specific speed


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specific speed

[spə′sif·ik ′spēd]
(mechanical engineering)
A number, Ns , used to predict the performance of centrifugal and axial pumps or hydraulic turbines: for pumps, Ns = N √(Q)/ H 3/4; for turbines, Ns = N √(P)/ H 5/4, where Ns is specific speed, N is the rotational speed in revolutions per minute, Q is the rate of flow in gallons per minute, H is head in feet, and P is shaft horsepower.
References in periodicals archive ?
For media productions, a photographer can program it to drive a specific speed and distance via the digital joystick.
Most other riders from the club took to their turbo trainers to do specific speed or endurance work, to maintain base fitness and start to build themselves up for the upcoming season.
Major Al Naqbi urged all motorists and members of the public to abide by the specific speed limit and comply with rules such as leaving enough distance between vehicles.
On June 10th for boys and June 17th for girls Yun and his Athlete Training Program-Athletic Revolution-Hilliard is holding a one-day speed, agility, and quickness clinic at their facility in Hilliard (south of Dublin, OH and north of Grove City and West of Columbus) to share his company's revolutionary techniques to develop all-around specific speed and agility.
However, sailboat racing is subject to nature law regarding wind speed, in which a specific speed is required to enable sailors from racing with consideration of their safety.
With SDNs, districts don't have to sign up for a specific speed right up front, allowing for dialed up or dialed down broadband speeds, depending on specific needs.
The camerascan distinguish between small and large vehicles as well as taxis and other vehicles assigned specific speed limits.
The rotor breaker bars operate best at specific speed ranges for maximum results.
Known as ASTAR, or Airborne Spacing for Terminal Arrival Routes, the software is designed to give pilots specific speed information and guidance so that planes can be more precisely spaced, enabling pilots to fly a "follow the leader" approach to their destination airport.
Again, the high efficiency is because all stages are intercooled (isotherm compression), and the speed increasing gear allows all stages to operate in a higher specific speed.
For a two-phase MPDL where relatively high pressure rise is specified and relatively low flowrates are required compared to single-phase MPDL non centrifugal design such as gear pump is a preferred solution in terms of specific speed and achievable efficiency.
On the face of it this sounds a good idea because if cars are limited to a specific speed by satellite or roadside technology the move will wipe out speeding fines and obviate the use of camera vans and the like and give the police more time to concentrate on real criminals and as a result road safety will be enhanced with fewer deaths and serious injury.