The Z Torque Bike Crank-Breaking Laws Of Physics
 

Man, either these guys are really dumb enough to think that it works or they are trying to capitalize on other peoples stupidity.

Quite hilarious, even after a few good explanations written in the comments by actual engineers cant convince these guys that they are wrong.

http://s3.amazonaws.com/ksr/projects...jpg?1333317075

Z-Torque Bicycle Cranks - Ride Faster ! Longer ! Easier ! by Jason Coment — Kickstarter

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

Looks like an interesting idea, would love to see the studies that they did as well as some strength tests compared to a straight crank

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

all that he achieved was to actually shorten the crank.

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

haha this is hilarious. i'm not worried about it, there is simply no way they will hit their $50k goal and all money gets refunded if the goal isn't met. it's just funny how terribly flawed their list of advantages is. the only advantage would be aesthetics. it looks kinda cool, but there is no real benefit to it. kinda like studded belts, they look different but the studs don't hold your pants up.

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

Looks like something you'd see all polished up on a lowrider bike!

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

Garbage. Especially with the square taper holes for the bottom bracket.

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

Sheesh......

1-I can't believe people think this is, "The way to go in the future".

2-I can't believe people are backing this.

Then again, people here are constantly told they will need to use an external BEC for high torque servos in crawlers but yet try to prove everyone wrong.:shock::roll:
If these "bends" made any difference, it should also affect the way suspension links worked. Hmmm...maybe THAT'S why the top guys have great handling rigs!!!!! Now I have to go get longer links and bend them like pretzels......sigh.....

These cranks "look nice" but I see no advantage other than to employ some people and make your wallet lighter.
This is like saying, "I have color coordinated hi "C" LiPO packs, you need to spend 4x the money to get my packs!" and people saddle up & buy them.

Oh, wait.......we already get that..... :lmao::lmao::lmao::lmao:

Was it P. T. Barnum?, "There's a sucker born every day!"

PS, I like the typos in the company page. Not.;-)

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

ummm, I believe that's two 7's... not a Z. Dumbass!

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

Do people realize physics of a crank works point to point?

All this did was put a shape into the crank itself. The crank point is still mount to mount which is still a straight line.

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

Exactly.

Torque = Distance vector cross Force vector

You'd think with the word "torque" in the name of their product, they'd at least try to figure out what that means.

No need for further testing....didn't you see him try to break it by hand in the video? That proves it's strong!

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

Position Vector cross Force vector. I also believe we would need more than that. Position cross force gives the moment about a point; however, we want the torque about an axis. We would need the unit vector of the axis dot into the cross product of the position and force. This would give us the magnitude of the moment. Take magnitude of moment and multiply it by the unit vector of the axis for the Torque vector.

Or the answer could be waffles.

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

I've been trying to convince crawlers of this for years. Often I run offset rod ends or bent uppers. People think this changes the geometry, but all it does is change shape. The actual link is still rod end ball to rod end ball, bend the link to clear things. That does not effect the Eye-Eye measurement of the actual torque rod.

Shape doesn't equal physics.

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

Nope....the answer would be "42".....:lmao::lmao::lmao::lmao:

Oooopppsss.....wrong question.;-)8)

As stated, the "design" looks cool but is worthless at a minimum, dangerous at the extreme.8)

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

What you are talking about is moment of inertia. The two topics are (obviously) somewhat related (t=MOI x angular acceleration). However, what these guys were saying is that their design has increased power output from the rider (which essentially means they increased torque output from the rider). The shape of this design has nothing to do with torque output because of that cross product in the torque formula. It eliminates all portions of the force applied that are not perpendicular to the displacement vector.

To increase the MOI, they would need to concentrate more of the mass of this crank toward the pedals....and even then it would only about double the MOI.

I really think they are just throwing out terms that they don't know and hoping people will buy it...

I like waffles.

The angle must help with wind resistance, instead of a straight rod it now has a point which helps break through the on coming air.....:what:

For some reason I see a middle aged man trying to stand on his pedals coming down a hill only to have it break at the bend and well im sure we can all se where that goes....

Distance from a-b is just that doesn't matter what bends you put in between.

This is some funny chit. Some people....

Fat fingered from the phone- Corey

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

I agree, their design does not help.

I am not talking about moments of inertia. I am saying a moment of force that produces a turning effect or moment about a point. When I say moment it is interchangeable with torque. Moment in scalar form is simply Force times distance the same as torque. The process above holds true for finding torque about a specified axis.

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

These garbage cranks are just like skateboards from the 80's that had weird shapes and cut outs. They called them 'money bumps' and 'money shapes'. It's just for morons that want to buy something that looks different, no matter how poorly they perform. And the square taper bottom bracket has gone the way of the dinosaur. So even if the cranks were normal, they are still fuct!

Re: The Z Torque Bike Crank-Breaking Laws Of Physics
 

I'm not into bicycles in any way, shape, or form, but I keep thinking I've seen these or something like them before...