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Mitsubishi Ki-21 Sally , Century Wings , Corgi Aviation and Hobbymaster New Model Arrivals !

23/09/2020 By Richard Darling

Mitsubishi Ki-21 Sally

The Mitsubishi Ki-21 ( “Type 97 Heavy Bomber”) (Allied reporting name: “Sally” /”Gwen”) was a Japanese heavy bomber during World War II. It began operations during the Second Sino-Japanese War participating in the Nomonhan Incident, and in the first stages of the Pacific War, including the Malayan, Burmese, Dutch East Indies and New Guinea Campaigns. It was also used to attack targets as far-flung as western China, India and northern Australia.

Design and development

In 1936, Imperial Japanese Army Air Service issued a requirement for a new heavy bomber to replace both the Ki-20 (Army Type 92 Heavy Bomber) and the Ki-1 (Army Type 93 Heavy Bomber). The design called for a crew of at least four, top speed of 400 km/h (250 mph), endurance of at least five hours, and a bombload of 750 kg (1,650 lb). The design parameters were very ambitious, and few twin-engine bombers anywhere in the world could exceed such performance at that time.

Both Mitsubishi and Nakajima were asked to build two prototypes each, a further proposal from Kawasaki being rejected. The Mitsubishi design was an all-metal mid-wing cantilever monoplane with retractable landing gear, ventral bomb bay and two radial engines. The first prototype flew on 18th December 1936, with the second prototype, which differed in replacing the dorsal turret of the first prototype with a long greenhouse canopy, following later in the month.

Mitsubishi Ki-21 Type 97 “Sally”

In the resulting competition Mitsubishi’s Ki-21 and Nakajima’s Ki-19 were found to be similar, with the Ki-21 having better performance while the Nakajima design was a better bombing platform and had more reliable engines. In order to make a final decision, two further prototype were ordered from both Mitsubishi and Nakajima, with Mitsubishi instructed to change its own 615 kW (825 hp) Mitsubishi Ha-6 radial engines for the Nakajima Ha-5 engines used by the Nakajima design and vice versa, while the Ki-21 gained a revised glazed nose similar to that of the Ki-19 and revised tail surfaces. Thus modified, the Ki-21 proved superior, and was ordered into production as the “Army Type 97 Heavy Bomber Model 1A”, being ordered into production in November 1937.

Production aircraft began to enter service in August 1938, supplementing and then replacing the Fiat BR.20 bombers which had been purchased as an interim measure.

Several improved versions followed before the production of the type ended in September 1944. A total of 2,064 aircraft were built, 1,713 by Mitsubishi and 351 by Nakajima.

Mitsubishi Ki-21 Type 97 “Sally”

Operational history

The Ki-21-Ia was used in combat in the war with China by the 60th Sentai from autumn 1938, carrying out long-range unescorted bombing missions in conjunction with the BR.20 equipped 12th and 98th Sentais. The Ki-21 proved to be more successful than the BR.20, having a longer range and being more robust and reliable. Two more Sentais, the 58th and 61st deployed to Manchuria in the summer of 1939 for operations against China, with aircraft from the 61st also being heavily used against Russian and Mongolian Forces during the Nomonhan Incident in June–July 1939.

Losses were high during early combat operations, with weaknesses including a lack of armament and self-sealing fuel tanks, while the aircraft’s oxygen system also proved unreliable. The Ki-21-Ib was an improved version designed to address the armament issue by increasing the number of 7.7 mm (.303 in) Type 89 machine guns to five, and incorporating improvements to the horizontal tail surfaces and trailing edge flaps. In addition, the bomb bay was enlarged. The tail gun was a ‘stinger’ installation, and was remotely controlled. Also, the fuel tanks were partially protected with laminated rubber sheets.

Mitsubishi Ki 21 I Sally Hamamatsu Army Flying School 02

This was followed in production by the Ki-21-Ic with provision for a 500 L (130 US gal) auxiliary fuel tank, fitted in the rear weapons-bay and one more 7.7 mm (.303 in) machine gun, bringing the total to six. Four 50 kg (110 lb) bombs were carried externally. To offset the increase in weight the main wheels of the Ki-21-IC were increased in size.

