NORDEN.
THE MECHANICAL LIBRARY

Inside each assembly.

Explore serviceable parts—from the gyro unit to the telescope cradle. Turn them, separate their construction and follow the evidence back to the manual.

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 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.

PART · PAGE 26

Torque motor and magnetic clutches

Two opposed drives and their magnetic clutches provide corrective rotation to the stabilizer cardan.

PART · PAGE 22

Bombsight clutch

A slipping coupling between the directional reference and the sight, operated by a collar, lever and spring linkage.

PART · PAGE 22

Autopilot clutch

The separate slipping coupling associated with the autopilot and Pilot Direction Indicator linkage.

PART · PAGE 23

P.D.I. brush and drift clutch

The resistance unit, stabilized brush, sight-stem bushing and drift-clutch arrangement shown together in the manual cutaway.

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 86

Rate and displacement mechanism

Separate rate and displacement controls arranged around the disc-and-roller transmission.

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.

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 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 93

Telescope cable and sheaves

The installed cable path for the M-4-and-up arrangement, with five sheaves, guided passages and secured eyelets.

PART · PAGE 94

Cross-trail mechanism

The eccentric disc, dovetail slide and connecting linkage coupling sight-stem rotation to transverse telescope movement.

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 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.