Gary writes:

Experimental Pliable Moose Shearwater, circa late '74. 38% higher
AR than anything at the time.

There were two folds per side, with the inner fold in the vertical plane only
(not too evident from this shot) and the outer fold in both vertical and
horizontal planes (latter quite evident right wing in photo). The two folds are
defined by the axes of the brown undersurface on either side of the orange
panels in this pic. Making the double surface sail conform cleanly to the
geometry of the planform was a real trick but came out nicely on first try. The
lift distribution was tailored toward a bell shaped curve, similar to the superb
work Al Bowers at NASA has been doing with the Prandtl D Wing. The DT was not so
penalized by the twist distribution of rogallo derivatives with significant
billow, yet it had billow that allowed for very benign parachute type landings.