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Ho-1 was a Japanese autocannon used during World War II, it was a Type 97 20 mm anti-tank rifle adapted for use in bomber turrets.[1]
| Ho-1 cannon | |
|---|---|
 A Type 97 20 mm anti-tank rifle, the base for the Ho-1 cannon. | |
| Type | Aircraft autocannon |
| Place of origin | Empire of Japan |
| Service history | |
| Used by | Imperial Japanese Army Air Service Imperial Japanese Navy Air Service |
| Wars | World War II |
| Specifications | |
| Mass | 34 kg (75 lb) |
| Length | 1,749 mm (68.9 in) |
| Barrel length | 1,194 mm (47.0 in) |
| Cartridge | 20x125mm (127) |
| Calibre | 20 mm (0.79 in) |
| Action | Short recoil-operated |
| Rate of fire | 300-400 rounds/min |
| Muzzle velocity | 820 m/s (2,700 ft/s) |
| Feed system | 15-round box magazine |
The cannon when fixed was known as the Ho-3,[2] compared to its flexible brother the Ho-3 was fed with a 50-round double drum, while the Ho-1 was fed by a 15-round magazine.[1]
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