TCDS E-219

Page No. 1 2 3 4 Rev. No. 9 9 9 9 Reformatted 10/94 FEDERAL AVIATION AGENCY E-219 Revision 9 WRIGHT Cyclone 702C9GC1, 2, 3, 4, 5, & 6 (GR-1820G-202A; Military R-1820-60, -71) 704C9GC1, 2, 3, 4, & 5 (GR-1820G-205A; Military R-1820-87, -95) 728C9GC1, 2, 3, 4, 5, & 6 730C9GD1, 2, 3, 4, 5, & 6 731C9GC1 & 2 December 28, 1983 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 Curtiss Wright/Marquette, Inc. Fountain Inn, South Carolina Model Cyclone 702C9GC1, 2, 3, 4, 5, & 6 728C9GC1,2,3,4,5 & 6 Type 9RA-Propeller reduction gearing 3:2 on models 1,2,3 & 4 16:9 on models 5 & 6 3:2 Rating (with low impeller gear ratio) 7:1 - - Maximum continuous, hp, rpm, in.Hg., at: Rated pressure altitude (ft.) 1100-2400-40.0-5500 1100-2400-41.5-4600 or 1000-2300-37.2-6900 or 1000-2300-38.5-6000 Sea level pressure altitude 1100-2400-43.0-S.L. 1100-2400-44.0-S.L. or 1000-2300-39.5-S.L. or 1000-2300-41.0-S.L. Takeoff (5 minutes) hp, rpm, in. Hg. 1200-2500-45.5 1200-2500-47.0 or 1100-2350-43.0 Rating (with high impeller gear ratio)   Maximum continuous, hp, rpm, in.Hg. at: Rated pressure altitude (ft.)   Low critical pressure altitude (ft.)   Takeoff (5 minutes), hp, rpm, in. Hg., at: Rated pressure altitude (ft.)   Low critical press. altitude (ft.)   Fuel (Minimum grade aviation gas.) 91/96 - - Bore and stroke, in. 6.125 x 6.875 - - Displacement, cu. in. 1823 - - Compression ratio 6.7:1 6.3:1 Weight (dry), lbs. 1310 for models 1,2,3,4 & 5 1310 for mod. 1,2 & 5 1315 for model 6 1325 for mod. 3, 4 & 6 C.G. location (dry) Fwd. of mounting face, in. 7.5 - - Above prop. shaft, in. .4 - - "- -" indicates "same as preceding model." "" indicates "does not apply." E-219 2 Model Cyclone 702C9GC1, 2, 3, 4, 5, & 6 728C9GC1,2,3,4,5 & 6 Propeller shaft, SAE No. 50 - - Crankshaft dampers - torsional 4½ order - front and rear - - Carburetion Stromberg PD-12H3 or B7 for Stromberg PD-12H3 or B7 for engine models 1 & 4 engine models 1 & 3 Stromberg PD12K10 for models Stromberg PD12K10 for models 3, 5 & 6 5 & 6 Holley 1375C,E,F,H,HA or HAR Holley 1375C,E,F,H,HA or HAR for model 2 for models 2 and 4 Ignition, dual Scintilla SF9L-3,-4, SF9LN-4, or Bosch SF9LU-3, magnetos - - Ignition timing - °BTC 20 - - Spark plugs See NOTE 8 - - NOTES 1,4,5,6,7,8 1,5,6,7,8 Model Cyclone 730C9GD1,2,3,4,5 & 6 704C9GC1,2,3,4 & 5 731C9GC1 & 2 Type 9RA-Propeller reduction gearing 3:2 on models 1,2,3 & 4 3:2 16:9 on model 5 16:9 Rating (with low impeller gear ratio) 7:1 7.14:1 7.13:1 Maximum continuous, hp, rpm, in.Hg., at: Rated pressure altitude (ft.) 1100-2400-39.8-5500 1100-2400-40.0-5500 1100-2400-42.0-4000 or 1000-2300-36.7-6900 or 1000-2300-37.2-6900 1000-2300-38.5-5500 Sea level pressure altitude 1100-2400-42.5-S.L. 1100-2400-43.0-S.L. 1100-2400-43.0-S.L. or 1000-2300-39.0-S.L. or 1000-2300-39.5-S.L. 1000-2300-39.5-S.L. Takeoff (5 minutes) hp, rpm, in. Hg. 1200-2500-45.0 1200-2500-45.5 - - or 1100-2350-43.0 - - Rating (with high impeller gear ratio)  10:1 10:06:1 Maximum continuous, hp, rpm, in.Hg. at: Rated pressure altitude (ft.)  900-2300-40.0-15200 900-2300-42.0-15000 Low critical pressure altitude (ft.)  900-2300-42.5-9700 900-2300-43.0-10000 Takeoff (5 minutes), hp, rpm, in. Hg., at: Rated pressure altitude (ft.)  1000-2500-44.5-14200 1000-2500-47.0-14000 Low critical press. altitude (ft.)  1000-2500-46.0-9200 1000-2500-48.0-9000 Fuel (Minimum grade aviation gas.) - - 91/96 (Grade 100/130 for - - rated high ratio takeoffs) Bore and stroke, in. 6.125 x 6.875 - - - - Displacement, cu. in. 1823 - - - - Compression ratio 6.2:1 6.7:1 - - Weight (dry), lbs. 1310 for mod. 1,2 & 5 1320 for models 1,2 & 5 1320 for model 1 1325 for mod. 3,4 & 6 1335 for models 3 & 4 1326 for model 2 C.G. location (dry) Fwd. of mounting face, in. 7.5 - - 7.2 Above prop. shaft, in. .4 - - .2 Propeller shaft, SAE No. 50 - - - - Crankshaft dampers - torsional 4½ order - front and rear - - - - Carburetion Stromberg PD-12H3 or B7 - - Stromberg PD-12K10 for engine models 1 & 3 Stromberg PD12K10 for Stromberg PD-12K10 for - - models 5 & 6 model 5 Holley 1375C,E,F,H,HA or - - - - HAR for models 2 and 4 "- -" indicates "same as preceding model." "" indicates "does not apply." 