---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 12/30/09: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:27 AM - Re: Rotax 914 Won't Start (pasj66) 2. 04:58 AM - Propeller inertia (Richard Girard) 3. 07:10 AM - Re: Propeller inertia (lucien) 4. 09:08 PM - Rotax Training Requirements and Your LSA (Roger Lee) 5. 10:37 PM - Re: Rotax Training Requirements and Your LSA (Craig Payne) ________________________________ Message 1 _____________________________________ Time: 01:27:40 AM PST US Subject: RotaxEngines-List: Re: Rotax 914 Won't Start From: "pasj66" Hello all, fwiw check starting technique compared with the below document http://www.rotax-aircraft-engines.com/pdf/dokus/d04645.pdf throttle at idle and control rpm with choke until warm. I have a installation with 4 EGTs and the temp distribution is quite sensitive to the choke when cold. Good luck Best regards Patrik -------- MCR R100, R914UL3 W/IC Read this topic online here: http://forums.matronics.com/viewtopic.php?p=279190#279190 ________________________________ Message 2 _____________________________________ Time: 04:58:23 AM PST US Subject: RotaxEngines-List: Propeller inertia From: Richard Girard Once again the subject of propeller inertia has reared it's head. Has anyone EVER found a propeller that falls outside the range of the "C" and "E" 2 stroke gearboxes and the 912 engine (6000 kg(cm squared)) by performing the test in SI 11ul91 E? My experience is limited by the props I own which includes a 3 blade Warp Drive and a 4 blade Power Fin as well as several 2 blade wood props from TPI and Culver. All of them passed, although despite popular mythology my 2 blade 68" wood Culver tested almost as high as the 66" 3 blade (straight blades, no nickle covers) with the HP-L hub. I don't expect that there are NO propellers that exceed the limit, I've just never seen anyone, except me, (look in the Kolb forum archives from early 2007) post that they actually tested a prop and the result. Rick Girard ________________________________ Message 3 _____________________________________ Time: 07:10:28 AM PST US Subject: RotaxEngines-List: Re: Propeller inertia From: "lucien" rickofudall wrote: > Once again the subject of propeller inertia has reared it's head. Has anyone EVER found a propeller that falls outside the range of the "C" and "E" 2 stroke gearboxes and the 912 engine (6000 kg(cm squared)) by performing the test in SI 11ul91 E? My experience is limited by the props I own which includes a 3 blade Warp Drive and a 4 blade Power Fin as well as several 2 blade wood props from TPI and Culver. All of them passed, although despite popular mythology my 2 blade 68" wood Culver tested almost as high as the 66" 3 blade (straight blades, no nickle covers) with the HP-L hub. I don't expect that there are NO propellers that exceed the limit, I've just never seen anyone, except me, (look in the Kolb forum archives from early 2007) post that they actually tested a prop and the result. > > > Rick Girard > The IVO medium in 3-blades is a popular choice and I wouldn't be surprised if it exceeded 6000 kg/cm3. When I took mine off it was like pulling a bowling ball off the back of the plane. In fact, the weight reduction compared to my powerfin was so much I had to redo the W&B (9.2 lbs lighter overall) and the plane flies noticeably differently (CG moved forward nearly an inch). Didn't measure the MOI, tho my 912 was instantly happier at all rpm's and power levels when it was replaced with the powerfin. I had a WD 68" 3 blade on the plane for a while too, but it had to go because of a harmonic vibration problem I couldn't get rid of. Its rotating mass was also significantly less than the IVO medium (and yes contrary to myth, the WD is within the 6000 kg/cm3 MOI limit). Also keep in mind that extensions worsen the situation with any prop, as they add arm to the Coriolis forces exerted on the prop shaft. Rotax limits the permissible length of extension for that reason (a little over 4" IIRC). So you want as light as possible especially with an extension. LS -------- LS Titan II SS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=279210#279210 ________________________________ Message 4 _____________________________________ Time: 09:08:24 PM PST US Subject: RotaxEngines-List: Rotax Training Requirements and Your LSA From: "Roger Lee" Rotax Training Requirements and Your LSA Don't be misinformed here is an article with the real facts. Be one of the informed on LSA maintenance and your Rotax engine. Article by Carol Carpenter of Rainbow Aviation. http://www.rainbowaviation.com/artic...20training.pdf This is a must read for the LSA community. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=279353#279353 ________________________________ Message 5 _____________________________________ Time: 10:37:30 PM PST US From: "Craig Payne" Subject: RE: RotaxEngines-List: Rotax Training Requirements and Your LSA The complete URL is: http://www.rainbowaviation.com/articles/draft%20rotax%20training.pdf Or as a tiny URL: http://tinyurl.com/yfgwjsr -- Craig -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee Sent: Wednesday, December 30, 2009 9:08 PM Subject: RotaxEngines-List: Rotax Training Requirements and Your LSA --> Rotax Training Requirements and Your LSA Don't be misinformed here is an article with the real facts. Be one of the informed on LSA maintenance and your Rotax engine. Article by Carol Carpenter of Rainbow Aviation. http://www.rainbowaviation.com/artic...20training.pdf This is a must read for the LSA community. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=279353#279353 ------------------------------------------------------------------------------------- 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.