Brodhead Pietenpol Association

Original Posted By: "Phillips, Jack"
Michael,http://www.flickr.com/photos/rmueller23 ... izes/o/Red circle surrounds the aft portion of the end rib on the left side of the center section. To the left of that would be the end rib of the left wing panel. Blue circle surrounds the tail rib in the left side of the center section. Is that what you are talking about?RyanOn Thu, Nov 6, 2008 at 8:26 AM, Michael Perez wrote:No, that's not it. That center section view on the bottom rightof the print, on the left of the center section itself, the left wing has the end rib, then inboard of that at, I believe, 4-1/2" is another rib. I do not have the prints with me now, but that is what I remember seeing.________________________________________________________________________________Subject: RE: Pietenpol-List: Wing print and center sectionDate: Thu, 6 Nov 2008 10:26:21 -0500

Original Posted By: Michael Perez
Michael,http://www.flickr.com/photos/rmueller23 ... izes/o/Red circle surrounds the aft portion of the end rib on the left side of the center section. To the left of that would be the end rib of the left wing panel. Blue circle surrounds the tail rib in the left side of the center section. Is that what you are talking about?RyanOn Thu, Nov 6, 2008 at 8:26 AM, Michael Perez wrote:No, that's not it. That center section view on the bottom rightof the print, on the left of the center section itself, the left wing has the end rib, then inboard of that at, I believe, 4-1/2" is another rib. I do not have the prints with me now, but that is what I remember seeing.________________________________________________________________________________Date: Thu, 6 Nov 2008 07:40:05 -0800 (PST)

Original Posted By: "Ryan Mueller"
Insofar as the rib spacing goes, it appears on the one piece wing that the spacing indicated is "on center" for the ribs. If you add the spacing up from the center of the wing to the tip (excluding the 1" wing tip bow) you arrive at 14" 5', which jives with the length shown for the spar. Therefore the actual spacing between the ribs would be 1/2" less than the on center spacing shown (per 1/2" wide capstrips). Does that sound reasonable?Here's my conclusion on rib count. If you look at the "rear view - full size" print at the top of the sheet, you can see it shows 14 1/2" from the center of the nose rib to the end of the center section spar. Then there is 1/2" from end of the wing spar to the end of the wing panel butt rib. An additional 1/4" would get us to the center of the wing panel butt rib. Therefore: center of the nose rib to the center of the wing panel butt rib should equal 15 1/4".Based on what I can see on the overhead view of the center section it is 8 1/4" from the center of the wing panel butt rib to the next rib. Adding 15 1/4" to 8 1/4" arrives at 23 1/2". This is the same spacing as shown on the one piece wing from the center of the nose rib to the second rib from the center (12 1/2" + 11"). Since we have a common point of reference between the two types of wings, we can therefore count up the ribs. We should have 14 ribs in each wing panel; two wings means 28 ribs. There are 2 full size ribs in the center section, bringing the count to 30. Then you have the three partials, one nose rib and two tail ribs.Can someone check my math please? I haven't had breakfast yet, so no guarantees.... - :PRyanOn Thu, Nov 6, 2008 at 6:29 AM, Michael Perez wrote:I am confused with the way I see the original wing print and the newer 3 piece supplement print. On the original, the full left wing looks to have 14 ribs, right up until you get to the middle of the wing, where the new center section would be. These ribs are spaced about 11"-12" apart. On the new center section print, it shows part of the left wing with a rib 4-1/2" away from the end rib near the center section. My questions are:-Do you add this "new" rib between the existing ribs shown 11"-12" apart?Do you add this "new" rib on the end of the existing ribs? (making the wing longer)Do you take the original rib count and space them where needed on the new wing so that the cables and the like clear and not worry about the 11", 12" or 4-1/2" spacing?How many total ribs are used on each wing section with the 3 piece design?________________________________________________________________________________Date: Thu, 6 Nov 2008 10:04:44 -0600

