Originally Posted by
PDR1
Look at the two in terms of draggy bits - the P&M has lots of external bracing, sticky-out wheels, open cockpit etc etc. All that makes for a marked relictance to slip thropugh fluids like a well-buttered eel.
PDR
...and we all admire the fluids properties of the well buttered eel.
I take your point but the frontal area is low, if somewhat cluttered. The key to the Rogallo wing would be its coefficient of drag.