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Post Info TOPIC: Kawasaki KH-7

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Posts: 1328
Date: Nov 25, 2016
Kawasaki KH-7
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Project from the early 1970s for a medium seven/ten seat helicopter with hingeless rotor system... supposedly a predecessor to the Bk-117 (the transmission is said to have been derived from the KH-7 project possibly indicating a prototype had been constructed)

Said to have two 590shp Lycoming turbine engines (Avco-Lycoming LTS-101-650B-1 of the later BK-117 maybe?) according to The Illustrated Encyclopedia of Helicopters 1984. Other sources claim it used borrowed MBB Bo-105 components.

Is there more info or pics avaiable of this type?


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Posts: 500
Date: Nov 26, 2016
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I think this project began in 1974. The Bo 107 was also being developed at the time and Boeing-Vertol had discussed the KHI project to MBB to which they decided to partner with them after hearing about cost and market concerns. The Bo 107 was then merged with he KH-7 program following the withdraw of Boeing-Vertol.

Alan Dallas


Posts: 3381
Date: Nov 28, 2016
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Flight International, January 1975:

LTS101 Free-turbine two-shaft turboshaft. Development testing of the LTS101 started in June 1972 as a company-financed programme to provide an engine for the Bell and Hughes designs for the US Army Aerial Scout (AAS) helicopter programme. Cancellation of this programme during that year led Lycoming to develop the engine for the commercial market. FAA certification was planned for the latter part of 1974, by which time some 4,000hr testing should have been complete. Production deliveries are scheduled to start early next year when 55 bench and other test engines will have been built. The first production application of the engine is the Bell Model 222, powered by two 600 s.h.p. LTS101-650Cs, which is to fly towards the end of this year. Production deliveries for this helicopter should start during 1978. The LTS101-600B has also been selected for the new Kawasaki KH-7 twin-engine helicopter, first flight of which is targeted for late 1975. Other possible applications include the Aerospatiale SA.366 and MBB Bo115, both of which are twin engine designs. Initial production LTS101 engines will have a 1,200hr authorised operating time (AOT) with rapid growth to 5,000hr.
LTS101 Single-stage axial plus single-stage centrifugal compressor with integral inlet particle separator, reverse-flow annular combustor, single-stage compressor and power turbines. Integral front-mounted gearbox. Take-off 592 s.h.p.; pressure ratio 8'4:1; mass flow 4-8lb/sec; length 31in; height 25'9in; width 16in; weight 230lb.


Flight International, October 1976:

KH-7 Kawasaki says there are still several issues to settle before it can launch the KH-7 light twin-engined helicopter in co-operation with MBB in Germany. The objective is to pool available technology and to extend the potential market. Powered by a pair of Lycoming LTS101s, the KH-7 would carry six or eight people, but would be smaller than its nearest competitor, the Bell 222. Co-operation with Germany should reduce development cost to each company, which is important for Kawasaki. The original target date for first flight of a prototype, November 1976, has certainly slipped.

Brony rotorhead
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