---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Tue 02/05/08: 11 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:13 AM - Re: Re: Ultrastar Update (Dana Hague) 2. 07:40 AM - Re: Ultrastar Update (jb92563) 3. 08:04 AM - Re: Re: Ultrastar Update (John Hauck) 4. 08:25 AM - Re: Re: covering (Mike Welch) 5. 09:13 AM - Re: covering (JetPilot) 6. 02:39 PM - Re: Re: Ultrastar Update (herb) 7. 02:53 PM - Re: Re: Ultrastar Update (John Hauck) 8. 03:32 PM - Re: Re: Ultrastar Update (herb) 9. 03:51 PM - Re: Re: Ultrastar Update (Dana Hague) 10. 08:41 PM - Re: MK3 parts (Ron) 11. 10:08 PM - Re: Ultrastar Update (jb92563) ________________________________ Message 1 _____________________________________ Time: 04:13:26 AM PST US From: Dana Hague Subject: Re: Kolb-List: Re: Ultrastar Update At 07:25 PM 2/4/2008, jb92563 wrote: >Are those numbers the Max from Cuyuna manual, or from your own engine? > >I guess looking at the plugs should give an idea to what is happening as well. > >I wonder if a couple minutes running is enough to get an indication on the >plugs? Ray, the numbers I gave are from the Cuyuna manual. I don't know how much running time is necessary to read the plugs, but it can't hurt to have a look. Also check what main jet is in your carb, and where the needle is; you might need to go bigger and/or move the needle clip down. -Dana -- "Very funny, Scotty. Now beam down my clothes." ________________________________ Message 2 _____________________________________ Time: 07:40:30 AM PST US Subject: Kolb-List: Re: Ultrastar Update From: "jb92563" Sounds like I am running to lean if those numbers are right. Not sure how to tune it for richer, would the needle clip go in the next lower notch to make it more rich? Or do I change needles to make it richer.....lower needle number is richer? I'll take a look and see what needle number I am running tonight. Dana, what needle number are you running? Are you using a filter on your carb? -------- Ray Kolb UltraStar (Cuyuna UL-202) Moni MotorGlider Schreder HP-11 Glider Riverside County, CA Do Not Archive Read this topic online here: http://forums.matronics.com/viewtopic.php?p=162522#162522 ________________________________ Message 3 _____________________________________ Time: 08:04:56 AM PST US From: "John Hauck" Subject: Re: Kolb-List: Re: Ultrastar Update Ray: Are you running the correct prop pitch? Two stroke tuning in an airplane is based on correct prop loading as the number one item. If it is incorrect, everything on down the line, jets, needles, and plugs, with also be incorrect. I find the best way to get an unknown engine back in line is put everything in the carb back where it belongs, and insure jetting and needles are correct size. Also insure the spark plug is the correct heat range. Insure the correct prop and pitch is installed. For a Cuyuna ULII02, I believe that would have been a Jim Culver 50X30. That was a perfect prop for the US with ULII02. Hope you all are operating those engines with air filters. john h mkIII > Sounds like I am running to lean if those numbers are right. > Are you using a filter on your carb? > > -------- > Ray ________________________________ Message 4 _____________________________________ Time: 08:25:21 AM PST US From: Mike Welch Subject: RE: Kolb-List: Re: covering Hi Dan, I'm fairly familiar with the design requirements of a smooth flowing airf oil. Without my (Ivo)prop in place, I can't quite tell what shape that fus elage trailing edge fairing would actually be. I think I was more musing, rather than actually suggesting a specific shape. As a propeller blade is swinging past this fairing, would there be any ad vantage at all if the fairing has a "more angled" edge?? I guess that woul d depend on the distance to the fairing and the angle it has to swing past. I just walked out to my shop and took a look at the area in question. Th e aileron tube (and corresponding hardware) really interfere with the abili ty to buiild a very effective fairing. Plus, the fact is you don't get muc h room to build something terribly fancy. I think this is one of those cas es where you do the best you can...and call it good. Now, those wing strut end-fairings Uncle Craig built....those would reall y be nice to have!! Mike Welch Building the first 200 mph MkIII (Just kidding!!) Do Not Archive > Mike,> > For aerodynamic purposes, it's best to minimize the transition a ngles > that the air has to follow - if the angle is too great, the air flo w > will separate (as in wing stall) and you will loose the benefit of the > fairing. In the case below, the angle on the right side might be a bit > steep, depending on how long your fairing is. For a given length, the > sha llowest angle would be achieved by a symmetrical fairing. When I > worked o n pneumatic aircraft systems, we tried to keep angles of sharp > transition s (i.e. the angle from one surface to the next along a > streamline) to les s than 7 degrees, but that was probably conservative.