Weyfly Posted April 12, 2012 Share Posted April 12, 2012 I would like to use a SBEC to supply a RX via a lipo battery, despite Eneloops keeping their charge they still lose some and need to be charged and cycled, lipos seem to keep their charge forever. What size do I need for four and six servo gliders, 3 or 5 amp? I brought a Turnigy SBEC with (8V-26V input) 5 or 6v 5 amp output supply to try for my 6 servo set up, it works but which is the ideal to use? Most of my servos are anologue. Quote Link to comment Share on other sites More sharing options...
Allan Bowker Posted April 12, 2012 Share Posted April 12, 2012 I would imagine that a 3amp would be enough for your setup stated, however, I would go for a higher rating if size/weight/cost is not an issue. This is an excellent thread that gave me a good idea of how many amps a servo needs Quote Link to comment Share on other sites More sharing options...
Steve W-O Posted April 12, 2012 Share Posted April 12, 2012 I have 3A and 5A UBECs, the difference in weight and size is so little, I won't buy 3A again. Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted April 12, 2012 Share Posted April 12, 2012 Just looked at link in the second post so no need for my limited leccy knowledge Good post that ticks all the boxes Edited By Engine Doctor on 12/04/2012 14:13:33 Quote Link to comment Share on other sites More sharing options...
Weyfly Posted April 12, 2012 Author Share Posted April 12, 2012 Thanks, I have seen that thread, electricity is something that goes on behind the skirting board! The last two answers about the size and cost of the sbecs makes more sense to me. Quote Link to comment Share on other sites More sharing options...
Tom Wright 2 Posted April 12, 2012 Share Posted April 12, 2012 Posted by Steve W-O on 12/04/2012 13:52:41: I have 3A and 5A UBECs, the difference in weight and size is so little, I won't buy 3A again. I would agree with Steve on this one as the cost and weight difference is negligible by compassion to the advantages gained by having plenty of capacity in reserve. Tom. Quote Link to comment Share on other sites More sharing options...
Weyfly Posted April 13, 2012 Author Share Posted April 13, 2012 Thanks for those replies, very helpful Just looked at the UBEC s again and found a 3amp one that says 5amp max??? So, 3amp continuous and 5amp peak????? I would read that as 5amp??? Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted April 15, 2012 Share Posted April 15, 2012 No ! read it as 3 amp ,Its the old trick of suppliers/manufactures playing with numbers to make item look better than it really is. If in doubt go for a larger capacity than needed to give a safety margin. Quote Link to comment Share on other sites More sharing options...
Weyfly Posted April 15, 2012 Author Share Posted April 15, 2012 Thanks for that, I suppose the truth comes viewed from many different angles and which brand you're selling? Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted April 15, 2012 Share Posted April 15, 2012 ED has it right....the wise aeromodeller will always allow a significant safety margin rather than pushing things to their limit.....especially something as important as the radio power supply......if the UBEC fails you have a free flight model & all the failsafes in the world won't help you......not good.... Quote Link to comment Share on other sites More sharing options...
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