TCDS TC 5E11

MCDEIS: Jacobs Military R-755-7 I.C. NUMBER: 5E-11 Model R-755-7 7RA - Lirect drive Fating: Maximum continuous, no. IEm. at s.I. Fressure altitude 225-2000-S.L. Take-off, hp. at full throttle 225-2000 Fuel (minimum octane aviation gasoline) 73 Fore and stroke, in. 5.25 x 5.00 [isplacement, cu. in. 757 compression ratio 5-4:1 height (dry), lts. 512 C_G. location Forward of mounting tosses, in. $/16 Belcw Fror. C.l. in. Fropeller shaft, SAE No. Carburetion Stromterg NA-RA carburetor with 2-1/16 in. venturi Ignition, dual scintilla VMN7-1F magnetos Ignition timing, degrees BIC Spark Flugs Champion M-26, C-26, C-27 NOTES 1, 2, 3, 4, 5 NOTE 1. Maximum permissible cylinder head, barrel and oil inlet temperatures, 535 degrees F., 325 degrees F., and 200 degrees F.. respectively. NOTE 2. Desired fuel pressure 1-1/2 psi. oil pressure limits 60 psi minimum, 80 psi desired and 90 psi m ximum. Optional accessories: Starter - Pad and 10004, Type 1, clockwise rotation facing the fad, speed ratio 1.75 times crarkshaft. Generator - Pad and 10002, clockwise rotation facing the pad, speed ratio 1.75 times crarkshaft. Fuel fump - Pad and 10003, clockwise rotation facing the pad, speed ratio one times crarkshaft. Tachometer - Iwo mechanical tachometer drives are provided with counter-clockwise rotation at one half NOTE 4- Prior to original installation in a certificated aircraft, ascertain that rear main crankcase par: No. 30068 is incorporated. Inspect all gears and busnings in the starter gear train to determine that they are in satisfactory condition. Eclipse starter, type 946 should not be used on this engine model due to its inherently high clutch torque setting. Inertia starters with clutch settings higher than 300 ft.-1bs. should not be used on this engine. similar to the R-755-9 engine which is approved under the 1-4 It the 955 engine which is appaster inder the fou series, eye certificate. 121. HOweVe I, the crankcase and rear case are totally different.