Bike You Pedal With Your Hands And Feet

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Jan 212013
 
Bike You Pedal With Your Hands And Feet

 
Tell me that you don’t want one of these things!


Bike You Pedal With Your Hands And Feet

Bicycling can really be a pain in the legs. Your lower limbs pump endlessly to power the bike wheels over miles upon miles of terrain. Meanwhile, your arms just hang there doing little to nothing. The Raxibo Hand-Tret-Velo system evens things out, putting both your arms and legs to work toward cycling forward.

Raxibo is essentially a bicycle with a separate, arm-powered drivetrain that works in conjunction with the traditional pedal system. Cyclists use both their arms and legs to pedal forward. The idea of the system is that you can work your entire body during a bicycle ride, instead of just your legs. The system gets your arm, shoulder, chest and back muscles involved.

The specific mechanical details are a bit fuzzy, but it’s clear that the hand crank uses a series of chains and pulleys. A derailleur system channels both pedal and hand torque to the rear wheel. The system is adjustable and can be set to different arm lengths and preferences. The hand crank has a tilting action that steers the front wheel.

At first blush, we’d expect the extra oomph from the hand crank to add speed and climbing power. However, the system also adds some weight and repositions the rider in a more upright, less aerodynamic riding stance, so any benefit in terms of speed and pedaling power might be minimized or negated. The company doesn’t appear to make any claims about increased speed or power, so we’ll assume the main benefit is in the increased scope of exercise.

The Raxibo comes in five different frame colors and retails for 2,500 Swiss francs (US$2,617 as of publishing). The base version sits on 26-inch wheels, while an upgraded model with a 26-inch front wheel and 29-inch rear wheel costs 2,800 francs ($2,930).

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Joke Of The Day: Graduate Student Degree

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Jan 152013
 

Rubber ChickenWhat does a graduate student with a science degree ask?
“Why does it work?”

What does a graduate student with an engineering degree ask?
“How does it work?”

What does a graduate student with an accounting degree ask?
“How much will it cost?”

What does a graduate student with a liberal arts degree ask?
“Do you want fries with that?”

 

 

How A Slushie Machine Works

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Nov 052012
 

I like how this video says “Defies the laws of physics”.

ARVE error: need id and provider

A video explaining the workings of a slush machine and how it’s design manages to overcome several scientific problems.

 

Jul 302012
 

Hey, got an extra kid you want to get rid of? Well, you’re in luck, because some guy has gone and created a jet-powered go-kart! Just strap anybody you no longer want around into this thing and watch as they destroy themselves!

The go-kart is created Seth Kettleman, a used aircraft parts dealer who attaches jet engines to things as a hobby. The guy’s already built a genuine jet-powered Batmobile, but I guess that just wasn’t dangerous enough, so he moved onto go-karts. Currently Seth’s go-kart of death tops out at around 100 miles-per-hour, but don’t worry, he’s working on increasing that top speed.

Sadly, the Ebay auction for the jet-powered go-kart has already ended (somebody got a real deal at $8,100) but don’t worry, Seth Kettleman really likes sticking jet engines to things. If you ask reeeeal nice and pony up enough dough, I’m sure he’ll make you your own deathtrap. I’m sending him my designs for a jet-powered shopping cart as we speak.

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