Brodhead Pietenpol Association

Original Posted By: Ben Charvet

Original Posted By: airlion
You lucky dog. She's a beauty!!--------Mark - working on wingsRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sun, 14 Feb 2010 15:15:40 -0800 (PST)

Original Posted By: "Richard Schreiber"
Ken; check the 2nd picture down the page, here:http://www.flysquirrel.net/piets/CorkyPiet.htmlHowever, I don't have a vacuum gauge so I haveno idea how much it pulls. It does seem to dofine though, driving the vertical speed indicatorand the turn-and-bank.Oscar ZunigaAir Camper NX41CCSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net ________________________________________________________________________________

Original Posted By:> K5YAC
Mark:I think 185# is way too high. My EAA tech counselor told me not to go above40# with the 3/32" cable that I used. I have read that the Bowers Fly Babyplans say to tighten as tight as you can by using your fingers, then go onemore turn. In my case that worked about to about 35-40#. Sound wise, thecables don't ping and are not tight enough to really produce a note. Theyare just tight enough too feel secure.Regards,Rick SchreiberValparaiso, IN> [Original Message]

Original Posted By: "Michael McGowan"
I'll be darn... really? I am using 1/8" 7x19 cable... anyone else think I'm overtightening? If so, can anyone else offer their techniques or suggestions?I know I just read about this stuff not too long ago.--------Mark - working on wingsRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: "K5YAC"
According to AC43-13 3/32 cable has a minimum breaking strength of 920 pounds. 1/8 inch 7 X 19 has a strength of either 1760 lbs or 2000 lbs. I was taught in A+P school to use the twanging method. If the cables are too slack they will deform and not provide the structural stability they installed for. Mike McGowan----- Original Message -----

Original Posted By: K5YAC
185 lbs is way, way too high. Most aircraft flight control cables are in the 25-35 lb range. You are going to deform something for certain, and break something possibly. for a cable that is a stay, hand tight is more than enough. There is certainly no reason to go to any particular tension.Gene ----- Original Message -----

Original Posted By: "Clif Dawson"
You guys must have hands like the son of Jor-El (Superman). I am a fairly largeand reasonably strong young whipper snapper, but hand tightening leaves my 1/8"cables sagging slightly. I certainly wouldn't think this is correct. I would think they should be taut, but I have yet to read anything that indicatesproper tension other than the twang method. When I tension enough to resonateat an audible level (more particularly, a G note), the tensiometer reads 180-190.I checked the tension after each adjustment. Hand tight read near tozero pounds (still a bit slack). Even when I got around 40 pounds, I would considerthem a bit loose. I think I would prefer that my drag/anti-drag cablesbe at least taught.--------Mark - working on wingsRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: Ryan Mueller
If everything was made of steel 185 might be reasonablebut I certainly don't want to subject my wood stab andrudder to that kind of force.If I could just find a few G notes somewhere, I'd be ahappy man.So that tensionometers mother doesn't happen to befree tonight does she?By the way, which G are we talking about? Everyoctave has a G you know.Clif"There are many tunes still to be written in the Key of C."Arnold Schoenberg> Mark:> I think 185# is way too high. My EAA tech counselor told me not to go > above> 40# with the 3/32" cable that I used. I have read that the Bowers Fly Baby> plans say to tighten as tight as you can by using your fingers, then go > one> more turn. In my case that worked about to about 35-40#. Sound wise, the> cables don't ping and are not tight enough to really produce a note. They> are just tight enough too feel secure.>> Regards,> Rick Schreiber> Valparaiso, IN________________________________________________________________________________Date: Sun, 14 Feb 2010 21:01:37 -0600Subject: Re: Pietenpol-List: Re: Cable Tensiometer and G Note

Original Posted By: "K5YAC"
Right Clif... I am listening for the first audible G, so the lowest one. I wish I knew more about the other tensiometer... sorry I can't help ya out. [quote="CDAWSON5854(at)shaw.ca"]If everything was made of steel 185 might be reasonablebut I certainly don't want to subject my wood stab andrudder to that kind of force.If I could just find a few G notes somewhere, I'd be ahappy man.So that tensionometers mother doesn't happen to befree tonight does she?By the way, which G are we talking about? Everyoctave has a G you know.Clif--------Mark - working on wingsRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Cable Tensiometer and G Note

Original Posted By: Dave and Connie
Thanks Ryan, that is some of the stuff I read a few weeks ago, but I'm pretty surethere was other stuff about a G note. Perhaps I made that part up in my head.Ha ha! I guess I could go back and adjust my turnbuckles down a bit. I guess I'll justlisten for an equal resonating tone all around. Sure wish I knew what a reasonable"pounds" indication would be.--------Mark - working on wingsRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Sun, 14 Feb 2010 22:36:56 -0500

Original Posted By: "Clif Dawson"
I think you guys may be thinking more along the lines of G-string as opposed toG note.By the way, in the long run that pictured tensiometer will cost you a lot morethan your airplane ever will. [Rolling Eyes]Read this topic online here:http://forums.matronics.com/viewtopic.p ... __________

