---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 03/09/11: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:27 AM - Re: Re: Bing Type 64 Carb. Idle Mixture Setting (Hugh McKay) 2. 02:01 PM - Re: Bing Type 64 Carb. Idle Mixture Setting (Roger Lee) 3. 02:20 PM - Re: Re: Bing Type 64 Carb. Idle Mixture Setting (Hugh McKay) 4. 06:19 PM - Re: Bing Type 64 Carb. Idle Mixture Setting (Roger Lee) ________________________________ Message 1 _____________________________________ Time: 06:27:30 AM PST US From: "Hugh McKay" Subject: Re: RotaxEngines-List: Re: Bing Type 64 Carb. Idle Mixture Setting Roger, I finally got around to flying yesterday. I flew the Allegro 2000 at WOT in level flight. At WOT in level flight my speed was around 120 mph and climbing. My rpms were very close to 5800, and if I would have continued at WOT I am sure the rpms would have exceeded 5800, and the speed would have exceeded 120 mph. However, I did not let the engine get to 5800. I backed off the throttle to prevent reaching 5800. With WOT at take off and climb out at 68 to 70 mph the rpm is at 5200. Comments?? Hugh G. McKay III, P.E. Senior Consultant Worldwide Engineering Inc. 4090 North NC Hwy. 16 Denver, NC 28037 Ph. 704-661-8271 Fax 704-483-5466 email hgmckay@bellsouth.net http://www.wwegeo.com -----Original Message----- From: Hugh McKay Sent: Thursday, March 03, 2011 11:16 AM Subject: Re: RotaxEngines-List: Re: Bing Type 64 Carb. Idle Mixture Setting Roger, I never fly WOT while cruising. I will fly today and open her wide open and check the rpm. I will let you know. Hugh G. McKay III, P.E. Senior Consultant Worldwide Engineering Inc. 4090 North NC Hwy. 16 Denver, NC 28037 Ph. 704-661-8271 Fax 704-483-5466 email hgmckay@bellsouth.net http://www.wwegeo.com -----Original Message----- From: Roger Lee Sent: Thursday, March 03, 2011 11:00 AM Subject: RotaxEngines-List: Re: Bing Type 64 Carb. Idle Mixture Setting Hi Hugh, With the rpm numbers you give sounds like you are little under propped. What do you get at WOT flat and level? It sounds like you may be close to 5700 WOT? It won't hurt anything, but you'll loose a little cruise speed and fuel economy. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center Home 520-574-1080 TRY HOME FIRST Cell 520-349-7056 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=332635#332635 ________________________________ Message 2 _____________________________________ Time: 02:01:09 PM PST US Subject: RotaxEngines-List: Re: Bing Type 64 Carb. Idle Mixture Setting From: "Roger Lee" Hi Hugh, Way under propped for a ground adjustable for your type of aircraft. If it does get to 5800+ rpm you may even be loosing climb. I would try and add more pitch of at least 2 degrees, you may need a more like 2.5 degrees more pitch. Try and get it around 5500-5550 WOT flat and level and then report back. It will have better all around performance including fuel economy without sacrificing one characteristic over the another. I have a friend on another forum with an Allegro and we set his up for 5500 area and he loves it. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center Home 520-574-1080 TRY HOME FIRST Cell 520-349-7056 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=333372#333372 ________________________________ Message 3 _____________________________________ Time: 02:20:20 PM PST US From: "Hugh McKay" Subject: Re: RotaxEngines-List: Re: Bing Type 64 Carb. Idle Mixture Setting Roger, I assume you mean 5500 - 5550 rpm (static). Correct? Hugh G. McKay III, P.E. Senior Consultant Worldwide Engineering Inc. 4090 North NC Hwy. 16 Denver, NC 28037 Ph. 704-661-8271 Fax 704-483-5466 email hgmckay@bellsouth.net http://www.wwegeo.com -----Original Message----- From: Roger Lee Sent: Wednesday, March 09, 2011 4:57 PM Subject: RotaxEngines-List: Re: Bing Type 64 Carb. Idle Mixture Setting Hi Hugh, Way under propped for a ground adjustable for your type of aircraft. If it does get to 5800+ rpm you may even be loosing climb. I would try and add more pitch of at least 2 degrees, you may need a more like 2.5 degrees more pitch. Try and get it around 5500-5550 WOT flat and level and then report back. It will have better all around performance including fuel economy without sacrificing one characteristic over the another. I have a friend on another forum with an Allegro and we set his up for 5500 area and he loves it. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center Home 520-574-1080 TRY HOME FIRST Cell 520-349-7056 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=333372#333372 ________________________________ Message 4 _____________________________________ Time: 06:19:23 PM PST US Subject: RotaxEngines-List: Re: Bing Type 64 Carb. Idle Mixture Setting From: "Roger Lee" Hi Hugh, 5500-5550 WOT while you are flying flat and level at your average cruise altitude. So add about 2.5 degrees pitch back into your prop. Then go fly. Go WOT flat and Level for 30-60 seconds and see where it tops out at for rpm. If you need to tweak it after that then it will be a very small adjustment, but 2.5 added ought to be close. You have the prop set in the general area so we don't really care about the static any more. Static changes for all props and I only use static for the the very first run on a prop that I have no experience with. Static is just to get in the ballpark. WOT while flying is the only real way to get an accurate WOT rpm. Trust me, you'll like it. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center Home 520-574-1080 TRY HOME FIRST Cell 520-349-7056 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=333410#333410 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-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/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-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.