TCDS TC 225

FRANKLIN ENGINE COMPANY MODELS: Aircooled Motors 6AC-298 Series and 6ACT-298 Series T.C. NUMBER: T.C. 225 Model - Franklin 6AC-298-D2, D3 6AC-298-E2, E3 6AC-298-F2, F3 6ACT-298-J4, J5 (O-300-11) 6ACT-298-M4 Type 6HOA - - - - - - - - - - - - - - - - Rating: Maximum continuous, hp, rpm, in. Hg., or full throttle at: Rated press. alt. S.L. press. alt. - - - - 130-2600-F.T.- S.L. - - - - 130-2450-F.T.- S.L. - - - - 130-2550-F.T.- S.L. 90-3200-F.T.-1700 130-3200-F.T.-7500 130-3200-23.3- S.L. or 155-2930-F.T.- S.L. - - - - - - - - Take-off, hp, rpm, in. Hg., or full throttle 130-2600-F.T. 130-2450-F.T. 130-2550-F.T. 130-3200-23.3 or 155-2930-F.T. - - - - Fuel (minimum octane aviation gasoline) 73 80 - - - - 100 - - - - Bore and stroke, in. 4.25 x 3.50 - - - - - - - - - - - - - - - - Displacement, cu. in. 298 - - - - - - - - - - - - - - - - Compression ratio 6.3: 1 7: 1 - - - - 8.4: 1 - - - - Weight (dry), lbs. 260, 267 265, 272 261, 268 298, 308 290 Propeller shaft Special with integral flange 8-7.16 in. bolt, -5 in. circle - - - - - - - - - - - - - - - - Carburetion Marvel MA- 3A or MA-3 carburetor with 1-3/8 in. venturi Dual Marvel MA-3A carburetors with 1-3/8 in. venturi Marvel MA- 3A or MA-3 carburetor with 1-3/8 in. venturi Dual, Marvel MA- 3PAA carburetors with 1-3/8 in. venturi Dual, Marvel MA-3A carburetors with 1-3/8 in. venturi Ignition, dual Eisemann 1A- 6 magnetos with impulse coupling (retard 25 degrees) - - - - - - - - Scintilla SF6-RN-8 magnetos - - - - Ignition, timing, deg. BTC 28 - - - - - - - - J4 - 30, J5 - 28 30 Oil sump capacity, quarts 8 - - - - - - - - 8-1/4 10 Spark plugs Champion AJ- 66, C-10S, 78S; Simmonds- - - - - - - - - - - - - - - - - Benton 4D3- S; AC SA- 47; Auto-Lite A5-B or A4- S Certification basis Type Certificate No. 225 (See NOTE 5) NOTE 1. Maximum permissible cylinder head, cylinder barrel and oil inlet temperatures, 500 degrees F., 300 degrees F., and 240 degrees F., respectively, for all except the 6ACT-298-J4, J5 and M4 models whose limits are 480 degrees F., 300 degrees F., and 220 degrees F., respectively. NOTE 2. In addition to the differences shown above, the following similar engine models have identifying characteristics as noted: Models 6ACT-298-M4 One generator, central zone type oil pan manifold 6ACT-298-J4 Two generators, two gallery type intake manifolds 6ACT-298-J5 (O-300-11) One large generator (with brace) two gallery type intake manifolds NOTE 3. The following accessories are eligible for use on the specified engine models at the indicated additional weights: Optional Accessories Weight (lbs.) Generator Auto-Lite type GAS or GDY (Models - 3 only) 12 Auto-Lite type No. 11496 (Models - 4 only) 12 Auto-Lite type No. 11497 (Models - 4 only) 12 Leece-Neville, type E7A (J5 only) 22 Starter Auto-Lite, type MBG or MZ (Models - 3 only) 16 Delco-Remy, type No. 10749 (Models - 3 only) 16 Delco-Remy, type No. 10750 (Models - 4 and 5 only) 16 Fuel Pump AC, type No. 10739 3 Hydraulic Pump Pesco Model 196-C (Models - 4 only) 3 Pesco Model 196-CE (J5 only) 3 Vacuum Pump Pesco Model 194-E (Models - 4 only) 4 Pesco Model B-12 (J5 only) 5 The following accessory drives are provided: Direction of Rotation, C = Clockwise Drive Speed Maximum Accessory Nearest AN Pad Designation CC = Counter- clockwise (X Crankshaft RPM) Maximum Torque (in. - lbs.) Continuous Static Overhang Moment (in. lbs.) Starter None CC 11.444: 1 - - - - 240 30 *Generator None CC 1.000: 1 8 15 45 **Generator None CC 1.650: 1 8 15 45 ***Generator AND 10002 C 1.160: 1 600 3600 100 Tachometer AND 10005 CC 0.500: 1 20 60 2 **Vacuum or Hydraulic Pump AND 10000 C 1.000: 1 75 300 25 Vacuum or Hydraulic Pump AND 10000 CC 1.269: 1 150 2250 25 *All except 6ACT-298-J4 and J5 ** -J4 only *** -J5 only NOTE 4. The corresponding commercial model designations or military engine models installed in certificated aircraft must be incorporated on the engine nameplate at least by the first overhaul period. NOTE 5. Approval expired 11/5/50. No engines of these models manufactured after the date shown below or with serial numbers above those listed are eligible for use in certificated aircraft: Models Date Last Engine Manufactured Serial No. 6AC-298-D2, D3 9/23/43 400123 6AC-298-E2, E3, F2 12/12/40 400108 6AC-298-F3 12/30/44 400225 6ACT-298-J4 8/30/43 400156 6ACT-298-J5, -M4 3/25/46 3-522116