Original Posted By: santiago morete
Hahaha! Now what could possibly bring you to thatconclusion. :-)Tensionometer? How about this one?Clif>> I think you guys may be thinking more along the lines of G-string as > opposed to G note.>> By the way, in the long run that pictured tensiometer will cost you a lot > more than your airplane ever will. [Rolling Eyes]________________________________________________________________________________Date: Mon, 15 Feb 2010 03:43:49 -0800 (PST)

Original Posted By: H RULE
Gene asked->vertical speed run off of a venturi??????????No, sorry; my goof. The tensiometer is theother instrument that runs off the venturi inNX41CC ;o)Oscar ZunigaAir Camper NX41CCSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net ________________________________________________________________________________Date: Mon, 15 Feb 2010 06:16:29 -0800 (PST)

Original Posted By: "Gene Rambo"
Here are two that are in common use for sailboats. And before you get to thinking that marine use can't be as precision, etc., as aircraft, take it from me: they are, these days.http://www.apsltd.com/p-5732-standard-t ... -532.aspxI use the less expensive one on my sailboat. The company has been a reliable supplier for years. Other than as a customer, I have no relationship with them.David Paule________________________________________________________________________________

Original Posted By: Dave and Connie
No, I know what he is talking about. If anything, control cables need to be tighter than the drag/anti drag cables which I correctly referred to as "stays". As someone else said on here, they only need to hold the wings in position, not hold them together.Gene ----- Original Message -----

Original Posted By: H RULE
Wow, really? Why even have them at all? > "If anything, control cables need to be tighter than the drag/anti drag cableswhich I correctly referred to as "stays"."> > Gene> --------Mark - working on wingsRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Mon, 15 Feb 2010 10:45:04 -0800 (PST)

Original Posted By: Isablcorky(at)aol.com
Subject: Re: Pietenpol-List: Re: Cable Tensiometer and G Note The stays are there to move the fore and aft loads to the root of the wing. To make them tight just adds load to the compression struts. When justlong enough they add no load on the compression strut. When load is added fore or aft, the load moves thru the stay to the next compression strut. The compression strut would be more likely to crush if it is already pre-loaded . The wing cannot bow if as soon as it starts to load the wires gotight. That's assuming the wires don't stretch. Howdy ________________________________________________________________________________

Original Posted By: "Gene & Tammy"
Subject: Re: Pietenpol-List: Cable Tensiometer and G NoteBeing a half/a?? musician I tuned the drags to F# and the Anti drags to Bb in order to enjoy a pleasant musical chord while flying 41CC.________________________________________________________________________________

Original Posted By: Isablcorky(at)aol.com
Corky, what'd you do, leave the after-game party early?Gene in snowy Tennessee ----- Original Message -----

Original Posted By: "Don Emch"
Mark,It my understanding that they keep the wing from "bending" fore and aft, spanwise. That's why they are often referred to as "drag/anti- drag" wires. There are ways around using them, but they're simple, effective, light weight and more importantly, traditional.Wayne Bressler Jr.Taildraggers, Inc.taildraggersinc.comOn Feb 15, 2010, at 1:00 PM, "K5YAC" wrote:>> Wow, really? Why even have them at all?>>>> "If anything, control cables need to be tighter than the drag/anti >> drag cables which I correctly referred to as "stays".">>>> Gene>>>>> --------> Mark - working on wings>>> Read this topic online here:>> http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Cable Tensiometer and G Note

Original Posted By: "K5YAC"
> Subject: Pietenpol-List: Cable Tensiometer and G Note>>> If you are easily offended, turn back now!>> I recently installed and applied tension to my drag/anti drag cables. Afew weeks ago, there was some discussion on the matter and several peoplesaid to tighten them to a note of G. I thought they were joking at first,but as more people concurred, I realized they were serious. So, I recordeda G note from my PC on to my phone and took it to the hangar. Once Itightened a cable to this tone, I stopped and used a tensiometer to checkthe tension. It registered ~185 pounds. Having never done this, I wasn'tsure if that was reasonable or not... again, just using the G noteapproach. >> To confirm, I called my friendly A&P and asked him about the G notemethod as well as the 185 pound reading. He said that the G note is a goodrule of thumb and that 180 - 190 pounds isn't unreasonable either. He saidthat the cables on his Fokker's landing gear are in that range. >> So, having said all this, what do you guys think? I've got all 4 cablesin the left wing panel adjusted, but not safety wired. Before I proceed,would anyone have any concerns with my readings? Too tight? Not tightenough? >> I will say this... the tensiometer is very repeatable, but a fellow canchase his tail all day trying to get each cable exactly the same. Mine areall within a few pounds of each other, which I believe is good enough.>> Speaking of chasing tail... I think I will use this method the next timeI need to check cables (see photo). Not overly scientific, but certainly alot easier on the senses.>> --------> Mark - working on wings>>> Read this topic online here:>> http://forums.matronics.com/viewtopic.p ... 425#286425>>> Attachments: >> http://forums.matronics.com//files/rig_ ... ___Subject: Pietenpol-List: Re: Cable Tensiometer and G Note