Original Posted By: gboothe5(at)comcast.net
I've made a mock-up of the wooden struts for my Piet, made the lower fittings, inside and out, according to the plans. They don't come close to fitting properly. I then made some fottings out of aluminum foil to re-fit things. That works except I had to move the angles that go up the struts inward a good 1 1/2". that seems like way too much.Does anyone have good drawings or dimensions for these fittings? Any help would be greatly appreciated!!!Jim Quinn________________________________________________________________________________Date: Tue, 30 Apr 2013 23:07:11 +0000 (UTC)
Pietenpol-List: Wooden strut metal fittings - help
Pietenpol-List: Re: Wing Strut Fittings on Spars
Original Posted By: "tools"
Jim,I'm having a hard time figuring out what parts you're talking about. When yousay wooden struts, are you referring to the landing gear? What plans are youworking from? Maybe if you snapped a couple of photos to illustrate your problems,and posted them, it might make it easier to understand.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Wing Strut Fittings on Spars
Jim,I'm having a hard time figuring out what parts you're talking about. When yousay wooden struts, are you referring to the landing gear? What plans are youworking from? Maybe if you snapped a couple of photos to illustrate your problems,and posted them, it might make it easier to understand.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Wing Strut Fittings on Spars
Original Posted By: "Jim Quinn"
The issue that comes into play is whether you can get the pin in from the top,which is the general preference as it cannot fall out as easily. I have a few spots where it HAS to go in from the bottom for clearance reasons.A little longer is better. For all flying purposes, these are in tension, sothe little longer cantilever isn't a big deal.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
The issue that comes into play is whether you can get the pin in from the top,which is the general preference as it cannot fall out as easily. I have a few spots where it HAS to go in from the bottom for clearance reasons.A little longer is better. For all flying purposes, these are in tension, sothe little longer cantilever isn't a big deal.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Re: Pietenpol-List: Re: Wooden strut metal fittings - help
Original Posted By: "Bill Church"
Hi Bill,Thanks and yes, the landing gear. Working on the pics,Jim----- Original Message -----
Hi Bill,Thanks and yes, the landing gear. Working on the pics,Jim----- Original Message -----
Re: Pietenpol-List: Re: Wooden strut metal fittings - help
Original Posted By: gboothe5(at)comcast.net
Pietenpol-List: Re: Emailing: piet fittings
Original Posted By: Jim Boyer
Re: Pietenpol-List: Wing Strut Fittings on Spars
Original Posted By: Jim Boyer
Re: Pietenpol-List: Wing Strut Fittings on Spars
Original Posted By: Jim Boyer
Re: Pietenpol-List: Re: Wing Strut Fittings on Spars
Original Posted By: Jim Boyer
Pietenpol-List: Re: Emailing: piet fittings
Original Posted By: "tools"
Well, we're saying the same thing, it's just tough without pictures...What I'm saying is... hopefully more clearly... is that you need to make the lowerfittings fit the metal you have... The axle needs to fit in there correctly.Now, the angle at the fuse is making the strut "hit" the lower fitting ina way that leads you to believe you need to move it an inch and a half closerto the front one.Don't do that. Just adjust the angle on the end of the strut pieces so that theyfit. While you may have a big gap based on calculated or measured values,it really isn't that big of a 'real' difference.In other, other words (man, ten minutes in a shop and this would be really obvious!),just like Gary says, the end points are fixed. Just MAKE the struts fitthem. Don't cut the end angles based on calculations or measurements off ofplans and expect them to fit. They'll be close, but THEN you need to "scribe"them to fit precisely, which will make them very strong. I make them a littlelong so that the ensuing scribing will shorten them a bit and they'll be prettydarn close to right on as they fit. That "little long" is an amount basedon doing lots of this. It's about a quarterish (?) long generally. You kindof see the part close in on the right length and spot as you scribe it to fit...I have no idea if this helps or not... I've always said a carrier landing is like a free throw in basket ball. Not terriblycomplicated, but try WRITING a description of how to throw a free throw!And in the end, it isn't that complicated, but if you're going to bet yourarse on it, you just gotta be pretty good at it.Does that help?Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Emailing: piet fittings
