---------------------------------------------------------- Pietenpol-List Digest Archive --- Total Messages Posted Sat 07/05/03: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:46 AM - Re: large lift struts (Sam Marinucci) 2. 07:24 AM - Re: large lift struts (DJ Vegh) 3. 02:02 PM - Re: large lift struts (Arthur Johnson) 4. 06:01 PM - Engine Choice ? (Michael Green) 5. 07:23 PM - Re: Oshkosh (Christian Bobka) 6. 07:24 PM - Re: let's get started; odds & ends (Christian Bobka) 7. 09:27 PM - Re: Oshkosh (Rcaprd@aol.com) ________________________________ Message 1 _____________________________________ Time: 06:46:03 AM PST US From: "Sam Marinucci" Subject: Re: Pietenpol-List: large lift struts --> Pietenpol-List message posted by: "Sam Marinucci" I would also be concerned about dissimilar corrosion between the steel and aluminum. It would be very difficult to inspect that area without removing the lift struts and taking the steel bar out to check for corrosion. Sam NX115SM >DJ, >I think I'd be concerned about the difference in thermal expansion, between >steel and aluminum. They expand and contract at very different rates. > >Chuck > > ________________________________ Message 2 _____________________________________ Time: 07:24:28 AM PST US From: "DJ Vegh" Subject: Re: Pietenpol-List: large lift struts --> Pietenpol-List message posted by: "DJ Vegh" I would have the steel bars cadmium plated like AN bolts. and then I would paint them with Zinc Chromate primer. That should take care of the corrosion issue. As for thermal expansion.... I'm not sure it would really be a big enough problem to worry about..... but it is a good point something to look into DJ Vegh N74DV Mesa, AZ www.imagedv.com/aircamper - ----- Original Message ----- From: "Sam Marinucci" Subject: Re: Pietenpol-List: large lift struts > --> Pietenpol-List message posted by: "Sam Marinucci" > > > I would also be concerned about dissimilar corrosion between the steel > and aluminum. It would be very difficult to inspect that area without > removing the lift struts and taking the steel bar out to check for > corrosion. > Sam > NX115SM > > > >DJ, > >I think I'd be concerned about the difference in thermal expansion, between > >steel and aluminum. They expand and contract at very different rates. > > > >Chuck > > > > > > ________________________________ Message 3 _____________________________________ Time: 02:02:31 PM PST US From: Arthur Johnson Subject: RE: Pietenpol-List: large lift struts --> Pietenpol-List message posted by: Arthur Johnson DJ, There is product called Duralac which you should be able to buy at any West Marine store. It is a barium chromate cream widely used in aerospace and marine industries to prevent corrosion between dissimilar metals. After your plating and painting you simply cover the contact surfaces with this cream, join, clean up and forget it. Cheers, Arthur Johnson -----Original Message----- From: owner-pietenpol-list-server@matronics.com [mailto:owner-pietenpol-list-server@matronics.com]On Behalf Of DJ Vegh Subject: Re: Pietenpol-List: large lift struts --> Pietenpol-List message posted by: "DJ Vegh" I would have the steel bars cadmium plated like AN bolts. and then I would paint them with Zinc Chromate primer. That should take care of the corrosion issue. As for thermal expansion.... I'm not sure it would really be a big enough problem to worry about..... but it is a good point something to look into DJ Vegh N74DV Mesa, AZ www.imagedv.com/aircamper - ----- Original Message ----- From: "Sam Marinucci" Subject: Re: Pietenpol-List: large lift struts > --> Pietenpol-List message posted by: "Sam Marinucci" > > > I would also be concerned about dissimilar corrosion between the steel > and aluminum. It would be very difficult to inspect that area without > removing the lift struts and taking the steel bar out to check for > corrosion. > Sam > NX115SM > > > >DJ, > >I think I'd be concerned about the difference in thermal expansion, between > >steel and aluminum. They expand and contract at very different rates. > > > >Chuck > > > > > > ________________________________ Message 4 _____________________________________ Time: 06:01:17 PM PST US From: "Michael Green" Subject: Pietenpol-List: Engine Choice ? --> Pietenpol-List message posted by: "Michael Green" Hi everyone, I'm new to the group and are about to start building once I recieve my wood. Prior to setteling on either the long or the short fuselage, obviously I have to decide on which engine to use. Could some of you please provide me with the for and against arguments for the Model A and the Corvair . Many thanks, Mike Green Romsey, Victoria Australia ________________________________ Message 5 _____________________________________ Time: 07:23:32 PM PST US From: "Christian Bobka" Subject: Re: Pietenpol-List: Oshkosh --> Pietenpol-List message posted