Quote:
Originally Posted by JesseK
It's funny how typing 'cement v' into google will auto complete that exact search, and yet it's the 4th link down before there's any reasonably short explanation for what the difference between the two is. And yet even after reading that simple and short explanation, I have already forgotten if concrete is used in cement or vice-versa, and which one is limestone-based vs just water and substrates.
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Since no one else has clarified for those who may not know, concrete = cement + aggregate + water.
Quote:
Originally Posted by Nemo
Maybe somebody can satisfy my curiosity here. Why would a sealed can motor survive a stall better than an open motor that can be cooled more easily? BAG and 9015 are roughly the same size and power, but BAG survives a stall for longer. Is it because it's sealed or in spite of that?
Edit: Is it the lack of oxygen?
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The 9015 (like most other open motors) is air-cooled. The motor spinning drives a fan that draws air through the body of the motor. At stall, the fan doesn't spin, so the motor doesn't cool nearly as well.
The BAG (like the CIM and the Mini-CIM) isn't cooled
per se. Rather it's case has a high thermal mass and the internals can take more heat than the internals on an air-cooled motor.