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Mechanical lifting device operated by turning a leadscrew
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
Jackscrew
2000 aviation accident in the Pacific Ocean
resulting from the in-flight failure of the horizontal stabilizer trim system jackscrew assembly's Acme nut threads." For their efforts to save the plane, both
Alaska_Airlines_Flight_261
1982 aviation accident
deadliest aviation accident in Belarus. The cause was a failure of the jackscrew controlling the horizontal stabilizer due to a design flaw. The Yakovlev
Aeroflot_Flight_8641
Most populous city in Illinois, United States
project raised much of central Chicago to a new grade with the use of jackscrews for raising buildings. While elevating Chicago, and at first improving
Chicago
Mechanical, hydraulic, or pneumatic, lifting device
Jackscrews are integral to the scissor jack, one of the simplest kinds of car jack still used.
Jack_(device)
Boeing's aircraft control system involved in fatal accidents
on the elevator create an opposing force, effectively paralyzing the jackscrew mechanism that moves the stabilizer. It becomes very difficult for pilots
Maneuvering Characteristics Augmentation System
Maneuvering_Characteristics_Augmentation_System
Hardware used to secure parts of a PC to the case
centered around each mounting hole on ATX motherboards. Pairs of #4-40 UNC jackscrews are used to fasten certain connectors to hardware ports. These fasteners
Computer_case_screws
1850s and 1860s engineering project in Chicago
of its low-lying swampy ground. Buildings and sidewalks were raised on jackscrews. The work was funded by both private property owners and public funds
Raising_of_Chicago
Unintended departure from controlled flight
of which are listed below. Aeroflot Flight 8641 Metal fatigue in the jackscrew of the horizontal stabilizer caused the component to fail while the plane
Loss_of_control_(aeronautics)
2012 film by Robert Zemeckis
Airlines Flight 261, which was caused by a broken jackscrew. In that incident, an ungreased jackscrew came loose and caused a catastrophic failure from
Flight_(2012_film)
2019 aviation accident in Ethiopia
same problem Lion Air Flight 610 had faced. Investigators discovered the jackscrew that controlled the pitch angle of the horizontal stabilizer of Flight
Ethiopian_Airlines_Flight_302
17th-century ship of American colonists
colonists had a metal jackscrew that he had purchased in Holland to help in the construction of the settlers' homes. The crew used the jackscrew to secure the
Mayflower
Aircraft component
adjustable stabilizer trim system is powered by an electrically operated jackscrew. Variants on the conventional configuration include the T-tail, Cruciform
Stabilizer_(aeronautics)
Topics referred to by the same term
and data equipment Jack (device), a device used to lift heavy objects Jackscrew, a device used to support heavy objects at various heights Pallet jack
Jack
all 88 on board. The stabilizer failed due to an improperly maintained jackscrew assembly. Note: This crash is covered again in the Season 22 episode 'Pacific
List_of_Mayday_episodes
Airline of the United States
accident to be the failure of acme nut threads, which were part of the jackscrew assembly for the horizontal stabilizer's trim system. On December 26,
Alaska_Airlines
Transport of medication by dog-sled relay across Alaska
crossed the Kaltag Portage west to the coast. Athabascan Jack Nicolai, aka "Jackscrew", took it up the first half of the portage to Old Woman Cabin and Victor
1925_serum_run_to_Nome
Jet airliner model, series based on the DC-9
were killed. Following the crash, an improperly maintained Acme nut and jackscrew recovered from the aircraft were found to be excessively worn. An airworthiness
McDonnell_Douglas_MD-80
Soviet mid-range trijet airliner
Soviet Socialist Republic following a failure of the horizontal stabilizer jackscrew due to fatigue caused by design flaws, killing all 132 on board. All Yak-42s
Yakovlev_Yak-42
Aviation incident in 1977
failure of the jackscrew in the stabilizer, leading to the deaths of 88 people. Aeroflot Flight 8641, a Yakovlev Yak-42 that suffered a jackscrew failure due
Delta_Air_Lines_Flight_1080
2013 aviation accident in Afghanistan
severely damaged the horizontal stabilizer mechanism, including breaking its jackscrew, rendering the airplane uncontrollable and resulting in the abnormal pitch-up
