Low Vibration 20 HP Mini-RPV Engine

The recent advent of small remotely piloted aircraft as tools for both military and civilian missions has set a requirement for reliable, low vibration, compact, reciprocating engines in a power range where such engines have not previously been available. A new twin crank, geared output engine is being developed to satisfy this requirement. The special feature of this engine is its very low vibration. An analysis and the resulting balance criterion that gives this low vibration is presented.