RCU Forums - View Single Post - digital servo vs coreless - current draw?
Old 09-12-2005 | 01:54 PM
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bdunsire
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From: camano island, WA
Default digital servo vs coreless - current draw?

I've managed to not buy any digital servos so far - only because I have so many JR 4731s in use, and I have been very pleased with them - but as I start to put together the 'next' plane (33% Edge) - I'm thinking it is time to try a few digital servos so I'm ordering some - 8611 for rudder, and a couple of 8411 for elevator (I will use 4 4731s in the ailerons) - And while I'm ordering stuff , I'm thinking I'll replace a couple of 4731s in another plane's rudder (33% Laser) - with a single 8611 ...

But this leads me to the question - I have tons of experience and understanding of current draw in my GS planes with the JR 4731s.

- Replacing a pair of 4731s with a single digital servo of similar overall power - what will I see in additional current draw? (if any) (I use A LOT of rudder when I fly, and one 120 OZ servo was not enough)

Replacing (or more accurately using) 3 digital servos in place of 4 4731s - what would the expected current draw change be?

I have tested / monitored carefully with my 4731s, and in a 10-12 minute - IMAC style - flight, 30 pound plane (with all 4731a except kill and throttle) I would expect to use 'only' 250-300ma per flight. Now the addition of digital servo is the unknown ..

Lots of words, hope it makes sense? I see people using such large RX packs - are they needed, or are folks just super cautious or ??

Cheers,
Bob