and they suggest using this one in gasoline and oil. The 2nd is for diesel. The 3rd listing is called Marvel Super Gas Treatment and it shows only 12 oz containers. -------- Thom Riddle Buffalo, NY http://riddletr.googlepages.com/sportpilot-cfi http://riddletr.googlepages.com/a%26pmechanix A complex system that works is invariably found to have evolved from a simple system that works. - John Gaule Read this topic online here: http://forums.matronics.com/viewtopic.php?p=235626#235626 ________________________________ Message 4 _____________________________________ Time: 07:02:35 AM PST US Subject: Kolb-List: Re: 100LL fuel additive From: "Thom Riddle" The MMO FAQ has a lot of info pertinent to its use, including the following excerpts: Can I use MMO in 2-cycle engines? Yes, MMO is safe for use in 2-cycle engines. Replace 25% of the 2-cycle oil with MMO. For example, if use 8oz of 2-cycle oil, replace 2oz of 2-cycle with 2oz of MMO at oil change. Can I use MMO for winter storage as a fuel stabilizer? Yes, you can use MMO as a fuel stabilizer. Use 4ozs of Marvel for every 10 gallons of fuel. Can I use MMO in my air tools such as a nail gun? Yes, you can use MMO in your air tools. However, we recommend you use Marvel Air Tool oil for longer term use. The formulation of the Air Tool Oil is nearly identical to the original MMO but also includes a heavy-duty corrosion inhibitor to protect the tool in the high-moisture environment of air tools. -------- Thom Riddle Buffalo, NY http://riddletr.googlepages.com/sportpilot-cfi http://riddletr.googlepages.com/a%26pmechanix A complex system that works is invariably found to have evolved from a simple system that works. - John Gaule Read this topic online here: http://forums.matronics.com/viewtopic.php?p=235630#235630 ________________________________ Message 5 _____________________________________ Time: 07:18:42 AM PST US From: "John Hauck" Subject: Re: Kolb-List: Re: 100LL fuel additive > and they have multiple products, or at least it seems that way. Which of these are you MMO aficionados using? The first one listed on their site comes in 16 oz to 55 gallon sizes and they suggest using this one in gasoline and oil. The 2nd is for diesel. The 3rd listing is called Marvel Super Gas Treatment and it shows only 12 oz containers. > > -------- > Thom Riddle The one I use is the only one available at stores I frequent, the first one listed for gas and diesel engines. I believe it recommends one quart for 80 to 100 gals. That is normally the ratio I mix, sometimes more than recommended. I am not too particular. Never had a fouled plug or stuck valve in a 912 while using MMO. In 1994, I flew 232 hours in 41 days with a 912UL. I did not use MMO. About every 75 hours, operating on a steady diet of 100LL, at least one plug will start fouling. Indication was a slight thumping/tapping felt in the airframe. Really gets your attention when flying over inhospitable terrain. I'd land at the next available airport, pull the plugs, clean them with my knife and the wire on my spark plug gap gauge. Good for another 75 hours. The 912 was being operated at 5,000 rpm cruise. Don't have that problem with the 912ULS, normally. I did go through some engine missing and power problems last year on my flight out West. I think some of that was carb icing. Was flying with John W. His 912ULS was not experiencing any problems. May have been a gremlin. Have not had that problem since. john h mkIII ________________________________ Message 6 _____________________________________ Time: 07:18:43 AM PST US Subject: Kolb-List: Max Gross From: david watkins Can anyone explain to me how the maximum gross weight is set for a MIII? I'm told it's set by the builder, not Kolb. Thanks, Dave ________________________________ Message 7 _____________________________________ Time: 07:32:14 AM PST US From: "John Hauck" Subject: Re: Kolb-List: Re: 100LL fuel additive > Can I use MMO in 2-cycle engines? > Yes, MMO is safe for use in 2-cycle engines. Replace 25% of the 2-cycle > oil with MMO. For example, if use 8oz of 2-cycle oil, replace 2oz of > 2-cycle with 2oz of MMO at oil change. > -------- > Thom Riddle I would not replace two stroke oil with MMO, but add