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Old Apr 14, 2014, 01:54 PM
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Letchworth, Great Britain (UK)
Joined Jul 2004
11,121 Posts
Quote:
Originally Posted by RC Man View Post
I have seen a couple of things that can help with heat.
1. Make sure that you run close to 100% throttle as possible. Unfortunately the Talon does not have data logging so I makes it harder to tune. I have found that if you are running governor and the internal throttle drops below 80% the ESC makes much more heat. If 100% gives way too much headspeed for scale then change the gears.
2. PWM can also make a difference. I donít fly Talon any more so I donít know what the options are but lower PWM values usually make the ESC run cooler.
3. Back when I was doing scale I used one or more 5v electric fans to keep the air moving. You may have to add a fan.

The Talon has switching BEC.
My throttle curve is at 85% for steady hover, and I'm not using governor mode. The ESC runs cold (i.e. ambient temperature) when the heli's in pod-and-boom mode, so I'm looking at fan(s) at the moment. I thought of computer fans, but they seem to be 12v -- at least the ones I've looked at so far are.

Thanks for your input.
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Old Apr 14, 2014, 03:19 PM
A man with too many toys
United States
Joined Feb 2001
17,001 Posts
I buy fans from an electronics warehouse store. I am in the US and buy from Digikey.com. The UK probably has something like that. Electronics warehouse stores usually have low prices and a good selection.


I have used 12v fans by using the balance plug and tapping off 3s. Fans don’t draw that much power so LiPo balance won’t be a problem.


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Old Apr 15, 2014, 02:15 AM
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Letchworth, Great Britain (UK)
Joined Jul 2004
11,121 Posts
Quote:
Originally Posted by RC Man View Post
I buy fans from an electronics warehouse store. I am in the US and buy from Digikey.com. The UK probably has something like that. Electronics warehouse stores usually have low prices and a good selection.


I have used 12v fans by using the balance plug and tapping off 3s. Fans donít draw that much power so LiPo balance wonít be a problem.
Yes, I was thinking of tapping off the balance lead, but I've found plenty of 5v fans now at my local electronics store

But, I wonder; if ESC/BEC heating is the issue, maybe I'd be better off tapping directly into my battery instead of imposing more load on the BEC
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