FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1973
1973 - 0033.PDF
FLIGHT International, 4 January 1973 25 feederliner and discussions have been held with Rolls-Royce on possible licence manufacture by R-R's Small Engine Divi sion. A production decision on the Falcon 30 is expected soon, and engineering drawings for the HS.146 could be issued in April if UK Government support is forthcoming for this project. ALF-502D Single-stage fan and 1-p compressor, seven-stage h-p compressor, annular combustor, two-stage h-p and 1-p turbines. Take-off 5,5001b; bypass ratio 6:1; length 56-8in; diameter 42in; weight 1,1601b. General Electric CF34 (USA) Two-shaft turbofan. A projected civil version of the military 9,2751b TF34, and proposed as an alternative engine for the VFW-Fokker 614. Rolls-Royce/Snecma M45 series (UK & France) Two-shaft turbofans. Among proposed derivatives of the M45H (see previous thrust section) are lower-thrust projects including the 5,0601b M45M (RB.407) and 6,3001b-12,0001b M45T (RB.424) mixed-duty v-p geared turbofan designed to supply a large continuous air-bleed for ultra-quiet Stol transports. The 5,0001b-10,0001b sector is showing signs of increasing activity as the VFW-Fokker 614 flight-test programme gets back into its stride, and the ALF-502 series has the energetic backing of Lycoming as an important engine in helping the US company overcome the dip in its military turboshaft sales as helicopter purchases in support of the Vietnam war decline. The relative ratings of the ALF-502 and M45H are such that if the Lycoming engine successfully launches itself in the Falcon 30 it could compete strongly with the Anglo- French unit in any new applications, af it is already doing on R-R's Small Engine Division doorstep. " Although the TF34 is acquiring increasing actual and potential military applications, it would seem unlikely that GE will continue to ignore the commercial potentials of the engine. This would effectively sandwich the M45H between two military-backed US engines. 2,5001b, 11kN-5,000lb, 22kN TFE371 i^j CF700 -:- ' Ill CJ610 j) j AI-25 ' . . . . j I JT12Aj:;;fe ... ' I "1 ;yiper5Ml|-v' .. : • j[ ] Viper 600;||; j 5,0001b Garrett AiResearch ATF-3 (USA) Three-shaft turbofan. The first triple-shaft aircraft turbine to be built in the United States, the ATF-3 ran on test in May 1968. Chosen for the North American Rockwell Sabreliner 50 and Hansa HFB 330, it subsequently suffered development delays, leading to NAR taking break-of-contract action against Garrett AiResearch owing to non-delivery of engines. This action was withdrawn in May of last year, at the same' time as the switch to the General Electric CF700 turbofan was made for the Sabre liner. The present emphasis is on military developments, for which the ATF-3 has a $6 million (£2-5 million) contract to power a USAF reconnaissance drone, and the USN also has a requirement for an uprated engine with 5,0001b hot-day thrust. ATF-3 Single-stage fan, five-stage i-p compressor, single-stage h-p compressor, annular combustor, single-stage h-p turbine, three-stage i-p turbine, two-stage 1-p turbine. Take-off 4,0501b', bypass ratio 3:1; pressure ratio 24:1; length 91-8in; diameter 40-0in; weight 8741b. Garrett AiResearch TFE731 (USA) Geared two-shaft turbo fan. Aerodynamically based on the GTCP 660 APU for the Boeing 747, the TFE731 has progressed through a series of design changes since it was first announced in April 1969. The current version, the 3,5001b TFE731-2, recently received Garrett's ATF3 is a three-spool turbofan which has logged several thousand hours on the bench. Though built for commercial use, the present market appears to be largely directed at military applications The Lycoming ALF-502 is to fly soon in a Mystere 30 and, in a contro versial move, has been chosen by Hawker Siddeley for its HS.146 feederliner. Its military counterpart is the FI02 FAA certification and production is scheduled to reach about ten engines per month by the middle of this year. The main application is the Dassault-Breguet Falcon 10, and Garrett AiResearch has also recently decided to allocate money for re-engining a Lockheed JetStar with four 3,7001b TFE731-3& as the start of a major retrofit programme. A further applica tion is the Gates Learjet Model 26, which is expected to fly with TFE731s during the second half of this year. In all three installations the AiResearch engine has effectively displaced earlier-generation GE and P&W turbines, and discussions have also started on possible retrospective fitting of the TFE731 in the R-R Viper turbojet-powered Hawker Siddeley HS.125400. TFE731-2 Single-stage fan, four-stage 1-p compressor, single- stage h-p compressor, annular combustor, single-stage h-p turbine, three-stage 1-p turbine. Take-off 3,5001b; bypass ratio 2-67:1; pressure ratio 15-1:1; mass flow 351b/ser; length 49-7in; width 34-2in; height 39- lin; weight 6251b. General Electric CF700 (USA) Two-shaft turbofan. The CF700 is an aft-fan version of the J85 military turbojet with a scaled version of the CJ805-23 fan. Its military counterpart is the TF37. Together with the CJ610 civil turbojet, the CF700 has accumulated more than 2-5 million hours in service. Its
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
