Yan High-Speed Lifts: A History of Engineering Controversies and Accidents
In the pursuit of affordable and efficient mountain transport, Lift Engineering, led by Polish immigrant Yanek Kunczynski, introduced a series of high-speed detachable quads to the North American market. While the company successfully sold 31 of these lifts across the United States and Canada, the legacy of these machines is defined more by mechanical failure and safety controversies than by their innovation.
Kunczynski, who brought experience from the French manufacturer Poma, was known for a philosophy of simplification. In an effort to reduce costs, he frequently removed components he deemed unnecessary and substituted materials—most notably replacing aluminum towers with steel and swapping traditional steel coil springs for rubber rings.
[ไม่มีภาพประกอบ]Key Facts
- Total Units: 31 high-speed quads sold in the U.S. and Canada.
- Design Flaw: Use of rubber "marshmallow" springs instead of high-tension steel coils in grips.
- Major Incidents: Fatal accidents at Keystone (1985), Sierra Ski Ranch (1993), and Whistler (1995).
- Industry Response: Many remaining lifts were later retrofitted by Poma or Doppelmayr.
- Controversy: Allegations of poor welding practices, including assembling parts in resort parking lots.
Mechanical Failures and the "Yankee Slipper"
Yan lifts became notorious for grip slippage, a condition where the mechanism holding the chair to the cable fails to maintain a secure hold. This issue was so prevalent that some lifts required hours of operation every morning just to realign chairs that had slipped overnight. This reliability gap earned the "Yankee Clipper" lift at Mount Snow, Vermont (now the Grand Summit Express), the mocking nickname "Yankee Slipper."
Major Accidents and Safety Failures
Keystone, Colorado (1985)
On December 14, 1985, a catastrophic failure occurred on the Teller lift at Keystone Ski Resort. The upper bullwheel—the large pulley wheel that drives the cable—disconnected from the main gearbox shaft. The design was unconventional, lacking a support beam underneath the bullwheel; Lift Engineering had claimed that the system's pressure and welds alone would suffice. Faulty welding was cited as the cause, resulting in two deaths and 47 injuries.
Following this, the Colorado Passenger Tramway Safety Board raised alarms after discovering that Kunczynski often had steel parts welded together in ski area parking lots to keep costs low. Despite these warnings, the ski industry continued to install Yan lifts for several years.
Sierra Ski Ranch, California (1993)
On April 4, 1993, a derailment on the Slingshot lift caused two chairs to stack, killing a 9-year-old boy and injuring another child. This followed a previous incident two months prior where a grip failure caused an empty chair to fall. Lift Engineering eventually settled a wrongful-death lawsuit for $1.9 million. By 1996, the resort spent $6 million to replace three Yan detachables, noting that the equipment did not withstand the test of time.
Whistler, British Columbia (1995)
One of the most significant failures occurred on December 23, 1995, on the Quicksilver lift at Whistler Mountain. When the emergency stop was used repeatedly, the lack of high-tension coil springs in the grips—which relied instead on low-force rubber "marshmallow" springs—allowed chairs to shake free from the cable. Four chairs fell, resulting in two deaths and eight injuries. The Quicksilver lift was replaced by the Poma-built Creekside Gondola in 1997.
[ไม่มีภาพประกอบ]Summary of Major Yan Lift Incidents
| Location | Year | Primary Cause | Outcome |
|---|---|---|---|
| Keystone, CO | 1985 | Faulty welding / Bullwheel disconnection | 2 dead, 47 injured |
| Sierra Ski Ranch, CA | 1993 | Loose bolts / Derailment | 1 dead, 1 injured |
| Whistler, BC | 1995 | Grip failure (Rubber springs) | 2 dead, 8 injured |
Frequently Asked Questions
Why were Yan lifts prone to slippage?
Yan lifts used rubber "marshmallow" springs in their grips rather than high-tension steel coil springs. This exerted significantly less force on the cable, making the chairs susceptible to sliding, especially during emergency braking or overnight periods.
Who was Yanek Kunczynski?
Yanek Kunczynski was a Polish immigrant and the head of Lift Engineering. He was known for reducing costs by substituting materials, such as using steel instead of aluminum for towers, and simplifying designs by removing parts he considered unnecessary.
What happened to the lifts after these accidents?
Many of the remaining Yan lifts were retrofitted by established companies like Poma and Doppelmayr to improve safety. Others were completely replaced, such as the Quicksilver lift at Whistler and the detachables at Sierra Ski Ranch.
Did government inspectors catch these flaws?
According to reports, the majority of government safety inspectors failed to detect the fundamental design flaws in the Yan grips before the major accidents occurred.