Brodhead Pietenpol Association

Original Posted By: Clif Dawson
Subject: Re: Pietenpol-List: Piet strutsTwo Piets on my field are flying with al. struts. Mine since 95 and the other for about 7 years. Jim________________________________________________________________________________Date: Sun, 15 Oct 2006 22:48:43 -0700

Original Posted By: "Phillips, Jack"

Original Posted By: owner-pietenpol-list-server(at)matronics.com
I guess the thing is that all those applications were specifically designedfor the loads in their application. I remember an evaluation of the metalstruts that someone did (on this list?) demonstrating an extremely lowmargin of safety in negative G ( 1.05 or so). This analysis was in supportof jury struts, the main struts were crippling, at least on paper. Do wehave a mechanical engineer on the list who could develop an analysis tocompare the struts?Bob -----Original Message-----

Original Posted By: Hans Vander Voort
Rick,I have setup my Matco tailwheel (with compression type connector springs)with a little slack when not loaded.Basically you want the wheel to swivel easily, when not loaded.When the rear seat is occupied the leaf spring bending removes the slackand there is tension on the springs and the wheel is controllable by therudderI did not use any turn buckles.Hans "Rick Holland" To Sent by: pietenpol-list(at)matronics.com owner-pietenpol-l cc ist-server@matron ics.com Subject Pietenpol-List: Tailwheel cables 10/16/2006 09:08 AM Please respond to pietenpol-list@ma tronics.com Question about hooking up the control cables to my Matco tailwheel (withcompression type connector springs). Do you setup the cables to apply abit of constant tension on the springs? I am assuming no turnbuckle is usedon these cables also.ThanksRick--Rick Holland"Logic is a wreath of pretty flowers, that smell bad"________________________________________________________________________________Subject: RE: Pietenpol-List: Piet struts

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Bob,I did evaluate the Skytec struts on strength and even bought a set, butnever flew with them.The tensile strength data available from both the supplier and othersources where so in consistent that I did not feel comfortable with them.The struts are one of the most important load bearing items on the airplaneand is easily an area where you be penny wise and a pound...In the end I used the expensive steel streamlined steel tubing.Both the aluminum and the steel streamline tubing should have jury struts,neither one are rigid enough.When placing the jury struts do not place them in the center of the mainstrut, set them 4-6 inches off-center, this to avoid harmonic vibrationHans "Robert Gow" To Sent by: owner-pietenpol-l cc ist-server@matron ics.com Subject RE: Pietenpol-List: Piet struts 10/16/2006 08:03 AM Please respond to pietenpol-list@ma tronics.com I guess the thing is that all those applications were specifically designedfor the loads in their application. I remember an evaluation of the metalstruts that someone did (on this list?) demonstrating an extremely lowmargin of safety in negative G ( 1.05 or so). This analysis was in supportof jury struts, the main struts were crippling, at least on paper. Do wehave a mechanical engineer on the list who could develop an analysis tocompare the struts?Bob -----Original Message-----

Original Posted By: "Rick Holland"

Original Posted By: "Rick Holland"