Jury Strut Riggin

[Robert Lees]

Re: Jury Strut Riggin

Well you know what I meant!

[Ray36048]

Re: Jury Strut Riggin

Must be that Metric vs ASE thing........

[Hank Jarrett]

Re: Jury Strut Riggin

Hey, if NASA can screw up going from Metric to English, Rob is in good company! (or bad, depending on how you look at it).
I got a huge kick out of his comment "get the Feds to get real". I'm still snickering. Never going to happen. They live in another world. I know. I work with a lot of them.
As for "how many IA's actually really know all the design issues that ensure a Taylorcraft conforms to the type certificate?", GOOD LORD MAN!!! If they knew, and actually FOLLOWED all the rules, NONE of us would be flying! It is the rational decisions of the A&Ps and IAs in the trenches that keep us flying, not the rules from the top made up by folks who have never actually touched a real airplane. Every really GOOD maintenance professional looks to make the plane SAFE first. IF that is by using the rules (as he can find them) great. If not, the good ones use good judgment and try to keep us from killing ourselves. The ones I have worked with do it well. I'm still here!
As for the tape under the jury strut clamps, just remember the PURPOSE of the tape is to keep the clamp from moving around and damaging the strut and doing it without trapping water and corroding the strut or clamp. I pull mine off every once in a while and make sure the paint is in good shape under the clamp and tape. White electrical tape seems to work well, but my plane is hangared all the time.
Great post Rob. Make us think! Stay safe all!
Hank

[Forrest Barber]

Re: Jury Strut Riggin

I do a bit of tongue in cheek once in a while; but believe me if she does not "conform to Type Certificate" you are in a heap of hurt right after the accident. The Tape is available from Jim & Dondi at Polyfiber.,
there were darn few Taylorcrafts at the Fly-In that were "airworthy" hell , two never had the AD done on the tail farings. No bushing , no bolt.

[flyguy]

Re: Jury Strut Riggin

I somehow missed all the discussion after my question a while back and have just caught up--

Forrest, are you saying that white "friction" tape or the white cloth tape is shown somewhere on Taylorcraft drawings to be correct to use under the jury strut clamps?

By the way, if I ever have a crash in my Taylorcraft and the FAA inspects I am sure they will remove me from the wreckage and perform a coup de grace on me, on the spot, without further ado.

Darryl

[paulnuss]

Re: Jury Strut Riggin

Oh the memories this discussion brings back! Like the days our Part 135 operation brought the FSDO inspection team around, the maintenance inspectors looking over the little King-Air F-90 and its paperwork and logs, whilst the other inspectors worked us over with the rest of the 135paperwork and of course the six-month flight checks! Mostly they were good guys, and showed good knowledge, while once in a while one would point out an "i" not dotted.

Anyway, I suppose logic should enter into the discussions. Old-fashioned cloth electrical tape always seemed to me to gather up moisture and make rust anyplace you ever found it on metal. The fabric (cotton?) is porous and sucks up moisture and retains it, it would seem.

I would have a hard time imagining that red vinyl tape, on hardened acrylic enamel paint on wing struts, cushioning enamel-painted jury strut clamps, is going to cause rusting from any reason of chemistry incompatibility. It should also not be hygroscopic, which means "breathing", absorbing moisture as it breathes, and also wicking it in when wet, as is the cloth friction tape. I think the factory would have used vinyl tape if it were available back then, they always seemed to be logical common-sense folks.

As for an FAA accident investigator saying "Oh my! This airplane wasn't airworthy, the Type Certificate wasn't adhered to! Looky here! Vinyl tape under the jury strut clamps! The factory only used cloth friction tape!", well that seems a stretch. I can't imagine any of the modern breed knowing that. The Feds are more likely to find a missing compass calibration card, or something similar...

[Forrest Barber]

Re: Jury Strut Riggin

Jesus guys use your head. It is a "cushion" , soft pliable.... back when they first built the ships, they used what was available think of all the automotive items used on the older ships, THE F-19 built in Alliance used 1 1/2 to 2 1/2 wraps of the white industrial tape it was over the paint which was Laquer and I am sure no amount of moisture could penetrate that stuff. THEN old Kenny would touch the white up with the strut color with a brush to seal the whole thing. If it was done over today I am sure rubber or another tape would be used.
I recall a friend of my Dad's that crashed in an old Bi-Plane( maybe an American Eagle) in the 50's , he had an engine failure, small field , ran out of room tipped her over, walked away looked back , walked back and threw a match onto her, bet he burned his log books too!

