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HomeIndustry NewsTake a look at this wild single-cylinder rotary engine.

Take a look at this wild single-cylinder rotary engine.

An American company, AVADI, has created an innovative sort of rotary piston engine that is incredibly lightweight and could be suitable for a variety of applications.

The rotary piston engine is a modest 250cc prototype with conrods, unlike a standard (if you can call it that) rotary engine. It has a single-cylinder design and two conrods. Avadi describes the engine’s design as a “single-cylinder with a self-centering rotating piston connected to a pair of counter-rotating, self-balancing connecting rods.” The connecting rods’ scissor-like action efficiently transfers the piston’s vertical stroke into rotational movement without a traditional crankshaft-based engine. This puts less side strain on the cylinder wall and reduces friction, heat, and wear.

avadi rotary engine
Avadi 250cc Rotary Engine

Working principle

As the piston moves, the two rods travel in a scissor-like pattern, with each rod individually coupled to a pinion gear at the bottom end, which rotates on a fixed ring gear attached to the crankcase. The ring gear is the only non-rotating major mechanical component. The piston, cylinder, and connecting rods all rotate. These two connecting rods and their matching pinion gears are housed in what Avadi calls a ‘half shaft,’ which is effectively the housing where up-and-down piston motion is transformed into a rotating motion.

Aside from its innovative internals, the rotary piston engine’s compact dimensions and lightweight may be its most significant advantages. The entire engine weighs just 10.7kg, and even in the early phases of prototype manufacture, it produces 15bhp at 3,700rpm and 22.3 lb-ft at 3,500rpm. The Avadi’s low weight and compact form make it an appealing option in the power sports, ATV, and motorcycle markets. It’s also encouraging to note that, despite a continual (and, in some cases, forced) shift towards electrification, some people are still innovating in the internal combustion engine field.

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Andrew Nelson
Andrew Nelsonhttp://www.bikersinsider.com
Andrew Nelson is an Editor at Bikers Insider, He has been a Passionate motorcycle rider since age 10, Andrew has close to a decade of Motorcycle industry experience, initially working in an online, magazine and has now transitioned into a full-time blog writer, Andrew prefers touring-style motorcycles, his favorite motorbike is Africa Twin. He is obsessed with keeping up to date with all the latest tech in the motorcycle industry, Andrew is also a keen swimmer and he can usually be found training in his local swimming pool. Words from Andrew: Beyond my love of adventure and riding a motorcycle, sharing stories and my experience with other fellow riders is another passion of mine, I hope sharing my stories and experience will inspire anyone interested in motorcycle adventures.


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