> > The prop clearance you need highly depends on the prop. The IVO prop > needs a lot of clearan ce because it flexes so much. (I think they > recommend at least 5"). Also, as you pointed out, the airflow near the > prop is somewhat complicated, s o I think you would want some separation > in order to minimize vibration d ue to interaction of the prop and airframe.> > Dan G> 503 F2> Tucson> _________________________________________________________________ Helping your favorite cause is as easy as instant messaging.-You IM, we g ive. ________________________________ Message 5 _____________________________________ Time: 09:13:12 AM PST US Subject: Kolb-List: Re: covering From: "JetPilot" I wish Craig would sell the wing strut fairings, and even more so, the big engine cowl he made !!! I would be first in line for that. 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=162539#162539 ________________________________ Message 6 _____________________________________ Time: 02:39:43 PM PST US From: herb Subject: Re: Kolb-List: Re: Ultrastar Update I seem to recall that the Ul202 engine was succeptible to case leaks..Needed re torqueing once in a while.. A very old engine model at any rate..15 years old or older? Herb At 09:37 AM 2/5/2008, you wrote: > >Sounds like I am running to lean if those numbers are right. > >Not sure how to tune it for richer, would the needle clip go in the >next lower notch to make it more rich? > >Or do I change needles to make it richer.....lower needle number is richer? > >I'll take a look and see what needle number I am running tonight. > >Dana, what needle number are you running? > >Are you using a filter on your carb? > >-------- >Ray > >Kolb UltraStar (Cuyuna UL-202) >Moni MotorGlider >Schreder HP-11 Glider >Riverside County, CA > >Do Not Archive > > >Read this topic online here: > >http://forums.matronics.com/viewtopic.php?p=162522#162522 > > ________________________________ Message 7 _____________________________________ Time: 02:53:09 PM PST US From: "John Hauck" Subject: Re: Kolb-List: Re: Ultrastar Update > I seem to recall that the Ul202 engine was succeptible to case > leaks..Needed re torqueing once in a while.. A very old engine model at > any rate..15 years old or older? Herb Herb: The ULII02 was a good engine. Had CDI ign, which was much easier to maintain than the point ign Rotax's. If one did not retorque the cylinders every 100 hours or more, they were prone to leak at the cylinder base gasket. This was probably caused by the small amount of metal that remained after the engine cases were lightened from the 430 to the ULII02. In an US the engine had to be dropped from the engine mount to get at the bolts to torque them. Because of the extra work involved, most of us would fly them until they started leaking, then end up replacing cyl base gaskets and head gaskets. Never had any big problems with the ULII02, but was plagued with little ones that were annoying and would occasionally put one on the ground. It was all a big learning curve, getting out of turbine powered helicopters that had lots of folks and lots of money available for parts and repairs, into a little two stroke that had to be maintained by a guy anxious to fly more than anxious to spend all time on the ground fixing stuff. john h mkIII ________________________________ Message 8 _____________________________________ Time: 03:32:42 PM PST US From: herb Subject: Re: Kolb-List: Re: Ultrastar Update John Yeah! I am old and good also...:-) I had a UL202 on the US that I had... Very surprised at the ease of starting.. Nearly fell backward, expecting to have to pull and pull and pull .. Started just about the time I pulled the rope a foot or so.. Ran strong. Herb At 04:50 PM 2/5/2008, you wrote: > > > > I seem to recall that the Ul202 engine was succeptible to case >>leaks..Needed re torqueing once in a while.. A very old engine >>model at any rate..15 years old or older? Herb > > >Herb: > >The ULII02 was a good engine. Had CDI ign, which was much easier to >maintain than the point ign Rotax's. > >If one did not retorque the cylinders every 100 hours or more, they >were prone to leak at the cylinder base gasket. This was probably >caused by the small amount of metal that remained after the engine >cases were lightened from the 430 to the ULII02. In an US the >engine had to be dropped from the engine mount to get at the bolts >to torque them. Because of the extra work involved, most of us >would fly them until they started leaking, then end up replacing cyl >base gaskets and head