From: "Doug Shepherd" Subject: COZY: pedal/brake master cylinder assembly Date: Sun, 27 Feb 2000 16:17:35 -0800 Did anybody else feel like the plans brake master cylinder linkage was pretty cheesy? I ordered some oil-impregnated flange bushings from Wicks and was MUCH happier with the way it felt when I put them in. Also, because I inadvertently drilled the pedal holes in the NG-30's 5/8" instead of 1/2", I used some more oil-impregnated bronze bushings (got these from Grainger) to make them the correct size. I'm glad I did. The pedals are nearly frictionless now -- they spring right back against the fairly weak brake cylinder return springs -- and yet they're very solid. I'll have complete confidence standing on them as hard as I need to. It cost me about $30 all told and no more than 3-4 ounces worth of bronze. A question: I'm not sure what geometry to shoot for. The left-side pedals are ~2" forward of F22 when the brake cylinders start to engage, which eyeballs about right, but I don't have any real reason to think that's correct. I realize the brake cylinder extensions provide some adjustment, but I'd like to get it near a 'typical' position with the adjusters in the center position so I'll be able to adjust to both sides of normal for both tall and short pilots (I'm pretty average myself -- 5' 10" to be exact). Doug Shepherd From: cdenk@ix.netcom.com Date: Sun, 27 Feb 2000 19:34:22 -0500 (EST) Subject: Re: COZY: pedal/brake master cylinder assembly With 750 hours on the plans brake pedal pivots, I have no issues with the setup. I do, though have horizontal master cylinders per the Cosy Classic drawings. It may seem lile small weight, but ounces make pounds, and its a little here and a little there that make a heavy airframe. For height adjustment, I have several sets of holes for the pedals, and the dead end of the master cylinders, and within an hour could make some adjustments. From: "John Slade" Subject: COZY: Chap 13 - rudder pedal NG30 bearings Date: Thu, 27 Apr 2000 13:21:55 -0400 Its me again. Doesn't anyone else have any questions these days? I got my rudder pedals from Dennis Oelmann - beautiful work. I expected steel, maybe powder coated. What I got was top quality white enamel finished parts. I'll have to work hard to beat that finish on the outside of the plane. Anyway - I'm puzzled about how the pedals are supported where they pass through the NG30s. Plans don't show (or talk about) any kind of support or bearing that I can find. Just a hole in the NG30 with the steel rod rotating on the glass. This doesn't sound right. Either I'm missing something, or a modification / enhancement is in order. Marc's site talks about "oilite bearings". Can someone give me a suggestion (or a Wicks part number) for the bearings I need here? Also, I'm doing the Matco lay-down cylinders. Plans say to put both the master cylinders on the left side. Marc's pictures show one either side in the middle which looks like a good place. I don't think the pedals will twist enough to make this a problem. Thoughts anyone? Regards, John Slade, Cozy MKIV #757, progress: http://kgarden.com/cozy West Palm Beach, FL Date: Thu, 27 Apr 2000 16:08:38 -0500 From: Mike Pollock Subject: RE: COZY: Chap 13 - rudder pedal NG30 bearings Just my two cents worth. As I built the NG30s, I added two glass pads to the NG30s where the rudder pedal tubing passes through just like the ones used to support the nose gear mechanism. I used graphite to lubricate them. I probably have used the rudders making engine noises, etc. more than I will over a 5 year period:) No wear yet! -- Michael.Pollock@wcom.com Flying Velocity 173RG N173DT Building Cozy MKIV #643 -----Original Message----- From: owner-cozy_builders@betaweb.com [mailto:owner-cozy_builders@betaweb.com]On Behalf Of Tom Brusehaver Sent: Thursday, April 27, 2000 1:36 PM Cc: Cozy builders Subject: Re: COZY: Chap 13 - rudder pedal NG30 bearings > Anyway - I'm puzzled about how the pedals are supported where they pass > through the NG30s. Plans don't show (or talk about) any kind of support or > bearing that I can find. Just a hole in the NG30 with the steel rod rotating > on the glass. This doesn't sound right. Either I'm missing something, or a > modification / enhancement is in order. Marc's site talks about "oilite > bearings". Can someone give me a suggestion (or a Wicks part number) for > the bearings I need here? I ordered Oilite bearings for the rudder pedals, they are listed in the Wicks catalog. The bearings showed up in a bag with some hinges I ordered for the front access panels. I was surprised