---------------------------------------------------------- Zenith601-List Digest Archive --- Total Messages Posted Fri 04/24/09: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:58 AM - The breakups () 2. 01:51 PM - Destructive forces of flutter (hansriet) 3. 04:47 PM - ENGINE, ENGINE *9 (Tommy Walker) ________________________________ Message 1 _____________________________________ Time: 11:58:57 AM PST US From: Subject: Zenith601-List: The breakups I'm OK with various people having various interpretations and differing viewpoints, but in all I have read, I am still waiting for the following data: In each crash, has anybody identified the individual piece that failed? I seem to recall that one crash summary stated that the main spar had failed, and been twisted, but there seems to be a dearth of information on this. as in: if the rear spar tore loose from the carry-through, for instance, I'd look at either a thicker attach point plate, or two attach point plates, on either side of the carry-through and the spar. If it's flutter, then it seems reasonable to either pre-load the ailerons a couple of degrees down, or use push-pull tubes insttead of cables. If we're looking at excessive G, (positive or negative) then maybe more stringent elevator stops would be called for. If we're looking at excessive positive G, could that point to pilot error? I have a hard time believing that somebody could not know when he's pulling 4 or more G, no matter how light the stick force is. Since, I'm sure, the FAA and NTSB have a set of plans, I'd love to see a call-out of the part numbers that either failed or are broken, and are not attributable to ground impact. Until somebody comes up with that information, I guess I'll keep building, albeit at a slower pace. Paul Rodriguez ________________________________ Message 2 _____________________________________ Time: 01:51:47 PM PST US Subject: Zenith601-List: Destructive forces of flutter From: "hansriet" I don't want to put any fuel on the flames, and I don't know what the cause of the in-flight break up is. But the people who think that flutter is an innocent problem, and for those who claim on this list that they flight tested their zodiac trying to induce flutter, are invited to watch the video at the link posted below. Granted this is at high speeds, but it gives you an impression of how sudden and how destructive flutter can be. http://vids.myspace.com/index.cfm?fuseaction=vids.individual&VideoID=3452299 Hans Read this topic online here: http://forums.matronics.com/viewtopic.php?p=241119#241119 ________________________________ Message 3 _____________________________________ Time: 04:47:03 PM PST US Subject: Zenith601-List: ENGINE, ENGINE *9 From: "Tommy Walker" Listers, I am in the market for a Continental O-200 or a Rotax 912ULS I would appreciate any referrals. Thanks, Tommy Walker in Alabama Do Not Archive -------- Tommy Walker N8701 - Anniston, AL Read this topic online here: http://forums.matronics.com/viewtopic.php?p=241148#241148 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message zenith601-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Zenith601-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/zenith601-list Browse Digests http://www.matronics.com/digest/zenith601-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.