Boeing NB

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NB
Boeing NB-1 landplane in flight near NAS Pensacola.jpeg
Boeing NB-1
General information
TypeMilitary trainer
Manufacturer Boeing
Number builtca. 72
History
First flight20 October 1923

The Boeing NB (or Model 21) was a primary training aircraft developed for the United States Navy in 1923. It was a two-bay, equal-span biplane of conventional configuration with interchangeable wheeled and float undercarriage. The pilot and instructor sat in tandem, open cockpits.

Contents

The NBs were produced in two batches; the first (NB-1) were powered by radial engines and the second by war-surplus V-8s still in the Navy's inventory. The original prototype evaluated by the Navy had been assessed as being too easy to fly, and therefore of limited use as a trainer. In particular, it was noted that the aircraft was impossible to spin. The NB-1 design attempted to introduce some instability, but it was soon discovered that while it was now possible to get the aircraft into a spin, it was virtually impossible to recover from one. A series of modifications were made to attempt a compromise.


Variants

An NB-1 floatplane at the National Advisory Committee for Aeronautics, in 1926. Boeing NB-1.jpg
An NB-1 floatplane at the National Advisory Committee for Aeronautics, in 1926.

Operators

Flag of the United States (23px).png  United States
Flag of Peru.svg  Peru

Specifications (NB-1)

3-view line drawing of the Boeing NB Boeing NB 3-view line drawing.png
3-view line drawing of the Boeing NB

General characteristics

Performance

Armament

References