The Kyushu Q1W Tokai (東海, "Eastern Sea"), was a land-based anti-submarine patrol bomber aircraft developed for the Imperial Japanese Navy in World War II. The Allied code name was Lorna.

The Navy ordered development as the 17-shi in September 1942, and the first test flight took place in September 1943. It entered service in January 1945. The Q1W carried two low-power engines, allowing for long periods of low-speed flight, and was the first purpose-designed anti-submarine warfare aircraft in the world. A total of 143 examples were produced.

Specifications (Q1W1)

General Characteristics

• Crew: three
• Length: 12.09 m (39 ft 8 in)
• Wingspan: 16.00 m (52 ft 6 in)
• Height: 4.12 m (13 ft 6 in)
• Wing area: 38.2 m² (411 ft²)
• Empty: 3,102 kg (6,824 lb)
• Loaded: 4,800 kg (10,560 lb)
• Maximum takeoff: 5,318 kg (11,700 lb)
• Powerplant: 2x Hitachi Amakaze 31 9-cylinder radial engines, 455 kW (610 hp) each

Performance

• Maximum speed: 322 km/h (201 mph)
• Range: 1,342 km (839 miles)
• Service ceiling: 4,490 m (14,727 ft)
• Rate of climb: 229 m/min (751 ft/min)
• Wing loading: 126 kg/m² (26 lb/ft²)
• Power/Mass: 0.19 kW/kg (0.12 hp/lb)

Armament

• 1x flexible rearward-firing 7.7 mm Type 92 machine gun
• 1x or 2x fixed forward-firing 20 mm Type 99 cannon sometimes fitted
• 2x 250 kg (550 lb) bombs or depth charges

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Designation sequence: Q1W - Q2M - Q3W