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Measure of turbomachinery speed
Specific speed Ns, is used to characterize turbomachinery speed. Common commercial and industrial practices use dimensioned versions which are of equal
Specific_speed
Change in velocity per amount of fuel
If mass is used, specific impulse is an impulse per unit of mass, which dimensional analysis shows to be equivalent to units of speed; this interpretation
Specific_impulse
Quotient of a quantity by mass
density Specific speed, unitless figure of merit[clarification needed] used to classify pump impellers (pump-specific) and turbines (turbine-specific). Ratio
Specific_quantity
established for driving at a measured speed within 3 to 10 percent over the speed limit, depending on the specific error margin of the radar. Built-up areas:
Speed_limits_in_Spain
Type of turbine
The specific speed is also the main criteria for matching a specific hydro site with the correct turbine type. The specific speed is the speed with which
Water_turbine
Design of impulse water turbine
doesn't need an airtight housing like the Francis. Third, it has higher specific speed and can handle a greater flow than the same diameter Pelton wheel, leading
Turgo_turbine
Speed at which a body orbits around the barycenter of a system
instantaneous orbital speed at a given point of the orbit can be computed from its distance to the central body and the object's specific orbital energy, sometimes
Orbital_speed
Evolution of water turbine
rates (Q). This implies that the specific speed (Ns) on which a Kaplan turbine functions is high, as specific speed (Nsp) is directly proportional to
Evolution from Francis turbine to Kaplan turbine
Evolution_from_Francis_turbine_to_Kaplan_turbine
Type of turbine
induction generator and a control mechanism, are used in Nepal. The specific speed η s {\displaystyle \eta _{s}} parameter is independent of a particular
Pelton_wheel
Speed recommendation by a governing body
the Basic Speed Law or rule (and is subject to enforcement as such) or is based on a maximum g-force exerted at a specific speed. Advisory speed limits are
Advisory_speed_limit
Physical quantity representing energy content per unit mass
the square root of two times the speed of the Earth. This comes to 42 km/s, or a specific energy of 882 MJ/kg. The speed relative to the Earth may be more
Specific_energy
Device that extracts energy from a fluid flow
specific speed. This number describes the speed of the turbine at its maximum efficiency with respect to the power and flow rate. The specific speed is
Turbine
Path for moving aircraft at an airport
Most airports do not have a specific speed limit for taxiways (though some do). There is a general rule on safe taxiing speed based on obstacles. Operators
Taxiway
expressed as a percentage per operating point (specific speed and mean torque). Due to the torque ripple, the speed of the shaft will oscillate as well, as the
Torque_ripple
publish any record. Speed skiing is performed in two principal categories : Speed One (S1), the best class, performed with specific speed skiing equipment
Speed_skiing_world_records
System for rating the speed of Quarter Horse racehorses
time is used instead of the specific track average. To calculate a specific speed index for a specific horse in a specific race, the time the horse finished
Speed_index
Rotor that increases fluid pressure and flow
change flow properties. Open impellers operate on a narrow range of specific speed. Open impellers are usually faster and easier to maintain. For small
Impeller
World record for speed
Overall speed record is the record for the highest average speed regardless of any criteria, categories or classes that all the more specific records
Speed_record
The following is a list of speed records for various types of vehicles. This list only presents the single greatest speed achieved in each broad record
List_of_vehicle_speed_records
thrust/total intake airflow. Low specific thrust engines tend to be more efficient of propellant (at subsonic speeds), but also have a lower effective
Specific_thrust
Speed of electromagnetic waves
The speed of light is the speed of electromagnetic waves. Light travels at slower speed inside materials like glass or water; its highest speed is in
Speed_of_light
Measuring device
A radar speed gun, also known as a radar gun, speed gun, or speed trap gun, is a device used to measure the speed of moving objects. It is commonly used
Radar_speed_gun
zones are variable speed zones, with a limit applying during gazetted school days (which may include pupil-free days) at specific times of the day. In
Speed_limits_in_Australia
Type of gearbox used on jet engines
needs to spin at a constant specific speed (typically 6,000 RPM for air-cooled generators). Since the jet engine gearbox speed varies from idle to full power
Constant-speed_drive
Dimensionless quantity in fluid dynamic
equal to the speed of sound. At Mach 0.65, u is 65% of the speed of sound (subsonic), and, at Mach 1.35, u is 35% faster than the speed of sound (supersonic)
Mach_number
Speed that exceeds five times the speed of sound (Mach 5 and above)
5–10. The hypersonic regime can also be alternatively defined as speeds where specific heat capacity changes with the temperature of the flow as the kinetic
