Quark setup assistance

Hey all,

Not really new here as I have surfed around here for awhile. Im doing a project conversion where i want to use 3 to 5s 5000mah lipos, a 8xl feiago motor, and my esc of choice is a quark 125b. This should be plenty of power to fuel the motor and the esc should handle all aspects of it.

I read in a review that the BEC on the esc should be turned off. I cannot find a section of that in the manual. Also, assuming that the bec can be turned off via the esc as a setting, would all i have to do is hook a 2s lipo up to a voltage regulator and hook it up to the rx's battery port (under channel 1?) or would I have to wire it into the battery/ esc input wires? I have read conflicting views on this but I would like to know for sure. :032:

thanks in advance!

[sjcrss]

actually you just pull the red wire from the servo plug....to turn off bec function

[BrianG]

You don't need a seperate lipo pack for the regulator; it runs off the main battery packs. But since the main packs can have a decently high voltage, everyone runs a switching BEC which is MUCH more efficient. A standard voltage regulator would suffer the same high heat issues that the ESC regulator would since they are basically the same thing.

This page should help you visualize how the BEC is hooked up. Just choose the second or third option under the "Receiver Power Wiring" section.

And welcome to the forums!

Ah cool! Thanks guys!

The servo regulator thing that I have takes the 7.4V 2s lipo down to a regulated 6V. I think I might try that route. Seems simpler to me.

[BrianG]

Simpler? Not really IMO. It requires the use of yet another battery pack, which is one more thing to charge and it adds weight (granted, it is minimal). And since it uses lipos, does it have a low voltage cutoff? I'm sure you wouldn't want to ruin a lipo by draining it too far. With a UBEC that attaches to the main battery pack(s), you only have one thing to charge. Much more convenient.

I do see your point. I have a couple 1000mah to 1500 mah apogee short pack and servo regulators though. For now at least I will prolly use that and then later on, as funds begin to surface, I will streamline it with the UBEC. I really do appreciate your help and those custom diagrams are awesome!

[GorillaMaxx360]

brian for wiring of 2 battery packs - parallel is both volts added togeather (for example (2) 7.2v packs = 14.4v in Parallel mode)
- series is both mah added togeather
(for examle (2)7.2v 4000mah bats = one 7.2 volt 8000 mah in series)

is this correct or is it backwards

Gorillamaxx360: You're backwards on the pack wiring. Wiring packs in series adds the voltage and wiring packs in parallel adds the capacity.

For example: 2x 7.4 volt 8000mAH packs wired in series would be a pack with 14.8 volts and 8000mAH.

2x 7.4 volt 8000mAH packs wired in parallel would create a pack with 7.4 volts and 16000mAH

[GorillaMaxx360]

cool thanks

[GorillaMaxx360]

so i am shooting for more voltage so i want a series correct/

[BrianG]

Yes, series adds voltage, parallel adds current/capacity.

[GorillaMaxx360]

thanks