Internal-combustion engines – Multiple cylinder – Cylinders radiating
Patent
1988-11-28
1991-04-02
Okonsky, David A.
Internal-combustion engines
Multiple cylinder
Cylinders radiating
123DIG1, 123DIG3, F02B 7522
Patent
active
050039350
ABSTRACT:
A low cost multi cylinder radial aircraft engine is composed of an even number of individually functional, single cylinder slider crank model engines. They are mounted to a plate to form equally spaced radially oriented cylinders. In the preferred embodiment, use of standard, low cost, & mass produced two cycles engines are used. This in conjunction with a novel exhaust muffler and throttle mechanism results in a low cost radial engine. The individual engine shafts surround and are parallel to a central output shaft. Pinion gears on each shaft transfer power to a larger sun gear on the output shaft. This gearing synchronizes opposed pistons to reach top dead center at the same time resulting in vibration free piston motion and perfect balance of the entire engine. Said gearing also provides speed reduction for use of large diameter scale propellers. A rear mounted throttle mechanism controls individual carburetor throttles. Each cylinder radially exhausts into a donut shaped exhaust manifold that also serves as a muffler at the front of the engine. It very effectively lowers cylinder exhaust noise by using opposed flow impingement. The muffler also utilizes turbulent gas cooling to greatly reduce exhaust gas temperature and energy. This results in very low noise like its 4 cycle competitor.
REFERENCES:
patent: 735035 (1903-07-01), Jones
patent: 2044113 (1936-06-01), Woolson
patent: 2419305 (1947-04-01), Woolson et al.
patent: 2491630 (1949-12-01), Voorhies
patent: 2618253 (1952-11-01), Angle
patent: 2671983 (1954-03-01), Roehrl
patent: 3308797 (1967-03-01), Buyatti
patent: 3734072 (1973-05-01), Yamda
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