---------------------------------------------------------- Zenith-List Digest Archive --- Total Messages Posted Sun 05/27/07: 14 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:03 AM - Re: Updated Construction Standards for Zenair Light Airplanes (Craig Payne) 2. 02:07 AM - Re: Composite Gear (Martin Pohl) 3. 04:58 AM - Re: More Press Coverage on G-YOXI (Paul Mulwitz) 4. 06:04 AM - Re: Lower engine mounts (Gary Boothe) 5. 06:49 AM - Re: Lower engine mounts (LarryMcFarland) 6. 07:46 AM - Re: Lower engine mounts (Craig Payne) 7. 08:13 AM - Re: Need Handheld Radio Installation (Gary Ray) 8. 08:39 AM - Re: Lower engine mounts (LarryMcFarland) 9. 12:21 PM - Rotax912ULS/ZodiacXL - selection of propeller??? (Martin Pohl) 10. 02:22 PM - Re: Rotax912ULS/ZodiacXL - selection of propeller??? (LarryMcFarland) 11. 03:09 PM - Re: Rotax912ULS/ZodiacXL - selection of propeller??? (robert stone) 12. 07:44 PM - Re: N5SL Video Update (Ron Lendon) 13. 10:23 PM - Re: Need Handheld Radio Installation (jetboy) 14. 10:41 PM - Re: Crash (Flydog1966@aol.com) ________________________________ Message 1 _____________________________________ Time: 12:03:37 AM PST US From: "Craig Payne" Subject: RE: Zenith-List: Updated Construction Standards for Zenair Light Airplanes Well, I don't know if I have missed a release since the Jan 23rd edition but it has grown from 18 to 42 pages. Aside from the "index" (really a TOC) there are new sections on turnbuckles & nico press, bushings. The existing sections have doubled in length with some reordering of the information. -- Craig ________________________________ Message 2 _____________________________________ Time: 02:07:27 AM PST US Subject: Zenith-List: Re: Composite Gear From: "Martin Pohl" Kevin: This is one of the European XLs built (or kit provided) by CZAW. I have similar gear legs myself (although for the 3-gear-config). The attachment of the gear is different to the original ZAC, so a refitting of the composite gear legs is probably not feasible. Cheers Martin CH601XL "HB-YNA" -------- Martin Pohl Zodiac XL QBK 8645 Jona, Switzerland www.pohltec.ch/ZodiacXL Read this topic online here: http://forums.matronics.com/viewtopic.php?p=115033#115033 ________________________________ Message 3 _____________________________________ Time: 04:58:36 AM PST US From: Paul Mulwitz Subject: Re: Zenith-List: More Press Coverage on G-YOXI At 10:41 AM 5/23/2007, you wrote: >Didn't Zenith cut their ties to CZAW a while back...? Yes, but . . . I wouldn't have chosen that way to describe the break-up. CZAW stopped making Zodiacs around the same time as they introduced their own line of airplanes including one similar in outward appearance to the Zodiac. They also introduced the Parrot and Mermaid. Paul XL fuselage do not archive ________________________________ Message 4 _____________________________________ Time: 06:04:30 AM PST US From: "Gary Boothe" Subject: RE: Zenith-List: Lower engine mounts Rich, That might be a better question on the Corvair List, but it seems to me that William has said that that is normal and of little concern....guess it depends on how far off the holes were. Gary Boothe Cool, CA 601 HDSTD, WW Conversion 90% done, Tail done, wings done, working on c-section -----Original Message----- From: owner-zenith-list-server@matronics.com [mailto:owner-zenith-list-server@matronics.com] On Behalf Of Richard Vetterli Sent: Saturday, May 26, 2007 8:47 PM Subject: Zenith-List: Lower engine mounts Has anybody had trouble fitting the lower engine mounts? When they are attached to the firewall as per the plans, but the mounts don't seem to quite center over the lower longerons. It seems that the front angle of the brackets are a little too flat and they don't want to follow the angle of the longerons. With a little force, I can spread them out a little, but that doesn't seem right on such a critical part. Any ideas? Rich Vetterli 601XL/Corvair Check out my progress at: www.geocities.com/stixx5a http://farechase.yahoo.com/ ________________________________ Message 5 _____________________________________ Time: 06:49:41 AM PST US From: LarryMcFarland Subject: Re: Zenith-List: Lower engine mounts Richard, The conventional thing is to off set the engine angle to compensate for propeller torque and perhaps this is what you're looking at. My Subaru is pivoted 2-1/2 degrees from the front propeller mounting flange swinging the rear of the engine to keep the prop centered on the completed cowl nose. If it's a case of a tensioned fit, you need to specify how much flex is required for the task. In some cases, where a mount is not quite right, the part can be flexed to a correct position and then a torch is used to relieve the pressure at the area of bend. One has to be careful