Original Posted By: "Catdesigns"
Insofar as the rib spacing goes, it appears on the one piece wing that the spacing indicated is "on center" for the ribs. If you add the spacing up from the center of the wing to the tip (excluding the 1" wing tip bow) you arrive at 14" 5', which jives with the length shown for the spar. Therefore the actual spacing between the ribs would be 1/2" less than the on center spacing shown (per 1/2" wide capstrips). Does that sound reasonable?Here's my conclusion on rib count. If you look at the "rear view - full size" print at the top of the sheet, you can see it shows 14 1/2" from the center of the nose rib to the end of the center section spar. Then there is 1/2" from end of the wing spar to the end of the wing panel butt rib. An additional 1/4" would get us to the center of the wing panel butt rib. Therefore: center of the nose rib to the center of the wing panel butt rib should equal 15 1/4".Based on what I can see on the overhead view of the center section it is 8 1/4" from the center of the wing panel butt rib to the next rib. Adding 15 1/4" to 8 1/4" arrives at 23 1/2". This is the same spacing as shown on the one piece wing from the center of the nose rib to the second rib from the center (12 1/2" + 11"). Since we have a common point of reference between the two types of wings, we can therefore count up the ribs. We should have 14 ribs in each wing panel; two wings means 28 ribs. There are 2 full size ribs in the center section, bringing the count to 30. Then you have the three partials, one nose rib and two tail ribs.Can someone check my math please? I haven't had breakfast yet, so no guarantees.... - :PRyanOn Thu, Nov 6, 2008 at 6:29 AM, Michael Perez wrote:I am confused with the way I see the original wing print and the newer 3 piece supplement print. On the original, the full left wing looks to have 14 ribs, right up until you get to the middle of the wing, where the new center section would be. These ribs are spaced about 11"-12" apart. On the new center section print, it shows part of the left wing with a rib 4-1/2" away from the end rib near the center section. My questions are:-Do you add this "new" rib between the existing ribs shown 11"-12" apart?Do you add this "new" rib on the end of the existing ribs? (making the wing longer)Do you take the original rib count and space them where needed on the new wing so that the cables and the like clear and not worry about the 11", 12" or 4-1/2" spacing?How many total ribs are used on each wing section with the 3 piece design?________________________________________________________________________________Subject: Pietenpol-List: Re: Wing print and center section

Original Posted By: Ryan Mueller
>From the center of the nose rib (i.e. center of the wing) to the left end of the center section spar would be 14 1/2". Add that to the 13' 2 1/2" length of the wing spar and you have 14' 5". This is same length as the distance from the center of the nose rib to the end of the spar of the one piece wing. For the purpose of visualizing how to space the ribs, consider the circled ribs to be the same rib:http://www.flickr.com/photos/rmueller23 ... es/l/>From that rib going outboard your ribs on the three piece wing would be spaced the same as the ribs on the one piece wing. From that rib going inboard you reference the three piece wing drawing.Does that help?RyanOn Thu, Nov 6, 2008 at 9:40 AM, Michael Perez wrote:The 3 piece wing spars are shown at 13'-2.5" and you have the 29" center section. That C.S. drawing shows the rib in question as mentioned. With no rib spacing/numbers given, how many ribs per wing and how does that "new" rib fit in?--- On Thu, 11/6/08, Ryan Mueller wrote:

Original Posted By: "Catdesigns"
Oops! Sorry Ryan, I see your not the one who asked. Chris--------Chris TracySacramento, CAWestCoastPiet.comRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Wing print and center section

Original Posted By: "Ryan Mueller"

Original Posted By: Michael Perez

Original Posted By: "Ryan Mueller"

Original Posted By: "Ryan Mueller"

Original Posted By: Michael Perez

Original Posted By: Michael Perez

Original Posted By: "Catdesigns"
Ryan, take a look at the attached scan of the plans. All you do is add a new rib inthe first 11-inch rib spacing (see picture). You will need 30 ribs plus one forthe wall.Chris--------Chris TracySacramento, CAWestCoastPiet.comRead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/t_1_ ... ___Subject: Pietenpol-List: Re: Wing print and center section

