Brodhead Pietenpol Association

Original Posted By: clif
Does anyone know of a source for 4130 steel in the Minneapolis area?Dick________________________________________________________________________________Date: Thu, 07 Mar 2002 23:27:40 -0800

Original Posted By: Bret & Robin Chilcott
>>I clearly can't improve on Jack's post but one thing that made them easier>to me is that they are not really curved as much as you bend a flange along>a straight line on one side only and weld the edges. Most of the curve>comes from how sharp (or not) you make the bend.>>________________________________________________________________________________Date: Fri, 08 Mar 2002 21:32:00 -0600

Original Posted By: Larry Neal

Original Posted By: "Greg Cardinal"
Thanks GregI think I found some today. Jorgenson Steel is sending me a list of theirstock. They also have a location in Chicago.I'll post further if it works out.Dick----- Original Message -----

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Gary,The Boredom Fighter's designer, Don wolf, was a Long Island guy that workedas an engineer for either Republic or Grummans or most likely (for all thedefense industry engineers chasing contracts...like my dad) both concerns atone time or another. He was from my home town. The pictures you see of hisairplane in various pubs from the BFs heyday are taken at Brookhaven Airporton Mastic, LI.chris Bobka-----Original Message-----

Original Posted By: "Cuy, Michael D. (GRC-RXD0)[ASRC Aerospace Corporation]"
Group,In purchasing a sheet of 4130 for my fittings it is offered in"Annealed" or "Normalized" state, which is preferred? Also what size ofsheet do most builders get that can get the number of fitting I need onit? Thanks.BrianBrian JardineL-3 Communications Operations Project Engineer 640 North 2200 West P.O.Box 16850 Salt Lake City, UT 84116 L801-594-3482brian.e.jardine@L-3com.com________________________________________________________________________________

Original Posted By: "gcardinal"
Subject: RE: Pietenpol-List: 4130Brian,All of the 4130 I used was normalized, 4130 N. You'll have to figure how many fittings you can get out of what sized sheet but the twomain thicknesses used in the airplane are .060 and .090. If you have a metal fab shop in your area they might have a shear where theycan cut you strips of what widths you need as most fittings are like widths for various 'areas' on the plane. You can order 4130 in widthsfrom ACS I believe. I copied my plans where it showed full size fittings or drew them out on paper then Uhu-glue sticked them right on tomy 4130 and drilled and cut/ground to the lines/circles.Don't forget to observe the 4130 grain direction, bending rules, and edge finishing tips that Tony Bingelis has in his books such as thegrain of the steel runs with the white lettering on the sheet, your fittings should run that way length-wise too. Bends are perpendicular tothe grain. Edges should have no saw marks, nicks, or file marks. Countersink your drill holes to remove the burr/edge roughness.Mike C.________________________________________________________________________________

Original Posted By: brian.e.jardine@l-3com.com
4130Use the "Normalized" 4130. The "annealed" condition steel is soft and is to be used when heat treating is planned after the steel has been formed.Greg C. ----- Original Message -----

Original Posted By: Michael Perez

Original Posted By: Tim Verthein

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Normalized. As for sheet size, it depends on what you are using to cut themout. Bandsaw throat depths vary. Many can be cut from strip stock of theappropriate width and thickness. I don't think there is a good way tominimize wast, because, if you are like me, you'll make at least 3 to get 2good ones.Jack PhillipsNX899JP _____

Original Posted By: Andrew M Eldredge
Howdy, low 'n' slow fliers; There are various regulatory references to aircraft with and without electrical systems. Does anyone know if the regs define what constitutes an electrical system? I may have asked this question in the past but my memory isn't what I think it used to be (but I don't remember that, either). If a battery is used to power radios or anything else but there is no alternator or generator fitted to the aircraft engine to power the bus or recharge the battery, does that constitute an electrical system? Thanks. Oscar Zuniga Air Camper NX41CC San Antonio, TX mailto: taildrags(at)hotmail.com website at http://www.flysquirrel.net http://www.matr &n - &nbs --> http://www.matronics.com/co================ http://www.matronics.com/Navigator?Piet ... ntribution http://www.matronics.com/Navigator?Piet ... ______Date: Thu, 19 Mar 2009 15:07:31 -0700Subject: Re: Pietenpol-List: 4130

Original Posted By: Jim Ash