Otto A.G.O. 70 hp
| Industry | Aerospace |
|---|---|
| Founder | Gustav Otto |
| Headquarters | Germany |
The Otto A.G.O. 70 hp aircraft powerplant was a six-cylinder, water-cooled inline engine produced by the German firm Gustav Otto Flugmaschinenwerke.
Design and development
The 70 hp Otto A.G.O. (Aeromotor Gustav Otto) was an evolution of the earlier four-cylinder 50 hp model, engineered by Hans Geisenhof at the Gustav Otto Flugmaschinenwerke. Retaining the fundamental architecture, it featured identical bore and stroke dimensions of 110 mm × 150 mm (4.33 in × 5.91 in) and delivered approximately 70 hp (52 kW) at 1,200 rpm.[1] [2]
Each cylinder was individually cast from iron and then precisely machined. These cylinders were assembled into a unified block by connecting their cooling jackets with flanges and bolts. The engine utilized two side valves per cylinder, actuated by a camshaft positioned on the left side of the block, which received its drive from the crankshaft through spur gears. The combined cylinder assembly included a singular intake passage running within the water jackets. Positioned centrally on the engine were two Cudell-G.A. carburettors, which supplied air-fuel mixture into this intake channel from both ends via a shared intake pipe. This pipe and the carburettors were enclosed within heating jackets integrated into the coolant circuit to maintain temperature. Each cylinder was fitted with one spark plug, while the magneto was mounted on the control side of the engine and driven from the crankshaft through an intermediate spur gear.
The crankshaft found support through two intermediate plain bearings and two outer plain bearings, complemented by two thrust ball bearings at the propeller end. Lubrication was achieved by pressure feed, with an oil pump supplying lubricant directly to the crankshaft bearings.[2]
Specifications
See also
References
Bibliography
- Angle, Glenn Dale (1921). Airplane Engine Encyclopedia: A Comprehensive Alphabetical Compilation of Global Aircraft Engines. Otterbein Press. pp. 372-373. OL 23525261M.
- Quittner, Victor (May 1912). "Die Flugmotorern auf der „ALA"". Der Oelmotor (in Deutsch). I. Jahrgang 1912/13 (2). Berlin: Verlag für Fachliteratur G.m.b.H.: 96–101. OCLC 2449244.