<html><body>
<DIV>4600s weigh about .7 oz more than the 5300s.</DIV>
<DIV> </DIV>
<DIV>4500s are about .2 oz more than the 5300s.</DIV>
<DIV> </DIV>
<DIV>The 4600s will make substantially more peak power (than the 5300s) off the charger, and for a discharge of ~4000 mah, they will be 10-20F cooler (than the 5300s).</DIV>
<DIV> </DIV>
<DIV>If you want the best energy density (and have good cooling) and a fairly flat discharge curve, the 5300s are still the best game in town.</DIV>
<DIV> </DIV>
<DIV>If you want to hammer the packs and don't have the best cooling, the Extremes are a better choice.</DIV>
<DIV><BR>Regards,</DIV>
<DIV><BR>Dave</DIV>
<DIV> </DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-------------- Original message -------------- <BR>From: "Richard Strickland" <richard.s@allied-callaway.com> <BR><BR>> But the 5300s are 4 oz. less wt. <BR>> RS <BR>> <BR>> -----Original Message----- <BR>> From: nsrca-discussion-bounces@lists.nsrca.org <BR>> [mailto:nsrca-discussion-bounces@lists.nsrca.org]On Behalf Of Adam Glatt <BR>> Sent: Wednesday, December 20, 2006 12:34 PM <BR>> To: NSRCA Mailing List <BR>> Subject: Re: [NSRCA-discussion] Cooling outrunners <BR>> <BR>> <BR>> Dean, for what it's worth, Thunder Power now recommends the eXtreme <BR>> Series packs for F3A (and pretty much everything else). I think this is <BR>> primarily because they believe they will have to warranty fewer <BR>> batteries; the eXtreme cells are more robust. For 2007 they are <BR>> recommending the new 10s 5000mAh eXtreme Series pack. It will sell for <BR>
> something like $580. <BR>> <BR>> Masters and below might be better off with a smaller eXtreme Series <BR>> pack. I've seen the discharge curve for the 5000mAh at 25C (125A!!!), <BR>> and it shows a long time at 3.4V and about 80% above 3.3V, so a even <BR>> smaller pack will have no problem putting out the 60-80A we use. <BR>> <BR>> -Adam <BR>> <BR>> Dean Pappas wrote: <BR>> > Hi again Chad, <BR>> > So do you have a decision as to whether you are changing over to the <BR>> Extremes or staying with the 5300 Pro-Lites? <BR>> > >From what I gather, it may not be a clear-cut decision. <BR>> > Dean <BR>> > <BR>> > Dean Pappas <BR>> > Sr. Design Engineer <BR>> > Kodeos Communications <BR>> > 111 Corporate Blvd. <BR>> > South Plainfield, N.J. 07080 <BR>> > (908) 222-7817 phone <BR>> > (908) 222-2392 fax <BR>> > d.pappas@kodeos.com <BR>> > <BR>> > <BR>> > --
---Original Message----- <BR>> > From: nsrca-discussion-bounces@lists.nsrca.org <BR>> > [mailto:nsrca-discussion-bounces@lists.nsrca.org]On Behalf Of Chad <BR>> > Northeast <BR>> > Sent: Wednesday, December 20, 2006 12:37 AM <BR>> > To: NSRCA Mailing List <BR>> > Subject: Re: [NSRCA-discussion] Cooling outrunners <BR>> > <BR>> > <BR>> > Hi Dean <BR>> > <BR>> > Quite true about the magnets, but I have flown with my motor at 150F and <BR>> > on days where it doesnt get above 65F....I can not tell the difference <BR>> > in performance, probably because there is such excess power in these <BR>> > setups to start with. <BR>> > <BR>> > Pack temperature on the other hand is very important, OAT below 10-15C I <BR>> > have to start restricting cooling on the batteries or they dont get warm <BR>> > enough to provide good power. The new extreme packs are better about <BR>> > this
