---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sun 05/17/09: 11 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:16 AM - alternative carb for 912 (Thom Riddle) 2. 05:09 AM - Re: alternative carb for 912 (Matt Tucciarone) 3. 07:24 AM - EGT Temps (george may) 4. 09:13 AM - Re: EGT Temps (Ollie Washburn) 5. 09:13 AM - 912 voltage? (Les Goldner) 6. 10:31 AM - Rotax 912 - interesting observation (Thilo Kind) 7. 10:41 AM - Re: 912 voltage? (lucien) 8. 10:46 AM - Re: Rotax 912 - interesting observation (lucien) 9. 10:55 AM - Re: 447 mid-range rough running (Dave Kulp) 10. 02:11 PM - Re: EGT Temps (george may) 11. 10:21 PM - Re: EGT Temps (Kitfox George) ________________________________ Message 1 _____________________________________ Time: 04:16:06 AM PST US Subject: RotaxEngines-List: alternative carb for 912 From: "Thom Riddle" Has anyone on this list every tried adapting a different carburetor (single) to the Rotax 912 series engine? If so, I'd like to hear anything/everything you've learned in the process? -------- 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=244342#244342 ________________________________ Message 2 _____________________________________ Time: 05:09:57 AM PST US From: "Matt Tucciarone" Subject: RE: RotaxEngines-List: alternative carb for 912 There was a guy, who is form California, who sells a fuel injection bolt on for the 912 and 914 but it cost about $8,000. I was talking to him at Sun and Fun. He uses some of the military stuff that comes off of the predator drones. He says his 914 puts out 150hp. Cool idea but if you bolt one of these things on you engine, forget about any support from Rotax. Has anyone on this list every tried adapting a different carburetor (single) to the Rotax 912 series engine? If so, I'd like to hear anything/everything you've learned in the process? -------- 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=244342#244342 ________________________________ Message 3 _____________________________________ Time: 07:24:51 AM PST US From: george may Subject: RotaxEngines-List: EGT Temps Can someone tell me what the expected max and min temperatures for EGT on t he 912uls. Trying to set up my Dynon--- Thanks George May 601XL 912s _________________________________________________________________ Insert movie times and more without leaving Hotmail=AE. http://windowslive.com/Tutorial/Hotmail/QuickAdd?ocid=TXT_TAGLM_WL_HM_Tut orial_QuickAdd1_052009 ________________________________ Message 4 _____________________________________ Time: 09:13:45 AM PST US Subject: Re: RotaxEngines-List: EGT Temps From: Ollie Washburn CHT----275 170-230 OIL T--265 max 190-230 OIL P-- 30-73 FUEL P-- 2.2--5.8 H2O--275 max/Evans EHT--1615 max 1560 Cr max RPM--5800 48K-5500 IDLE MIN 1600 Ollie On Sun, May 17, 2009 at 10:23 AM, george may wrote: > > Can someone tell me what the expected max and min temperatures for EGT on > the 912uls. Trying to set up my Dynon--- > > Thanks > George May > 601XL 912s > > ________________________________ > Insert movie times and more without leaving Hotmail. See how. > > ________________________________ Message 5 _____________________________________ Time: 09:13:45 AM PST US From: "Les Goldner" Subject: RotaxEngines-List: 912 voltage? I am a sport pilot and don't fly at night, but went up in my experimental Zenith Rotax 912 powered ship last evening. With all the extra night time stuff on (strobe, landing light (55watt), & cabin lights) the voltage went down to 11.9 at 3500-rpm and 12.3V at my 4900-rpm cruse. Is this normal or do I have voltage regulation issues? Without the extra load my voltage runs about 12.9-13.0 V and my battery is holding 12.8V when I fly during the day. I don't have an alternator and just use the Rotax coils for power. Thanks for your advice. Les ________________________________ Message 6 _____________________________________ Time: 