National_Airlines_Flight_102
2019–20 worldwide grounding of the Boeing 737 MAX
have suffered from the same problem as Lion Air Flight 610 in that the jackscrew controlling the pitch of the horizontal stabilizer of the crashed Flight
Boeing_737_MAX_groundings
1991 aviation accident in Texas
that suffered a catastrophic loss of control after improper repairs to jackscrew few years prior. China Airlines Flight 611, a flight that suffered a catastrophic
Continental Express Flight 2574
Continental_Express_Flight_2574
Fastening between tightly fitting parts
presses) may operate by means of the mechanical advantage supplied by a jackscrew or by a gear reduction driving a rack and pinion. The amount of force
Interference_fit
German WWII anti-ship glide bomb
armour-piercing bomb. The elevator was operated with an electrically powered jackscrew as the only proportional control, while the ailerons were operated with
Henschel_Hs_293
Rangefinder and collision detection system
depressing a zig-zag setback device and the wind stream forces unscrewing a jackscrew locking device. This delay in mechanical arming after two independent
M734_fuze
up in mid-air and crashed near Mozyr, Belarus, due to a failure in the jackscrew mechanism caused by metal fatigue, killing all 132 on board in the first
List of accidents and incidents involving commercial aircraft
List_of_accidents_and_incidents_involving_commercial_aircraft
Rhythmic work song sung on sailing vessels
Gulf Coast, and the Caribbean—including "cotton-screwing" (using a large jackscrew to compress and force cotton bales into the holds of outbound ships at
Sea_shanty
Fully movable aircraft stabilizer
adjustable stabilizer trim system is powered by an electrically operated jackscrew. One example of an airliner with a true stabilator used for flight control
Stabilator
Screw thread profile with a square cross-section
thread profile, used in high load applications such as leadscrews and jackscrews. It gets its name from the square cross-section of the thread. It is the
Square_thread_form
NASA experimental variable-sweep wing aircraft
20°, 40° and 60°, creating an inflight "variable-geometry" platform. A jackscrew assembly moved the wing's hinge along a set of short horizontal rails
Bell_X-5
1977 cargo plane crash in Lusaka, Zambia
failure of the stabilizer was violent enough to fracture the vertical trim jackscrew, which would have resulted in the remaining horizontal stabilizer pitching
1977_Dan-Air_Boeing_707_crash
1988 aviation accident in Texas
climb at takeoff speed, its roll instability, the position of the flap's jackscrews in the fully retracted position, and the absence of sounds indicating
Delta_Air_Lines_Flight_1141
Orthodontics device to widen the upper jaw
times which amounts of 1mm per week. Patient is instructed to turn the jackscrew at the same rate for next 8–10 weeks to achieve the desired expansion
Palatal_expansion
Official word describing a resident of the U.S. state of Indiana
to and from the holds of ships and force them in tightly by means of jackscrews. A Hoosier cabinet, often shortened to "hoosier", is a type of free-standing
Hoosier
Screw used as a linkage in a mechanism
27.2 for both ends fixed Ball screw Roller screw Fine adjustment screw Jackscrew Ball Screws & Lead screws, retrieved 2008-12-16. Bhandari, p. 202. Shigley
Leadscrew
D-subminiature connectors), short standoffs may be used to receive the jackscrews that lock the connection together. tension control bolt A tension control
List_of_screw_and_bolt_types
MD-83 The aircraft lost pitch control when an inadequately lubricated jackscrew tore loose, causing it to crash into the ocean while preparing for an
List of fatal accidents and incidents involving commercial aircraft in the United States
List_of_fatal_accidents_and_incidents_involving_commercial_aircraft_in_the_United_States
Decade of the Gregorian calendar (2000–2009)
into the Pacific Ocean off the coast of California after the plane's jackscrew failed, killing all 88 on board. On July 25, 2000, Air France Flight 4590
2000s
Type of electrical connector
usually have #4-40 UNC (as designated with the Unified Thread Standard) jackscrews that accept screws on the cable end connector cover that are used for
D-subminiature
Low-friction linear actuator
one directionPages displaying short descriptions of redirect targets Jackscrew – Mechanical lifting device operated by turning a leadscrew Leadscrew –
Ball_screw
