Lipo Voltage Monitoring

[buster1]

What is the best way to monitor the lipos on board heli. to ensure not going below safe voltage,
What are the best ways to ensure this either checking on the bench or monitoring in the heli.
I am no expert in this area, any help would be appreciated,
Thanks,
Jeff

[Pinecone]

Pete (Efliernz) here in HeliFreak makes a line of very nice lipo low voltage alarms. I have several and they work well.

This combined with timing works quite well.

For timing, start with a short flight 3, 4, or 5 minutes. Recharge the pack and check how many mAH you put back into the pack. Your target is a maximum discharge level of 80% of the pack capacity.

So say you have a 2100 mAH pack and you fly 5 minutes and put back in 1100 mAH.

2100 x 0.8 = 1680 = target maximum discharge.

1100 mAH / 5 minutes = 220 mAH per minute used by your heli.

1680 mAH / 220 mAH per minute = 7.64 minutes max flight time. So I would set my timer for 7 or 7 1/2 minutes

[Efliernz]

I have a new 4-5 four-light model that covers the common setup voltages for Swift sized models now too. I'll update the site when I get a chance.

Thanks for your words Terry :)

[jtpowell]

I bought a "Loud As Hell" lipo alarm from apogee for my 450. It worked great until I damaged it after too many crashes. Now I just use my timer.

[Pinecone]

Pete can also add a dual piezo buzzer setup that you can definately hear. :)