Brodhead Pietenpol Association

Original Posted By: Dan Yocum

Original Posted By: "womenfly2"
2" numbers are approved and can be placed under the tail if you so desire. NX doeseliminate the lettering "Experiment" on the machine.FYI,I was told that the data plate had to be Stainless Steel with stamped or etchedletters, just the information you fill-in. The explanation was that it neededto survive a fire and so it still can be read. It was also state the data platebe placed on the exterior of the plane, recommend to be mounted on the cowling,so I did.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Pietenpol airframe how many hours can it take?

Original Posted By: greg menoche
I have rebuild some UPF-7 wings and others glued with Weldwood glue. A chisel betweenthe plywood gusset plate and cap strips just popped them off clean! Onlythe brads held them in-place. This was a legal airworthy machine too!Most builders today use T-88 or similar glue which have a very longer life span.I would say that a epoxied glued machine would well out last a Weldwood gluemachine.Just my 2 cents.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Fri, 30 Apr 2010 09:05:13 -0400 (GMT-04:00)

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Be careful when you just say "Weldwood". That is a brand name, currentlyowned by DAP. The name Weldwood is appiled to their plastic resin glue,their contact cement, and their resorcinol glue.I suspect you were referring to plastic resin glue, which has been shown tobe less than desirable (if I recall correctly, that is the glue that Douwe'sribs were built with, which were found to pop off gussets at the woodworkingtent at SNF this year. Douwe did not build those ribs, but bought a projectand now has found he has much more of a project ahead).Weldwood resorcinol glue is excellent, and is in fact the ONLY glue the FAAwill accept for repairs of certificated wooden airplanes. I built most ofmy Pietenpol with resorcinol (T-88 for the remainder), and had no problemsas long as it was done within the specified paramters.Jack PhillipsNX899JPRaleigh, NC-----Original Message-----

Original Posted By: Jim

Original Posted By: Ben Charvet

Original Posted By: Dan Yocum
Yes Jack, you remembered correctly about Douwe's Piet. His ribs exhibited thesame issues as Carrie's UPF-7. A sharp knife would separate the gussets. Severalof us took a critical look at both his wing and rudder at SnF. The rudderseemed to be assembled with the same kind of glue as the ribs BUT you couldn'tpry the plywood gussets off it with a jackhammer. We tried to take them offand they exhibited the correct characteristics---the wood failed and the gluewas still there. The question unanswered was why the different behavior. Twoconjectures were reasonable -- 1) The glue was prepared/applied incorrectly(temperature, clamping pressure, mixture, etc.) and 2) the wood was prepareddifferently. This leads up to the discussion of sanding plywood as a prep forglue. Also the plywood rib gussets may have had some wax on them from the productionprocess (they were thinner stock) that wasn't removed or was of differentwood. The whole episode actually raised more questions than answers.DaveRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Fri, 30 Apr 2010 20:31:20 -0500

Original Posted By: helspersew(at)aol.com