I have built an electric powered scale model torpedo for my 60" British PT boat. I need to figure out how to use a relay to turn on the torpedo motor as it leaves the launch tube. The perm. magnet is glued to bottom of launch tube. Magnetic reed switch is inside torpedo. I have a magnetic reed switch which can handle 1 amp and want to use it to energize the relay coil to switch on the 6VDC 11 amp draw motor. I have a SPDT PC relay to do the switching. My question is how do I power the coil circuit which uses the magnetic reed switch to turn on the torpedo motor. I fried the first reed switch by wiring it directly in the motor circuit. The motor is a Graupner Speed 300 6VDC little motor (1/2" dia 1" long) and it draws a max of 11 amps. Power comes from 6 AAA alkaline Duracell batteries wired in series. Am I missing something on how the coil is powered. The coil specs are: Nominal 12VDC, Nominal coil current 30mA, Pickup/dropout voltage 9.0/0.6VDC. The torpedo is 1.25" ID so things must be very small. See the boat and a video at: web.me.com/hookpilot. Current pictures of torpedo on my FaceBook page for Michael Jones.