AG0N-Gary
Captain
Flight distance : 700846 ft
United States
Offline
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My point was, don't warm it up, after you go to the trouble of cooling it down, until you calibrate it! It takes about 10-20 minutes to do the calibration, during which time, it is probably warming itself up, unless they disable the IMU heater during calibration. The idea is to calibrate it while the IMU is cold, so it doesn't take so long to get up to the calibration temperature when it is warming up. Ideally, I'd like to calibrate like I did the first time I did it cold. It was 17F outside. I set it out on the level spot and let it cool down for about an hour before, then I took the warm battery out, plugged it in and fired it up. I went back in the house so I could stay warm, leaving the bird outside, and initiated the calibrate. Warmup after that was VERY fast. More recently, I had to do it around 45 degrees, since it isn't getting as cold over night now. The idea is to do the calibration at a lower temperature than you normally fly in so you don't have to wait so long for it to warm up.
The actual temperature that you calibrate isn't as important as the fact that you do it lower than normal ambient when you fly. I just take it outside in the early morning, right before dawn, normally the coolest part of the day, and do it then. I watch the forecasts, so I can choose one of the cooler mornings of the week.
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