Power Pod - Construction

One of the most important components of a windtunnel, the power pod for an open-circuit suck-type windtunnel sits at the outlet of the diffuser. In addition to this, the propeller and components we are using are build and optimised for scaled-down aircrafts. This invariably increases the quality of the flow. The instructions to build and mount the power pod are as follows:

Step 01 - Procuring Components

Since these are electronic components, review the specs available in the table above. If you find parts that have specifications near the ones mentioned above, don't hesitate using them.

Item Component Link & Price
1 Electronic Speed Controller (ESC)
Current: 30A
Battery Range: 2-3 Lipo
India - Amazon
Price - ₹500 ($6.67)
2 Lithium Polymer Battery
Style: 360mAh LiPo
Cell Count: 2-3
Voltage: 11.1 V
Max Continuous Discharge: 30C
India - Amazon
Price - ₹795 ($10.60)
3 Digital Multi Servo Tester
Style: Servo & ESC
India - Amazon
Price - ₹237 ($3.16)
4 Brushless DC Motor
KV: 1400
Battery: 3S LiPo
India - Amazon
Price - ₹500 ($6.67)

Power Pod Components

Step 02 - Mounting the Motor

Tracing the Motor Mount

Drilling Mount Holes into the Ply

Attaching Motor to Mount and Ply

Step 03 - Joining the electronics and securing them

Connect the bullet connectors on the motor to the ESC's bullet holes.
Connect the ESC's JR Connector to the Servo Tester. The knob on the servo tester will control the power to the motor.
When you're running the motor, connect the other end of the ESC to the battery. At all other times, the connection to the battery must not be made.

The electronics must be secured to the rear of the plywood strip, away from the face of the motor. Orientations vary according to the length of your wires. An example is shown in the image. Once you've found the orientation, secure the components with fibre-glass tape - make sure nothing is in line of the propeller.

Electronic Component Connections

Power Pod Electronics Orientation

Step 04 - Mounting Power Pod to Diffuser

This is a fairly straight forward step. To the plywood strip, apply epoxy at the ends that touch the outlet walls of the diffuser. Gluing materials with epoxy takes a couple of steps. Hold the power pod in position until it dries. Test the motor on low power and make any adjustments if required.