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Aircraft tires can be filled with regular compressed air, however pure nitrogen is also often used.
air fuel
They use air filled tyres, which is why you see them getting punctures.
hot-air balloon
It looks live a plane it is a v60
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Ryanair air only operates one type of aircraft - the Boeing 737-800 series (737-8as) variant
That depends on who old/used the type is.
I believe they operate the Airbus 320 from Bahrain to Larnaca.
Balloons, dirigibles and zeppelins are lighter than air aircraft. Gliders may count as well but I am not positive.
An aircraft is designed to fly in 'air' there is no 'air' in space.
In US service it is a fighter aircraft. However, the Israeli Air Force loves it and has developed recce, bomber and multi-role aircraft from it. Their latest, the F-16 "Sufa" is a real winner.