30C is more than enough, you can get away with 25 or even 20C continuous rating, with the burst rating typically 1.5 - 2x the continuous rating. The fact is, in a typical sequence you are very rarely at full throttle so your discharge is very rarely above 20C. I fly sportsman with a Hacker Q60-F3A (210Kv) and a 21x14 prop and my average discharge is about 9-11C depending on the wind with max discharge around 22C. <div>
<br></div><div>Peter+</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Dec 7, 2012 at 10:37 AM, Larry Diamond <span dir="ltr"><<a href="mailto:ldiamond@diamondrc.com" target="_blank">ldiamond@diamondrc.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-size:12pt;font-family:times new roman,new york,times,serif"><div>OK, play nice... Never dealt with electrics before... I could be way off base, but here is a stab at it...</div>
<div> </div>
<div>Is my math flawed?</div>
<div> </div>
<div>Motor - Himax 6330-210 F3A Motor (210KV)</div>
<div>ESC - Phoenix Ice 80HV - New V2 Version</div>
<div>Battery 10s - 37VDC</div>
<div> </div>
<div>Plane - 2M Monolog</div>
<div> </div>
<div>Max power range is about ~2,700 to ~3,000 watts with this set up...</div>
<div> </div>
<div>Calculated Battery Discharge Rate = 80Amps (ESC rating) divided by 3,500mAh (battery capacity) = 22.9C</div>
<div> </div>
<div>Based on this math I suspect that a 30C dicharge rate is good on paper... additional discharge performane = $$$ and I don't want to spend money on battery performance I don't need...</div>
<div> </div>
<div>Class - Intermediate</div>
<div> </div>
<div>What is the recommended battery capacity and discharge rate...?</div>
<div> </div>
<div>I understand the many variables associated with the answer like, prop size, temps, wind, throttle control, yada, yada, yada...</div>
<div> </div>
<div>I would like to fly the Intermediate <var></var>sequence a couple time without having to refuel electrons...</div><span class="HOEnZb"><font color="#888888">
<div> </div>
<div>Larry Diamond</div></font></span></div></div><br>_______________________________________________<br>
NSRCA-discussion mailing list<br>
<a href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><br>
<a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" target="_blank">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div>Director, Fixed Wing Flight Training</div>
<div>Santa Clara County Model Aircraft Skypark</div><img src="http://farm8.staticflickr.com/7163/6513778381_5569cc985d_m.jpg" width="200" height="154"><br><br>
</div>