NORDEN.
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Sight-head assemblies

The housing halves, cardan, telescope and rate-end mechanisms brought together above the stabilizer.

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The sight cardan carries the vertical gyro and telescope cradle. This is a different arrangement from the stabilizer’s directional gyro.

The motor and computer halves provide mechanical motion to the telescope system; the housing and end cover enclose these assemblies.

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 77

Sight upper housing

The upper casting and its attached inspection window, hollow eyecup, caging control and data-book holder.

PART · PAGE 77

Sight lower housing

The lower casting, glazed telescope window and supporting stem beneath the gyro and telescope cardan.

PART · PAGE 142

Sight end-cover assembly

The curved end cover, central bearing support and internal ribs closing the gyro end.

PART · PAGE 99

Vertical sight gyro

The vertical-axis rotor mechanism carried in the sight head. Its orientation supplies the telescope’s stabilizing reference.

PART · PAGE 99

Sight gyro and telescope cardan

The common casting supporting the vertical gyro and telescope cradle in separate openings.

PART · PAGE 100

Telescope cradle assembly

The frame that supports the telescope, its mirror drive, take-up drum and connecting fittings within the sight cardan.

PART · PAGE 100

Cradle mirror and sector drive

The pivoted mirror, open gear sector, integral shaft pinion and supporting brackets beneath the telescope.

PART · PAGE 82

Course knob assembly

The paired course controls and their shafts, gears and spring-loaded fittings at the sight end.

PART · PAGE 84

Altitude knob assembly

The knob, graduated setting mechanism and breaker-point adjustment associated with the rate motor’s governed drive.

PART · PAGE 184

Precession leveling knobs

The fore-and-aft and lateral leveling controls, with their quick-setting and constant-torque knob pairs, springs and friction contacts.

PART · PAGE 87

Rate-end motor half

The parallel-wound motor, centrifugal governor, breaker arm and transmission of the motor half.

PART · PAGE 87

Motor governor and breaker linkage

The crossed governor arms, sliding collar and connecting rod that move the telescope motor’s breaker arm.

PART · PAGE 86

Computer differential shaft and brackets

The coaxial side gears, opposed transverse pinions and carrier, with a two-axis support bridge and separate short shaft and spur gear.

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.

Lowry norden2.pdf, revised September 1, 1943, figure 45
Lowry norden2.pdf, revised September 1, 1943 · Fig. 45

Rate-end motor half and separate shafts; shared motor details, not installed clearances.

Lowry norden2.pdf, revised September 1, 1943
Lowry norden2.pdf, revised September 1, 1943

Motor governor and breaker mechanism context. No operational speed or targeting values inferred.

Lowry norden2.pdf, revised September 1, 1943, figure 44
Lowry norden2.pdf, revised September 1, 1943 · Fig. 44

Five separated bench assemblies; printed page 124. Spacing is not installed clearance.

Lowry norden2.pdf, revised September 1, 1943
Lowry norden2.pdf, revised September 1, 1943

Bomb sight and stabilizer M series, assembled context.

Lowry norden2.pdf, revised September 1, 1943, figure 30
Lowry norden2.pdf, revised September 1, 1943 · Fig. 30

Front and rear assembled context, not an exploded silhouette target.

AN 11-5A-8, figure 25,26
AN 11-5A-8 · Fig. 25,26

Complementary upper casting views, circular inspection window, ocular opening and data book holder.

Further reference sources