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- SayeSayno, on 04/27/2009, -0/+104http://www.youtube.com/watch?v=WZ1eMYdLKrs
- Awwzm, on 04/27/2009, -0/+44TRON
- StigNordas, on 04/27/2009, -7/+45Considering all the torque that thing makes at any RPM, it would probably rip your arms off.
- Shaggy6ster, on 04/27/2009, -1/+37Even more impressive is this:
"The bike can be fully charged in four minutes and is charged by wind-powered generators."
Four minutes? I sure hope Tesla is paying attention. - frontaxle, on 04/27/2009, -3/+31I'd put some baseball cards in the spokes to sound cool at least. That was eerie!
- BridgeBurner, on 04/27/2009, -13/+40168 mph can hardly be called "jaw dropping". And how does a skydiver experience 3g in freefall? Aren't they experiencing exactly 1g?
- gizram84, on 05/30/2009, -0/+25the article never says that while free falling you'll experience 3g's. it stated that with this bike, you will experience 3 times what a skydiver would experience; hence 3 g's
- pegothejerk, on 04/27/2009, -0/+23Injuries are now 5x's faster!
- SniperZ, on 04/27/2009, -3/+25fully charged probably means enough juice for the 8 second 1/4mile run...
- AFGUnit106, on 04/27/2009, -2/+23uhh considering he just drove it and it didnt rip his arms off,
no. - cyrix, on 04/27/2009, -0/+21It's a drag racing bike. It's not going to be used for getting around town...although that would be a really badass way to get groceries.
- dystra, on 04/27/2009, -0/+19was i the only one waiting for him to lose control in that burn out and crash into a van?
- individual61, on 04/27/2009, -1/+19"All this gives the driver a G-force three times more than that faced by a skydiver during freefall!"
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...................................,<`.._|_,-&``................`\ - cgrado, on 04/27/2009, -0/+12Actually, it said it could do seven quarter mile runs.
- gizram84, on 05/30/2009, -0/+12he is right that while free falling you would be experiencing 1g, but he is wrong in telling everyone that the article stated such.
- Spikito, on 04/27/2009, -1/+12thats 168 in the 1/4, making it a 7 second bike
- dougmc, on 04/27/2009, -0/+10What that probably means is that the batteries used by the bike are capable of being charged in 4 minutes -- and indeed, I think the A123 batteries can be.
But to charge the bike itself in 4 minutes would require a massive amount of power and a big honking charger and wiring harness. Doing the math, the batteries hold 9.1 kWhr, so to fill that up in 4 minutes would require 137 kW. Their listed charger only provides 12 kW, so I don't think they actually charge it in 4 minutes -- only that the batteries are capable of it. (This thing is mostly a big advertisement for the batteries.)
And as for wind-powered generators, OK, so they pay the electric company a little extra to let them pretend their stuff is powered by wind power, when in fact it comes from the same electric grid as everything else. Big deal. Lots of businesses (and people) do that. - DiggMasterJ, on 04/27/2009, -0/+93:23 is where you want to start the video.
- inactive, on 04/27/2009, -0/+9Did you even look at it? There is a video...
- pegothejerk, on 04/27/2009, -1/+9You always have to badmouth everything I do, Mom!
- slyzxx, on 04/27/2009, -1/+8White zombie uses the similar system
http://www.youtube.com/watch?v=1Fmy4tWvr8c - fangor, on 04/27/2009, -0/+7No, that's not the case at all. Low Earth Orbit (where the shuttle usually goes) is only about 100 miles away from the surface of the Earth, which is insignificant compared to the distance from the surface of the Earth to its center. The reason that things appear weightless in orbit is because its tangential velocity of the object in orbit with respect to the surface is equal to (in the case of a circular orbit) or greater than (in the case of an elliptical orbit) the velocity at which it is falling.
- seaDragon, on 04/27/2009, -0/+7IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIITTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT
- lothar250, on 04/27/2009, -2/+8Also, KillaCycle sounds really lame.
- mattharvey716, on 04/27/2009, -0/+6or what it probably means is that it can do 7 1/4 mile runs like the article says
- starfishsystems, on 04/27/2009, -1/+7You've got it, just needs a bit of fine tuning. The point of free fall is that zero G force is being experienced. Things in a free-falling capsule will tend to float around weightlessly. You could be in free fall over Neptune (which has 17 times the mass of Earth) and you would still experience 0G despite the higher gravitational acceleration, because everything in the capsule is being accelerated equally.
- skintigh, on 04/27/2009, -1/+7"All this gives the driver a G-force three times more than that faced by a skydiver during freefall!"
ZOMG! Three times zero!!!! That is way more zeroey than regular zero!!!!!!
Maybe they meant 3 times the force a skydiver "faces" when standing on the ground? Or of any object? Or maybe they meant three times the acceleration of any object when dropped?
Why don't they just say 3 Gs? - schmitey, on 04/27/2009, -1/+7"All this gives the driver a G-force three times more than that faced by a skydiver during freefall!"
WTF?!? That's apples to oranges. Free fall you accelerate gradually with gravity and then get jerked to a halt by the shoot. Drag racing is entirely the opposite and you get G's during acceleration and if you brake hard. - EtherGnat, on 04/27/2009, -2/+7"a skydiver experiences NO acceleration"
WTF are you on? A skydiver most certainly experiences acceleration from the moment they step out of the plane. If they didn't they would continue to hover right next to the plane. I think you need to look up the definition of acceleration--in essence it's the rate at which an object changes its velocity. - crazymaster16, on 04/27/2009, -3/+8The title and the description/in the site/ seems really interesting, but i cant believe that this bike is so fast
- thesonofdarwin, on 04/27/2009, -1/+6Motor blows up? Are you referring to the term "burn out" by chance?
