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Stabilizer directional gyro

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

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Follow the mechanism

The rotor turns inside its case. The case tilts about horizontal gudgeons inside the cardan.

The cardan rotates on vertical gudgeons. Its ring gear, slip rings and contact-sector relationship belong to that outer motion.

Open the enclosure, spin the rotor, tilt the case or separate the assemblies to compare the nested axes.

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

Parts in this component

PART · PAGE 25

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.

PART · PAGE 25

Directional gyro cardan

The cast support frame, upper and lower gudgeons, ring gear and four slip rings surrounding the directional gyro unit.

PART · PAGE 25

Precession and counter-balance bails

The case-mounted precession and counter-balance bails, together with the actuator that passes through the lower cardan gudgeon.

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