Skeleton tank

Skeleton tank
Skeleton Tank preserved at Aberdeen Proving Ground
Type	Experimental Tank
Place of origin	USA
Production history
Manufacturer	Pioneer Tractor Company
Produced	1918
No. built	1
Specifications
Mass	18,000 lb (8,200 kg)
Length	25 ft (7.6 m)
Width	8 ft 5 in (2.57 m)
Height	9 ft 6 in (2.90 m)
Crew	2
Armor	0.5 in (12.7 mm)
Main armament	1 X .30 (7.62 mm) caliber machine gun
Engine	2 X Beaver 4-cylinder 50 hp (37 kW)
Suspension	Rigid frame tracks
Maximum speed	5 mph (8.0 km/h)

The Skeleton tank also known as the Spider tank was an experimental prototype tank built in 1918 by the Pioneer Tractor Company, Winona, Minnesota for $15,000 ($ 303,800 in 2024).^[1][2] The prototype was ready for trials by October 1918.^[3] Designed with several innovative features, some of which were controversial at the time, the Skeleton Tank project did not proceed beyond the single prototype.