RC biswitch:

The RC switch is a well-known and very popular adjunct in the world of model craft. It makes it possible to use the joystick for operating a given on-board function such as a search light, siren or winch at the same time as it is controlling the speed of the craft. The switch described in this article is a dual model provided with a memory. This duality and the memory offer the keen modeller a number of interesting applications.