---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Fri 03/21/08: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:48 AM - Re: RotaxEngines-List Digest: 8 Msgs - 03/20/08 (Hugh) 2. 07:15 PM - Re: RotaxEngines-List Digest: 8 Msgs - 03/20/08 (Roger Lee) 3. 07:15 PM - Re: RotaxEngines-List Digest: 8 Msgs - 03/20/08 (Roger Lee) 4. 11:03 PM - Re: Does it have a Clutch? (Les Goldner) ________________________________ Message 1 _____________________________________ Time: 07:48:41 AM PST US From: "Hugh" Subject: RotaxEngines-List: RE: RotaxEngines-List Digest: 8 Msgs - 03/20/08 Les: I'm curious! Were the engine attaching bolts safety wired or not? My 912UL mounts to my Allegro 2000 with four bolts also, but they are required to be safety wired after the proper torque is applied. Hugh McKay Allegro 2000 912UL -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of RotaxEngines-List Digest Server Sent: Friday, March 21, 2008 1:57 AM Subject: RotaxEngines-List Digest: 8 Msgs - 03/20/08 * ================================================= Online Versions of Today's List Digest Archive ================================================= Today's complete RotaxEngines-List Digest can also be found in either of the two Web Links listed below. The .html file includes the Digest formatted in HTML for viewing with a web browser and features Hyperlinked Indexes and Message Navigation. The .txt file includes the plain ASCII version of the RotaxEngines-List Digest and can be viewed with a generic text editor such as Notepad or with a web browser. HTML Version: http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 08-03-20&Archive=RotaxEngines Text Version: http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 2008-03-20&Archive=RotaxEngines =============================================== EMail Version of Today's List Digest Archive =============================================== ---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Thu 03/20/08: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:55 AM - Re: AW: Re: 912 with low RPM--- new vibration problem-fixed (Les Goldner) 2. 11:34 AM - Re: AW: Re: 912 with low RPM--- new vibration problem-fixed (Jack Kuehn) 3. 03:41 PM - Re: AW: Re: 912 with low RPM--- new vibration problem-fixed (Les Goldner) 4. 04:03 PM - Does it have a Clutch? (Les Goldner) 5. 04:12 PM - Re: AW: Re: 912 with low RPM--- new vibration problem-fixed (Jack Kuehn) 6. 04:37 PM - Re: Does it have a Clutch? (Bill and Marsha) 7. 07:06 PM - Re: Does it have a Clutch? (Les Goldner) 8. 09:28 PM - AW: Re: 912 with low RPM--- new vibration problem-fixed (Roger Lee) ________________________________ Message 1 _____________________________________ Time: 10:55:56 AM PST US From: "Les Goldner" Subject: RE: RotaxEngines-List: AW: Re: 912 with low RPM--- new vibration problem-fixed The vibration problem was not due to prop balance. It was a combination of slightly loose bolts that mount the 912 engine and a slightly off carb sync. The mechanic told me that the bottom-only mounts will loosen up because the engine isn't support right. Unless you add mounts on top of the engine these bolts need serious attention. He suggested changing the four 10mm bolts to studs and using lock washers, which he said won't loosen. Les > -----Original Message----- > From: owner-rotaxengines-list-server@matronics.com > [mailto:owner-rotaxengines-list-server@matronics.com] On > Behalf Of Thom Riddle > Sent: Sunday, March 16, 2008 11:33 AM > To: rotaxengines-list@matronics.com > Subject: RotaxEngines-List: AW: Re: 912 with low RPM--- new > vibration problem > > --> > > Gtblu, > > In answer to your question about vibration smoothing out at > 5400 rpm, yes, it is possible. As the centrifugal forces > increase with increasing rpm, the apparent out-of-trackness > at places other than the tip could disappear. Do you know > which blade is running out of track? You might consider > removing the blades and comparing them to each other on a > true flat surface in several directions. If one of them is > measurably out of synch with the others that could be your > problem and a blade replacement might resolve the issue. > > -------- > Thom Riddle > N221FA Allegro 2000 912UL > N197BG FS1/447 > -------------------- > Believe nothing, no matter where you read it or who has said > it, not even if I have said it, unless it agrees with your > own reason and your own common sense. > - Buddha > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=170197#170197 > > > > > > > > Photoshare, and much much more: > > ________________________________ Message 2 _____________________________________ Time: 11:34:15 AM PST US From: "Jack Kuehn" Subject: Re: