Designer:

Seth Hart  Search this

Materials:

Overall: Doped fabric, Paint, Laminated wood, Steel, Brass, Solder, Aluminum alloy

Hub: Steel

Blades: Fabric-covered Birch

Dimensions:

3-D (Propeller): 269.2 × 30.5 × 27.9cm, 48.5kg (8 ft. 10 in. × 1 ft. × 11 in., 107lb.)

Storage (Aluminum Pallet): 314.3 × 121.9 × 124.5cm, 284kg (10 ft. 3 3/4 in. × 4 ft. × 4 ft. 1 in., 626lb.)

Type:

PROPULSION-Propellers & Impellers

Country of Origin:

United States of America

Date:

1920

Physical Description:

Type: Two-Blade, Variable-Pitch, Wood and Metal

Engine Application: 112 kw (150 horsepower) Hispano Suiza engine

Summary:

The first variable-pitch propeller developed in the United States was invented by Seth Hart and Robert I. Eustis of Los Angeles, California, and demonstrated in 1917. Possibly the second variable-pitch propeller in the United States, this 1920 controllable and reversible propeller is the product of the first government sponsored variable-pitch propeller development program. It was completed following a two year development at the Engineering Division, McCook Field, Dayton, Ohio, and is an improved version of a design submitted to the Army for evaluation in 1918 by Hart and Eustis. This propeller had a faulty blade retention system, and was unable to keep wooden or Micarta blades connected to the hub.

Credit Line:

Gift of United States War Department, Air Corps Material Division

Inventory Number:

A19340025000

Restrictions & Rights:

Usage conditions apply

See more items in:

National Air and Space Museum Collection

Data Source:

National Air and Space Museum

GUID:

http://n2t.net/ark:/65665/nv9548f1676-391e-43ed-a910-331a69c22ab3

EDAN-URL:

edanmdm:nasm_A19340025000