Cooper Works 70
Blackjack_1
GP1 BLACKJACK in sit mod.
TECHNICAL DATA WAR DEPARTMENT
No. 9-775 Washington, May 15, 1942
Light Walker GP-1 “BLACKJACK”
Built by Jeff Churill “AKA Cooper Works”
Prepared under the direction of
The chief of ordinance
(With the cooperation of the Cooper Works Company Detroit, MI)
Description
The light GP-1 “Ground Powder” is an armored walker vehicle, designed for scouting and light support. It’s powered by twin 163hp Jeep 4 cylinder supercharged engines, liquid cooled, straight head side valve type engines. The engines are located in two separate nacelles below the main chase, which power two separate LHS (Leg Hydraulic System), one for each leg. The pilot operates the vehicle with two levers, much like a typical tank would operate. The walker is equipment with radio/ interphone, and equipped with a 10-ft periscope. The main chase has 0.5 inch front and side armor.
Crew
A crew of two is position in the main chase, the driver in the forward lower chase, and the commander-spotter - gunner in the upper chase.
Armament
The main chase has 4 side nacelles housing eight .30 caliber machine guns, with 1000 rounds for each gun. Additionally with one pivot mount .30 caliber machine gun for the commander position.
Tabulated Data
General
Weight……………………………………29,950
Width……………………………………..12-ft
Length……………………………….…..18-ft
Height…………………………….……..20-ft
Engines¬
2 Jeep 2.2L Engines (Supercharged)
Rated horsepower………………….163 hp at 2800 rpm
Number of cylinders……………….. 4 cyl, side valves
Weight of engine…………………….510 lb (1020 lb total)
Armament
8 gun, machine, cal. .30, M1919A4 ( chase hard mount)
1 gun, machine, cal. .30, M1919A4 ( upper chase pivot mount)
Armor
0.3 inch front and side armor on the main chase.
Performance
Maximum sustained speed on hard road…..…….40 mph
Cross-country speeds for various terrains…..…..5 to 40 mph
Maximum leap over ditch…………………….………..…15-ft
Maximum step over vertical objects…….………….10-ft
Maximum grade……………………………………………….25-deg
Maximum water depth…………………………………….15-ft
[A. G. 062.11 (5-14-42)
BY ORDER OF THE SECRETARY OF WAR:
G. C. MARSHALL
Chief of Staff.
Official:
J.A. Ulio,
Major General,
The Adjutant General.
Blackjack_1
GP1 BLACKJACK in sit mod.
TECHNICAL DATA WAR DEPARTMENT
No. 9-775 Washington, May 15, 1942
Light Walker GP-1 “BLACKJACK”
Built by Jeff Churill “AKA Cooper Works”
Prepared under the direction of
The chief of ordinance
(With the cooperation of the Cooper Works Company Detroit, MI)
Description
The light GP-1 “Ground Powder” is an armored walker vehicle, designed for scouting and light support. It’s powered by twin 163hp Jeep 4 cylinder supercharged engines, liquid cooled, straight head side valve type engines. The engines are located in two separate nacelles below the main chase, which power two separate LHS (Leg Hydraulic System), one for each leg. The pilot operates the vehicle with two levers, much like a typical tank would operate. The walker is equipment with radio/ interphone, and equipped with a 10-ft periscope. The main chase has 0.5 inch front and side armor.
Crew
A crew of two is position in the main chase, the driver in the forward lower chase, and the commander-spotter - gunner in the upper chase.
Armament
The main chase has 4 side nacelles housing eight .30 caliber machine guns, with 1000 rounds for each gun. Additionally with one pivot mount .30 caliber machine gun for the commander position.
Tabulated Data
General
Weight……………………………………29,950
Width……………………………………..12-ft
Length……………………………….…..18-ft
Height…………………………….……..20-ft
Engines¬
2 Jeep 2.2L Engines (Supercharged)
Rated horsepower………………….163 hp at 2800 rpm
Number of cylinders……………….. 4 cyl, side valves
Weight of engine…………………….510 lb (1020 lb total)
Armament
8 gun, machine, cal. .30, M1919A4 ( chase hard mount)
1 gun, machine, cal. .30, M1919A4 ( upper chase pivot mount)
Armor
0.3 inch front and side armor on the main chase.
Performance
Maximum sustained speed on hard road…..…….40 mph
Cross-country speeds for various terrains…..…..5 to 40 mph
Maximum leap over ditch…………………….………..…15-ft
Maximum step over vertical objects…….………….10-ft
Maximum grade……………………………………………….25-deg
Maximum water depth…………………………………….15-ft
[A. G. 062.11 (5-14-42)
BY ORDER OF THE SECRETARY OF WAR:
G. C. MARSHALL
Chief of Staff.
Official:
J.A. Ulio,
Major General,
The Adjutant General.