10:31:42 AM PST US From: "Thilo Kind" Subject: RotaxEngines-List: Rotax 912 - interesting observation Hi folks, went to the airfield today for a short flight with my Zodiac CH 601 HDS with Rotax 912 UL. During the pre-flight two of my flying buddies came up. One of them started to turn the prop for the oil check. He remarked how 'easy' it was to turn the prop. His plane is also equipped with a 912 UL, but the compression stroke is much, much more pronounced on his airplane. We actually did a side-by side comparison. My engine (120 hours) has been like this since new. It runs fine; the Zodiac is one of the faster ones in this class. I haven't checked the compression yet, but oil consumption is very low (no need to re-fill between annuals). Fuel consumption is also in the normal range. I believe the engine is just fine. However, does anybody have an explanation for that? Thanks Thilo ________________________________ Message 7 _____________________________________ Time: 10:41:51 AM PST US Subject: RotaxEngines-List: Re: 912 voltage? From: "lucien" lgold(at)quantum-associat wrote: > I am a sport pilot and dont fly at night, but went up in my experimental Zenith Rotax 912 powered ship last evening. With all the extra night time stuff on (strobe, landing light (55watt), & cabin lights) the voltage went down to 11.9 at 3500-rpm and 12.3V at my 4900-rpm cruse. Is this normal or do I have voltage regulation issues? Without the extra load my voltage runs about 12.9-13.0 V and my battery is holding 12.8V when I fly during the day. I dont have an alternator and just use the Rotax coils for power. > Thanks for your advice. > Les > Yep, sounds normal to me. The 912 alternator is capable of only about 250W output and probably does less than that on a continuous basis. I get about the same readings when I have my whelen strobes and landing light going. The lighting coil alternator is only able to keep up with my panel/radio and my strobes and that's about it. Once I turn on more stuff it falls behind and starts getting into the battery (i.e. drops below 12V and into the 11's). Keep in mind also that the stock Ducati voltage regulator that comes with the 912 is a piece of junk, it can't take continuous high duty-cycle operation for long periods of time - at continuous loads like that it'll eventually literally burn out. I.e. put your hand on it after a flight with all your electrics on it and it'll be smoking hot. I'm working on a computer fan installation to put over mine, supposedly extra cooling will help keep it from smoking it's little garbagy, 170 buck self to death.... LS -------- LS Titan II SS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=244400#244400 ________________________________ Message 8 _____________________________________ Time: 10:46:40 AM PST US Subject: RotaxEngines-List: Re: Rotax 912 - interesting observation From: "lucien" thilo.kind(at)gmx.net wrote: > Hi folks, > > went to the airfield today for a short flight with my Zodiac CH 601 HDS with > Rotax 912 UL. During the pre-flight two of my flying buddies came up. One of > them started to turn the prop for the oil check. He remarked how 'easy' it > was to turn the prop. His plane is also equipped with a 912 UL, but the > compression stroke is much, much more pronounced on his airplane. We > actually did a side-by side comparison. > > My engine (120 hours) has been like this since new. It runs fine; the Zodiac > is one of the faster ones in this class. I haven't checked the compression > yet, but oil consumption is very low (no need to re-fill between annuals). > Fuel consumption is also in the normal range. I believe the engine is just > fine. However, does anybody have an explanation for that? > > Thanks > > Thilo Does your friend have the 100 horse version? I.e. the 912ULS? That motor has a bigger bore and higher compression so it should be stiffer than