Brodhead Pietenpol Association

Original Posted By: Tim Willis
nk.net>As some of you might know, I am a sculptor.- I want to propose a piece to a city, but I'm not sure how to build it, so I thought with the knowledge base, I should put it out there.I want to fabricate a vertical helix (spiral, like the DNA strand).- It would rise into the sky about twelve to fifteen feet.- I want it to be very light and very strong so I thought I could build it from aircraft tubing, cover it with dacron and paint it with latex. So far, so good.- However, I'm not sure how to get the tubing bent into that shape.I did one last year where I bent aluminum around a cylindrical from, and though it worked, it was difficult to say the least and I'm not sure we could do with steel, which I'm thinking will be 3/4 to 1".I was wondering if I could have a forging company bend the tubing into circles and then stretch or open them up?I'm sure there is a program out there that would allow a bending machine to just whip these out for me.Any ideas are much appreciated!!Douwele, List Admin.________________________________________________________________________________Date: Mon, 25 Jan 2010 12:47:40 -0600 (GMT-06:00)

Original Posted By: helspersew(at)aol.com

Original Posted By: Michael Perez

Original Posted By: "K5YAC"
Tim; about all I can offer is what I've seenon John Dilatush's Piet, here:http://www.flysquirrel.net/piets/P6210010.JPGLooks to me like he used AN393 clevis pinswith washer and cotter on the far side. Not sureif he used tubing spacers or anything elsebetween the two links. Perhaps there aresome better pix out there??Oscar ZunigaAir Camper NX41CCSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net ________________________________________________________________________________Subject: Pietenpol-List: Re: motorcycle links

Original Posted By: Thomas Bernie
Those are long links in John's photo. Perhaps he made those by hand? I have some#80 links that I like the pitch on (1"), but they are big (the pins are ahair under 5"16), so I'll probably try to make the #50 work. #50 is perfect for3/16" pins, but the pitch (pin center to center) is only 5/8". when you subtract3/16" (3/32" from the center of each pin), you only end up with 7/16" clearancebetween the pins. Pretty tight for control horns, but so far that seemsto be enough for the areas I am currently attempting to use them.It is your choice if you use a washer or not. You can calculate for one or more,or eliminate the need by using the proper length clevis pin or bolt. For stationaryitems, I really don't see the need for washers. Perhaps they minimizebinding on moving items? I kind of doubt that is much of a problem. Good info in this link http://forums.matronics.com/viewtopic.p ... ------Mark - working on wingsRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: Rick Holland
Subject: Pietenpol-List: good NOAA METAR interactive weather mapThis is pretty useful stuff !http://www.wrh.noaa.gov/zoa/mwmap3.php? ... ______Date: Mon, 25 Jan 2010 15:26:57 -0500Subject: Re: Pietenpol-List: firewall tip