Skilifts.org / SORT Forum

A Miner-Denver tower. I had no idea that anyone besides Yan built 3-sheave assemblies.

liftmech, on Jan 29 2004, 07:11 PM, said:

Wacked indeed!! :) Sheesh our shacks vibrate if you throw a snowball at them... this one must be really bad!!

heres a random picture of some of the lower lifts @ marmot
3 lifts are actually visable in this picture.
closest in the fore ground is the vintage 1968 Tranquilizer double chair which i doubt has the original chairs.
Next is the 1990 Eagle Express Quad chair.
and last a few of the towers on the Eagle Ridge Quad are visable to the left of the breakovers on the Eagle Express.

all are doppelmayrs

Here is Lookout Mountain Express at Northstar@Tahoe. Note the extremely faded paint.

heres an awsome shot up the chair 23 lift line and the many intricacies of the YAN terminal.
photo credit goes to mammoth2002

Great shot! How much snow can that lift see in a year? That looks like a great deal of height adjustments on those terminal tubes.

I first I thought this was a ad for a winch cat (just a few bumps on that slope)

Mammoths first big fixed triple. Usually a three legged structure with chain for the counterweight rope. The bottom terminal was designed for large amounts of avalanche debris and the quick removal or grooming of ramp and loading areas before customers arrived. All legs are full of concrete and have electric winches.
YAN advertised these adjustable terminals for 10' + of travel. One of the biggest failures of engineers, insurance companies, and owners of this type and his adjustable top drive lift was to load test it in the highest positions. As the lift was raised in its higher positions, alignment and proper sheave loading became a problem. In lower positions it was found it was easier to add fill to the loading and ramp area rather than make many small position changes.
This lift has a unique unloading terminal that protects it from the wind. It was fabricated by Mammoth in their parking lot in two large curved pieces. Upper terminal picture somewhere in forums.

Ryan B

Ryan, it is a fixed triple lift. Here is the top terminal:

KZ: Lookout isn't that faded. It is only 3 or 4 years old. It is pretty much the same color I remember originally seeing it.


Holy crud! When did you take that picture! It actually has a full-blown line!!!!!!!
This post has been edited by CAski: 01 February 2004 - 04:43 PM

I didnt take it, i found it on webshots. Quite the picture if you ask me

How does chair 23 get that much ice on the inside top bullwheel?

i guess maybe through the open end of the terminal or through the open doors during the day

the bottom end of the building is open (the lift line) so wind blowing up the hill can get in.

Allan, on Jan 29 2004, 07:31 PM, said:

The shack structure is filled with concrete and is quite heavy. I found that out when repairing the old I-lift shack (now the top of Blackjack lift). I wonder if that was one of Kunczinski's cocktail napkin designs for which he's famous...

I imagine Chair 23's top terminal, even with the down-line side open to the wind, is still an improvement on having a traditional unprotected terminal. Can you shut doors of some kind after operation to fully enclose the terminal at night?

Yes, I believe the top terminal on 23 has doors of some sort.

LiftMech said:

3 sheaves???? How does it work?

like a four or two sheve assembly i assume.

No. It's impossible.

no it isnt.

No, it's quite simple if you think about it. It's just that most manufacturers didn't build one- I imagine because it's just one more inventory item to keep track of. You can put three two-sheave towers close to each other instead of two three-sheave towers; and two-sheave assemblies are a common inventory item.

A three-sheave assembly works like this: a two-rocker is placed on the short end of an evener bar, and a single sheave goes on the long end. The pivot point of the evener bar is in line with the centre sheave. You can see this in a six-sheave assembly; just imagine three single sheaves instead of three two-rockers.