Original Posted By: "Jake Crause"
Pieters,I've finally got around to lofting the rib onto my rib jig and am prettyhappy with the profile given some of the variations in the dimensionsgiven in the drawings. I'm plotting the locations of the spars and ranacross a couple of questions.1. Are the bottoms of the spars supposed to be beveled to match the ribprofile? If so, is the starting dimension supposed to be 4 3/4 thenbeveled as needed or must the beveled dimension be no less than 4 3/4 onits shortest side after beveling?2. From the horizontal reference line the top of the front spar is at 51/8" and so is the top of the rear spar. Taking into account the 1/4cap strip the bottom of the front spar is at 5/16" above the referenceline and the bottom of the rear spar is at 1/2". This tells me that therear spar must be shorter. Is this correct or am I missing something.Thanks.Jake CrauseP.S. I am using 3/4" spars and the locations I have them plotted are:1. Front face of the front spar is 6 7/8" from LE of wing.2. Front face of rear spar is 28" from rear face of front spar. ________________________________________________________________________________
Pietenpol-List: More Rib fun
RE: Pietenpol-List: More Rib fun
Original Posted By: barnstmr(at)aol.com
Another rib question. Where did you find the locations of the verticals(only used on end ribs)? Are they just equal distance between thespars? I noticed they do not appear to be vertical. Do I just get themabout as perpendicular between the two capstrips as possible and basethe diagonals off of that? Maybe I'm over thinking it. Thanks.Jake Crause ________________________________________________________________________________Date: Mon, 08 Aug 2005 16:16:43 -0400
Another rib question. Where did you find the locations of the verticals(only used on end ribs)? Are they just equal distance between thespars? I noticed they do not appear to be vertical. Do I just get themabout as perpendicular between the two capstrips as possible and basethe diagonals off of that? Maybe I'm over thinking it. Thanks.Jake Crause ________________________________________________________________________________Date: Mon, 08 Aug 2005 16:16:43 -0400
Re: Pietenpol-List: group photo at Brodhead with Javier
Original Posted By: John Hofmann
Subject: Re: Pietenpol-List: group photo at Brodhead with Javier Sure is easy to pick out the Suthun gentlemen in this pic. Orange shirt has to be a yankee as he is too good looking to be a reb.________________________________________________________________________________Date: Mon, 08 Aug 2005 17:22:56 -0500Subject: Re: Pietenpol-List: group photo at Brodhead with Javier
Subject: Re: Pietenpol-List: group photo at Brodhead with Javier Sure is easy to pick out the Suthun gentlemen in this pic. Orange shirt has to be a yankee as he is too good looking to be a reb.________________________________________________________________________________Date: Mon, 08 Aug 2005 17:22:56 -0500Subject: Re: Pietenpol-List: group photo at Brodhead with Javier
RE: Pietenpol-List: More Rib fun
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Well, I did some more digging and came across a discussion on this topicin Sep 99. I'm glad I wasn't the only one that ran into that problem.Anyway, the 4 possible fixes that were discussed were:1. Notch the capstrip a bit to allow the spar to fit. I believe, onceglued, this would be very strong and would not affect rib strength.Walt Evans did this.2. Bevel the spar as required to get it to fit. The downside is itRemoves spar material. 3. Go with a slightly undersized spar and still use the wedges. Thedownside is slightly weaker spar but still has a flat top unlike #2.4. Notch the spar where the rib joins. I don't like this idea becauseof the stress riser imposed.I like number 1 personally. Does anyone see a problem with doing this?One point that was brought up during the Sep 99 discussion was that manydesigns don't even have a capstrip over the spar. A small notch, with aproper glue joint, should be as strong as one without a notch. Anyway, thanks for listening. Look forward to hearing from you.Jake-----Original Message-----
Well, I did some more digging and came across a discussion on this topicin Sep 99. I'm glad I wasn't the only one that ran into that problem.Anyway, the 4 possible fixes that were discussed were:1. Notch the capstrip a bit to allow the spar to fit. I believe, onceglued, this would be very strong and would not affect rib strength.Walt Evans did this.2. Bevel the spar as required to get it to fit. The downside is itRemoves spar material. 3. Go with a slightly undersized spar and still use the wedges. Thedownside is slightly weaker spar but still has a flat top unlike #2.4. Notch the spar where the rib joins. I don't like this idea becauseof the stress riser imposed.I like number 1 personally. Does anyone see a problem with doing this?One point that was brought up during the Sep 99 discussion was that manydesigns don't even have a capstrip over the spar. A small notch, with aproper glue joint, should be as strong as one without a notch. Anyway, thanks for listening. Look forward to hearing from you.Jake-----Original Message-----
RE: Pietenpol-List: More Rib fun
Original Posted By: "tmbrant1(at)netzero.com"
Subject: RE: Pietenpol-List: More Rib funI plan to use the beveled spar method, although I don't see anything wrong withany of the ways you've sugested. Hadn't thought about notching the ribs butI tend to use the easiest way I can think of which, to me is beveling the spars...The only draw back to this is slightly increased weight (over a sq. sparwith wedges) but we're talking minimal difference..My two cents...Tom B.________________________________________________________________________________
Subject: RE: Pietenpol-List: More Rib funI plan to use the beveled spar method, although I don't see anything wrong withany of the ways you've sugested. Hadn't thought about notching the ribs butI tend to use the easiest way I can think of which, to me is beveling the spars...The only draw back to this is slightly increased weight (over a sq. sparwith wedges) but we're talking minimal difference..My two cents...Tom B.________________________________________________________________________________
Re: Pietenpol-List: More Rib fun
Original Posted By: "Jake Crause"
don't notch. It will weaken the capstrip that is carrying a sizeabletensile load. Better to plane down the spar ever so little to have it at anangle that matches the angle betweent he upright and the lower cap.ChrisBraumeister und Inspektor der Flitzer und Flitzermotoren----- Original Message -----
don't notch. It will weaken the capstrip that is carrying a sizeabletensile load. Better to plane down the spar ever so little to have it at anangle that matches the angle betweent he upright and the lower cap.ChrisBraumeister und Inspektor der Flitzer und Flitzermotoren----- Original Message -----
RE: Pietenpol-List: A/N Hardware
Original Posted By: "Phillips, Jack"
Re: Pietenpol-List: A/N Hardware
Original Posted By: Michael D Cuy