RotaxEngines-List: AW: Re: 912 with low RPM--- new vibration problem-fixed What airplane is your Rotax in? Sorry, I've lost track!! Jack On Thu, Mar 20, 2008 at 11:51 AM, Les Goldner wrote: > > The vibration problem was not due to prop balance. It was a combination of > slightly loose bolts that mount the 912 engine and a slightly off carb sync. > The mechanic told me that the bottom-only mounts will loosen up because the > engine isn't support right. Unless you add mounts on top of the engine these > bolts need serious attention. He suggested changing the four 10mm bolts to > studs and using lock washers, which he said won't loosen. > Les > > > -----Original Message----- > > From: owner-rotaxengines-list-server@matronics.com > > [mailto:owner-rotaxengines-list-server@matronics.com] On > > Behalf Of Thom Riddle > > Sent: Sunday, March 16, 2008 11:33 AM > > To: rotaxengines-list@matronics.com > > Subject: RotaxEngines-List: AW: Re: 912 with low RPM--- new > > vibration problem > > > > --> > > > > Gtblu, > > > > In answer to your question about vibration smoothing out at > > 5400 rpm, yes, it is possible. As the centrifugal forces > > increase with increasing rpm, the apparent out-of-trackness > > at places other than the tip could disappear. Do you know > > which blade is running out of track? You might consider > > removing the blades and comparing them to each other on a > > true flat surface in several directions. If one of them is > > measurably out of synch with the others that could be your > > problem and a blade replacement might resolve the issue. > > > > -------- > > Thom Riddle > > N221FA Allegro 2000 912UL > > N197BG FS1/447 > > -------------------- > > Believe nothing, no matter where you read it or who has said > > it, not even if I have said it, unless it agrees with your > > own reason and your own common sense. > > - Buddha > > > > > > > > > > Read this topic online here: > > > > http://forums.matronics.com/viewtopic.php?p=170197#170197 > > > > > > > > > > > > > > > > Photoshare, and much much more: > > > > > > ________________________________ Message 3 _____________________________________ Time: 03:41:08 PM PST US From: "Les Goldner" Subject: RE: RotaxEngines-List: AW: Re: 912 with low RPM--- new vibration problem-fixed Jack, The plane is a Zenith CH701 STOL/bush plane with 20 hours on it. I have attached a picture but don't know if Matronics will post it. Zenith came out with a better 912 mounting arrangement this year, but I don't want to spend the bucks and time it would take to install it. Les > -----Original Message----- > From: owner-rotaxengines-list-server@matronics.com > [mailto:owner-rotaxengines-list-server@matronics.com] On > Behalf Of Jack Kuehn > Sent: Thursday, March 20, 2008 11:31 AM > To: rotaxengines-list@matronics.com > Subject: Re: RotaxEngines-List: AW: Re: 912 with low RPM--- > new vibration problem-fixed > > --> > > What airplane is your Rotax in? Sorry, I've lost track!! > > Jack > > On Thu, Mar 20, 2008 at 11:51 AM, Les Goldner > wrote: > > --> > > > > The vibration problem was not due to prop balance. It was a > > combination of slightly loose bolts that mount the 912 > engine and a slightly off carb sync. > > The mechanic told me that the bottom-only mounts will loosen up > > because the engine isn't support right. Unless you add > mounts on top > > of the engine these bolts need serious attention. He suggested > > changing the four 10mm bolts to studs and using lock > washers, which he said won't loosen. > > Les > > > > > -----Original Message----- > > > From: owner-rotaxengines-list-server@matronics.com > > > [mailto:owner-rotaxengines-list-server@matronics.com] On > > Behalf > > Of Thom Riddle > Sent: Sunday, March 16, 2008 11:33 AM > To: > > rotaxengines-list@matronics.com > Subject: > RotaxEngines-List: AW: Re: > > 912 with low RPM--- new > vibration problem > > --> > > > --> > > > > > > Gtblu, > > > > > > In answer to your question about vibration smoothing out > at > 5400 > > rpm, yes, it is possible. As the centrifugal forces > > increase with > > increasing rpm, the apparent out-of-trackness > at places > other than > > the tip could disappear. Do you know > which blade is > running out of > > track? You might consider > removing the blades and > comparing them to > > each other on a > true flat surface in several directions. > If one of > > them is > measurably out of synch with the others that > could be your > > > problem and a blade replacement might resolve the issue. > > > > > > -------- > > > Thom Riddle > > > N221FA Allegro 2000 912UL > > > N197BG FS1/447 > > > -------------------- > > > Believe nothing, no matter where you read it or who has > said > it, > > not even if I have said it, unless it agrees with your > > own reason > > and your own common sense. > > > - Buddha > > > > > > > > > > > > > > > Read this topic online here: > > > > > > http://forums.matronics.com/viewtopic.php?p=170197#170197 > > > > > > > > > > > > > > > > > > > > > > > > Photoshare, and much much more: > > > > > > > > > > > > > > > > > > > > Photoshare, and much much more: > > ________________________________ Message 4 _____________________________________ Time: 04:03:18 PM PST US From: "Les Goldner" Subject: RotaxEngines-List: Does it have a Clutch? How can I find out if my 912ULS includes a clutch? I understand that Rotax started including them with all 912s about the time my engine was purchased, about 4-years ago. Since I purchased it, unused, with my Zenith kit (it now has about 25 hours on it) I never got any documentation about this. I have been told that, with a clutch, the engine would do a lot better in a prop strike. The engine's SR is 5643233. Thanks, Les ________________________________ Message 5 _____________________________________ Time: 04:12:30 PM PST US From: "Jack Kuehn" Subject: Re: RotaxEngines-List: AW: Re: 912 with low RPM--- new vibration problem-fixed The picture came through fine. Nice Airplane!!! On Thu, Mar 20, 2008 at 4:38 PM, Les Goldner wrote: > Jack, > The plane is a Zenith CH701 STOL/bush plane with 20 hours on it. I have > attached a picture but don't know if Matronics will post it. Zenith came out > with a better 912 mounting arrangement this year, but I don't want to spend > the bucks and time it would take to install it. > > Les > > > -----Original Message----- > > From: owner-rotaxengines-list-server@matronics.com > > [mailto:owner-rotaxengines-list-server@matronics.com] On > > > Behalf Of Jack Kuehn > > Sent: Thursday, March 20, 2008 11:31 AM > > To: rotaxengines-list@matronics.com > > Subject: Re: RotaxEngines-List: AW: Re: 912 with low RPM--- > > new vibration problem-fixed > > > > --> > > > > > > What airplane is your Rotax in? Sorry, I've lost track!! > > > > Jack > > > > On Thu, Mar 20, 2008 at 11:51 AM, Les Goldner > > wrote: > > > --> > > > > > > The vibration problem was not due to prop balance. It was a > > > combination of slightly loose bolts that mount the 912 > > engine and a slightly off carb sync. > > > The mechanic told me that the bottom-only mounts will loosen up > > > because the engine isn't support right. Unless you add > > mounts on top > > > of the engine these bolts need serious attention. He suggested > > > changing the four 10mm bolts to studs and using lock > > washers, which he said won't loosen. > > > Les > > > > > > > -----Original Message----- > > > > From: owner-rotaxengines-list-server@matronics.com > > > > [mailto:owner-rotaxengines-list-server@matronics.com] On > > > Behalf > > > Of Thom Riddle > Sent: Sunday, March 16, 2008 11:33 AM > To: > > > rotaxengines-list@matronics.com > Subject: > > RotaxEngines-List: AW: Re: > > > 912 with low RPM--- new > vibration problem > > --> > > > > --> > > > > > > > > Gtblu, > > > > > > > > In answer to your question about vibration smoothing out > > at > 5400 > > > rpm, yes, it is possible. As the centrifugal forces > > > increase with > > > increasing rpm, the apparent out-of-trackness > at places > > other than > > > the tip could disappear. Do you know > which blade is > > running out of > > > track? You might consider > removing the blades and > > comparing them to > > > each other on a > true flat surface in several directions. > > If one of > > > them is > measurably out of synch with the others that > > could be your > > > > problem and a blade replacement might resolve the issue. > > > > > > > > -------- > > > > Thom Riddle > > > > N221FA Allegro 2000 912UL > > > > N197BG FS1/447 > > > > -------------------- > > > > Believe nothing, no matter where you read it or who has > > said > it, > > > not even if I have said it, unless it agrees with your > > > own reason > > > and your own common sense. > > > > - Buddha > > > > > > > > > > > > > > > > > > > > Read this topic online here: > > > > > > > > http://forums.matronics.com/viewtopic.php?p=170197#170197 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Photoshare, and much much more: > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Photoshare, and much much more: > > > > > ________________________________ Message 6 _____________________________________ Time: 04:37:16 PM PST US From: "Bill and Marsha" Subject: Re: RotaxEngines-List: Does it have a Clutch? Les You can tell by the part# of the gearbox, the # will be stamped on the top of the gearbox. 