However, by the attack on Pearl Harbor and the start of the Pacific War, improvements in the ROC Air Force caused losses to mount, and most Ki-21-1a, -1b and -1c were relegated to training or second-line duties.

Front line units from mid-1940 were equipped with the Ki-21-IIa (“Army Type 97 Heavy Bomber Model 2A”) with the more powerful 1,118 kW (1,500 hp) Mitsubishi Ha-101 air-cooled engines and larger horizontal tail surfaces. This became the main version operated by most IJAAF heavy bomber squadrons at the beginning of the Pacific War, and played a major role in many early campaigns. For operations over the Philippines the JAAF’s 5th, 14th and 62nd Air Groups, based in Taiwan, attacked American targets at Aparri, Tuguegarao, Vigan and other targets in Luzon on 8 December 1941. The 3rd, 12th, 60th and 98th Air Groups, based in French Indochina, struck British and Australian targets in Thailand and Malaya, bombing Alor Star, Sungai Petani and Butterworth under escort by Nakajima Ki-27 and Ki-43 fighters. However, starting from operations over Burma in December 1941 and early 1942, the Ki-21 began to suffer heavy casualties from Curtiss P-40s and Hawker Hurricanes.

Mitsubishi Ki-21 ‘Sally’ being armed

To partially compensate, the IJAAF introduced the Ki-21-IIb, with a pedal-operated upper turret with one 12.7 mm (0.50 in) Type 1 machine gun, redesigned cockpit canopies and increased fuel capacity. Although used in all fronts in the Pacific theater, it became clear by 1942 that the design was rapidly becoming obsolete, and was increasingly shifted away from front-line service.

In spite of its shortcomings, the Ki-21 remained in service until the end of the war, being utilized as transport (along with the civil transport version MC-21), bomber crew and paratrooper trainer, for liaison and communications, special commando and secret missions, and kamikaze operations.

Nine Ki-21-Ia/b’s were sold by Japan to Thailand in 1940 for use by the Royal Thai Air Force against Vichy French forces in French Indochina but did not participate in the French-Thai War as its crews had not completed training.

Towards the end of the war, remaining Ki-21s were used by Giretsu Special Forces in strikes against American forces in Okinawa and the Ryūkyū Islands. One of the noted operations was an attack on the Allied-held Yontan airfield and Kadena airfield on the night of 24th May 1945. Twelve Ki-21-IIb’s of the Daisan Dokuritsu Hikōtai were dispatched for a strike, each with 14 commandos. Five managed to crash-land on the Yontan airfield. Only one plane landed successfully. The surviving raiders, armed with submachine guns and explosives, then wrought havoc on the supplies and nearby aircraft, destroyed 264,979 L (70,000 gal) of fuel and nine aircraft, and damaged 26 more. A number of Ki-21-Ia were modified to serve as military transports for use by Greater Japan Airways, which was under contract by the Japanese Army in China for transportation. Designated “MC-21”, these aircraft had all armament and military equipment removed. Used primarily as cargo transports, each could also seat nine paratroopers. Aircraft built from the start as transports were given the separate designation of Mitsubishi Ki-57, with equivalent civil aircraft being designated MC-20.

Code Names

The Ki-21 had more than one Allied codename. Initially called “Jane”, the name was quickly changed to “Sally” when General Douglas MacArthur objected that the name was the same as that of his wife. When the Ki-21-IIb entered service, the absence of the long dorsal “greenhouse” led Allied observers to mistake it for a completely new type, which was designated “Gwen”. However, when it was realized that “Gwen” was a new version of the Ki-21, it was renamed “Sally 3”, with “Sally 1” referring to the earlier Ha-5 powered models, and “Sally 2” referring to the Ha-101 powered Ki-21-IIa.

Ki-21 of the Daisan Dokuritsu Hikōtai at Yontan Airfield, 25th May 1945


 

Mitsubishi Ki-21 Sally available to order from Flying Tigers.

Please click on the image below to check out the Mitsubishi Ki-21 Sally available to buy from Flying Tigers.