during this kind of operation though to not use too much heat and to be sure it's properly placed. I looked at the mount picture on your site. You might want to consult with WW on this design specific area. Very nice site by the way. Larry McFarland at www.macsmachine.com Richard Vetterli wrote: > > Has anybody had trouble fitting the lower engine > mounts? When they are attached to the firewall as per > the plans, but the mounts don't seem to quite center > over the lower longerons. It seems that the front > angle of the brackets are a little too flat and they > don't want to follow the angle of the longerons. With > a little force, I can spread them out a little, but > that doesn't seem right on such a critical part. Any > ideas? > Rich Vetterli > 601XL/Corvair > Check out my progress at: www.geocities.com/stixx5a > > > > > > ________________________________ Message 6 _____________________________________ Time: 07:46:52 AM PST US From: "Craig Payne" Subject: RE: Zenith-List: Lower engine mounts Coincidentally I was drilling holes in my lower engine mounts last night. I think the other responders have missed the mark. This has nothing to do with what is forward of the firewall. On *one* of my mounts if you stick a washer and nut on the mount bolt (forward of the firewall) and tighten it then the bracket to the rear of the firewall does not align with the lower longeron. In other words it is impossible to put the two small AN3 bolts through the bracket and longeron in a way that respects edge distances. On the other mount when I do this the bracket aligns with the longeron and I can center the two AN3s laterally in the bracket and longeron. The latest lower motor mounts come undrilled and the mount bolt is not welded on. So I see two places where adjustment can be made. You can adjust the position of the hole for the mount bolt side-to-side to best align the bracket with the longeron. And you can bend the bracket a little. I agree, bending such a critical part makes me uneasy too. I think it is worth a query to the factory. One question I have is that since we are dealing with an AN3 bolt through a piece of 0.050" 4130 steel and not a rivet in a piece of thin 6061-T6 aluminum what is the minimum edge distance? -- Craig ________________________________ Message 7 _____________________________________ Time: 08:13:11 AM PST US From: "Gary Ray" Subject: Re: Zenith-List: Need Handheld Radio Installation Anybody have a picture or ideas of a (neat/clever) backup handheld radio intallation with an external antenna? My main radio is an Xcom and my back up radio is an Icom A-24 nav/com handheld. I have a dedicated external whip antenna for the handheld. I have not had the 'Aha' idea yet but it would be nice to tame the spagetti cable look. Gary Ray 601XL ________________________________ Message 8 _____________________________________ Time: 08:39:04 AM PST US From: LarryMcFarland Subject: Re: Zenith-List: Lower engine mounts Craig, The stress tolerated by an edge distance of one bolt diameter is 2 x .050 times the minimum actual distance from the .375 hole to the edge of a 70K material. Or in this case, approx 2625 lbs using 70K as an understated base material strength, given that it's been welded and adjusted, etc. How that is affected by loading depends on the engine weight and shared loads of other connections. For steel, these details have to be calculated to minimize weight versus strength for required loads. I don't believe there is a rule of thumb here as set out by CH and the Mfr community for riveted aluminum connections. Larry McFarland Craig Payne wrote: > One question I have is that since we are dealing with an AN3 bolt through a > piece of 0.050" 4130 steel and not a rivet in a piece of thin 6061-T6 > aluminum what is the minimum edge distance? > > -- Craig > > > ________________________________ Message 9 _____________________________________ Time: 12:21:13 PM PST US Subject: Zenith-List: Rotax912ULS/ZodiacXL - selection of propeller??? From: "Martin Pohl" Hi folks I have to decide on which propeller to install in my Zodiac XL very soon. I did a search through this forum and got some good information about different propeller installations. Nevertheless I am specifically interested in Rotax 912ULS-powered planes (which prop do you use, what performance do you get). I still don't know whether I go for a fixed pitch or a constant speed prop. Looking forward to getting some advice!!! Cheers Martin CH601XL "HB-YNA" -------- Martin Pohl Zodiac XL QBK 8645 Jona, Switzerland www.pohltec.ch/ZodiacXL Read this topic online here: http://forums.matronics.com/viewtopic.php?p=115075#115075 ________________________________ Message 10 ____________________________________ Time: 02:22:56 PM PST