Original Posted By: "Christopher Friel"
Subject: Pietenpol-List: Rib stitching question
Pietenpol-List: Rib stitching question
RE: Pietenpol-List: Rib stitching question
Original Posted By: "Phillips, Jack"
Subject: Pietenpol-List: Cable & Lines - routingIn a message dated 11/17/04 7:38:33 AM Central Standard Time, douweblumberg(at)earthlink.net writes:>Douwe, I prefer to have access to items that may need future service. I ran the oil pressure line, and oil temp line along the starboard side of the front cockpit, secured under the longeron, with rubber coated aluminum Adel clamps (Pclamps), and they are completely out of the way of the front passenger, or camping cargo. Now, the port side of the front pit is another story. I used a3/8" steel tubing from the throttle lever, to just under the front panel, nearthe forward cabane strut. From there I used a J3 throttle cable to the carb. I used the length of the throttle cable to determine how long the 3/8" push / pull tube would be. The Tach cable was the biggest challenge, because there was just no way to route it to the back of the tach, which is down low on the port side of my instrument panel. I even made a tapered wedge to mount the tach in, so it faces the pilot a little bit, and helps keep the tach cable pointa little bit toward the longeron. The tach cable sticks out of the front of the panel, right in the way of passenger climbing in and out. I also have theP-Leads, Pitot & Static lines, Carb heat cable, Fuel shut off cable, battery leads are aircraft wire from the firewall mounted battery, smoke pump wire, and now I plan on running a fuel mixture cable to the carb. Lots of stuff there, but it is secure, and I haven't had any problems with any of it, exceptfor the appearance. While we're talking about planning stuff in the front pit, I also have 4 hard points on the floor, to secure cargo to. The front onesare a fitting bolted to the lower, inner engine mount brackets. Last spring, I changed the EL brackets on the inside of the forward landing gear / lift strut attach point. I used .060 4130 steel, and instead of just bending an EL,I added enough material to the vertical leg, to make a slight bend in at the top, drilled a 1/4" hole in it, and I have two more hard points to secure cargo.Chuck GantzerNX770CG________________________________________________________________________________Subject: RE: Pietenpol-List: Rib stitching questionDate: Wed, 17 Nov 2004 14:54:00 -0000
Subject: Pietenpol-List: Cable & Lines - routingIn a message dated 11/17/04 7:38:33 AM Central Standard Time, douweblumberg(at)earthlink.net writes:>Douwe, I prefer to have access to items that may need future service. I ran the oil pressure line, and oil temp line along the starboard side of the front cockpit, secured under the longeron, with rubber coated aluminum Adel clamps (Pclamps), and they are completely out of the way of the front passenger, or camping cargo. Now, the port side of the front pit is another story. I used a3/8" steel tubing from the throttle lever, to just under the front panel, nearthe forward cabane strut. From there I used a J3 throttle cable to the carb. I used the length of the throttle cable to determine how long the 3/8" push / pull tube would be. The Tach cable was the biggest challenge, because there was just no way to route it to the back of the tach, which is down low on the port side of my instrument panel. I even made a tapered wedge to mount the tach in, so it faces the pilot a little bit, and helps keep the tach cable pointa little bit toward the longeron. The tach cable sticks out of the front of the panel, right in the way of passenger climbing in and out. I also have theP-Leads, Pitot & Static lines, Carb heat cable, Fuel shut off cable, battery leads are aircraft wire from the firewall mounted battery, smoke pump wire, and now I plan on running a fuel mixture cable to the carb. Lots of stuff there, but it is secure, and I haven't had any problems with any of it, exceptfor the appearance. While we're talking about planning stuff in the front pit, I also have 4 hard points on the floor, to secure cargo to. The front onesare a fitting bolted to the lower, inner engine mount brackets. Last spring, I changed the EL brackets on the inside of the forward landing gear / lift strut attach point. I used .060 4130 steel, and instead of just bending an EL,I added enough material to the vertical leg, to make a slight bend in at the top, drilled a 1/4" hole in it, and I have two more hard points to secure cargo.Chuck GantzerNX770CG________________________________________________________________________________Subject: RE: Pietenpol-List: Rib stitching questionDate: Wed, 17 Nov 2004 14:54:00 -0000
