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my quad flies fine on the bench but acts weird when i actually go outside

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this has been bugging me for a couple weeks now. freshly built 5 inch, RPM filter on, betaflight 4.3, everything looks clean on the bench. motors are warm but not hot after a hover test in the garage. i go outside and within like 30 seconds of doing anything aggressive the whole thing just feels... wrong. hard to describe but its like a delay in response and it feels mushy, almost like its fighting the stick inputs.

logs show some P term oscillation kicking in around the time it starts feeling bad. temps seem fine. battery is a decent 4S 1500 liger, not ancient. i initially thought maybe vibrations from wind getting into the gyro but ive checked the standoffs and everything is snug. FC is mounted with soft grommets already.

has anyone seen something like this where indoor vs outdoor behavior is just completely different, not a signal issue either because rssi looks normal the whole time

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  • check your filtering setup, specifically whether you have any dynamic notch stuff configured that might be reacting differently to actual airflow vs static conditions. on the bench theres basically no

  • might be a battery sag thing more than a tune thing tbh. ligers are ok but if its an older pack or one thats been cycled a lot, under real load outside youll see the voltage drop way more than on a be

Solved by drone_ranger

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check your filtering setup, specifically whether you have any dynamic notch stuff configured that might be reacting differently to actual airflow vs static conditions. on the bench theres basically no aerodynamic load on the props so the vibration signature is totally different than when youre actually flying and the props are biting into moving air. ive had builds that looked perfect on the bench blackbox and then showed all kinds of noise in real flight.

also ? and this might sound dumb but ? is your vtx getting hot? had one build where the vtx was running hot and thermally throttling which caused the FC to have intermittent weirdness. probably not your issue but worth checking everything in that stack.

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might be a battery sag thing more than a tune thing tbh. ligers are ok but if its an older pack or one thats been cycled a lot, under real load outside youll see the voltage drop way more than on a bench hover. P term can start doing weird stuff when voltage sags mid maneuver because the motors cant follow the requested output fast enough. try logging your voltage during a full aggressive outdoor flight and see what its doing around the time things feel off

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