---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 11/03/10: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 0. 12:20 AM - November List Fund Raiser (Matt Dralle) 1. 07:32 AM - WTB 912 guages (egp8111) 2. 10:38 AM - Re: Re: Prop Strike crank damage (bjones@dmv.com) 3. 10:54 AM - Re: Prop Strike crank damage (lucien) 4. 12:15 PM - Re: Re: Prop Strike crank damage (Richard Girard) 5. 12:37 PM - The morgans (Richard Girard) 6. 03:05 PM - Re: The morgans (FLYaDIVE) ________________________________ Message 0 _____________________________________ Time: 12:20:47 AM PST US From: Matt Dralle Subject: RotaxEngines-List: November List Fund Raiser There is an automatic "squelch button" of sorts for the Fund Raiser messages. Here's how it works... As soon as a List member makes a Contribution through the Matronics Fund Raiser web site, they will instantly cease to receive these Fund Raiser messages for the rest of the month! Its just that simple. I really do appreciate each and every one of your individual Contributions to support the Lists. It is your support that enables me to upgrade the hardware and software that are required to run a List Site such as this one. It also goes to pay for the commercial-grade Internet connection and to pay the huge electric bill to keep the computer gear running and the air conditioner powered on. I run all of the Matronics Email List and Forums sites here locally which allows me to control and monitor every aspect of the system for the utmost in reliably and performance. Your personal Contribution matters because, when combined with other Listers such as yourself, it pays the bills to keep this site up and running. I accept exactly ZERO advertising dollars for the Matronics Lists sites. I can't stand the pop-up ads and all other commercials that are so prevalent on the Internet these days and I particularly don't want to have it on my Email List sites. If you appreciate the ad-free, grass-roots, down-home feel of the Matronics Email Lists, please make a Contribution to keep it that way!! http://www.matronics.com/contribution Thank you! Matt Dralle Matronics Email List Administrator [Note that there are certain circumstances where you might still see a Contribution related message. For example, if someone replies to one of the messages, when using the List Browse feature, or when accessing List message via the Forum. The system keys on the given email address and since most of these are anonymous public access methods, there is no simple way to filter them.] ________________________________ Message 1 _____________________________________ Time: 07:32:16 AM PST US Subject: RotaxEngines-List: WTB 912 guages From: "egp8111" I'm looking for 912 guages (tach,oil psi,oil temp,cht) for my 912 re-engine project. If anyone has any they would like to sell please contact me thanks, EG Read this topic online here: http://forums.matronics.com/viewtopic.php?p=318031#318031 ________________________________ Message 2 _____________________________________ Time: 10:38:57 AM PST US Subject: Re: RotaxEngines-List: Re: Prop Strike crank damage From: bjones@dmv.com Re crank failure due to prop strike; MY info is second hand and limited to what was in the eai posts. Sorry. BJ Sent from my Verizon Wireless BlackBerry -----Original Message----- From: "vernon mitchell" Sender: owner-rotaxengines-list-server@matronics.com Subject: Re: RotaxEngines-List: Re: Prop Strike crank damage This is a multi-part message in MIME format. ________________________________ Message 3 _____________________________________ Time: 10:54:54 AM PST US Subject: RotaxEngines-List: Re: Prop Strike crank damage From: "lucien" I've always thought that a prop strike caused the "New Engine" light to come on in the panel.... ;) Couldn't you tell if the journals had been twisted with a timing check? I.e. with a dial indicator put into the SP hole and a protractor on the crank? Unless it was a new engine, I always figured a prop strike put you in the neighborhood of a new engine cost-wise anyway, so down to the bank... with a gun... ;) LS -------- LS Titan II SS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=318055#318055 ________________________________ Message 4 _____________________________________ Time: 12:15:31 PM PST US Subject: Re: RotaxEngines-List: Re: Prop Strike crank damage From: Richard Girard Lucien, all, I don't think we're talking anything more than a few thousandths of an inch of twist out of register in the crank before significant damage happens to the main bearings. As