TCDS E-289

Page No. 1 2 Rev. No. 2 2 FEDERAL AVIATION AGENCY E-289 Revision 2 WRIGHT Cyclone 990C7BA1 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 990C7BA1 Type 7RA Direct drive Rating (impeller gear ratio) 7.21:1 Maximum continuous hp, rpm, in.Hg., at: Critical pressure altitude (ft.) 700-2400-37.0-7300 Sea level pressure altitude 700-2400-39.5-S.L. Takeoff hp, rpm, in.Hg., at: Critical pressure altitude (ft.) 800-2600-42.5-5500 Sea level pressure altitude 800-2600-43.5-S.L. Fuel (minimum grade aviation gasoline) Grade 91/96 Lubricating oil WAD Specification No. 5815 or 5818 Bore and stroke, in. 6.125 X 6.312 Displacement, cu. in. 1301 Compression ratio 6.2:1 Weight (dry), lb. 1070 C.G. location (dry) Foward of mounting flange centerline, in. 5.29 Above propeller shaft, in. 0.08 Propeller shaft, SAE No. 40 Crankshaft dampers - Torsional & Lateral 3 1/2 order - Front & Rear Carburetion Stromberg PD9G1 Ignition, dual Bosch S7LU-3 magnetos Timing, °BTC 20 Spark plugs See Note 4. NOTES 1, 2, 3, 4, 5 Certification basis Type Certificate No. 289 issued August 9, 1956 Production basis Production Certiicate No. 8 NOTE 1. Maximum permissible temperatures: Cylinder Head Cylinder Base Oil Inlet 450°F 325°F 220°F 500°F for takeoff only E-289 2 NOTE 2. Fuel and oil pressure limits: Maximum Minimum Fuel pressure 23 21 Oil pressure 70 60 NOTE 3. The following accessory provisions are provided: Direction of Maximum Torque (in.-lb.) Maximum Overhang Moment Accessory Rotation* Speed** Cont. Static (in.-lb.) Starter C 1.000:1 — 25800 300 Fuel pump CC 1.000:1 25 450 — Tachometer C 0.500:1 7 50 — Spare C 0.500:1 7 50 — *"C" - clockwise; "CC" - counter-clockwise facing engine pad **Speed - times crankshaft rpm NOTE 4. The following spark plugs are approved on these engines: AC 172, 181, 272, 281 BG RB19R-2, RB27R-1 Champion R119, R819, REA87N, REB87N, RHA87N, RHB87N NOTE 5. This engine is approved for helicopter application and operation, and is eligible for installation in a 39° nose-up attitude. ....END.....