Progress on Electronic Speed Control Research

Last night, I was cleaning up my work space and found the RF receiver that was used in the old quadcopter that was used for parts. I noticed the receiver had 6 channels and 6 rows of pins. Each row had 3 pins. 3 pins is how I do PWM... (Signal, GND, +5v)
It would make sense to send all signals from part to part all using the same protocol. After all, these parts are used by aviation enthusiasts. They probably don't want to waste a bunch of time converting from one protocol to the other...
After some Youtube research, I found some content that suggested I was right. I hooked up the receiver to the motors and powered everything. I could then move the remote joysticks and spin up the motors individually! Now we're getting somewhere! Since they can only spin one direction, I took this opportunity to rewire the motors so they spin the right way. This diagram helps to show the correct rotation direction for each motor.

I still need to figure out what pwm signals are being sent to control the ESC's. I would also like to figure out if there is any kind of boot-time calibration that happens. It seemed like each motor had a different max speed as well but that might have something to do with the way I have been Jerry-rigging the motors to the receiver...

Here are the results of this work: