Pietenpol-List: Fuselage cracking
Pietenpol-List: Fuselage cracking
Original Posted By: "aabreu"
So if my airplane sits at a deck angle of about 12.5 degrees in the 3-point attitudeand the different length cabane struts add another 2 degrees of incidenceto the wing, my wing is at about a 14.5 degree angle of incidence when I three-pointit. Pretty close to what the Eppler code brings up on paper for fullstall. Hmmm... maybe Mr. Pietenpol had a home-brew wind tunnel out behind thebarn, powered by a Model A up on blocks with a leather belt running the windtunnel blower ;o)--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Fuselage cracking
So if my airplane sits at a deck angle of about 12.5 degrees in the 3-point attitudeand the different length cabane struts add another 2 degrees of incidenceto the wing, my wing is at about a 14.5 degree angle of incidence when I three-pointit. Pretty close to what the Eppler code brings up on paper for fullstall. Hmmm... maybe Mr. Pietenpol had a home-brew wind tunnel out behind thebarn, powered by a Model A up on blocks with a leather belt running the windtunnel blower ;o)--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "AircamperN11MS"
I thought I should post our findings from this years annual. Fairly serious. Discovered some cracks in the fuselage. They were through the strut attach fittingand the cracks ran through the bolt holes. See videos. Poor workmanship is our guess. Not sure if the plans were followed. Gussets inthe front cockpit seem insufficient and we hope others aren't built like this.This is a higher stress area, so we were surprised to see how small the gussetswere. Will post pictures of our repair on picasa and share the link for you folks. The repair will take us a few weeks, which is eating into our flying season!https://youtu.be/dgiysgWhQdMhttps://you ... R7xeHMAndy AbreuN6186LEAA582Toledo ohRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
I thought I should post our findings from this years annual. Fairly serious. Discovered some cracks in the fuselage. They were through the strut attach fittingand the cracks ran through the bolt holes. See videos. Poor workmanship is our guess. Not sure if the plans were followed. Gussets inthe front cockpit seem insufficient and we hope others aren't built like this.This is a higher stress area, so we were surprised to see how small the gussetswere. Will post pictures of our repair on picasa and share the link for you folks. The repair will take us a few weeks, which is eating into our flying season!https://youtu.be/dgiysgWhQdMhttps://you ... R7xeHMAndy AbreuN6186LEAA582Toledo ohRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "tools"
Wow, Do you happen to know what kind of glue was used during construction? Theremust be some structural members broken as well. I am very curious to whatyou find and how you correct the issues. I am an EAA Tech Counselor and I try to stay educated so I can hopefully keep someoneelse from having a similar issue. Please keep us posted. Many thanks,--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Wow, Do you happen to know what kind of glue was used during construction? Theremust be some structural members broken as well. I am very curious to whatyou find and how you correct the issues. I am an EAA Tech Counselor and I try to stay educated so I can hopefully keep someoneelse from having a similar issue. Please keep us posted. Many thanks,--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "taildrags"
Nice day at KLNC. We had Lunch and then flight..3rd GN-1 fella flew formation w/us,but in his Cherokee. I suppose we could call it a fly in..--------KLNCA65-8N2308CSlick 4330'sAN HardwareAirframe 755TTW72CK-42 SensenichStandard Factory GN-1Read this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/img_ ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Nice day at KLNC. We had Lunch and then flight..3rd GN-1 fella flew formation w/us,but in his Cherokee. I suppose we could call it a fly in..--------KLNCA65-8N2308CSlick 4330'sAN HardwareAirframe 755TTW72CK-42 SensenichStandard Factory GN-1Read this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/img_ ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "AircamperN11MS"
I wish I had been there. Great pics.--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
I wish I had been there. Great pics.--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "tools"
Regarding Tools negative G comment. I hadn't thought of that either, but.....I am now thinking that the three piece wing like I have would be more likelyto do that then a single piece wing. The three piece wing has a built in hingepoint just outside the center section. I am thinking that the single sparwould actually be stronger. Does this plane have a three piece wing? Very interesting observation Tools.--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Regarding Tools negative G comment. I hadn't thought of that either, but.....I am now thinking that the three piece wing like I have would be more likelyto do that then a single piece wing. The three piece wing has a built in hingepoint just outside the center section. I am thinking that the single sparwould actually be stronger. Does this plane have a three piece wing? Very interesting observation Tools.--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "aabreu"
Given the moment the wing strut has, I don't think a one piece would help. Wooddoesn't resist all that much for as much movement as is needed for that failure.I do believe the one piece is stronger to the point of being worthwhile though.Need more of this stuff catalogued. Tons to be learned.My completely uneducated guess would be turbulence. It's benign enough to causeit and go unnoticed for a while. Which begs the question, how did you findit?Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Given the moment the wing strut has, I don't think a one piece would help. Wooddoesn't resist all that much for as much movement as is needed for that failure.I do believe the one piece is stronger to the point of being worthwhile though.Need more of this stuff catalogued. Tons to be learned.My completely uneducated guess would be turbulence. It's benign enough to causeit and go unnoticed for a while. Which begs the question, how did you findit?Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "AircamperN11MS"
tools wrote:> Given the moment the wing strut has, I don't think a one piece would help. Wooddoesn't resist all that much for as much movement as is needed for that failure.> > I do believe the one piece is stronger to the point of being worthwhile though.> > Need more of this stuff catalogued. Tons to be learned.> > My completely uneducated guess would be turbulence. It's benign enough to causeit and go unnoticed for a while. Which begs the question, how did you findit?Hi Tools,I'm an engineer by training. For what it's worth.I agree that this failure could be a result of negative G's of some kind.However, if you look at the video, we are lifting the right wing. This shouldbe putting a compressive load across the plywood. When flying, the strut is intension and the plywood should be in compression. So why does the crack openup when we lift on the wing. I think it has something do with the right landinggear with all the weight on one tire or the left hand tire hanging down.Can't wrap my brain around it yet. But there is clearly a tension force pullingthe plywood apart when the airplane is put on one tire. Maybe this is couldbe cause by a hard landing on the right tire. Speculation. Took some additional photos but nothing really stands out.Like I said before, the gussets in the cockpit seem incorrectly sized.ThanksAndy Abreu6186LEAA582Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
tools wrote:> Given the moment the wing strut has, I don't think a one piece would help. Wooddoesn't resist all that much for as much movement as is needed for that failure.> > I do believe the one piece is stronger to the point of being worthwhile though.> > Need more of this stuff catalogued. Tons to be learned.> > My completely uneducated guess would be turbulence. It's benign enough to causeit and go unnoticed for a while. Which begs the question, how did you findit?Hi Tools,I'm an engineer by training. For what it's worth.I agree that this failure could be a result of negative G's of some kind.However, if you look at the video, we are lifting the right wing. This shouldbe putting a compressive load across the plywood. When flying, the strut is intension and the plywood should be in compression. So why does the crack openup when we lift on the wing. I think it has something do with the right landinggear with all the weight on one tire or the left hand tire hanging down.Can't wrap my brain around it yet. But there is clearly a tension force pullingthe plywood apart when the airplane is put on one tire. Maybe this is couldbe cause by a hard landing on the right tire. Speculation. Took some additional photos but nothing really stands out.Like I said before, the gussets in the cockpit seem incorrectly sized.ThanksAndy Abreu6186LEAA582Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Original Posted By: dndboyd2(at)gmail.com
Hi Andy,Air loads will be different than the loads you are putting on it while the planeis on the ground. When you lift the wing, you are loading up the Right maingear in compression, which is in turn putting a tension load on the Left maingear. Does that make sense? In flight, there is no load on the landing gear.Another thought here, With the demonstration you have provided, maybe just a hardlanding on the right main caused this issue??? Not a negative G issue. Thoughts everyone,--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Hi Andy,Air loads will be different than the loads you are putting on it while the planeis on the ground. When you lift the wing, you are loading up the Right maingear in compression, which is in turn putting a tension load on the Left maingear. Does that make sense? In flight, there is no load on the landing gear.Another thought here, With the demonstration you have provided, maybe just a hardlanding on the right main caused this issue??? Not a negative G issue. Thoughts everyone,--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
> Pietenpol-List: Re: Fuselage cracking
Original Posted By:> "AircamperN11MS"
Re the cracked fuse around the landing gear mounts. On my set up the wheels splayoutwards on landing and "pull" on the gear legs. This exerts a pull on theopposite side of the fuse. This will explain the cracks seen on the longeronson this airplane. Probably caused by a few hard landings and or improper buildingtechnique i.e. Not strong enough. Sent from my iPhone> On May 6, 2016, at 3:03 AM, Pietenpol-List Digest Server wrote:> > *> > =================================================> Online Versions of Today's List Digest Archive> =================================================> > Today's complete Pietenpol-List Digest can also be found in either of the > two Web Links listed below. The .html file includes the Digest formatted > in HTML for viewing with a web browser and features Hyperlinked Indexes > and Message Navigation. The .txt file includes the plain ASCII version > of the Pietenpol-List Digest and can be viewed with a generic text editor > such as Notepad or with a web browser. > > HTML Version:> > http://www.matronics.com/digest/digestv ... ml&Chapter 16-05-05&Archive=Pietenpol> > Text Version:> > http://www.matronics.com/digest/digestv ... xt&Chapter 16-05-05&Archive=Pietenpol> > > ===============================================> EMail Version of Today's List Digest Archive> ===============================================> > > ----------------------------------------------------------> Pietenpol-List Digest Archive> ---> Total Messages Posted Thu 05/05/16: 5> ----------------------------------------------------------> > > Today's Message Index:> ----------------------> > 1. 12:00 PM - Re: Fuselage cracking (AircamperN11MS)> 2. 12:02 PM - Re: Fuselage cracking (tools)> 3. 06:38 PM - Cinco de Mayo GN-1 Fly In (TriScout)> 4. 09:14 PM - Re: Fuselage cracking (taildrags)> 5. 09:17 PM - Re: Cinco de Mayo GN-1 Fly In (taildrags)> > > > ________________________________ Message 1 _____________________________________> > > Subject: Pietenpol-List: Re: Fuselage cracking
Re the cracked fuse around the landing gear mounts. On my set up the wheels splayoutwards on landing and "pull" on the gear legs. This exerts a pull on theopposite side of the fuse. This will explain the cracks seen on the longeronson this airplane. Probably caused by a few hard landings and or improper buildingtechnique i.e. Not strong enough. Sent from my iPhone> On May 6, 2016, at 3:03 AM, Pietenpol-List Digest Server wrote:> > *> > =================================================> Online Versions of Today's List Digest Archive> =================================================> > Today's complete Pietenpol-List Digest can also be found in either of the > two Web Links listed below. The .html file includes the Digest formatted > in HTML for viewing with a web browser and features Hyperlinked Indexes > and Message Navigation. The .txt file includes the plain ASCII version > of the Pietenpol-List Digest and can be viewed with a generic text editor > such as Notepad or with a web browser. > > HTML Version:> > http://www.matronics.com/digest/digestv ... ml&Chapter 16-05-05&Archive=Pietenpol> > Text Version:> > http://www.matronics.com/digest/digestv ... xt&Chapter 16-05-05&Archive=Pietenpol> > > ===============================================> EMail Version of Today's List Digest Archive> ===============================================> > > ----------------------------------------------------------> Pietenpol-List Digest Archive> ---> Total Messages Posted Thu 05/05/16: 5> ----------------------------------------------------------> > > Today's Message Index:> ----------------------> > 1. 12:00 PM - Re: Fuselage cracking (AircamperN11MS)> 2. 12:02 PM - Re: Fuselage cracking (tools)> 3. 06:38 PM - Cinco de Mayo GN-1 Fly In (TriScout)> 4. 09:14 PM - Re: Fuselage cracking (taildrags)> 5. 09:17 PM - Re: Cinco de Mayo GN-1 Fly In (taildrags)> > > > ________________________________ Message 1 _____________________________________> > > Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "tools"
yes, Sierra Golf has an 0-200 and an electrical sys, while mine is an A65 and none.We seemed to have about the same cruise speed though, but of course whenwe took off together, he climbed a bit better. Pic's were all cellphone photos.I had gopro shots of SG inflight, but no zoom lense..it was a bit shakey.--------KLNCA65-8N2308CSlick 4330'sAN HardwareAirframe 755TTW72CK-42 SensenichStandard Factory GN-1Read this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/img_ ... ___Subject: Pietenpol-List: Re: Fuselage cracking
yes, Sierra Golf has an 0-200 and an electrical sys, while mine is an A65 and none.We seemed to have about the same cruise speed though, but of course whenwe took off together, he climbed a bit better. Pic's were all cellphone photos.I had gopro shots of SG inflight, but no zoom lense..it was a bit shakey.--------KLNCA65-8N2308CSlick 4330'sAN HardwareAirframe 755TTW72CK-42 SensenichStandard Factory GN-1Read this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/img_ ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "AircamperN11MS"
Thought about that, but then decided with the gear in the ground, you have an opposingforce to the momentum of the wing drooping?In flight, you wouldn't. HATE you've got damage, but a lot to be learned, and very impressed you caughtit!ToolsRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Thought about that, but then decided with the gear in the ground, you have an opposingforce to the momentum of the wing drooping?In flight, you wouldn't. HATE you've got damage, but a lot to be learned, and very impressed you caughtit!ToolsRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "tkreiner"
Tools,I PM'd you rather than hijacking this important thread.--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Tools,I PM'd you rather than hijacking this important thread.--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "tkreiner"
Andy,>From the pics, the strut attachment is for the forward strut. Your supposition regarding the gusset plates may be the issue, but I'm curiousabout another feature that hasn't been discussed.On the plans, there's a steel strap shown on Sheet 3 of that plans called out (forextra strength only, not for ordinary use).Does your ship have these straps?--------Tom KreinerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Andy,>From the pics, the strut attachment is for the forward strut. Your supposition regarding the gusset plates may be the issue, but I'm curiousabout another feature that hasn't been discussed.On the plans, there's a steel strap shown on Sheet 3 of that plans called out (forextra strength only, not for ordinary use).Does your ship have these straps?--------Tom KreinerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "aabreu"
Andy,Could the information at this link have had anything to do with undetected damageto the left landing gear?Here's the link:http://www.ntsb.gov/_layouts/ntsb.aviat ... aspx?ev_id 100126X43531&key=1--------Tom KreinerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Andy,Could the information at this link have had anything to do with undetected damageto the left landing gear?Here's the link:http://www.ntsb.gov/_layouts/ntsb.aviat ... aspx?ev_id 100126X43531&key=1--------Tom KreinerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "aabreu"
tkreiner wrote:> Andy,> > From the pics, the strut attachment is for the forward strut. > > Your supposition regarding the gusset plates may be the issue, but I'm curiousabout another feature that hasn't been discussed.> > On the plans, there's a steel strap shown on Sheet 3 of that plans called out(for extra strength only, not for ordinary use).> > Does your ship have these straps?Yes. Forward strut.Yes. Have the strap.Andy AbreeuRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
tkreiner wrote:> Andy,> > From the pics, the strut attachment is for the forward strut. > > Your supposition regarding the gusset plates may be the issue, but I'm curiousabout another feature that hasn't been discussed.> > On the plans, there's a steel strap shown on Sheet 3 of that plans called out(for extra strength only, not for ordinary use).> > Does your ship have these straps?Yes. Forward strut.Yes. Have the strap.Andy AbreeuRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "tools"