- swordedge, on 04/27/2009, -0/+4I remember seeing the record breaking drag race on TV. IIRC, he doesn't just use one motor, It's more like two or three. In other words, he does things to overcome the lowering of torque and other problems. As I understand it, this bike automatically shifts things around with the motors as it accelerates
Oh, and they did something that no professional drag bike can do without serious risks to rider... made a second run less than two minutes after the first. Professional drag bikes require engine rebuilds and the like between runs.
He is, as I understand it, building a 1000 HP version. This one just may be able to beat Pro Stock Motorcycles (they do the quarter in around 6.9 seconds, about a second or so faster than Killacycle)
I found a Tesla chart.
http://www.teslamotors.com/performance/acceleratio ...
The torque is steady to about 6000 RPM, then it dropoff at a inconsistent rate. I plotted some approximate data points from Tesla's own chart in excel. It gave me an equation:
torque = -0.0203x + 325.36.
This translates to 0 at around 16,000 RPM. They limit the car to 125 mph. I found a page that could calculate speed for final drive ratio's and when I entered the Teslas 8.28 to 1 with a gear ratio of 1 to 1, found that 121 or so is the 14000 RPM listed as the motors max.
In short, running Killacycles motor(s) at 20,000 RPM doesn't mean anything. If you ever could, the bike would probably be doing 300 mph plus.
The rpm vs speed chart for the Tesla (you don't really think the Killacycle guy is going to give us the details anytime soon do you?)
http://www.car-videos.net/tools/speedrpm.asp
and the Tesla that I entered http://preview.tinyurl.com/dkoa8x
The Tesla list final drive ratio at 8.28 to 1 and 225/45R17 rears.
RPM Mph
1000 8.7
2000 17.3
3000 26.0
4000 34.6
5000 43.3
6000 52.0
7000 60.6
8000 69.3
9000 77.9
10000 86.6
11000 95.2
12000 103.9
13000 112.6
14000 121.2 - fangor, on 04/27/2009, -0/+4No, in freefall, gravity is accelerating you at 1g. When you hit terminal velocity, gravity is still accelerating you at 1g, but the force of wind resistance has balanced the gravitational force, so your net acceleration is zero.
- kkthxbye, on 04/27/2009, -0/+4Take a second look at the page.
- ahlatimer, on 04/28/2009, -0/+4You probably didn't get to 181 in a quarter mile, though, and I seriously doubt you could do 0-60 in less than a second. It IS impressive that it's entirely electric and that it's getting up to 168 that fast. It's not going to beat gas powered drag bikes, but that doesn't mean it's not one hell of an accomplishment.
- dougmc, on 04/27/2009, -3/+7During freefall a skydiver (from his own point of reference) experiences somewhere between 0 g's (right after jumping out of the plane) and 1 g (at terminal velocity.) And he'll feel several g's of force when he opens his chute. So 3x what a skydiver experiences in freefall is somewhere between 0 and 3 g's. (Of course, things will appear differently to those observing from different points of view.)
If you do the math, 0 to 60 mph in one second gives you an average acceleration of 2.7 g's -- so 1) the comparison they gave is actually correct, and 2) they probably just compared it to skydiving to make it sound cool(er). - sockpuppets, on 04/27/2009, -0/+4That'll buff right out.
- Snoogs, on 04/27/2009, -0/+4i'm sure they're not doing that in the quarter mile though, since it's an electric bike... Infinity miles per gallon (when you keep it charged) Yes, some of those freak 1500HP bikes will do the quarter mile in upper 5's, but come on, a little appreciation?
- belyle, on 04/27/2009, -0/+4125 isn't exactly the same as 168, now is it?
- pmacATTACK07, on 04/27/2009, -0/+4The real question is whether or not this meme will ever die. In 20 years will be people still be saying, "haha, yeah but will it run Crysis?!"
For the love of all things 4chan, I hope not. - gerrylazlo, on 04/27/2009, -0/+4F=MA
F/M=A
Force is initially 1G downwards effective since wind resistance is 0. Speed increases.
The opposing force of air resistance rises until it equals the force of gravity (terminal velocity)
At that point there is not effective force on the object, and speed is constant (more or less).
Therefore acceleration is the highest right after they start to fall, and is 0 when they hit terminal velocity.
So YOU STFU for reals, yo! - calypsoschnitzl, on 04/27/2009, -1/+5Wrong title, should say 'from 0 to 6 feet under' in under one second.
- Brizzyce, on 04/27/2009, -0/+3Yeah? Well I bet yours wasn't battery-powered.
- frequentFlyer, on 04/27/2009, -2/+5I think it'll be charged in four minutes enough for a quarter mile run. Tesla is going for endurance. But, yeah, they should compare notes.
- AlKo, on 04/27/2009, -1/+4Loved seeing this again.
It takes a trained and experienced rider to handle the power of a drag bike... - inactive, on 04/27/2009, -0/+3nothing really until 1:12.
that thing sounded like Darth Maul's Sith Speeder! - CrazySpaniard, on 04/27/2009, -0/+3seriously?
this is basic physics here. - CrazySpaniard, on 04/27/2009, -0/+39.81 m/s²
- alphaterminus, on 04/27/2009, -0/+3oh the irony
- realstupidity, on 04/27/2009, -0/+3AWESOME!!!!
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