By 1952 helicopters had developed enough to fly the Atlantic (in hops between the North Atlantic airfields and island land-bases developed in WWII).....USAF Sikorsky H-19s 'Whirl-O-Way' and 'Hop-A-Long' were met by a chartered BEA Viking containing Flight and Aeroplane journalists over Scotland at the end of the longest sector Keflavik-Prestwick ( 947 miles, 10hrs 10mins, 3hrs fuel remaining of 540gallons max ) www.flightglobal.com/pdfarchive/view/1952/1952%20-%202223.html www.flightglobal.com/pdfarchive/view/1952/1952%20-%202224.html