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Re: tachometer mystery?
What kind of car? I never really notice a difference with mine. Anyhow, an AC compressor places load on the engine, causing it to slow down. Just the same as if you there was friction in the drivetrain of your robot. It is a load, and would cause it to slow down. I am surprised you notice a difference though because for a big engine (like a car engine) and AC compressor shouldn't be too much of a load.
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Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
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