BMW 114 (aircraft engine)
| BMW | |
|---|---|
 BMW 114 liquid-cooled |
|
| 114 | |
| Production period: | 1936 |
| Manufacturer: | BMW |
| Working principle: | diesel |
| Motor design: | S9 |
| Valve control: | OHV |
| Displacement: | 27700 cm 3 |
| Mixture preparation: | Lanova |
| Engine charging: | Centrifugal compressor |
| Lubrication system: | Dry sump lubrication |
| Power: | 460 kW |
| Dimensions: | 550 kg |
| Previous model: | none |
| Successor: | none |
The BMW 114 is an aircraft engine prototype from Bayerische Motoren Werke . It is a nine-cylinder radial engine with diesel technology .
development
From 1936, three test models were produced under the designation BMW 114, which were constructed on the basis of the BMW 132 A petrol engine with a charger . Two of them were air-cooled and one was liquid-cooled . The two air-cooled models differed in the type of injection pumps (nine individual pumps or one block pump ). The Lanova injection process was used for all samples . The liquid-cooled engine received six small segment coolers in the spaces between the cylinders (see illustration).
Technical difficulties arose from the high thermal stress (burned areas in the air reservoir and cylinder head in the air-cooled versions and cracked cooling water jackets in the liquid-cooled engine) and the fuel injection (injection lines of different lengths in the block pump, dripping of the injection nozzles due to the elasticity of the lines).
The experiments were stopped again in 1937. There was no series production.
Technical specifications
- Number of cylinders: nine in a single-row star arrangement
- Functional principle: four-stroke diesel
- Gas exchange: two valves per cylinder, OHV valve control
- Displacement: 27.7 l
- Supercharging: single-stage centrifugal compressor driven by the crankshaft
- Boost pressure: 1.175 bar at starting power (liquid-cooled version)
- Power: 460 kW at 2,050 min -1
- Compression ratio: 14.8: 1
- Dimensions: (length × width × height): 1300 × 1400 × 1400 mm
- Mass: 550 kg
- Specific fuel consumption
- air-cooled version: at full load (456 kW at 2,050 min −1 ): 266 g / kWh
- air-cooled version: at continuous power (375 kW at 1,939 min -1 ): 224-231 g / kWh
- liquid-cooled version: at full load (460 kW at 2,050 min -1 ): 265-272 g / kWh
Comparable engines
- Bristol Phoenix
- Clerget 9A and 14F-01
- Československá zbrojovka ZOD 260-B
- Guiberson A-1020
- Packard DR-980
literature
- Kyrill von Gersdorff, Kurt Grasmann, Helmut Schubert (1995) Aeroengines and jet engines Bernard & Graefe Verlag. ISBN 3-7637-6107-1