Drag-antidrag wires

[Miguel]

Where in USA i can buy wire for drag/antidrag wires for Talorcraft wings? Too, wish to ask yours if is same wire type used in Piper J-3.-
Many thanks, Happy New Year to all in Taylorcraft Forum and Taylorcraft Organization.-
Miguel.-

[Scott]

Happy New Year to you too Miguel
Aircraft Spruce sell them

https://www.aircraftspruce.com/catalog/appages/wag-taylor-dragwires.php?clickkey=3035668

[Miguel]

Thanks Scott. I was not clear, sorry very much. I know Aircraft Spruce or Wag-Aero sell indivicual wires. But I want buy in bulk,100 or 150 foot of wire, and do not know a source..
Miguel.-

[Scott]

no I don't
the difficult part is making the threads. I believe the threads are rolled BA so you'll need to find a tool to roll the threads. May not be worth it economically, the PMA ones seem reasonably priced to me.

[Robert Lees]

Drag/antidrag wires for the Taylorcraft (and other types) AND streamlined wires for Pitts, Christen Eagles etc are all made in Scotland by Bruntons. It might be worth talking to them directly if you are talking about that quantity, Miguel.

Mind you, they probably get the steel stock from America in the first place!

The drawing calls for "American Hard Wire" (or similar terminology). If the drawing had been a bit more specific with its specification, you may have been able to source such quantities more local to you.

Why do you need so much?

Happy New Year to you too!

Rob

[Robert Lees]

Oh, I forgot.

Scott: the original Taylorcraft drag/antidrag wires were cut threads, not rolled.

Rob

[Mark Bowden]

Hi, Do not cut your own. In addition to raw material requirements there are fatigue requirements as the wing constantly flexes.

As the thread is a 2BA (British Association) it is most likely rolled as Scott stated. The thread design specifies in detail smooth rounded peaks and valleys. It takes a special nut too that matches.

Rolling threads is the generally the cheapest method to make threads! See why in the video link below, no material is removed.

Rolled threads are both stronger and have superior fatigue resistance as they are “forged” not cut.

If you cut threads on a wire size for rolled threads the thread would not be correct in size. Rolling expands the metal on the rod out to the full diameter of the thread. Cutting on that smaller size rod makes threads that are too small.

BA threads were not used much in the USA at all except in early Aircraft manufacture. They are a close tolerance, parallel thread design. The Brits had Whitworth, Fine and Association standards before Metric ISO standards.

Now whether Univar and Wag actually roll the threads that is an open question.

Flat rolling rod example

https://www.youtube.com/watch?v=gRsEDd4R1gc

2-die rolling example

https://www.youtube.com/watch?time_continue=1&v=2o4ZXV1dOIo

[Miguel]

Thanks to all . I thought it was easy to make the threaded ends.
Then I will have to buy the ready made wires, and it will be easier for me to work.
I am rebuilding wings of my BL12-65, and with other friends thinking in rebuild a
set of wings for a brazilian made Paulistinha CAP-4.-
The Paulistinha is a development of the Taylor J-2, and very similar to J-3., with same
airfoil USA 35B.
I learn fly in a Paulistinha, and have more of 100 hours in it, in late 1950 and firsts 1960 years..
Miguel.-