it in addition to the recommended amount of two stroke oil. Personal opinion and gut feeling only. I use regular MMO in my air tools. Haven't worn one out yet. john h mkIII ________________________________ Message 8 _____________________________________ Time: 08:42:23 AM PST US From: "Richard & Martha Neilsen" Subject: Re: Kolb-List: Max Gross Dave The builder does set the maximum gross weight along with a bunch of other stuff. The same regulations are there for original designs. The Kolb MKIII has a factory recommended max gross weight of 1000 lbs. set by a structural engineer. It was based on the design limits of the standard airframe with some leeway for less than quality workmanship. At least one of our group has increased the limit by making a bunch of structural changes and has proven its strength. If you do quality work and built the plane exactly like John H built his it would appear the limit can be safely increased to 1200 lbs. If your not a structural engineer any deviations from John's proven modifications could put the airframe at risk at this higher limit. John is the test pilot of his design modifications and continues to be. Another way of answering the question would be to say you as the builder can set the limit at 2,000 lbs and are killed in a crash you will not be cited by the FAA for violating experimental regulations. As always worth what you paid for it. Rick Neilsen Redrive VW powered MKIIIC ----- Original Message ----- From: david watkins To: Kolb messages Sent: Sunday, March 22, 2009 10:18 AM Subject: Kolb-List: Max Gross Can anyone explain to me how the maximum gross weight is set for a MIII? I'm told it's set by the builder, not Kolb. Thanks, Dave ________________________________ Message 9 _____________________________________ Time: 09:53:33 AM PST US Subject: Re: Kolb-List: Re: 100LL fuel additive From: Richard Girard Thom, I use the original MMO in the HKS in the gas only since HKS specs a full synthetic oil and I don't want to mix. Rick On Sun, Mar 22, 2009 at 8:33 AM, Thom Riddle wrote: > > I just visited the MMO website > > http://www.marvelmysteryoil.com/index.php/site/products/ > > and they have multiple products, or at least it seems that way. Which of > these are you MMO aficionados using? The first one listed on their site > comes in 16 oz to 55 gallon sizes and they suggest using this one in > gasoline and oil. The 2nd is for diesel. The 3rd listing is called Marvel > Super Gas Treatment and it shows only 12 oz containers. > > -------- > Thom Riddle > Buffalo, NY > http://riddletr.googlepages.com/sportpilot-cfi > http://riddletr.googlepages.com/a%26pmechanix > > A complex system that works is invariably found to have evolved from a > simple system that works. > - John Gaule > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=235626#235626 > > ________________________________ Message 10 ____________________________________ Time: 09:53:33 AM PST US Subject: Kolb-List: Re: Max Gross From: "Watkinsdw" Thanks, Rick. I'm in the process of buying a 2001 MKIII powered by a 912s. The builder, who is described as a very meticulous craftsman, has set the max gross at 1050#. I can live with that, but since I weigh 190, and my partner 170, we'll have to carry less than full fuel in the 20 gal. tank. The empty weight is 594#, probably in part due to the 912s, and the BRS. I'd heard about John's increase, and wondered how much flexibility I had, especially since I fantasize about installing floats, down the road. Are you there, John, and do you have any suggestions? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=235657#235657 ________________________________ Message 11 ____________________________________ Time: 10:05:26 AM PST US From: "John Hauck" Subject: Re: Kolb-List: Re: 100LL fuel additive Ricks msg reminded me I probably should have indicated I do not use MMO in the crankcase of the 912ULS. However, it might not be a bad idea to add some just prior to oil change to help stir up and get more lead into suspension. On antique tractors, as soon as I get one, I put a quart of MMO in the gas tank and another in the crankcase. I helps loosen up a lot of sludge and crap from years of nondetergent oil. However, that