Jackscrew
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A jackscrew, or screw jack, is a type of jack that is operated by turning a leadscrew. It is commonly used to lift moderate and heavy weights, such as vehicles; to raise and lower the horizontal stabi
A 2.5-ton screw jack. The jack is operated by inserting the bar (visible lower left) in the holes at the top and turning.
In the 19th century, the Raising of Chicago involved entire city blocks being lifted with jackscrews.
An electronics module mounted on the back of a large electrical connector incorporating two very long T-handle jackscrews
National Airlines Flight 102
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National Airlines Flight 102 was a cargo flight operated by National Airlines between Camp Bastion near the city of Lashkargah in Afghanistan and Al Maktoum International Airport in Dubai, with a refu
Jackscrew
…McDonnell Douglas MD-80 due to deficient maintenance brought down Alaska Airlines Flight 261 in 2000. A MRAP armoured vehicle being transported aboard National Airlines Flight 102 in 2013, a Boeing 747-400BCF freighter, broke loose immediately after takeoff and smashed through the rear bulkhead. Both flight recorders were knocked…
Aerial view of the crash site
N949CA, the aircraft involved in the accident, photographed in 2012
The horizontal stabilizer of the aircraft at the crash site
Another view of the wreckage