Types of mechanical separators
D-subminiature connectors), short standoffs may be used to receive the jackscrews that lock the connection together. In contrast, some spacers may look
Spacers_and_standoffs
Flight attitude or airspeed limits exceeded risking loss of control
G-load on the plane, resulting in binding of the horizontal stabilizer jackscrew such that it remained in a full trimmed down position. The plane came
Aircraft_upset
1997 aircraft crash in Indonesia
one of the pilots. Furthermore, the investigators had found the trim jackscrew for the horizontal stabilizer, which revealed that flight inputs from
SilkAir_Flight_185
German single- or two-seat glider, 1990
the powerplant. The jackscrew is attached between the airframe and the upper forward end of the pylon such that when the jackscrew is retracted (shortened)
Schempp-Hirth_Nimbus-4
Platform that allows telescopes to track objects in the equatorial axis
Two of the points were aligned on a polar axis while the third was a jackscrew actuator to drive the platform. This gave the mount a few minutes of equatorial
Equatorial_platform
that is in contact with palatal mucosa. Inside the acrylic there is a jackscrew that is embedded for patients to make turns to expand the device. In addition
List_of_palatal_expanders
Actuator that creates motion in a straight line
displacement via screws and/or gears to which the knob or handle is attached. A jackscrew or car jack is a familiar mechanical actuator. Another family of actuators
Linear_actuator
Device used to join electrical conductors
sealing. Locking mechanism designs include locking levers of various sorts, jackscrews, screw-in shells, push-pull connector, and toggle or bayonet systems.
Electrical_connector
1996 aviation accident in Virginia
controls were destroyed in the crash, but the NTSB recovered two trim jackscrews from the horizontal stabilizer. The NTSB recreated the stall in a simulator
Airborne_Express_Flight_827
It is a telescopic tubular steel prop, used as a temporary support. A jackscrew is similar but not as long and not telescopic. Outside the UK an Acrow
Glossary of structural engineering
Glossary_of_structural_engineering
2024 video game
expedition mission. Expeditions introduces a number of new tools, including jackscrews which flip over players' cars, metal detectors and camera drones which
Expeditions:_A_MudRunner_Game
Compression ratio adjustment technology
head and sleeve, whose distance from the crankshaft was adjusted by a jackscrew operated by cables from a twist grip on the handlebar. Compression adjustment
Variable_compression_ratio
Seaplane, also known as the "Seagull ASR-1", built by the British company Supermarine
incidence, pivoting at the front spar and actuated by an electrically driven jackscrew attached to the rear spar. This arrangement reduced stalling speed and
Supermarine_Seagull_(1948)
later. 28 June 1982 – Aeroflot Flight 8641, a Yakovlev Yak-42, suffered a jackscrew failure, causing the aircraft to lose control, disintegrate in mid-air
List of accidents and incidents involving airliners by location
List_of_accidents_and_incidents_involving_airliners_by_location
Church in Vienna, Austria
on. When it was time to ring the bell, the cradle would be lowered via jackscrews, and eight men would pull the hefty clapper back and forth on ropes. This
St. Stephen's Cathedral, Vienna
St._Stephen's_Cathedral,_Vienna
Protective structure used during the excavation of tunnels
de-watering the tunnel. This shield was made of cast-iron and was moved by jackscrews. Shelves supported the different sides until more permanent brick linings
Tunnelling_shield
Mechanism that converts motion, and forces, from rotational to linear
the Unified Thread Standard. In machine linkages such as lead screws or jackscrews, in contrast, friction must be minimized. Therefore, threads with smaller
Screw_mechanism
Bell in St. Stephen's Cathedral in Vienna
it was to be rung, the rails had to be lowered away from it by turning jackscrews, and then eight men pulled on the two ropes attached to its heavy clapper
Pummerin
Military railway in Upnor, Kent, England (1885–1961)
derailed on the curve around Issingham Barracks. The line only had a 5-ton jackscrew and a large crew spent most of the next day re-railing the locomotive
Chattenden_and_Upnor_Railway
Soviet 1930s monoplane fighter aircraft
operated the rearmost strut's upper end, moved with a manually turned jackscrew running spanwise within the wing structure, to "slide" outwards and inwards
