Some additional motifivation:
Watch for the sharp gouge stops:
and
and
Arp today wrote: In John Dickenson's letter to Rogallo on 24th November 1964, he writes "…when I saw a picture of the Ryan research aircraft, which was illustrated in the booklet you sent me, I then endeveoured to adapt this wing shape to lift a water skier…"
The booklet can be found here :- http://www.dtic.mil/cgi-bin/GetTRDoc?Lo ... =AD0408772 see page 208.
There even exists a version featuring rubber roll-up wings familiar from the Goodyear Rubber plane of the 1950’s. Of course, in that case, transition from running to flying will become a reality, that is if you don’t get caught in the pusher-type aft mounted prop.
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