Start with what changed
A new sound or vibration after an impact, a propeller change, or a repair is useful evidence. Write down when the behavior began and which physical parts were disturbed. Compare that with a known-good state if you have one.
Do not keep flying a suspect aircraft to collect increasingly convincing evidence. Inspect it and follow the equipment’s documented test procedures. Unusual heat, loose components, or visible damage deserve attention before another flight.
Inspect the obvious carefully
Check propeller condition, mounting, orientation, and compatibility with the intended setup. Look for damage or contact that is easy to miss at a glance. Inspect motor mounting and visible obstructions without placing fingers near powered moving parts.
A component can be securely attached yet still have the wrong orientation or specification. Use the actual motor layout and propeller direction information for the configured aircraft, not a generic diagram remembered from another build.
Separate four different questions
The flight controller’s orientation, motor order, motor direction, and propeller installation are separate checks. An aircraft that reacts violently at takeoff may have a configuration or assembly problem in one of these areas. Replacing a random part is not a complete diagnosis.
Follow the official setup and motor-check procedures with propellers removed where required. Do not bypass protective features to force a test flight. Confirm that the physical aircraft and the displayed configuration agree.
Tune only after the basics are credible
If the hardware and core configuration have been checked and the issue remains, collect the relevant observations and use the documentation appropriate to your firmware. A controlled tuning process needs a clear question, a repeatable observation, and a record of changes.
“More aggressive” is not a diagnosis. A healthy setup is a better starting point for learning than a heavily adjusted one whose original problem was a chipped propeller.
MAKE IT USEFUL
Your next small job.
Compare the current aircraft with its motor-layout documentation. Record mechanical findings before changing any tuning values.
Go straight to the source.
These official resources support the next step. Hardware, firmware, and local requirements can differ.