you look at the crank you can see that the front and rear main bearing segments each carry a rod journal and the center main bearing segment carries a rod journal on each side. Connecting those three segments are essentially just plates. Now refer to Rotax table of limits for measuring the crank. First, it's done at the magneto drive end of the crank, not at the gearbox end and the 100% wear limit is only .0007" ( 7 ten thousandths of an inch ) over the maximum allowed for a brand new crank. Without splitting the case, what assumption would you have to make about any given movement of an individual crank segment? That movement most likely occurs at the plate connecting the crank nose and the center segments? Or does it reflect through all segments equally? For simplicity let's say all movement happens at the plate between rod journal 1 and 2 so that you get a reading of .0034" at the mag end and to further simplify all movement happens on rod journal 1. Even if you had a perfect, zero spec crank to start with, you are only talking .0017". Measuring something at the top of the piston you'd have to decide how much, if any, variation could be accounted for by piston rock, wrist pin wear, rod journal wear, and rod bearing wear just to name a few. You could drive yourself nuts trying to factor in all those sources of measurement error, much less finding sine tables with enough accuracy to get measurement values and we haven't begun to think about movement caused by environmental factors not even related to the engine. Is the moon in the wrong position? Tide out or in? Okay, I'm kidding with the last, but you get the idea. Just to illustrate how difficult fine measurements like these can be, I have a precision level that I only use to set the bed of my engine lathe. It is so sensitive that the bubble will measure a change when I take a step. I cause the concrete pad on which the lathe sits to flex and the bubble moves. I don't drink coffee on the day I'm going to use it. Rick Girard On Wed, Nov 3, 2010 at 12:52 PM, lucien wrote: > lstavenhagen@hotmail.com> > > I've always thought that a prop strike caused the "New Engine" light to > come on in the panel.... ;) > > Couldn't you tell if the journals had been twisted with a timing check? > I.e. with a dial indicator put into the SP hole and a protractor on the > crank? > > Unless it was a new engine, I always figured a prop strike put you in the > neighborhood of a new engine cost-wise anyway, so down to the bank... with a > gun... ;) > > LS > > -------- > LS > Titan II SS > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=318055#318055 > > -- Zulu Delta Kolb Mk IIIC 582 Gray head 4.00 C gearbox 3 blade WD Thanks, Homer GBYM It is not bigotry to be certain we are right; but it is bigotry to be unable to imagine how we might possibly have gone wrong. - G.K. Chesterton ________________________________ Message 5 _____________________________________ Time: 12:37:30 PM PST US Subject: RotaxEngines-List: The morgans From: Richard Girard Does anyone besides me get a notice from the postmaster about themorgans@fairadsl.co.uk having a full mailbox when ever posting something to this forum? Could someone go tell them to either get off the list or clean out their mailbox. Rick Girard -- Zulu Delta Kolb Mk IIIC 582 Gray head 4.00 C gearbox 3 blade WD Thanks, Homer GBYM It is not bigotry to be certain we are right; but it is bigotry to be unable to imagine how we might possibly have gone wrong. - G.K. Chesterton ________________________________ Message 6 _____________________________________ Time: 03:05:06 PM PST US Subject: Re: RotaxEngines-List: The morgans From: FLYaDIVE Rick: I also have been getting all sorts of 'Postmaster' messages and I am not sure if my posts have been making it to the group. Barry On Wed, Nov 3, 2010 at 3:25 PM, Richard Girard wrote: > Does anyone besides me get a notice from the postmaster about > themorgans@fairadsl.co.uk having a full mailbox when ever posting > something to this forum? Could someone go tell them to either get off the > list or clean out their mailbox. > > Rick Girard > > -- > Zulu Delta > Kolb Mk IIIC > 582 Gray head > 4.00 C gearbox > 3 blade WD > Thanks, Homer GBYM > > It is not bigotry to be certain we are right; but it is bigotry to be > unable to imagine how we might possibly have gone wrong. > - G.K. Chesterton > > > * > > -- Barry "Chop'd Liver" ------------------------------------------------------------------------------------- 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.