[NSRCA-discussion] Long - RE: Weight

Ron Van Putte vanputte at cox.net
Thu Jun 4 13:09:11 AKDT 2009


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.



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