TCDS E-143

Page No. 1 2 Rev. No. 4 4 FEDERAL AVIATION AGENCY E-143 Revision 4 Pratt & Whitney WASP S3H1 August 7, 1973 AIRCRAFT ENGINE SPECIFICATION Engines of models described herein conforming with this specification and approved data on file with the Federal Aviation Agency meet the minimum standards for use in certificated aircraft in accordance with pertinent aircraft specifications and applicable portions of the Civil Air Regulations provided they are installed, operated, and maintained as prescribed by the approved manufacturer's manuals and other approved instructions. Manufacturer Pratt & Whitney Aircraft Division of United Aircraft Corporation East Hartford, Connecticut Model Wasp S3H1 Type 9RA - Direct drive Rating (Impeller gear ratio) 10:1 Maximum continuous, hp., rpm, in.Hg., at: Critical altitude (ft.) 550-2200-32.5-5000 Sea level pressure altitude (ft.) 550-2200-34.0-S.L. Takeoff (5 minutes), hp., rpm, in.Hg., at: Critical altitude (ft.) 600-2250-35.5-3000 Sea level pressure altitude (ft.) 600-2250-36.0-S.L. (See Note 5) Fuel (minimum grade aviation gasoline) 80/87 Lubricating oil See P&WA Service Bulletin No. 1183 Bore and stroke, in. 5.75 X 5.75 Displacement, cu. in. 1344 Compression ratio 6:1 Weight (dry), lb. 865 Propeller shaft, SAE No. 40 Carburetion Stromberg NA-Y9B, C, H, E1 with 2-3/4 in. venturis or PD-9D1 with 2-1/2 in. venturis Ignition, Dual Scintilla SB9R or Bosch SB9RU2 and SB9RU3 magnetos Timing, °BTC 25 Spark plugs See Note 6 Notes 1, 2, 3, 4, 5, 6 Certification basis Type Certificate No. 143 Production basis Production Certificate No. 2 NOTE 1. Maximum permissible temperatures are as follows: Cylinder Head Cylinder Barrel Oil Inlet 500°F. 300°F. 200°F. NOTE 2. Fuel and oil pressure limits: Fuel pressure (psi) 3-6 Oil pressure (psi) 70-90 E-143 2 NOTE 3. The following accessory drives are provided: Direction of Rotation (Clockwise or Counter- Speed Ratio (Times Crankshaft Maximum Torque (in. lb.) **Maximum Overhang Clockwise) Speed) Cont. Static (in.-lb.) Starter CC 1.0 2300 10,000 180 Generator C 1.5 100 300 183 Generator (opt.) C 2.0 150 900 183 Fuel pump CC 1.0 150 450 10 Aux. accessory CC 1.0 *150 450 10 Tachometer R.H. C .5 15 45 10 L.H. CC .5 15 45 10 Goverrnor C 1.144 60 250 - Vacuum pump C 1.5 *100 300 10 *Maximum combined drive load of vacuum pump and fuel pump must not exceed 150 in.-lb. **Maximum allowable accessory moments in in.-lb., provided no destructive accessory drive or mounting pad forces resulting from accessory vibration are present. Early Wasp engines incorporate tongue and groove vacuum and fuel pump drives. All later engines have spline type drives. NOTE 4. Eligible with automatic power and mixture control when the NA-Y9C carburetor is used at a weight increase of 12 pounds. NOTE 5. (a) Ratings are based upon the best power mixture strength and 450°F cylinder head temperature. (b) With the use of grade 91/96 fuel, the following ratings may be used: Maximum continuous, hp, rpm, in.Hg., at: Critical altitude (ft.) 550-2200-33.0-4500 Sea level pressure altitude (ft.) 550-2200-34.0-S.L. Takeoff (one minute), hp, rpm, in.Hg., at: Critical altitude (ft.) 600-2250-36.0-2300 Sea level pressure altitude (ft.) 600-2250-36.5-S.L. NOTE 6. The following spark plugs are approved on this engine: AC SR-83P, S-86R, HSR-86, HSR-83P Autolite SH-2K, SH-2M, SH-20 BG 321S, 417S, SS485A, RB485S, 706SR Champion C27S, ED41N, EM41N, RC26S, RED39N, REM39N, RHD39M, RHM39N .....END.....