Original Posted By: John Franklin
Erkki from France & Group.=C2-=C2- Here is the article written by Barry Davis (thanks Barry !) =C2-about the Big Piets that appeared in the May 2009 issue of EAA=99s =C2-Sport Aviation magazine.=C2-=C2- I hope you find it helpful Erkki and to others who may not have read about this wonderfulundertaking by a great=C2- EAA Chapter from Georgia.=C2-=C2- =C2-I was able to speak with Barry at Brodhead and see some of these Big Piets up close and they are really a neat idea and well-thought out if you want a slightly bigger version of a Pietenpol.=C2-=C2- The Big Piet Group used Corvair engines for power but I believe that a Continental 0-200 100 hp engine would also be an excellent choice for the larger airplane. =C2-Mike C.=C2-=C2-=C2- Ohio =C2-=C2-=C2-=C2-=C2-=0A=0A=0A ________________________________________________________________________________Date: Tue, 12 Apr 2011 07:03:21 -0500 (GMT-05:00)
Pietenpol-List: help identifying disk brake caliper
Pietenpol-List: help identifying disk brake caliper
Original Posted By: jorge lizarraga
Folks - this may seem like a newbe question - and it probably is - but I need someassistance from those more experienced. First some background: I purchased a GN-1 (vintage 1986 build) last year that camewith 15-6.00x6 tires/wheels. Right brake was always a little spongy - I bledit several times and it helped temporarily. At the end of the season I noticedbrake fluid starting to show up on the side of my tire. Pulled it off andfound the fluid was leaking between brake cylinder and the piston - meaning theo-ring seal. When I looked closer - I also noticed that the casting has a smallsplit where the brake bleeder was overtightened at some point. Basically,I need to replace the assembly. Problem - this looks like a Matco assembly - but there is no identification thatI can find on the assembly. The piston is 1.5" dia. Axle it was mounted on is1.25" dia. The brake rotor on the wheels isn't the tophat kind like what itappears that Cleveland uses - but a ring style with three cap screws to attachto the wheel. Anybody have a clue what this is? I 'd like to replace somewhat in kind so themaster cylinder pressure matches and I don't have different braking loads on eachside of the plane.Attached are pics for reference. Help?FYI- intending to fly to Brodhead this year - then to Oshkosh with the group.--------Lorin MillerWaiex N81YXGN-1 N30PPRead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/cyli ... ______Date: Mon, 11 Apr 2011 22:21:37 -0700 (PDT)
Folks - this may seem like a newbe question - and it probably is - but I need someassistance from those more experienced. First some background: I purchased a GN-1 (vintage 1986 build) last year that camewith 15-6.00x6 tires/wheels. Right brake was always a little spongy - I bledit several times and it helped temporarily. At the end of the season I noticedbrake fluid starting to show up on the side of my tire. Pulled it off andfound the fluid was leaking between brake cylinder and the piston - meaning theo-ring seal. When I looked closer - I also noticed that the casting has a smallsplit where the brake bleeder was overtightened at some point. Basically,I need to replace the assembly. Problem - this looks like a Matco assembly - but there is no identification thatI can find on the assembly. The piston is 1.5" dia. Axle it was mounted on is1.25" dia. The brake rotor on the wheels isn't the tophat kind like what itappears that Cleveland uses - but a ring style with three cap screws to attachto the wheel. Anybody have a clue what this is? I 'd like to replace somewhat in kind so themaster cylinder pressure matches and I don't have different braking loads on eachside of the plane.Attached are pics for reference. Help?FYI- intending to fly to Brodhead this year - then to Oshkosh with the group.--------Lorin MillerWaiex N81YXGN-1 N30PPRead this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/cyli ... ______Date: Mon, 11 Apr 2011 22:21:37 -0700 (PDT)
Pietenpol-List: Re: help identifying disk brake caliper
Original Posted By: "ldmill"
Jake,You can't have tight grain spacing on the sides AND the bottom. That would meanthat the grain was sloped at 45 degrees. You want the tight grain spacing onthe sides of the spars, not the bottom. The photo of Rick's spars shows it theway it is supposed to be. You can see a little of the end grain, which showsthe growth rings to be quite horizontal (vertical grain, or quarter sawn). Inan IDEAL spar, there would be NO grain lines on the bottom or top - only on thesides, and the end grain would be perfectly horizontal (when the spar is upright).But some variation is acceptable, since wood is a natural substance, anddoesn't always grow according to specifications.sounds like your spars are fine.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: help identifying disk brake caliper
Jake,You can't have tight grain spacing on the sides AND the bottom. That would meanthat the grain was sloped at 45 degrees. You want the tight grain spacing onthe sides of the spars, not the bottom. The photo of Rick's spars shows it theway it is supposed to be. You can see a little of the end grain, which showsthe growth rings to be quite horizontal (vertical grain, or quarter sawn). Inan IDEAL spar, there would be NO grain lines on the bottom or top - only on thesides, and the end grain would be perfectly horizontal (when the spar is upright).But some variation is acceptable, since wood is a natural substance, anddoesn't always grow according to specifications.sounds like your spars are fine.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: help identifying disk brake caliper
Re: Pietenpol-List: Re: Speaking of Wing Sweep and CG
Original Posted By: Rick Holland
Took John's advice and contacted Matco. Very impressed with their customer service.They had an email back to me in 2 hours identifying this as an old Matcoversion that the back side had been machined flat for some reason. They also identifiedthe replacement parts needed and the alternate entire assembly - whichI chose. $82 for the whole caliper assembly - I"ll take it.Item of note - I had a senior moment for some reason - these are standard 6.00x6wheels/tires - not 15-6.00x6...Thanks all !--------Lorin MillerWaiex N81YXGN-1 N30PPRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Wed, 13 Apr 2011 18:37:28 -0600Subject: Re: Pietenpol-List: Re: Speaking of Wing Sweep and CG
Took John's advice and contacted Matco. Very impressed with their customer service.They had an email back to me in 2 hours identifying this as an old Matcoversion that the back side had been machined flat for some reason. They also identifiedthe replacement parts needed and the alternate entire assembly - whichI chose. $82 for the whole caliper assembly - I"ll take it.Item of note - I had a senior moment for some reason - these are standard 6.00x6wheels/tires - not 15-6.00x6...Thanks all !--------Lorin MillerWaiex N81YXGN-1 N30PPRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Wed, 13 Apr 2011 18:37:28 -0600Subject: Re: Pietenpol-List: Re: Speaking of Wing Sweep and CG