MARK5 TPU PARTS

This TPU part is designed specifically for the DJI O3 Unit and uses a linear antenna with an integrated antenna receiver.
It is ideal for pilots who prefer a clean setup without a protruding external antenna, or for those flying short-range freestyle.

O3 UINT

It uses a 45mm linear antenna.

The linear antenna is secured neatly, and space has been provided to accommodate a 20 mm Velcro strap for securing the battery.

The Mark5 appears to have two versions: one where the capacitor is mounted underneath the O3 unit, and another where it is not.
Since my frame does not support mounting the capacitor under the O3 unit, I designed additional space to accommodate the capacitor while making an effort to preserve the original Mark5 carbon line.

Battery connector (XT60EW-M)

Although it may vary slightly depending on the ESC, a wire length of approximately 73–75 mm is suitable.

An M2.5 × 8 mm socket head screw is required to install the battery connector cover.

Motor cable protector

It is attached using 3M double-sided tape and reinforced with commonly used harness tape.

Receiver and lost buzzer

For receivers with a built-in antenna, slots are integrated into the part to allow secure mounting with cable ties.

The lost buzzer is positioned at the front, allowing easy access to the button even after the battery has been removed at the end of a flight.
In addition, the top hook allows the O3 Unit lens cable to be secured neatly.

(I changed my mind mid-build, so the color suddenly went from red to gold 😄)

DJI O3 Lens Protector

M3 × 15 Countersunk Screw x2

M2.5 × 6mm Round Head Screw × 4

The upper TPU part is mounted to the Mark5 carbon plate, while four small protrusions on the PETG or PLA plate act as integrated nuts.
The lower TPU part is also secured using components located on the PETG or PLA plate.

Although this approach is somewhat more complex, I designed it this way to eliminate the compression and deformation that typically occur when standard TPU parts are secured with bolts.
This design choice is the key highlight of this build.

Power wire protective cover

M3 × 10mm Round Head Screw × 2

Since crashes where the drone falls backward are fairly common during flight, I designed a separate cover to protect the wiring.

Motor protector

The motor protector was designed to protect the motor can itself; however, during development it tended to become too heavy.
To address this, I focused on reducing weight as much as possible. Although the resulting structure became quite complex and raised some concerns for TPU printing, testing confirmed that it prints well even without supports.

M3 × 15 Countersunk Screw x16