ain't got nothing to do with airplane engines. ;-) john h mkIII Thom, I use the original MMO in the HKS in the gas only since HKS specs a full synthetic oil and I don't want to mix. Rick ________________________________ Message 12 ____________________________________ Time: 10:07:09 AM PST US Subject: Re: Kolb-List: Max Gross From: Richard Girard Richard is right, you will set the max gross weight on the forms you will file to get your experimental certificate. You may set it at whatever you wish, however, to get your aircraft out of phase 1 testing you must demonstrate and document the aircraft's performance at this weight. Rick Girard do not archive On Sun, Mar 22, 2009 at 9:18 AM, david watkins wrote:Can anyone explain to me how the maximum gross weight is set for a MIII? I'm told it's set by the builder, not Kolb. > > Thanks, > Dave > > * > > ________________________________ Message 13 ____________________________________ Time: 10:20:14 AM PST US From: "John Hauck" Subject: Re: Kolb-List: Re: Max Gross > I'd heard about John's increase, and wondered how much flexibility I had, > especially since I fantasize about installing floats, down the road. > > Are you there, John, and do you have any suggestions? I can't tell you what to do, but I, personally, would not hesitate to fly this particular mkIII at more than the recommended 1,000 lbs gross weight. As far as floats are concerned, I have no ideas and can not comment on them. There are no major improvements on the fuselage of my mkIII from a standard mkIII. Most of the changes Brother Jim made to my fuselage at the Kolb Factory, were automatically incorporated in standard mkIII fuselages, little things most folks don't know about. I guess the biggest change I made was reinforcing the noses of all main ribs and the tails of the four outboard main ribs, additional bracing on the bowtip and increased lateral bracing on the leading edge of the wing. Redesigning the main gear did nothing for increasing gross weight capability. Flight characteristics and capability don't change much with Homer's big straight wings. They love to haul stuff! The main reason I upgraded the wings was based primarily on the type flying I knew my mkIII would be subjected to, and personal preference of the way I like things to be in my airplane. If anyone chooses to fly a Kolb aircraft over the recommended maximum gross weight, it is their decision to do so, not mine. I don't recommend other folks fly their Kolbs the way I fly mine. john h mkIII ________________________________ Message 14 ____________________________________ Time: 10:21:58 AM PST US Subject: Kolb-List: Muffler fix From: Richard Girard Cristal, Jim, what do you think of using silver solder to fix the crack. Lower temperature, less stress. I haven't used it in this application, but it seems reasonable. Brazing would be another option.Cristal, when doing the fix, make sure the system isn't bound up in some way so that it has to be forced into position to get everything hooked up. Make sure to use anti-sieze compound on the ball joints so these are free to move as the system expands and contracts. Replace the rubber dampers and use them on both sides of the muffler attachment brackets. I use the mounts you asked about on my 582, but has the three piece exhaust system, hence more alignment options. Rick do not archive ________________________________ Message 15 ____________________________________ Time: 10:33:27 AM PST US From: "John Hauck" Subject: Kolb-List: MKIII Performance Got out and enjoyed an hour of wonderful last light flight yesterday. Perfect day for flying. Spring is bursting out, air was clear and cool, about 65F. 912ULS was turning 5,500 RPM WOT straight and level flight. Climbed 1,500 FPM at 70 mph indicated, 5400 RPM. Climbed 1,800 FPM at 50 mph indicated, 5300 RPM. Floated halfway down Gantt International Airport in ground effect with 40 degrees of flaps. Demonstrated no threat of deadly Kolb Quit. Had 10 gals fuel on board, solo. john h mkIII ________________________________ Message 16 ____________________________________ Time: 11:04:56 AM PST US From: Mike Welch Subject: RE: Kolb-List: MKIII Performance > Climbed 1=2C800 FPM at 50 mph indicated=2C 5300 RPM. > john h > mkIII John=2C Can't say I've ever heard of such climb out perfromance on a Kolb!! Must have felt like an elevator!! 