Brodhead Pietenpol Association

Original Posted By: H RULE
Hi AllI have finally started building again I have the fuse layed out on the bench.My question,at the front the bottom longeron seems to have a lot of stress fromthe firewall to the first brace the firewall brace measurement from the top longerronto the bottom is 21 7/8 and at the first brace it is 22 3/4 which is7/8 over 12 inches.My worry is will it pop when I pull it out of the jig, has anyone had this problemor done it differently OR am I worrying for no reason.I hope I have explained this clearly.ThanksCarsonRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sun, 2 Nov 2008 04:24:14 -0800 (PST)

Original Posted By: "Ed G."
Hi Carson The longeron is on a downward slope at that point so all of the bend is not right at the first upright. It continues downward to 23 3/4 and then starts back up in a tight but gentle curve. To answer your question I had no problem with my spruce longerons making that bend and I've never heard of it being a problem except on the early F/W 1929 model where that curve is tighter. I blocked it up tight in the jig at the firewall and pulled it up into the jig blocks dry. I guess you could soak it or steam it but I don't belive it's needed as long as your wood is within specs. I glued all of the joints and installed the blocking and gussets on the one side and the 1/8" plywood on the other and then let each cure for a couple days before removing each side from the jig. I belive I have seen pictures where builders have just glued in the uprights and diagonals and removed the sides from the jig before adding the gussets but I'm not nearly that optomistic. Good luck, I believe the fuselage was one of the most rewarding parts of the project. Ed G. Almost ready to start covering.>From: "carson" >Reply-To: pietenpol-list(at)matronics.com>To: pietenpol-list(at)matronics.com>Subject: Pietenpol-List: Fuse Question>Date: Sun, 2 Nov 2008 02:53:45 -0800>>>Hi All>I have finally started building again I have the fuse layed out on the >bench.>My question,at the front the bottom longeron seems to have a lot of stress >from the firewall to the first brace the firewall brace measurement from >the top longerron to the bottom is 21 7/8 and at the first brace it is 22 >3/4 which is 7/8 over 12 inches.>My worry is will it pop when I pull it out of the jig, has anyone had this >problem or done it differently OR am I worrying for no reason.>I hope I have explained this clearly.>Thanks>Carson>>>Read this topic online here:>>http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: "Gene & Tammy"
Sorry to be jumping in here again but I just remembered something I did which worked great. I left the extra length of my longeron 1x1s extend past the firewall 4 or five inches. Useing wire and a hardware store turnbuckle I cranked in some pressure to pull the lower longeron up into place. I left this in place until after I removed the fuse side from the jig and installed the inside gusset on one side and the outside ply on the other. after that cured I trimmed the longerons to length. Might have been overkill but it eliminates the chances of that joint popping loose when removed from the jig. Ed>From: "Ed G." >Reply-To: pietenpol-list(at)matronics.com>To: pietenpol-list(at)matronics.com>Subject: RE: Pietenpol-List: Fuse Question>Date: Sun, 02 Nov 2008 07:31:00 -0500>>>Hi Carson The longeron is on a downward slope at that point so all of the >bend is not right at the first upright. It continues downward to 23 3/4 and >then starts back up in a tight but gentle curve. To answer your question I >had no problem with my spruce longerons making that bend and I've never >heard of it being a problem except on the early F/W 1929 model where that >curve is tighter. I blocked it up tight in the jig at the firewall and >pulled it up into the jig blocks dry. I guess you could soak it or steam it >but I don't belive it's needed as long as your wood is within specs. I >glued all of the joints and installed the blocking and gussets on the one >side and the 1/8" plywood on the other and then let each cure for a couple >days before removing each side from the jig. I belive I have seen pictures >where builders have just glued in the uprights and diagonals and removed >the sides from the jig before adding the gussets but I'm not nearly that >optomistic. Good luck, I believe the fuselage was one of the most rewarding >parts of the project. Ed G. Almost ready to start covering.>>>>From: "carson" >>Reply-To: pietenpol-list(at)matronics.com>>To: pietenpol-list(at)matronics.com>>Subject: Pietenpol-List: Fuse Question>>Date: Sun, 2 Nov 2008 02:53:45 -0800>>>>>>Hi All>>I have finally started building again I have the fuse layed out on the >>bench.>>My question,at the front the bottom longeron seems to have a lot of stress >>from the firewall to the first brace the firewall brace measurement from >>the top longerron to the bottom is 21 7/8 and at the first brace it is 22 >>3/4 which is 7/8 over 12 inches.>>My worry is will it pop when I pull it out of the jig, has anyone had this >>problem or done it differently OR am I worrying for no reason.>>I hope I have explained this clearly.>>Thanks>>Carson>>>>>>>>>>Read this topic online here:>>>>http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: owner-pietenpol-list-server(at)matronics.com
Carson,I saw no tendencies for the joints to fail, but I installed diagonals andgussets before removing the 1st side from the jig. Check the archives asDick Navatril had good ideas for making the rear cockpit a little larger,with more slope to the pilot's seat back.Gary BootheCool, Ca.PietenpolWW Corvair ConversionTail done, working on fuselage (endless metal parts!)(12 ribs down.)-----Original Message-----

Original Posted By: "Tom Anderson"
Thanks for the replies I have glued up the first side and it was fine,but I didput the gusset on , on the underside to be on the safe side.Again thanksCarsonRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Some thoughts on building an airplane

Original Posted By: Michael Perez
Gosh, Mr. Wynne's post is almost poetic in nature.--------Location: Wilson, NCRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Tue, 4 Nov 2008 16:51:42 -0800 (PST)