17 February 1951: UN Forces launch a counterattack against PLA and KPA forces. By this point, they have been forced south to near the 3th parallel.
February 1951: B-47 begins entering USAF service. It represents a significant performance improvement over the B-29.
26 March 1951: UN forces (again) recapture Seoul.
9 April 1951: Truman fires MacArthur.
19 April 1951: The US Navy issues a requirement for a seaplane capable of carrying an atomic bomb over a range of 2500 km, while operating at Mach .9 at low altitude. Following the cancellation of the USS United States in favor of the Air Force B-36, the Navy is desperate for a strategic weapons platform.
July 1951: Ceasefire negotiations begin. They will continue intermittently until the end of the war. By now, front lines have stabilized near the prewar borders, with fierce fighting continuing between UN and Communist forces.
February 1952: MiG-17 begins entering Soviet squadron service. Despite North Korean requests, the Soviet Union refuses to deploy the aircraft to Korea.
21 February 1952: First flight of the Soviet Tu-16 (previously designated Tu-88) bomber. The aircraft is the first jet-powered strategic bomber in Soviet service. It is capable of carrying a freefall nuclear bomb, or one Kh-5 air-launched cruise missile. The Kh-5 is a refinement of the earlier Kh-3, and has a range of 180 km with a 1000 kg warhead.
13 March 1952: First flight of the B-52 bomber. The aircraft, which was initially designed as a straight-winged turboprop powered bomber, has evolved into a jet-powered, swept wing design.
May 5 1952: Recognizing that the CF-100 will be less useful against future Soviet bombers, the RCAF submits the Final Report of the All-Weather Interceptor Requirements Team to Avro Canada.
May 7 1952: Bombing raids begin against North Korea’s hydroelectric infrastructure. Most of the raids are conducted at night, due to the B-29’s vulnerability to North Korean MiGs.
28 July 1952: First flight of aircraft VX770, the first prototype of the Avro 698 bomber aircraft. The massive, delta-winged aircraft is completely unlike any other aircraft yet seen. Most notable is its wing planform, as well as the lack of a single vertical tail. Instead, there are only two small rudders at the outboard section of the wings, with the end result that the design closely resembles a flying wing. The VX770 displays surprising maneuverability for its size, and handles excellently. The aircraft will ultimately be accepted into RAF service as the Vulcan.
21 September 1952: First flight of the Douglas X-3 experimental aircraft. The aircraft, designed to reach speeds of up to Mach 3, is severely underpowered, and a failure in its intended role.
7 November 1952: First flight of the Soviet Tu-95, the loudest aircraft in existence. The first flight of the prototype coincides with the 35th anniversary of the beginning of the October Revolution.
5 December 1952: First flight of the Handley Page HP.80 bomber aircraft. The aircraft, later renamed the Victor, will end up forming a significant portion of the British strategic deterrent, along with the Vulcan.
6 April 1953: First flight of the North American F-100, a significantly improved version of the F-86. The F-100 is capable of reaching supersonic speeds in level flight, unlike its predecessor.
6 June 1953: The Saab 210, an experimental aircraft designed to test the double-delta wing planform, makes an appearance at Stockholm’s 700th anniversary celebrations.
10 June 1953: Soviet engineer Valentin Glushko and his colleagues at RNII successfully test the R-1, a liquid-fueled rocket with a range of 40km. The Soviet military establishment remains uninterested, and sees the rockets as useless compared to existing strategic bombers. Shortly after the test, Glushko meets with the PLAAF observer contingent, who appear interested in his work.
9 August 1953: Final ceasefire signed, ended armed portion of Korean conflict. UN military forces (including ROK) suffer nearly 300,000 dead. The North Korean and Chinese death toll is almost six times as much.
September 1953: Development begins on the Lockheed CL-282, a high-altitude reconnaissance aircraft intended for overflights of the Soviet Union.
14 September 1953: First flight of the MiG-19, a supersonic follow-on to the MiG-17. The aircraft is heavily armed, with 3 30mm cannons.
16 September 1953: First flight of the F-102 interceptor. The aircraft’s performance is highly disappointing, with the aircraft limited to subsonic speeds.
October 1953: Eugen Sanger publishes a paper describing the thermodynamic loads associated with atmospheric reentry and flight at high-altitudes and Mach numbers. The paper also describes possible methods of reducing heat flux, such as regenerative cooling of the airframe and engines.