Galloway Atlantic
| Atlantic | |
|---|---|
| |
| Paired V12 500hp Galloway Atlantic engines fitted to a Handley Page V/1500 | |
| Type | Water-cooled V12 aero engine |
| National origin | United Kingdom |
| Manufacturer | Galloway Engineering |
| First run | 1918 |
| Major applications | Handley Page V/1500 |
| Number built | 72 |
| Developed from | Galloway Adriatic |
The Galloway Atlantic is a 500 hp V12 aero engine that was ordered into production towards the end of WW1. The Atlantic saw postwar service in Handley Page V/1500 bombers built by Galloway’s parent company, William Beardmore & Co.[1] In contemporary publications the type is often referred to as the Beardmore, or BHP, Atlantic or 500 hp.[2]
Design and development
[edit]The Galloway Atlantic is essentially a double form of the Galloway Adriatic with two banks of six cylinders set at 60 degrees working a single crankshaft. The articulated master-and-slave connecting rods allows corresponding cylinders in each row to be arranged directly opposite each other but gives the 6 cylinder bank with the articulated rods a longer stroke than the opposing bank.[3][4]
The cylinders on the Atlantic are made of cast iron in blocks of three. Cast iron cylinder blocks had previously been tried on some Adriatic engines due to the difficulties of casting and machining aluminum.[5]
The Atlantic was the most powerful engine fitted to the Handley Page V/1500 heavy bomber and was one of the most powerful aero-engines of its time.[4][6]
Aircraft number E8287 was the first of the Beardmore built Handley Page V/1500s and was fitted with four Galloway Atlantic engines. The aircraft had been handed over to the Royal Air Force by December of 1918. The Atlantic engines can be distinguished from the Rolls Royce Eagle engines, which were also in use on the V/1500, by the absence of exhaust pipes.[1]
800 engines were ordered from Beardmore’s subsidiary companies; Arrol-Johnston and Galloway Engineering. Most were cancelled when WW1 ended. Only 72 engines were completed all of these being built at Galloway's factory in Kirkcudbright near Dumfries, Scotland.[4]
The Atlantic was the last aircraft engine type manufactured by Galloway with the factory switching over to automobile production during the 1920s.[7]
Applications
[edit]Engines on display
[edit]A preserved Galloway Atlantic engine is on display at the Frontiers of Flight Museum in Dallas, Texas. The engine is on loan from the University of Texas at Dallas.[8]
Specifications
[edit]Data from Angle[3] & Lumsden[4]
General characteristics
- Type: Water–cooled, upright, V12 piston engine
- Bore: 5.71 in (145 mm)
- Stroke: 7.48 in (190 mm) and 7.95 in (202 mm) on side with articulated rods
- Displacement: 2,301 cu in (37.7 L)
- Length: 74.1 in (1,882 mm)
- Width: 34.17 in (868 mm)
- Height: 43.5 in (1,105 mm)
- Dry weight: 1,210 lb (549 kg)
Components
- Valvetrain: One intake + two exhaust valves per cylinder
- Fuel system: Two carburetors mounted in the Vee between the cylinder banks
- Fuel type: Gasoline
- Oil system: Dry sump. Vacuum distilled mineral oil.
- Cooling system: Water-cooled
- Reduction gear: None. Direct drive.
Performance
- Power output: 500 hp (373 kW) @ 1500 rpm (rated)
- Compression ratio: 4.9:1
- Specific fuel consumption: 0.53 lb/(hp⋅h) (0.322 kg/kWh)
- Oil consumption: 0.068 lb/(hp⋅h) (0.041 kg/kWh)
- Power-to-weight ratio: 0.417 hp/lb (0.686 kW/kg) at rated
See also
[edit]Comparable engines
Related lists
References
[edit]- ^ a b Bruce, J.M (January 1962). "Handley Page V/1500". Air Pictorial. 24 (1): 109–114.
- ^ "A forecast of the exhibits of accessories and material at Olympia". The Aeroplane. United Kingdom. 30 June 1920. p. 1264, 1293.
- ^ a b Angle, Glenn D. (1921). Airplane Engine Encyclopedia. Dayton, Ohio, USA: The Otterbein Press. pp. 207–210.
- ^ a b c d Lumsden, Alec (2002). British Piston Engines and their Aircraft. Airlife Publishing. pp. 181–186. ISBN 1853102946.
- ^ Bruce, J.M (1 June 1956). "The DeHavilland D.H.9A". Flight. 69: 679.
- ^ Hourwich, Iskander; Foster, W J (1925). Air Service Engine Handbook. Dayton, Ohio, USA: Engineering division McCook field. p. 79.
- ^ Worthington-Williams, Michael (August 1995). "The Galloway Story". The Automobile. 13: 70–76.
- ^ "Galloway Atlantic". Frontiers of Flight - Dallas. Archived from the original on 2023-03-28.