×
Aircraft / Aviation Vehicles & Artillery Infantry Arms Warships & Submarines Military Pay Scale Global Military Ranks
HOME
AVIATION / AEROSPACE
MODERN AIR FORCES
COUNTRIES
MANUFACTURERS
COMPARE
BY CONFLICT
BY TYPE
BY DECADE
SECRET WEAPONS OF THE IJA/IJN
WORLD WAR 2
X-PLANE

Yokosuka R2Y (Keiun)


Reconnaissance / Heavy Fighter Prototype


Aviation / Aerospace

1 / 1
Image from the Public Domain.

Just one flyable prototype - eventually destroyed by American bombs - was witnessed for the Yokosuka R2Y fighter project.



Authored By: Staff Writer | Last Edited: 8/24/2020 | Content ©www.MilitaryFactory.com
Heading into 1945, the Imperial Japanese military services were hard-pressed to find viable fighters and turn the tide of the war in the Pacific. Many aircraft projects were undertaken but very few were actually realized, mainly due to the quickly deteriorating situation in Japan proper (caused largely by the American bombing effort on major Japanese infrastructure and weapons-producing facilities). Just prior to the end of the war - which came in August of 1945 for the Japanese Empire - the concern of Yokosuka undertook work on a new fighter platform with reconnaissance capabilities. This product turned out to be the short-lived R2Y "Keiun" ("Cirrus Cloud") which existed only in prototype form before its own end came. A first flight was recorded on May 8th, 1945.

The R2Y was intended for service with the Imperial Japanese Navy (IJN) and followed the unsuccessful, underperforming, R1Y development. The newer design seated a crew of two and carried a pair of coupled engines (2 x Aichi Atsuta of 1,700hp, collectively designated the Aichi Ha-70) driven by a single gearbox. Output power was 3,400 horsepower and a six-bladed propeller unit was fitted at the nose. The cockpit was set well-forward along the tubular fuselage which shifted the engine installations to midships and aft. A retractable tricycle undercarriage gave the R2Y a very modern appearance. The tail unit incorporated a single fin with traditional horizontal planes. Dimensions included a length of 42.9 feet, a wingspan of 45.10 feet and a height of 13.8 feet - the R2Y was a large aircraft for its intended operating class. Empty weight was 13,260lb and Maximum Take-Off Weight (MTOW) reached 20,725lb.

Performance-wise, the design could manage a maximum speed of 480 miles per hour, a range out to 2,250 miles and a service ceiling up to 38,375 feet. Rate-of-climb reached 3,610 feet-per-minute.

The aircraft's armament suite appears to not have been finalized but it most likely would have revolved around automatic cannons fitted to the nose section.

The prototype was made available as soon as April (1945) and this example was the one taken into the air in May. The flight was of short duration and the vehicle was parked when it was caught under the bombs of an American air raid - proving a total loss for the project. This effectively killed any future the R2Y program had. A short-lived jet-powered offshoot, the R2Y2 "Keiun-Kai", was also considered but the proposal was not furthered beyond an incomplete prototype by war's end.


Specifications



Year:
1945
Status
Cancelled
Crew
2
[ 1 Units ] :
Yokosuka - Imperial Japan
National flag of Imperial Japan Imperial Japan
- Fighter
- Reconnaissance (RECCE)
- X-Plane / Developmental
Length:
42.81 ft (13.05 m)
Width:
45.93 ft (14 m)
Height:
13.94 ft (4.25 m)
(Showcased structural dimension values pertain to the Yokosuka R2Y production model)
Empty Weight:
13,261 lb (6,015 kg)
MTOW:
20,723 lb (9,400 kg)
(Diff: +7,463lb)
(Showcased weight values pertain to the Yokosuka R2Y production model)
1 x Aichi Ha-70 inline piston engine (2 x Aichi Atsuta of 1,700 horsepower each) developing 3,400 horsepower driving a six-bladed propeller unit at the nose.
(Showcased powerplant information pertains to the Yokosuka R2Y production model)
Max Speed:
478 mph (770 kph; 416 kts)
Service Ceiling:
41,667 feet (12,700 m; 7.89 miles)
Max Range:
2,243 miles (3,610 km; 1,949 nm)
Rate-of-Climb:
3,610 ft/min (1,100 m/min)
(Showcased performance values pertain to the Yokosuka R2Y production model; Compare this aircraft entry against any other in our database)
ASSUMED:
2 OR 4 x Automatic cannons fitted to the nose or wing assemblies.
(Showcased armament details pertain to the Yokosuka R2Y production model)
R2Y - Base Series Designation; single prototype destroyed in Allied air raid.
R2Y2 - Proposed twin turbojet-powered form; incomplete prototype.
Military lapel ribbon for Operation Allied Force
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of Britain
Military lapel ribbon for the Battle of Midway
Military lapel ribbon for the Berlin Airlift
Military lapel ribbon for the Chaco War
Military lapel ribbon for the Cold War
Military lapel ribbon for the Cuban Missile Crisis
Military lapel ribbon for pioneering aircraft
Military lapel ribbon for the Falklands War
Military lapel ribbon for the French-Indochina War
Military lapel ribbon for the Golden Age of Flight
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Iran-Iraq War
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1982 Lebanon War
Military lapel ribbon for the Malayan Emergency
Military lapel ribbon representing modern aircraft
Military lapel ribbon for the attack on Pearl Harbor
Military lapel ribbon for the Six Day War
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Suez Crisis
Military lapel ribbon for the Vietnam War
Military lapel ribbon for Warsaw Pact of the Cold War-era
Military lapel ribbon for the WASP (WW2)
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur War
Military lapel ribbon for experimental x-plane aircraft
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.

Disclaimer | Privacy Policy | Cookies


The "Military Factory" name and MilitaryFactory.com logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. We do not sell any of the items showcased on this site. Please direct all other inquiries to militaryfactory AT gmail.com.

Part of a network of sites that includes GlobalFirepower, a data-driven property used in ranking the top military powers of the world and WDMMA.org, the World Directory of Modern Military Aircraft.


Facebook Logo YouTube Logo

www.MilitaryFactory.com • All Rights Reserved • Content ©2003-