Watt Meter,

[Scott Smith]

Appears to be just FAI.  From the FAI Sporting Code:

5.1.2  Power source limitations: Any suitable power source may be utilised
except those requiring solid propellants, gaseous or liquefied gaseous
fuels. Electric powered model aircraft are limited to a maximum of 42 volts
for the propulsion circuit.

  -----Original Message-----
  From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On
Behalf Of Grow Pattern
  Sent: Tuesday, June 14, 2005 9:15 PM
  To: discussion at nsrca.org
  Subject: Re: Watt Meter,


  Did you all know if there is a max voltage limit on electrics??? Is this
true and if so where can I find it to read??? Is it just FAI??

  Need help finding it.

  Eric.
    ----- Original Message -----
    From: ronlock at comcast.net
    To: discussion at nsrca.org
    Sent: Tuesday, June 14, 2005 3:52 PM
    Subject: Re: Watt Meter,


    Or if you want data quick and easy, the AstroFlight Whattmeter provides
a direct readouts up to 100 amps, 60volts, 6,000 watts.  Also shows the
    amps put in during charge.  It does not have an internal battery, it
needs at least 4 volts from the battery under test/charge.

    Later, Ron Lockhart

      -------------- Original message --------------

      >
      >
      > On Jun 14, 2005, at 2:13 PM, Jim_Woodward at beaerospace.com wrote:
      >
      >
      > I'm wondering what the sources are for a good watt
      > meter (for Hacker C50 14 XL setup), and an inexpensive IR temp gun
      > are.
      >
      >
      >
      > Let's see: amps times volts equals watts for DC circuits. So, if you
      > know the source voltage (with a voltmeter) and the current (using an
      > ammeter), you can determine watts. I use a digital voltmeter and a
      > Sears Craftsman 82062 DC/AC clamp meter for the respective
      > measurements. I don't know what the upper limit is for the Sears
      > clamp meter, but I have used it to measure about 50 amps. It appears
      > to be very accurate (compared with sophisticated bench measurement
      > devices) and costs less than $49.95 (occasionally $39.95 on sale).
      >
      >
      > Ron Van Putte
      >
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