# T200 Squeaing?

**URL:** <https://discuss.bluerobotics.com/t/t200-squeaing/441>\
**Category:** Thrusters and Motors\
**Created:** [August 28, 2016, 2:03pm UTC](https://discuss.bluerobotics.com/t/t200-squeaing/441 "2016-08-28T14:03:10Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![noreply](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/noreply/32/1406_2.png) [@noreply](https://discuss.bluerobotics.com/u/noreply)\
**Post date:** [August 28, 2016, 2:03pm UTC](https://discuss.bluerobotics.com/t/t200-squeaing/441/1 "2016-08-28T14:03:10Z")

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I just recently got my blue ROV2 assembled and tested. I notice that while running in air, my two vertical thrusters make a squealing noise?(the horizontal thrusters do not) Is this normal? The product info page for the T200’s state that they are all tested in air through the entire speed range so I am surprised that they make this noise. Anybody else experience “squealing” with their T200’s?

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**Author:** ![rjehangir](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/rjehangir/32/671_2.png) [@rjehangir](https://discuss.bluerobotics.com/u/rjehangir)\
**Post date:** [August 28, 2016, 2:42pm UTC](https://discuss.bluerobotics.com/t/t200-squeaing/441/2 "2016-08-28T14:42:09Z")

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Hi Jake,

Glad you’ve got your BlueROV2 built! It is normal for the thrusters to occasionally squeal when run dry in air. We test them all during manufacturing, but the squealing seems to be somewhat related to the humidity and conditions at your location. I would recommend running the thrusters in air only to test directions.

If you want to run them for longer, you can dunk the ROV in water to get the thrusters wet and lubricated.

I hope this helps. Let me know if you have any questions.

-Rusty

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**Author:** ![noreply](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/noreply/32/1406_2.png) [@noreply](https://discuss.bluerobotics.com/u/noreply)\
**Post date:** [August 28, 2016, 2:58pm UTC](https://discuss.bluerobotics.com/t/t200-squeaing/441/3 "2016-08-28T14:58:39Z")

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Thanks Rusty! Yes, I was running them to test the direction and experienced the squealing. Everything else checks out fine so I guess its time to dive!

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**Author:** ![rjehangir](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/rjehangir/32/671_2.png) [@rjehangir](https://discuss.bluerobotics.com/u/rjehangir)\
**Post date:** [August 28, 2016, 3:13pm UTC](https://discuss.bluerobotics.com/t/t200-squeaing/441/4 "2016-08-28T15:13:37Z")

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Good luck! Let me know if you run into any issues.

-Rusty

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**Author:** ![stretch](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@stretch](https://discuss.bluerobotics.com/u/stretch)\
**Post date:** [August 28, 2016, 9:59pm UTC](https://discuss.bluerobotics.com/t/t200-squeaing/441/5 "2016-08-28T21:59:52Z")

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Yup, a couple of mine squealed when I first tested them in air. Now that I’ve run the BlueROV2 in water a few times they no longer squeal.

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**Author:** ![noreply](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.bluerobotics.com/noreply/32/1406_2.png) [@noreply](https://discuss.bluerobotics.com/u/noreply)\
**Post date:** [August 29, 2016, 6:03am UTC](https://discuss.bluerobotics.com/t/t200-squeaing/441/6 "2016-08-29T06:03:28Z")

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Thanks for the info Paul.