than the Prolites, but still very noticeable on certain days. <BR>> > <BR>> > Chad <BR>> > <BR>> > Dean Pappas wrote: <BR>> > <BR>> >> Bob, you're a genius! <BR>> >> I suggested this to an E-powered CL Stunt buddy in the Netherlands <BR>> >> some months ago because the Stunt guys have a long history of styling <BR>> >> planes with chin scoops placed far back. These often require a 3/4" <BR>> >> long prop drive extension to place the cylinder back farther, and the <BR>> >> use of a short venturi. They cowl much easier than computer carbs! <BR>> >> <BR>> >> Hi Chad, <BR>> >> Makes you wonder what some of these guys were thinking when they <BR>> >> placed the cooling and cheek inlets. ?? **^^$$!!! <BR>> >> The inlet airbox can shroud the aft end of the motor and the sleeve <BR>> >> dump into a front exit plenumm. Now the trick is the exit from there
. <BR>> >> I think that a big elbow like a turbopropo exhaust would be cool, as <BR>> >> would be cheek cowls with no entry holes just exits. The exit plenum <BR>> >> just behind the spinner would have to duct into the cheeks. Notre that <BR>> >> flying without a spinner will wreck the cooling! A row of exhaust <BR>> >> stacks like a P-51 could be boxed in and used to suck the warm air out <BR>> >> of the exit plenum. I need to draw a picture. That'll take a while, <BR>> >> especially around Christmas. <BR>> >> <BR>> >> The colder the magnets are, the stronger they are, and the less <BR>> >> resistive the copper is, so cooler is always better for the motor. The <BR>> >> same is true for the ESC: MOSFETs are less resistive the cooler they <BR>> >> are, so everything gets better in the Antarctic except battery <BR>> >> performance. <BR>> >> <BR>> >> l
ater, <BR>> >> Dean <BR>> >> <BR>> >> <BR>> >> <BR>> >> Dean Pappas <BR>> >> Sr. Design Engineer <BR>> >> Kodeos Communications <BR>> >> 111 Corporate Blvd. <BR>> >> South Plainfield, N.J. 07080 <BR>> >> (908) 222-7817 phone <BR>> >> (908) 222-2392 fax <BR>> >> d.pappas@kodeos.com <BR>> >> <BR>> >> -----Original Message----- <BR>> >> *From:* nsrca-discussion-bounces@lists.nsrca.org <BR>> >> [mailto:nsrca-discussion-bounces@lists.nsrca.org]*On Behalf Of <BR>> >> *Bob Richards <BR>> >> *Sent:* Tuesday, December 19, 2006 9:27 AM <BR>> >> *To:* chad@f3acanada.org; NSRCA Mailing List <BR>> >> *Subject:* Re: [NSRCA-discussion] Cooling outrunners <BR>> >> <BR>> >> Is there any reason why you can't duct the air to blow into the <BR>> >> rear of the motor, and provide a way for it to esc
ape from the front? <BR>> >> <BR>> >> Geez, I'm just thinking that leaving the spinner off, or use a <BR>> >> really small spinner, would be the way to go. <BR>> >> <BR>> >> Bob R. <BR>> >> <BR>> >> <BR>> >> */Chad Northeast <CHAD@F3ACANADA.ORG>/* wrote: <BR>> >> <BR>> >> The problem with a lot of composite fuse models (Twister <BR>> >> included) is <BR>> >> that the inlets in the chin and cheeks are often right at the <BR>> >> rear or <BR>> >> even behind an outrunner.....so ducting toward them is very <BR>> >> difficult. <BR>> >> I have to agree that a proper ducting system is crucial for <BR>> >> cooling. I <BR>> >> use a very simple short radius 90 bend in a peice of depron <BR>> >> that pulls <BR>> >> air in from the chin, I see about a 20C rise in temp without <BR>> >> it, other <BR>> &g
t;> than that I dont really do anything special. The motor will <BR>> >> operate at <BR>> >> up to 170F without complaining so as long as its 20-30F below <BR>> >> that all <BR>> >> is good :) <BR>> >> <BR>> >> Chad <BR>> <BR>> _______________________________________________ <BR>> NSRCA-discussion mailing list <BR>> NSRCA-discussion@lists.nsrca.org <BR>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion <BR>> <BR>> <BR>> <BR>> _______________________________________________ <BR>> NSRCA-discussion mailing list <BR>> NSRCA-discussion@lists.nsrca.org <BR>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion </BLOCKQUOTE></body></html>