Well, we're saying the same thing, it's just tough without pictures...What I'm saying is... hopefully more clearly... is that you need to make the lowerfittings fit the metal you have... The axle needs to fit in there correctly.Now, the angle at the fuse is making the strut "hit" the lower fitting ina way that leads you to believe you need to move it an inch and a half closerto the front one.Don't do that. Just adjust the angle on the end of the strut pieces so that theyfit. While you may have a big gap based on calculated or measured values,it really isn't that big of a 'real' difference.In other, other words (man, ten minutes in a shop and this would be really obvious!),just like Gary says, the end points are fixed. Just MAKE the struts fitthem. Don't cut the end angles based on calculations or measurements off ofplans and expect them to fit. They'll be close, but THEN you need to "scribe"them to fit precisely, which will make them very strong. I make them a littlelong so that the ensuing scribing will shorten them a bit and they'll be prettydarn close to right on as they fit. That "little long" is an amount basedon doing lots of this. It's about a quarterish (?) long generally. You kindof see the part close in on the right length and spot as you scribe it to fit...I have no idea if this helps or not... I've always said a carrier landing is like a free throw in basket ball. Not terriblycomplicated, but try WRITING a description of how to throw a free throw!And in the end, it isn't that complicated, but if you're going to bet yourarse on it, you just gotta be pretty good at it.Does that help?Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Emailing: piet fittings
Pietenpol-List: Re: Emailing: piet fittings
Original Posted By: "Bill Church"
And I just reread what I originally wrote a few times...Gary is EXACTLY right... DO NOT adjust where they hit ANYTHING (you seem to betrying to adjust where they hit the lower fitting) and I seem to say to adjustwhere they hit the fuse. I didn't mean that.The clearer description is, adjust the angles, the end points are VERY fixed. The normal way to do this would be to cut the angles you measure off the plans,then wonder why they don't fit. Use the angles on the plans so you have a piecethat will fit closely enough that you can figure the angle precisely. Isthat better?!!!Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Emailing: piet fittings
And I just reread what I originally wrote a few times...Gary is EXACTLY right... DO NOT adjust where they hit ANYTHING (you seem to betrying to adjust where they hit the lower fitting) and I seem to say to adjustwhere they hit the fuse. I didn't mean that.The clearer description is, adjust the angles, the end points are VERY fixed. The normal way to do this would be to cut the angles you measure off the plans,then wonder why they don't fit. Use the angles on the plans so you have a piecethat will fit closely enough that you can figure the angle precisely. Isthat better?!!!Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Emailing: piet fittings
Pietenpol-List: Re: Wooden strut metal fittings - help
Original Posted By: "Bill Church"
So, Jim, are you saying that your wood isn't coming out right, or is it the metalthat isn't fitting correctly? My guess is that your wood isn't quite right,if you feel the need to bring the tabs of your metal fittings 1 1/2" closertogether. The wood needs to be the correct size at the bottom V, so that theaxle can sit between the front and back legs of the gear without binding. And,as Gary said, the upper ends of the gear legs need to fall at the mounting bracketson the fuselage.Probably the best approach would be to first make sure that your woodwork is theway it is supposed to be, and then, using the plans as a guide, and using somecard stock (rather than aluminum foil - that must be horrible to work with)create templates for the metal fittings. Fit and adjust the card stock templatesas needed until they fit YOUR wood gear properly. At this point, use thosetemplates to cut your metal fittings.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Wooden strut metal fittings - help
So, Jim, are you saying that your wood isn't coming out right, or is it the metalthat isn't fitting correctly? My guess is that your wood isn't quite right,if you feel the need to bring the tabs of your metal fittings 1 1/2" closertogether. The wood needs to be the correct size at the bottom V, so that theaxle can sit between the front and back legs of the gear without binding. And,as Gary said, the upper ends of the gear legs need to fall at the mounting bracketson the fuselage.Probably the best approach would be to first make sure that your woodwork is theway it is supposed to be, and then, using the plans as a guide, and using somecard stock (rather than aluminum foil - that must be horrible to work with)create templates for the metal fittings. Fit and adjust the card stock templatesas needed until they fit YOUR wood gear properly. At this point, use thosetemplates to cut your metal fittings.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Wooden strut metal fittings - help
Original Posted By: "Douwe Blumberg"
Jim (Boyer),Looks like two different questions about metal fittings got posted by two differentJims. I was asking Jim Quinn for photos. Your photos came through fine.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________
Jim (Boyer),Looks like two different questions about metal fittings got posted by two differentJims. I was asking Jim Quinn for photos. Your photos came through fine.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________