<font color='black' size='2' face='arial'>In my experi<font size="2">ence, <font size="2">ESCs don't have the same throttle response b<font size="2">rand to brand. <font size="2">Even when the manufacturer gives you a linear <font size="2">vs exponenti<font size="2">al choice, the<font size="2">y are still different. You will just have to fly it and see how it feels.<br>
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<font size="2"><font size="2">Don</font></font><br>
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<div style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original Message-----<br>
From: Larry Diamond <ldiamond@diamondrc.com><br>
To: General pattern discussion <nsrca-discussion@lists.nsrca.org><br>
Sent: Fri, Dec 7, 2012 2:59 pm<br>
Subject: Re: [NSRCA-discussion] Electric Throttle Curve - was Going Electric - Battery Questions<br>
<br>
<div id="AOLMsgPart_2_c3874047-d8f7-4595-81cc-0478b896bee3">
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<div style="RIGHT: auto"><span style="RIGHT: auto">Thanks to all those that respoded so quickly...</span></div>
<div style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: times new roman, new york, times, serif; COLOR: rgb(0,0,0); FONT-SIZE: 16px; RIGHT: auto"><span style="RIGHT: auto"></span> </div>
<div style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: times new roman, new york, times, serif; COLOR: rgb(0,0,0); FONT-SIZE: 16px; RIGHT: auto"><span style="RIGHT: auto">Has anybody plotted or collected data for an electric set up regarding throttle curve?</span></div>
<div style="RIGHT: auto"><span style="RIGHT: auto"></span> </div>
<div style="RIGHT: auto"><span style="RIGHT: auto">I assume if the Prop is the same for a givin plane, it wouldn't matter what Motor/ESC is being used. The plane won't care it's only reacting to prop speed, correct?</span></div>
<div style="RIGHT: auto"><span style="RIGHT: auto"></span> </div>
<div style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: times new roman, new york, times, serif; COLOR: rgb(0,0,0); FONT-SIZE: 16px; RIGHT: auto"><span style="RIGHT: auto">Curious as to nominal throttle control settings vs RPM...</span></div>
<div style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: times new roman, new york, times, serif; COLOR: rgb(0,0,0); FONT-SIZE: 16px; RIGHT: auto"><span style="RIGHT: auto"></span> </div>
<div style="RIGHT: auto"><span style="RIGHT: auto">ATX - SD-10G</span></div>
<div style="RIGHT: auto"><span style="RIGHT: auto">Prop - 21 x 14</span></div>
<div style="RIGHT: auto"><span style="RIGHT: auto"></span> </div>
<div style="RIGHT: auto"><span style="RIGHT: auto">1/4 throttle = ???</span></div>
<div style="RIGHT: auto"><span style="RIGHT: auto"></span> </div>
<div style="RIGHT: auto"><span style="RIGHT: auto">1/2 Throttle = ???</span></div>
<div style="RIGHT: auto"><span style="RIGHT: auto"></span> </div>
<div style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: times new roman, new york, times, serif; COLOR: rgb(0,0,0); FONT-SIZE: 16px; RIGHT: auto"><span style="RIGHT: auto">3/4 Throttle = ???</span></div>
<div style="RIGHT: auto"><span style="RIGHT: auto"></span> </div>
<div style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: times new roman, new york, times, serif; COLOR: rgb(0,0,0); FONT-SIZE: 16px; RIGHT: auto"><span style="RIGHT: auto">Full Throttle = ???</span></div>
<div style="RIGHT: auto"><span style="RIGHT: auto"></span> </div>
<div style="RIGHT: auto"><span style="RIGHT: auto">Larry Diamond</span></div>
<div style="RIGHT: auto"><span style="RIGHT: auto"></span> </div>
<div style="RIGHT: auto"><span style="RIGHT: auto">PS... Has anybody else asked these type of questions or am I making it too complicated?<var id="yui-ie-cursor"></var></span></div>
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<b><span style="FONT-WEIGHT: bold">From:</span></b> Patrick Harris <<a __removedlink__212494612__href="mailto:harris7148@gmail.com">harris7148@gmail.com</a>><br>
