| Australian Cruiser Tank Mk. 4 | |
|---|---|
![[An AC4 tank illustration.]](view_image.php?q=AC4_tank&sq=Albert Einstein&lang=en&file=File:AustralianCruiserTankMkIV.jpg) A 1943 artist's illustration of the AC MkIV tank based on the production drawings | |
| Type | Cruiser tank |
| Place of origin | Australia |
| Production history | |
| Designed | 1943 |
| Manufacturer | New South Wales Government Railways |
| Specifications | |
| Mass | 30 long tons (30.5 t)[1] |
| Length | 21 feet 6 inches (6.55 m) (Maximum)[2] |
| Width | 9 feet (2.74 m) (Maximum)[2] |
| Height | 9 feet (2.74 m) (Maximum)[2] |
| Crew | 4 (Commander, Gunner, Loader/Operator, Driver)[2] |
| Armour | Hull front 2.5 inches (64 mm) sides and rear 1.75 inches (44 mm) Turret 2.5 inches (64 mm) all round[2] |
Main armament | 17 pounder with 50-60 rounds,[2] or 25 pounder tank gun |
Secondary armament | one .303 (7.7 mm) Vickers machine gun, 2,500-4000 rounds[2] |
| Engine | Perrier-Cadillac 397 horsepower (296 kW)[1] |
| Power/weight | 13.2 hp/ton |
| Suspension | Horizontal Volute Spring |
Operational range | 150 miles (240 km)[2] |
| Maximum speed | 30 miles per hour (48 km/h)[2] |
The AC4 (Australian Cruiser Tank Mk. 4) was a cruiser tank designed in Australia in World War II as the intended successor to the AC3 Thunderbolt. Like its predecessors the AC4 was to have a one piece cast hull and turret. The AC4's most important characteristic would be the use of a 17 pounder tank gun.