Rolls-Royce RB401

RB.401
Type	Turbofan
Manufacturer	Rolls-Royce
First run	1975

The Rolls-Royce RB.401 was a two-spool business jet engine which Rolls-Royce started to develop in the mid-1970s^[1] as a replacement for the Viper.^[2] RB.401-06 prototype engines were already being manufactured when a decision to develop the higher thrust RB.401-07 was taken. Although ground testing of both the -06 and -07 continued into the early 1980s, a lack of funds caused the project to be cancelled.

Design and development

Although the basic configuration of both engines was almost identical, the -07 variant had a larger fan diameter. The -06 version HP compressor was based on the eight-stage version of the RC34B research compressor, unscaled, whereas the -07 was a scaled-up unit. A single stage fan, driven by a two-stage LP turbine, supercharged the HP compressor which was driven by the single stage transonic HP turbine. The combustor was annular and the co-annular exhaust featured a lightweight target type thrust reverser.

Specifications (RB.401-07)

General characteristics

Type: High bypass Turbofan
Length:
Diameter: 32.4 in (fan)
Dry weight:

Components

Compressor:

Performance

Maximum thrust: Take-off Thrust(Sea Level Static): 5,540 lbf, flat-rated to ISA+15C
Overall pressure ratio: ~20:1
Power-to-weight ratio:

References

Notes

↑ Gunston 1989, p.155.
↑ http://www.flightglobal.com/pdfarchive/view/1979/1979%20-%202715.html

Bibliography

Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9

Rolls-Royce plc aero engines

Turbofans	Advance 2 Advance 3 AE 3007 BR700† EJ200† F136† RB183 RB282 RB401 RJ500† Spey Junior Tay Trent series Trent 500 Trent 700 Trent 800 Trent 900 Trent 1000 Trent XWB V2500

Turboprops/Turboshafts	501 AE 2100 M250 MTR390† RR300 RR500 T56 T406 T800† TP400†

Other fan-type engines	RB2011 RB3011 LiftSystem

Aero-derivative industrial and marine engines	Gas turbines: MT30 MT7 WR-21

† Joint development aero engines See also Rolls-Royce Limited aero engines

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