MAGJJ19 Ex Magazine 1/144th scale Mitsubishi Ki-21 Sally RRP £30.00  Flying Tigers only £14.99

 


Corgi Aviation Archive new model arrivals at Flying Tigers!

The following model have arrived today and are available to order from Flying Tigers. Limited remaining stock availability… please click on the image or link below to order your now.

AA33622 Corgi Aviation Archive 1/72nd scale Panavia Tornado GR.1 ZA591/FN, RAF No.16 Squadron, 75th Anniversary Scheme  RRP £80.00  Flying Tigers only £71.99


 

Century Wings new model arrival at Flying Tigers!

The following models have arrived today and are available to order from Flying Tigers. Limited remaining stock availability… please click on the image or link below to order your now.

CW001632 Century Wings 1/72nd scale LTV A-7D Corsair II 23rd TFW 75th TFS U.S.A.F EL218 England AFB 1981  RRP £127.00  Flying Tigers only £99.99


 

Hobbymaster new model arrivals this week at Flying Tigers.

New Hobbymaster models have arrived and are available to order at Flying Tigers today. Limited remaining stock availability… please click on the image or link below to order your now. Pre-ordered models will be with you shortly.

Flying Tigers will also consolidate your orders to save on postage costs across all brands !

Please click on the images / links below to go to the model of your choice, or CLICK HERE to see them all in the Future Models section.

Sorry the following models are sold out at pre-order stage. Only those customers who have pre-ordered will be supplied… HA6602 Eurofighter, HA6604 Eurofighter.

HA6701 Hobbymaster 1/72nd scale Tornado IDS 44+43, JaBoG 34 Allgau, Luftwaffe, 1980s  RRP £95.00  Flying Tigers only £70.99

HA6702 Hobbymaster 1/72nd scale Tornado GR.1 ZA 592″G”, No. 9 Sqn., RAF Honington, 1983  RRP £96.00  Flying Tigers only £75.99

HA5115 Hobbymaster 1/72nd scale F/A-18E Super Hornet 410/168478, VFA-151 “Vigilantes”, 2019  RRP £114.00  Flying Tigers only £84.99

HA5116 Hobbymaster 1/72nd scale F/A-18E Super Hornet NF200 (CAG Aircraft), VFA-27 “Royal Maces”, USS Ronald Reagan, 2017  RRP £120.00  Flying Tigers only £89.99

HA6603 Hobbymaster 1/72nd scale Eurofighter Typhoon EF2000 14-06, 142 Sqn., Spanish Air Force “NATO Tiger Meet 2016” RRP £106.00  Flying Tigers only £78.99

HA4815 Hobbymaster 1/72nd scale Grumman E-2C Hawkeye “Tiger Meet” 166417, French Navy, 2016  RRP £122.00  Flying Tigers only £91.99

HA4814 Hobbymaster 1/72nd scale Grumman E-2T Hawkeye 2505, ROCAF, Taiwan  RRP £118.00  Flying Tigers only £88.99

SM8009 Skymax 1/72nd scale  TBD-1 Devastator “Battle of Midway” T-16, LCDR John C. Waldron VT-8, USS Hornet, 4th June 1942  RRP £80.00  Flying Tigers only £59.99

SM8010 Skymax 1/72nd scale TBD-1 Devastator “Battle of Midway” T-3, Ensign William R. Evans, VT-8, USS Hornet, 4th June 1942  RRP £80.00  Flying Tigers only £59.99


 

Hobbymaster Updated Photo Gallery

Check out the latest photos from Hobbymaster that have now been added to the Flying Tigers website. Please click on the image / link below to go to the model page.

HA8750 Hobbymaster 1/48th scale BF109G-6 “Erich Hartmann” 4./JG 52 Hungary, 1944  RRP £94.00  Flying Tigers only £62.99


 

That is all for this week.

Thank you for reading this week’s Newsletter.

Richard.

Flying Tigers.

Filed Under: Flying Tigers, Newsletter Tagged With: Century Wings, Corgi Aviation Archive, Newsletter, Latest Hobbymaster models, Flying Tigers Newsletter, Mitsubishi Ki-21 Sally

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