Pietenpol-List: Re: Rib stitching question
Original Posted By: "dfwplt"
2 1/2" spacing pulls the fabric up against the ribs in the under camber area onthe bottom of the wing. 3 1/2" spacing leaves a little gap between stitches.Is it worth making that area 2 1/2" spacing to avoid that gap? Sent from my smartphone.________________________________________________________________________________Subject: Pietenpol-List: Re: Rib stitching question
2 1/2" spacing pulls the fabric up against the ribs in the under camber area onthe bottom of the wing. 3 1/2" spacing leaves a little gap between stitches.Is it worth making that area 2 1/2" spacing to avoid that gap? Sent from my smartphone.________________________________________________________________________________Subject: Pietenpol-List: Re: Rib stitching question
Original Posted By: Jim Boyer
Pics of that rib stitching gap...not the best pics but will hopefully give youan idea of the gap....anything to worry about?Read this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/imag ... ______Date: Fri, 7 Nov 2014 16:58:48 +0000 (UTC)
Pics of that rib stitching gap...not the best pics but will hopefully give youan idea of the gap....anything to worry about?Read this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/imag ... ______Date: Fri, 7 Nov 2014 16:58:48 +0000 (UTC)
Pietenpol-List: Re: Rib stitching question
Original Posted By: Ray Krause
Look at the rib stitching and hi-speed tape starting at 1:08 of this video. It'sa good reminder (to me, anyway), of how much force is pulling on that fabric,which in turn is pulling on those stitches. Gentle climbing turn, under 70 mph:https://www.youtube.com/watch?v=ZdcKXbX8eVwI'd stitch closely (2.5" vs 3.5") and follow other instructions from the fabricsystem manufacturer. This may be being overly cautious, but separation of fabricfrom structure has occurred, and with deadly outcomes:http://www.ntsb.gov/aviationquery/brief.aspx?ev_id 001207X03218&key=1Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Look at the rib stitching and hi-speed tape starting at 1:08 of this video. It'sa good reminder (to me, anyway), of how much force is pulling on that fabric,which in turn is pulling on those stitches. Gentle climbing turn, under 70 mph:https://www.youtube.com/watch?v=ZdcKXbX8eVwI'd stitch closely (2.5" vs 3.5") and follow other instructions from the fabricsystem manufacturer. This may be being overly cautious, but separation of fabricfrom structure has occurred, and with deadly outcomes:http://www.ntsb.gov/aviationquery/brief.aspx?ev_id 001207X03218&key=1Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Re: Pietenpol-List: Re: Rib stitching question
Original Posted By: "Jack Phillips"
Should the lower portion of the wing be stitched BEFORE shrinking?Ray KrauseBuilding SkyScoutSent from my iPad> On Nov 7, 2014, at 4:53 AM, dfwplt wrote:> > > Pics of that rib stitching gap...not the best pics but will hopefully give youan idea of the gap....anything to worry about?> > > > > Read this topic online here:> > http://forums.matronics.com/viewtopic.p ... 111#433111> > > > > Attachments: > > http://forums.matronics.com//files/image_667.jpg> http://forums.matronics.com//files/image_994.jpg> > > > > > > ________________________________________________________________________________
Should the lower portion of the wing be stitched BEFORE shrinking?Ray KrauseBuilding SkyScoutSent from my iPad> On Nov 7, 2014, at 4:53 AM, dfwplt wrote:> > > Pics of that rib stitching gap...not the best pics but will hopefully give youan idea of the gap....anything to worry about?> > > > > Read this topic online here:> > http://forums.matronics.com/viewtopic.p ... 111#433111> > > > > Attachments: > > http://forums.matronics.com//files/image_667.jpg> http://forums.matronics.com//files/image_994.jpg> > > > > > > ________________________________________________________________________________
