[NSRCA-discussion] Power to Weight

[rcmaster199 at aol.com]

Well, let's think about it for a moment. In typical wet power set-ups 
the engines are putting out around 4 horses.

At 750 watts per horse, well...you do the math. The fact that many wet 
power set-ups weigh in at around 10 lbs, 300 w/lb is about right for 
wet set-ups. It should be right for e-power also

MattK
-----Original Message-----
From: Ron Van Putte <vanputte at cox.net>
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
Sent: Thu, 4 Jun 2009 5:09 pm
Subject: Re: [NSRCA-discussion] Long - RE:  Weight

Whoa!  300 watts per pound?  I am currently flying a 10 lb  19.8 oz
(yeah!) E-Genesis with a Dualsky 6360-12T motor, which puts out 2450
watts.  The power/weight ratio is 218 watts per pound and, even
though it doesn't seem lacking in power, it is on a weight reduction
program.

Ron

On Jun 4, 2009, at 3:35 PM, Chad Northeast wrote:

> Dave is spot on IMO.
>
> Also I think one important fact may have not received enough
> attention.  That is that the current legal voltage limit on
> batteries in FAI is 42V.  Increasing the weight and therefore
> required power of an electric model requires that you play within
> that rule.  To generate the necessary static 300 W/lb that most
> current competitive F3A models demand today but at a new weight of
> say even 6 kg (13.2 lbs), using an optimistic value of 35V under
> load you are beyond 100A setups.

_______________________________________________
NSRCA-discussion mailing list
NSRCA-discussion at lists.nsrca.org
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion