Vertical Robotics Competition
  • Welcome to VRC!
  • Before We Get Started
    • Phase I Overview
    • Helpful Links
  • Primary Goal: Assembly and Configuration
    • VRC Drone Kit Contents
    • VRC Drone Assembly
      • Arms and Motors
      • Landing Gear, PDB, and Rails
      • ESCs, FC Power Module, and Receiver
      • Flight Controller Enclosure
      • Mounting the Flight Controller
      • Top Plate and Arms
      • FC and ESC Wiring
      • Propeller Adapters
    • RC Transmitter Setup
      • Basic Usage
      • Binding the RC Receiver
      • Setting the Output Mode
      • Setting Up Channels on the RC Transmitter
      • Setting Up Failsafe
    • FC Setup and Calibration w/ QGC
      • PX4 Firmware
      • Airframe
      • Sensors
      • Radio
      • Flight Modes and Kill Switch
      • Power
      • Safety
      • Motor Test
  • Sphero RVR
    • RVR Assembly
    • RVR Programming
  • Battery
    • Overview
    • Charging
    • Storage
  • Checkpoint #1: Flight Test
    • Before You Fly
    • Flight Test
    • After You Fly
  • SECONDARY GOAL: PCC
    • Laptop Setup
      • Setting Up Windows
      • Install Git Bash
      • Clone the VRC Repo
      • Install Anaconda
      • Install VS Code
      • Install SD Card Formatter
      • Install Balena Etcher
      • Install PuTTY
      • Install QGroundControl
    • Peripheral Control Computer (PCC)
      • Physical Assembly
      • Video Tutorial: Flash & Test PCC
      • Flash the PCC
      • Test the PCC
  • Overachiever Goal
    • Vehicle Management Computer (VMC) Setup
      • Preparing the Jetson
      • Flashing the SD Card
      • First Boot
  • 3D Printing Project
    • Project Overview
    • Sr. Design Project
    • Rotor Guards
  • Diving Deeper
    • Control Loops
    • Glossary
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  1. Primary Goal: Assembly and Configuration
  2. VRC Drone Assembly

Propeller Adapters

PreviousFC and ESC WiringNextRC Transmitter Setup

Last updated 4 years ago

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The propeller adapters are what we will use to attach the propellers to the motors. In each motor box there are two adapters provided and it's important for us to determine which adapter to install on each motor.

As covered earlier in the previous section, motor rotation is of the utmost importance. Motors can spin in one of two directions:

  • Clockwise (CW)

  • Counterclockwise (CCW)

Previously we connected the ESCs to the servo rail in the necessary order. The image below shows the proper rotation of each motor/propeller. Motors 1 and 2 (blue) rotate in a CCW direction while Motors 3 and 4 (green) rotate in a CW direction.

The prop adapters are right-hand and left-hand threaded and marked underneath with RH-6 and LH-6. The number 6 represents the diameter of the shaft in millimeters.

For motors 1 & 2 we will mount the RH-6 adapter, which interfaces with CCW rotating propellers (silver cap). Motors 3 & 4 will use the LH-6 adapter, which interfaces with CW rotating propellers (black cap).

Make sure the front of your VRC drone is oriented correctly before mounting! Double-check that it is consistent with the rotation diagram above as you look down on your drone.

Each prop adapter requires four screws for mounting. Each motor box contains several screws. Use the shorter screws with the button head as shown in the photo below.

Do not overtighten as you do not want to risk stripping the head of the screw. Removing stripped screws is not fun and may even require the replacement of the motor.

Mount all four prop adapters and then add one of the provided aluminum washers on each of the four shafts. The washers come in a separate bag and are necessary to make sure the propeller is nicely seated on the adapter.

It is good practice to check the prop adapter screws before each flight. Simple pre-flight checks can prevent catastrophic failures while in the air.

The photo below shows the propeller nicely seated onto the prop adapter and aluminum washer.

Let's wrap up this section by mounting all four propellers and make sure we have them in the proper orientation.

The CCW rotating propellers have silver caps and are attached to motors 1 & 2. The CW rotating propellers have black caps and are attached to motors 3 & 4.

After verifying the correct orientation you should remove all propellers before moving onto the next section. While the drone assembly is complete, we still have some configuration to do before our initial flight test.

We want to reinforce the importance of keeping propellers off your VRC done while on the bench or performing maintenance. Only attach propellers when the area is clear and you are ready to fly.

Motors 1 & 2 = CCW rotation, Motors 3 & 4 = CW rotation
Each motor comes with a right hand (RH) and left hand (LH) prop adapter
CW (black cap) and CCW (silver camp) propellers
Prop adapter mounting with button head screws
Aluminum washer on prop adapter
Propeller and aluminum washer on prop adapter
All propellers mounted