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Waterman W-4 Arrowplane
In May 1935 Waterman completed a submission to the government funded Vidal Safety Airplane competition. This was the Arrowplane, sometimes known as the W-4. Built with WPA subsidy established by CAA head, Eugene Vidal (father of author Gore Vidal), this adopted a similar layout to the Whatsit but had a strut-braced high wing on a blunt-nosed, narrow fuselage pod with a tricycle undercarriage mounted under it. Its wings had wooden spars and metal ribs and were fabric covered, with triangular endplate fins carrying upright rudders. Its fuselage was steel framed and aluminium covered. It was powered by a 95 hp (71 kW) inverted inline 4-cylinder Menasco B-4 Pirate pusher engine mounted high in the rear of the fuselage.
First flying on 21 Febuary 1936, the Arrowplane NX/NS13was not intended for production or to be roadable, but its success in the Vidal competition encouraged Waterman to form the Waterman Arrowplane Co. in 1935 for production of a roadable version. The resulting Arrowbile, was referred to by Waterman as the W-5.
The W-4 accumulated more than 100 hours flight time before being intentionally (if not mysteriously) destroyed by a CAA official in 1937.
Engine: Menasco B-4 Pirate, 95 hp / 71 kW
Stall: 40 mph
Landing run: 30 ft
Seats: 2

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