Cap banks - the pre-emptive answer

[drwayne]

They sell a 63V version that Maxmekker installed. Maybe a typo Wayne or do they have a 35V version too??

A diff branded 35V, sorry.
However, I'll cover my ass by saying I subconsciously intended to say cap voltage +20% of packs is best for power circuits.

just with some tape now. 2 set's of lipo's charged, and if it works, temps/speed etc are good, I will sit down and do a better job. soon to cold and dark here in Norway to do boating anyway,( when sept hit's it's like a switch, chilly and early dark)
but I have some fresh 65-130c 5000 lipo's just in the door I want to try out.

If it's cold outside, make sure your packs are warmed to ~body temp. makes for much better performance and longevity your packs.
W

[maxmekker]

Yea doc, got it covered. It's not that cold, just to cold to swim for the boat if it....... uho did I just say that..... hehe.

[maxmekker]

2 sets of lipos today, barely made it before it was to dark.
Sorry about the wind noise. 45-90c lipos first, then 65-130 later in the clip. Temp readings at the end.
It feels ok, not as strong as my friends mystic with the same setup though . Also it has some slight stutter as you can hear @ 1,44-1,46 and 2,25-2,27 in the clip .like it's cutting out a fraction of a second

Running a x442 in this clip. Will test with 642 an 445 tomorrow.

[tlandauer]

Looks great! I think the boat is really dialed in and very quick, do you think it is just you who thinks it is slower than your friend's?
I hear the stutter, but I am not knowledgeable to say anything.
In any case, glad you fixed the ESC and thanks to drwayne, I learned something very important!

[maxmekker]

hehe maybe. I'm just impressed with the mystic hull, better molded than my geico, that's for sure. I think I will try to add the mystic rudder during the winter, less stuff in the water 'behind there'

besides that it's running again, more packs tomorrow , will report back then to let you know how it holds up :-)

[Basstronics]

And I did assemble them backwards... d'oh.

Desoldering braid to the rescue!

[millzee]

Can I ask why is it bad to remove the old ones as pictured and run it as pictured? What happens? What will go wrong?

EDIT: That is if they have all gone bad, not if they were still good.

RE post #45
NOthing

[drwayne]

And I did assemble them backwards... d'oh.

Desoldering braid to the rescue!

Yep, that's what my edumacated eyes told me.

The metal canisters containing the capacitor should not touch any power rails.. and all yours touched both red/black !
That's a nasty short out waiting to happen... kerBOOM.


Millzee.
With low loading the capacitor bank alternative ( post#1) was good.
Under more demand, as informed, the esc failed.
Have exchanged one my own to the bloke who purchased that esc s/h.. he now runs with big smiles regularly
- I do hope to infuse life back into this deceased.
This how-to thread will hopefully educate the unlearned away from such cremations.
W

[millzee]

[QUOTE=drwayne;

Millzee.
With low loading the capacitor bank alternative ( post#1) was good.
Under more demand, as informed, the esc failed.
Have exchanged one my own to the bloke who purchased that esc s/h.. he now runs with big smiles regularly
- I do hope to infuse life back into this deceased.
This how-to thread will hopefully educate the unlearned away from such cremations.
W[/QUOTE]

so a x450/3, neu 1527 1.5d 1500kv on 6s in a df35 pirate isn't high draw?

[millzee]

I found the answer to my part in this, post #9 at the botom
https://forums.offshoreelectrics.com/...wordfish-240hv

Played yesterday and won both games, we wear green so the white is not an issue!!

[maxmekker]

More testing today,and it's holding up nice.

Only issue is the 65-130c lipo's and the m445 prop. I only had one pair of 45-90c so I could not test that and the m445 to se if that had any effect.

6 min's clip ore skip to 2,00 to see the M445 run. Not sure why, maybe anybody have a theory..

[drwayne]

More testing today,and it's holding up nice.
Only issue is the 65-130c lipo's and the m445 prop. I only had one pair of 45-90c so I could not test that and the m445 to se if that had any effect.
6 min's clip ore skip to 2,00 to see the M445 run. Not sure why, maybe anybody have a theory..
[/video]

maxmekker should take this to the video thread so lots more ppl can see and admire and comment

I see&hear the boat at speed surging hophophophophop on the prop.
X series props are low lift, but still too much for yours... x642+x442 show this by hopping the backside around badly.
Or.. and at 2.19 that bent edge made me wonder..are the props not sharp ?....
This will kill the esc due Amp spiking as it loads/releases on the prop.
LMK W

ps.. Love the great vid work showing temps and props.. where are the girls watching and cheering ?