Original Posted By: Michael Perez
Oops! Sorry Ryan, I see your not the one who asked. Chris--------Chris TracySacramento, CAWestCoastPiet.comRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Thu, 6 Nov 2008 08:43:31 -0800 (PST)

Original Posted By: Michael Perez
After re reading your original message let me be more specific.Q: Do you add this "new" rib between the existing ribs shown 11"-12" apart?A: See picture in my previously attached photo and you will see a new rib addedbetween the first 11-inch rib spacing out from the center of the wing.Q: Do you add this "new" rib on the end of the existing ribs? (making the winglonger)A: No.Q: Do you take the original rib count and space them where needed on the new wingso that the cables and the like clear and not worry about the 11", 12" or 4-1/2"spacing?A: No. You will want to slightly adjust the rib spacing else where to clear fittingsand wires.Q: How many total ribs are used on each wing section with the 3 piece design?A: 30Q: I wonder why that new rib at 4-1/2" is shown...I would hate to omit a neededreinforcement.A: This has 4-1/2" measurement has me confused me confused. I don't see it onthe plans. Perhaps you meant the 8-1/4" measurement on the bottom of the drawing?Chris--------Chris TracySacramento, CAWestCoastPiet.comRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Thu, 6 Nov 2008 09:10:40 -0800 (PST)

Original Posted By: Michael Perez
>> Insofar as the rib spacing goes, it appears on the one piece wing that the> spacing indicated is "on center" for the ribs. If you add the spacing up> from the center of the wing to the tip (excluding the 1" wing tip bow) you> arrive at 14" 5', which jives with the length shown for the spar. Therefore> the actual spacing between the ribs would be 1/2" less than the on center> spacing shown (per 1/2" wide capstrips). Does that sound reasonable?>> Here's my conclusion on rib count. If you look at the "rear view - full> size" print at the top of the sheet, you can see it shows 14 1/2" from the> center of the nose rib to the end of the center section spar. Then there is> 1/2" from end of the wing spar to the end of the wing panel butt rib. An> additional 1/4" would get us to the center of the wing panel butt rib.> Therefore: center of the nose rib to the center of the wing panel butt rib> should equal 15 1/4".>> Based on what I can see on the overhead view of the center section it is 8> 1/4" from the center of the wing panel butt rib to the next rib. Adding 15> 1/4" to 8 1/4" arrives at 23 1/2". This is the same spacing as shown on the> one piece wing from the center of the nose rib to the second rib from the> center (12 1/2" + 11").>> Since we have a common point of reference between the two types of wings,> we can therefore count up the ribs. We should have 14 ribs in each wing> panel; two wings means 28 ribs. There are 2 full size ribs in the center> section, bringing the count to 30. Then you have the three partials, one> nose rib and two tail ribs.>> Can someone check my math please? I haven't had breakfast yet, so no> guarantees.... >> Ryan>> On Thu, Nov 6, 2008 at 6:29 AM, Michael Perez wrote:>>> I am confused with the way I see the original wing print and the newer>> 3 piece supplement print. On the original, the full left wing looks to have>> 14 ribs, right up until you get to the middle of the wing, where the new>> center section would be. These ribs are spaced about 11"-12" apart. On the>> new center section print, it shows part of the left wing with a rib 4-1/2">> away from the end rib near the center section. My questions are:>>>> Do you add this "new" rib between the existing ribs shown 11"-12" apart?>> Do you add this "new" rib on the end of the existing ribs? (making the>> wing longer)>> Do you take the original rib count and space them where needed on the new>> wing so that the cables and the like clear and not worry about the 11", 12">> or 4-1/2" spacing?>> How many total ribs are used on each wing section with the 3 piece design?>>>>________________________________________________________________________________Date: Thu, 6 Nov 2008 08:25:39 -0800 (PST)