Formicidae
Formicidae (Formicoidea; ants; order Hymenoptera, suborder Apocrita) Family of insects in which the
petiole is composed of one or two narrow segments. All the known species are social. Males and females are usually
alate. After the nuptial flight, inseminated females shed their wings and found colonies by laying eggs and rearing larvae, often using the reserves in the now useless wing muscles. The female worker caste is always wingless, usually sterile, and often shows
polyethism. Some species are dulotic (see
DULOSIS). Most species are scavengers of animal remains; others are seed eaters, active predators, or fungus feeders. Many species obtain honeydew from
Homoptera. Nest sites range from cavities in wood or soil to carton or leaf constructions. Some species are symbiotic with plants. About 8000 species have been described, but the total number is probably around 13 000 species.
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Torque takeoff
Magazine article from: Mechanical Engineering; 10/1/2000; ; 700+ words
; ...behave. HELICOPTERS OFTEN DISPLAY a rotor torque reading on their instrument panels to...aircraft goes a step further. It brings torque readings from both rotors into a control...that has no system for measuring rotor torque takes on a bit of a penalty in performance...
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Torque wrench tidbits.(Tools ...)
Magazine article from: PS, the Preventive Maintenance Monthly; 10/1/2007; 700+ words
; ...ILLUSTRATIONS OMITTED] Before Torquing Not all torque wrenches are alike. If you've never used the torque wrench you're about to use, test it to...calibration. And make sure you choose the right torque wrench for the job. For instance, don...
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Demystifying torque control.(includes related articles on slot machine assembly and torque control in space)
Magazine article from: Assembly; 11/1/1998; ; 700+ words
; ...Understanding the variables that affect torque, and how to control them, is the first...tightening threaded fasteners correctly. Torque is a mystery to many manufacturers. Yet, controlling torque is critical for ensuring product quality...
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Torque audits are a good way to check joints.(Fastening THREADS)
Magazine article from: Assembly; 9/1/2008; ; 700+ words
; While installation torque methods certainly generate a lot of discussion...a bolted joint is generally referred to as a "torque audit," which measures a value known as "residual torque." [ILLUSTRATION OMITTED] Residual torque is...
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TORQUE TAKEOFF.(torque measurement technology)
Magazine article from: Mechanical Engineering-CIME; 10/1/2000; ; 700+ words
; ...behave. HELICOPTERS OFTEN DISPLAY a rotor torque reading on their instrument panels to...aircraft goes a step further. It brings torque readings from both rotors into a control...that has no system for measuring rotor torque takes on a bit of a penalty in performance...
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CHOOSING TORQUE TOOLS.
Magazine article from: Quality In Manufacturing; 9/1/2000; 700+ words
; ...closer look at pneumatic and electric torque wrenches, which are lighter, portable...harsh conditions. Selecting the right torque tool for the job can be crucially influenced by the type of torque power it delivers. When installing heavy...
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Torque-turn tactics. (threaded fastener tightening)
Magazine article from: Assembly; 10/1/1991; ; 700+ words
; ...processes involve controlling both input torque and angle of turn to achieve the desired...proper pre-load of the bolted assembly. Torque/angle curves provide practical information...tension created in a bolt when tightening torque is applied. Fortunately, torque/angle...
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Torque is the key: for motors in applications, the boilerplate approach to specification and design will get the system stopped because the motor won't start. Consider voltage, speed, and torque for these special instances, and follow along with the Case Of The Not-So-Centrifugal Pump Curve and the Case Of The Frequent Motor Failure to do some real-life motor-starting sleuthing.
Magazine article from: Engineered Systems; 10/1/2005; ; 700+ words
; ...load, or have non-centrifugal speed-torque characteristics. This article will review...successfully, a motor must develop and maintain torque in excess of that required by the load...gives the general relationship between torque and acceleration: t = ([WK.sup...
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TORQUE
Magazine article from: American Fastener Journal; 5/1/2008; ; 700+ words
; "Torque" is a simple term we all know and use to...understand the many variables that affect torque and how it is measured. For one, our unit...engine's horsepower rating in kW units and torque as a Newton-meter (N-m). When torque...
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Torque trade-offs: some suppliers tout the ergonomic benefits of their tools; others emphasize the accuracy of their products.(Fastening)
Magazine article from: Assembly; 4/1/2008; ; 700+ words
; ...make a tool ergonomic, including low torque reaction, quiet operation, and the ability...100 ft-lb. To apply that amount of torque with a manual wrench, an operator must...But are the nuts tightened correctly? Torque accuracy with impact wrenches depends...
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Torque
Book article from: Science of Everyday Things
...an object experiencing net torque is definitely not in equilibrium. In fact, torque provides a convenient means...equilibrium, the sum of all torques on the object should also...and Wrenches As for what torque is and how it works, it...
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torque
Book article from: The Columbia Encyclopedia, Sixth Edition
torque in physics, that which tends to change...also called the moment of force . The torque produced by rotating parts of an electric...to do useful work. The magnitude of the torque acting on a body is equal to the product...
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torque converter
Book article from: The Oxford Pocket Dictionary of Current English
torque con·vert·er • n. a device that transmits or multiplies torque generated by an engine.
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moment of inertia and precession
Book article from: The Oxford Companion to the Earth
...produced by a known torque. In the case of the Earth the only torques of sufficient magnitude...the lunar and solar torques on the Earth act...the Equator and no torque arises. The torque...solar precessional torques are proportional...There is thus a torque proportional to...
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Gyroscope
Encyclopedia entry from: The Gale Encyclopedia of Science
...first understand angular momentum and torque. Angular momentum can be thought of as...Vectors have magnitude and a direction. Torque, in contrast, can be thought of as the...distance it is applied from the pivot point. Torque (t) is defined as τ = r...
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