Czek Family MakeIiDramatic Escape(in Stolen Plane1VIENNA (UPI) - A former Czechoslovak fighter pilot and his family were safely in Austraia Monday after a dramatic escapefrom behind the iron curtain in a stolen two-seater plane.Janus Pavelka, 40, a wartime Royal Air Force flier, told Austrian police he hod waited 10 years for his chance, lvast Saturday Pavelka, his wife,Eva, 35; his son, Janus, 4; his daughter, Maria, 6; and his bcotlH.er-in-law. Vaclav, 15, crept into the plane at the Aero Club of Deutsch Brod—only a few hundred yards from a military airbase.After 30 minutes of frantic efforts, the overloaded plane took off in tlie direction of Austria.Pavelka, who has not flown for at least 10 years, managed to land m a wheat field near Arbesbach,lower Austria, with a broken propeller and damaged fuselage.The only casualty was Janus, who had a bruised leg.“Neither I nor my wife was allowed to study by the Communistauthorities, Pavelka told Austrian police.“Our children are going to have it better.”Pavelka, a truck driver who speaks fluent German and English, said he hopes to emigrate to Britain where he has relatives ' and many war-time friends.