Subrotary

Subrotary is a term that can refer to a few different concepts, primarily in mechanical and engineering contexts. One common meaning relates to a type of engine where the main rotating element does not complete a full 360-degree rotation within its primary cycle. Instead, it might rotate through a specific arc, returning to a near-original position before the next cycle begins. This differs from continuously rotating engines like typical internal combustion engines. Subrotary engines can be designed for specific applications where a limited, precise range of motion is advantageous, potentially offering benefits in terms of packaging or efficiency for certain tasks.

Another application of the term "subrotary" might be found in describing gears or mechanisms where a component rotates, but its movement is restricted or part of a larger, non-continuous rotational system. For instance, a subrotary valve might only turn a portion of a circle to open or close a passage. The exact nature and functionality of a subrotary system are highly dependent on the specific engineering design and its intended purpose. While not as common as fully rotary systems, subrotary mechanisms are employed when their unique operational characteristics fulfill particular design requirements.