Brodhead Pietenpol Association

Original Posted By: "Clif Dawson"
It's all gotta be aircraft grade, so 4130 and spruce.--------Kevin "Axel" PurteeNX899KPAustin/Georgetown, TXRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: "kevinpurtee"
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________________________________________________________________________________Subject: Pietenpol-List: Re: How about this idea?

Original Posted By: Kimball Isaac
You mean like these two? The first flew for manyyears didn't it? There was an article way back thenon the construction of these struts. Wood is justas much an engineering material as steel, aluminum,carbon fiber or anything else. You just have towork within it's strengths. Which means you haveto know them. In this case it's "shear parallel to thegrain" in the chart I've sent. Bolts in wood tend topull a plug the width of the bolt out. This meansyou have two surfaces to calculate for. This meansthat if you have a bolt 1" from the end of a boardand it's 1" thick you have 1X1+1X1 surface area.In Sitka that means it will take 2,240 lb to pullthat bolt out, West. Hem.=2,340 lb and DG fir,only 2,280.If you're going to be doing your own thing with woodthen please cut+paste this chart and use it.It always seems incredible to me that we trust ourselvesto wood spars without a thought but can't get headsaround anything else made of it. :-)ClifIT COULDN'T BE DONE, BY EDGAR A. GUESTSOMEBODY SAID THAT IT COULDN'T BE DONE,BUT HE WITH A CHUCKLE REPLIEDTHAT "MAYBE IT COULDN'T," BUT HE WOULD BE ONEWHO WOULDN'T SAY SO TILL HE'D TRIED.SO HE BUCKLED RIGHT IN WITH A TRACE OF A GRIN,AND IF HE WORRIED, HE CERTAINLY HID IT.HE STARTED TO SING AS HE TACKLED THE THINGTHAT COULDN'T BE DONE, AND HE DID IT.SOMEBODY SCOFFED: "OH, YOU'LL NEVER DO THAT;AT LEAST NO ONE EVER HAS DONE IT";BUT HE TOOK OFF HIS COAT AND HE TOOK OFF HIS HAT,AND THE FIRST THING HE KNEW HE'D BEGUN IT.WITH A LIFT OF HIS CHIN AND A BIT OF A GRIN,WITHOUT ANY DOUBTING OR QUIT IT,HE STARTED TO SING AS HE TACKLED THE THINGTHAT COULD'T BE DONE AND HE DID IT.THERE ARE THOUSANDS TO TELL YOU IT CANNOT BE DONE,THERE ARE THOUSANDS TO PROPHESY FAILURE;THERE ARE THOUSANDS TO POINT OUT TO YOU ONE BY ONETHE DANGERS THAT WAIT TO ASSAIL YOU.BUT JUST BUCKLE IN WITH A BIT OF A GRIN,JUST TAKE OFF YOUR COAT AND GO TO IT;JUST START TO SING AS YOU TACKLE THE THINGTHAT "CANNOT BE DONE," AND YOU'LL DO IT.> > Is it not possible to just copy what has been successfully used already?> > Gary Boothe________________________________________________________________________________Date: Wed, 12 Jan 2011 21:29:42 -0800

Original Posted By: "Jack"
I just found the March 1970 Sport Flying mag with thearticle on this plane. It's Clyde Buckley's. It appearsthat the tip bows have been left off leaving a flat tip.There's no plate there. I've never liked those things.I think they're supremely ugly and I notice nobodyis using them. There are other things that are, likedrooped tips and winglets. It makes me wonder why.Even flat tips like these look, to me anyway, kind ofsawed off, unfinished.Oh, by the way, has anyone ever heard of "cellulosereinforced lignin composite"?Clif> > Hey Clif> I know its late and I'm rubbing my eyes but are those horner wingtips on > N3513 if so do they really make a difference?> Kim________________________________________________________________________________

Original Posted By: "Mild Bill"
It probably could be, Earl. I think someone here on this list has actually donethat but I can't remember who. I've been thinking about doing the same thingwhen I get to the point of building my fuselage (which at the rate I'm goingis YEARS down the road).--------Billy McCaskillUrbana, ILtail section almost done, starting on ribs soonRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: How about this idea?

Original Posted By: "Mild Bill"
OK. Thanks.Sometimes it's hard to tell. At a forum on ornithopters I attended at Oskhosh someyears ago, the presenter extolled the astounding performance of living birds,claiming at one point that some birds could maintain level flight indefinitely,in perfectly still air, without flapping their wings. I approached him afterthe forum and asked him how these birds could attain an infinite glide ratio,seemingly against the laws of aerodynamics.He responded, "Feathers." When I asked how feathers could do this, he clarifiedwith great exuberance but also in perfect seriousness, "Negative drag!"I smiled courteously and walked off.--------Bill FrankRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: How about this idea?

Original Posted By: "womenfly2"
Pilot78 ... see my Web Site.Cheers.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: How about this idea?

Original Posted By: "Brett Phillips"
Aluminum tube with riveted gusset plates ...... ?Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Re: Pietenpol-List: Re: How about this idea?Date: Sat, 22 Jan 2011 08:53:32 -0500