Voltage Limitations

[Skip Allen]

Would someone tell me if 7.4 volts is too much juice to use with a Futaba receiver, two servos and an RMG winch? I keep getting confused as to how many vols there are in each cell. Thanks. [:)]

[Larry Ludwig]

It can be fun, most nicads these days it seems... come without any markings. I bought some today at my favorite electronic shop and of course... no markings... well... nothing indication voltage, mah... nothing. Oh well. You are usually safe in assuming that AA sized nicads (not alkaline AA) are 1.2 volts... hence a great deal of transmitters use 6 cells for 7.2 volts. Notice how many battery packs you see for R/c cars etc that are 7.2... same reason.

I got mad at a junk pile HiTech radio and I have been using it with a 12 volt gel cel trying to blow it up... no luck... it still works fine.. and might even have slightly better range. [:0]


Most receiver packs use 4.8 or 6 volts, I have used the voltage interchangeably for years, but you might want to look up your system specs at one of the major online hobby dealers that sells your particular model of Futaba. I would imagine that 6 volts would be plenty, 4.8 is what they come with normally.

[kahle67]

Skip,

Your RMG has a voltage regulator which makes it safe to run a 6 cell pack. As long as your power supply runs through the winch first and not directly to the reciever, you will be fine.

RK

[Larry Ludwig]

I have had a long day getting ready for a road trip taking 7 boats tomorrow... so forgive me for being stupid. I was just out working in the shop on last minute details and remembered writing that most transmitters take 6 cell for 7.2 sorry... 8 cells for 9.6 volts.
The old brain is off again.

[Matthew Houghton]

Take it for what it's worth but I think that my RMG specifically said no 7.2's.

Matt

[Skip Allen]

Thanks everyone! I was given a LiPo battery pack that lasted for hours in a R/C car. I thought about putting in my boat, but, I have heard they could explode if not charged properly or come in contact with moisture. Thanks again. Skip[:D]

[kahle67]

Actually, the set up manual says that the operating range for the RMG is 3.8 to 8.7 volts.