Wing trammeling and drag wire

[jse18]

I have made a lot of progress on my fuselage and I am now stating o look at the wing covering. But before I have to do one last step on drag wires "tightening".

Did some one have an idea to tighten the drag wire a the proper "force" ?

What "charge" should I use ?

Thanks
Best Regards
Pierre

[courierguy]

The A&E who signed off my Taylorcraft wing build checked by the sound they made. You want the same tone when strummed from all of them. So, all the same, that's obvious, how tight I won't try and explain, other then take all the play out, but not too tight. Snug, no play or sag, would maybe be the proper descriptive terms.

[tcraft128]

16-18lbs at 1/2" deflection in the middle of the wire.

[jse18]

Thanks !
Great !

[bob turner]

Not in the manual, but I stretch a string along the front spar, then trammel the bays. I found that just trammelling might not guarantee a dead-straight spar, even though mathematically it ought to.

[Hardtailjohn]

That's the way I was taught too, Bob. One of my old mentors used to say, "strings don't lie". I lay a string (usually orange or black thread) on front and rear spars... keep it in the middle of the spar and it's plenty "true".