Seaking 120 help

[Savage Skidoo]

I got my order from OSE thanks btw very quickly . In it was 2 -120 amp Seaking's esc , i got it all wired up with a c/c bec and a leopard 3674 - 1700kv motor on 2x3's 5000 for a bench test , all went well .I unplugged everything . i went for dinner came back to test again , motor dose not turn , servo works , i changed motors same thing , on that same set up i took a T-180 and all is good , is this new esc junk , i rebound all , reset all , esc seems to get warm from me pulling the trigger & the beep beep sounds ......any help would be great . Mike

[RayR]

Your Seaking also has BEC built in. If you hooked it up with an external BEC, the two are not playing well together. Either remove the red wire from the ESC or discontinue using the external BEC. I hope you didn't fry the internal BEC in the Seaking with both hooked up, but it's possible.

[Savage Skidoo]

I know this Ray , i also picked up a wire extension too pull the red on it so i still can use my program box when in need ....i have stripped it and wired up the 2nd one i purchased , it works fine

[Savage Skidoo]

sent it back .....i did

[Savage Skidoo]

Well just too let yous know , i hooked up the 2nd ESC i got from OSE , bench tested it and water tested it . I took it to the lake for a test . With in 1 min run time the boat seemed rather slow then a strange noise came from the boat the 2nd esc has stopped working , shipped it all back too OSE , now we wait $415 order up in smoke , I believe that this 3674 1700 kv motor took out both esc's . This motor was brand new from ose too . Or is it possible 2 esc are NFG .

[lenny]

Hey what boat where setting up with that setup and on what prop ?
You say a strange noise, Was is the caps popping ?

[Savage Skidoo]

IMGA0061.jpg
Len its a H&M Drifter 'S' 26" , wat was in it was 2x3s 5000 p220

[Savage Skidoo]

IMGA0072 (2).jpgIMGA0068 (2).jpgIMGA0081 (2).jpg
this motor was hardwired add on's for flex , I see my buddys motor same , but wires are different .

[bigwaveohs]

I run that 3674 on a T-180 with 5S...a 120 might not be enough...

[lenny]

Why do you have four plugs going to the rx ?
Also what connectors are on the motor with the very small jacket on it ?

[lenny]

What motor is that one in it ?

IMGA0031.jpg

IMGA0061.jpg
Len its a H&M Drifter 'S' 26" , wat was in it was 2x3s 5000 p220

[Savage Skidoo]

What motor is that one in it ?

IMGA0031.jpg

Just a mock-up motor till the order came .

[properchopper]

Are you running your packs in parallel or series? I may have missed that but ?

[TheShaughnessy]

Are you running your packs in parallel or series? I may have missed that but ?

He is running 5s. 2sx3s 5000's according to post 7.

Something is up here.. Operator error ? Thought savage has been around the block a couple times.

[properchopper]

Post #7 says 2 X 3S - at 3.7V nominal that's 37,740rpm. With a P220 that may draw more current than a T-120 is comfortable with.

[lenny]

6s, 2x3s 5000mah in series.

Why do you have four plugs going to the rx ?

I think adding some bigger caps would have helped the setup,
But I never tried running a T120a on 6s yet.

[Savage Skidoo]

He is running 5s. 2sx3s 5000's according to post 7.

Something is up here.. Operator error ? Thought savage has been around the block a couple times.

I've had a few goes thats for sure , there's nothing wrong with this set up , besides with it hitting 35 mph is kindda slow for this set up don't you think . 2 x 3 s = 6s

[lenny]

I've had a few goes thats for sure , there's nothing wrong with this set up , besides with it hitting 35 mph is kindda slow for this set up don't you think . 2 x 3 s = 6s

You funny guy,
May be you need to sharpen and balance the prop better.

[properchopper]

I've had a few goes thats for sure , there's nothing wrong with this set up , besides with it hitting 35 mph is kindda slow for this set up don't you think . 2 x 3 s = 6s

While I can't explain why the ESC's are smoking (other than 1700KV on 6S with that prop is a little over-ambitious) you should be, once everything is working correctly getting upwards of 70mph if it stays on its bottom. My 2006 NAMBA SAW record with a Drifter S was 34.1 mph with a brushed motor and 12 NIMH's so your setup has issues if you're only getting 35mph.. My 2013 NAMBA P-Ltd Offshore record with a Drifter S on 4S and a cheapie UL-1 motor was 67.771mph (with three fast passes at 71.xxxmph)

One thing that may need to be addressed is the well-known reputation of these ESC's to prematurely go into LVC cutoff mode (half throttle - sound about right?). They seem to monitor peak downspikes (which are fairly normal) instead of average voltage. Add to that the fact that you're using GensAce batteries which, when I tried them, collapsed easily under load. You might experiment with disabling the LVC (most all users of these 120's and 180's ultimately do that) and see what happens. Once you get your Drifter sorted out you'll have a really nice ride !

[TheShaughnessy]

Your experience leads me to believe there is indeed a problem with the set up. As Properchopper stated you may be over taxing the 120 a bit.

Did the calibration process go smoothly? 35 is awfully slow for that power in a 26" cat. Maybe the esc wasn't running at 100%. That would cause it to heat up and subsequentially fail.

Pretty strange to have 2 NIB esc's fail.

Can you post a pic of how you had the BEC removed and the castle in its place?

Lenny I would guess the 4 plugs to the rx are 1 steering 2 throttle 3 BEC 4 I'm guessing the gps pulls power from the rx

[Savage Skidoo]

IMGA0061.jpg
Len its a H&M Drifter 'S' 26" , wat was in it was 2x3s 5000 p220

The funny thing is these two boats are set up identical in power . The Drifter is lighter with the batteries installed in it and the AC has none . The AC Lightning ran really well on 6s with a p225 back cut and sb p by me , i'm thinking on the 1st bench test something let go in the motor . 1st esc got warm when plugged in , 2nd one i had a one minute run , nothing burnt up or bad smells , all out quit working , i plugged in in to see if the programs were still set the same they checked out ok .

[properchopper]

Mike has brought up another good point ; the esc needs to see full throttle correctly calibrated from the Tx. Hold throttle wide open THEN connect batteries to calibrate. It helps if you have three hands

Getting the Drifter S dialed for the NAMBA P-Ltd Cat SAW record a few weeks ago : AQ UL-1 / T-120 with disarmed LVC / 4S2P Dinogy 65C/130C 3700 mah's. Almost there !

https://www.youtube.com/watch?v=E4CDKEKzwdE

[Savage Skidoo]

Yes it did on both esc's , well i sent it all back , i couldn't
even arm them . Could the newly installed pacemaker have effected this set up

[Savage Skidoo]

Thanks OSE , i got the new stuff replaced , Rookie this H&M 26" is coming for you
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[tlandauer]

The first time when I ran 6s with the SeaKing 120 was also the very last time I did that...
I am at least grateful that it did not let out the smell.
I have written that ESC off of my list as a possible 6s ESC.