Original Posted By: Gene Rambo
I need some advice on how to get the angle of the lower wing strut fittings to match the angle of the wing struts. There are several discussions on this in the archives, with the consensus being that the tabs should be bent up 30 degrees, rather than the 20 degrees shown in the plans. My fuselage is already covered and now I find that the tabs need to be bent up further to the required 30 degree angle. I don't see any way to bend them in place without damage to the fuselage.So my question is, would it be OK to bolt an additional tab to the existing tab to get the correct angle? I saw a Pietenpol with such an arrangement several years ago. It would cause some bending stress on the existing tabs, but not sure if this would be a problem.Any experience out there with this problem? Any other suggestions? Larry Morlock________________________________________________________________________________
Pietenpol-List: Wing Strut Fitting Angle
RE: Pietenpol-List: Piet Directory
Original Posted By:> jack(at)textors.com
can't open it.Gene
can't open it.Gene
RE: Pietenpol-List: Wing Strut Fitting Angle
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Larry,Is it not possible to bend the tabs of your existing fittings? If the boltsand longerons are strong enough to handle flight and landing loads, I wouldthink that you could bend the tabs with a correctly designed lever withoutdamaging the structure. I would make a lever out of a couple of pieces of substantial angle iron -maybe 8' long 2" x 2", welded together to make a T section (so you canapply a load without getting a twist) and weld some sort of receptacle onthe end that can slip over the tab on your fuselage fittings. Have a friendhold the fuselage down and push up on the lever until you have the desiredresult.Otherwise, your idea of an extra fitting to change the angle can probably bemade to work, but needs to be made so that it applies the load along theaxis of the strut. Can your struts be modified to fit the 20 deg. Angle ofyour fittings? I know this would impart some moment to the strut andfitting, but it probably would not be too severe.Do you have any pictures of your fitting and the end of your strut?Jack PhillipsNX899JP "Icarus Plummet"Raleigh, NC _____
Larry,Is it not possible to bend the tabs of your existing fittings? If the boltsand longerons are strong enough to handle flight and landing loads, I wouldthink that you could bend the tabs with a correctly designed lever withoutdamaging the structure. I would make a lever out of a couple of pieces of substantial angle iron -maybe 8' long 2" x 2", welded together to make a T section (so you canapply a load without getting a twist) and weld some sort of receptacle onthe end that can slip over the tab on your fuselage fittings. Have a friendhold the fuselage down and push up on the lever until you have the desiredresult.Otherwise, your idea of an extra fitting to change the angle can probably bemade to work, but needs to be made so that it applies the load along theaxis of the strut. Can your struts be modified to fit the 20 deg. Angle ofyour fittings? I know this would impart some moment to the strut andfitting, but it probably would not be too severe.Do you have any pictures of your fitting and the end of your strut?Jack PhillipsNX899JP "Icarus Plummet"Raleigh, NC _____
RE: Pietenpol-List: Wing Strut Fitting Angle
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Larry,Don't know what others did, and I haven't built the wings yet, but I justmeasured the angle of the strut, as pictured in the scaled drawing, with aprotractor.should be close enough.Gary Boothe
Larry,Don't know what others did, and I haven't built the wings yet, but I justmeasured the angle of the strut, as pictured in the scaled drawing, with aprotractor.should be close enough.Gary Boothe
RE: Pietenpol-List: Wing Strut Fitting Angle
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Sorry, Larry, didn't completely read your post. I would follow Jack'sadvice.Gary Boothe
Sorry, Larry, didn't completely read your post. I would follow Jack'sadvice.Gary Boothe
Re: Pietenpol-List: Piet Directory
Original Posted By: Gene Rambo
I can't open it either. I don't have XL on this computer. We went down this road a few weeks back. Chuck ----- Original Message -----
I can't open it either. I don't have XL on this computer. We went down this road a few weeks back. Chuck ----- Original Message -----
RE: Pietenpol-List: Wing Strut Fitting Angle
Original Posted By: owner-pietenpol-list-server(at)matronics.com
LarryA Piet near where Gary Boothe lives had the same problem because they raisedthe wing. You can see in the picture in the following link that theymachined an aluminum fitting to bolt between the wing strut and the lowerfitting.http://westcoastpiet.com/images/O%20Har ... 032.JPGNot sure about the engineering, but their plane has about 40 hours on it.ChrisSacramento, CaWestcoastpiet.com _____
LarryA Piet near where Gary Boothe lives had the same problem because they raisedthe wing. You can see in the picture in the following link that theymachined an aluminum fitting to bolt between the wing strut and the lowerfitting.http://westcoastpiet.com/images/O%20Har ... 032.JPGNot sure about the engineering, but their plane has about 40 hours on it.ChrisSacramento, CaWestcoastpiet.com _____
Re: Pietenpol-List: clear doped look
Original Posted By: Ken Chambers
