Arne,

At a 70% increase in cost and 82% increase in weight I can get 1" OD x .125" wall.

I have been looking here and here. I hope to make a stock 12' length work for all battens except the top sheeted batten. For the 'long' batten I would buy a single 20' or 24' length and cut it down.

Maybe the 6061-T6 0.840" OD x 0.109" ID (OD 21.336mm x wall 2.7686mm) T312 is a better option. Smaller OD but thicker wall?

To keep my project going I will need to make a decision on battens. I have come full circle and now I am thinking alloy battens again.

Arne was kind enough to suggest that I look for 25mm OD and 21mm ID AL alloy (25x2mm).

Considering the price and weight I would like to use 6061-T6 with a 1" OD and a wall thickness of 0.065". If I did the math right this works out to a 25.4mm OD and 22.1mm ID. This is a slightly larger OD but with thinner wall compared to what Arne suggested.

I think this is the same size used on 'Brenda B'. The listed displacement I found for my S2 6.7 is 2200lbs and the Com-Pac 19 is 2000lbs. Pretty close. But on the other hand my battens will be longer than the ones that 'Brenda B' carries.

Does anyone have reason to expect 6061-T6 with a 1" OD and a wall thickness of 0.065" is not strong enough for my rig?

Panels Seven, Six, Five and Four stitched together. Is the luff straight enough? I don't worry. I'm happy.

More photos in my album here.

Whether it is good enough or not, depends on who is judging it. All I can say it that I could not make it better than that.

So keep up the good work!

Arne

OK! Thank you both for the very quick responses.