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Browse Prior Art Database

Navigation Computer

IP.com Disclosure Number: IPCOM000076230D
Original Publication Date: 1972-Jan-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

DeGarmo, RG: AUTHOR

Abstract

Navigational quantities, such as those required by an airplane pilot during flight, are computed, displayed, and updated as a function of the time of day and initial information entered by the pilot. The pilot is automatically warned of certain discrepancies between the initial information and computed quantities.

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Navigation Computer

Navigational quantities, such as those required by an airplane pilot during flight, are computed, displayed, and updated as a function of the time of day and initial information entered by the pilot. The pilot is automatically warned of certain discrepancies between the initial information and computed quantities.

The pilot's flight plan is divided into independently-handled legs defined by check points. Before starting the trip, the pilot enters the following initial information into the computer by rotating appropriate thumbwheel switches on the face of the control panel (Fig. 1): d - the distance planned for the first leg; t - the current local time; and r - the ground speed estimated for the first leg. In Fig. 2, the thumbwheel switches d and r are associated with registers which receive the manually adjusted quantities when the pilot pushes the start trip button. The thumbwheels for the time t are manual adjustments of a time-of-day clock constantly operated by, for instance, an oscillator and counter. The time of departure t(o) is recorded in a register when the start trip button is pushed.

By pushing the start trip button, which sets a flip-flop FF, the pilot also initiates utilization of arithmetic unit outputs as a function of the manually adjusted quantities t, d, and r and the time of departure t(o). These outputs supply the following navigational quantities to corresponding registers and displays: Estimated Time of Arrival "ETA" (C...