A123 Batteries and Futaba Servo/Receiver (Full Version)

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Capt Lou -> A123 Batteries and Futaba Servo/Receiver (4/9/2008 12:57:47 AM)

I would like to use a A123 battery pack in a Futaba FASST System. Does anyone know if the A123 is compatable with the Futaba servo/receiver? I understand that the A123 pack (2cell) puts out 6.6 volts while some of the Futaba servos/receivers are rated for 6 volts. I understand that JR systems can handle the A123 technology.



everydayflyer -> RE: A123 Batteries and Futaba Servo/Receiver (4/9/2008 1:38:45 AM)

Most RC receivers and servos work fine with a 5cell Ni battery which is the same voltage as a2S A123.



Capt Lou -> RE: A123 Batteries and Futaba Servo/Receiver (4/9/2008 1:59:13 PM)

Thank you for the response.



negy1 -> RE: A123 Batteries and Futaba Servo/Receiver (5/18/2008 4:39:07 AM)

i had a problem with futaba g3 reciever on a123 2cell 2300 mha batery and mvvs 35 cc motor with a123 1100mha batery no regulator on both packs the reciever went into failsafe but i think the ign system could be the problem and causing the reciever to go into failsafe can the ign handle a123 cells or do they need a regulater



Capt Lou -> RE: A123 Batteries and Futaba Servo/Receiver (5/18/2008 2:25:27 PM)

Negy1:

I'm not an expert in this area but I use a 2300 mah A123 battery pack for the ignition on a Desert Aircraft DA-50R cc gas engine and it works fine. I checked with Desert Aircraft because the battery pack is rated 6.6v and they said it was ok to use the A123 battery pack without a regulator. Regarding the receiver going to failsafe, I have seen on the RCU Futuba Manufactuer's thread that the Futaba FASST receivers are de-linking from the transmitter as a result of heat build up in the fuselage when the plane is exposed to outside ambient heat, similiar to how the interior of a car gets hot when sitting in the sun with the windows closed. Futaba U.S. has brought this matter to the attention of the Japanese company and is awaiting a response. Also, DA recommends that I keep my receiver at least 12 inches away from the ignition module which I did and have had no issues with the receiver. As you observed, this may be your problem.



Mr. Mugen -> RE: A123 Batteries and Futaba Servo/Receiver (5/18/2008 4:10:40 PM)

Just a side note. I use a 1100mah pack with 3 different 2.4 fasst rx's w/o regulator and have had no issues. A fresh charged 5 cell NiMh pack reachs over 7 volts so I figured I'd try it and am glad I did. Just keep an eye on your capacity. They drop off like the edge of a hill when they die.



Mr. Mugen -> RE: A123 Batteries and Futaba Servo/Receiver (5/21/2008 3:41:22 AM)

If you worried about it wrecking your equipment you can always add diodes inline for a voltage drop. I use rectifier diodes for my 2s lipo flight packs. They drop the voltage .7v for each diode.



negy1 -> RE: A123 Batteries and Futaba Servo/Receiver (5/22/2008 10:57:35 AM)

the g3 reciever pcm not 2.4 i have got a new ign moduel from dl engenes to replace the mvvs vlach ign moduel tha i think is stuffed only recomended at 4.8 to 6 volts so i think the stufed ign system sent the rx into failsafe stil checking thanks mate



negy1 -> RE: A123 Batteries and Futaba Servo/Receiver (5/23/2008 9:01:28 AM)

thanks for the info the failsafe problem has been solved the wire braid shielding that goes to the spark plug whitch is solded to the plug retainer was broken and could not been seen under the heat shrink so resolded shielding tested all is ok the faulty grounding sent the g3 reciever into failsafe you never stop learning ahh thanks felas



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