Brodhead Pietenpol Association

Original Posted By: fishin
Subject: Re: Pietenpol-List: Varnishing Question>>I understand polyuerathane varnish won't allow the>fabric to stick, but would epoxy varnish work?>>> Most everybody uses dacron>> today and there is>> nothing wrong with that, but use the proper glue to>> attach the fabric.>> Dacron does not stick well to dope, especially>> butyrate dope.>>>=====>"A human being should be able to change a diaper, plan an>invasion, butcher a hog, conn a ship, design a building, write a sonnet,balance accounts, build a wall, set a bone, comfort the dying, take orders,give orders, cooperate, act alone, solve equations, analyze a new problem,pitch manure, program a computer, cook a tasty meal, fight efficiently, diegallantly. Specialization is for insects." -Robert Heinlein>>"I love California. I practically grew up in Phoenix." -Dan Quayle>>________________________________________________________________________________Date: Sun, 12 Mar 2000 16:42:27 -0600

Original Posted By: "Michael Conkling"
Subject: Re: Pietenpol-List: Varnishing Question According to Sport Aviation, Steve Whitman's plane fell apart because heidn't bond the dacron fabric to the frame properly and the fabric on anaileron came unglued causing flutter and enventual disintergration. Dueto the high performance of that particular airplane, this is a highlyplausible conclusion. Most everybody uses dacron today and there isnothing wrong with that, but use the proper glue to attach the fabric. Dacron does not stick well to dope, especially butyrate dope. The type of varnish to use shouldn't really matter, but some of it willbubble up when wet dope or some lues are applied to it causing a poorbond. Randolph makes a dope proof varnish, but this expensive. A goodquality spar varnish or polyuretahne varnish should be alright. Thereare some products available that can be used to paint over varnish to"dope-proof" it if it becomes necessary. In any case, if your wood isvarnished and it bubbles up when the glue or dope is applied, stop andtake some corrective action. Also, the Piet is not anywhere as highperformance as Whitman's airplane and the fabric blowing off isn't goingto be anywhere near as critical, but we still don't want it to happen.John LangstonPipe Creek, TXnle97(at)juno.com________________________________________________________________________________

Original Posted By: nle97(at)juno.com
Subject: Re: Pietenpol-List: spray spar varnish?Del, I've never used this equipment, but I know a guy who did years ago. Hesprayed the aluminum dope on and it looked great until he took it outsideto look at the inside and see if there was appropriate coverage in thersunlight. He was shocked to see that the sun just came on through likethere was no silver dope coverage. He finally figured out that thealuminum in the dope was in flakes and the high pressure cvaused theflakes to stand on end not allowing them to do there job and lay flat toblock out the rays from the sun. So he had to respray the aluminum dopewith a regular gun. The rest of it worked OK with the high spray gun.John LangstonPipe Creek, TXnle97(at)juno.com________________________________________________________________________________

Original Posted By: nle97(at)juno.com
Subject: Pietenpol-List: 2000 Broadhead Pietenpol Fly-inHey Listers............I have not seen any mention from the discussion group regarding this year's Pietenpol Fly-in at Broadhead and, with the demise of the Piet Newsletter haven't a clue if there will even be one. Sure would appreciate something on this with dates and any other info. you might have !! Don Hicks________________________________________________________________________________

Original Posted By: del magsam
Filed away somewhere(!) -- I saw a setup that used a pump type oiler, somesmall diametertubing and a cheap paint brush to make a "finish applier" -- a hole wasdrilled thru the brush so the oiler could pump the "varnish" thru the tubing& into the brush -- NO DIPPING!!!!Mike C.PP, KS----- Original Message -----

Original Posted By: David Swagler

Original Posted By: David Swagler
I had no problem with the polyurathane reacting to the glue. I usedMinwax brand, if it made a difference.My understanding of the crash of Whitman's plane was caused by him applyingthe dacron, like he used to apply cotton. The problem in the application,not the glue type.As per the Poly Fiber book,,,no glue actually " sticks" to dacron,like itdoes to cotton. You have to be sure to "bed" the dacron into the glue.Then when the glue is added on top of the joint, the "fingers" of glue thatgo between the fibers, join with the fingers comming up from the bottom thruthe dacron and join in a grip.If you just "glue" the dacron to the wood, like it seems Whitman did, thejoint will pull apart.The good thing about PolyFiber is that the glue and all of the layers andtop layers, are the same. Each one melts into the last. So if you cover theplane using proper procedures, such as correct overlaps and tape widths,there is no way that the covering can pull apart.walt-----------------------------------------------------Click here for Free Video!!http://www.gohip.com/freevideo/-----Original Message-----

Original Posted By: jack phillips

Original Posted By: shad bell
Subject: Re: Pietenpol-List: 2000 Broadhead Pietenpol Fly-inIn a message dated 03/12/2000 4:43:13 PM Central Standard Time, fishin(at)wwa.com writes:>Sorry...didn't mean to imply the Newsletter controls the fly-in...simply that it had been my only source of advanced information regarding it. No newsletter...no information. I too would like to go to Broadhead...just didn't know if or when it will be held. Still hoping someone can give that info. Thanks for the reply. Don Hicks________________________________________________________________________________Date: Mon, 13 Mar 2000 05:34:21 -0800 (PST)

Original Posted By: Ken Beanlands

Original Posted By: Ken Beanlands