Make a Lightweight Switch

This jack switch is ideal for a small
sailplane or a park flier. The miniature
switch weighs one gram, and is used
as an on/off switch and a battery-charging
connector.
You turn the switch on by removing a
small external telephone plug, and turn it off
by inserting the plug.
The onboard batteries can be charged
when a battery charger is connected to the
plug. Having the charge connector
accessible on the outside of the fuselage can
be a real advantage—especially if the
fuselage is packed full of electronics.
Standard connectors are wired to the
switch, allowing the receiver or battery to
be removed easily.
The jack switch and its telephone plug
can be purchased by mail order for $1.50,
excluding return postage.