Britain's New Sky Giant -- Seen in the air during a flight from Radlett Aerodrome, Hertfordshire, is one of Britain newest and fastest airliners, the Handley Page Hermes IV. seen on a flight from Radiett Aerodrome, Hertfordshire.The Hermes IV is a medium-long range type, and 25 of them are on order for the Empire routes of British Overseas Airways Corporation.The aircraft, a 37 tonner, is powered by four Bristol Hercules engines with a total horsepower of nearly 9,000. She has a top speed of nearly 360 miles an hoar and a cruising speed of 300 miles an hour, a payload of more than seven tons and a range of 3,600 miles. July 2, 1949. (Photo by Reuterphoto).