The Group's first product was a hand held "aircraft telephone" and, over a 3 year-process of experimenting with various voice microphones, found the hands-free throat microphone built inside a flight helmet much more user-friendly in open- cockpit airplanes due to excessive wind noise and vibrations. During World War I, British Engineers led by Charles Edmon Prince added earphones (now called headphones) and a throat microphone to make a "hands-free" communications systems for Flight Helmets – then called "aircraft telephones". In the first days of aviation, the leather helmets used in motor-racing were adopted by pilots as head protection.
Compatibility with an oxygen mask (for high-altitude flight and NBC protection).Comfort – including the weight, centre of gravity and provision for cooling and ventilation.The design of a flight helmet may also consider: A helmet mounted display, mounting for night vision goggles and/or a helmet tracking system (so the aircraft knows where the pilot is looking).Noise attenuation, headphones and a microphone (except when included in a mask).A visor to shield the eyes from sunlight, flash and laser beams.in the event of a parachute landing) and protection from wind blast (e.g. Impact protection to reduce the risk of head injury (e.g.NASA helmet for the Northrop T-38 Talon aircraft German leather flight helmet of World War IĪ flight helmet, sometimes referred to as a "bone dome" or "foam dome", is a special type of helmet primarily worn by military aircrew.
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