TCDS E-264

Page No. 1 2 3 Rev No. 9 9 9 Reformatted 12/93. FEDERAL AVIATION AGENCY E-264-9 PRATT & WHITNEY Double Wasp CB3 CB16 CB17 CB4 June 6, 1962 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 Corp. East Hartford, Conn. Model Double Wasp CB3 CB16 CB17 CB4 Type 18RA .45:1 Reduction gear - - - - - - Rating (With low impeller gear ratio) 7.29:1 - - - - - - Maximum continuous, hp, rpm, in.Hg., at: Rated pressure altitude (ft.) 1800-2600-46.5-9200 - - 1900-2600-50.0-7100 - - Sea level pressure altitude 1800-2600-48.5-S. L. - - 1900-2600-51.5-S. L. - - Takeoff (5 min.), hp, rpm, in.Hg., at: Critical altitude 2050-2700-53.0-6900 - - 2200-2800-59.0-5200 - - Sea level 2050-2700-55.0-S. L. - - 2200-2800-60.0-S. L. - - or Critical Altitude 1950-2800-51.0-9800 - -   Sea level 1950-2800-53.0-S. L. - -   (With anti-detonant injection) Critical altitude 2400-2800-59.0-5000 - - 2500-2800-61.5-3700 - - Sea level 2400-2800-59.5-S. L. - - 2500-2800-62.0-S. L. - - (With high impeller gear ratio)  8.58:1 - - - - Maximum continuous, hp, rpm, in.Hg., at: Rated pressure altitude (ft.)  1700-2600-47.5-16250 1750-2600-49.5-15000  Low critical pressure alt. (ft.)  1700-2600-49.0-10000 1750-2600-51.5-10000  Takeoff (5 min.), hp, rpm, in.Hg., at: (With anti-detonant injection) High critical pressure altitude  1850-2600-48.0-16500 1900-2600-49.0-15700  Low critical pressure altitude  1850-2600-49.5-10000 1900-2600-50.5-10000  Fuel (minimum grade aviation gas.) 100/130 - - 108/135 - - Lubricating oil See P&WA Service Bulletin - - - - - - No. 1183 Bore and stroke, in. 5.75 X 6.00 - - - - - - Displacement, cu. in. 2804 - - - - - - Compression ratio 6.75:1 - - - - - - Weight (dry), lbs. 2367 2400 - - 2367 C.G. location Fwd. of mounting lug rear edge, in. 11.6 - - - - - - Above propeller shaft CL, in. .2 - - - - - - Propeller shaft, SAE No. 60-A - - - - - - Carburetion Stromberg PR-58E-5 Carb. - - - - - - Ignition, Dual Scintilla Low or High Tension - - - - - - Timing, °BTC 20 - - - - - - Spark plugs See NOTE 7 - - - - - - NOTES 1,2,3,4,5,6,7,8 1,2,3,4,5,6,7,8 1,2,3,4,5,6,7,8 1,2,3,4,5,6, 7,8 "- -" indicates "same as preceding model" "" indicates "does not apply" E-264 Page 2 Certification basis Type Certificate No. 264 Production basis Production Certificate No. 2 NOTE 1. Maximum permissible cylinder head, cylinder barrel, and oil inlet temperatures are 500°F, 350°F, and 212°F respectively. The cylinder head temperature is measured with a well type thermocouple. NOTE 2. Pressure Limits - normal operation Max. Min. Fuel pressure, p.s.i. 25 21 Oil pressure, p.s.i. 100 60 NOTE 3. The following accessory drives are provided: Rotation* Speed** Maximum Torque (in.-lb.) Overhang Moment Continuous Static (in.-lb.) Starter C 1.000  30000 350*** Generator C 3.033 600 3000 300 Fuel pump CC 0.864 355 1380 10 Vacuum or hydraulic pumps (2 provided) C 1.400 250 2250 50 Power takeoff C 1.400 1300 12000 350*** Propeller governor CC 0.964 125 825  *"C" - Clockwise viewing pad, "CC" - Counterclockwise. **Speed - Times crankshaft speed. ***Maximum combined overhang moment for both generator and power takeoff pads shall not exceed 650 in.-lb., neither drive pad shall exceed 350 in.-lb. NOTE 4. Models CB16 and CB17 are similar except for the fuel used and power ratings. Models CB3 and CB4 are similar except for the fuel used and power settings. All engines incorporate built-in torquemeters. Model designation plate on engines need not be changed for occasional use of alternate fuel and ratings. NOTE 5. The takeoff ratings using anti-detonant injection are permissible when the engine is equipped with a Pratt & Whitney water regulator at an additional weight of 13 lbs. ADI fluid flow is 9.2 lbs./min. in low blower 2400 bhp; 11.5 lbs./min in low blower for 2500 bhp; 7.8 lbs./min. in high blower for 1900 bhp. The ADI fluid may be composed of any of the following solutions by volume: Methyl Alcohol 50%, Water 50% Methyl Alcohol 60%, Water 40% { Per P&W Specification 509 Methyl Alcohol 50%, Ethyl Alcohol 25%, Water 50% Methyl Alcohol 60 parts, Water 40 parts, Anticorrosion oil 1 part, per British Specification D-Eng.R.D.2470, dated 1/8/46. NOTE 6. Scintilla low tension ignition system consists of one DLN-10 dual magneto, two low tension distributor units and 18 cylinder head mounted ignition coils. Scintilla high tension ignition system consists of one DF-18LN dual magneto and two high tension distributors. NOTE 7. The following spark plugs are approved on these engines: AC 161, 165, 171, 175*, 181, 261, 265, 271, 27 3, 275*, 281 BG 240, 245, 340, 341, 345, 346, RB19R-2, RB21R-1, RP27R, RB27R-1, RB39R. Champion R33S*, R37S-1, R56S, R111, R115, REA29N*, REA32N, REA37N, REB29N*, REB32N, REB37N, RHA29E*, RHA32N, RHA32E, RHA37E, RHA37N, RHB32E, RHB32N, RHB29E*, RHB29N*, RHB37E, RHB37N. Lodge RS19-2R. Autolite Autolite SL30, SL300, SL400** *May be used in rear position of both front and rear rows but not in front of either row. **Rear position front row only. E-264 Page 3 NOTE 8. Engines incorporating the original CA type crankshaft with the heavyweight front damper and lightweight rear damper will be identified by having the suffix "H" added to the engine model designation on the nameplate. Example: Double Wasp CB3H. The CB type crankshaft with two lightweight dampers will require no change in the engine model designation for identification of the crankshaft. ....END....