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Directional gyro unit

The electrically driven rotor, its bearings and motor fittings, enclosed by a ribbed case. The whole case can tilt inside the cardan while the rotor spins within it.

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Follow the mechanism

The fixed field windings and brushes supply the motor. The armature, cup rotor and commutator turn together about a horizontal axis.

Gudgeons at the sides of the case carry the unit in the cardan. They are distinct from the rotor’s internal bearings.

Open the enclosure and play the slowed rotor motion; explode the groups to inspect their nesting.

Geometry follows the cited drawings and photographs. Unmeasured dimensions remain approximate; exploded spacing reveals existing model groups rather than a prescribed disassembly procedure.

Used in these components

COMPONENT · PAGE 25

Stabilizer directional gyro

A horizontal-axis gyro unit carried in a vertical-axis cardan, with electrical transfer, precession and balance fittings.

COMPONENT · PAGE 19

Stabilizer subsystem

The directional gyro, torque motor, clutches and indication linkage carried by the stabilizer housing.

Reference views

Inspect the full sheets as well as detail views. Figure numbers belong to their named document; similar-looking parts may be different variants.

AN 11-30-70, figure 42
AN 11-30-70 · Fig. 42

Exploded spacing is not assembled clearance.

AN 11-30-70, figure 43
AN 11-30-70 · Fig. 43

Exploded spacing is not assembled clearance.

AN 11-30-70, figure 44
AN 11-30-70 · Fig. 44

Exploded spacing is not assembled clearance.

NORDEN.pdf, Lowry 1943, PDF25 / printed7, figure 5
NORDEN.pdf, Lowry 1943, PDF25 / printed7 · Fig. 5

Near-front assembled gyro; check nested widths and all four exposed slip rings. Brush plug pair establishes horizontal case-local clocking; atlas screen diagonals are oblique projections.

norden2.pdf, Lowry Field revised September 1, 1943, figure 17
norden2.pdf, Lowry Field revised September 1, 1943 · Fig. 17

Separate scan of the same stated 1943 revision; disassembly and section topology, not measured dimensions.

norden2.pdf, Lowry Field revised September 1, 1943, figure 18
norden2.pdf, Lowry Field revised September 1, 1943 · Fig. 18

Separate scan of the same stated 1943 revision; disassembly and section topology, not measured dimensions.

Further reference sources