| 词条 | Fiat 4700 | ||||||||||||||
| 释义 |
The Fiat 4700 was an Italian turbo-generator developed by Fiat Aviazione under contract to the Italian Defence Ministry and used to power the experimental Fiat 7002 tip jet helicopter. Design and developmentThe Fiat 4700 was developed to provide power in cold-jet driven helicopters. The 4700 was a turbo-driven air compressor driven by the primary engine, a turbojet engine based on the Fiat 4002. The compressor and primary engine are mechanically independent. The engine is mounted vertically to reduce the length of the compressed-air ducts to the rotor. The engine was used on the Fiat 7002 helicopter which first flew on 26 January 1961 where the Fiat 4700 was used to power the cold tip-jets on the two-blade rotor.[6] Applications
Specification{{jetspecs|ref=Jane's All the World's Aircraft 1962-63.[1] |type=Gas generator |length={{convert|1300|mm|in|abbr=on|2}} (height) |diameter={{convert|612|mm|in|abbr=on|2}} |weight={{convert|152|kg|lb|abbr=on|2}} |compressor=Single-sided centrifugal flow + gas generator single-sided centrifugal flow compressor driven by the free power turbine |combustion=Annular with 16 burners |turbine=1-stage axial flow (gas turbine power) + 1-stage axial flow free power turbine (Gas generator power) |fueltype=Aviation kerosene to MIL-F-5624 (JP-4) |oilsystem=Re-circulating pressure system with one pressure pump and three scavenge punmps, oil grade DERD 2479. |power={{convert|610|hp|kW|abbr=on|2|disp=flip}} (gas hp for take-off), {{convert|505|hp|kW|abbr=on|2|disp=flip}} (ghp max continuous) |thrust= |compression=4:1 |bypass= |aircon={{convert|5.1|kg/s|lb/s|abbr=on|2}} at 25,000 rpm at sea level, {{convert|7.36|lb/s|kg/s|abbr=on|2|order=flip}} (max continuous) |turbinetemp= |fuelcon= |specfuelcon={{cvt|0.758|kg/kW/h|lb/hp/h}} |power/weight= {{cvt|2.99|kW/kg|hp/lb}} |thrust/weight= }} See also{{aircontent|see also= |related= |similar aircraft= |lists=
|similar engines=
}} ReferencesNotes1. ^{{cite book|last=Taylor|first=John W.R. FRHistS. ARAeS|title=Jane's All the World's Aircraft 1962-63|year=1962|publisher=Sampson, Low, Marston & Co Ltd|location=London}} [2]2. ^1 2 {{cite journal | title= Fiat 7002 flies| journal= Flight International | page= 138| date= 3 February 1961 |url=http://www.flightglobal.com/pdfarchive/view/1961/1961%20-%200138.html}} }}{{refbegin}}{{refend}}{{Fiat aeroengines}}{{Aeroengine-specs}} 1 : Fiat aircraft engines |
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