---------------------------------------------------------- Pietenpol-List Digest Archive --- Total Messages Posted Thu 05/11/17: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:42 PM - Re: Ragwing Ultra-Piet (cdlwingnut) 2. 02:27 PM - Heim bearings for landing gear struts. (Steven Dortch) 3. 09:02 PM - Re: Heim bearings for landing gear struts. (taildrags) ________________________________ Message 1 _____________________________________ Time: 12:42:45 PM PST US Subject: Pietenpol-List: Re: Ragwing Ultra-Piet From: "cdlwingnut" A picture of my ribs and fuselage side Read this topic online here: http://forums.matronics.com/viewtopic.php?p=469225#469225 Attachments: http://forums.matronics.com//files/20170503_175635_resized_549.jpg ________________________________ Message 2 _____________________________________ Time: 02:27:39 PM PST US From: Steven Dortch Subject: Pietenpol-List: Heim bearings for landing gear struts. I have ordered material for my die spring struts. However, Terry hands pictures show heim bearings. Others don't. My current bungee system just has holes drilled in the tube. Opinions? ________________________________ Message 3 _____________________________________ Time: 09:02:04 PM PST US Subject: Pietenpol-List: Re: Heim bearings for landing gear struts. From: "taildrags" Steve; if you'll read William's description of how he built the gear on (I believe it was) Terry's airplane, the ball end fittings were used to allow for perfect alignment and orientation of the landing gear geometry. If you were building a jig to produce numbers of this landing gear all the same, you would work out the exact weldment shapes and tubing lengths using the ball joints and once it was all dialed in, you would then jig it all up for production and eliminate the adjustability (and save a little weight in the process). Building a one-off, the ball end fittings give you a means of adjusting the geometry in almost all three axes to get it spot-on without having to rework joints and fiddle with it endlessly. I'll have to go back and re-read the narrative, but I think that's what William was describing in the build-up using the ball end fittings. If your welder does a careful job with jigging, welding, and measuring as he/she fabricates, you'll end up pretty good without the ball end fittings. If not, your airplane may not track straight or it might wear one tire faster than the other, or exhibit other slightly funny things. I could just say that Mr. Pietenpol never used ball end fittings on his landing gear, but then again I also reserve the right to get smarter and learn nifty tricks that other builders have developed in the years since 1929! -------- Oscar Zuniga Medford, OR Air Camper NX41CC "Scout" A75 power, 72x36 Culver prop Read this topic online here: http://forums.matronics.com/viewtopic.php?p=469232#469232 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message pietenpol-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Pietenpol-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/pietenpol-list Browse Digests http://www.matronics.com/digest/pietenpol-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.