Razor servo/electronics system current draw

[mudbogger2]

I was playing around with my razor today and decided to record the current draw my servos and other electronics had with my FDR.
I have a 24-4 on 12S1p 3300 Flightpowers,3 - 9451 servos on cyclic, a Logictech 6100 gyro with servo, CCHV85 esc. All powered by a Flightpower 3S 800 mah lipo pack running through a 6V UBEC.

I got 2 flights on this graph the long space is the time between pack changes. I was shocked to see some pretty low numbers for the current draw.

[buster1]

how is it flying on 12S

[mudbogger2]

:twisted: :twisted: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen: :mrgreen:
pretty good so far!

[OICU812]

Yea I did the same awhile back and seen about the same 1.7 - 1.9 which is why I am currently still running Koolflight BECs'. I also have machines on regulators as well with a 2S FP Lipo.

[mudbogger2]

I played around with this some more today. I had a washout that dropped below the pins and when I powered up my 3 cyclic servos were binding up. With the 3 servos stalled I only pulled 2.8 amps. I wanted to see if I could push it really hard while flying to see what the most I could draw off the system. I guess we will never pull as much amps as I saw with the servos stalled. Still a lot lower that I expected.

The spike in amps at the first part of this graph is where the servos were stalled.

[ozace]

Is that a reading from the battery pack before the ubec ?.

When i have tested in the past i can hit 3amps just swirling the sticks on a few of my helis.

[mudbogger2]

I am reading straight from the battery pack befor the UBEC. I did 5 flights all with some pretty hard flying and never saw over 1.9 amps? Even with the 3 servos stalled it did not get to 3 amps on my setup.

[ozace]

that makes sense.
The ubec is converting the 11.1 volts to 5 or 6v you are using. The electronics are seeing higher amps at lover volts. Your 1.9 amp peak is more like 3.8amps at 6v

[Aussieheliguy]

Yep that sounds right Oz