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Opposed Piston Engine

Opposed Piston Engine

Ref: MR-MM-7

Opposed-piston engines were mainly built in the 30- 50s. The British Deltic and the Junkers aircraft engines were particularly interesting constructions.

Newer designs are OPOC, Goole, Pinnacle, Achates Power, Laukötter among others. Almost all engines were, or are, two-stroke diesel engines.

The presented model engine is a four-stroke engine with two cylinders and crankshafts which are connected by a toothed belt. The pistons run opposite to each other and therefore run smoothly.

Thanks to hardened pistons and cylinder liners the engine needs little lubrication; lighter gas is used as fuel and therefore the engine is almost free of exhaust gases.

The piezoelectric ignition is driven by the camshaft or flywheel shaft.

The start takes place by rotation of the flywheel.

The engine consists largely of anodized aluminum and nickel-plated brass.


model opposed-piston engine MM-7

rotation speed control via valve on the gas tank

crank shaft 2-fold ball bearing mounted

cylinder capacity twice 1.5 cm³

rotation speed 300-1,500 rpm

ignition piezo high voltage ignition

running time 10 min/tankful (idling mixture)

height × width × length 180 mm × 230 mm × 140 mm

weight 3,400 g

Total Price$999.95

Click on This Text for Instruction PDF File for the MM7

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