Lightened flywheel gone wrong.

[NicholasJackson]

I came across this while doing some research about lightened flywheels.

[fastivaB6TG25MR]

cool

[bhazard]

Guy still alive?

[NicholasJackson]

Guy still alive?

Yeah, luckily everything shot outwards from the car.

[PhoenixSHO]

How can a mass rotating in its center can be thrown in such a way that it does that?

I want replay in slow-mo please.

[91_festy_Gl]

Looks like someone forgot to torque the flywheel bolts!

[Clay]

How can a mass rotating in its center can be thrown in such a way that it does that?

I want replay in slow-mo please.

It is not just a mass rotating about its center. it is transmitting torque.

[kartracer46]

He is dam lucky the rotation of a 1.3 wasn't the other direction. That would have been a very bad situatuion. I have had racing clutches on my race kart explode and come through a very thin fiberglass seat. A car like that should almost have a shield installed like a drag car to prevent such accidents.

[Nerd Racing]

Flywheels do have a bursting speed, especially Cast Iron ones. I took a mechanical design class and we spent a couple classes on flywheel design. This is why I advise against lightening stock flywheels.

[blkfordsedan]

How can a mass rotating in its center can be thrown in such a way that it does that?

I want replay in slow-mo please.

A spinning object is under constant acceleration, i.e. changing velocity since the direction of motion is constantly changing. Inertia is constantly acting on the flywheel, causing every point on the flywheel to want to continue motion in the direction its travelling at any given moment. This force is not directed outward from the center, but rather at a right angle to it, since the direction of motion is always tangent to the arc of the path. Clear as mud? Think of it this way...

If you tie a rock on the end of a string and twirl it around over your head, you will feel the tension in the string. It will feel like the forces on the string are acting outward from the center, but if you let go of the string when the rock is exactly in front of you the rock will not fly out directly in front of you. Rather, it will fly off to your right or left, depending on the direction of rotation. Where the pieces of the flywheel go depend on what point during rotation they let go, but it will alway be at a right angle, never straight out.

[link5186]

^ nice anology. Nothing like a physics lesson coming from a serious failure like that. I love and hate seeing pictures like this. It's like a train wreck; you have to look.

Sent from the bathroom via crapatalk

[NicholasJackson]

I think the best way to explain it is this video.

http://www.youtube.com/watch?v=ivBs0DAL7Wo

[sasquatch]

http://www.youtube.com/watch?v=w-2KiubBNMQ&feature=related

[i218127]

Thanks for all the info everyone. I was going to put in a lightened flywheel when I replaced the clutch, but now will not do it. I forgot about the down side of the project.

i218127

[Ford Fester]

http://www.youtube.com/watch?v=w-2Ki...eature=related

^^^love this video, has watched it several times. That focus is fast