3 E-219 Model Cyclone 730C9GM, 2,3,4,5 & 6 704C9CG1,2,3,4 & 5 731C9GC1 & 2 Ignition, dual Scintilla SF9L-3,-4, SF9LN-4, or Bosch SF9LU-3, magnetos Scintilla SF9L-4 magnetos Scintilla SF9LN-4 magnetos Ignition timing - °BTC 20 - - - - Spark plugs See NOTE 8 - - - - NOTES 1,3,5,6,7,8 1,2,4,5,6,7,8 1,5,6,7,8 "- -" indicates "same as preceding model." "" indicates "does not apply." Certification basis Type Certificate No. 219 Production basis Production Certificate No. 8 NOTE 1. Maximum permissible cylinder head, barrel and oil inlet temperatures, 450°F, 325°F and 220°F, respectively. NOTE 2. Models 7049GC1, 2, 3, 4, and 5 are eligible with an equivalent roller clutch 2-speed supercharger with drive ratios 7.134:1 and 10.06:1. NOTE 3. Models 730C9GD - are similar to the models 702C9GC- and 728C9GC- except for the use of forged type cylinder heads which have a 1/8 in. larger exhaust port and other major differences as indicated. NOTE 4. Military model R-1820-71 is equivalent to civil model 70209GC1, Military models R-1820-87 and -95 are equivalent to civil model 704C9GC1. The -87 differs from -95 only in the cylinder baffles and accessories section. Model R-1820-60 may be converted to civil model Cyclone 702C9GC1 in accordance with Wright Aeronautical Corporation's instructions to incorporate at least the following new parts: Supercharger impeller shaft, gear, cover, etc. Nos. 412379, 66682, 66681, 66386, 4040D5 and 34D33 (Remove high blower parts) Breather assembly Nos. 68531, 2075D15, 206709. Hydro oil connection Nos. 68529, 66251, 68530, 68533, 175D7 Carburetor PD-12H3 setting No. 68973N35A When these military engines are used in certificated aircraft, the engine designation plate should be stamped with the corresponding certificated model designation. If there is no room for this information on the existing plate, such information may be stamped on a plain thin metal plate attached beneath the existing plate by at least two of the mounting screws, or a new plate may be secured from the manufacturer. NOTE 5. Models 702C9GC6; 728C9GC3, 4 & 6; 730C9GD3, 4 & 6; 704C9GC3 & 4; and 731C9GC2 incorporate a torquemeter built into the engine nose section. NOTE 6. The above listed power ratings are based on best power mixture at altitudes except for those shown for models 731C9GC1 & 2 which are based on Auto-Rich settings. The 702C9GC series engines are eligible with the following Auto-Rich altitude ratings when using carburetor settings Nos. 68973N35A, 68973N39A or 69267N30A: Maximum continuous, hp, rpm, in. Hg., at rated pressure altitude (ft.) 1100-2400-42.0-3700 or 1000-2300-38.5-5200 NOTE 7. The following accessory drives are provided: Maximum Torque (in. lb.) Maximum Overhang Rotation* Speed** Continuous Static (in. lb.) Starter C 1:0  25800 300 Generator and Accessory gear C 1:5 600 6000 350 Generator and accessory gear 350 (Model 702C9GC4 only) C 3.27 230 1150 Fuel Pump CC 1.0 16.5 450  Vacuum Pump CC 1.5 50 1200 25 Hydraulic Pump CC 1.5 150 2250 50 Propeller Governor C 1.0 260 2000  *"C" = Clockwise viewing pad. "C" = Antilockwise viewing pad. E-219 4 **"Speed" = Times crankshaft speed. NOTE 8. The following spark plugs are approved on these engines. AC 171, 181, 271, 281, 273, LS-87*, LS-88. BG 3B2, 3B2S, 4B2, 4B2S, 314GS, RB19R-2, RB27R-1. Champion R115, C27S, RC34S, RC35S, ED41N, EM41N, R37S-1, REA37N, REB37N, RHA37N, RHB37N, RHA37E, RHB37E. Hahn 702. Jet Ignition J1-1**, J1-1A**. * Limited to use with engines of 1200 hp and under, and for 120 hours of service with no reconditioning permitted. ** Limited to use with engines of 1300 hp and under, and for 120 hours of service with no reconditioning permitted. ....END....