Lessons Learned from the Flight Tests: Overcoming Challenges. Part 1
- Elena Karpovich
- Jul 5, 2025
- 2 min read
Flight testing a drone is an exciting but often unpredictable process. Each test reveals new challenges and teaches valuable lessons. Here are some key problems I encountered during our drone first flight tests and how I solved them.
1. Drone Turnover Due to ESC Mismatch
Problem: During initial tests aiming just to get into the air, the aircraft turned over. The issue was traced back to a mismatch in ESC (Electronic Speed Controller) settings.
Solution:
Initially, I struggled to access the ESCs through the Matek H743 Slim flight controller.
As a workaround, I used an Arduino to access and configure the ESCs, which required me to:
Learn how to use Arduino for ESC communication.
Get plenty of practice in soldering connections.
Later, I discovered that the flight controller could access the ESCs by using special settings, simplifying future adjustments.
Lesson: Sometimes, temporary solutions (like using Arduino) lead to unexpected learning opportunities. Persistence pays off, always check the settings of your ESCs!
2. Uncontrolled Altitude Surge in QLOITER Mode
Problem: The first time I tested an altitude-controlled mode (QLOITER), the drone unexpectedly shot upward and crashed.
Root Causes:
In altitude-controlled modes (like QLOITER), the throttle stick controls altitude gain rather than direct motor power.
My throttle channel’s mid-position was incorrectly set to 980 PWM (instead of the usual 1500). A slight stick movement caused a drastic altitude change.
With limited space in our testing area, I had to disarm mid-air from about 15 meters, leading to a crash.
Solution:
Recalibrated the throttle channel to ensure proper PWM range (1000-2000).
Lesson: Always verify control mappings and channel calibrations before flight, especially when switching modes.
Testing in a safe environment is crucial!
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