The first production variant powered by a vertically mounted 175hp Franklin 6ALV-335 six-cylinder engine. The enclosed cabin, seating two side-by-side, featured two car-like doors. A total of 78 Model 47Bs (including 47B-3) were produced. Very few Model 47Bs survive today (c/n 11 registered N11HU, 57/N1575, 58/N138B and 70/N150B). In 1989, one exam-ple (c/n 36, N116B), was restored to flying condition by Douglas D. Daigle of Santa Ana, California.

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Technical data for Model 47B

Number of seats: 2, rotor diameter: 10.26m, gross weight: 956kg, empty weight: 626kg, cruising speed: 128km/h, rate of climb: 290m/min, service ceiling: 2960m, range: 320km