Polikarpov_I-16
Mountain gun
gun shield, no traversing mechanism, and elevation was controlled by a jackscrew beneath the breech. Since it had limited elevation -10° to +20° it was
7.5 cm Gebirgskanone L/13 C/80
7.5_cm_Gebirgskanone_L/13_C/80
2005 aviation accident in Indonesia
field investigation, the NTSC managed to recover six out of eight flap jackscrews, and all of them were in the retracted position. The team also discovered
Mandala_Airlines_Flight_091
Island of the Channel Islands in California, United States
near the island following a catastrophic loss of pitch control caused by jackscrew, killing all 88 people aboard. Along with the Channel Islands Beach area
Anacapa_Island
1940 bomber aircraft family by Dornier
with rear-end-hinged dorsal and ventral panels opened and closed by a jackscrew. It was powered by BMW 801L engines and armed with forward firing 15 mm
Dornier_Do_217
French WW1 bomber trainer aircraft
wing was attached to the fuselage by a single pivot, and controlled by a jackscrew in the cockpit. This allowed for an unusually broad speed range, so that
Paul_Schmitt_P.S.3
beyond safe limit 88 Lack of lubrication causing structural failure of the jackscrew on the horizontal stabiliser resulting in aircraft descending inverted
List of aircraft structural failures
List_of_aircraft_structural_failures
Building in Chicago, Illinois
leases. Instead, Hale lifted the second, third, and fourth floors on jackscrews and demolished the first. A new basement and ground floor, designed by
Reliance_Building
French-Canadian burglar, safe cracker and bank robber
fourth story window in the north end of the building, with the help of a jackscrew smuggled in from the outside, and climbed outside using a rope. He remained
Samuel_Perris
Mozyr while en route, following the failure of the horizontal stabiliser jackscrew due to metal fatigue. The aircraft was operating a Leningrad–Kiev passenger
Aeroflot accidents and incidents in the 1980s
Aeroflot_accidents_and_incidents_in_the_1980s
Memorial to astronauts who died in the line of duty
international design competition. The memorial as built incorporated motors and jackscrews to constantly track the Sun across the sky in both pan and tilt axes.
Space_Mirror_Memorial
Ocean about 2.7 miles (4.3 km) north of Anacapa Island, California. A jackscrew of the horizontal stabilizer failed, causing a loss of control. All 88
List of accidents and incidents involving airliners in the United States
List_of_accidents_and_incidents_involving_airliners_in_the_United_States
American dentist and politician
creating a version of a butter churn, a door spring, a lock for a door, and jackscrews for teeth. Westcott was a well-regarded citizen in Syracuse; historian
Amos_Westcott
Landing gun
mechanism, no traversing mechanism, and elevation was controlled by a jackscrew beneath the breech. The lower part of the gun shield was hinged and could
6_cm_S-Bts_K_L/21
Metalworking tool for curving sheet metal
move with a hydraulic jack on machines designed for steel plate, or a jackscrew on machines designed for sheet metals. As the material thins, the operator
English_wheel
United States historic place
the track along which its flanged wheels moved. They also set up the jackscrews necessary to stabilize the shovel in front of the rock face it was digging
Marion Steam Shovel (Le Roy, New York)
Marion_Steam_Shovel_(Le_Roy,_New_York)
1950s American experimental aircraft
metal construction. It incorporated a variable-incidence wing, with a jackscrew mechanism allowing the wing to be adjusted in flight, with the angle of
PAR_Special
Process of moving a structure from one location to another
low-technology method is to use building jacks called screw jacks or jackscrews which are manually turned. With both types of jacking systems, wood beams
Structure_relocation
Heavy mortar
steel-rimmed wheels for towing. There was a crescent-shaped rail with a jackscrew at the front of the platform that controlled traverse and elevation. The
24 cm schwere Flügelminenwerfer IKO
24_cm_schwere_Flügelminenwerfer_IKO
Movable mount for satellite dishes
them to use a single positioner to move the antenna in the form of a "jackscrew" or horizon-to-horizon gear drive. Polar mounts work in a similar way
Polar_mount
Mountain gun
gun shield, no traversing mechanism, and elevation was controlled by a jackscrew beneath the breech. It could be broken down into four mule loads for transport
