Skier, on 24 August 2009 - 04:26 PM, said:
The separate drive and detachable terminal was a design that Poma and Doppelmayr both used for a few years. I think Poma did market some fixed grip Alpha lifts as having the ability to be upgraded to detachables by adding new grips and detachable terminals while keeping the Alpha drive in place. I'm not aware of any cases however where the detachable components were actually added at a later date.
Something that should be clarified on the Falcon lift:
The Falcon chair was originally installed in 1985 as a fixed grip quad. One year after the installation, the Falcon chair was modified by Poma with new line gear and grips, I believe. Originally, the lift was not installed with the proper line gear to be a detachable so it had to be replaced. As for the motor and gearbox, I'm not sure if they were replaced or not. If you look at the bottom terminal, you will notice that there is a separate bullwheel support system, as it used to stand alone.
As far as I'm aware, this type of terminal was available with the overhead Alpha drive or a vault drive. (like Copper's American Flyer) I believe Falcon was the only lift like this ever modified. This design came before traditional overhead drive terminals. Until that time, detachables were all vault driven.
At Snowmass, Big Burn has the next step toward a modern overhead drive. It's basically an alpha terminal positioned on top of a Falcon detachable terminal.