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What ESC to use?


Old 08-20-2010, 04:57 PM
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Default What ESC to use?

I saw the Exceed Optima 4800 and 5000 kv motors on the website. I have an FMS L-39 64MM Albatross, and I want more power.

Which motor is better between the 2, and what ESC should I get? A 45? Would a 45A ESC work for either with a 4s?

Also would this fit alright on the L-39? Anything extra I need to buy? And how do you install it?
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Old 08-23-2010, 11:07 AM
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Default RE: What ESC to use?

A common misconception is that changing a motor will somehow result in "more power".

"Power" or more correctly "power consumption" is determined by prop/fan size and the supply voltage.

You CAN switch to a higher capacity motor, that can handle higher current, but this of itself will not result in more perceived power.
Higher KV rating alone, may result in nothing more than more energy being wasted as heat, if the fan cannot spin at full speeds due to the load.

Instead, you should try to determine what the max RPM's of the EDF you are using, are. This lets you configure the KV rating of any replacement motor to the voltage source you will use ( aka battery ).

In a situation like this, I would opt for the LOWER KV motor so I can then switch to a higher battery cell count, while keeping the impeller within it's design limits.

This may also entail increasing the battery size ( and weight ), changing the ESC, and maybe even the EDF itself... all of which will add weight, possibly defeating such efforts.

On some smaller EDF's I've easily been able to achieve "more power" by reducing the weight and drag.

e.g. remove the gear, and sacrifice flight time with a smaller but higher "C" pack.... and the difference is night and day.

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