Hypersonic_speed
have a variable maximum speed limit that depends on weather conditions. In dry weather, roads in urban areas have a default speed limit of 50 km/h, and
Speed_limits_in_France
Fuel efficiency of an engine design with respect to thrust output
travel at very different speeds.[not in body] Power-specific fuel consumption, the thrust-specific fuel consumption divided by speed, can have units of pounds
Thrust-specific fuel consumption
Thrust-specific_fuel_consumption
Games 500 meters Men". SpeedSkatingStats.com. Archived from the original on 2014-02-26. Retrieved 2012-09-18. Specific "Speed skating". International
List of Olympic medalists in speed skating
List_of_Olympic_medalists_in_speed_skating
Speed limits in Germany (German: Geschwindigkeitsbegrenzung) are set by the federal government. All limits are multiples of 10 km/h. There are two default
Speed_limits_in_Germany
Standard terms to define airspeeds
safety, aircraft performance, or both. The actual speeds represented by these designators are specific to a particular model of aircraft. They are expressed
V_speeds
2005 open world racing game
Need for Speed: Most Wanted is a 2005 racing video game, and the ninth installment in the Need for Speed series following Underground 2. Developed and
Need for Speed: Most Wanted (2005 video game)
Need_for_Speed:_Most_Wanted_(2005_video_game)
Machine used in textile finishing
its dimensions. Eventually, the stretched sheet is pulled off at a specific speed by a second set of rollers. At the delivery end, the edges are released
Stenter
1994 action film by Jan de Bont
Speed is a 1994 American action thriller film directed by Jan de Bont in his feature directorial debut, and written by Graham Yost. Keanu Reeves, Dennis
Speed_(1994_film)
Pump driven by a gas turbine
given tip speed u o u t {\displaystyle u_{out}} is at generating head. Head coefficient is typically selected (for a given specific speed) from empirical
Turbopump
Type of radiosport
possible. Competitors send a printed message of five character groups at a specific speed, which is judged for its accuracy by a panel of referees. Like the receiving
High-speed_telegraphy
Latin expression meaning "at first sight"
facie speed limit is a default speed limit that applies when no other specific speed limit is posted, and may be exceeded by a driver; however, if the driver
Prima_facie
impeller. The key performance metrics of an inducer is its suction specific speed Nss and its flow coefficient Φ (analogous to, but not the same as, the
Inducer_(pump_component)
Class of container ships
maximum of 21 TEU containers wide on deck. They are not designed with a specific speed and draft in mind and thus can be deployed on both east-west and north-south
H-class_container_ship
Optical device for recording images
mechanism. The frames are later played back in a ciné projector at a specific speed, called the frame rate (number of frames per second). While viewing
Camera
Sub-class of turbomachinery
is a function of pressure v {\displaystyle v} is the flow speed γ is the ratio of the specific heats of the fluid The identifying component of a centrifugal
Centrifugal_compressor
2004 racing video game
Need for Speed: Underground 2 is a 2004 racing video game developed by EA Black Box and published by Electronic Arts. It is the eighth installment in
Need_for_Speed:_Underground_2
Vehicle operated at a lower speed than other traffic
on road traffic does not require vehicles not reaching a specific speed to carry a specific mark. Indeed, Vienna convention just defines such as the two
Slow_moving_vehicle
Engine where combustion is pulsed instead of continuous
augmenter duct, the more drag it produces, and it is only effective within specific speed ranges. Valved pulsejet engines use a mechanical valve to control the
Pulsejet
surface, and the value increases as speed and altitude increases. As with other forms of specific energy, aircraft-specific energy is an intensive property
Aircraft_specific_energy
diameter N s {\displaystyle N_{s}} is the specific speed Cordier diagram can be used to determine specific speed and impeller tip diameter D t {\displaystyle
Blade_solidity
Electronic systems that help a vehicle driver while driving or parking
crosswind. Cruise control can maintain a specific speed pre-determined by the driver. The car will maintain the speed the driver sets until the driver hits
Advanced driver-assistance system
Advanced_driver-assistance_system
2022 racing video game
and features "playlists" with specific events tied to a specific performance level. The multiplayer mode features a "Speed Pass", which the game's downloadable
Need_for_Speed_Unbound
Type of combined-cycle jet engine
the atmosphere and require longer durations of lower thrust over a specific speed range the air turborocket can have a weight advantage over the standard
Air_turborocket
Integrated circuit customized for a specific task
An application-specific integrated circuit (ASIC /ˈeɪsɪk/) is an integrated circuit (IC) chip customized for a particular use, rather than intended for
Application-specific integrated circuit
Application-specific_integrated_circuit
Japanese high-speed rail system
