Brodhead Pietenpol Association

Original Posted By: Greg Bacon
Subject: Pietenpol-List: Covering the Pietenpol Wing Bottom

Original Posted By: "Jack Phillips"
Just stitch it. It is a non issue. On Sep 19, 2012, at 1:05 PM, Greg Bacon wrote:> Just something I though worthy of sharing with the group and to open up the topic for comments from veteran builders-> > I've heard comments about the challenge (anxiety) of covering a concave shaped wing bottom. I just got off the phone with Dan Stewart of Stewart Systems. I asked Dan for advice on the best way to handle the under camber covering. First though, I measured the farthest distance the fabrik would pull away by running a string from the leading edge to the trailing edge on the wing bottom. The greatest distance was 9/16 inch. Dan said this distance was not great and many builders simply pull it in during the rib stitching process, well after the final shrink. He said you can also follow this sequence; lightly glue fabrik to the bottom capstrips by precoating them with EkoBond then tack with heat after the perimeter is glued down, lightly iron (about 200F) just to get out the wrinkles, rib stitch, then shrink at 250 then 315. This is almost exactly as described in the PolyFiber manual.> > Thoughts or better ideas?> > Thanks!> > -- > Greg Bacon> > > > ============================================================================================================================================> ________________________________________________________________________________

Original Posted By: owner-pietenpol-list-server(at)matronics.com
I did it per the second technique you listed, but I think just stitching itwould be fine.Jack PhillipsNX899JPSmith Mountain Lake, Virginia _____

Original Posted By: Greg Bacon
Glue it, then stitch.Dan HelsperPuryear, TN-----Original Message-----

Original Posted By: Rick Schreiber

Original Posted By: Rick Schreiber

Original Posted By: Greg Bacon
One of the Piet list said that he covered both top and bottom gluing just around the edges. He then heat shrunk the fabric at 200 degrees. Then he rib-stiched the entire wing, pulling that 9/16-inch in with the stitching. Then he heat shrunk at 300 degrees. Fini----- Original Message -----

Original Posted By: "Rick Schreiber"
Rick, I just checked my engine. The left shroud goes between the #2 cylinder and the oil cooler (I also have the 12-plate cooler). You must have one. The shroud forces the air down through the fins on the #2 cylinder. A shroud should also be built with the opening at least as large as the area of the top of the oil cooler to force cooling air from the top of the engine down through the cooler. Clear as mud? C----- Original Message -----

Original Posted By: Greg Bacon
Subject: Re: Pietenpol-List: Covering the Pietenpol Wing Bottom

Original Posted By: Michael Perez
I have only worked on 8-10 Strombergs and maybe looked at that many more while paying attention=2C but every one of them had safety-wired fillister head screws holding the two carb halves together. You're less likely to over-tighten the fasteners and over-compress the gasket with screws as you are with bolts that you can put a wrench on=2C but that's not a big problem if you recognize that the gasket is doing the important work=2C not the fasteners.Michael is an A&P=2C so he understands the concept.Oscar ZunigaAir Camper NX41CC "Scout"Medford=2C OR ________________________________________________________________________________Date: Thu, 20 Sep 2012 06:17:09 -0700 (PDT)

Original Posted By: Michael Perez