1800 FPM?!! Must have been a sight to watch from the ground. Mike Welch _________________________________________________________________ Windows Live=99 SkyDrive: Get 25 GB of free online storage. http://windowslive.com/online/skydrive?ocid=TXT_TAGLM_WL_skydrive_032009 ________________________________ Message 17 ____________________________________ Time: 11:04:57 AM PST US From: "Jim Hauck" Subject: Re: Kolb-List: Muffler fix Rick; I would never use silver solder on that type of repair, unless I was 40,000 miles from no where and that was all I had. No again on brazing. If a plate was welded up the way I suggested it will last a very long time. I do agree with you on making sure that there is no stress points from misalignment of bolts and etc. Jim H ________________________________ Message 18 ____________________________________ Time: 11:15:09 AM PST US Subject: Kolb-List: Re: MKIII Performance From: "John Hauck" Not bad for an old bird. Those are "indicated speeds and climb rates". How accurate are they? I don't have a clue, but probably pretty close, close enough for me. I thought they all climbed like that with 912ULS. John Bickham has a mkIII that climbs like that with a 912UL. I had a hard time keeping up with him last year at the Nauga Flyin. -------- John Hauck MKIII/912ULS hauck's holler, alabama Read this topic online here: http://forums.matronics.com/viewtopic.php?p=235678#235678 ________________________________ Message 19 ____________________________________ Time: 11:15:10 AM PST US Subject: Kolb-List: Re: Max Gross From: "Watkinsdw" Thanks, John, Your comments are accepted in the spirit in which they were offered-"information", not "recommendation". I appreciate your steering me to the Kolb in question. I've been very impressed with the integrity of the the builder, and look forward to flying the plane. Finally, I look forward to learning more from you as time goes by. Dave Read this topic online here: http://forums.matronics.com/viewtopic.php?p=235679#235679 ________________________________ Message 20 ____________________________________ Time: 11:45:42 AM PST US Subject: Kolb-List: Re: MKIII Performance From: "lucien" John Hauck wrote: > Not bad for an old bird. > > Those are "indicated speeds and climb rates". How accurate are they? I don't have a clue, but probably pretty close, close enough for me. > > I thought they all climbed like that with 912ULS. > > John Bickham has a mkIII that climbs like that with a 912UL. I had a hard time keeping up with him last year at the Nauga Flyin. For what it's worth, my FSII would do around 900fpm sustained at sea level, which was pretty good considering it had come out at a rather heavy 440lbs empty weight for the original builder. Part of that was the C box with clutch he'd opted for for the 3 blade warp drive prop. This had prompted the addition of 10lbs of ballast to the nose to get the CG to come out right. Even out here before I sold it it could do between 300 and 400 fpm climb. Again pretty impressive given the 503 is about a 377 at this altitude. The Kolb wing is definitely made for lifting. As for the 912ULS, I think it's about the best you can do for a 100hp engine period. The only other aircraft motor Rotax made that could beat it (and smoke it too) was the 618 and (unfortunately IMO) it's not in production anymore. And it couldn't do it for 2000 hours + either besides. Since this is the Kolb forum I don't want to brag about other planes, but my 912ULS gives me similar performance, I'll just say that. LS -------- LS Titan II SS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=235688#235688 ________________________________ Message 21 ____________________________________ Time: 11:52:29 AM PST US Subject: Kolb-List: Re: Broken exhaust bracket From: "cristalclear13" jimh474(at)embarqmail.com wrote: > Yes, the rubber bushings should be on the muffler bracket and not on one > side of the muffler bracket and on half on the back side of the support > angle. > > Jim I found what I think is the rubber bushings that was used originally. In