Franklin O-300
{{Short description|Early 1940s American air-cooled aircraft engine}}
{{Use mdy dates|date=March 2022}}
{{Use American English|date=March 2022}}
| {{Infobox Aircraft Begin
|name= O-300/6AC-298 |image = |caption = }} {{Infobox Aircraft Engine |type= Piston aircraft engine |national origin = United States |manufacturer= Franklin Engine Company |first run= 1941 |major applications= |number built = |program cost = |unit cost = |developed from = |developed into = |variants with their own articles = }} |
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 {{convert|300|cuin|L|abbr=on|0}}. The power output ranged between {{convert|130|hp|kW|abbr=on|0}} and {{convert|175|hp|kW|abbr=on|0}} depending on variant. The 6ACG-298 featured a geared propeller drive.
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):{{convert|130|hp|kW|abbr=on|0}} at 2,600 rpm
;6ACT-298:{{convert|150|hp|kW|abbr=on|0}} at 3,000 rpm
;6ACT-298-J4 (O-300-3):{{convert|150|hp|kW|abbr=on|0}} at 2,930 rpm
;6ACT-298-35 (O-300-11):{{convert|150|hp|kW|abbr=on|0}} at 2,930 rpm
;6ACG-298-P5 (O-300-9):Geared propeller drive 0.63:1, {{convert|160|hp|kW|abbr=on|0}} at 3,200 rpm
;6ACTS-298:Supercharged, {{convert|160|hp|kW|abbr=on|0}} at 3,200 rpm
;6ACTS-298-K4 (O-300-7):Supercharged, {{convert|175|hp|kW|abbr=on|0}} at 3,000 rpm
;6ACV-298:Vertical installation for helicopters,{{convert|160|hp|kW|abbr=on|0}} at 3,250 rpm
=O-315 (6A3)=
;6AL-315:{{convert|175|hp|kW|abbr=on|0}}
;6ALG-315:{{convert|175|hp|kW|abbr=on|0}}
Applications
=Direct drive=
=Geared drive=
=Supercharged=
- Northwestern XPG-1 (Waco CG-4 twin-engine conversion)
Specifications (6AC-298)
{{pistonspecs
|
|ref={{fact|date=December 2017}}
|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)
|length=
|diameter=
|width=
|height=
|weight=260 lb (118 kg)
|valvetrain=
|supercharger=
|turbocharger=
|fuelsystem=
|fueltype=
|oilsystem=
|coolingsystem=Air-cooled
|power=130 hp (97 kW) at 2,600 rpm
|specpower=
|compression=
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=
}}
See also
{{aircontent
|see also=
|related=
|similar engines=
|similar aircraft=
|lists=
}}
References
;Notes
{{reflist}}
;Bibliography
{{refbegin}}
- Gunston, Bill. (1986) World Encyclopedia of Aero Engines. Patrick Stephens: Wellingborough. p. 57
{{refend}}
{{Franklin aeroengines}}
{{US military piston aeroengines}}
Category:Franklin aircraft engines