Bristol Siddeley BS 75 Turbofan: Technical Features of the BS 75 Which Has a By‐Pass Ratio of 1·75 to I

THE Bristol Siddeley 75 turbofan, which has been designed primarily for civil applications, has a maximum sea level thrust of 7,550 lb. and is suitable for twin‐engined short to medium range airliners of about 50,000 lb. all‐up‐weight, or four‐engined airliners of 70,000 to 90,000 lb. all‐up‐weight.