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France. Manufacturer. Dyle et Bacalan, Bordeaux. First flight. 1926. Number built. 1. The Dyle et Bacalan DB-10 was a heavy night bomber, designed in France and flown in 1926. It was a twin engine, high wing, metal frame monoplane, distinguished by a very thick centre section wing which formed the forward fuselage and housed the engines.
8 July 1992. The Bede BD-10 was Jim Bede 's attempt to introduce the world's first kit-built jet-powered general aviation supersonic aircraft. [1] After several years of testing and modifications, the project was taken over by investors in order to produce fully completed civilian and military training aircraft, but these projects were never ...
Number built. 212 (Q1 2024) The Pilatus PC-24 is a light business jet produced by Pilatus Aircraft of Switzerland. Following the success of the PC-12 single engine turboprop, work on the twin engine jet began in 2007 for greater range and speed, keeping the rugged airfield capability. The aircraft was introduced on 21 May 2013 and rolled out on ...
Sound power level (SWL) or acoustic power level is a logarithmic measure of the power of a sound relative to a reference value. Sound power level, denoted LW and measured in dB, [9] is defined by: [10] where. P is the sound power; P0 is the reference sound power; 1 Np = 1 is the neper; 1 B = 1 / 2 ln 10 is the bel;
The Aircraft Classification Number (ACN) – Pavement Classification Number (PCN) method is a standardized international airport pavement rating system promulgated by the ICAO in 1981. The method has been the official ICAO pavement rating system for pavements intended for aircraft of apron (ramp) mass greater than 5700 kg from 1981 to 2020. [1]
The speed of sound (i.e., the longitudinal motion of wavefronts) is related to frequency and wavelength of a wave by =.. This is different from the particle velocity , which refers to the motion of molecules in the medium due to the sound, and relates to the plane wave pressure to the fluid density and sound speed by =.
The Kerrison Predictor was one of the first fully automated anti-aircraft fire-control systems. It was used to automate the aiming of the British Army 's Bofors 40 mm guns and provide accurate lead calculations through simple inputs on three main handwheels. The predictor could aim a gun at an aircraft based on simple inputs like the observed ...
Vinyl microgroove phonograph records typically yield 55-65 dB, though the first play of the higher-fidelity outer rings can achieve a dynamic range of 70 dB. [25] German magnetic tape in 1941 was reported to have had a dynamic range of 60 dB, [26] though modern day restoration experts of such tapes note 45-50 dB as the observed dynamic range. [27]