Replies

  • We found that only orignal 3dr pixhawks dont have problems with below 0 temperatures. We tested it even under -20'C. Chinese pixhawk copies often doednt want to pass initialization below 0. 

    its good idea to carry batteries in pants pockets ;) before flight during winter flights.

  • Our chief electronics engineer just told me that each autopilot should be calibrated individually. This requires a thermal chamber. I'm sure that manufacturers of inexpensive autopilots do not do this.

  • From formal point of view Pixhawk (at least old one manufactured by 3DR in past) uses components rated for industrial range from -40°C.

    It seems that root of problems is in thermal calibration of sensors. Sensors should be calibrated for whole range of working temperatures and I suppose that they calibrated for "normal" temperatures only.

    This stuff is outside of my knowledge but I saw lot of problems with our fleet (>50 drones of different makes) in low temperatures.

  • I've flown hexa Pixhawk that was overnight in  car at -15..20  , worked just fine, both that, and 3DR radios and video tx. 

  • From our experience -10 °C is absolute minimum for all Pixhawk varietes what we had in hands. The same for ESCs from different manufacturers. And for DJI avionics too.
    You can use you drones below -10, but you should do all preparations in your car/house and don't left your drone outside longer then couple of minutes.

  • I am in Canada. Currently the temperature is about -10˚C. It works well. The battery itself can produce heat during flight. A high discharge rate battery is recommend to lower the voltage drop. Also you can wrap the battery with some warm clothes.

  • Joshua - did you ever get an answer to your question regarding the Pixhawk components operating in the cold?

    Thanks

    Bret C

  • Hi, I have the same question and can't find the direct answer. So I have checked datasheets of some core components and their low operating temperatures are -40°C.

    However there are lot of other components that I didn't check and some of them may not operate at such a low temperature.

    So in general I would recommend to not operate at temperature lower than 0°C (which is guaranteed by all the modern RC components).

This reply was deleted.

Activity

DIY Robocars via Twitter
RT @a1k0n: @DanielChiaJH @diyrobocars @circuitlaunch Here's my car's view of that race. About 8.4 second lap times for laps 2 and 3... both…
yesterday
DIY Robocars via Twitter
RT @DanielChiaJH: Great racing against @a1k0n today at @diyrobocars! Pretty cool to both break sun-9s at the track today I think I got very…
Sunday
DIY Robocars via Twitter
Broadcasting the @circuitlaunch race live now at https://m.twitch.tv/diyrobocars Races begin around 2:00pm PT
Saturday
DIY Robocars via Twitter
RT @a1k0n: ran a huge number of hyperparameter tuning experiments yesterday; now I can train a new policy, far with better quality, in 15 m…
Saturday
DIY Robocars via Twitter
RT @a1k0n: Did I get rid of hand-tuned parameters? Yes. Am I still hand-tuning more parameters? Also yes. I have a few knobs to address the…
Sep 26
DIY Robocars via Twitter
RT @a1k0n: I'm not going to spoil it, but (after charging the battery) this works way better than it has any right to. The car is now faste…
Sep 26
DIY Robocars via Twitter
RT @a1k0n: Decided to just see what happens if I run the sim-trained neural net on the car, with some safety rails around max throttle slew…
Sep 26
DIY Robocars via Twitter
Sep 24
DIY Robocars via Twitter
RT @SmallpixelCar: @a1k0n @diyrobocars I learned from this. This is my speed profile. Looks like I am too conservative on the right side of…
Sep 24
DIY Robocars via Twitter
RT @a1k0n: @SmallpixelCar @diyrobocars Dot color is speed; brighter is faster. Yeah, it has less room to explore in the tighter part, and t…
Sep 24
DIY Robocars via Twitter
RT @a1k0n: I'm gonna try to do proper offline reinforcement learning for @diyrobocars and throw away all my manual parameter tuning for the…
Sep 23
DIY Robocars via Twitter
RT @circuitlaunch: DIY Robocars & Brazilian BBQ - Sat 10/1. Our track combines hairpin curves with an intersection for max danger. Take tha…
Sep 22
DIY Robocars via Twitter
RT @SmallpixelCar: Had an great test today on @RAMS_RC_Club track. However the car starts to drift at 40mph. Some experts recommended to ch…
Sep 11
DIY Robocars via Twitter
RT @gclue_akira: 世界最速 チームtamiyaのaiカー https://t.co/1Qq2zOeftG
Sep 10
DIY Robocars via Twitter
RT @DanielChiaJH: Always a good time working on my @diyrobocars car at @circuitlaunch. Still got some work to do if I’m to beat @a1k0n howe…
Sep 10
DIY Robocars via Twitter
RT @SmallpixelCar: My new speed profile for @RAMS_RC_Club track https://t.co/RtLb7TcgIJ
Sep 10
More…