the 912UL by a fair bit. Even so, on my 912ULS, one cylinder always feels really soft when cranking it over, but the compressions have always measured perfect and the motor runs fine. I'd do a leak down on it if you're concerned about it just to make sure everything's ok.... LS -------- LS Titan II SS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=244401#244401 ________________________________ Message 9 _____________________________________ Time: 10:55:59 AM PST US From: Dave Kulp Subject: Re: RotaxEngines-List: 447 mid-range rough running Folks, Thanks lots for the info about the mid-range roughness. I now have some experience to go on whereas before I had about zero. Next week I'll go over it with the recs I've gotten from you and if it still doesn't run well the carb comes off for overhaul. Also, the method of installing the spring is great. That's one of those "why didn't I think of that" deals. Thanks so much! Best, Dave Kulp ________________________________ Message 10 ____________________________________ Time: 02:11:17 PM PST US From: george may Subject: RE: RotaxEngines-List: EGT Temps Thanks Ollie----that's what I needed > Date: Sun=2C 17 May 2009 11:57:29 -0400 > Subject: Re: RotaxEngines-List: EGT Temps > From: ollies7s@gmail.com > To: rotaxengines-list@matronics.com > om> > > CHT----275 > 170-230 > OIL T--265 max > 190-230 > OIL P-- > 30-73 > FUEL P-- > 2.2--5.8 > H2O--275 max/Evans > EHT--1615 max > 1560 Cr max > RPM--5800 > 48K-5500 > IDLE MIN > 1600 > Ollie > > > > > > > > On Sun=2C May 17=2C 2009 at 10:23 AM=2C george may wrote: > > > > Can someone tell me what the expected max and min temperatures for EGT on > > the 912uls. Trying to set up my Dynon--- > > > > Thanks > > George May > > 601XL 912s > > > > ________________________________ > > Insert movie times and more without leaving Hotmail=AE. See how. > > > > > > > > =========== =========== =========== =========== > > > _________________________________________________________________ Hotmail=AE has a new way to see what's up with your friends. http://windowslive.com/Tutorial/Hotmail/WhatsNew?ocid=TXT_TAGLM_WL_HM_Tut orial_WhatsNew1_052009 ________________________________ Message 11 ____________________________________ Time: 10:21:25 PM PST US From: Kitfox George Subject: Re: RotaxEngines-List: EGT Temps EGT for 912=0A=0ARotax Installation Manual under exhaust systems section 11 .2=0A=0AEGT:=0ANormal---- 1470 f=0AMax--- ---- 1560 f =0ATake off--- 1616 f=0AGeorge =0A=0A=0ASport Model - 914 / painting complete 5/1/09=0Ado not archive =0A=0A=0A=0A=0A___________________________ _____=0AFrom: george may =0ATo: rotaxengines-list@mat ronics.com=0ASent: Sunday, May 17, 2009 2:10:05 PM=0ASubject: RE: RotaxEngi nes-List: EGT Temps=0A=0AThanks Ollie----that's what I needed=0A=0A> Date: Sun, 17 May 2009 11:57:29 -0400=0A> Subject: Re: RotaxEngines-List: EGT Tem ps=0A> From: ollies7s@gmail.com=0A> To: rotaxengines-list@matronics.com=0A> il.com>=0A> =0A> CHT----275=0A> 170-230=0A> OIL T--265 max=0A> 190-230=0A> OIL P--=0A> 30-73=0A> FUEL P--=0A> 2.2--5.8=0A> H2O--275 max/Evans=0A> EHT- -1615 max=0A> 1560 Cr max=0A> RPM--5800=0A> 48K-5500=0A> IDLE MIN=0A> 1600 =0A> Ollie=0A> =0A> =0A> =0A> =0A> =0A> =0A> =0A> On Sun, May 17, 2009 at 1 0:23 AM, george may wrote:=0A> >=0A> > Can someone t ell me what the expected max and min temperatures for EGT on=0A> > the 912u ls. Trying to set up my Dynon---=0A> >=0A> > Thanks=0A> > George May=0A> > 601XL- 912s=0A> >=0A> > ________________________________=0A> > Insert mov ie times and more without leaving Hotmail=AE. See how.=0A> >=0A> >=0A> >=0A >====================0A> =0A> =0A> =0A=0A________________________________=0AHotmail=AE has a new way to see wh -======================== ------------------------------------------------------------------------------------- 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.