and tested an aft-fan demonstrator Avon to compete with the greater thrust and lower specific fuel consumption of the CJ805-23. In the end, the Caravelle was instead re-engined with the P&W JT8D turbofan. The CJ805 program was not a commercial success, and GE lost approximately $80 million on the program with only a few hundred engines produced in total. In service, the design proved fragile, but these problems led to the programs ultimate success for the company. During the time they were talking to airline CEOs, in 1956 the company hired the former head of American Airlines' maintenance department, John Montgomery, to run the production lines. Montgomery gathered comments from the industry on the state of the engine market, and found that many were complaining about the unreliability of the large piston engines then being used, notably the Wright R-3350. Wright management refused to put more money into the program to improve the engine, leading to a serious backlash from the customers. Montgomery hired Walter Van Duyan away from Wright to set up GE's service department, and they provided excellent service in spite of the engine's problems. GE quickly gained a reputation for standing behind their products that endures to this day. The work on the 805 also had several spin-off products. Among them was another aft-fan design, the General Electric CF700 used in the Dassault Falcon 20 business jet, which was developed from the General Electric J85 in the same way as the J79 was adapted to the 805. Their fan technology was also used in the XV-5 Vertifan. Variants and applications CJ805-1 CJ805-2 CJ805-3Convair 880 CJ805-3AConvair 880-22 : Revised variable inlet guide vane and stator control. CJ805-3BConvair 880-22M : Increased thrust. CJ805-11 CJ805-13 CJ805-21 CJ805-23Flight testing in a Douglas RB-66: Aft-fan variant with a direct drive fan attached to a free-running LP turbine. CJ805-23A CJ805-23BConvair 990 CJ805-23CIntended for the proposed Sud Aviation Caravelle 10A. Only a single airframe, intended as a prototype for the US market, was equipped with the CJ805. TF35Military version of the CJ805-23 turbofan. Specifications (CJ805-3B) Specifications (CJ805-23B) See also Notes References Citations Bibliography External links General Electric Aviation, J79 page GE: The History of Aircraft Engines (CJ805 mentioned) Animation of J79 turbojet (German language) CJ805 1950s turbojet engines Low-bypass turbofan engines