Lawrance A-3
| Lawrance Aero Engine Company | |
|---|---|
 |
|
| A-3 / Model A | |
| Production period: | unknown |
| Manufacturer: | Lawrance Aero Engine Company |
| Developing country: |
 United States
|
| First run: | 1916 |
| Working principle: | Otto |
| Motor design: | Boxer engine |
| Cylinder: | 2 |
| Drilling: | 102 mm |
| Hub: | 156 mm |
| Displacement: | 2524 cm 3 |
| Mixture preparation: | Carburetor |
| Engine charging: | no |
| Cooling system: | Air cooling |
| Power: | 21 kW |
| Dimensions: | 90 kg |
| Previous model: | none |
| Successor: | none |
The Lawrance A-3 or Lawrance Model A was a two-cylinder boxer engine for powering aircraft of the US manufacturer Lawrance Aero Engine Company . It was developed by Charles Lanier Lawrance in the mid-1910s and also built under license by the Excelsior Motor Manufacturing & Supply Company . With a weight of 200 lb (91 kg ), the motor developed a power of 28 HP (21 kW ). A special feature of the machine was the crank pin shared by both cylinders , which led to undesirable vibrations, as the pistons always moved in the same direction.
Applications
- Breese Penguin (non-airworthy device for roller training on the ground)
- Driggs darts
- Mummert Cootie
- Shinnecock lightplane
- Swanson SS-3
- Waco Cootie I
- Waco Cootie II
Issued copies
- A Lawrance A-3 is on display at the Aerospace Museum of California
Web links
Commons : Lawrance A-3 - collection of pictures, videos and audio files
Individual evidence
- ^ A b Bill Gunston: World Encyclopaedia of Aero Engines . Patrick Stephens Limited, Cambridge, England 1989, ISBN 1-85260-163-9 , pp. 92 (English).