Compass, Aperiodic, US Military Aircraft, Pioneer 1811-1-B Smiths 1 Dual Manifold Pressure Indicator

1 Dual Manifold Pressure Indicator

but seems tight and has not been attempted

Power Plant

This Radio Compass Indicator is labeled for use in the WWII-era Air Corps US Army's C-3 Link Trainer

Compass, Aperiodic, US Military Aircraft, Pioneer 1811-1-B Smiths 1 Dual Manifold Pressure IndicatorThis appears to be a post WWII Direct Reading Aperiodic Compass used at the navigators station in US military aircraft. Made by Bendix, part number 1811 1 B. It appears to have never been put into service judging from its superb condition. An aperiodic compass, after being deflected, returns by one direct movement to its proper reading, without oscillation. It may have also been used in maritime vessels. It is similar to a WWII era D 12 compass, which