rrragmanliam

My Feedback: (1)

I put four flights on a plane today. Brought the thing home and cycled the battery. It's a 270ma pack. At the start of the discharge the pack was reading at 4.77 volts. I discharged down to 3.6 volts and pulled 166ma out of the pack when doing so. My question is do you think I could of safely flown 6 times without a problem. The numbers indicate to me that I could have. Opinions?

Thank you,

Rrraman

Lynn S

on my battery tester the Red Zone(recharge) starts at 4.6 volts, anything below that would be pushing your luck.

BMatthews

Nicads and NiMH cells are on the lower knee by 1.1V per cell. So you should really consider a 4 cell pack as dead by the time it hits 4.4V. But the decay from 4.4 to 3.6 should have been quite rapid from the charts I've seen. That 166 ma you typed I assume is actually 166 ma-HOURS rather than the discharge current. If it was just the currect how long did it supply the 160 ma for? Assuming it was ma-hr let's round it up to 150 ma-hrs left to hit the knee at 4.4V. So 4 flights used 270-150= 120 ma-hr. From this figuring I would say that you're safe to go for 6 similar flights easily and still have a safety margin. I would even say that you can do 7 or 8 without any problems.

jboy381-RCU

i get five good flights at six minutes pre flight...i'm useing nicad cells at 270mah...i think you would be ok on a model that only ran two servos...if you run four,i wouldn't push my luck...

john

XJet

I've been able to get four five or six minute flights without problems from my 270mAh pack. It's powering an FMA M5 receiver and four HS81 servos -- most of which are pretty busy for the entire flight (hey, straight and level is for sissies :-)