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thrust

  (thrŭst) pronunciation

v., thrust, thrust·ing, thrusts.

v.tr.
  1. To push or drive quickly and forcibly. See synonyms at push.
  2. To issue or extend: poplars thrusting their branches upward; thrust out his finger.
  3. To force into a specified condition or situation: She thrust herself through the crowd. He was thrust into a position of awesome responsibility.
  4. To include or interpolate improperly.
  5. To force on an unwilling or improper recipient: “Some have greatness thrust upon them” (Shakespeare).
  6. Archaic. To stab; pierce.
v.intr.
  1. To shove something into or at something else; push.
  2. To pierce or stab with or as if with a pointed weapon.
  3. To force one's way.
n.
  1. A forceful shove or push.
    1. A driving force or pressure.
    2. The forward-directed force developed in a jet or rocket engine as a reaction to the high-velocity rearward ejection of exhaust gases.
  2. A piercing movement made with or as if with a pointed weapon; a stab.
  3. The essence; the point: The whole thrust of the project was to make money.
  4. Architecture. Outward or lateral stress in a structure, as that exerted by an arch or vault.
  5. An attack or assault, especially by an armed force.

[Middle English thrusten, from Old Norse thr[ymacr]sta.]

thruster thrust'er n.
thrustful thrust'ful adj.
 
 

The force that propels an aerospace vehicle or marine craft. Thrust is a vector quantity. Its magnitude is usually given in newtons (N) in International System (SI) units or pounds-force (lbf) in U.S. Customary Units. A newton is defined as 1 kilogram mass times an acceleration of 1 meter per second squared. One newton equals approximately 0.2248 lbf. See also Force; Units of measurement.

The thrust power of a vehicle is the thrust times the velocity of the vehicle. It is expressed in joules (J) per second or watts (W) in SI units. In U.S. Customary Units thrust power is expressed in foot-pounds per second, which can be converted to horsepower by dividing by 550. See also Jet propulsion; Power; Ramjet; Reciprocating aircraft engine; Rocket; Turbojet.


 
Thesaurus: thrust

verb

  1. To force to move or advance with or as if with blows or pressure: drive, propel, push, ram, shove. See move/halt.
  2. To cause to penetrate with force: dig, drive, plunge, ram, run, sink, stab, stick. See put in/take out.
  3. To cause to stick out: poke, push, shove. See convex/concave.

noun

  1. An act or instance of using force so as to propel ahead: butt1, push, shove. See push/pull.
  2. The thread or current of thought uniting or occurring in all the elements of a text or discourse: aim, burden2, drift, intent, meaning, purport, substance, tendency, tenor. See meaning.

 
Antonyms: thrust

n

Definition: forward movement
Antonyms: pull

v

Definition: push hard
Antonyms: pull


 

A movement causing the formation of a reverse fault of a very low angle. The thrust plane is the low-angle fault face over which movement occurs.

 
Architecture: thrust


1. The amount of push or force exerted by or on a structure.
2. In an arch, the resultant force normal to any cross section of the arch.


 

1. A force that produces motion.

2. A continuous force applied by one object on another.

 
Word Tutor: thrust
pronunciation

IN BRIEF: To push with sudden force.

pronunciation Be not afraid of greatness: . . . Some are born great, Some achieve greatness, And some have greatness thrust upon them. — William Shakespeare (1564-1616)

 
Wikipedia: thrust


Thrust is a reaction force described quantitatively by Newton's Second and Third Laws. When a system expels or accelerates mass in one direction the accelerated mass will cause a proportional but opposite force on that system.

Examples

Forces on an aircraft
Enlarge
Forces on an aircraft

A fixed-wing aircraft generates forward thrust when a spinning propeller moves air, or gases are ejected from a jet engine (or rocket engine), opposite the direction of flight. The forward thrust is proportional to the (mass of the air) multiplied by (average velocity of the airstream). Reverse thrust can be generated to aid braking after landing by reversing the pitch of variable pitch propeller blades, or using a thrust reverser on a jet engine. Rotary wing aircraft and thrust vectoring V/STOL aircraft use engine thrust to support the weight of the aircraft, and vector some of this thrust fore and aft to control forward speed.

A motorboat generates thrust (or reverse thrust) when the propellers are turned to accelerate water backwards (or forwards). The resulting thrust pushes the boat in the equal and opposite direction to the sum of the momentum change in the water flowing through the propeller.

A rocket's mass is propelled forward by a thrust force equal to, and opposite of, the time-rate of momentum change of the exhaust mass accelerated from the combustion chamber through the rocket engine nozzle. This is the exhaust velocity with respect to the rocket, times the time-rate at which the mass is expelled, or in mathematical terms:

T=v\frac{dm}{dt}

where:

T = thrust generated (force),
\frac {dm} {dt} = rate of change of mass with respect to time (fuel burn rate).
v = exhaust velocity.

Of course, for a launch the thrust at lift-off should be more than the weight, and with a fair margin, because a "slow launch" would be very inefficient.

