Taylor J-2

The Taylor J-2 Cub (later also known as the Piper J-2 Cub) is an American two-seat light aircraft that was designed and built by the Taylor Aircraft Company. The company became the Piper Aircraft Company and the J-2 was first of a long line of related Piper Cub designs.

Development

The J-2 Cub was a development of the earlier Taylor Cub. In 1935 the Taylor Aircraft Company had decided to improve their Cub line of aircraft which were angular and austere-looking and initially had an unglazed cabin area.

The new J-2 had rounded-off wing tips, a similarly "rounded" fin and rudder framed up and fabric-covered separately from the fuselage structure, enclosed cabin and wider Goodyear "airwheel" tires, a special low-pressure variety of aircraft landing gear tire pioneered by Alvin Musselmann U.S. Patent 1,877,360 in 1929 that resembled a later tundra tire in general appearance and proportions. Powered by a 37 hp Continental A-40-3 piston engine the aircraft appeared in October 1935 and the type certificate was issued on 14 February 1936. From September 1936 the engine was changed to a 40 hp Continental A-40-4. One sub-type was produced, the J-2S which was a float-equipped version.

J2

J2, J.II or J-2 may refer to:

Codes and classifications

, the Earth's second dynamic form factor in the Nodal precession

People and organizations

Rocketdyne J-2

The J-2 was a liquid-fuel cryogenic rocket engine used on NASA's Saturn IB and Saturn V launch vehicles. Built in the U.S. by Rocketdyne, the J-2 burned cryogenic liquid hydrogen (LH2) and liquid oxygen (LOX) propellants, with each engine producing 1,033.1 kN (232,250 lb_f) of thrust in vacuum. The engine's preliminary design dates back to recommendations of the 1959 Silverstein Committee. Rocketdyne won approval to develop the J-2 in June 1960 and the first flight, AS-201, occurred on 26 February 1966. The J-2 underwent several minor upgrades over its operational history to improve the engine's performance, with two major upgrade programs, the de Laval nozzle-type J-2S and aerospike-type J-2T, which were cancelled after the conclusion of the Apollo program.

The engine produced a specific impulse (I_sp) of 421 seconds (4.13 km/s) in a vacuum (or 200 seconds (2.0 km/s) at sea level) and had a mass of approximately 1,788 kilograms (3,942 lb). Five J-2 engines were used on the Saturn V's S-II second stage, and one J-2 was used on the S-IVB upper stage used on both the Saturn IB and Saturn V. Proposals also existed to use various numbers of J-2 engines in the upper stages of an even larger rocket, the planned Nova. The J-2 was America's largest production LH2-fuelled rocket engine before the RS-25 Space Shuttle Main Engine. A modernized version of the engine, the J-2X, is intended for use on the Earth Departure Stage of NASA's Space Shuttle replacement, the Space Launch System.