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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Point taken…..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I’ll add some context……in
practice, with any reasonably sized electric motor for pattern, there is no
power limit.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Even if the weight limit were raised…I
don’t think you’d see anyone trying to run a DA200 or Plett
Terminator.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Noise is still the practical limit for
both electric and IC…and that limit becomes increasingly hard to meet as
power increases (with electric or glow).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dave<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Chad Northeast<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, August 20, 2010 9:59
AM<br>
<b><span style='font-weight:bold'>To:</span></b> General pattern discussion<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion]
Question.</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Dave,<br>
<br>
I don't believe that is entirely correct, there is a limit to the amps on
motors, either through saturation or through losses in the windings.<br>
<br>
I am not an expert but what I have been told is there is a point at which
torque begins to decrease with increasing amps beyond which point your power
out drops with increasing power in.<br>
<br>
So in effect we are "limited"<br>
<br>
<st1:country-region w:st="on"><st1:place w:st="on">Chad</st1:place></st1:country-region><br>
<br>
----- Original Message -----<br>
From: Dave <DaveL322@comcast.net><br>
Date: Friday, August 20, 2010 7:14 am<br>
Subject: Re: [NSRCA-discussion] Question.<br>
To: 'General pattern discussion' <nsrca-discussion@lists.nsrca.org><br>
<br>
> "Power" of an IC engine is generally related to <br>
> displacement...but not<br>
> exclusively..more RPM at the same displacement equals more power.<br>
> <br>
> <br>
> <br>
> Electrics are limited on voltage only.there is no limit on amps.both<br>
> contribute to power, so there is no limit on electrics.<br>
> <br>
> <br>
> <br>
> The limiting factor in pattern is really the noise limit, for <br>
> both IC and<br>
> electric.<br>
> <br>
> <br>
> <br>
> Regards,<br>
> <br>
> <br>
> Dave<br>
> <br>
> <br>
> <br>
> <br>
> <br>
> <br>
> <br>
> _____ <br>
> <br>
> From: nsrca-discussion-bounces@lists.nsrca.org<br>
> [mailto:nsrca-discussion-bounces@lists.nsrca.org] On Behalf Of <br>
> Tim Taylor<br>
> Sent: Thursday, August 19, 2010 3:13 PM<br>
> To: nsrca-discussion@lists.nsrca.org<br>
> Subject: [NSRCA-discussion] Question.<br>
> <br>
> <br>
> <br>
> <br>
> 4. Model Aircraft Requirements: <br>
> <br>
> 4.1: Propulsion source limitations: Electrically-powered model <br>
> aircraft are<br>
> limited to a maximum of 42.56 volts for the propulsion circuit, <br>
> measuredprior to flight while the competitor is in the ready <br>
> box. <br>
> <br>
> <br>
> <br>
> I see Electrics have a "Displacement" limit, why are they <br>
> limited and the IC<br>
> engines not?<br>
> <br>
> <br>
> <br>
> I also see they must be checked in the ready box prior to each flight,<br>
> anyone ever have this check done? Even at the worlds?<br>
> <br>
> <br>
> <br>
> Or is this another ignored rule?<br>
> <br>
> <br>
> <br>
> Tim<br>
> <br>
> <br>
> <br>
> <o:p></o:p></span></font></p>
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