VHS Rip | Eskimo Lift Destruction Rollback Test скачать в хорошем качестве

VHS Rip | Eskimo Lift Destruction Rollback Test

Eskimo Lift Destruction Test (Full Video    • VHS Rip | Eskimo Lift Destruction Rollback...  ) Info From http://www.skilifts.org/ Performed on June 18-19 in 1990 at the Winter Park Ski Resort in Colorado, W.P.R.A & Jenlynn Inc. performed several tests on a 1963 Riblet center pole fixed-grip double chair to see what would happen if any of the tests performed would happen in a real-life scenario. Lift Statistics: Manufacturer: Riblet Installed: 1963 Type: Center pole fixed-grip double chair Slope Length: 4,320 feet Vertical Rise: 1,212 feet Speed: 500 FPM Capacity: 1000 PPH Chair Spacing: 160 FT Number of Chairs: 155 Line Guage: 1,0' 1" Drive Equipment: Power: 150 HP/ Vault Drive Brakes: Cable Backstop: TRB E-Brake: Yan 1500 Cal. Service Brake: Spring APPL. and Hydraulic Release. Tests Performed: Brakes Rollback Oily Rope Tree on Line Fire Tower Pull Day One: The first set of tests that were performed were those concerning the lift's braking system. The service, emergency, and traction rope brakes had already been torqued tested to the standard prescribed values before the test was started. The chairlift was loaded with concrete discs that weigh 57 pounds each and were placed equally on 72 of the 155 chairs to bring the total weight to 29,000 pounds. The weight represented 110 percent of the lift's full uphill design load. When the first brake test started, both the service and emergency brakes were applied individually with the lift traveling in a reverse direction with a line speed that reached a maximum speed of 550 feet per minute (FPM), 50 feet faster than its designed speed. When the lift was operating in reverse at a speed of 400 FPM, it failed to stop when the service brake was applied which became inoperable due to the heat that was being generated in the brake shoes. However, in order to stop the lift, the bullwheel brake had to be applied. The bullwheel brake was a Yan 1500 acting directly on the flange of the bullwheel. The test was performed again with the lift reaching a maximum reverse speed of 550 FPM and only the bullwheel brake being applied to stop the lift. The lift stopped adequately with a maximum deceleration of 1.52 ft./s2, although at the haul rope derailed at the top station when a chair got lodged into the guidage. For the last test that was performed in this series, the main drive shaft that was connecting the gear reducer to the bullwheel was disconnected at the coupling adjacent to the gear reducer. The lift was allowed to travel in reverse with a couple of loaded chairs passing around the bullwheel. It was then instructed that the chairlift be stopped using the bullwheel brake, but since this lift has two stop buttons, the normal stop button was depressed inadvertently instead of the one for the bullwheel brake. Because of this, the lift gained a tremendous amount of speed in the reverse direction, reaching speeds up to 1500 FPM. The 57-pound concrete disk that were placed on the chairs were thrown 120 feet into the air from the center of the bullwheel. Chairs were dislodged from the haul rope and flung in different directions causing them to become tubular steel pretzels after going around the bull wheels. During this rollback, the chairlift traveled 1440 feet or 24 chair lengths resulting in the total destruction of the carriers that went around the top and bottom bull wheels. The guidage rails for the top and bottom stations were damaged beyond repair and one carrier managed to get lodged into the lower station's guidage rails. The track rope brake was quickly applied, but because of the speed the lift was traveling and the chairs that were attached to the haul rope, the chairs moved the haul rope out of the track brake. The chairlift eventually slowed down and came to a stop because of the forces of destruction. See Pinned Comment For Rest Of The History Thx.