50mph pedal bike

[moatilliatta]

BAd ass!!!

i want one!!!

[Slangbox]

Wtf? Let's think... You cannot get out more work than you put in. So obviously the bike must be starting out with a charged battery that's supplying power (since going 50 on a heavy bike is not possible with straight pedal power). So really what this is is an electric bike that makes you pedal anyway. For 40k. Cool.

[lowlightbw]

Wtf? Let's think... You cannot get out more work than you put in. So obviously the bike must be starting out with a charged battery that's supplying power (since going 50 on a heavy bike is not possible with straight pedal power). So really what this is is an electric bike that makes you pedal anyway. For 40k. Cool.

so much non genius in this post.

[Slangbox]

so much non genius in this post.

yeah i must be epically missing something. Please help me understand this.

[lowlightbw]

doi. it obviously uses the same shit that they use in star wars to make ships levitate.

[Slangbox]

doi. it obviously uses the same shit that they use in star wars to make ships levitate.

No seriously.. I do not understand the point of this bike. Explain it to me so I can be a genius.

[lowlightbw]

I would assume it transfers the energy you pedal into something more useful like 50x torque. google search and a genius you can become.

[Kruzen]

Haven't watched it yet, but you can alreayd buy a motor and mount it to a bike frame and get about 40MPH out of it and about 70 miles of range for ~300$

[Wh33lhop]

Haven't watched it yet, but you can alreayd buy a motor and mount it to a bike frame and get about 40MPH out of it and about 70 miles of range for ~300$

But you can't make the speed governed by how fast you pedal, for mad gangster status yo.

[Beach Bum]

I really do want to know the science behind it. I am intrigued.

[Slangbox]

I would assume it transfers the energy you pedal into something more useful like 50x torque. google search and a genius you can become.

I don't think so. Pedals+generator+battery+electric motor does not equal greater potential work (Force x distance). As in, the same amount of pedaling (work in) can only induce the same amount of work out. Yes, you could use the electric motor to boost the accelerating power (and power to fight friction during higher constant speed) of your pedaling, but you could not travel as far. It'd just be like down-shifting on a 10-speed.

For example, if a regular bike is traveling at 4km/h and the force of friction (internal+wind resistance) is, say, 4N, and it travels 1km, It has done 4000Nm of work. But if it is traveling twice as fast, the force of friction is likely to be more than 4 times as much (since wind resistance is exponential) and thus around 16N. Thus, traveling 1km at 8km/hr would require 16000Nm of work.

Therefore, to maintain a constant speed higher than the constant speed attainable by pedal power alone, there must be an alternate source of work in (a pre-charged battery). So again I say, the pedaling is just helping you use the electricity slower and increase your range. But you will run out of excess electricity eventually, and at that point you're pedaling a really heavy bike. A really heavy 40k bike.

[/fucking nerdiness]

If I've made a mistake, which is more than likely since I haven't been in physics for a month now and haven't studied it in more than 4, please inform me. I'm not trying to be an ass, I just got started and couldn't stop :-(

Edit: I predict, with my crystal ball, a "TLDR"

[Beach Bum]

It's got a battery. This force multiplication crap is nonsense. Go look at the PDF on ErockIT.net.

[Slangbox]

It's got a battery. This force multiplication crap is nonsense. Go look at the PDF on ErockIT.net.

Thank you for finding that. I rest my case. The pedaling is to "give the impression of supernatural powers" (PDF, pg.5). 40k to play superman.

[Moto-Mucci]

Pg.6: "It's a perpetual motion machine."

Let me know when they make one with a battery operated pedaling machine attachment.

Otherwise I'll take a Puch Magnum Cafe Racer for <$1k.

[h0lmes]

Haven't watched it yet, but you can alreayd buy a motor and mount it to a bike frame and get about 40MPH out of it and about 70 miles of range for ~300$

Watch the vid, this particular bike is different. There is no gas motor, just an electric one powered by pedaling.