I have some enclosed airframes and the interior can get quite warm when they’re sitting on the ground in the sun, causing the IMU temps to exceed the heater target (60C, in my case). Is there a recommendation for a maximum IMU temperature where it may become unsafe to fly if it is exceeded?
If needed, force cool the cube. Use a fan in your avionics bay. Or use a peltier, and a fan.
Do not mount the fan to the cube.
You should aim at a temperature of no more than 50 for the outside of the cube, less is better.
You don’t want the sensors going over 80 ever…
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Hello @philip
What about the barometer reading after mounting fan? Won’t it change?
If the fan is just creating some airflow, no. If the fan is moving air from different compartments, and it allows a pressure build up to occur, then yes.
Hey @philip, just wanted to reach out and see if recommendations have changed since this post was made. I’m currently investigating a use case where external air temperatures reach about 52 C, and reported IMU temps are reaching up to 75 C. Current CubePilot specifications indicate a maximum operating temperature of 55 C. Can you confirm?
That’s maximum Air temperature
We recommend you operate the heater set to 60degrees
Try not to let the heater go over 80
@philip he is saying the IMU temperature reached 75C, you suggest to set “heater” to 60C, what do you mean of “heater”? How setting it to 60C will solve the problem if the outside air temperature reaches 52C? Kindly explain how to solve this in details.
In an ambient temperature of 52, you still want the IMU to heat up fast, 60 is the target.
But after it reaches 60, the heater is no longer relevant. It won’t add to the heating anymore.
The cube however will self heat, that’s where the cooling or airflow discussion comes in.
We have run the systems much higher, and each system is tested to 70+ during testing.
But try very hard to keep the IMU below 80