Yokosuka P1Y

Specifications

1st Flight 1943

Crew: 3

Length: 15 m (49 ft 3 in)

Wingspan: 20 m (65 ft 7 in)

Height: 4.3 m (14 ft 1 in)

Wing area: 55 m2 (590 sq ft)

Empty weight: 7,265 kg (16,017 lb)

Gross weight: 10,500 kg (23,149 lb)

Max takeoff weight: 13,500 kg (29,762 lb)

Powerplant: 2 × Nakajima NK9C Homare 12 18-cylinder air-cooled radial piston engines, 1,361 kW (1,825 hp) each for take-off

Performance

Maximum speed: 547 km/h (340 mph, 295 kn) at 5,900 m (19,357 ft)

Cruise speed: 370 km/h (230 mph, 200 kn) at 4,000 m (13,123 ft)

Range: 5,370 km (3,340 mi, 2,900 nmi)

Service ceiling: 9,400 m (30,800 ft)

Wing loading: 191 kg/m2 (39 lb/sq ft)

Power/mass: 0.20 kW/kg (0.12 hp/lb)

Armament

Guns:

1× flexible, nose-mounted 20 mm (0.787 in) Type 99 cannon

1× flexible rear-firing 13 mm (0.512 in) Type 2 machine gun

Bombs:

up to 1,000 kg (2,205 lb) of bombs or 1× 800 kg (1,764 lb) torpedo

Variants

P1Y1 Experimental Type 15 land-based bomber – 3 of prototypes and 9 of supplementary prototypes with 1,357 kW (1,820 hp) NK9C Nakajima NK9B Homare 11 engines.

Prototype #3 was later used for Ishikawajima Tsu-11 testbed.

P1Y1 Ginga (“Milky Way”) Model 11 – First model of the series. Mounted Homare 11 or Homare 12.

P1Y1a Ginga Model 11A – Mounted Homare 12, and fitted 1 × 13 mm (.51 in) Type 2 machine gun in the back defensive position.

P1Y1b Provisional name Ginga Model 11B – Converted from P1Y1a, mounted Homare 12, and fitted 2 × 13 mm (.51 in) Type 2 machine guns in the back defensive position.

P1Y1c Provisional name Ginga Model 11C – Converted from P1Y1b, mounted Homare 12, and fitted 1 × 13 mm (.51 in) Type 2 machine gun in the forward position, prototype only.

P1Y1 Ginga Model 11 Night-fighter variant  – Converted from P1Y1.

Armed with 2 × 20 mm Type 99 cannons. Equipped 302nd Kōkūtai only.

This is not naval regulation equipment.

P1Y1-S Provisional name Ginga Model 21 – Night fighter variant. Armed with 4 × 20 mm Type 99 cannons firing obliquely forward, and 1 × 13 mm (.51 in) Type 2 machine gun in the back defensive position.

Only a project.

P1Y1 Ground attack variant – converted from P1Y1/P1Y1a, installed up to 20 × 20 mm Type 99 cannons in the bomb bay for land strikes against B-29 bases in the Marianas.

Approx. 30 rebuilt.

P1Y2-S Provisional name Ginga Model 26/Test production Kyokkō (“Aurora”) – Night fighter variant.

Initial named Hakkō in October 1943, renamed Kyokkō in March 1944. Converted from P1Y1/P1Y1a.

Fitted Mitsubishi MK4T-A Kasei 25 engines.

Armed with 2 × 20 mm Type 99 cannons and 1 × 30 mm Type 5 cannon.

Later, almost all were converted to P1Y2. 96 or 97 produced.

P1Y2 Provisional name Ginga Model 16 – Land based bomber. Converted from P1Y2-S. Mounted 1,380 kW (1,850 hp) Mitsubishi MK4T-A Kasei 25 Kō engines.

P1Y2a Provisional name Ginga Model 16A – Converted from P1Y1a.

Mounted Mitsubishi MK4T-A Kasei 25 Kō engines.

P1Y2b Provisional name Ginga Model 16B – Converted from P1Y1b. Mounted Mitsubishi MK4T-A Kasei 25 Kō engines.

P1Y2c Provisional name Ginga Model 16C – Converted from P1Y1c.

Mounted Mitsubishi MK4T-A Kasei 25 Kō engines.

P1Y2 Ginga Model 16 Night-fighter variant – Converted from P1Y2.

Armed with 2 × 20 mm Type 99 machine guns or 1 × 30 mm Type 5 cannon.

Equipped 302nd Kōkūtai only. This is not Naval regulation equipment.

P1Y3 Provisional name Ginga Model 13 – Converted from P1Y1.

Mounted Homare 21 engines.

P1Y4 Provisional name Ginga Model 12 – Converted from P1Y1.

Mounted Homare 23 engines.

P1Y5 Provisional name Ginga Model 14 – Converted from P1Y1.

Mounted Mitsubishi Ha-43 engines.

P1Y6 Provisional name Ginga Model 17 – Converted from P1Y2.

Mounted Mitsubishi MK4T-C Kasei 25 Hei engines.

Provisional name Ginga Model 33, Kashō Ginga 33-gata) – Long-range bomber variant.

Crew: 4, bombs= up to 3,000 kg. Only a project.

Test production Tenga, Shisei Tenga) – Proposed jet-powered bomber variant, mounted Ishikawajima Ne-30.

Discontinued in 1945.

MXY10 Yokosuka Navy Bomber Ginga – Ground decoy non-flying replica of Yokosuka P1Y1.

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