About 15,000 feet. But, they rarely operated that high.
Above 10-12,000 feet oxygen content of the thin air is so much less than what humans are accustomed to that flying above 10,000 feet subjects pilots to the risk of passing out from lack of oxygen. This condition comes on pilots without their being aware of it, a feeling of great drowsiness, and obviously can lead to crashing before the pilot recovers, while screaming earthward back into thicker air.
Despite this, some WWI pilots did fly at altitudes up to 20,000 feet. The temperatures were well below zero over Europe at that altitude, and these were open cockpit aircraft, so the pilot was also subjected to the wind chill of his speed of 120-140 mph. Forstbite was common.
I can only think of one type of WWI aircraft which had an enclosed cockpit, and it was a bomber. But none of them carried an oxygen system or had pressurized cabins.
Planes used to fly at night in World War 2 because when it was dark, the bomber's were able to see who had their lights on clearly - making a perfect target.
34,000 feet
B-19 bomber was the largest US aircraft but it did not go into production. The Hughes flying boat was also very large but it did not fly until 1947.
1,000,000 miles high
no, there was not advanced enough equipment for autopilot to take place. it requires the use of a computer, which back then they simply did not have. even autopilots these days aren't very smart, you need tell it where to fly, how fast to fly, how high to fly, vertical airspeed ect...
The stealth bomber can fly up to 50,000 ft above sea level.
Planes used to fly at night in World War 2 because when it was dark, the bomber's were able to see who had their lights on clearly - making a perfect target.
34,000 feet
About 50,000 ft
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B-19 bomber was the largest US aircraft but it did not go into production. The Hughes flying boat was also very large but it did not fly until 1947.
In the conflict the US had a few bombers. The A-10 Thunderbolt II was one of them. The B-1 bomber was another. The B-2 Spirit is a multi-role bomber capable of delivering both conventional and nuclear munitions. B-52 Stratofortress is a heavy bomber can fly at high subsonic speeds at altitudes up to 50,000 feet.
1,000,000 miles high
Bombers 30,000 ft Fighters 40,000 ft
Marines fly the F/A 18 which is an attack bomber in some roles.
Good aerodynamics and powerful engines.
tom hickens