TCDS E-256

Page No. 1 2 Rev. No. 6 6 FEDERAL AVIATION AGENCY E-256 Revision 6 AVCO LYCOMING GSO-580 GS0-580-B GSO-580-C GSO-580-D April 22, 1959 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. Manufacturer AVCO Manufacturing Corp. Lycoming Division Williamsport, PA Model Lycoming GSO-580, GSO-580-C GSO-580-B, GSO-580-D Type 8HOA 77:120 - - Reduction Gearing Rating Max. continuous, hp, rpm, in.Hg., at: Rated pressure altitude (ft.) 320-3000-32.0-7000 350-3000-35.2-5000 Sea level pressure altitude (ft.) 320-3000-34.0-S.L. 350-3000-37.0-S.L. Takeoff (5 minutes), hp, rpm, in.Hg., at: 375-3300-39.5-S.L. 400-3300-41.5-S.L. Fuel (Min. grade aviation gasoline) 91/98 Grade 100/130 Bore and stroke, in. 4.875 X 3.875 - - Displacement, cu. in. 578 - - Supercharging ratio 7.9:1 - - Compression ratio 7.30:1 - - Weight (dry), lbs. 619 (GSO-580) 624 (GSO-580-B) 604 (GSO-580-C) 608 (GSO-580-D) C.G. location (dry) See NOTE 5 - - Propeller shaft, SAE No. 20 Spline 30 Spline Carburetion, Bendix with PSH-9BDE (GSO-580) PSH-9BDE (GSO-580-B) 2.5 in. venturi PS-9BDE (GSO-580-C) PS-9BDE (GSO-580-D) Ignition, Dual Scintilla SF8LN - - Timing, °BTC 25 - - Spark plugs See Note 7 - - NOTES 1, 2, 3, 5, 7 1, 2, 3, 5, 7 "- -" indicates "same as preceding model." Certification Basis Type Certificate No. 256 Production Basis Production Certificate No. 3 E-256 2 Note 1. Maximum permissible temperature: Cylinder Head (Well Type) Cylinder Base Oil Inlet 475°F 325°F 225°F NOTE 2. Min. Max. Fuel pressure limits 9 psi 15 psi Oil pressure limits (normal operation) 55 psi 85 psi (idling 25 psi) NOTE 3. The following accessory provisions are provided: GSO-580 GSO-580-C Direction of Rotation Facing Speed X Crank Shaft Maximum Torque (in.-lb.) Maximum Overhang Moment Accessory GSO-580-B GSO-580-D Engine Pad RPM Cont. Static (in.-lb.) Starter X X C 1.000:1 - 12000 300 Generator X C 1.184:1 200 800 350 Generator X C 2.600:1 500 2200 400 Fuel Pump X C .783:1 25 450 - Fuel Pump X C .803:1 25 450 25 Vacuum pump X C 1.241:1 100 800 25 Vacuum pump X C 1.219:1 200 800 25 Hydraulic pump X C 1.00:1 250 1650 50 Hydraulic pump X C 1.083:1 300 1650 75 Tachometer X X C .50:1 7 50 - Prop. governor - X C .801:1 125 825 - NOTE 4. Deleted November 9, 1953 NOTE 5. Center of Gravity GSO-580 Location GSO-580-B GSO-580-C GSO-580-D From front face of thrust nut, inches 27.0 26.55 26.69 From crankshaft center line, inches .4 below .16 above .51 above .07 right .07 right NOTE 6. The GSO-580-C and GSO-580-D are similar to the models GSO-580 and GSO-580-B respectively except for incorporation of crosswise accessory drive provisions. NOTE 7. The following spark plugs are approved on these engines: AC S-86R, SR-83P, HSR-83P Autolite SH-2K, SH-2M, SH-20, SH-20A BG RB485S Champion R25S, RED37N, REM37N, RHD37N, RHM37N ....END....