variable-inlet guide vane — A gas turbine engine in which the angle of the inlet guide vanes can be changed to meet the requirements of the engine operating conditions. These are normally in front of the first stage of an axial compressor and sometimes in the subsequent… … Aviation dictionary
variable intake — A variable geometry inlet whose shape can be varied to allow for changes in temperature, such as is experienced with a variation in altitude, engine airflow, and flight speed. In this type of intake, the oblique shock wave should be positioned to … Aviation dictionary
Variable Cycle Engine — In a Variable Cycle Engine (VCE) the engine cycle is deliberately modified from that which would occur under normal circumstances.The next generation of Supersonic transport (SST) may require some form of VCE. SST engines require a high Specific… … Wikipedia
Variable valve timing — Variable valve timing, or VVT, is a generic term for an automobile piston engine technology. VVT allows the lift or duration or timing (some or all) of the intake or exhaust valves (or both) to be changed while the engine is in operation. Two… … Wikipedia
Variable length intake manifold — (VLIM) is an automobile engine manifold technology. As the name implies, VLIM can vary the length of the intake tract in order to optimize power and torque, as well as provide better fuel efficiency.There are two main effects of variable intake… … Wikipedia
Variable compression ratio — is the technology to adjust internal combustion engine cylinder compression ratios on the fly. This is done to increase fuel efficiency while under varying loads. Higher loads require lower ratios to be more efficient and vice versa. Variable… … Wikipedia
Variable geometry turbocharger — Variable geometry turbochargers (VGTs) are a family of turbochargers, usually designed to allow the effective aspect ratio (sometimes called A/R Ratio) of the turbo to be altered as conditions change. This is done because optimum aspect ratio at… … Wikipedia
Inlet cone — Infobox Aviation name=Inlet cone caption=Inlet cone of a MiG 21MFInlet cones (sometimes called shock cones) are a component of some supersonic aircraft. They are primarily used on ramjets, such as the turboramjets of the SR 71 or the pure ramjets … Wikipedia
Variable Valve Control — VVC (Variable Valve Control) is an automobile variable valve timing technology developed by Rover and applied to some high performance variants of the companies K Series 1800cc engine.In order to improve the optimisation of the valve timing for… … Wikipedia
inlet strut assembly — Spikelike stationary airfoils that are a part of the inlet case. They are used to support the front bearing housing and provide a passageway for oil and air line routing from outside the engine to the inside. Air intake with variable nose cone.… … Aviation dictionary
An example of variable inlet. In this case, the nose cone remains retracted from start up till aircraft achieves speed of Mach 1.3 when it moves fully forward. In other examples, it may keep moving at all speeds depending on altitude, speed, and throttle position.