Airfoil used on NASA Helios?

[dalbert02]

I was wondering if anyone knew what airfoil was used on the NASA Helios. I have been searching for hours and came up with nothing. Perhaps a better question is, how could I learn what the best airfoil would be for high altitude low speed flight? Thank you for any assistance.
-dave

[Ralph Walton]

I'm curious on the airfoil too. I believe they used APC props, but Ive been curious to know what motors etc were used. Anyone got a spec sheet or knows where to get one?

[dalbert02]

I remember reading that the props were 'laminar flow' but I am unsure who manufactured them. I assumed Aerovironment, but now that you say APC, I don't know. :( The motors were rated at 1.5kw, but I also do not know who made them.
-dave