colloquially known in English as the bullet train, is a network of primarily high-speed railway lines in Japan. The system was developed to provide connections
Shinkansen
Speed gauge in motor vehicles
spring is calibrated such that a given revolution speed of the cable corresponds to a specific speed indication on the speedometer. This calibration must
Speedometer
Speed of sound wave through elastic medium
The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. More simply, the speed of sound
Speed_of_sound
Parameter in the gravitational two-body problem
that, for any other position, the orbital speed. For an elliptic orbit the rate of change of the specific orbital energy with respect to a change in
Specific_orbital_energy
speed skating in the Czech Republic maintained by the Czech Speed Skating Federation. General Czech records 24 January 2026 updated Specific "Speed Skating
List of Czech records in speed skating
List_of_Czech_records_in_speed_skating
A speed limit is the limit of speed allowed by law for road vehicles, usually the maximum speed allowed. Occasionally, there is a minimum speed limit
Speed_limits_by_country
Measure of the fuel efficiency of internal combustion engines
low speed and high torque) to more than 1,000 g/(kW⋅h) (turboprop at low power level). The following table takes values as an example for the specific fuel
Brake-specific fuel consumption
Brake-specific_fuel_consumption
High-speed rail (HSR) has developed in Europe as an increasingly popular and efficient means of transport. The first high-speed rail lines on the continent
High-speed_rail_in_Europe
Ratio of strength to mass for a material
limit on the specific strength of any material. The specific strength is bounded to be no greater than c2 ≈ 9×1013 kN⋅m/kg, where c is the speed of light
Specific_strength
Maximum legal speed of vehicles
Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. Speed limits
Speed_limit
Netherlands did not have specific night speed limits until 2020.[citation needed] Nevertheless, many motorways have a posted speed limit of 120 km/h (75 mph)
Speed limits in the Netherlands
Speed_limits_in_the_Netherlands
Pulse that is substantially slowed to less than the speed of light
disturbances will travel at a specific speed, denoted by the symbol c. This well-known physical constant is commonly referred to as the speed of light. The postulate
Slow_light
Topics referred to by the same term
the smallest possible black hole that could exist while rotating at a specific speed White hole, the opposite of a black hole; a white hole continuously
Hypothetical_black_hole
Low-cost high-speed rail service
Valencia, Alicante and others on specific high-speed lines. Based on the popularity of the French low-cost high-speed rail service Ouigo that was introduced
Avlo
speed limits are set by each state or territory. States have also allowed counties and municipalities to enact typically lower limits. Highway speed limits
Speed limits in the United States
Speed_limits_in_the_United_States
Experimental research aircraft
criticized himself, because if we had told this boy [Apt] to stop at a specific speed, this wouldn't have happened." One point that became clear even before
Bell_X-2
Speed limits in the United States vary depending on jurisdiction. Rural freeway speed limits of 70 to 80 mph (113 to 129 km/h) are common in the Western
Speed limits in the United States by jurisdiction
Speed_limits_in_the_United_States_by_jurisdiction
General speed limits in New Zealand are set by the New Zealand government. The speed limit in each location is indicated on a nearby traffic sign or by
Speed_limits_in_New_Zealand
Aircraft propulsion system efficient at a range of speeds higher and lower than sound's
thereby reducing the specific thrust/mean jet velocity of the final exhaust. The mixed-flow design is not particularly efficient at low speed, but is considerably
Variable_cycle_engine
Exercising to increase endurance
rate decreases for running or cycling at a given speed. In cycling the effect of wind on the cyclists speed is difficult to subtract out and so many cyclists
Endurance_training
Food processing method
the output of the extruder, which rotate about the die openings at a specific speed. The product is then cooled and dried, becoming rigid while maintaining
Food_extrusion
Road producing a musical tune when driving over it
66 "music strips" that play tunes as vehicles drive over them at a specific speed of 80 km/h. For commuters travelling from Nariman Point to Worli, this
Musical_road
1997 film by Jan de Bont
Speed 2: Cruise Control is a 1997 American action thriller film produced and directed by Jan de Bont from a screenplay by Randall McCormick and Jeff Nathanson
Speed_2:_Cruise_Control
2006 racing video game
Need for Speed: Carbon is a 2006 racing video game and the tenth installment in the Need for Speed series. Developed by EA Black Box, Rovio Mobile and
Need_for_Speed:_Carbon
Mechanical transmission using multiple gears
for various reasons, including a special need for a gear to reach a specific speed or RPM for passing, racing and so on, or simply economic necessity that
Gear_train
Type of turbine
stage with lower flow rates. Thus these machines fall in the lower specific speed and power ranges. For high temperature applications rotor blade cooling
