Mitsubishi G4M

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Mitsubishi G4M

Mitsubishi G4M

Allied Code Name: "Betty"

Mitsubishi G4M

(Scanned from René J. Francillion "Japanese Aircraft of the Pacific War" - Putnam - 1979)

UNITS ALLOCATED

1st, 4th, 702nd, 705th, 706th, 721st, 722nd, 751st, 752nd, 753rd, 755th, 761st, 762nd, 763rd, 765th, 951st, 1021st, Chitose, Genzan, Kanoya, Kisarazu, Misawa, Takao and Yokosuka Kokutais.

G4M Lateral View

(Scanned from Ray Bonds' "An Illustrated Guide to Bombers of World War II" - Salamander Books - 1980)

G4M Lateral View

(Scanned from "Máquinas de Guerra" - Editora Globo - 1986)

TECHNICAL DATA

Description: Twin-engined land-based bomber (G4M), heavy escort fighter (G6M1), bomber crew trainer (G6M1-K) or transport (G6M1-L2). All-metal construction with fabric-covered control surfaces.

Accommodation: (G4M) Normal crew of seven. (G6M1) Crew of ten.

Powerplant:

Two 1,530 hp Mitsubishi MK4A Kasei 11 fourteen-cylinder air-cooled radials rated at 1,530 hp for take-off, 1,410 hp at 2000 m and 1,340 hp at 4,000 m, driving three-blade metal propellers (12-Shi prototypes, G4M1 Model 11 and G6M1).
Two Mitsubishi MK4E Kasei 15 fourteen-cylinder air-cooled radials rated at 1,530 hp for take-off, 1,400 hp at 2,600 m and 1,280 hp at 6,000 m, driving three-blade metal propellers (G4M1 Model 12).
Two Mitsubishi MK4P Kasei 21 fourteen-cylinder air-cooled radials rated at 1,800 hp for take-off, 1,575 hp at 1,800 m and 1,410 hp at 4,800 m, driving four-blade metal propellers (G4M2 Model 22, 22A and 22B).
Two Mitsubishi MK4T Kasei 25 fourteen-cylinder air-cooled radials rated at 1,825 hp for take-off, 1,680 hp at 2,100 m and 1,540 hp at 5,500 m, driving four-blade metal propellers (G4M2a Model 24, 24A and 24B, G4M2e Model 24J, G4M3 Model 34 and G4M3a Model 34A).
Two Mitsubishi MK4T-B Kasei 25b fourteen-cylinder air-cooled radials rated at 1,825 hp for take-off, driving four-blade metal propellers (G4M2d Model 27).
Two Mitsubishi MK4T-B Ru Kasei 25b Ru fourteen-cylinder air-cooled radials rated at 1,825 hp for take-off and 1,500 hp at 7,200 m, driving four-blade metal propellers (G4M2c Model 26 and G4M3 Model 36).
Two Mitsubishi MK4V Kasei 27 fourteen-cylinder air-cooled radials rated at 1,795 hp for take-off, 1,670 hp at 2,600 m and 1,480 hp at 6,580 m, driving four-blade metal propellers (G4M2b Model 25).

Armament:

	Nose	Dorsal blister	Dorsal turret	Beam blisters / beam hatches	Tail turret	Ventral Gondola Forward-firing	Ventral Gondola Rear-firing
12-Shi prototypes G4M1 Model 11 G4M1 Model 12	7.7 mm x 1 Type 92	7.7 mm x 1 Type 92	-	7.7 mm x 2 Type 92	20 mm x 1 Type 99 Model 1	-	-
G4M2 Model 22 G4M2a Model 24 G4M2b Model 25 G4M2d Model 27 G4M3 Model 34	7.7 mm x 2 Type 92	-	20 mm x 1 Type 99 Model 1	7.7 mm x 2 Type 92	20 mm x 1 Type 99 Model 1	-	-
G4M2 Model 22A G4M2a Model 24A G4M3a Model 34A	7.7 mm x 2 Type 92	-	20 mm x 1 Type 99 Model 1	20 mm x 2 Type 99 Model 1	20 mm x 1 Type 99 Model 1	-	-
G4M2 Model 22B G4M2a Model 24B G4M2e Model 24J G4M2c Model 26 G4M3 Model 36	7.7 mm x 2 Type 92	-	20 mm x 1 Type 99 Model 2	20 mm x 2 Type 99 Model 2	20 mm x 1 Type 99 Model 2	-	-
G4M2a Model 24C	13 mm x 1 Type 2 7.7 mm x 1 Type 92	-	20 mm x 1 Type 99 Model 2	20 mm x 2 Type 99 Model 2	20 mm x 1 Type 99 Model 2	-	-
G6M1	7.7 mm x 1 Type 92	-	-	20 mm x 1 Type 99 Model 1	20 mm x 1 Type 99 Model 1	20 mm x 1 Type 99 Model 1	20 mm x 1 Type 99 Model 1

Bomb-load:

One 800 kg torpedo or similar load of bombs (G4M1).
One 800 kg torpedo or up to 1,000 kg of bombs (G4M2 and G4M3).
One Navy Special Attacker Ohka Model 11 (G4M2e).
None (G6M1).

	G4M1 Model 11	G4M2 Model 22	G4M3 Model 34	G6M1
Dimensions:
Span	25.00 m	25.00 m	25.00 m	25.00 m
Length	20.00 m	20.00 m	19.50 m	20.00 m
Height	6.00 m	6.00 m	6.00 m	6.00 m
Wing area	78.1 m²	78.1 m²	78.1 m²	78.1 m²
Weights:
Empty	6,800 kg	8,160 kg	8,350 kg	7,000 kg
Loaded	9,500 kg	12,500 kg	12,500 kg	9,500 kg
Wing loading	121.6 kg/m²	160.0 kg/m²	160.0 kg/m²	121.6 kg/m²
Power loading	3.1 kg/hp	3.5 kg/hp	3.4 kg/hp	3.1 kg/hp
Performance:
Maximum speed	231 kt at 4,200 m	236 kt at 4,600 m	254 kt at 5,150 m	-
Cruising speed	170 kt at 3,000 m	170 kt at 4,000 m	170 kt at 4,000 m	-
Climb to	7,000 m	8,000 m	7,000 m	-
in	18 min	30 min 24 sec	20 min 10 sec	-
Service ceiling	-	8,950 m	9,220 m	-
Maximum range	3,256 naut miles	3,270 naut miles	2,340 naut miles	-

Production: A total of 2,446 G4Ms and G6M1s were built by Mitsubishi Jukogyo K.K. as follows:

2 12-Shi prototypes (Nagoya plant Sept 1939 and Feb 1940)
30 G6M1 (Nagoya plant 1940)
1,200 G4M1 (Nagoya plant Jan 1941-Jan 1944)
1,154 G4M2 (Nagoya plant 640 aircraft and Okayama plant 514 aircraft Nov 1942-Aug 1945)
60 G4M3 (Nagoya and Okayama plants Dec 1943-Aug 1945)

G4M3 three-view drawing

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