Yokosuka D4Y

Specifications

1st Flight 1940

Crew: 2

Length: 10.22 m (33 ft 6 in)

Wingspan: 11.5 m (37 ft 9 in)

Height: 3.74 m (12 ft 3 in)

Wing area: 23.6 m2 (254 sq ft)

Empty weight: 2,440 kg (5,379 lb)

Gross weight: 4,250 kg (9,370 lb)

Powerplant: 1 × Aichi Atsuta AE1P 32 V-12 inverted liquid-cooled piston engine, 1,000 kW (1,400 hp)

Performance

Maximum speed: 550 km/h (340 mph, 300 kn)

Range: 1,465 km (910 mi, 791 nmi)

Service ceiling: 10,700 m (35,100 ft)

Rate of climb: 14 m/s (2,800 ft/min)

Wing loading: 180 kg/m2 (37 lb/sq ft)

Power/mass: 025 kW/kg (15 hp/lb)

Armament

Guns:

2× forward-firing 7.7 mm Type 97 aircraft machine guns

1× rearward-firing 7.92 mm Type 1 machine gun

Bombs:

500 kg (1,100 lb) of bombs (design)

800 kg (1,800 lb) of bombs (suicide attacker)

Variants

D4Y1 Experimental Type 13 carrier dive-bomber – 5 prototypes were produced. #3 and #4 were rebuilt to reconnaissance plane and carried on aircraft carrier Sōryū.

D4Y1-C Type 2 reconnaissance aircraft Model 11 – Reconnaissance version produced at Aichi’s Nagoya factory. Developed on 7 July 1942.

D4Y1 Suisei Model 11 – First batch of serial produced dive bomber aircraft. Powered by 895 kW (1,200 hp) Aichi AE1A Atsuta 12 engine. Developed in December 1943.

D4Y1 KAI Suisei Model 21 – D4Y1 with catapult equipment for battleship Ise and Hyūga. Developed on 17 March 1944.

D4Y2 Suisei Model 12 – 1,044 kW (1,400 hp) Aichi AE1P Atsuta 32 engine adopted. Developed in October 1944.

D4Y2a Suisei Model 12A – D4Y2 with the rear cockpit 13 mm (.51 in) machine gun. Developed in November 1944.

D4Y2a KAI Suisei Model 22A – D4Y2a with catapult equipment for battleship Ise and Hyūga.

D4Y2-S Suisei Model 12E – Night fighter version of the D4Y2 with bomb equipment removed and a 20 mm upward-firing cannon installed.

D4Y2 KAI Suisei Model 22 – D4Y2 with catapult equipment for battleship Ise and Hyūga.

D4Y2-R Type 2 reconnaissance aircraft Model 12 – Reconnaissance version of the D4Y2. Developed in October 1944.

D4Y2a-R Type 2 reconnaissance aircraft Model 12A – D4Y2-R with the rear cockpit 13 mm (.51 in) machine gun.

D4Y3 Suisei Model 33 – Land-based bomber variant. 1,163 kW (1,560 hp) Mitsubishi Kinsei 62 radial engine adopted.

Removed tailhook also.

D4Y3a Suisei Model 33A – D4Y3 with the rear cockpit 13 mm (.51 in) machine gun.

D4Y3 Suisei Model 33 night-fighter variant – Temporary rebuilt night-fighter version.

Two planes were converted from D4Y3.

Equipment a 20 mm upward-firing cannon installed.

This was not naval regulation equipment.

Development code D4Y3-S (or Suisei Model 33E) was not discovered in the IJN official documents.

D4Y4 Suisei Model 43 – Final production variant. Bomb load increased to 800 kg (1,760 lb) with the main bomb semi-recessed in the bomb bay.

It had 75 mm bullet-proof glass in front of the canopy, plus 5mm and 9mm thick armour plates fore and aft of the cockpit.

The fuel tanks were also given added protection, and the movable rear machine gun was removed.

The addition of five RATO boosters was considered: three in the lower-bottom part of the fuselage and two on both sides below the engine. Generally, the D4Y4 is often recognized as being purpose-built for special attack operations.

D4Y5 Suisei Model 54 – Planned version with Nakajima Homare radial engine, four-blade propeller, and more armor protection.

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