Korda Dethermalizer - Wakefield model by Dick Korda, 1941. Korda of course had already won the earlier 1939 Wakefield competition with his previous rubber competition design see Wakefield Winner (oz5395).
Quote: "How do you improve on a Wakefiled Winner? You probably can't. After all, there are many factors besides the model's design that put it on the top. In Korda's case he, by design or luck, launched into one of the only two thermals to come through Bendix Airport New Jersey on August 6th 1939, and his famed model came down 43 minutes and 15 seconds later, wiping out all Wakefield competition on the very first official flight.
This model, which at 300 sq in is slightly larger than its famous predecessor, is also notable in another way. It was among the first to use a new-fangled gadget in competition that brought the model back to earth rather than allow it to fly away. It was nicknamed a 'dethermailzer' and the name has stuck ever since. Lacking a name for this new rubber ship which proved itself at the 1941 Nats, Dick Korda dubbed it the Dethermalizer.
This was before tip up stabs came along. The D/T on Kord's model put the ship in a steep enough spiral to bring it out of a thermal - maybe not the gentlest method, but it worked."
Plans appeared in Feb 1942 Air Trails.
Update 01/02/2019: Added article, thanks to RFJ.
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