NX799B will be sporting a "faux" clear doped linen look when she makes hernext public appearance. I spoke with Tom Brown who just used clear dope onhis wings, and a few other guys for their experience. Since she'll behangared, the UV shouldn't be an issue for a LONG time. I wanted tosimulate the doped linen look of the early planes, where the fabric almosttook on a "tea stained, parchment look" that and was translucent whenbacklit imparting a beautifully light and ethereal quality to the planes. I tested a bunch of squares and came upon the following recipe. After thefirst nitrate coats are applied to ensure the Dacron fibers areencapsulated, we mixed up clear butyrate with some polyfiber UV blocker(called them and they said it was compatible) which is an amber color, andthen added some various organic pigment powders to get the straw color Iwanted. I've read a report from the NASM restoration facility where theydid longevity and exposure tests on clear coatings and actually found thatgood quality UV spar varnished applied to the fabric outlasted everythingelse by far. I tried that over the dope, but it left a super shiny surfacewhich bothered me, so maybe I'll just do that on the top of the wing forsome added UV. Don Emch recovered my wings and used this recipe and they really look nice.DouwePs. Whoever asked for pics of my seat back, I'll get them out just as soonas my camera is returned.________________________________________________________________________________Date: Sat, 5 Feb 2011 10:44:07 -0600Subject: Re: Pietenpol-List: clear doped look
NX799B will be sporting a "faux" clear doped linen look when she makes hernext public appearance. I spoke with Tom Brown who just used clear dope onhis wings, and a few other guys for their experience. Since she'll behangared, the UV shouldn't be an issue for a LONG time. I wanted tosimulate the doped linen look of the early planes, where the fabric almosttook on a "tea stained, parchment look" that and was translucent whenbacklit imparting a beautifully light and ethereal quality to the planes. I tested a bunch of squares and came upon the following recipe. After thefirst nitrate coats are applied to ensure the Dacron fibers areencapsulated, we mixed up clear butyrate with some polyfiber UV blocker(called them and they said it was compatible) which is an amber color, andthen added some various organic pigment powders to get the straw color Iwanted. I've read a report from the NASM restoration facility where theydid longevity and exposure tests on clear coatings and actually found thatgood quality UV spar varnished applied to the fabric outlasted everythingelse by far. I tried that over the dope, but it left a super shiny surfacewhich bothered me, so maybe I'll just do that on the top of the wing forsome added UV. Don Emch recovered my wings and used this recipe and they really look nice.DouwePs. Whoever asked for pics of my seat back, I'll get them out just as soonas my camera is returned.________________________________________________________________________________Date: Sat, 5 Feb 2011 10:44:07 -0600Subject: Re: Pietenpol-List: clear doped look
Pietenpol-List: Re: Piet Directory
Original Posted By: "Douwe Blumberg"
Try openoffice.org free download.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Try openoffice.org free download.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Re: Pietenpol-List: clear doped look
Original Posted By: Rick Holland
Subject: Re: Pietenpol-List: clear doped look
Subject: Re: Pietenpol-List: clear doped look
Re: Pietenpol-List: Wing Strut Fitting Angle
Original Posted By: helspersew(at)aol.com
Dang.generambo(at)msn.com wrote:> not an urban legend, they WILL work themselves back out.--------Mark ChouinardWings, Center Section and Empannage framed up - Working on FuselageRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Re: Pietenpol-List: Wing Strut Fitting Angle
Dang.generambo(at)msn.com wrote:> not an urban legend, they WILL work themselves back out.--------Mark ChouinardWings, Center Section and Empannage framed up - Working on FuselageRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Re: Pietenpol-List: Wing Strut Fitting Angle
Original Posted By: Larry Morlock
Larry,Last year I was helping a friend attach his wings on his Super Cub kit. He had an expert (really) helping him who had tons of experience with this. He actually took a large crescent wrench and bent the tab angle to fit the wing strut. I also bent my fittings this way when mine needed some tweaking. That 4130 is soft enough to give a little.Dan HelsperPoplar Grove, IL.-----Original Message-----
Larry,Last year I was helping a friend attach his wings on his Super Cub kit. He had an expert (really) helping him who had tons of experience with this. He actually took a large crescent wrench and bent the tab angle to fit the wing strut. I also bent my fittings this way when mine needed some tweaking. That 4130 is soft enough to give a little.Dan HelsperPoplar Grove, IL.-----Original Message-----
Pietenpol-List: Re: Wing Strut Fitting Angle
Original Posted By: "Dangerous Dave"
So you won't need to buy dimple tape then.Clif "If you view all the things that happen to you, both good and bad, as opportunities, then you operate out of a higher level of consciousness." ~ Les Brown>> If those nails really do work themselves out, I am in heap-o-trouble >> since I put in about a million to hold that plywood in place.>>>> Dan Helsper>> Poplar Grove, IL.________________________________________________________________________________Subject: Pietenpol-List: Re: Wing Strut Fitting Angle
