RD-1 published in 1991. Bob Hunt post copied below.
Re: RD1 CL Craftsman build
« Reply #21 on: December 23, 2014, 02:38:34 PM »
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Hi Rich:
Yes, I designed the Prowler as well as the RD-1. The RD-1 came first by a couple of years. Actually, I think the RD-1 is the better flyer of the two designs, and is (in the interest of full disclosure) essentially just a restyled, foam wing equipped Twister.
I still make foam cores, sheeted foam wings, Lost-Foam fixture sets, and fully built Lost-Foam built-up wings for both designs.
Later - Bob