[Garry Crookham]

Re: Jury Strut Riggin

I do a bit of tongue in cheek once in a while; but believe me if she does not "conform to Type Certificate" you are in a heap of hurt right after the accident. The Tape is available from Jim & Dondi at Polyfiber.,
there were darn few Taylorcrafts at the Fly-In that were "airworthy" hell , two never had the AD done on the tail farings. No bushing , no bolt.

Might want to review the tail fairing AD since we're starting to get picky....bushing not required unless there is "interference".....and yes, it is good to have one even if there is not interference, but.....


Regulatory Information

50-41-01 TAYLORCRAFT: Applies to All Model B Series Aircraft, Serial Numbers 1001 and Up.

Compliance required not later than November 15, 1950.

Reports have been received of interference between the elevator horn bolt and the fin cover plate apparently caused by improper field installation of the cover plate through bolt. Cases are known where the bolt has worn through the cover plate and such interference may result in jamming of the elevator control system. An inspection of the parts should be made and if evidence of interference is noted, suitable means of preventing the cover plates from interfering with the elevator horn bolt should be incorporated; a spacer bushing at least 1/4 x 0.028 x 1 1/4 inches installed around the cover plate through bolt is considered satisfactory.

Garry Crookham
N5112M
Tulsa

[Forrest Barber]

Re: Jury Strut Riggin

not picky just true , however both of these ships had interference. When the plates go on and off and 100 hr & Annual , The bolt cotter key is usually what does not get placed back correctly, then a slot wears in the plate and whammmm you can't get the wheel back on landing.. New owners need protected.

[Joel Severinghaus]

Re: Jury Strut Riggin

At the risk of stirring this up again, can anyone confirm that back in '46, the factory would have used black cloth friction tape rather than white cloth tape under the jury strut straps?

My restoration first had black cloth friction tape. Then I listened to Forrest, and switched to white cloth tape (1" x 60 yd roll, Aircraft Spruce p/n 09-17100), which frankly looks better with my ivory paint. Then another Taylorcraft authority put doubts in my head at Oshkosh, saying that in '46, everything was black friction tape.

And what did the factory use to prevent cable ends from unraveling, such as back at the rudder turnbuckles, before the invention of heat-shrink plastic tubing? I've heard black friction tape waterproofed with shellac. Can anyone confirm that?

My mechanics referred me to auto parts stores for VersaChem/Lion brand gasket shellac (p/n 52000), which "resists gasoline, motor oil, antifreeze, diesel oil, water and steam." Looks like just the ticket for the 6 wraps of friction tape that lash the oil breather tube to the carb heat duct.

I searched at three different auto parts stores and a farm supply store for the old-fashioned black cloth friction tape, then finally special-ordered some from an electrical supplies store. It's made by Cully, p/n 94320 "friction tape", 3/4" x 60 ft roll. Wonderfully strong sticky stuff, like it's been dipped in tar. Does anyone know of a more convenient aeronautical source for it?

[high time cub]

Re: Jury Strut Riggin

Fast forward to 2008.....

http://www.rescuetape.com/?gclid=CJXd-dzC8pUCFQeWGgodylgReQ

http://www.ertape.com/

[Larry Lyons]

Re: Jury Strut Riggin

I have to add my 2$ worth, inflation you know. 3M makes black electrical tape in 3/4' wide, they also make a chafe/protector tape in 2" up to 6" wide. Same exact stuff, just different width and a little different title but if you look at the small print you will see the same material is used, meets the same mil-spec. etc. We use this stuff all the time to water proof and protect dissimilar metals from electrolysis. Wrapped in a spiral with a 30 to 50% overlap we get total water proof coverage for well over ten years with 100% immersion, sometimes several 100's of feet below the water line. (i.e. a couple hundred psi trying to push the water under or through the tape) So can not say it's use here is OK but I do know it is totally water proof!
Larry