摘要 |
A model internal-combustion engine having a rotatable shaft driven by an engine, a propeller secured to said shaft, and a combined self-starting mechanism and propeller drive in the form of a plastic cylindrical connector mounted coaxially on the shaft with one end thereof in driving relation against the propeller, the connector including a metal hub imbedded therein, the hub being fixedly mounted on said shaft for driven rotation therewith and having a knurled end thereof bearing against said propeller to drive the same, the connector having ramp-defining walls adjacent a spring-engaging element at one of its ends, and a helically wound spring surrounding the shaft, anchored at one end to a stationary part of the engine and having a free end bearing against the ramp-defining walls of the connector with a hook formed thereon to automatically engage the spring-engaging element of the connector and thereby energize the spring when the propeller and connector are rotated in a contra-normal direction and to otherwise ride on the ramps of the connector in non-engaging relation to its spring engaging element. A drive element extending axially outwardly from the end of the connector in position to drive the propeller, if needed, may or may not be included.
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