US From: LarryMcFarland Subject: Re: Zenith-List: Rotax912ULS/ZodiacXL - selection of propeller??? Hi Martin, Your question speaks to a desire to go as fast as we all do, but the fixed pitch prop will only give you a narrow range of performance at top end if you select it that way and if you need to get out "short" you'd wish you had considered this beforehand. I've also had my Warp Drive adjustable at the low end and it will tear you out of the weeds of a short strip with amazing pull that is not available at the long end of its pitch range. I'd recommend you consider the adjustable prop for the strength of a good long pitch or a short one as your flying demands change. I believe a fixed pitch is a gamble on one that compromises best speed and best short field. I really do like the Warp Drive 70 inch tri-blade with a large spinner. I've seen 133 top end with my Subaru lightly loaded with just me and 24 gallons fuel and 17 degree pitch. I've the thick HDS wings so you'd probably be a bit faster in your XL. http://www.macsmachine.com/images/completion/full/601ezclosefrtrt.gif Larry McFarland 601HDS at www.macsmachine.com Martin Pohl wrote: > > Hi folks > > I have to decide on which propeller to install in my Zodiac XL very soon. I did a search through this forum and got some good information about different propeller installations. > > Nevertheless I am specifically interested in Rotax 912ULS-powered planes (which prop do you use, what performance do you get). I still don't know whether I go for a fixed pitch or a constant speed prop. > > Looking forward to getting some advice!!! > > Cheers Martin > CH601XL "HB-YNA" > > -------- > Martin Pohl > Zodiac XL QBK > 8645 Jona, Switzerland > www.pohltec.ch/ZodiacXL > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=115075#115075 > > > ________________________________ Message 11 ____________________________________ Time: 03:09:35 PM PST US From: "robert stone" Subject: Re: Zenith-List: Rotax912ULS/ZodiacXL - selection of propeller??? Hay Martin, Do you have an English version of your web site. Maybe I should say an American version since we all here in the US speak American which is based on English but not quite the same. Tracy Stone Harker Heights, Tx Zodiac601XL w/Jabiru 330 ----- Original Message ----- From: "Martin Pohl" Sent: Sunday, May 27, 2007 2:20 PM Subject: Zenith-List: Rotax912ULS/ZodiacXL - selection of propeller??? > > Hi folks > > I have to decide on which propeller to install in my Zodiac XL very soon. > I did a search through this forum and got some good information about > different propeller installations. > > Nevertheless I am specifically interested in Rotax 912ULS-powered planes > (which prop do you use, what performance do you get). I still don't know > whether I go for a fixed pitch or a constant speed prop. > > Looking forward to getting some advice!!! > > Cheers Martin > CH601XL "HB-YNA" > > -------- > Martin Pohl > Zodiac XL QBK > 8645 Jona, Switzerland > www.pohltec.ch/ZodiacXL > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=115075#115075 > > > ________________________________ Message 12 ____________________________________ Time: 07:44:33 PM PST US Subject: Zenith-List: Re: N5SL Video Update From: "Ron Lendon" Scott, Thanks for all the inspiration through your perspiration. Many happy Landings, -------- Ron Lendon, Clinton Township, MI Corvair Zodiac XL, ScrapBuilder ;-) http://www.mykitlog.com/rlendon Read this topic online here: http://forums.matronics.com/viewtopic.php?p=115127#115127 ________________________________ Message 13 ____________________________________ Time: 10:23:17 PM PST US Subject: Zenith-List: Re: Need Handheld Radio Installation From: "jetboy" Handhelds are usually difficult due to the controls & display being on 2 or more faces. In the past I've panel mounted a Delcom 760 by making a 3" plate that the radio fits into behind the radio's faceplate, fastened from behind in a custom al. sheet box and with no battery pack. Thats OK for 3" instrument holes, for smaller its probably best to get another Xcom, Microair or Becker. Ralph -------- Ralph - CH701 / 2200a Read this topic online here: http://forums.matronics.com/viewtopic.php?p=115148#115148 ________________________________ Message 14 ____________________________________ Time: 10:41:33 PM PST US From: Flydog1966@aol.com Subject: Re: Zenith-List: Crash ************************************** See what's free at http://www.aol.com. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message zenith-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Zenith-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/zenith-list Browse Digests http://www.matronics.com/digest/zenith-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.