AC1 Sentinel | ||
|---|---|---|
| Land | Australia | |
| Type | Cruiser tank | |
| Produsert | 1942-1943 | |
| Bygget | 65 | |
Den AC1 Sentinel was a cruiser tank designed in Australia in World War II in response to the war in Europe, and to the threat of Japan expanding the war to the Pacific or even a feared Japanese invasion of Australia.
Kilde: Wikipedia
| AC1 Sentinel – Walk Around | |
|---|---|
| Fotograf | Unknow |
| Lokalisering | Unknow |
| Bilder | 76 |
| AC1 Sentinel – Walk Around | |
|---|---|
| Fotograf | Darren Baker |
| Lokalisering | Unknow |
| Bilder | 28 |
Les også:
The **Australian Cruiser Tank Mark 1 (AC1)**, officially named the **Sentinel**, was the first tank designed and built in Australia during World War II. Developed in response to the threat of Japanese expansion and the urgent need for armored vehicles in the early 1940s, it aimed to be a domestically produced, modern cruiser tank.
Key Design and Engineering
The Sentinel incorporated a number of unique and innovative design features, especially considering Australia’s limited experience in tank production:
- Cast Construction: The AC1 was one of the first tanks in the world to feature a **hull cast as a single piece**, a technique also applied to the turret. This simplified construction, provided excellent ballistic shape, and reduced the need for extensive welding.
- Armament (Initial): The primary weapon was the **Ordnance QF 2-pounder (40 mm) gun**. Secondary armament consisted of two **.303 Vickers machine guns** (one coaxial and one in the hull front).
- Unique Propulsion: Due to the lack of locally available high-power radial engines, the AC1 was powered by a bespoke arrangement of **three Cadillac V8 petrol car engines**. These engines were arranged in a unique “clover-leaf” configuration, feeding power to a single common gearbox to achieve the required horsepower.
Specifications (AC1 Sentinel)
- type: Cruiser Tank
- Mass: Approximately 28 tons
- Mannskap: 5 (Commander, Gunner, Loader/Operator, Driver, Hull Machine Gunner)
- Maximum Speed: 30 mph (48 km/h)
- Max Armour: Approximately 65 mm on the hull front and turret
Service History and Legacy
The Sentinel was produced by the New South Wales Railway Company’s Chullora Tank Assembly Shops, with **65 production vehicles** completed between 1942 and 1943. However, the tank never saw combat service. By the time the AC1 was ready for deployment, the immediate threat to Australia had receded, and the Australian Army began receiving sufficient numbers of more powerful British and American tanks (such as the M3 Grant and M4 Sherman).
The program was terminated in mid-1943. The completed Sentinels were subsequently used for **training and evaluation** purposes only. Despite its limited use, the AC program demonstrated Australia’s capacity for indigenous heavy industrial design and production under wartime pressure. Furthermore, the design was successfully tested for an upgrade to the powerful **QF 25-pounder** gun (in the AC3 Thunderbolt prototype), proving the cast hull design had significant upgrade potential.
You can see a brief overview of the tank in this video: [Quick History – AC 1 Sentinel Cruiser Tank](https://m.youtube.com/shorts/GhQ-1mw90wc). This short video provides a quick history and design summary of the AC1 Sentinel cruiser tank.
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