treadigraph,
I'm with you on the Vulcan, a delta as opposed to a true flying wing.
However, Ghengis, most modern flexwing hang-gliders are definately more flying wing than delta.
The early 1st and 2nd generation machines based on the Rogallo steerable parachute were good delta examples but the 5th and 6th gen modern flexwings appear much closer to a YB49 design. Including the tendancy to tumble!!!
And if I can work out how to post a photo I will.
