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Old 07-15-2012, 09:57 PM
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kyleservicetech
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Originally Posted by Uawflyer View Post
Hey there! I have had a couple of time where the ESC cut out and am thinking about setting up with a receiver pack so that if that happens I still have control surfaces. Just want to ask and make for sure that this will not fry anything before I start setting things up. Thanks for the info!!!
This type of thing is fairly easy to set up. Problem is it does add a few ounces of weight, specifically about 5 ounces if you use two 2300 Mah "A123" cells. An option would be to use two 1100 A123 cells for a smaller model. The 1100 Mah A123 cells will weigh about 3 ounces.

One very good source for the 2300 Mah A123 cells is http://www.voltmanbatteries.com/serv...1-dsh-A/Detail. Both many club members and I have ordered about 100 cells from this company, with zero issues or problems. (And they are located in Ohio!)

I've been using this setup on three different models with a combined total of near 200 flights. Also designed an on board voltage monitor that records if the receiver voltage ever drops 6.0 Volts DC. During those 200 flights this spring, I did note several flights where the recorded voltage dropped to 5.4 Volts DC. That was traced to a Castle Creations 10 Amp uBEC whose programmed 6.6 Volt DC output voltage dropped to 5.4 Volts DC at a 10 Amp load. The CC uBEC was replaced.

This setup will work with either the CC 10 amp uBEC or the CC ICE series of ESC's.

Take a look at the wattflyer thread that shows how this was done.
http://www.wattflyer.com/forums/showthread.php?t=63794

Note Dennys battery undervoltage alarm. The "PicChip" measures voltage some 4000 times per second, and if the volts drops below 6.0 volts DC, it displays just how low the voltage dropped by flashing the LED in a code. (The PicChip needs to be programmed with the proper software) If anyone is interested, I could put together a kit for this alarm. It would require ordering more circuit boards though, and that would be a fixed cost of $65. Cost per unit is something like $10. I've built 16 of these things so far.

It simply plugs into an unused servo channel, and weighs in at a fraction of an ounce.
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Last edited by kyleservicetech; 07-15-2012 at 10:18 PM.
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