the CPS catalogue I found part numbers 9406 (male bushing) and 9408 (female bushing): http://www.rotaxparts.net/scripts/prodView.asp?idproduct=838 However a friend mentioned that I should probably use barry mount isolators: http://www.greenskyadventures.com/Installation_items/vibmntimages.htm However it looks like there are various ones to choose from (according to the chart at the bottom of that webpage). Has anyone used these and if so, which ones (what series and color)? -------- Cristal Waters Kolb Mark II Twinstar Rotax 503 DCSI Read this topic online here: http://forums.matronics.com/viewtopic.php?p=235691#235691 ________________________________ Message 22 ____________________________________ Time: 01:02:35 PM PST US Subject: Kolb-List: Re: Broken exhaust bracket From: "George Alexander" cristalclear13 wrote: > > > - - - snip- - - > > I know there aren't many of you out there that have a 503 anymore and probably don't even have the same set up for the exhaust if you do have a 503, but if you have something similar could you please post a picture and/or diagram? > > - - - snip- - - > > Cristal: Know you've gotten lots of input since the posting..... but here's a picture of my set up on my FSII. (R503). If you go with the recommended bushings from CPS, don't forget the backing washers. -------- George Alexander FS II R503 N709FS http://gtalexander.home.att.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=235696#235696 Attachments: http://forums.matronics.com//files/503_muffler_mount_003_small_423.jpg ________________________________ Message 23 ____________________________________ Time: 01:15:47 PM PST US Subject: Kolb-List: Re: Rotax 912 UL for sale From: "Watkinsdw" Hey, George, What kind of airplane are you putting the floats on? I'm fantasizing about the same modification on a Kolb MKIII w/ 912s. Dave Read this topic online here: http://forums.matronics.com/viewtopic.php?p=235698#235698 ________________________________ Message 24 ____________________________________ Time: 02:18:02 PM PST US From: robert bean Subject: Re: Kolb-List: Muffler fix There are different grades of silver solder. If the right one is used it is as good as a weld. Brazing has low strength and prone to cracking easily under flex. There is a big difference between the two. BB, lots of experience fabricating hi-vac ultra thin wall stainless lab equipment with it. The stuff I used cost big bucks and had to be bought from a specialty manufacturer. -But then the department of energy has deep pockets :) On 22, Mar 2009, at 2:03 PM, Jim Hauck wrote: > Rick; > > I would never use silver solder on that type of repair, unless I > was 40,000 miles from no where and that was all I had. No again on > brazing. > > If a plate was welded up the way I suggested it will last a very > long time. > > I do agree with you on making sure that there is no stress points > from misalignment of bolts and etc. > > Jim H > > ________________________________ Message 25 ____________________________________ Time: 03:08:08 PM PST US From: Mike Welch Subject: RE: Kolb-List: Broken exhaust bracket > I've also attached a picture of my exhaust with the mount with some lette rs pointing to various places. > Cristal Waters > Kolb Mark II Twinstar > Rotax 503 DCSI Cristal=2C It seems to me Jim H. has suggested the best way to repair the bracket. A TIG weld as he described should last a long time. If you have the room on your support bracket=2C you might consider adding a duplicate bracket=2C while the muffler is being welded=2C anyway. By distributing the vibration load between 2 mounting locations=2C you ma y not have a problem for a very long time. Just an idea.... Mike Welch MkIII _________________________________________________________________ Get quick access to your favorite MSN content with Internet Explorer 8. http://ie8.msn.com/microsoft/internet-explorer-8/en-us/ie8.aspx?ocid=B037 MSN55C0701A ________________________________ Message 26 ____________________________________ Time: 03:08:25 PM PST US Subject: Kolb-List: Re: Off list - Hirth reputation. From: "JetPilot" Its always possible to have good results with a bad engine, but that makes it an exception. When choosing an engine, I would consider the record of the all of the engines of that make and model, not ONE... I would never make an engine choice based on just one exceptional case. That being said, I have seen from many sources the same as posted earlier, Hearth engines are horrible for reliability and don't last long. I would never use one. From what Jim reports ,his experience is very good, but that does not change the MANY with bad experiences with Hirth engines. Do your research before deciding on an engine for an airplane ! 