Hi John
I know of one that was a 3s pack running through a common switching reg used in pattern, the regulator overheated and failed in flight. I know of at least two others (I am sure there are more) where people were trying to step down their main battery pack voltage in a pattern plane to power their RX, that really showed why running more voltage is a bad idea
Stepping down 35+V to 5.5V, with 6 digital servos eats up a regulator pretty quick I guess lol
In my experience most of the small regulators we use in F3A are good for 3-5A coming from a 2s lipo, more if you can put some cooling to them, even the nice digi-switches from Powerbox only state about 5A unless very good cooling. So if you are coming from 7.5Vish under load to 5.5V thats 2V@5A, or 10W, up that to a 3s pack and you now have to deal with 11.3 ish to 5.5 so you are 5.8V@5A or ~30W, a 2x increase that has to be dealt with someplace in either a heatsink or some good airflow. Now give that reg to a guy that will wrap it in foam, and you have yourself a crashed plane
Quote:
Originally Posted by Vulcan1
Chad,
I would be interested to know what caused there failures. Ken has a regulator that I made and from my research to find a better chip I have run into a snag. Not from the voltage end but from the current side of it. The most I have found so far is a 10 amp regulator which is very expensive. A lot of regulators are advertised at 10 amps or better and I find it hard to believe they can carry that much current especially at the cost they sell them for.
Thanks, John
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