Redundant RC Aircraft Systems: Simple and effective redundant battery setup.

[@JasonHurt-of2kj]

Thankyou so much for this video. I ran the same setup, but… my servos are only rated from 4.8-6.0… my battery is 7.4… so, I ran a programmed b.e.c. At 6.0 volts in between the battery and receiver.. if I didn’t do that I would have fried my servos in flight for sure. So thanks to you mentioning this in your video it saved what would have been a failure. Thanks !🙏

[@ChunkyC_RC]

Thanks for the comment. I'm glad it helped.

[@cletusberkeley9441]

I use two schottky diodes back to back so i can safely use two batts, a batt and a BEC, ESC and UBEC, any combination i want. An SBL 3040PT is a great schottky choice, 2 diodes in one package already connected right. I also use a 4700uf 16v capacitor across the buss

[@AlanC5794]

Can't one battery backfeed into the other?

[@ChunkyC_RC]

When you have 2 similar packs, the current rating is the same and they balance out. Theoretically I guess if you had a battery on one side that put out a lot more amps then I suppose a little back charging may occur. But that's why we use the same batts on both sides so it's balanced. Good question 👍

[@AlanC5794]

@@ChunkyC_RC thats good to know. Some insist it will backfeed some say it is fine so I was curious

[@ChunkyC_RC]

@@AlanC5794 I've never had any problems when using identical batts.

[@nigelthompson874]

Yes, can feed back. Need diodes to be really redundant…the whole point

[@superdon1chw]

So it would probably be good to leave you BEC connected with extra battery back up what do you think ?

[@ChunkyC_RC]

Can you explain in a bit more detail? Do you mean a straight battery backup and a BEC? For example, a lipo connected through an ESC.

[@superdon1chw]

@@ChunkyC_RC Yea I have been told that it could damage you receiver, but I think your right I am thinking if voltage is the same it should not matter or even just below max voltage I think it should be OK what you opinion ?

[@ChunkyC_RC]

@@superdon1chw just make sure the battery voltage is within the limits of the receiver and servos and you should be fine, with or without BEC.

[@ramondelacruz7304]

Great video. I would like to know if this set up can be use on any Futaba Receiver? Also if there is any way or change to damage the servos or receiver itself by having two power sources at the same time. Thanks

[@ChunkyC_RC]

This will work on Futaba and pretty much any receiver out there. You shouldn't have an issue with damaging servos or receiver.

[@LSCModels]

Do you think li-on batteries are safe for a RC receiver. Cuz there 1.5 V not 1.2 V do you think it might damage something inside the receiver? Just asking. Good Vid by the way.

[@ChunkyC_RC]

As long as the max voltage of a fully charged pack doesn't exceed the max voltage of the receiver your good. Energy is all the same no matter what type of cell it comes from.

[@dutchloveRC]

good info friend! I thought if you ran two ESCs you could plug them both in too, but apparently you cant do that?

[@ChunkyC_RC]

The power would work but the mixing to make two throttle channels would be a trick. Best to remove the power wire from one of the esc plugs.

[@TheCabledawg1]

Ive done it with a jet. I did put in a schotty diode though. kzbin.info/www/bejne/inybfoyhh62rmc0si=t1jDSntBMrg-a9jJ

[@russneace8436]

That’s good shit boy! Great info, but I need a bit more Chunky C ism’s.

[@ChunkyC_RC]

I'll work on that 😉

[@LSCModels]

Wait hang on a sec. You have 2 batteries plugged in this receiver yes? That receiver is designed to handle 4.8 V. By plugging 2 batteries you double the voltage for that receiver. Wont you damage the receiver by doing that? Just asking. Great video otherwise.

[@ChunkyC_RC]

Nope. If you study up on series vs. parallel circuits you will see that's a parallel circuit and the voltage remains at the battery voltage. It's not doubled. Now, if I ran the batteries in series, then the voltage would double. Good question 👍

[@LSCModels]

@@ChunkyC_RC Very interesting. Because when you plug say one in the receiver you should have 4.8 volts across the whole receiver, plug 2 in you double the voltage. Still confusing but interesting. Thanks brother.

[@nigelthompson874]

Cheap and nasty. Batteries would have to be identical all the time (state of charge) . If one fails, they are no longer identical. Potential for power from one battery to drain to the other. Simple diodes the solution. Each battery can only send power, can’t receive it.

[@ChunkyC_RC]

That's the purpose of this. If one battery fails you still have the other. Yes, diodes work but then that defeats the purpose of doing this setup for a "simple" solution. I've run this setup many times and never had any problems.

[@TheCabledawg1]

Ive used different redundant systems like these: kzbin.info/www/bejne/inybfoyhh62rmc0si=t1jDSntBMrg-a9jJ or kzbin.info/www/bejne/r6DalJ2tmryel7Msi=YbFccqqrL_1zAk0I