Martin wire

[Hank Jarrett]

Re: Martin wire

Tape over the lacing won't stop the lacing from rubbing the rib. The instructions need to say to put tape over the RIB, BEFORE the covering, so the tape covers the edge of the rib. If you are going to use the tape for anti chaff protection it also needs to be pushed around the sharp edge.
If the instructions just say to put tape over the stitches that doesn't fix the problem. As said before, I have never used stitching on a stamped rib so I haven't read those instructions. Can you post them for the rest of us?

Hank

[flylo]

Re: Martin wire

I've never seen stitching done without using anti-chafe tape so I may have failed to mention that so we probably do agree. Would be nice to find someone to make the real Taylorcraft wire.

[Scott]

Re: Martin wire

AC 43 13-1a
Page 2-11 paragraph d

.... " Care must be taken to insure that all sharp edges against which the lacing cord may bear are protected by tape in order to prevent abrasion of the cord."

[N96337]

Re: Martin wire

John,[COLOR="#FF0000"]You also admit to not having read any STC's and I'd assume AC43.13, as you know nothing about installing anti chafe tape o
Like I said, I'm not going to argue on this, but a couple of corrections to your statements. From a SAFETY stand point covering the sharp edge would work fine, I never said it wouldn't. Rolling the edge under so it doesn't contact the rib edge would work fine too. That is from a SAFETY standpoint. If it was a home built I would have no problem doing either one. From a LEGAL standpoint no one has yet posted a document from the FAA APPROVING doing this. I have been sent copies of letters REQUESTING a deviation. I have been sent FAA documents (STCs) for rivets and screws, but nothing that confirm the FAA APPROVES stitching a Taylorcraft stamped rib. I have a letter from Dorthy saying you can substitute stamped ribs for stick and stick for stamped but is says NOTHING about using one fastening method on the other.
Hank, go read a couple of the previous posts. There is a letter from the Denver ACO stating that it's a go, then there is a 337 that has been field approved. Tim also stated that he's gotten it field approved. My field approval for a Champ as well as my Tcart is following as soon as they're back from our FSDO. So don't give me that stuff!!

I am really happy for you that you have only seen a hand full of cut stitches (which to me confirms my position any way) but the wing I stripped the covering from was FULL of them. I will stand by my decision, if only for me. I won't fly a stamped rib plane with rib stitches. You make your decision based on your risk tolerance, I have made mine. If you had stick ribs with cut cords I would be digging further to find out why. Rodents chewing? No tape over the rib edge? Bad cords? I'm all ears. I fly a 41 with stick ribs and rib stitches. I am restoring a 45 with stamped ribs. All info is good for me and I respect your knowledge....sometimes I am just more risk averse than even my own IA.They were installed with no anti chafe tape and I'd say were cut when they were installed. Not only that, but they weren't tight. I replaced them and they flew out the remainder of the fabric life (cotton, so it was borderline anyway).
As a plus, it is the method used by the factory and no one YET has provided a document showing stitching is approved for Taylorcraft stamped ribs. A letter requesting deviation doesn't cut it. Where is the APPROVAL. Like I said, read previous posts, and YES, a letter from the ACO is approved data.

Hank

You also stated that you haven't read the STC's and I'm assuming AC43.13 either, since you don't know about it stating that anti chafe tape is installed on the rib. I'd say you need to bone up on that before you argue too much, as it's in plain sight. You're arguing with personal opinions and not the facts.

[Robert Lees]

Re: Martin wire

Patience and a kind temperance are crucial to good relationships here; let's keep it civil please everyone.

[flylo]

Re: Martin wire

I think this poor old dead horse has been beaten way too much & I really don't think beating it anymore is going to change anyone's mind anyway so lets just leave it dead in peace.

[Robert Lees]

Re: Martin wire

Agreed