So you won't need to buy dimple tape then.Clif "If you view all the things that happen to you, both good and bad, as opportunities, then you operate out of a higher level of consciousness." ~ Les Brown>> If those nails really do work themselves out, I am in heap-o-trouble >> since I put in about a million to hold that plywood in place.>>>> Dan Helsper>> Poplar Grove, IL.________________________________________________________________________________Subject: Pietenpol-List: Re: Wing Strut Fitting Angle
Original Posted By: "Douwe Blumberg"
Dan has it pegged.Just use a crescent wrench,I had to do the same thing on mineand on a clipped wing cub.Putting in a link is a bad idea,in tension it has strengthbut in compression it wont and in turbulence or a not so soft landingyour wings could droop or rotate leaving you.... dave--------Covering PietRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Dan has it pegged.Just use a crescent wrench,I had to do the same thing on mineand on a clipped wing cub.Putting in a link is a bad idea,in tension it has strengthbut in compression it wont and in turbulence or a not so soft landingyour wings could droop or rotate leaving you.... dave--------Covering PietRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Re: Pietenpol-List: Wing Strut Fitting Angle
Original Posted By: Jack Phillips
The ayes have it! Jack, Dan and Dave all agree I should be able to bend the tabs in place to get the correct angle to match the angle of the wing struts. I'll give it a try.Jack, I don't see any way to change the strut ends to match the angle of the fitting tabs and keep the load along the axis of the strut. I think this is the basic problem with modifying either the tabs or the struts, so bending the tabs in place seems to be the best answer.Thanks for the responses. Larry----- Original Message -----
The ayes have it! Jack, Dan and Dave all agree I should be able to bend the tabs in place to get the correct angle to match the angle of the wing struts. I'll give it a try.Jack, I don't see any way to change the strut ends to match the angle of the fitting tabs and keep the load along the axis of the strut. I think this is the basic problem with modifying either the tabs or the struts, so bending the tabs in place seems to be the best answer.Thanks for the responses. Larry----- Original Message -----
Re: Pietenpol-List: Wing Strut Fitting Angle
Original Posted By: Chris
Chris, thanks for the picture. This machined fitting is very similar to the Piet I saw a few years ago, but not the same one. Based on everyone's input, I plan to bend the tabs in place to the correct angle. Larry ----- Original Message -----
Chris, thanks for the picture. This machined fitting is very similar to the Piet I saw a few years ago, but not the same one. Based on everyone's input, I plan to bend the tabs in place to the correct angle. Larry ----- Original Message -----
RE: Pietenpol-List: Wing Strut Fitting Angle
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Larry,I liked Dan's suggestion about using a Crescent wrench to bend the tab. Ifyou find you don't have enough "Oooomph" with a wrench, try slipping a pieceof pipe over the end of the wrench to extend the handle. That should givebetter leverage as well as finer control of the bend.Jack PhillipsNX899JP "Icarus Plummet"Raleigh, NC _____
Larry,I liked Dan's suggestion about using a Crescent wrench to bend the tab. Ifyou find you don't have enough "Oooomph" with a wrench, try slipping a pieceof pipe over the end of the wrench to extend the handle. That should givebetter leverage as well as finer control of the bend.Jack PhillipsNX899JP "Icarus Plummet"Raleigh, NC _____
> Pietenpol-List: Piet Directory
Original Posted By: "Jack Phillips"
> > Hello all=2C I just sent the listing to all that have submitted their info.> If you didn't receive the listing and want to be included fill out the> template and return to my home email jack(at)textors.com. > Thanks=2C> Jack> > > Jack Textor> 29 SW 58th Drive> Des Moines=2C IA 50312> www.textors.com> > ________________________________________________________________________________
> > Hello all=2C I just sent the listing to all that have submitted their info.> If you didn't receive the listing and want to be included fill out the> template and return to my home email jack(at)textors.com. > Thanks=2C> Jack> > > Jack Textor> 29 SW 58th Drive> Des Moines=2C IA 50312> www.textors.com> > ________________________________________________________________________________
> Pietenpol-List: Piet Directory
Original Posted By: "Gboothe5"
> > Hello all, I just sent the listing to all that have submitted their info. > If you didn't receive the listing and want to be included fill out the > template and return to my home email jack(at)textors.com. > Thanks, > Jack > > > Jack Textor > 29 SW 58th Drive > Des Moines, IA 50312 > www.textors.com > > ________________________________________________________________________________
> > Hello all, I just sent the listing to all that have submitted their info. > If you didn't receive the listing and want to be included fill out the > template and return to my home email jack(at)textors.com. > Thanks, > Jack > > > Jack Textor > 29 SW 58th Drive > Des Moines, IA 50312 > www.textors.com > > ________________________________________________________________________________