RE: Pietenpol-List: Re: Rib stitching question
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Like many factors in building the answer is"it depends".I used the PolyFiber process and in their process if I remember correctly (Idid this over 10 years ago), they had you glue the fabric to the ribs, thenheat shrink at 250 degrees, then rib stitch, then do the 300 and 350 degreeshrinks.Read and FOLLOW the manual for whatever process you are using. If theymanual doesn't cover how to do undercambered wings, call their customersupport line and ask them. Use their resources, not someone on an emaillist that may or may not be familiar with their process.Good Luck!Jack PhillipsNX899JPSmith Mountain Lake, Virginia-----Original Message-----
Like many factors in building the answer is"it depends".I used the PolyFiber process and in their process if I remember correctly (Idid this over 10 years ago), they had you glue the fabric to the ribs, thenheat shrink at 250 degrees, then rib stitch, then do the 300 and 350 degreeshrinks.Read and FOLLOW the manual for whatever process you are using. If theymanual doesn't cover how to do undercambered wings, call their customersupport line and ask them. Use their resources, not someone on an emaillist that may or may not be familiar with their process.Good Luck!Jack PhillipsNX899JPSmith Mountain Lake, Virginia-----Original Message-----
Re: Pietenpol-List: Re: Rib stitching question
Original Posted By:> owner-pietenpol-list-server(at)matronics.com
Thanks, Jack. Great advice on all points. I will be using the Stewart System andwill follow all their directions. I am still on schedule to start covering inDecember. Looking forward to it.Ray KrauseSent from my iPad> On Nov 7, 2014, at 1:58 PM, Jack Phillips wrote:> > > Like many factors in building the answer is"it depends".> > I used the PolyFiber process and in their process if I remember correctly (I> did this over 10 years ago), they had you glue the fabric to the ribs, then> heat shrink at 250 degrees, then rib stitch, then do the 300 and 350 degree> shrinks.> > Read and FOLLOW the manual for whatever process you are using. If they> manual doesn't cover how to do undercambered wings, call their customer> support line and ask them. Use their resources, not someone on an email> list that may or may not be familiar with their process.> > Good Luck!> > Jack Phillips> NX899JP> Smith Mountain Lake, Virginia> > -----Original Message-----
Thanks, Jack. Great advice on all points. I will be using the Stewart System andwill follow all their directions. I am still on schedule to start covering inDecember. Looking forward to it.Ray KrauseSent from my iPad> On Nov 7, 2014, at 1:58 PM, Jack Phillips wrote:> > > Like many factors in building the answer is"it depends".> > I used the PolyFiber process and in their process if I remember correctly (I> did this over 10 years ago), they had you glue the fabric to the ribs, then> heat shrink at 250 degrees, then rib stitch, then do the 300 and 350 degree> shrinks.> > Read and FOLLOW the manual for whatever process you are using. If they> manual doesn't cover how to do undercambered wings, call their customer> support line and ask them. Use their resources, not someone on an email> list that may or may not be familiar with their process.> > Good Luck!> > Jack Phillips> NX899JP> Smith Mountain Lake, Virginia> > -----Original Message-----
Re: Pietenpol-List: Rib stitching question
Original Posted By: "Charles N. Campbell"
Subject: Re: Pietenpol-List: Rib stitching question
Subject: Re: Pietenpol-List: Rib stitching question
> Re: Pietenpol-List: Rib stitching question
Original Posted By:> "Charles N. Campbell"
Seems like attaching the fabric to the ribs after the initial shrink is common. I was able to work the Stewart Systems down through the fabric while using weights to hold it down against the ribs. No more gaps between the stitches. Sent from my smartphone.> On Nov 10, 2014, at 2:00 AM, > Subject: Re: Pietenpol-List: Rib stitching question
Seems like attaching the fabric to the ribs after the initial shrink is common. I was able to work the Stewart Systems down through the fabric while using weights to hold it down against the ribs. No more gaps between the stitches. Sent from my smartphone.> On Nov 10, 2014, at 2:00 AM, > Subject: Re: Pietenpol-List: Rib stitching question