[maxmekker]

Haha you are to funny. :-)

Well I dont do my props , I got them all done from funrcboats . I know they should maybe be DT ore maybe eveen sharper , but I can't sharpen props for sh....

The one I have used mostly, well all the time infact (since , like you point out, the boat is heavy on the whawhawha hophophop etc ) is the M445, that makes MY geico the most stable. I normaly don't use the X props I have, they work wonderful on my FRIENDS mystic, the boat flies with the X642 prop, and almost zero hopedihophopedihophopedihop, but he has been lucky with the mold of his boat. No need to fix the transoms, and the rudder assembly is wery clean from proboat on mystic compared to that on the geico boat.

Anyway , as you can se, it wont run on the 65-130c + the M445. I did not have another 45-90c lipo pack with me to test if that had any cause, next time I will :-)

I will drive it like it is for the rest of the month, and then it's on the shelf, and I'll just get a new one next year.

ps: the girls were in the bush's behind me getting ready for skinny dipping, unfortunately the camera was low on battery :-\

[drwayne]

the 65-130 are heavier than 45-90 ?
Move them back in the hull to reset cog.

You need to reset your priorities.
Girls first, playtime rc boats last.

W

[Paul21]

Hi couldt find info in forum search so try here hope it ok. So plan on running 12s on 5692 730kv sf240hv pro twin setup and need to find out what is used to stop spark when plug in batts and now to install it tks

[drwayne]

Hi
2 ways to set up 12S ..

either 12S a side..eg 4 x 6S packs



or 12S shared eg 2 x 6S


Here's a deck mounted set
IMG_0324-1.JPG

Under the deck I place a piece of nylon cutting board ~10mm thick as support for the plugs.
I roughen madly before epoxy in place.
Drill through holes for main plugs + 1/32" for clearance
Insert presoldered plugs from inside hull, tape over top, invert hull and flood plug area with epoxy.
Wait 12+ hrs.
voila'.


The swordfish 240HV have an on/off switch.
The above picture show a deck mounted switch to remote this feature.
use a DPDT micro switch, remember to keep the 2 esc as separate entities at this switch. .

this diag shows wiring beneath the plug
. ___
esc1black---- |0 0| ----esc2black
esc1 red------|0 0| ----esc2 red
blank ---------|0 0| -------blank
.

[ray schrauwen]

How do you keep the momentary swich dry?

[drwayne]

How do you keep the momentary swich dry?

I flood with corrosion X before install and they last for ever ...

[ray schrauwen]

Very good!

Did you buy a 250A esc from alibaba? Someone "D. Wayne" bought one pending review. $108 + shipping or slow wait free shipping.

[justski]

ok new here what are the cap banks for what do they do ?

[tlandauer]

You might get a quicker answer by going back to the begining of this thread, I find this thread contains way more than just an answer to a single question.
Just a suggestion, please don't take it wrong, don't mean to be a smart a**.

[justski]

no problem ill go back i must of missed something ..thanks

[drwayne]

Very good!

Did you buy a 250A esc from alibaba? Someone "D. Wayne" bought one pending review. $108 + shipping or slow wait free shipping.

Im either Doc Wayne or Wayne S. !
Not D. Wayne, he is probably one of John's kin.
W

[drwayne]

ok new here what are the cap banks for what do they do ?

put your thinking cap on, and read this

https://forums.offshoreelectrics.com/...127#post448127

[jcald2000]

Doc, My cap's are coming in at 160 F (71C), should I add more caps?

[drwayne]

They're working hard !
What other temps do you have from that run ?
motor? leads? batts ?
any of those others in poor condition will quickly stress ( overheat ) caps.

extra caps may bot solve the complaint

Midnight down here in AU. will be back in 8 hrs !

[jcald2000]

Everything else is below 125F.

[drwayne]

Everything else is below 125F.

Damn !
Assuming
1. esc is not too small for your setup
2. timing is set right
and
3. motor is not 'free revving without load ' at 100% throttle . ?

yes..these caps need support !
What qty cells and what esc ? .. to offer some quantification of goodies required .

W.

[jcald2000]

8s2p Sport hydro003 (800x380).jpg

SF240 and Hyperion or Dinogy 5000's with 1527/1y

[drwayne]

8s2p Sport hydro003 (800x380).jpg

SF240 and Hyperion or Dinogy 5000's with 1527/1y

Wow. 313A max.
The caps are hot because the esc is working at 130% its design.

I recommend the set as per this link
https://forums.offshoreelectrics.com/...942#post447942

Use 63V 470uf as per that circuit.

make the capbank fit inline between esc and batteries as per this attachment.

inline 705uf.JPG

let me know the next log results.
W