Franklin O-300
The Franklin O-300 (company designation 6AC-298) was an American air-cooled aircraft engine of the early 1940s. The engine was of six-cylinder, horizontally-opposed layout and displaced 300 cu in (5 L). The power output ranged between 130 hp (97 kW) and 175 hp (130 kW) depending on variant. The 6ACG-298 featured a geared propeller drive.
| O-300/6AC-298 | |
|---|---|
| Type | Piston aircraft engine |
| National origin | United States |
| Manufacturer | Franklin Engine Company |
| First run | 1941 |
An enlarged displacement version was known as the O-315, 6A3 or 6AL-315.
Variants
O-300
- 6AC-298
- 6AC-298-F3 (O-300-1)
- 130 hp (97 kW) at 2,600 rpm
- 6ACT-298
- 150 hp (112 kW) at 3,000 rpm
- 6ACT-298-J4 (O-300-3)
- 150 hp (112 kW) at 2,930 rpm
- 6ACT-298-35 (O-300-11)
- 150 hp (112 kW) at 2,930 rpm
- 6ACG-298-P5 (O-300-9)
- Geared propeller drive 0.63:1, 160 hp (119 kW) at 3,200 rpm
- 6ACTS-298
- Supercharged, 160 hp (119 kW) at 3,200 rpm
- 6ACTS-298-K4 (O-300-7)
- Supercharged, 175 hp (130 kW) at 3,000 rpm
- 6ACV-298
- Vertical installation for helicopters,160 hp (119 kW) at 3,250 rpm
O-315 (6A3)
- 6AL-315
- 175 hp (130 kW)
- 6ALG-315
- 175 hp (130 kW)
Applications
Direct drive
- Aeronautical Products A-1
- Aeronautical Products A-3
- CNNA HL-6
- Culver XPQ-9
- Culver XPQ-14, YPQ-14A, XPQ-15
- Bell 30
- Bellanca T-14
- Erco XPQ-13
- Fleetwings 33
- Hockaday Comet
- Piper P-1
- Troy A
- Zodiac Libra-Det
Geared drive
Supercharged
- Northwestern XPG-1 (Waco CG-4 twin-engine conversion)
Specifications (6AC-298)
Data from
General characteristics
- Type: 6-cylinder air-cooled horizontally opposed aircraft piston engine
- Bore: 4.25 in (108 mm)
- Stroke: 3.5 in (88.9 mm)
- Displacement: 297.9 in³ (4.88 L)
- Dry weight: 260 lb (118 kg)
Components
- Cooling system: Air-cooled
Performance
- Power output: 130 hp (97 kW) at 2,600 rpm
References
- Notes
- Bibliography
- Gunston, Bill. (1986) World Encyclopedia of Aero Engines. Patrick Stephens: Wellingborough. p. 57
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