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
Yes. If you want a tailless delta that's efficient it wants to look something like a Horton or early Northrop, not a flexwing microlight.
That said, internal structural cleverness and use of fairings and simplified shapes certainly has potential to remove a lot of the easily identifiable profile drag generators in the way of cables, struts, pilots, etc... The best such at the moment is probably the P&M PulsR?...
https://www.youtube.com/watch?v=1RbDVS-0XTE
Which if nothing else, is very clever, and very pretty. Designed by the aforementioned Bill Brooks.
G