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Old 08-25-2005, 12:34 PM   #11
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With lithium cells, they are very light (about half te weight or less) compared to any of our race packs now.

I found a lipo pack that would stock 5000 Mah, at 11.1V, and was rated for crazy discharge rates. All that power, at only what they claim to weigh only 47% of any "conventional" 3300 race pack.

Now that you have a refrence on the power to size/weight ratio.. i'll let you in on one more important aspect of them.

Lithium Polymer cells can be very dangerous. they are very sensative to impact, heat, and/or over charging.
If you risk overcharging a Lipo pack, you might as well just put a small flash grenade in you're pit box.

As far as impact.. this would be very uncommon, but just think of if someone forgot their battery hold down bar, then managed to hit an immovable object hard enough. the cells would either stay in the car, and you wouldn't have anything salvagable on that chassis, or they would be ejected. causing a lot of harm to something, OR SOMEONE.

i don't think Lipos are a good choice for outdoor racing. not until they've been made safer.

Hope this helps,
Jonathan Kennedy

P.S.--> Continue 7-cell discussion?
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Old 08-25-2005, 06:39 PM   #12
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lipos are not as dangerous as everyone makes them out to be... i've been using them for almost a year and the plane and heli guys have used them for a long time now... i do a lot of rc stuff and i've never seen a lipo go bad but i've seen a nimh pack blow up and almost take someones eye out... its all in how u use it, if you abuse something its bound to break... btw both me and my frind have had lipo packs fall out of cars as well as get draged and both packs were fine... lipo is the future and the future is here, everyone says they have to be this or that and the next but i think they're fine the way they are now... you can never make something idoit proof, a better idiot will always come along.. lol
Abiye Birku
Tamiya TRF 801x | TRF 511x | TRF 201x
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Old 08-25-2005, 10:35 PM   #13
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I have had a 3-cell lipo fly out of my mini-t,and the exploston put about a 4 or 5 inch deep crator in pavment. sure, it was rare.. but it CAN happen. i was just lucky the pack didn't take anything expensive with it when it ejected itself from the car, and that nobody was nearby. Please.... take it from someone who's had it happen to THEM.

Jonathan Kennedy
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Old 08-26-2005, 08:42 AM   #14
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jonathan.... The is NO way it put a 4 inch crater in the pavement. It might have turned the pavement a color but it did not put a crater there
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