The system consisted of a gyroscopic stabilizer, a directive gyroscope, an aneroid barometer to regulate height, servo-motors for control of rudders and ailerons, and a device for distance gearing.
22.
On the flight deck, the definitive instrument for measuring altitude is the pressure altimeter, which is an aneroid barometer with a front face indicating distance ( feet or metres ) instead of atmospheric pressure.
23.
Invented in 1844 by French scientist Lucien Vidi, the aneroid barometer uses a small, flexible metal box called an aneroid cell ( capsule ), which is made from an alloy of beryllium and copper.
24.
The aneroid altimeter is calibrated to show the pressure directly as an altitude above mean sea level, in accordance with a mathematical aneroid barometer where the needle made less than one revolution around the face from zero to full scale.
25.
His experiences in South America having convinced him of certain serious errors in the readings of aneroid barometers at high altitudes, he published a work entitled " How to Use the Aneroid Barometer " and succeeded in introducing important improvements in their construction.
26.
His experiences in South America having convinced him of certain serious errors in the readings of aneroid barometers at high altitudes, he published a work entitled " How to Use the Aneroid Barometer " and succeeded in introducing important improvements in their construction.
27.
He includes advice on essential equipment such as clothing including anorak or cagoule, compass, aneroid barometer, map, rucksack and climbing boots ( the most important item ), and when necessary, ice axe . balaclava, while a string vest is advisable to prevent heat loss in the cold.