<b><span style="FONT-WEIGHT: bold">To:</span></b> General pattern discussion <<a __removedlink__212494612__href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a>> <br>
<b><span style="FONT-WEIGHT: bold">Sent:</span></b> Friday, December 7, 2012 2:02 PM<br>
<b><span style="FONT-WEIGHT: bold">Subject:</span></b> Re: [NSRCA-discussion] Going Electric - Battery Questions<br>
</font></div>
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<div>Larry,</div>
<div> </div>
<div>You have received all good advice. One thing to keep in mind, is you are not going to be able to fly two full sequences with pretty much any setup. With the Himax in a Monolog flying Intermediate, 20C's are going to be perfect. With 20C's and good throttle management you are going to be able to fly the full Intermediate and maybe four or five more maneuvers. If you go up to 40C, you will find the Himax way to hot for Intermediate, and you won't add that much flying time. </div>
<div> </div>
<div>Another thing about the Himax is it really needs an aggressive throttle curve on the bottom. If you just fly it out of the box it will have zip for low end and nuts for high end all at about mid throttle. On the low end, you will just keep pushing and pushing and nothing seems to happen until you hit mid throttle and it will go nuts. The best throttle curve on my Himax looks like a snake. It ramps up really fast on the low end, tappers off at mid throttle and then heads back up on the high end, but you need to work it out for your set up. Trust me, spending a good amount of time getting this right is going to pay big dividends. If you don't, your uplines are going to be way too hot.</div>
<div> </div>
<div>Hey Larry,<br>
<br>
As everyone is telling you, the BIG difference between what you're proposing and what you're accustomed to with Glg to below is that you'll fly 90% of your sequence at half throttle. Not figuratively half throttle... but literally half, or below. Even a vertical upline does not need full motor on these setups. Flying intermediate even less so. Also, at full throttle you'll likely only pull about 75amps, so even 15C batteries would get the job done, but I would stick with 20 and higher.<br>
<br>
<br>
Mark Atwood<br>
Paragon Consulting, Inc. | President<br>
5885 Landerbrook Drive Suite 130, Cleveland Ohio, 44124<br>
Phone: <a rel="nofollow">440.684.3101 x102</a> | Fax: <a rel="nofollow">440.684.3102</a><br>
<a __removedlink__212494612__href="mailto:mark.atwood@paragon-inc.com" rel="nofollow">mark.atwood@paragon-inc.com</a><mailto:<a __removedlink__212494612__href="mailto:mark.atwood@paragon-inc.com" rel="nofollow">mark.atwood@paragon-inc.com</a>> | <a target="_blank" __removedlink__212494612__href="http://www.paragon-inc.com/" rel="nofollow">http://www.paragon-inc.com/</a><<a target="_blank" __removedlink__212494612__href="http://www.paragon-inc.com/" rel="nofollow">http://www.paragon-inc.com/</a>><br>
<br>
<br>
<br>
<br>
On Dec 7, 2012, at 1:37 PM, Larry Diamond wrote:<br>
<br>
OK, play nice... Never dealt with electrics before... I could be way off base, but here is a stab at it...<br>
<br>
Is my math flawed?<br>
<br>
Motor - Himax 6330-210 F3A Motor (210KV)<br>
ESC - Phoenix Ice 80HV - New V2 Version<br>
Battery 10s - 37VDC<br>
<br>
Plane - 2M Monolog<br>
<br>
Max power range is about ~2,700 to ~3,000 watts with this set up...<br>
<br>
Calculated Battery Discharge Rate = 80Amps (ESC rating) divided by 3,500mAh (battery capacity) = 22.9C<br>
<br>
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...<br>
<br>
Class - Intermediate<br>
<br>
What is the recommended battery capacity and discharge rate...?<br>
<br>
I understand the many variables associated with the answer like, prop size, temps, wind, throttle control, yada, yada, yada...<br>
<br>
I would like to fly the Intermediate sequence a couple time without having to refuel electrons...<br>
<br>
Larry Diamond<br>
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