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=235713#235713 ________________________________ Message 27 ____________________________________ Time: 03:31:51 PM PST US From: "Larry Cottrell" Subject: Re: Kolb-List: Re: 100LL fuel additive Gang, When I used it in my 503 I added it to the regular amount of two stroke oil, My plugs showed no indication that it was getting too much oil. Larry C ----- Original Message ----- From: John Hauck To: kolb-list@matronics.com Sent: Sunday, March 22, 2009 8:30 AM Subject: Re: Kolb-List: Re: 100LL fuel additive > Can I use MMO in 2-cycle engines? > Yes, MMO is safe for use in 2-cycle engines. Replace 25% of the 2-cycle > oil with MMO. For example, if use 8oz of 2-cycle oil, replace 2oz of > 2-cycle with 2oz of MMO at oil change. > -------- > Thom Riddle I would not replace two stroke oil with MMO, but add it in addition to the recommended amount of two stroke oil. Personal opinion and gut feeling only. I use regular MMO in my air tools. Haven't worn one out yet. john h mkIII ------------------------------------------------------------------------- ----- Checked by AVG - www.avg.com 03/21/09 17:58:00 ________________________________ Message 28 ____________________________________ Time: 05:57:21 PM PST US From: "Jim Baker" Subject: Re: Kolb-List: Re: Off list - Hirth reputation. X-mailer: Pegasus Mail for Windows (4.41) X-SpamReason %%SpamReason%%: > When choosing an engine, I would > consider the record of the all of the engines of that make and > model, not ONE. ...and a great deal of grief can be heard from Rotax, Lycoming, Continental, AMW, MZ, VW, , etc....Very seldom do we routinely and continually hear about the successes, just the failures. "Hey, didja hear that so-and-so made an entirely uneventful flight?" > That being said, I have seen from many sources the same as posted > earlier, Hearth engines are horrible for reliability and don't > last long I've also heard that Hearth engines suck..... ; ) . I would never use one. From what Jim reports ,his > experience is very good, but that does not change the MANY with > bad experiences with Hirth engines. Do your research before > deciding on an engine for an airplane ! Absolutely, do your research. Consider the source, talk to owners, don't just listen to detractors, get facts...... That said, I'm not an advocate for or against Hirth. All I know is that my engine, appparently the only known success story for this marque, has served me well, without problems. Were it not for Hirth (or at least my model of Hirth), I'd most likely have a Rotax. Are Hirth without problems? Nope. The 2706 was a problematic engine that had several vices, none of them forgiving. Are there bad Hirth engines? Some of the reputation is undeserved because Jim Bede ordered a boat load of short block Hirth engines (without intake, carbs, or exhaust) for the BD-5 and when that didn't pan out, untested and incomplete engines were dumped on the market. Some can still be obtained. Cobbled up two stroke engines, particularly with unknown lineage exhaust systems, aren't pretty. On the other side of this equation are owners, some of whom should never own two stroke engines. They don't understand them, aren't willing to learn how to make them happy, treat them like four strokes, and just generally cause havoc through ignorance. As the Bard once said, Ignorance is the curse of God, Knowledge the wing wherewith we fly to heaven. On that note...... Jim Baker 580.788.2779 405. 