FPV Camera Protractor

This FPV camera protractor minimizes errors when adjusting camera angles during installation. Precise camera angles are crucial for consistent flight performance. Differences between your new FPV camera and your usual drone can significantly alter the feel of flight.
This protractor consists of a main body, base, carbon fiber rod (3mm diameter, minimum length 15cm, to be purchased separately), and a camera sleeve (19mm diameter). The carbon fiber rod, inserted into the camera sleeve, indicates the viewing angle. The protractor body features numerous recesses on either side and a central square hole to assist with angle measurement. The starting angle is 10 degrees, increasing by 5 degrees incrementally.
After attaching the camera sleeve, mount the protractor to the base to measure the angle. The carbon fiber rod can be secured in the side recesses or inserted into the central hole. This allows you to maintain the desired camera angle, for example by fixing the rod to a specific angle before tightening the camera screws.
Refer to Figure 1 for a general understanding of usage.

Tips:
1. Maintain a level base during measurement; tilting will introduce significant errors. Note that because the camera sleeve is made of flexible TPU, the indicated angle cannot be guaranteed as 100% accurate.
2. Mark your frequently used angles on the print using a contrasting color pen.
3. The base can be used horizontally or vertically to accommodate drones of different heights, although compatibility might not be universal.
4. The protractor resembles a magazine, and when printing, lay it horizontally. Due to the minimal contact area with the print bed, warping is possible. I recommend heating the glass bed to 60 degrees Celsius and applying glue stick before printing.
Alternatively, consider a digital protractor for ease of use, accuracy, and convenience, although it requires a battery. This protractor's primary benefit is its battery-free operation. This design might be superfluous; use it at your discretion.