Education and demonstration – Radio navigation – Simulated bearing or position or vehicle relative to radio...
Patent
1984-05-23
1986-08-26
Grieb, William H.
Education and demonstration
Radio navigation
Simulated bearing or position or vehicle relative to radio...
G09B 902
Patent
active
046080228
ABSTRACT:
A hand-held movable airplane or boat model is equipped on an outer face with gravity actuated simulations of actual navigational instruments. Two interchangeable compass rose discs are mounted each on a separate split shaft spindle protruding from the model. One disc is asymmetrically weighted to maintain the disc in one orientation while the model, held in a vertical plane, moves and rotates to simulate routes of travel. When used with an indicator on the front center of the model, the weighted disc simulates an azimuth directional gyro. One of the spindles is bored axially to admit an indicator shaft rotatably therethrough. An indicator arrow mounted orthogonally on the outer end of the shaft aligns with an orthogonal extension on the inner end of the shaft below the model. A transparent line extends from the shaft extension through a magnetic movable simulated Non Directional Beacon (NDB) or Radio Beacon (RB) to an edge mounted pulley which maintains a weighted end of the line away from the vertical surface over which the model and NDB/RB are moved. A non-weighted compass rose held stationary by a heading control knob simulates a fixed card Automatic Direction Finder (ADF) or Radio Direction Finder (RDF). The knob, secured within a slot in the model and held against the rose by a tensioned elastic band around the base of the bored spindle, may be turned to rotate the compass rose thereby simulating a rotatable card ADF/RDF. Moving the knob away from the rose in an L-shaped slot and placing the weighted disc on the bored spindle simulates a Radio Magnetic Indicator (RMI). A second indicator may be rotatably mounted in a small bore in the outer end of the first indicator shaft. A second weighted line from the pointer of the second indicator to an elevated edge mounted NDB/RB with the first indicator and weighted disc simulates a double-barred RMI.
REFERENCES:
patent: 2396141 (1946-03-01), Adorjan et al.
patent: 2404386 (1946-07-01), Levine et al.
patent: 4173080 (1979-11-01), Minnicks, III
patent: 4226028 (1980-10-01), Robson
Bellofatto Richard C.
Grieb William H.
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