Brodhead Pietenpol Association

Original Posted By: "skellytown flyer"
Well Oscar's flight story gives me something to look forward to in mine if I canjust finish it.I flew an hour yesterday in my clipwing Challenger while it wascool and calm.should have been ideal for a Pietenpol.noticed as I went overa big pipeline bridge how the cables seemed to have been painted green.cruisedon to the hills where Billy Dixon made his mile long shot from a buffalo hunterscamp north of the Canadian River and turned after seeing some nice Mule Deer.Allthis at maybe 200 ft. AGL. headed back south and saw about 20 Turkey buzzardssitting on those cables that support the 24" pipeline with their wingsspread out. where did those come from ? guess they were in the shadows on theway over-the thing is about a half mile long.anyway I got in a beautiful flightand came home to get a little more done on the project I got from DJ- I surewant to get it flying in the next year but have been doing a lot of travelingand will be working around Kansas most of the summer and living in motels exceptweekends so it will be difficult-not a lot of small parts to take along forbuilding in the evenings at this stage.it was nice to have ribs to glue upyears back when I was doing it.Anyway- I wonder how flying low and sightseeingwill be in the GN-1 behind the Corvair. I know the noise should be a lot moretolerable than the screaming 2 stroke,but I can cruise it at 85 to 90 an reallybank it around to stay with a running Antelope or rabbit to get a second lookwithout it dropping out from under me.i doubt the speeds will be anywhere nearas fast and i don't know if it will be as forgiving in a tight turn as myold Piper used to be.it seemed that thing would rotate in one spot with enoughrudder -something to practice at higher altitudes.but I'm just guessing the Pietwill be a little less responsive in a turn.anyway this is not worth archiving-justdaydreams.RaymondRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: engine mount angle

Original Posted By: Ameet Savant
Raymond;Let's see if I change my message formatting to "plain text" ifthe extra "alphabet" doesn't show up in my posts whenever I adda comma or other punctuation.The Corvair engine mount design that you can get from the Pietenpolfamily incorporates the offset that Mr. Pietenpol used on hisairplanes. The plans for that mount show the propeller end of themain cradle tubes 1" lower than the firewall end of the tubes butno left/right offset. I have not heard whether any of the PietVairpilots have needed to add rudder trim or other offset. Perhaps Hanswill comment on how his PietVair flies, and if he built his mountaccording to the Pietenpol drawing dated 3-15-67.I have one of these engine mounts, built per this drawing, and candig it out of the hangar and make measurements if you'd like.Oscar ZunigaAir Camper NX41CCSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net________________________________________________________________________________Date: Sun, 24 May 2009 19:02:33 -0700 (PDT)

Original Posted By: "skellytown flyer"
Subject: RE: Pietenpol-List: now much bungee cord do I need?Douwe, I use 6 feet of 1/2" diameter bungee per side. 5/8" is too much work to wrap. Beware...I've ordered 1/2" and rec'd 5/8" that they said was "close enough" from Wicks and ACS. Some guys use the 5/8" but for me tistoo stiff and doesn't give the "give" you might desire. Other's may vary on what they use but that has worked for me. PS-- don't buy flea market or dollar store bungee material/cord....was a dumb moveI'll never do again as it lasted less than 2 mos. PSS-- If you have a Boater's World store near you, you can go there and see thegreat selection of bungee cord they have and justtell them to cut you how ever much you'll need. PSSSS-- to get the right "give" I sometimes have to wrap and re-wrap my cords2-3 times to get them to be equal from side to side(roughly) and so they don't sag too much with a full load but aren't too tightwhere they don't give at all. It is kind of like making Goldie Lockshappy with the bed that is just right. Mike C.________________________________________________________________________________Subject: Pietenpol-List: Re: engine mount angle

Original Posted By: hvandervoo(at)aol.com
Raymond wrote->I was considering whether to do anything with the thrust on my mount>of course if yours is for a real Piet it would no doubt be different>in fit than a GN-1 anyway.Shouldn't be. Same basic dimensions and geometry, similar weight& balance, and certainly the same V-speeds and attitude in climb. Ifany differences, they would be minor. Some GN-1s are built usingcomplete wing and landing gear assemblies from certified aircraft, butDJ built his from scratch and used the undercamber airfoil profile sothere shouldn't be much difference between your GN-1 and an Air Camper.Now it is true that the engine mount attach points are different inthat DJ used standard spool-type mounts with bolts through the firewall,but the engine/airframe geometry should be the same. With the fuselagelevel (top longerons level), your engine mount tray should be a littlelower in front than in back. I can calculate the angle if you want,but I'll bet DJ built it with a good offset in it.>D.J. said he added some angle of attack to the wing if I remember right>so maybe that will allow it to fly more levelActually, here's what he says about the incidence on his website:"The first thing I needed to do was confirm that my angle of incidencewas going to be correct. It turns out that the GN-1 plans are not correctand give you only about .5 degrees of incidence. This is probably whymost GN-1s fly "tail low". I did the math and figured I needed to raisethe front cabane another .5". I did that by inserting a longer aluminumbar into the extruded strut. This gave me 1.5 degrees of incidence."You worry too much, Raymond ;o)Oscar ZunigaAir Camper NX41CCSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net________________________________________________________________________________Subject: Re: Pietenpol-List: engine mount angleDate: Mon, 25 May 2009 09:53:16 -0400