You may notice from the preceding image that the motor only has two-wires. This is because it's a brushed motor. In the last chapter, we discussed brushed versus brushless motors. A brushed motor requires an entirely different type of ESC. Why is this important? Because (unfortunately) the receiver for our original boat had an integrated ESC. So, we'll need to dig out a new brushed ESC for our motor. While the intern is doing that, let's install our newly printed rudder.
First, we created a block that fits on the back of our duck with the male end of a hinge on it. Then, a simple rudder with a control arm on it (so that as the servo pushes a control rod, the rudder will turn). Mounted, it looks like the following image:
On the inside, we glued our electronics platform into place, drilled a hole (well above the water line) for our control rod. The rod can't be encumbered by silicone, so this hole will leak if water rises to this line. So, we wanted it as high as possible...