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The polyspastos, when worked by four men at both sides of the winch, could readily lift 3,000 kg (6,600 lb) (3 ropes x 5 pulleys x 4 men x 50 kg or 110 lb = 3,000 kg or 6,600 lb). If the winch was replaced by a treadwheel, the maximum load could be doubled to 6,000 kg (13,000 lb) at only half the crew, since the treadwheel possesses a much ...
Harbor Freight Tools, commonly referred to as Harbor Freight, is an American privately held tool and equipment retailer, headquartered in Calabasas, California. It operates a chain of retail stores, as well as an e-commerce business. The company employs over 28,000 people in the United States, [5] and has over 1,500 locations in 48 states. [6] [7]
California portal; This article is within the scope of WikiProject California, a collaborative effort to improve the coverage of the U.S. state of California on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Video shows 'heartbreaking' damage from California wildfires. Here's an aerial view of some of the devastation in Malibu and Pacific Palisades, California.
A 23-year-old hiker who survived 13 days lost in the Australian wilderness after stumbling on two granola bars has thanked his rescuers for enduring “tough conditions” to find him.
Comcast shares closed down nearly 10% Monday after Dave Watson, president and CEO of Comcast Cable, said the company expects broadband subscribers to decline by over 100,000 in the current quarter.
A simple dumbwaiter is a movable frame in a shaft, dropped by a rope on a pulley, guided by rails; most dumbwaiters have a shaft, cart, and capacity smaller than those of passenger elevators, usually 45 to 450 kg (100 to 992 lbs.) [2] Before electric motors were added in the 1920s, dumbwaiters were controlled manually by ropes on pulleys.
K-1200 operated by Timberline Helicopters. In 1947, the German aeronautical engineer Anton Flettner was brought to the United States as part of Operation Paperclip. [2] He was the developer of the two earlier synchropter designs from Germany during the Second World War: the Flettner Fl 265 which pioneered the synchropter layout, and the slightly later Flettner Fl 282 Kolibri ("Hummingbird ...