How a pull-through is accomplished...

Friday, February 23, 2001 6:06 AM
Anyone know how a pull-through is physically accomplished...especially on very large hills like MF or very tight/twisted elements like on Talon?

It would seem to be somewhat difficult, due to the need to have the rolling stock go through this process VERY slowly (stopped at times), and not having breaks of thier own.

I have seen pictures of a crane being used for this purpose, but depending on where they want the car to stop, seems difficult to pull some distance, secure the car somehow, move the crane, pull up a hill, upside-down through an element, etc. while being safe.

Can anybody add details on this?

Friday, February 23, 2001 8:22 AM
You've pretty much got it. All they use is a crane and pulley so the cable is pulling from the front rather than from above or the side. They either use clamps or tiedowns or something of that sort to secrue a car while moving the crane. With MF, I believe they used the lift to get it up and the 300'+ crane to bring it down.

Scott W. Short
Friday, February 23, 2001 8:23 AM
It's done through a combination of cranes and winches. In the photos I just posted of the Millennium Force construction ( ) there are several shots in one stage. Also, if you check out the time-lapse video clip, you can see the car being pulled over the first hill and through the first turn.

In those photos on the gallery link above, you'll see one photo where the bumper on the front of the car has been replaced with a hook, where the cables are attached. The car is always secured to the crane or the track from the front or back, so it's a pretty slow, boring process.

Keep in mind that they don't do the entire train at one time, which would be rather heavy to be maneuvering about.

Webmaster/Admin -
Friday, February 23, 2001 10:30 AM
To do it right, the train should be secured at the front AND the rear through the whole the front to do the towing, and at the rear to keep it from running away...

--Dave Althoff, Jr.
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Friday, February 23, 2001 11:19 AM
Is this done on all steel coasters?

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