how heavy that bag was, considering what was in side it. I decided not to use them, a little weight here and there, and suddenly we are talking about a heavy airplane. My thoughts. The holes in NG-30 seem fine. From: cdenk@ix.netcom.com Date: Thu, 27 Apr 2000 16:59:44 -0400 (EDT) Subject: Re: COZY: Chap 13 - rudder pedal NG30 bearings Well with 800 hours, and I'm not light on the brakes, I don't see any significant wear, just built per the drawings in the bearing area. I do have lay down cylinders per the Cosy Classic drawings, and that arrangement will result in lower thrusts on the bearing area. From: "Paul Stowitts" Subject: RE: COZY: Chap 13 - rudder pedal NG30 bearings Date: Thu, 27 Apr 2000 15:47:18 -0700 I used the bushings on my pedals and kept both cylinders on the pilot's side. I wanted both pedals to have the same feel by having the brake linkage connected directly to the cylinders. I felt there was too much "give" in the pedal linkage for my tastes. One problem you may have in using the bushings is that the finish on the pedals may make the diameter too large to fit inside the bushings. I had this problem when a friend chromed my pedals. I had to remove the chrome from the section that went through the bushing but it worked out OK. The bushings were listed under "Bushings - Flange" in the 1997 Wicks catalog but I don't remember the exact one I used. Paul Stowitts Cozy Mark IV #200 -----Original Message----- From: owner-cozy_builders@betaweb.com [mailto:owner-cozy_builders@betaweb.com]On Behalf Of John Slade Sent: Thursday, April 27, 2000 10:22 AM To: Cozy builders Subject: COZY: Chap 13 - rudder pedal NG30 bearings Its me again. Doesn't anyone else have any questions these days? I got my rudder pedals from Dennis Oelmann - beautiful work. I expected steel, maybe powder coated. What I got was top quality white enamel finished parts. I'll have to work hard to beat that finish on the outside of the plane. Anyway - I'm puzzled about how the pedals are supported where they pass through the NG30s. Plans don't show (or talk about) any kind of support or bearing that I can find. Just a hole in the NG30 with the steel rod rotating on the glass. This doesn't sound right. Either I'm missing something, or a modification / enhancement is in order. Marc's site talks about "oilite bearings". Can someone give me a suggestion (or a Wicks part number) for the bearings I need here? Also, I'm doing the Matco lay-down cylinders. Plans say to put both the master cylinders on the left side. Marc's pictures show one either side in the middle which looks like a good place. I don't think the pedals will twist enough to make this a problem. Thoughts anyone? Regards, John Slade, Cozy MKIV #757, progress: http://kgarden.com/cozy West Palm Beach, FL From: "John Slade" Subject: COZY: Re: Chap 13 - rudder pedal NG30 bearings Date: Fri, 28 Apr 2000 00:29:05 -0400 I got lots of replies to my question. There doesn't seem to be much consensus here. Some say its just fine running on the glass, others made bearings out of delrin, teflon, phenolic or bought 3/4 oillite bushings from Wicks. I did mine with phenolic. As for the position of the lay down master cylinders, some (including Nat) say they should both be on the pilot's side so they "feel" the same. Most seem to put them both in the middle next to the NG30's. Dennis's pedals seem to be made to go that way because of where the fittings are, and I think they're more robust than the original Brock pedals. Mine are going in the middle. Thanks to all for the quick input. I'll be back. John Slade, Cozy MKIV #757, progress: http://kgarden.com/cozy West Palm Beach, FL From: "Eric Westland" Subject: COZY: Re: Re: Chap 13 - rudder pedal NG30 bearings Date: Fri, 28 Apr 2000 07:17:43 -0700 > > As for the position of the lay down master cylinders, some (including Nat) > say they should both be on the pilot's side so they "feel" the same. Most > seem to put them both in the middle next to the NG30's. Dennis's pedals > seem to be made to go that way because of where the fittings are, and I > think they're more robust than the original Brock pedals. Mine are going in > the middle. > I put both master cylinders on the pilots side per Jim White's plans. They are in one of the older newsletters, it's basically the lay down cylinders. I'm glad they are both on "my side", but for a reason I did not expect. I'm 5'8", so my legs don't stick too far into the nose anyway, but for my longer-legged friends, it's nice to be able to remove the foot pegs and not have any master cylinders in their way. Eric Westland