145 replies to this topic

[edmontonguy]

I thought that the norquay double was a doppelmayr or does it just have doppelmayr chairs?

[floridaskier]

Why would a resort buy an HSQ, not install it, then buy another HSQ 4 years later? Maybe they cancelled the order or something

[SkiBachelor]

I think I know why. That's when ASC bought S-K-I LLC, which owned Bear Mountain, and ASC canceled the order and sold the resort to Booth Creek the year after or something.

[edmontonguy]

Here is the Snow valley t-bar. Towers 2 and 3 are visable with the unload being right under the 3rd tower. the bulwheel is about 50m back from the ridge. These towers are odd and i wonder if any other Doppelmayr t-bars have them?

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[Allan]

Those are exactly the towers we have, we don't have the catwalks though. I've seen them with the catwalks before though. I wish ours had them... to do any work on the sheaves you have to stand out on the haul rope & sheave assembly.

[edmontonguy]

Going along a common theme here is the Edmonton Ski Club's T-bar. It is one of the older lifts i believe in the Edmonton area. I think it is a Mueller judging by the upper breakover tower. Again it is a very short lift having 4 or 5 towers and terminating in a fixed bullwheel assembly just short of Connors road (majour downtown access artery). It also looks to have had winch attachments added to the towers as a retrofit.

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[vancouverguy]

Here are some pictures of the chairlift at Shames Mountain, BC. It appears that the lift- the Blue Chair- has been retrofitted with a new bottom terminal and chairs (Borvig?), altough the towers are still Mueller.

These pictures can be used on the the site, as they were taken by a friend of mine.

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[vancouverguy]

Again,

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[vancouverguy]

And, finally:

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[Allan]

Those look like newer Mueller chairs... Do they have the double grip?

[vancouverguy]

I don't know, but it is possible that the lift is a late model Mueller.

[orangegondola]

That's a Borvig/Partek

[Dr Frankenstein]

I think the chairs are Borvig. The towers are probably Müller.

[liftmech]

Here is another of Yan's interesting designs- tower 2 on R-lift. Could anybody explain why the cap is offset so the heavy side is higher than the light side?

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[Whistler]

Dr Frankenstein, on Feb 26 2004, 02:19 PM, said:

I think the chairs are Borvig. The towers are probably Müller.

probably Mueller? look at them! they are CLEARLY Mueller towers!!

[Kelly]

liftmech and other interested YAN guys:

I believe that the cross arm height change on the downline side helps with the profile change at the terminal. The pivot point on that terminals style of 8 wheel holddowns' is so far away from the haulrope that even with an adjustable assembly proper guide sheave loads were hard to obtain. To further mess up the situation there was always a profile change between loaded and unloaded conditions which of course you can't adjust for. This also manifests itself by unpredictable chair swing in the bullwheel area. YAN solved this condition by using a floating assembly on quite a few lifts. Riblet had the same design issue but their pivot point (main axel) distance from the haulrope is shorter and along with a compression assembles overcame that problem. It was the classic case of "as drawn" is not "as built". In retrospect it truly is amazing how many inspectors failed to see this condition.

Ryan B

[liftmech]

Ryan B, on Feb 27 2004, 01:39 PM, said:

YAN solved this condition by using a floating assembly on quite a few lifts... Riblet had the same design issue but their pivot point (main axel) distance from the haulrope is shorter...

This make sense as R-lift used to have the Yan floating assembly. It was removed during the Doppelmayr retrofit in 1999. As for Riblet- they tried to put all pivot points directly in line with the rope, didn't they? I seem to recall that being the case.

[floridaskier]

Is that why Yan built so many half-towers too? (or am I completely missing the point?)

[Kelly]

Drawings for the viewers.
Drawings show guide sheave angle and more important load changes at guide sheave with different line loadings.
Notice no load on guide sheave – middle profile. This should be -1 degree.
Hold down assembly is dropped slightly in updated version to reestablish -1 degree angle and a positive sheave load.
Typical weight on guide sheaves is 100 to 400 lbs.
Notice the guide sheave will establish the haul rope position into the bullwheel.
Haul rope position in bull wheel will establish the amount haul rope twist and carrier swing on a fixed grip lift. Neutral to "slightly higher" than neutral are the best positions for the haul rope as it enters the bullwheel.
Notice the interdependency on each adjustment.
With the image flipped and a little imagination – you can see a similar profile for a top terminal.

Half towers - because of little or no weight change with loading conditions at that point in the profile no assembly is needed. In areas that have wind conditions, assemblies were provided for side movement of the haul rope and carrier swing. Also they were offset to provide for a wider ski run. Further discussions and image - see Offset Towers in tech section page 2



Ryan B

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