Kawasaki Ki-91 Long Range Heavy Bomber Project

[Deltafan]

Hi windswords-san! Good question.
In 1943, the Ha 112-II Le single-stage two-speed super charged engine with a turbocharger developed by Mitsubishi was decided to be installed on the Type 100 reconnaissance aircraft, and the Army developed it as the Ki-46-IV. In December of the same year, the first prototype of the Ki-46-IV was completed. Developed on the basis of the Type 3 (Ki 46-III) without major remodeling, it succeeded in its first flight on January 12, 1944 at the Kakamigahara Army Airfield. As a result, a maximum speed of 630km / h / 10,000m was recorded, and the high altitude performance was improved by 50km / h or more compared to the Type 3 (Ki46-III).
After refurbishment and examination, it was planned to be put into practical use in February 1945 (Showa 20), but the war ended before mass production.

At 10:00 am on February 27, 1945, two Type 4 (Ki 46-IV) equipped with turbochargers took off from Nanyuan Airfield in Beijing and flew to Fussa's Tama Army Airfield. It took 3 hours and 35 minutes for the No. 1 aircraft and 3 hours and 15 minutes for the No. 2 aircraft from the takeoff in Beijing to the stop in front of the Fussa hangar. The actual flight distance was 2,250 km, with an average speed of over 700 km / h. The jet stream in the winter helped them to gain an advantage, but there was a problem during takeoff (the second aircraft took off again in Beijing. The first aircraft that took off waited for the second aircraft and turned over Beijing. Repeatedly lost time) and bad weather (Beijing weather on that day was powder snow and visibility was only about 2 km, it was a complete cloudy to the Korean Peninsula).When they landed at Tama Airfield, there was enough fuel in the tanks located front of the fuselage.

Hi,

is there a known photo or drawing of the Ki-46-IV ?

 

[windswords]

Materials would have been the major roadblock there, I would suspect. Possibly with a bit of bureaucratic infighting mixed in.

You bring up a good point. What if they had the knowledge and the manufacturing resources, but lacked the ingredients? That would have been just as bad as not having the technical know how or the manufacturing ability to pull it off. IIRC jet engines, at least those very early ones like the Ne-20 didn't have as much high RPM stress as the turbines in a turbo supercharger. Not that the early jets RPMs were slow, just they were not at the crazy levels of exhaust driven turbos.

 

[Noveos]

Hi windswords-san! Good question.
In 1943, the Ha 112-II Le single-stage two-speed super charged engine with a turbocharger developed by Mitsubishi was decided to be installed on the Type 100 reconnaissance aircraft, and the Army developed it as the Ki-46-IV. In December of the same year, the first prototype of the Ki-46-IV was completed. Developed on the basis of the Type 3 (Ki 46-III) without major remodeling, it succeeded in its first flight on January 12, 1944 at the Kakamigahara Army Airfield. As a result, a maximum speed of 630km / h / 10,000m was recorded, and the high altitude performance was improved by 50km / h or more compared to the Type 3 (Ki46-III).
After refurbishment and examination, it was planned to be put into practical use in February 1945 (Showa 20), but the war ended before mass production.

At 10:00 am on February 27, 1945, two Type 4 (Ki 46-IV) equipped with turbochargers took off from Nanyuan Airfield in Beijing and flew to Fussa's Tama Army Airfield. It took 3 hours and 35 minutes for the No. 1 aircraft and 3 hours and 15 minutes for the No. 2 aircraft from the takeoff in Beijing to the stop in front of the Fussa hangar. The actual flight distance was 2,250 km, with an average speed of over 700 km / h. The jet stream in the winter helped them to gain an advantage, but there was a problem during takeoff (the second aircraft took off again in Beijing. The first aircraft that took off waited for the second aircraft and turned over Beijing. Repeatedly lost time) and bad weather (Beijing weather on that day was powder snow and visibility was only about 2 km, it was a complete cloudy to the Korean Peninsula).When they landed at Tama Airfield, there was enough fuel in the tanks located front of the fuselage.

Hi,

is there a known photo or drawing of the Ki-46-IV ?

Ki-46 attacker/fighter variants

Lets start off with a Brief History Lesson The Mitsubishi Ki-39 was a design for a twin-engined heavy fighter. It was produced in response to a Japanese Army specification of 1937 that called for a twin engined heavy fighter and that was issued to Nakajima Ki-37, Kawasaki Ki-38 and Mitsubishi Ki-...

forum.warthunder.com

 

[Deltafan]

Thanks a lot Noveos

We can see the turbochargers on the engines of the IV (the III did not have them). And that's what I wanted to find

 

[blackkite]

Hi! Ki-46 Ⅳ. You can see turbocharger exhaust gas outlet nozzle located under side of the engine nacelle tail.
And you can't see engine exhaust nozzles at the engine cowl.
Turbocharger air intake was located upper side of the engine nacelle tail.
Source : Famous aircraft of the world.　

 

[Deltafan]

Great thanks blackite