Unmodified Unremoved YAN Express Lifts
#2
Posted 23 February 2016 - 09:25 PM
Can't imagine there's many (if any at all) un-modded Yan detachables around anywhere. Those grips not only have proven safety defects but they also lack any manufacturer support in this day and age.
#3
Posted 24 February 2016 - 10:28 AM
This post has been edited by julestheshiba: 24 February 2016 - 10:45 AM
-Will
#4
Posted 24 February 2016 - 10:33 AM
(put these coordinates into google maps 32.636585, 51.625842)
check this too http://www.schupfer....ws/esfahan-iran
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This post has been edited by julestheshiba: 24 February 2016 - 01:15 PM
-Will
#5
Posted 24 February 2016 - 11:35 AM
1. the spring mechanisms were sensitive to sudden changes in temperature, especially freeze-thaw cycles.
2. they relied partly on the force of gravity to apply pressure meaning that in the event of a sudden stop on a long, steep span grip force could be reduced.
The lift in Iran appears to not be very steep and operates in a warmer climate, It should be able to operate for years to come without issue as long as parts are available.
People often blow the Yan grip issues out of proportion due to the incident in Whistler in the 90's, people often forget that this incident was the result of a rare worst case scenario: 100% downhill load on a very steep lift that crossed the freezing level on the day, the grip slip happened after several e-stops in rapid succession.
#6
Posted 24 February 2016 - 12:43 PM
All except Grand Summit Express were modified the same exact way. They had the grips, sheaves, and other line gear replaced. They also had a Poma Challenger glass top added to both terminals. Superstar and Barker got new Poma Omega chairs in 2004. The rest kept the Yan chairs.
Grand Summit Express was modified differently. It got new grips, sheaves, and line gear, and a glass top at the summit, but the base terminal didn't get the glass top. In 2011, the Yan chairs were replaced with Poma Omega chairs with footrests and a glass top added at the bottom.
I also heard rumors that Grand Summit Express was modified earlier than the others which was actually before the Quicksilver accident. Is that the reason for the base terminal not getting the glass top or is it something else. I will note that Grand Summit Express is the only Yan HSQ in the east that is top drive. Maybe they didn't think they needed the glass top at the return, but the other bottom drive lifts got it because the return would be exposed to more harsh weather conditions, but they wanted all the drive terminals to be covered.
#7
Posted 24 February 2016 - 01:13 PM
Mike12164, on 24 February 2016 - 11:35 AM, said:
1. the spring mechanisms were sensitive to sudden changes in temperature, especially freeze-thaw cycles.
2. they relied partly on the force of gravity to apply pressure meaning that in the event of a sudden stop on a long, steep span grip force could be reduced.
The lift in Iran appears to not be very steep and operates in a warmer climate, It should be able to operate for years to come without issue as long as parts are available.
People often blow the Yan grip issues out of proportion due to the incident in Whistler in the 90's, people often forget that this incident was the result of a rare worst case scenario: 100% downhill load on a very steep lift that crossed the freezing level on the day, the grip slip happened after several e-stops in rapid succession.
You cant blame them they made the lifts cheaper
But since this one is on barely an incline it makes since it would be safer
This post has been edited by julestheshiba: 24 February 2016 - 01:16 PM
-Will
#12
Posted 27 February 2016 - 04:27 AM
julestheshiba, on 24 February 2016 - 10:33 AM, said:
(put these coordinates into google maps 32.636585, 51.625842)
check this too http://www.schupfer....ws/esfahan-iran
I believe this instagram account shows the same lift, many interesting photos.
https://www.instagram.com/engineering_rope_way/
#14
Posted 27 February 2016 - 11:16 AM
http://liftblog.com/...igh-speed-quad/
Quote
#15
Posted 28 February 2016 - 05:55 PM
Mike12164, on 23 February 2016 - 09:25 PM, said:
Can't imagine there's many (if any at all) un-modded Yan detachables around anywhere. Those grips not only have proven safety defects but they also lack any manufacturer support in this day and age.
Nope. Still there.
https://www.instagra.../p/BAXiEVgOkEK/
https://www.instagra.../p/BCTExu3h7-n/
#16
Posted 28 February 2016 - 06:05 PM
#17
Posted 28 February 2016 - 08:12 PM
i.boshard, on 28 February 2016 - 05:55 PM, said:
Interesting, we got in to talking about Yan lifts, he found them quite interesting since they're not common in Europe and mentioned that an unmodded Yan detachable quad had been removed and replaced with a 6 pack, can't imagine there's too many Yan detachables in Europe...
snoloco, on 28 February 2016 - 06:05 PM, said:
Never quite understood that, basically there were 2 lifts, the Friendly Giant and the Glacier running side by side, the Friendly Giant basically made Glacier redundant until Glacier was replaced with a Leitner detachable which then in turn rendered the Friendly Giant redundant. Why install a second similar lift to replace a a fully functional one? are Yan parts really so hard to come by that it's justified? Even with Yan being long gone I wouldn't have thought the cost of maintaining a Yan lift would be that expensive compared to buying a new lift.
This post has been edited by Mike12164: 28 February 2016 - 08:14 PM
#20
Posted 29 February 2016 - 08:43 PM
teachme, on 29 February 2016 - 01:09 PM, said:
Generally regulations regarding the operation of heavy equipment such as cranes and excavators in national parks are quite strict which explains why many of Lake Louise's now derelict lifts remain standing, there are 3 that I know of Eagle has several towers and the drive terminal, Olympic pretty much looks like it could still run other than the top controls having been vandalized and an incredibly rusty haul rope and the old Von Roll gondola still has a few towers standing.
I suspect something a little more complicated with Friendly Giant, Lake Louise seems to be pushing to remove all of their Yan lifts for whatever reason, Ptarmigan, which was a Yan fixed grip quad was replaced with a Poma fixed grip quad a few years ago and I believe I read somewhere that Paradise was either replaced or modified for this year, haven't been to Louise this season yet so I can't confirm this.
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