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The PL-01 was a Polish light tank concept created by OBRUM with support from BAE Systems, based on the Swedish CV90120-T light tank. [ 1 ] [ 2 ] The concept vehicle was first unveiled at the International Defence Industry Exhibition in Kielce on 2 September 2013, [ 3 ] but the project was scrapped in 2015.
Dimensionless numbers (or characteristic numbers) have an important role in analyzing the behavior of fluids and their flow as well as in other transport phenomena. [1] They include the Reynolds and the Mach numbers, which describe as ratios the relative magnitude of fluid and physical system characteristics, such as density, viscosity, speed of sound, and flow speed.
Motor oil, engine oil, or engine lubricant is any one of various substances used for the lubrication of internal combustion engines. They typically consist of base oils enhanced with various additives, particularly antiwear additives , detergents, dispersants , and, for multi-grade oils, viscosity index improvers .
The engine pressure ratio (EPR) is the total pressure ratio across a jet engine, measured as the ratio of the total pressure at the exit of the propelling nozzle divided by the total pressure at the entry to the compressor. [1] Jet engines use either EPR or compressor/fan RPM as an indicator of thrust. [2]
The highly regarded engine was named International Engine of the Year, Best Engine in the 1-litre to 1.4-litre category, and Green Engine of the Year, ahead of state-of-the-art hybrid and twin-turbo diesel competition.
The bypass ratio (BPR) of a turbofan engine is the ratio between the mass flow rate of the bypass stream to the mass flow rate entering the core. [1] A 10:1 bypass ratio, for example, means that 10 kg of air passes through the bypass duct for every 1 kg of air passing through the core.
Engine Control Unit (=EEC) EDR engineering data record EDTO extended diversion time operations: EEC electronic engine control EET estimated elapsed time EFB electronic flight bag: EFC 1: Engine Flight Cycle EFC 2: expect further clearance EFD Electronic flight display EFFRA engine failure flap retraction altitude EFIS electronic flight ...
Volumetric efficiency (VE) in internal combustion engine engineering is defined as the ratio of the equivalent volume of the fresh air drawn into the cylinder during the intake stroke (if the gases were at the reference condition for density) to the volume of the cylinder itself.