tkreiner wrote:> Andy,> > Could the information at this link provide insight into any undetected damageto the left landing gear?> > Here's the link:> > http://www.ntsb.gov/_layouts/ntsb.aviat ... aspx?ev_id 100126X43531&key=1Thanks for bringing that one up. Sheesh. I remember when that happened. A guyin our club knocked the back wing off with the PAPI light on 22 at KTDZ. Knockedout the PAPI light too.. which was way more expensive to fix than the horizontalstab. Lesson here, land past the PAPI. Didn't damage the landing gear.We do use this airplane for training. So we do get lots of hard landings in.I tend to not fly this airplane in thunderstorms. Gust loading probably wasn'ta factor. The sharp impulse load that comes along with landing hard is my guessalong with poor workmanship.I have some pictures on my phone i'll download later. Also, we are going to fix this by tomorrow. I'll be sure to take lots of picturesfor everyone.ThanksAndy Abreu6186LEAA 582Toledo Buzzards Light Sport Aircraft Club Inc.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
tkreiner wrote:> Andy,> > Could the information at this link provide insight into any undetected damageto the left landing gear?> > Here's the link:> > http://www.ntsb.gov/_layouts/ntsb.aviat ... aspx?ev_id 100126X43531&key=1Thanks for bringing that one up. Sheesh. I remember when that happened. A guyin our club knocked the back wing off with the PAPI light on 22 at KTDZ. Knockedout the PAPI light too.. which was way more expensive to fix than the horizontalstab. Lesson here, land past the PAPI. Didn't damage the landing gear.We do use this airplane for training. So we do get lots of hard landings in.I tend to not fly this airplane in thunderstorms. Gust loading probably wasn'ta factor. The sharp impulse load that comes along with landing hard is my guessalong with poor workmanship.I have some pictures on my phone i'll download later. Also, we are going to fix this by tomorrow. I'll be sure to take lots of picturesfor everyone.ThanksAndy Abreu6186LEAA 582Toledo Buzzards Light Sport Aircraft Club Inc.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Original Posted By: dndboyd2(at)gmail.com
I also agree with dan's, different thread started, assessment. Seems most likelyif only one wheel hits, opposite to that crack. Other side is fine?I've cut a lot of joints apart only to find poor gluing technique. Not many failed,but clearly weren't as strong as they should be.In floor tile setting, it's recommended you pull up the occasional tile as yougo along to ensure adequate adhesive and setting technique. Should do that gluingup wood also. Consistent dimpling should be obvious, nothing not disturbedor dry. Doesn't take long and gives a great sense of confidence.Tools, who's tested ALL his gear to failure!Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
I also agree with dan's, different thread started, assessment. Seems most likelyif only one wheel hits, opposite to that crack. Other side is fine?I've cut a lot of joints apart only to find poor gluing technique. Not many failed,but clearly weren't as strong as they should be.In floor tile setting, it's recommended you pull up the occasional tile as yougo along to ensure adequate adhesive and setting technique. Should do that gluingup wood also. Consistent dimpling should be obvious, nothing not disturbedor dry. Doesn't take long and gives a great sense of confidence.Tools, who's tested ALL his gear to failure!Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "Catdesigns"
Sure is odd to see plywood split like it does in that video. What's up with that?The whole point of plywood is to provide multi-directional strength and resistanceto splitting.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Sure is odd to see plywood split like it does in that video. What's up with that?The whole point of plywood is to provide multi-directional strength and resistanceto splitting.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Original Posted By: "Jerry Landley"
Any chance we could see some pictures of the inside as well as some more of theoutside?thanks--------ChrisSacramento, CAWestCoastPiet.comRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Any chance we could see some pictures of the inside as well as some more of theoutside?thanks--------ChrisSacramento, CAWestCoastPiet.comRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "aabreu"
After many years of taking photos and video of Pietenpols under construction as well as flying examples I have a couple questions. What is the pathway of the rudder cables between the rudder horns and the rudder bar? I have the elevator cables under the seat and installed a couple small pulleys rather than just have the cable through wood. Where have people run the rudder cable? I can=99t find anything on the plans or in other readings. Also I read that where cables cross each other they should be taped together. What is used to tape them together?Thanks!Ralph HurlbertRaymond, SD________________________________________________________________________________Subject: Pietenpol-List: Re: Fuselage cracking
