Page 24 - December 2019
P. 24

Airfoil                                                   Bruce Artwick
        An airfoil or aerofoil is the cross-sectional shape of a   Bruce Artwick (born January 1, 1953) is an American
        wing, blade, or sail. An airfoil-shaped body moving       software engineer. He is the creator of the first
        through a fluid produces an aerodynamic force. The        consumer flight simulator software. He founded
        component of this force perpendicular to the direction    subLOGIC after graduating from the University of
        of motion is called lift. The component parallel to the   Illinois at Urbana-Champaign in 1977, and released
        direction of motion is called drag.                       the first version of Flight Simulator for the Apple II
                                                                  the following year. His original Apple II software was
        Airspeed Indicator
                                                                  purchased by Microsoft in 1982 and became
        The airspeed indicator shows the aircraft's speed
                                                                  Microsoft Flight Simulator.
        (usually in knots) relative to the surrounding air. It works
        by measuring the ram-air pressure in the aircraft's pitot   After subLOGIC, Bruce founded the Bruce Artwick
        tube relative to the ambient static pressure. The         Organization which continued development of flight
        indicated airspeed (IAS) must be corrected for            simulator products which were eventually bought
        nonstandard pressure and temperature in order to          out by Microsoft.
        obtain the true airspeed (TAS). The instrument is color
                                                                  CTAF
        coded to indicate important airspeeds such as the stall   Common traffic advisory frequency (CTAF) is the
        speed, never-exceed airspeed, or safe flap operation
                                                                  name given to the VHF radio frequency used for air-
        speeds.
                                                                  to-air communication at United States, Canadian and
        Attitude Indicator                                        Australian non-towered airports.
        The attitude indicator (also known as an artificial
                                                                  Community
        horizon) shows the aircraft's relation to the horizon.
                                                                  Flight Simulation is a great hobby, but it's even
        From this the pilot can tell whether the wings are level   better when people get involved. There are many
        (roll) and if the aircraft nose is pointing above or below
                                                                  ways to this, with some of the most popular being:
        the horizon (pitch). This is a primary instrument for
                                                                  posting in the forums, writing tutorials and reviews
        instrument flight and is also useful in conditions of poor   (something I enjoy doing), and if you are really keen,
        visibility. Pilots are trained to use other instruments in
                                                                  and have the time, creating scenery and objects.
        combination should this instrument or its power fail.
                                                                  Delta Wing
        Automatic Direction Finder (ADF)
                                                                  The delta wing is a wing shaped in the form of a
        The Automatic direction finder (ADF) indicator
                                                                  triangle. It is named for its similarity in shape to the
        instrument can be a fixed-card, movable card, or a Radio   Greek uppercase letter delta. Although long studied,
        Magnetic Indicator (RMI). An RMI is remotely coupled to
                                                                  it did not find significant applications until the jet
        a gyrocompass so that it automatically rotates the
                                                                  age, when it proved suitable for high-speed subsonic
        azimuth card to represent aircraft heading. While simple   and supersonic flight.
        ADF displays may have only one needle, a typical RMI
        has two, coupled to different ADF receivers, allowing for   DirectX
        position fixing using one instrument.                     Microsoft DirectX is a collection of application

        Blade Element Theory                                      programming interfaces for handling tasks related to
        Blade element theory (BET) is a mathematical process      multimedia, especially game programming and
        originally designed by William Froude (1878), David W.    video, on Microsoft platforms. Originally, the names
        Taylor (1893) and Stefan Drzewiecki to determine the      of these APIs all began with Direct, such as Direct3D,
        behavior of propellers. It involves breaking a blade down   DirectDraw, DirectMusic, DirectPlay, DirectSound,
        into several small parts then determining the forces on   and so forth. Both Microsoft Flight Simulator and
        each of these small blade elements.                       Prepar3D use DirectX.
   19   20   21   22   23   24   25   26   27   28   29