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Inflight IFR procedures simulator

  • US 4,490,117 A
  • Filed: 06/11/1982
  • Issued: 12/25/1984
  • Est. Priority Date: 06/11/1982
  • Status: Expired due to Fees
First Claim
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1. An inflight IFR procedures simulator for generating signals and commands to built in conventional instruments provided in an airplane during actual airplane flight;

  • said airplane being equipped with a receiver antenna means which normally supplies navigational signals from ground stations to said built in conventional navigational instruments on board the airplane such as a navigational receiver (NAV), distance measuring equipment (DME), and automatic directional finder (ADF), and a marker beacon receiver, and a transponder, and communication receiver located in said airplane, said simulator comprising;

    (a) a signal synthesizer means generating predetermined simulated signals corresponding to navigational signals normally received from remote sources upon being activated;

    (b) a computer means connected to said signal synthesizer means causing said signal synthesizer means to produce simulated navigational signals responsive to programs during said actual flight;

    (c) means for supplying said programs to said computer means;

    (d) switching network means connected to said signal synthesizer, said antenna means and said navigational instruments and communication devices, means for selectively switching said switching network means between a first position and a second position, said switching network means when in said first position connecting said conventional built in navigational instruments to said synthesizer means and disconnecting said antenna means from said built in navigational instruments and communications means, said switching network means when in said second position connecting said antenna means to said built in navigational instruments and communications means and disconnecting said synthesizer means from said built in navigational instruments and said communications means;

    (e) pressure transducer means connected to said altimeter and a speed indicator for supplying electrical signals to said computer means indicating the altitude and speed of said airplane during said flight;

    (f) a compass means for supplying electrical signals to said computer means indicating the heading of said airplane during said flight; and

    (g) said computer means upon receiving signals from said pressure transducer means and compass means thereby computing signals that are fed to said signal synthesizer means which in turn generates simulated navigational signals during said actual flight training.

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