Each of the three Space shuttle main engines can produce a thrust of 1.8 MN, and each of its two Solid Rocket Boosters 14.7 MN, together 34.8 MN. Compare with the mass at lift-off of 2,040,000 kg, hence a weight of 20 MN.

By contrast, the simplified Aid for EVA Rescue (SAFER) has 24 thrusters of 3.56 N each.

In the air breathing category, the AMT-USA AT-180 jet engine developed for radio-controlled aircraft produce 90 N (20 Lbf) of thrust.[1] The GE90-115B engines fitted on the Boeing 777-300ER, recognized by the Guinness Book of World Records as the "World's Most Powerful Commercial Jet Engine," have a tested thrust of 569 kN (127,900 lbf).

References

  1. ^ AMT-USA jet engine product information. Retrieved on 2006-12-13.

See also


 
Translations: Translations for: Thrust

Dansk (Danish)
v. tr. - støde, bore, stikke, mase, puffe, skubbe
v. intr. - bane sig vej
n. - stød, udfald, puf, stik, tryk, fremstød

idioms:

  • thrust upon    tvinge åben

Nederlands (Dutch)
duwen, toesteken, een weg banen, uitsteken, stoot, steek, (stuw-, drijf)kracht

Français (French)
v. tr. - mettre brusquement, enfoncer qch dans, passer brusquement, pousser violemment
v. intr. - percer, enfoncer (dans), pousser (dans), se frayer un passage
n. - (lit, gén, Mil, Tech, Archit) poussée, portée (d'une discussion), pointe (dirigé contre)

idioms:

  • thrust upon    imposer sur, faire endosser

Deutsch (German)
n. - Stoß, Hieb, Stich, Seitenhieb, Vorstoß, Schub
v. - aufhalsen, zustechen, stoßen, sich drängen

idioms:

  • thrust upon    aufhalsen

Ελληνική (Greek)
n. - σπρωξιά ή απώθηση, ώθηση, φραστική επίθεση, έντονη και συνεχής πίεση, μπήξιμο, νύξη, πλήγμα με αιχμηρό όπλο
v. - μπήγω/-ομαι, καρφώνω/-ομαι, χώνω/-ομαι, σπρώχνω βίαια, διαπερνώ, διασχίζω, περνώ

idioms:

  • thrust upon    φορτώνω με κάτι, επιβάλλω

Italiano (Italian)
forzare, infilare, infilzare, spingere, spinta, coltellata, forza motrice

idioms:

  • thrust upon    affibbiare

Português (Portuguese)
n. - empurrão (m), impulso (m)
v. - meter, enfiar

idioms:

  • thrust upon    impor

Русский (Russian)
колоть, резко толкать, тыкать, силой продвигаться вперед, колющий удар, продвижение вперед при применении силы

idioms:

  • thrust upon    заставить кого-л. сделать/принять что-л. против его воли

Español (Spanish)
v. tr. - empujar, impeler, clavar, meter, introducir
v. intr. - empujar, meterse, introducirse, abrirse paso
n. - empujón, estocada, arremetida, pulla

idioms:

  • thrust upon    imponer, forzar a aceptar

Svenska (Swedish)
n. - stöt, knuff, anfall, huvudriktning, huvudtema, drivkraft, kläm, drive
v. - sticka, stoppa, köra, stöta, tvinga, anfalla, knuffa, driva

中文(简体) (Chinese (Simplified))
插入, 刺, 猛推, 戳, 插, 猛攻, 突进

idioms:

  • thrust upon    强迫..., 把...强加于...

中文(繁體) (Chinese (Traditional))
v. tr. - 插入, 刺, 猛推
v. intr. - 插入, 戳, 刺
n. - 猛推, 插, 刺, 猛攻, 突進

idioms:

  • thrust upon    強迫..., 把...強加於...

한국어 (Korean)
v. tr. - 밀다, 찌르다, 억지로 ~ 시키다
v. intr. - 떠밀다, 돌진하다, 밀치다
n. - 밀침, 습격, 전진

idioms:

  • thrust upon    억지로 떠맡기다, 떠맡겨 팔다

日本語 (Japanese)
v. - 強く押す, 突き進む, 突っ込む, 突き刺す, 押し出す, 押し込む, 差し出す
n. - 押し, 猛攻撃, 激しい攻撃, 推進力, 酷評, 攻撃, 推力

idioms:

  • thrust upon    押し付ける

العربيه (Arabic)
‏(الاسم) قوة دافعه, ألدفع (فعل) يقحم, يدفع‏

עברית (Hebrew)
v. tr. - ‮דחף, דחק, פילס (דרך) בכוח, הטיל או כפה על‬
v. intr. - ‮נדחק, תקף בכידון, דקר, תקע‬
n. - ‮דחיפה, תחיבה, נעיצה, לחץ, מכה, מהלומה, התקפה, עקיצה, מתח בין חלקי קשת, כוח-הדחף של מנוע רקטי סילוני‬


 
 

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