Arcing on battery connection

[BHChieftain]

Hi,
My new setup is using a hydra 240 ESC, there is no power switch. I'm getting a pretty significant arc when connecting the batteries-- is there a way to minimize the spark?

-Chief

[mappo]

Hey Chief, according to castle, a large spark requires a 1 ohm resister connected to the positive side of ESC and the battery conn. http://mgm-compro.com/pdf/en-antispark-d230808.pdf

[BHChieftain]

Hey Chief, according to castle, a large spark requires a 1 ohm resister connected to the positive side of the battery conn. http://mgm-compro.com/pdf/en-antispark-d230808.pdf

Makes sense.

Note, when I connected the batteries (two lipos in series), I connected the first lipo to the positive lead to the ESC, then the second lipo to the negative lead to the ESC, then I connected the two batteries together (BIG SPARK).... does this order matter at all? Ie, would it be better to connect the batteries together first, then positive to ESC then finally negative?

Not sure this would make any difference but thought I'd check...

-Chief

[mappo]

i will connect both batt. first then connect to pos. and neg. on esc

[BHChieftain]

Hey Chief, according to castle, a large spark requires a 1 ohm resister connected to the positive side of the battery conn. http://mgm-compro.com/pdf/en-antispark-d230808.pdf

Instead of hard-wiring the resister onto a second line in //, could I rig a bridge wire with a resister to "charge" the capacitors before connecting the mains?

IE, connect everything except the battery positive, then connect a bridge wire with the resistor between the battery positive to the ESC (which should charge the capacitors), then remove the bridge, then plug in the mains? I really don't want to solder a second wire onto the lipo pack...

-Chief

[mappo]

sure you can! make the bridge as short as possible.it will save the replacing of connectors on the ESC. and less stress on the capacitors.

[Simon.O.]

I too run a series setup for my big cat 2S+3S and no matter what order I hook up the connections I get the big crack sound as it makes. My ESC (dodgy Mystery) is so far fine and I will continue to do it this way. It has worked for me for countless hookups. My 4S rigger has the same speedie and does the crack/spark thing too.

For low cost speedies it is not a big worry.

[Jeff Wohlt]

I went to Radio Shack and got 4 1/2 watt 3300 resistors and am going to do nothing more than put one between some 14 ga wire with alligator clips...I will then just clip it on the last hookup and charge the caps and then plug in the main lead.

Should work fine for anything less than BIG set ups I typically run 4S but want to move to 6S.

Will this handle the 6S power?

[mappo]

I went to Radio Shack and got 4 1/2 watt 3300 resistors and am going to do nothing more than put one between some 14 ga wire with alligator clips...I will then just clip it on the last hookup and charge the caps and then plug in the main lead.

Should work fine for anything less than BIG set ups I typically run 4S but want to move to 6S.

Will this handle the 6S power?

Here is a guide for "Do it yourself"! Castle Recommends a 1 ohm for their systems, according to Tech support, anything else will damage your esc.
http://mgm-compro.com/pdf/en-antispark-d230808.pdf

[JMSCARD]

Can anyone please... I mean pretty please take a picture of the tool they are using for this spark problem... I am a see person... and I'm a little slow...lol

[egneg]

Can anyone please... I mean pretty please take a picture of the tool they are using for this spark problem... I am a see person... and I'm a little slow...lol

I posted a pic in your thread.