What is encuvator?

What air craft achieved forward propulsion by expelling a stream of fluid? What country has built a missile denfence shield covering two third of the country? How many tanks does the US have in total? Why is the challenger 2 the best tank in the world? How are helicopters refueled in air? What kind of World War 2 plane lookes like a European Typhoon? What are the limitations of the maximum forward speed of a helicopter? How many working spitfires are left? When a army driver required an assistant driver? Can you get a comparison of the Challenger 2 and M1A2 Abrams and Leopard 2 tanks? Do US military vehicles commonly have air conditioners? What are the Names of parts on a German World War 2 tank? What are the coordinates for the color Olive Drab? Who built the first plane that had a motor and a propeller? Do planes use four engines? How does the Chinook fly? What is another word for fortified? Is the Spitfire the most famous airplane in the world? What does the pto stand for on a m978 hemtt tanker? What does Iraq produce?