The invention efficiently and effectively secures and releases a rail-launched missile. An asymmetrical secure-release wheel (70) is defined by several surfaces which extend radially outward from a pivot hole (70K). The surfaces include a wheel unlatch surface (70H), a wheel notch stop surface (70D), a wheel detent surface (70G), a clockwise stop surface (70C) and a counterclockwise stop surface (70B). The wheel (70) is rotatable within a wheel housing (72). When a missile is loaded onto the launch rail, the middle shoe of the missile engages the detent surface (70G) of the wheel. During missile launch, the plume of the missile moves a trigger (110) which pulls a connecting rod (52) aft which results in a wheel lock (78) being disengaged from the detent surface (70G). A microswitch (56) provides a signal indicating whether the wheel (70) is in a latched or unlatched state.