detect drop below critical voltage for lipo

[glenn cain]

have anyone tested roughly how the helicopter reacts or behave near the critical voltage point? i mean, has anyone verified that when full throttle cannot provide usual lift, it REALLY means that the batt is at about 6V and not below it?

[D.Yeo]

never hooked up my voltmeter when the packs near empty, but i'm quite certain flying till it wont lift anymore is pushing it way too far.

It would appear that flying till power's startign to drop is the best bet.

[mack]

Hi,
JETI has latest speed controllers for brushed motors with 4 modes (simply selected by jumper) as follows: -

Mode 1
Nc/NH/Br.ON
active brake, power pack type NiCd or NiMh, cut off at 4V or 0.7V per cell

Mode 2
Nc/NH/Br.OFF
non active brake, power pack type NiCd or NiMh, cut off slow down at 4V or 0.7V per cell

Mode 3
Li/Br.ON
active brake, power pack type Li-polymer, cut off slow down at 5.2V / 2 cells, 8.0 / 3 cells

Mode 4
Li/Br.OFF
non active brake, power pack type Li-polymer, cut off slow down at 5.2V / 2 cells, 8.0V / 3 cells

Hope that the above info helps. Check them out!

Cheers,
Mack

[AceViperX]

Originally posted by glenn cain
have anyone tested roughly how the helicopter reacts or behave near the critical voltage point? i mean, has anyone verified that when full throttle cannot provide usual lift, it REALLY means that the batt is at about 6V and not below it?

DUH! why do you need to know that? if you can't get enough lift already, stop flying.....

[PhiBeR]

hahaha..
I agree with Bernard!

Glenn you really need all the lipos u can buy!
Seems that u got compulsive throttling disorder.. :P

[glenn cain]

well i mean you never know if your heli still has lift and yet it actually has passed 6V, then we cant really see it would we?

[D.Yeo]

that's right , and that's why you got to stop when you start to feel the power's diminishing.

From my experience flying till lift becomes and issue or the tail starts to lose it's proportionate share of power is discharging it too deep already and kills the battery