Oct 21, 2004, 10:04 AM Alphabandaid Marshfield, Wisconsin, United States Joined May 2003 1,259 Posts Formula for Watts? Watt is the formula for measuring wattage? I'm attempting to teach myself the relationships of the variables involved.
 Oct 21, 2004, 10:07 AM me move stick helicopter go up Algonquin, Illinois, United States Joined Oct 2003 33 Posts Here's a great tool: http://www.angelfire.com/pa/baconbacon/page2.html
 Oct 21, 2004, 10:31 AM Registered User Fort Worth, Texas Joined Dec 1996 1,611 Posts Watts = Volts * Amps
 Oct 21, 2004, 02:47 PM DVA Chandler, AZ Joined Jul 2004 303 Posts mecanical watts are Power= 2*pi*rpm*T/60 [W] T in N-m or Power= 2*pi*rpm*T*746/(60*550) T in ft-lb there is about 746 W in one hp and 550 ft-lb/s in one hp DVA
Oct 21, 2004, 02:52 PM
Registered User
London Gatwick, Great Britain (UK)
Joined Jun 2004
244 Posts
Quote:
 Originally Posted by aplphabandaid Watt is the formula for measuring wattage? I'm attempting to teach myself the relationships of the variables involved.
V=IR,P=VI.My lecturer at college once said that the use and understanding of these two apparently simple statements comprises 50% of electrical engineering,everything else comprises the other 50%.A bit of an egsageration perhaps .But you get his point once you start to dabble
I repeat. V=IR P(watts)=VI
 Oct 22, 2004, 08:59 AM Alphabandaid Marshfield, Wisconsin, United States Joined May 2003 1,259 Posts Okay, thanks. Now to see if my old brain can digest this. thanks much all.
 Oct 22, 2004, 12:12 PM Registered User Iron Mountain,MI Joined May 2002 2,272 Posts http://www.grc.nasa.gov/WWW/K-12/Sam...w/ohmslaw.html This might be of interest :-)
Oct 22, 2004, 02:24 PM
Gotta have more cowbell!!
Clawson, MI USA
Joined Sep 2002
2,171 Posts
Quote:
 Watts = Volts * Amps
If, in the odd occurance you don't know the voltage but do know the current and resistance you can still find "P" (watts). P = (I*I)*R It might be hard to apply to motors, but it works on circuits.

Mike