John C. Evans discusses the development of the P&W J-58 engine used in the A-12 and SR-71 Aircraft
Pratt & Whitney Aircraft J-58 (JT11D-20) Characteristics’. Maximum Thrust 34,000 Lb Military Thrust 23,900 Lb Weight 6,250 Lb Length 215.940 In Maximum Diameter 55.43 In Sea Level Air Flow 326 Lb/Sec Compression Ratio 8.5:1 Total Pressure Ratio 2,93:1 Bleed...