TCDS TC 199

AVCO CORPORATION, LYCOMING DIVISION MODELS: Avco Lycoming O-145-A1, -A2 T.C. NUMBER: T.C. 199 Model O-145-A1 O-145-A2 Type 4HOA - - - - Rating: Maximum continuous, hp, rpm, S.L. press. alt. 50-2300-S.L. 55-2300-S.L. Take-off, hp, rpm, at full throttle 50-2300 55-2300 Fuel (minimum octane aviation gasoline) 80 - - - - Bore and stroke, in. 3.625 x 3.500 - - - - Displacement, cu. in. 161.3 - - - - Compression ratio 5.65: 1 - - - - Weight (dry, lbs.) 150, 147 (with SF4LN-20 103, 157 (with SF4LN-20 or -21 magneto) or -21 magneto) C.G. location (dry) Forward of rear mount C.L., in. 4.9 4.5 Below shaft S.L., in. 1.5 1.6 Propeller shaft Integral flange, 6-3/8 in. - - - - circle Carburetion Stromberg NA-S2 or - - - - NA-S2A with 1-1/8 in. venturi or Marvel MA-2, MA-2A or MA-3-A with 1.141 in. venturi Ignition Single Dual Magneto Scintilla SF-4 or Edison- - - - - Splitdorf RMA-6 Ignition timing, deg. BTC 28 20 Spark plugs PG 4B2, S; 417, 3; Champion - - - - AY4; LM-31, S; Edison- Splitdorf HC-83 Oil sump capacity, quarts 5 - - - - Certification basis Type Certificate No. 199 (See NOTE 2) NOTE 1. Maximum permissible cylinder head, barrel and oil inlet temperatures, 525 degrees F., 325 degrees F., and 200 degrees F., respectively. NOTE 2. Approval expired 11/2/50. No engines of these models manufactured after the dates shown below or with serial numbers of those indicated, are eligible for use in certificated aircraft: Model O-145-A1; Serial No. 4253 except 3532, 3552 and 3553; 8/1/41. Model O-145-A2; Serial No. 5915-2; 8/24/49. NOTE 3. The following accessories are eligible for use on the specified engine models at the indicated additional weights: Fuel pump, AC Diaphragm type 3 lbs. AC Air Cleaner, Chevrolet Part No. 1529265 - - - -