{"product_id":"9780942612707","title":"The Forgotten Bell HSL: U.S. Navy's First All-Weather Anti-Submarine Warfare Helicopter","description":"The Bell company won a Navy design competition in June 1950 for a helicopter specifically for anti-submarine warfare. This design, Bell Model 61, was the only Bell helicopter using the tandem-rotor layout; it was powered by a 2400 hp Pratt \u0026amp; Whitney R-2800-50 engine and was intended to carry air-to-surface missiles such as the Fairchild Petrel, as well as dipping ASDIC. Three XHSL-1 were ordered the first of these flying on March 4, 1953, followed by a production contract for 78, including 18 destined for the Britain's Fleet Air Arm.","brand":"ALL IN ENT\/UDIGG","offers":[{"title":"Default Title","offer_id":47034055852272,"sku":"9780942612707","price":19.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/9780942612707_p0.jpg?v=1763872915","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9780942612707","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}