Relay Unit RE-22/ARW-9 of AN/ARW-10A Airborne Remote Control Bomb Release System BOXED C-130 set zero of scale on

set zero of scale on rear index (G)

Here is an Altimeter used in early military aircraft of the US Navy

Here is a vintage Aircraft Compass

stub Axle diameter

a directional stabilizer

Relay Unit RE-22/ARW-9 of AN/ARW-10A Airborne Remote Control Bomb Release System BOXED C-130 set zero of scale onThe AN ARW 10A Airborne Remote Control Bomb Release System was developed during WWII but did not see active use until the Korean War. The system was designed to release bombs simultaneously from all planes in a formation, usually twelve, by a single bombardier in the lead aircraft. Three pages in the photo gallery explain the system in greater detail. During WWII, bombardiers often released their bombs manually upon observing the drop of the lead