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betaflight tune on my new prebuilt feels sluggish, not sure if its the rates or the pids

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yeah this has been bugging me since i got it last week. picked up a geprc mark5 hd cause i wanted something i could slap an o3 on and not spend a month building. thing flies but it just feels kind of mushy, like inputs are there but there's this lag or softness that i dont get on my custom 5inch. hard to describe exactly

ran blackbox on a short pack yesterday and the p term looks like its doing something weird on roll, like its oscillating slightly but its not visible in the video its just in the log. not sure if the default filter settings are too aggressive and killing the response or if i just need to up the rates. currently flying on the stock profile they shipped with, havent changed anything yet because i wanted to baseline it first

anyone tuned one of these or know what geprc usually ships them with? im on 4s 1550 which is what it came with

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  • build_fly_crash
    build_fly_crash

    that mushy feeling on prebuilts is almost always the filtering being too conservative, geprc tends to ship with rpm filter on and a pretty heavy lowpass stack which makes sense for warranty reasons i

  • quad_builder_tom
    quad_builder_tom

    i had the same thing with a prebuilt i got, turned out my rates were just way lower than what im used to so everything felt slow even though the quad itself was fine lol. worth checking that before yo

Solved by Tyler Brown

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that mushy feeling on prebuilts is almost always the filtering being too conservative, geprc tends to ship with rpm filter on and a pretty heavy lowpass stack which makes sense for warranty reasons i guess but it kills the feel. first thing id do is go into the filtering tab and back off the gyro lowpass a bit, try moving it from like 100hz up to maybe 120 and see if that sharpens things up. also check if dynamic idle is set, sometimes that messes with the feel in ways that arent immediately obvious

the p term oscillation youre seeing in blackbox could also just be from the filtering delay causing the loop to react late. fix the filters first before touching pids otherwise youre just chasing your tail

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i had the same thing with a prebuilt i got, turned out my rates were just way lower than what im used to so everything felt slow even though the quad itself was fine lol. worth checking that before you go deep into the pid stuff honestly, saved me like an hour of confusion

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