Paul Kollsman

Prior to 1928, there was no reliable or accurate way for airplane pilots to know how far above the ground they were. That all changed as a result of Paul Kollsman's invention of an accurate barometric altimeter, which measured altitude by assessing barometric pressure. By doing so, the altimeter was accurate within 20 feet and enabled pilots to fly "blind." To this day, commercial and civil aviation depends on the barometric altimeter as one of the cornerstones of safe, reliable air transportation.

Far Electrograph Ultraviolet Camera
Satellite Servicing Techniques
Hydroaeroplane
Space Capsule Design
Retractable Landing Gear; Folding Wing
Rotor Control Mechanism for Rotary Aircraft
Altimeter
Link Trainer/Simulator
Ethyl Gasoline
Flying Wing plane; All-Metal High-Wing Monocoque Airplane (Vega)
Communications Satellite
Spin Stabilized Synchronous Communications Satellite
Turbo Jet
Jet Engine
Supercritical Wing
Small Fan-Jet Engine
Aircraft Propulsion System - Jet Engine