888-560 = no clutch 887-712 = with clutch. If your # is other, I can probably cross check. Doc ----- Original Message ----- From: Les Goldner To: rotaxengines-list@matronics.com Sent: Thursday, March 20, 2008 5:59 PM Subject: RotaxEngines-List: Does it have a Clutch? How can I find out if my 912ULS includes a clutch? I understand that Rotax started including them with all 912s about the time my engine was purchased, about 4-years ago. Since I purchased it, unused, with my Zenith kit (it now has about 25 hours on it) I never got any documentation about this. I have been told that, with a clutch, the engine would do a lot better in a prop strike. The engine's SR is 5643233. Thanks, Les ________________________________ Message 7 _____________________________________ Time: 07:06:33 PM PST US From: "Les Goldner" Subject: RE: RotaxEngines-List: Does it have a Clutch? Thanks Doc, I'll check the number next time I'm at the airport. Les _____ From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Bill and Marsha Sent: Thursday, March 20, 2008 4:33 PM Subject: Re: RotaxEngines-List: Does it have a Clutch? Les You can tell by the part# of the gearbox, the # will be stamped on the top of the gearbox. 888-560 = no clutch 887-712 = with clutch. If your # is other, I can probably cross check. Doc ----- Original Message ----- From: Les Goldner Sent: Thursday, March 20, 2008 5:59 PM Subject: RotaxEngines-List: Does it have a Clutch? How can I find out if my 912ULS includes a clutch? I understand that Rotax started including them with all 912s about the time my engine was purchased, about 4-years ago. Since I purchased it, unused, with my Zenith kit (it now has about 25 hours on it) I never got any documentation about this. I have been told that, with a clutch, the engine would do a lot better in a prop strike. The engine's SR is 5643233. Thanks, Les href="http://www.matronics.com/Navigator?RotaxEngines-List">http://www.matro nics.com/Navigator?RotaxEngines-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c ________________________________ Message 8 _____________________________________ Time: 09:28:15 PM PST US Subject: RotaxEngines-List: AW: Re: 912 with low RPM--- new vibration problem-fixed From: "Roger Lee" Congratulations Les, I know that chasing a ghost can be very frustrating to say the least. Your problem solving will help us all identify issues and where to look when the answer is not obvious. -------- Roger Lee Tucson, Az. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=171420#171420 ________________________________ Message 2 _____________________________________ Time: 07:15:16 PM PST US Subject: RotaxEngines-List: Re: RotaxEngines-List Digest: 8 Msgs - 03/20/08 From: "Roger Lee" Depends on the Mfg. of that particular plane. -------- Roger Lee Tucson, Az. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=171637#171637 ________________________________ Message 3 _____________________________________ Time: 07:15:18 PM PST US Subject: RotaxEngines-List: Re: RotaxEngines-List Digest: 8 Msgs - 03/20/08 From: "Roger Lee" Depends on the Mfg. of that particular plane. -------- Roger Lee Tucson, Az. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=171636#171636 ________________________________ Message 4 _____________________________________ Time: 11:03:26 PM PST US From: "Les Goldner" Subject: RE: RotaxEngines-List: Does it have a Clutch? Doc, My gearbox part number is 887-703. Clutch, or no clutch? ...and how do you find this information? Thanks, Les _____ From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Bill and Marsha Sent: Thursday, March 20, 2008 4:33 PM Subject: Re: RotaxEngines-List: Does it have a Clutch? Les You can tell by the part# of the gearbox, the # will be stamped on the top of the gearbox. 888-560 = no clutch 887-712 = with clutch. If your # is other, I can probably cross check. Doc ----- Original Message ----- From: Les Goldner Sent: Thursday, March 20, 2008 5:59 PM Subject: RotaxEngines-List: Does it have a Clutch? How can I find out if my 912ULS includes a clutch? I understand that Rotax started including them with all 912s about the time my engine was purchased, about 4-years ago. Since I purchased it, unused, with my Zenith kit (it now has about 25 hours on it) I never got any documentation about this. I have been told that, with a clutch, the engine would do a lot better in a prop strike. The engine's SR is 5643233. Thanks, Les href="http://www.matronics.com/Navigator?RotaxEngines-List">http://www.matro nics.com/Navigator?RotaxEngines-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c ------------------------------------------------------------------------------------- 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.