[NSRCA-discussion] Question.

[Atwood, Mark]

I can't answer the "checking" question, as I have never had mine checked, but I "think" I was told they did at the worlds.  As to why the limit on voltage, that's simply a safety issue.   40V dc is generally accepted as the threshold for non-lethal dc voltage.  Your skins natural resistance will prevent enough current from going through you at that voltage to kill you (though as many have experienced, it can burn the crap out of your fingers).   That said, if you had electrodes poked through the skin, it could still toast you.

There has been talk about raising that limit to accommodate 12s batteries which FAI has done for the Heli F3C competitions.  I doubt you'll see it go above that.   I'm actually surprised that the AMA hasn't put an upper limit (or maybe they have and I'm unaware) for the same safety reason.

I can only imagine what a good old fashioned electrocution would do for our image.   Big bird fun fry...



Mark Atwood
Paragon Consulting, Inc.  |  President
5885 Landerbrook Drive Suite 130, Cleveland Ohio, 44124
Phone: 440.684.3101 x102  |  Fax: 440.684.3102
mark.atwood at paragon-inc.com<mailto:mark.atwood at paragon-inc.com>  |  www.paragon-inc.com<http://www.paragon-inc.com/>

From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Tim Taylor
Sent: Thursday, August 19, 2010 3:13 PM
To: nsrca-discussion at lists.nsrca.org
Subject: [NSRCA-discussion] Question.

4. Model Aircraft Requirements:
4.1: Propulsion source limitations: Electrically-powered model aircraft are limited to a maximum of 42.56 volts for the propulsion circuit, measured prior to flight while the competitor is in the ready box.

I see Electrics have a "Displacement" limit, why are they limited and the IC engines not?

I also see they must be checked in the ready box prior to each flight, anyone ever have this check done? Even at the worlds?

Or is this another ignored rule?

Tim


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