Nakajima G10N

The Nakajima G10N Fugaku (Japanese: 富岳 or 富嶽, "Mount Fuji") was a planned Japanese ultra-long-range heavy bomber designed during World War II. It was conceived as a method for mounting aerial attacks from Japan against industrial targets along the west coast (e.g., San Francisco) and in the Midwest (e.g., Detroit, Milwaukee, Chicago, and Wichita) and the northeast (e.g., New York City and Norfolk) of the United States. Japan's worsening war situation resulted in the project's cancellation in 1944 and no prototype was ever built.^[1]

G10N Fugaku
General information
Type	Ultra-long-range heavy bomber
Manufacturer	Nakajima Aircraft Company
Status	Project (cancelled)
Primary user	Imperial Japanese Navy Air Service
Number built	none

Design and development

See also: Project Z (bomber project)

The Fugaku had its origins in "Project Z (bomber project)", a 1942 Imperial Japanese Army specification for an intercontinental bomber which could take off from the Kuril Islands, bomb the contiguous United States, then continue onward to land in German-occupied France. Once there, it would be refueled and rearmed and make another return sortie.^[1][2][3]

Project Z called for three variations on the airframe: heavy bomber, transport (capable of carrying 300 troops), and a gunship armed with forty downward-firing machine guns in the fuselage for intense ground attacks at the rate of 640 rounds per second (i.e. 38,400 rounds per minute).^[1]

The project was conceived by Nakajima Aircraft Company head Chikuhei Nakajima. The design had straight wings and contra-rotating four-blade propellers. To save weight, some of the landing gear was to be jettisoned after takeoff (being unnecessary on landing with emptied bomb load), as had been planned on some of the more developed German Amerika Bomber competing designs. It used six engines,^[1] as with the later Amerikabomber design competitors, to compensate for nearly all German aircraft engines being limited to 1,500 kW (2,000 hp) maximum output levels apiece.^[4]

Development was initiated in January 1943 and a design and manufacturing facility built in Mitaka, Tokyo. Nakajima's 4-row 36-cylinder 5,000 hp Ha-54 (Ha-505) engine was abandoned as too complex.^{[citation needed]}

Project Z was cancelled in July 1944, and the Fugaku was never built.^[1]

Operators (planned)

 Japan

• Imperial Japanese Navy Air Service – (G10N / Fugaku)
• Imperial Japanese Army Air Force – (Project Z)

Specifications (Project Z / Fugaku projected)

Data from Japanese Secret Projects:Experimental aircraft of the IJA and IJN 1939–1945^[1]

General characteristics

• Crew: 6 to 10^{[lower-alpha 1]}
• Length: 44.98 m (147 ft 7 in) ^{[lower-alpha 2]}
• Wingspan: 64.98 m (213 ft 2 in) ^{[lower-alpha 3]}
• Height: 8.77 m (28 ft 9 in)
• Wing area: 352.01 m² (3,789.0 sq ft) ^{[lower-alpha 4]}
• Aspect ratio: 12.1
• Empty weight: 65,000 kg (143,300 lb) ^{[lower-alpha 5]}
• Gross weight: 122,000 kg (268,964 lb) ^{[lower-alpha 6]}
• Max takeoff weight: 160,000 kg (352,740 lb) ^{[lower-alpha 7]}
• Powerplant: 6 × Nakajima Ha-54 36-cyl. air-cooled radial piston engines, 3,700 kW (5,000 hp) each at take-off^{[lower-alpha 8]}
• Propellers: 6-bladed contra-rotating constant speed propellers, 4.5 m (14 ft 9 in) diameter ^{[lower-alpha 9]}

Performance

• Maximum speed: 679 km/h (422 mph, 367 kn) at 10,000 m (32,808 ft)^{[lower-alpha 10]}
• Range: 17,999 km (11,184 mi, 9,719 nmi) maximum^{[lower-alpha 11]}
• Service ceiling: 15,000 m (49,000 ft)
• Wing loading: 456.99 kg/m² (93.60 lb/sq ft) ^{[lower-alpha 12]}
• Power/mass: 0.103 kW/kg (0.063 hp/lb)^{[lower-alpha 13]}

Armament

• Guns: 4× 20mm Type 99 cannon
• Bombs: 20,000 kg (44,092 lb) of bombs

1. Fugaku: 7 to 8
2. Fugaku: 39.98 m (131 ft)
3. Fugaku: 62.97 m (207 ft)
4. Fugaku: 330 m² (3,552.09 sq ft)
5. Fugaku: 33,800 kg (74,516.24 lb)
6. Fugaku: 42,000 kg (92,594.15 lb)
7. Fugaku: 70,000 kg (154,323.58 lb)
8. Fugaku: 6x Nakajima NK11A 18-cyl. air-cooled radial piston engines developing 2,500 hp (1,864 kW) at take-off
9. Fugaku: 4-bladed constant speed propellers 4.8 m (16 ft) diameter
10. Fugaku: 779 km/h (484 mph) at 10,000 m (32,808 ft)
11. Fugaku: 19,400 km (12,055 mi)
12. Fugaku: 211.89 m² (43.4 lb/ft²
13. Fugaku: 0.118 kW/kg (0.07 hp/lb)

See also

Aircraft of comparable role, configuration, and era

• Amerika Bomber
• Convair B-36
• Focke-Wulf Ta 400
• Heinkel He 277
• Junkers Ju 390
• Messerschmitt Me 264
• Nakajima G8N
• Northrop YB-35
• Victory Bomber

References

Notes

1. Dyer, Edwin M. III (2009). Japanese Secret Projects:Experimental aircraft of the IJA and IJN 1939–1945 (1st ed.). Hinkley: Midland publishing. pp. 108–111. ISBN 978-1-85780-317-4.
2. Francillon 1979, p. 493.
3. Horn 2005, p. 265.
4. Griehl, Manfred; Dressel, Joachim (1998). Heinkel He 177 - 277 - 274. Shrewsbury, UK: Airlife Publishing. p. 188. ISBN 1-85310-364-0.

Bibliography

• Dyer, Edwin M. III (2009). Japanese Secret Projects:Experimental aircraft of the IJA and IJN 1939–1945 (1st ed.). Hinkley: Midland publishing. pp. 108–111. ISBN 978-1-85780-317-4.
• Francillon, René J. (1979). Japanese Aircraft of the Pacific War (2nd ed.). London: Putnam & Company Ltd. ISBN 0-370-30251-6.
• Horn, Steve (2005). The second attack on Pearl Harbor : Operation K and other Japanese attempts to bomb America in World War II. Annapolis, Md: Naval Institute Press. ISBN 978-1-59114-388-8. OCLC 60669052.
• Idei, Tadaaki. Hikōki Mechanism Zukan. Tokyo: Guranpuri Shuppan, 1985.
• Ogawa, Toshihiko. Nihon Kōkūki Daizukan, 1910–1945. Tokyo: Kokushokankōkai, 1993.

External links

• The Nakajima G10N1 Fugaku
• Nakajima G10N "Fugaku" (in Polish)