Skalabala
1 kW
Hi members 
This looks like fun. I like the motor(s) Said to be 3,27kw/kg
[youtube]zI0TNk5gLbU[/youtube]
This looks like fun. I like the motor(s) Said to be 3,27kw/kg
[youtube]zI0TNk5gLbU[/youtube]
Cool go kart :D
- Thread starter Skalabala
- Start date
dingoEsride
100 kW
Love go carts with their low c o g and responsive steering but not a fan of two stroke, these will pave their way into the future of indoor carting
liveforphysics
100 TW
Skalabala said:Hi members
This looks like fun. I like the motor(s) Said to be 3,27kw/kg
[youtube]zI0TNk5gLbU[/youtube]
I had the pleasure of sharing a pit with an electric kart that appeared to be much lighter, get much better traction, and accelerate much more quickly than the kart in the video (though maybe the kart in the video is just geared tall.)
Hillhater
100 TW
Two very different "types" of kart.liveforphysics said:
The first is (was) a "sprint" kart, purpose designed for short circuit tracks... The typical purpose built kart tracks like you might see in Europe.
The white kart is a " long track" design , intended for higher speed full sized circuits like Laguna etc. And yes , much "taller" gearing needed for that.
Both look like very professional conversions, but they probably could have made a better, lighter, battery choice for the first kart, ...looks like a pack of 18s, 6p Headway 10ahrs cells on each side.
So probably 75 kg of cells in total !
doctorGONZO
100 W
What are the rules about wheel diameter in karts?
Hillhater
100 TW
Regulated Sprint karts, ( most karts up to the 125 cc international class), run 5" dia rims, 8" wide,. 11" OD tyres in the rear.doctorGONZO said:
The bigger engined gearbox class karts and long track karts run 6" dia rims.
Rim material varies from cast aluminium, spun alloy, to magnesium and CF.
Skalabala
1 kW
Dauntless
100 TW
Don't know what batteries those really are, or how volatile they might be. But this configuration reminds me of the time when autoracing experimented with sidepod fuel cells. A very explosive era.
When gokarts race, the wheels of one regularly bang into the side of another.
When gokarts race, the wheels of one regularly bang into the side of another.
Skalabala
1 kW
riba2233 said:
They really old and heavy? How about the 40160S?
Hillhater
100 TW
I dont think they would be suitable.riba2233 said:
Their pack is capable of 750 amp bursts, and 260volts
so even using 18650's capable of 30 amp burst, it would need a 25p arrangement to provide that power.
and 25p of 18650 weighs more than 3p of those headways !
Best option would be the nanotech lipo.
liveforphysics
100 TW
Hillhater said:
That long-course kart does use RC LiPo. I think it's a 3.5kWh pack of 50C discharge cells IIRC.
Hillhater said:
No way that 3p of those headways can provide 750a! And those 18650 cells have much stronger bursts, have you seen the samsung 25r datasheet? 30a is continuous rate, but with some kind of cooling system. Also, agni motor cant take even near 750 a.
Lipo would still be better option, yes.
Skalabala
1 kW
Won't 18650 be more expensive and trouble?
Hillhater
100 TW
riba2233 said:
Actually the Samsung data sheet gives the 25R continuous rating as 20Amps,!.. and even at that it hits 95 deg C within a few mins, so yes, a cooling system would be needed. More unnecessary weight that is not realistic on a Kart.
Skalabala said:
Expensive - for that quantity, no; trouble however - definitely
But it's worth it, because in the end you have a pack that is three times smaller and only half the weight of lifepo4.Hillhater said:
Ok, still enough for angi. 3p headway hp is around 300 A cont, and 12p samsung 25r is 240 A cont, or 300 if you count 25 A per cell. Or 360 A if you use sony vtc5, but that's more expensive option.
Weight - 3p headway - 1 kg, 12p 18650 - 540 g. (cells only for each case). So you can use 14p 18650 to match the current rating, and still have pack that is much lighter
PS. we could rate headway 80 A per cell continuous, according to this page:
http://www.eclipsebikes.com/headway-lifepo4-38120hp-p-1094.html
Which makes it the same as samsung 25R. You also get greater capacity with 18650 (24Ah vs 30 Ah)
Hillhater
100 TW
They claim each of their modified motors will draw 400 amps .
And they have a 600 amp controller
Better think of a really effective cooling system for that pack !
And they have a 600 amp controller
Better think of a really effective cooling system for that pack !
that sure looks like fun tho.....
Hillhater said:
If system voltage is 260 V, then agnies must be connected in series, which means that battery pack only has to be capable of 400 amps.
700 A might be only the motor current (not battery current), but I highly doubt that. Agni has it's limits.
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