After many years of taking photos and video of Pietenpols under construction as well as flying examples I have a couple questions. What is the pathway of the rudder cables between the rudder horns and the rudder bar? I have the elevator cables under the seat and installed a couple small pulleys rather than just have the cable through wood. Where have people run the rudder cable? I can=99t find anything on the plans or in other readings. Also I read that where cables cross each other they should be taped together. What is used to tape them together?Thanks!Ralph HurlbertRaymond, SD________________________________________________________________________________Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "womenfly2"
John-Woodcraft sells blanks for turning baseball bats that work well--------Earl BrownI may not have gone where I intended to go, but I think I have ended up where Iintended to be.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
John-Woodcraft sells blanks for turning baseball bats that work well--------Earl BrownI may not have gone where I intended to go, but I think I have ended up where Iintended to be.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Pietenpol-List: Re: Fuselage cracking
Original Posted By: "aabreu"
I looked at your pictures of the aera you are having the issue with. I believethe plans call for "Spruce Wedges" on all sides of the uprights at both gear attachmentpoints ... this Piet does not have them from what I can see in yourpictures.WF2--------Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
I looked at your pictures of the aera you are having the issue with. I believethe plans call for "Spruce Wedges" on all sides of the uprights at both gear attachmentpoints ... this Piet does not have them from what I can see in yourpictures.WF2--------Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Fuselage cracking
Original Posted By: Semih Oksay
womenfly2 wrote:> I looked at your pictures of the area you are having the issue with. I believethe plans call for "Spruce Wedges" not just between the "V" but on all sidesof the uprights at both gear attachment points ... this Piet does not have themfrom what I can see in your pictures of your repair work. You need to add thembetween the outside ply and the new gussets you just installed. This helpsto spread the load over a larger area.> > Just a suggestion. Its your Piet, do as you want.> WF2Thanks for the feedback. I'll discuss it with the others. We still can stick somepieces in there. Not sure if it is really needed with how much we alreadyreinforced that area. Andy AbreuToledo Ohio.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
womenfly2 wrote:> I looked at your pictures of the area you are having the issue with. I believethe plans call for "Spruce Wedges" not just between the "V" but on all sidesof the uprights at both gear attachment points ... this Piet does not have themfrom what I can see in your pictures of your repair work. You need to add thembetween the outside ply and the new gussets you just installed. This helpsto spread the load over a larger area.> > Just a suggestion. Its your Piet, do as you want.> WF2Thanks for the feedback. I'll discuss it with the others. We still can stick somepieces in there. Not sure if it is really needed with how much we alreadyreinforced that area. Andy AbreuToledo Ohio.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
RE: Pietenpol-List: rudder cables and tape
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Ralph I too would like to see pictures. The rudder cables do not cross. You may be thinking of the cables that cross between the center struts. For the rudder cables I=99m currently making pulleys with cable guards that will go below the seat on each side, in line with the rudder bar connection. They will then go through a fairlead attached to the fuselage diaginal, then exit the fuselage side. Clear as mud? You need to keep in mind how you will route the cables for your tailwheel. Some attach them to the rudder cables and others like Jack Phillips run separate cables to the rudder bar. I=99ve not decided which way I plan to do it. Hope this helps some.Jack
Ralph I too would like to see pictures. The rudder cables do not cross. You may be thinking of the cables that cross between the center struts. For the rudder cables I=99m currently making pulleys with cable guards that will go below the seat on each side, in line with the rudder bar connection. They will then go through a fairlead attached to the fuselage diaginal, then exit the fuselage side. Clear as mud? You need to keep in mind how you will route the cables for your tailwheel. Some attach them to the rudder cables and others like Jack Phillips run separate cables to the rudder bar. I=99ve not decided which way I plan to do it. Hope this helps some.Jack