In the last post about my quad construction, I built the basic part of the frame, attaching the arms to the plywood plate that makes up the body of the quad. This post continues from there, as I add the motor mounts to the frame.
For the motor mounts, I went to the craft store where I picked up the wood used to make the frame, and picked up a small sheet of 1/4″ thick basswood. I cut out four small squares from the sheet with a miter saw, each a little bigger then the motor mounts. I then marked the center of each with a line in the middle, and did the same on the arms of the quad.
I used the lines to line up the wood motor mount plates, then centered the aluminum motor mounts using the lines and eyeballing. I then held it together with finger pressure while I drilled two holes down through the wood plate and the quad arm, using the metal mount as a guide.
After I drilled the two holes, I marked the arm and the plate with a number and an arrow, so they went back on in the same location, as slight variations while hand drilling can mean a mount drilled on one arm may not fit on another. The holes were then drilled out with a bigger drill bit, to allow an M3 bolt to fit through.
I then glued the wood plates onto the arms, using the metal motor mount, and two M3 nuts and bolts to clamp it in place for about 30 minutes, then removed the bolts so they didn’t get stuck, and let it dry overnight. In the morning, I put the metal bracket back in, and used it to drill out the other two holes, and a hole in the middle for the motor shaft.
At this point, I took my motors and used removable blue locktight to mount the mounting accessory kit to my motors. Well, three of them, anyway. I’m not sure where the fourth kit is, right now.
I know where the mount for the forth motor is, just not the propeller mount, washer, bolt, and the mounting screws.
The mounting plate is mainly held on by the glue, although the bolts do provide a little bit of backup, but the main purpose of the bolts is to hold the motor in place, and allow it to be removed. The nuts are not yet secure, when I balance the motors and props, I will use locktight on the nuts as well. A lose screw or nut could make for a very bad day!