Radial_turbine
Amusement ride system in Disney parks
beneath the floor. The chain of vehicles maintains constant motion at a specific speed (usually about 2 feet or 60 centimeters per second throughout the entire
Omnimover
Interactive traffic sign
A radar speed sign or speed feedback sign is an interactive sign comprising a speed-measuring device (e.g. a loop detector or radar) and a message sign
Radar_speed_sign
Fan that induces gas flow mostly parallel to the shaft
fans are high specific speed devices operating them at high efficiency and to minimize the effects they have to be operated at low speeds. For controlling
Axial_fan_design
Projectile-resistant transparent armor
a specific pattern. Levels of protection are based on the ability of the target to stop a specific type of projectile traveling at a specific speed. Experiments
Bulletproof_glass
Displayed on the airspeed indicator on an aircraft
{\displaystyle \ \gamma \,} is the specific heat capacity ratio (≈1.401 for air). The IAS is not the actual speed through the air even when the aircraft
Indicated_airspeed
Hypersonic aircraft design
shock. Like the caret wing, they have to be designed to operate at a specific speed to properly attach the shock wave to the wing's leading edge, but unlike
Waverider
an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). The definitive visualisation
List_of_chemical_elements
Form of electroacoustic music
different speed than the one at which it was recorded. Sound looping: composers developed a skilled technique in order to create loops at specific locations
Musique_concrète
1950s British turbofan aircraft engine family
when spinning at a specific speed for any given input air pressure - in a perfect compressor, each stage would run at a separate speed. The multi-spool
Rolls-Royce_Conway
Online World of Wrestling. Specific Speed, Steven L. (2004). "Regional Territories: GWF #3". KayfabeMemories.com. Speed, Steven L. (2004). "Regional
List of former Global Wrestling Federation personnel
List_of_former_Global_Wrestling_Federation_personnel
German high speed train model
ICE 4 is a brand name for long-distance Intercity-Express high-speed trains being procured for Deutsche Bahn. Procurement started around 2008 for replacements
ICE_4
Standard for computer data connections
Enhanced SuperSpeed System – while preserving the SuperSpeed architecture and protocol (SuperSpeed USB) – with an additional SuperSpeedPlus architecture
USB
Machine to increase pressure of gas by reducing its volume
from the original on 2017-12-24. Kano, Fumikata. "Development of High Specific Speed Mixed Flow Compressors" (PDF). Texas A&M University. Archived from the
Compressor
Means by which a person dies by suicide
accessible leads to an overall reduction in the number of suicides. Method-specific ways to do this might include restricting access to pesticides, firearms
Suicide_methods
Jet engine where combustion takes place in supersonic airflow
launch vehicle due to the speed and altitude range involved, meaning that it must travel at an altitude specific to its speed. Because air density reduces
Scramjet
The following are the national records in speed skating in Australia maintained by the Australian Ice Racing Inc. Key to tables: Awaiting ratification
List of Australian records in speed skating
List_of_Australian_records_in_speed_skating
Meeting format designed to accelerate business contacts
Speed networking (or speed business meeting) is a meeting format designed to accelerate business contacts. Speed networking basically involves participants
Speed_networking
2012 open world racing video game
Need for Speed: Most Wanted is a 2012 racing game developed by Criterion Games and published by Electronic Arts. Most Wanted is the nineteenth title in
Need for Speed: Most Wanted (2012 video game)
Need_for_Speed:_Most_Wanted_(2012_video_game)
Device for reducing aerodynamic drag
by the environment's air. Race tracks demand specific aerodynamic configurations due to the varying speeds and track layouts. Configurations and devices
Spoiler_(car)
2005 video game
required cars to participate in specific events. Drag Race: In a long, straight race, players accelerate their car to top speed. This mode can only be played
Need for Speed: Underground Rivals
Need_for_Speed:_Underground_Rivals
Whirling aerophone
throughout a range of speeds (rather than at one specific speed), it is difficult to skip over harmonics, as this requires a jump in speed (rather than gradual
Whirly_tube
Paralympic sport
500 metre distances. A speed skating rink (or speed skating oval) is an ice rink (a specific type of sport venue) in which a speed skating competition is
Ice_sledge_racing
Baseball pitch thrown at a slower speed than a fastball
through bat speed are known as "junk" and include the knuckleball and the Eephus pitch, a sort of extreme changeup. The specific goals of off-speed pitches
Off-speed_pitch
Reciprocating engine where the pistons drive a cam-actuated shaft
linked to a drive mechanism, usually a shaft, which rotates the cam at a specific speed synchronized with the engine's combustion cycle to ensure the pistons
Cam_engine
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