TCDS TC 5E-12

AVCO CORPORATION, LYCOMING DIVISION MODELS: Avco Lycoming Military O-435-2-M1 T.C. NUMBER: 5E-12 Model O-435-2-M1 Type 6HOA Reduction gear ratio -642: 1 Rating: Maximum continuous, hp, rpm, in. Hg., S.I. press. alt. 185-2800-24.8-S.L. Take-off, hp, rpm, at full throttle 235-3200 Fuel (minimum octane aviation gasoline) 91/98 Bore and stroke, in. 4.875 x 3.875 Displacement, cu. in. 434 Compression ratio 7.5: 1 Weight (dry), lbs. 405 C.G. location (dry) Forward of rear mounting face, in. 12.9 Below propeller shaft C.L., in. 0.7 Propeller shaft, SAE No. 20 Carburetion Bendix PS-5C carburetor with 380123-1 setting Ignition, dual Scintilla SF6LN-8 magneto Ignition timing, deg. BTC 25 Spark plugs BG-RB-485S Oil sump capacity, quarts 12 NOTE 1. Maximum permissible cylinder head, barrel, and oil inlet temperature, 525 degrees F., and 220 degrees F., respectively. NOTE 2. Fuel pressure limits (psi) 9.0-15.0, oil pressure limits (psi) 60-80. NOTE 3. The following accessory drives are provided: Drive Drive Ratio Generator 1.25: 1 Starter 1: 1 Fuel Pump 1: 1 Vacuum or hydraulic pump 1.33: 1 NOTE 4. Military O-435-2 engines bearing only serial numbers L00849-11 through L-1117- 11, have six damper crankshafts and are eligible for this modification. Other O-435-2 engines have four damper crankshafts and consequently are not eligible for this modification or approval. NOTE 5. When the modifications to Associated Aircraft Modification Company’s Drawing No. 30350C is completed on eligible O-435-2 engines, (1) the designation “M1” is to be stamped after the model designation on the nameplate to read “O-435-2-M1” and (2) “CAA Specifications No. 5E-12” is to be stamped on the nameplate or on another plate permanently attached to the engine.