HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old 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.
aplphabandaid is offline Find More Posts by aplphabandaid
Reply With Quote
Sign up now
to remove ads between posts
Old 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
Eric Maier is offline Find More Posts by Eric Maier
Reply With Quote
Old Oct 21, 2004, 10:31 AM
gwh
Registered User
Fort Worth, Texas
Joined Dec 1996
1,607 Posts
Watts = Volts * Amps
gwh is offline Find More Posts by gwh
Reply With Quote
Old Oct 21, 2004, 02:47 PM
DVA
DVA
Chandler, AZ
Joined Jul 2004
293 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
DVA is offline Find More Posts by DVA
Reply With Quote
Old 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
oldphart is offline Find More Posts by oldphart
Reply With Quote
Old 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.
aplphabandaid is offline Find More Posts by aplphabandaid
Reply With Quote
Old 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 :-)
uncled is offline Find More Posts by uncled
Reply With Quote
Old Oct 22, 2004, 02:24 PM
Gotta have more cowbell!!
MTwallet's Avatar
Clawson, MI USA
Joined Sep 2002
2,169 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
MTwallet is offline Find More Posts by MTwallet
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
whats the formula for amp watts rmp to thrust paul747 Parkflyers 4 Feb 17, 2005 04:23 PM
Formula for determining cg on delta/other wings? Hodgepodge Electric Ducted Fan Jet Talk 6 Jun 27, 2002 06:14 PM
Formula for estimating flight duration??? Michael in Toronto Power Systems 4 Jun 23, 2002 07:16 PM
Formula for calculating wing area? Slope Nut Power Systems 14 May 09, 2002 02:54 AM
Formula for figuring out servo torque? Foxtrot Electric Plane Talk 2 Jun 15, 2001 04:19 PM