hankster
11-07-2005, 10:15 AM
When you start racing RC drag cars you'll find out that one of the requirements is a quick disconnect switch. This is used for safety so that your car can be quickly shut down if the throttle would happen to switch wide open. If you've ever seen a 12 cell Top Fueler screaming with a stuck throttle, you'd know why this safety feature is required.
When building my first rail I found that there is limited space to fit a CutOff switch. With a little bit of thinking I was able to come up with this switch that was easy to build, uses off-the-shelf parts and used very little room.
The heart of the CutOff switch is a Deans Ultra Plug. Many RCers use them to connect their batteries, but we used it in a different way to construct the switch.
I used Shoe-goo to attach the female end of the Deans Plug to the rear pod of the BoLINK Econorail. The male end of the plug had a wire soldered across the two connectors and a small tie-wrap was fished between the wire and the plug body to make a nice "tail" to grab in case it needed to be unplugged quickly.
The wiring was neat and easy. The wires were short to keep resistance low and they are tucked out of the way to keep the rail easy to work on. Below is the wiring diagram for the switch.
When building my first rail I found that there is limited space to fit a CutOff switch. With a little bit of thinking I was able to come up with this switch that was easy to build, uses off-the-shelf parts and used very little room.
The heart of the CutOff switch is a Deans Ultra Plug. Many RCers use them to connect their batteries, but we used it in a different way to construct the switch.
I used Shoe-goo to attach the female end of the Deans Plug to the rear pod of the BoLINK Econorail. The male end of the plug had a wire soldered across the two connectors and a small tie-wrap was fished between the wire and the plug body to make a nice "tail" to grab in case it needed to be unplugged quickly.
The wiring was neat and easy. The wires were short to keep resistance low and they are tucked out of the way to keep the rail easy to work on. Below is the wiring diagram for the switch.