Kemp (Grey Eagle) I-4 or D-4, In-line 4 Engine

Due to its simple design and quantity production, this air-cooled engine sells for approximately one half the price of its water-cooled competitors, and is lighter, more streamlined, and trouble-free than most of them.

The early models such as this one, had concentric valves which permit a large valve area, but is a complicated design. Later models are equipped with conventional valves. All of the 2-, 4-, and 6-cylinder models have automatic intake valves.

Gift of Mrs. L. L. Walker Houston, TX.

Physical Description:
Weight: 82.2 kg (181 lb)

Country of Origin
United States of America

Manufacturer
Kemp Machine Works (Muncie, Indiana)

Date
1911-1912

Location
National Air and Space Museum, Washington, DC
Exhibition
Early Flight

Type
PROPULSION-Reciprocating & Rotary

Materials
Metal
Dimensions
Length 76 cm (30 in.), 46 cm Height (18 in.), Width 30 cm (12 in.) (Approximate)

Due to its simple design and quantity production, this air-cooled engine sells for approximately one half the price of its water-cooled competitors, and is lighter, more streamlined, and trouble-free than most of them.

The early models such as this one, had concentric valves which permit a large valve area, but is a complicated design. Later models are equipped with conventional valves. All of the 2-, 4-, and 6-cylinder models have automatic intake valves.

Gift of Mrs. L. L. Walker Houston, TX.

Physical Description:
Weight: 82.2 kg (181 lb)

Country of Origin
United States of America

Manufacturer
Kemp Machine Works (Muncie, Indiana)

Date
1911-1912

Location
National Air and Space Museum, Washington, DC
Exhibition
Early Flight

Type
PROPULSION-Reciprocating & Rotary

Materials
Metal
Dimensions
Length 76 cm (30 in.), 46 cm Height (18 in.), Width 30 cm (12 in.) (Approximate)

ID: A19660012000