RCU Forums - View Single Post - Power Expander or not -that's the question
Old 12-10-2008, 10:04 AM
  #139  
Hammbone
My Feedback: (309)
 
Join Date: Jan 2002
Location: Loveland, CO
Posts: 1,682
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Power Expander or not -that's the question


ORIGINAL: bodywerks


ORIGINAL: Hammbone

What's a blow-over?

Also, I thought the purpose of a DC-up was to make up for the low amp rating of Li Ion batteries. It stores energy to be used when the battery can't keep up with demand. Is there a reason to use it with A123's?

Jim
Blow-over is kinda like a waterfall, which I also did during that flight. The blow over is just pushing hard over top and dropping in to a harrier or harrier roll, so it probably doesn't demand as much of the servos as a waterfall.
The DC-up is a temporary power back-up. It is great for li-ions for the reason you say, but it is also like adding an additional source of current through an additional lead plugged into the receiver. The A123's don't have a problem delivering current, but as you say, the leads are limited. So it's like having 1/3 more current carrying ability in the most demanding situations, albeit momentarily.
I imagine that the 5.9v that I saw was either during the KE loop or the blender, which are two maneuvers that I don't much care for anyway and rarely do them.
So does this mean that you actually have 3 leads going into the rx?

Jim