United States Navy
(1) 600hp Pratt & Whitney R-1340-S1H1-G
Primarily used to train test pilots in low speed aircraft handling characteristics, the NU-1B Otter is a single engine, tail dragger (STOL) airplane. An all-metal, high-wing monoplane, the NU-1B is powered by a single engine driving a constant speed propeller.
The aircraft is designed to carry one pilot and up to ten passengers, one of whom may act as a crew member. Dual rudder pedals and dual control wheels allow the aircraft to be flown from either the left or right flight compartment seat.
The NU-1B is the military version of the deHavilland DHC-3 used for many years by commercial industry for feeder operations, forest patrol, and light cargo transport.