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Search: Posts Made By: Ratrunner
Showing results 1 to 25 of 33
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Forum: Speed - Electric
05-31-2016, 09:22 PM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

That esc is way overkill for this little boat. ...

That esc is way overkill for this little boat.

You need more close to 30A.
I have a 30A Turnigy marine ESC in mine.


And that motor is way too expensive.

Try this one.
Forum: Speed - Electric
11-07-2012, 03:55 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

yeah, when i said puffy, i didn't mean it's totally puffy, just that you can definitely see a little swelling, and it's very warm after a run (about 5.5 minutes)

Jason.
Forum: Speed - Electric
11-06-2012, 03:53 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

1, yes it's possible that now that the cut off is set up, you are not drawing as much and therefore not charging as much.
remember that most manufacturers rate the capacity of a pack at 1C discharge...
Forum: Speed - Electric
10-03-2012, 04:46 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

i have XT60's on all of my RC stuff with the exception of my crawler. still have a Tamiya plug on that.
as it's super low current, it works fine.

i even use the XT60's on my 12S lipo powered...
Forum: Speed - Electric
09-21-2012, 07:13 PM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

the tamiya PC paints will work fine on the boat. i am unsure of others that would work.

i have decided that i will paint mine, but haven't done so yet....

Jason.
Forum: Speed - Electric
09-11-2012, 05:52 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

with both motors on 2S, the following applies

the 2900 kv motor would be way slower than the 4450kv motor on 2S

KV is a reference to the motor RPM per volt.

so on 2S the 2900KV would max out...
Forum: Speed - Electric
09-11-2012, 03:56 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

the higher C rate for the battery the better (especially so with boats). no harm can come from running even a high 100C + battery.
Forum: Speed - Electric
09-03-2012, 02:23 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

cant help with the other problems, but how ,much water are you getting inside after a run ?

i get 4-5 minutes per battery pack, and there is always a little water inside.
maybe 30-50 ml. not...
Forum: Speed - Electric
09-02-2012, 06:27 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

it doesn't matter which way you connect things with the water cooling system.

you could connect the motor first or the esc. and you are correct, there's no In or out on the ESC.

Jason.
Forum: Speed - Electric
09-02-2012, 05:54 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

double post...

Jason.
Forum: Speed - Electric
09-02-2012, 05:52 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

the ESC wont  "suck water"  it has to be forced through by the action of the motor.

on a regular boat, the water pick up is on the rear of the boat, and water is forced though as the boat moves...
Forum: Speed - Electric
07-29-2012, 04:59 PM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

that's spot on also.

some of us have chargers that can handle up to 20A charge rates, so we can charge at those higher levels.

as has been stated here, always follow the manufacturers...
Forum: Speed - Electric
07-29-2012, 08:02 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

http://www.commonsenserc.com/page.php?page=c_ratings_explained.html

here's a link that explains it.

the c rating is dependant on the capacity of the pack.
that's what the "C" stands for...
Forum: Speed - Electric
07-28-2012, 07:25 PM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

another thing to consider with C ratings...

the C rating is referenced from the capacity of the battery.

so a 2000mah 20C battery can handle 40000mah load (or 40A constant)
while a 2500mah 20C...
Forum: Speed - Electric
07-27-2012, 07:17 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

that's the exact same motor i have in mine.

on 2S, it will work well, but beyond about 75% throttle, it will just make more noise.

i have the 35A Turnigy marine ESC in mine, and that's been...
Forum: Speed - Electric
07-15-2012, 02:55 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

i took the boat out for a run today at parramatta river.
i took the opportunity to try running 2x2S packs in parallel to see how that would change things.

as expected, run times were greatly...
Forum: Speed - Electric
07-05-2012, 03:19 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

my boat weighs in at 520g

battery at 134

i have the 4800kv motor and 35A turnigy marine ESC and i micro servo on the rudder.
plus a traxxas water proof rx box.

battery is a turnigy nanotech...
Forum: Speed - Electric
06-01-2012, 05:49 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

That termination voltage is a settable function on my charger. It can and does balance properly at that level. <div>
</div><div>The charger is a Hyperion EOS 0720I SD3. Quite a mouthful to say (and...
Forum: Speed - Electric
06-01-2012, 04:25 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

as Sundogz said, most all lipos can be charged at 1C very safely.
the nanotech's im running in the boat say 8C max charge rate. that would be up to 17.6A , assuming your charger can go that high...
Forum: Speed - Electric
05-31-2012, 03:17 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

for batteries, i run 2S 2200 Turnigy Nanotech 35C (70C burst) i get about 5 minutes run time, and the battery still gets kinda warm after a run.
i have now bought a few more of them (4 in total...
Forum: Speed - Electric
05-23-2012, 02:28 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

only concern i might have is that the electric motors make 100% of available torque at zero rpm,
where the nitro motor has to get to high RPM before it makes any real torque at all.

this can be...
Forum: Speed - Electric
05-13-2012, 01:47 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

can't answer the melting ABS question, but i wouldn't mind seeing a nitro powered one !

what size engine ? 15 ? 18 ? larger ?

Jason.
Forum: Speed - Electric
04-10-2012, 05:15 AM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

the paints that most people seem to be using are the tamiya PS paints.

i certainly will once i have decided on a scheme.

Jason.
Forum: Speed - Electric
04-09-2012, 06:45 PM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

i love the Red Bull paint job.

i still haven't decided on a scheme for my boat. i removed all of the original painted on decals,
in preparation for a custom paint scheme, but so far it's still...
Forum: Speed - Electric
04-02-2012, 06:17 PM
Replies: 3,285
Views: 607,359
Posted By Ratrunner

RE: Unofficial

im running a 4800kv motor on 2S and it goes very well.

Jason
Showing results 1 to 25 of 33
 
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