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yellow-bird -> RE: NEED ADVISE ON ESC FOR A LEAPORD (9/29/2012 11:48 PM)
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Hi Barney
The 4072 2000kv is designed for 4S to 6S operation, but to some extent it depends on what you put it into. In a boat the motors work harder than a car for example because drag is much higher and you can spend more time with wide open throttle. With the Octura x642 (if that's what you have, if you take it off you may find some stamps on the hub to confirm) I think you would be fine with 4S operaton and this will be fast and reliable - the Octura props are very good.
As the battery voltage increases the boat will get faster - 6S will be significantly faster than 4S. You might get 40mph or so on 4S but 50-60mph on 6S.
To run 6S you might need a smaller propellor or the motor will draw a lot of current and everything will be stressed. This could be fine for one run but over time something could get damaged. The simplest way to try 6S might just be to get three the 2S packs in my previous link and just daisy-chain them. Alternatively if you had four you could use them as two boat sets, try 6S, or use them all together with two in series and two in parallel to extend your runtime depending on how you configure them.
On 4S you might get around 4-5 minutes of flat-out running on the batteries I suggested, depending on the size of your pond/ lake. Increasing the voltage will increase the power consumption and current draw and therefore reduce your runtime. With four packs together (2 parallel, 2 series) you could extend your runtime up to nearer 10 minutes of flat-out running.
-yellow-bird
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