Cannone_da_70/15
English-American inventor and mechanical engineer
back wheels of the fire engine were lifted off the ground by a built-in jackscrew when pumping water for use on a fire, whereupon they served as flywheels
Paul_Rapsey_Hodge
Railway gun
4-wheeled bogie at both ends that could also be raised and lowered. Lastly, jackscrews are provided on the car body for transferring from one set of trucks to
Canon_de_240_TR_Mle_1903
American architect
commissioned which it noted featured "...a cornice [that] is pure sculpture - no jackscrews of mingled mouldings [to] confuse its clean profile." The illustrated
Robert_Seyfarth
are all-metal. The brakeless retractable main gear used a simple manual jackscrew. A tailskid was used rather than a tailwheel. 1936 National Air Races
Rider_R-5
Railway gun
traverse. Once on site the carriage's outriggers would be unfolded and jackscrews at the ends of the outriggers lowered to level the carriage and take the
Obusier de 200 "Pérou" sur affût-truck TAZ Schneider
Obusier_de_200_"Pérou"_sur_affût-truck_TAZ_Schneider
American four-masted wooden schooner
skids to direct the schooner into the water. They employed hydraulic jackscrews to dislodge her from the sand onto the skids while the Wallowa pulled
Minnie_A._Caine
Railway gun
4-wheeled bogie at both ends that could also be raised and lowered. Lastly, jackscrews are provided on the car body for transferring from one set of bogies to
Mortier de 293 Danois sur affut-truck modèle 1914
Mortier_de_293_Danois_sur_affut-truck_modèle_1914
was an accident. When lowering the ship to allow visitor boarding, the jackscrew holding the stern gave way, and the keel fell on Primorac's leg, causing
City_of_Ragusa
American painter (1918–1999)
worked in still life and landscape genres. He collected saws, planes, jackscrews, and brace-and-bits, which he turned into "strong and colorful" oil paintings
Byron_Randall
pushed under the water. Favorite had sunk on a Friday, but with the use of jackscrews, and the aid of the tug Triumph and a scow, by Sunday evening, Favorite
Favorite_(steamboat)
Railway gun
panels that created a circular base when unfolded and a combination of jackscrews, outriggers, and rail clamps stabilized the carriage during firing. The
Peigné-Canet-Schneider mle 1897 gun carriage
Peigné-Canet-Schneider_mle_1897_gun_carriage
Demolished gasometer in Gothenburg, Sweden
began in early 2017 and was performed by lifting the building using 20 jackscrews and removing the bottom most section. Using this process the building
Gasklockan,_Gothenburg
Railway gun
rails and the carriage was lifted by four jackscrews through the floor of the car. The combination of jackscrews, outriggers, and rail clamps stabilizing
Materiel de 155 sur affut-truck Schneider
Materiel_de_155_sur_affut-truck_Schneider
Sternwheel-driven steamboat
heavy chain would be placed around the hull and secured to the timbers. Jackscrews would be placed under the timbers and gradually turned. As the timbers
Mascot_(sternwheeler)
JACKSCREW
JACKSCREW
JACKSCREW
JACKSCREW
Boy/Male
Gaelic
Frank.
Boy/Male
Tamil
Raktakamal | ரகà¯à®¤à®¾à®•à®®à®²
A red lotus
Boy/Male
Scottish American English
From the land between the streams.
Boy/Male
Hindu
To cherish, To hold dear
Boy/Male
Tamil
Gourishankar | கௌரீஷஂகர
Peak of the himalayas, Mt everest
Boy/Male
Indian
Infinite.
Girl/Female
Muslim
Pure, Chaste, Polite, Nice
Girl/Female
Bengali, Indian, Sanskrit
Brilliance
Female
Greek
(ΜαÏία) Greek form of Hebrew Miryam, MARIA means "obstinacy, rebelliousness" or "their rebellion." In the bible, this is the name of many characters, including the mother of Jesus and a sister of Lazaros (Latin Lazarus). Compare with another form of Maria.
Girl/Female
Hindu, Indian, Tamil, Telugu
First Ray of Sunrise; Chaht; The Sun; Inner Light; Air
JACKSCREW
JACKSCREW
JACKSCREW
JACKSCREW
JACKSCREW
n.
A jack in which a screw is used for lifting, or exerting pressure. See Illust. of 2d Jack, n., 5.
n.
A small jackscrew.
n.
A portable machine variously constructed, for exerting great pressure, or lifting or moving a heavy body through a small distance. It consists of a lever, screw, rack and pinion, hydraulic press, or any simple combination of mechanical powers, working in a compact pedestal or support and operated by a lever, crank, capstan bar, etc. The name is often given to a jackscrew, which is a kind of jack.