426.5377 cell Elmore City, OK ________________________________ Message 29 ____________________________________ Time: 06:28:46 PM PST US From: Brad Stump Subject: Re: Kolb-List: Re: Off list - Hirth reputation. I flew ultra lites for a lot of years with Cyuna engines,two engine outs,one right after take-off,If not for my first flight instructor beating in my head emergency procedures,it could have been a nasty outcome.All engine outs were from cold seizure,The Hirth engine is suppost to be immune.As for longevity only time will tell. > -----Original Message----- > From: jlbaker@msbit.net > Sent: Sun, 22 Mar 2009 19:56:30 -0500 > To: kolb-list@matronics.com > Subject: Re: Kolb-List: Re: Off list - Hirth reputation. > > > X-SpamReason %%SpamReason%%: > >> When choosing an engine, I would >> consider the record of the all of the engines of that make and >> model, not ONE. > > ...and a great deal of grief can be heard from Rotax, Lycoming, > Continental, AMW, MZ, VW, , etc....Very seldom do we routinely and > continually hear about the successes, just the failures. "Hey, didja > hear that so-and-so made an entirely uneventful flight?" > >> That being said, I have seen from many sources the same as posted >> earlier, Hearth engines are horrible for reliability and don't >> last long > > I've also heard that Hearth engines suck..... ; ) > > . I would never use one. From what Jim reports ,his >> experience is very good, but that does not change the MANY with >> bad experiences with Hirth engines. Do your research before >> deciding on an engine for an airplane ! > > Absolutely, do your research. Consider the source, talk to owners, > don't just listen to detractors, get facts...... > > > That said, I'm not an advocate for or against Hirth. All I know is > that my engine, appparently the only known success story for this > marque, has served me well, without problems. Were it not for Hirth > (or at least my model of Hirth), I'd most likely have a Rotax. Are > Hirth without problems? Nope. The 2706 was a problematic engine that > had several vices, none of them forgiving. Are there bad Hirth > engines? Some of the reputation is undeserved because Jim Bede > ordered a boat load of short block Hirth engines (without intake, > carbs, or exhaust) for the BD-5 and when that didn't pan out, > untested and incomplete engines were dumped on the market. Some can > still be obtained. Cobbled up two stroke engines, particularly with > unknown lineage exhaust systems, aren't pretty. > > On the other side of this equation are owners, some of whom should > never own two stroke engines. They don't understand them, aren't > willing to learn how to make them happy, treat them like four > strokes, and just generally cause havoc through ignorance. As the > Bard once said, > > Ignorance is the curse of God, Knowledge the wing wherewith we fly to > heaven. > > On that note...... > > Jim Baker > 580.788.2779 > 405. 426.5377 cell > Elmore City, OK > > ________________________________ Message 30 ____________________________________ Time: 06:33:24 PM PST US From: "Beauford T" Subject: Kolb-List: Re: Off list - Hirth reputation. ...well said, sir... but I betcha when knowledge straps in and cranks up for that particular leg, it won't be behind a Rotax OR a Hirth 2 stroke.... ;-) beauford, FF-076 Do Not Archive ----- Original Message ----- From: "Jim Baker" Knowledge the wing wherewith we fly to heaven. ________________________________ Message 31 ____________________________________ Time: 06:47:11 PM PST US From: Brad Stump Subject: RE: Kolb-List: Re: Off list - Hirth reputation. ....Maybe because of Rotax or Hirth ect... > -----Original Message----- > From: beauford173@verizon.net > Sent: Sun, 22 Mar 2009 21:32:58 -0400 > To: kolb-list@matronics.com > Subject: Kolb-List: Re: Off list - Hirth reputation. > > > ...well said, sir... but I betcha when knowledge straps in and cranks up > for that > particular leg, it won't be behind a Rotax OR a Hirth 2 stroke.... ;-) > > beauford, > FF-076 > Do Not Archive > > > ----- Original Message ----- > From: "Jim Baker" > > Knowledge the wing wherewith we fly to heaven. > > > > > ____________________________________________________________ FREE 3D EARTH SCREENSAVER - Watch the Earth right on your desktop! Check it out at http://www.inbox.com/earth ________________________________ Message 32 ____________________________________ Time: 06:57:26 PM PST