by: "Christian Bobka" Bobka will be to brodhead for friday saturday (in a Cessna 140) and then OSHKOSH for tues wed but driving and camping. ----- Original Message ----- From: Jim Markle Subject: Re: Pietenpol-List: Oshkosh > --> Pietenpol-List message posted by: "Jim Markle" > > Brodhead Thursday-Sunday am.....Oshkosh Sunday afternoon-Saturday am....... > > I'm also taking a digital still camera (and video)....but this year I think > I'll focus on a part of the plane....then move the camera a little to some > other part close to where I WAS going to take the picture.....I'm sick and > tired of looking at pictures and wishing I had gotten a shot of "that area > RIGHT NEXT to where I took the picture"..... > > If you know what I mean...... > > Jim in Plano > NX25JM > > Making great progress on my Air Camper project!!!!! I'm just 3 or 4 hours > away from completing 2 knotty pine night stands for my wife.... > > > ----- Original Message ----- > From: "Ken Rickards" > To: > Subject: Pietenpol-List: Oshkosh > > > > --> Pietenpol-List message posted by: Ken Rickards > > > > > > Just a quick question! Who on the list will be going to Oshkosh this > year, > > flying or driving. I'm going armed with my digital camera, ready to get > as > > many ideas as I can, from the more experienced builders and flyers. I > would > > love to meet with anyone that's going! > > > > > > Ken > > > > GN1 2992 > > > > Canada > > > > > > ________________________________ Message 6 _____________________________________ Time: 07:24:58 PM PST US From: "Christian Bobka" Subject: Re: Pietenpol-List: let's get started; odds & ends --> Pietenpol-List message posted by: "Christian Bobka" Alan James, What does PFA documentation say about brazing 4130? chris bobka ----- Original Message ----- From: Alan James Subject: Re: Pietenpol-List: let's get started; odds & ends > --> Pietenpol-List message posted by: "Alan James" > > I know of no-one over here in the UK who admits to having carried out a > stress analysis of the wooden Piet. The only chap who may have come close is > Jim Wills who designed some built up spars some years ago that now form part > of the UK plans. Unfortunately, Jim is unwilling to share details of his > spars outside the UK (and presumably any other associated information) in > fear of litigation should anything go wrong. > > We also have a metal tube fuselage option approved for use and built by Paul > Prince of Aviation Metalcraft, but it bears little resemblance to the way > Bernard designed his. > > PS - I'll coming over to Brodhead to claim that nice cup of tea. Should be > arriving sometime Friday evening. Don't forget to put the kettle on... > > Alan James (G-BUCO) > The UK Pietenpol Club > > > --- Original Message ----- > From: "hjarrett" > To: > Subject: Re: Pietenpol-List: let's get started; odds & ends > > > > --> Pietenpol-List message posted by: "hjarrett" > > > > Are there any members of the Pietenpol family or British Piet guys on the > > list that can help? I know the analysis "could" be done again, but to do > it > > right you need the loads analysis first and I haven't got that either > (plus, > > even 30 years ago when I got my degree they weren't teaching ANYTHING > about > > analysis of wood fuselages. I'm using my fathers aero books from the late > > 30s and 40s along with some ancient NACA reports to learn the "old way"). > > Hank Jarrett > > > > > > 7. Hank asks- > > >Does anyone have a copy of a stress analysis that has been done > > >on the wood or steel tube Pietenpol? > > > > There was an analysis done on the steel tube, standard Piet fuselage, > > commissioned by Mr. Pietenpol. But as far as having a copy of the > analysis, > > unless it's in Don Pietenpol's personal family effects from Mr. Pietenpol, > I > > wouldn't think it would be around anymore. If you find it, by all means > > donate it to the EAA Museum! Regarding the analysis done by the British > > Piet guys, that may very well be available today but would likely take a > bit > > of scrounging and may require conversion from pounds sterling to American > > greenbacks... or Whitworth to SAE ;o) > > > > Happy 4th of July, especially to our British friends! PS- you're welcome > to > > a nice cup of tea with us anytime, and we won't even make it with water > from > > Boston harbor! > > > > Oscar Zuniga > > San Antonio, TX > > mailto: taildrags@hotmail.com > > website at http://www.flysquirrel.net > > > > > > ________________________________ Message 7 _____________________________________ Time: 09:27:59 PM PST US From: Rcaprd@aol.com Subject: Re: Pietenpol-List: Oshkosh --> Pietenpol-List message posted by: Rcaprd@aol.com In a message dated 7/4/03 8:46:51 AM Central Daylight Time, krickards@cvci.com writes: << Who on the list will be going to Oshkosh this year, flying or driving. >> I'll be there !! Chuck Gantzer NX770CG