Abstract: A system for controlling engine crankshaft deceleration in an internal combustion engine is operable to determine whether the engine is operating with low inertia, to monitor an operational status of an engine retarding device configured to produce an engine retarding torque for decreasing rotational speed of the engine crankshaft, and to limit the retarding torque produced by the engine retarding device if the engine retarding device is operational and if the engine is operating with low inertia.

Abstract: The present invention relates to an improved double flying disc including two discs attached together in vertically stacked relation by a plurality of collapsible rings. The device is thrown with the discs adjacent one another and, during flight, the discs separate from one another as the connecting rings allow such separation until the rings are opened as far as they can open due to their interactions with one another. After the double flying disc lands, the rings collapse, allowing the discs to be adjacent one another and ready for the next throw.