US Subject: Kolb-List: Re: Off list - Hirth reputation. From: "N111KX (Kip)" While I have flown behind a Hirth for 15 minutes or so and, it ran fine, I'd hate to be a dealer that has to sell the "2000 hour TBO" I see in the ad's... [Rolling Eyes] -------- Kip Firestar II, N111KX Waiex, N111YX Quickie 1, N111QX Atlanta Read this topic online here: http://forums.matronics.com/viewtopic.php?p=235753#235753 ________________________________ Message 33 ____________________________________ Time: 07:19:07 PM PST US From: jerb Subject: Re: Kolb-List: Re: Off list - Hirth reputation. Mike and all, Some time back I had much the same opinion as you regarding Hirths. My wing man went down twice - the second rebuild they changed both the crank & the case. That seemed to cure the problem. Matt at Recreational Power Engineering has made a lot of progress with Hirth improving the quality of engine they turn out. Last I new my friend has run it well over 400 hours and it's still going. The new model engines appear to be much more reliable. There are some advantages of running their lower RPM, higher torque engine, not as noisy and better fuel economy. jerb At 05:08 PM 3/22/2009, you wrote: > >Its always possible to have good results with a bad engine, but that >makes it an exception. When choosing an engine, I would consider >the record of the all of the engines of that make and model, not >ONE... I would never make an engine choice based on just one exceptional case. > >That being said, I have seen from many sources the same as posted >earlier, Hearth engines are horrible for reliability and don't last >long. I would never use one. From what Jim reports ,his experience >is very good, but that does not change the MANY with bad >experiences with Hirth engines. Do your research before deciding on >an engine for an airplane ! > >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=235713#235713 > > ________________________________ Message 34 ____________________________________ Time: 08:08:59 PM PST US From: "Jim Baker" Subject: Re: Kolb-List: Re: Off list - Hirth reputation. X-mailer: Pegasus Mail for Windows (4.41) X-SpamReason %%SpamReason%%: >All engine outs were from cold seizure,The > Hirth engine is suppost to be immune. If there were a consensus about what precicely constituites a cold seizure, I might agree. As for immunity....perhaps better than an iron sleeved cylinder that grows at a rate lower than the piston's growth....but still subject to the vagaries of overly lean mixture and lubrication film failure. Shoot, Rotax said it best in their literature...... "This engine, by its design, is subject to sudden stoppage." Jim Baker 580.788.2779 405. 426.5377 cell Elmore City, OK ________________________________ Message 35 ____________________________________ Time: 08:08:59 PM PST US From: "Jim Baker" Subject: Re: Kolb-List: Re: Off list - Hirth reputation. X-mailer: Pegasus Mail for Windows (4.41) X-SpamReason %%SpamReason%%: > I'd hate to be a dealer that has to sell the "2000 hour TBO" I see in the ad's... [Rolling Eyes] I'm more than a bit skeptical, as well. Examples of 1200-1500 hrs have been reported for other UL two stroke cranks, so perhaps the margins are reachable.... Jim Baker 580.788.2779 405. 426.5377 cell Elmore City, OK ________________________________ Message 36 ____________________________________ Time: 09:35:29 PM PST US From: DAquaNut@aol.com Subject: Re: Kolb-List: Re: Off list - Hirth reputation. In a message dated 3/22/2009 10:09:15 P.M. Central Daylight Time, jlbaker@msbit.net writes: Shoot, Rotax said it best in their literature...... "This engine, by its design, is subject to sudden stoppage." Jim, I think that statement was made to cover their hind end. If something happens to a Rotax you cant say they did not warn You! I have been around Ultralights since the early 80.s I never met a happy Hirth owner! As long as they have been around they should get it right. Hopefully the guy that was flying at the New Kolb Homecoming is happy! His Hirth sound ed fairly good from the ground Ed Diebel FF 62 **************Feeling the pinch at the grocery store? Make dinner for $10 or less. 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