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Old August 8th, 2012, 02:43 PM   #21
mschaffer66
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Lipos come in several different c ratings and mah capicty. The higher the c rating the stronger the punch is off the line. The higher the mah rating the higher the run time!
And boats LOVE high C ratings. Strike that...boats NEED high C ratings.

I was never a battery snob and when you are only running things like 1/10th scale it really doesn't matter what battery you have(for the most part). But when you really start pushing things hard with boats you need good stuff or you are just going to puff packs every time you go out.

Boats put such a bigger draw on the electronics and batteries than cars do. Getting my cat up on plane would max out my 150A data logger, then settle down into the 80A range running.

Even my little mini boats were brutal on the cheap batteries. I puffed so many Turnigy/Zippy packs while I was doing boat stuff. Yet my Hyperion packs lived through cars, boats, and sitting for well over a year without a charge.

Out of all of the RC I ever did racing stock Slashes at Larry's was the most fun and running boats was a close second.
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Old August 8th, 2012, 03:20 PM   #22
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I owned Larrys track with my JRX-T when I was like 11......when my mom would drive me out there. Good times.
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Old August 8th, 2012, 05:47 PM   #23
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i'd like to have a slash... would be fun.


If you want to run r/c boats in rough water, gas is the way to go, its a more expensive startup cost but its nice to be able to pull the boat in, refuel it and head right back out.
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Old August 8th, 2012, 06:20 PM   #24
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Quote:
Originally Posted by LS6454 View Post
Lipos come in several different c ratings and mah capicty. The higher the c rating the stronger the punch is off the line. The higher the mah rating the higher the run time!
Thats actually incorrect. The C rating is only related to max load the battery is able to sustain. If you have a high demand setup (like boats, which tend to spend all their time at WOT), then a higher C rating is called for.

Off the line punch is directly related to Voltage (which is why LiPo has such great punch, they don't drop voltage under load the way NiMH does), and the MaH is essentially just run times, as you said.

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i'd like to have a slash... would be fun.


If you want to run r/c boats in rough water, gas is the way to go, its a more expensive startup cost but its nice to be able to pull the boat in, refuel it and head right back out.
You could just as easily spend a little more up front, and get a few batteries, and keep them charging in rotation. With about 3 batteries, you can keep them in rotation and run almost non stop.

No nasty nitro mess, no accidental spills into our lakes and rivers, and easier to maintain. Win win win.
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Old August 8th, 2012, 07:13 PM   #25
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I run a 42" deep V, sporting 2 traxxas spartan motor/ESC combos, and 4 10500mah 2cell lipo packs... Hull is sealed. It's fun to jump waves with.
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Old August 8th, 2012, 07:39 PM   #26
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If you really interested in rc boats get ahold of this guy. Keith really knows his stuff when it comes to boats. He will custom build you anything you want.

http://fightercat57.freeforums.org/k...read-t662.html



C rating is how much you can pull from the lipo. The higher the C rating the higher the discharge rate. So if you have a 50C lipo you can pull 50 times the
capacity of the pack. Therefore giving you a higher burst .

Last edited by LS6454; August 8th, 2012 at 07:47 PM.
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Old August 8th, 2012, 07:39 PM   #27
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Quote:
Originally Posted by Guitardrumr View Post
Thats actually incorrect. The C rating is only related to max load the battery is able to sustain. If you have a high demand setup (like boats, which tend to spend all their time at WOT), then a higher C rating is called for.

Off the line punch is directly related to Voltage (which is why LiPo has such great punch, they don't drop voltage under load the way NiMH does), and the MaH is essentially just run times, as you said.



You could just as easily spend a little more up front, and get a few batteries, and keep them charging in rotation. With about 3 batteries, you can keep them in rotation and run almost non stop.

No nasty nitro mess, no accidental spills into our lakes and rivers, and easier to maintain. Win win win.

Mike used to keep a charger in his car so he could recharge as he was using up the next set of batteries. It will be harder to find a place to run your boat if it's loud.
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Old August 9th, 2012, 06:32 AM   #28
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Quote:
Originally Posted by Guitardrumr View Post
Thats actually incorrect. The C rating is only related to max load the battery is able to sustain. If you have a high demand setup (like boats, which tend to spend all their time at WOT), then a higher C rating is called for.

Off the line punch is directly related to Voltage (which is why LiPo has such great punch, they don't drop voltage under load the way NiMH does), and the MaH is essentially just run times, as you said.



You could just as easily spend a little more up front, and get a few batteries, and keep them charging in rotation. With about 3 batteries, you can keep them in rotation and run almost non stop.

No nasty nitro mess, no accidental spills into our lakes and rivers, and easier to maintain. Win win win.
no sir, not nitro... gas

http://www.bhhanson.com/
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