gaskets. > >Never had any big problems with the ULII02, but was plagued with >little ones that were annoying and would occasionally put one on the >ground. It was all a big learning curve, getting out of turbine >powered helicopters that had lots of folks and lots of money >available for parts and repairs, into a little two stroke that had >to be maintained by a guy anxious to fly more than anxious to spend >all time on the ground fixing stuff. > >john h >mkIII > > ________________________________ Message 9 _____________________________________ Time: 03:51:29 PM PST US From: Dana Hague Subject: Re: Kolb-List: Re: Ultrastar Update At 10:37 AM 2/5/2008, jb92563 wrote: >Sounds like I am running to lean if those numbers are right. >Not sure how to tune it for richer, would the needle clip go in the next >lower notch to make it more rich? >Or do I change needles to make it richer.....lower needle number is richer? >I'll take a look and see what needle number I am running tonight. >Dana, what needle number are you running? >Are you using a filter on your carb? Ray, yes, it sounds like it's lean. Moving the needle clip down makes the needle go up, which makes it richer... but only in the midrange. I don't know what needle number I have; I don't think many people change them. Full throttle mixture is controlled by the main jet, which _does_ need to be changed according to the seasons or altitude: ULII-02, Cuyuna exhaust, Mikuni VM32 carburetor Altitude 8000 250 240 230 220 210 6000 270 260 250 240 230 4000 290 280 270 260 250 2000 310 300 290 280 270 Sea Level 330 320 310 300 290 Temp. =B0F 0-20=B0 20-40=B0 40-60=B0 60-80=B0 80-100=B0 Mine had a 300 main jet, which I changed to a 310 for winter flying (below 40=B0 and it's too cold to fly!). On a couple of hot days last summer, I stuck with the 300 jet (all I had at the time) but I had the needle clip in the top notch. -Dana -- The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government. - Thomas Jefferson ________________________________ Message 10 ____________________________________ Time: 08:41:37 PM PST US From: Ron Subject: Re: Kolb-List: MK3 parts try this site. http://www.metalsdepot.com/products/alum2.phtml?page=rndtube&LimAcc=%20&aident Now I am not sure that its any cheaper than Kolb or that it is the right wall thinkness, it may be thicker. If you are going to weld your own H brace then it doesn't matter and you will get a stronger and a bit heavier Tube. Ron (Arizona) =========================================== ---- Richard Girard wrote: ============ Aaron, I've looked for the 6" diameter tube used on the Mk.3 without success. I had to buy a 5" tube for another pod and boom airplane in 2006. Got it from Wick's, it was $400(!!!), and I stopped and picked it up as I was coming back from a trip so there was no packing or shipping. 5" was also the biggest size Wick's carried. Just checked their 2008 catalog and 5" is still $32.84 a foot and it's still the largest they carry. Rick On Feb 4, 2008 7:40 PM, Aaron Gustafson wrote: > agustafson@chartermi.net> > > I'm looking for some parts to put together a MK3. Here are a few questions > if anyone can guide me. > > 1. Is there any place other (cheaper) than Kolb to get a fuselage tube? > 2.Has anyone done a major repair on a cage and have any info or > sugestions. > Or should I build one from scratch? Anyone have any info on tubing > diameters > and thicknesses > 3. I believe there have been some gear leg options other than the 7075 > stock > ones. Tell me if you can. > 4.Are there some places better than others for obtaining Polyfiber > products > ie. fabric, paint etc. > > I built a FS2 in 95 and put 440 hours on it. Last June I flew my scratch > built Zenith 601 but I miss being able to look straight down so gotta > build! > > I appreciate any help you can give me 'on list' or private > agustafson@chartermi.net > > Aaron Gustafson Iron Mountain Michigan > > -- kugelair.com ________________________________ Message 11 ____________________________________ Time: 10:08:18 PM PST US Subject: Kolb-List: Re: Ultrastar Update From: "jb92563" Good info folk I appreciate all the great feedback. I'm going to save all that info and check it all out. I also love the easy starting of the UL-202....a short pull is all it takes once its primed. In the meantime, here are some pics. -------- Ray Kolb UltraStar (Cuyuna UL-202) Moni MotorGlider Schreder HP-11 Glider Riverside County, CA Do Not Archive Read this topic online here: http://forums.matronics.com/viewtopic.php?p=162637#162637 Attachments: http://forums.matronics.com//files/kolb_2002_0101_000011aa_543.jpg ------------------------------------------------------------------------------------- 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.