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Towards the end of World War II, many information about advanced aeronautical technology were captured in Germany by the U.S. Forces. One of them was an analysis of the studies carried out by Dr. Alexander Lippisch on delta winged aircraft. Based upon the information, the Douglas firm developed the F4D Skyray, the only operational interceptor with delta wings in the U.S. Navy. Starting the design in 1947, Douglas was awarded a contract for the construction and testing of two prototypes in December 1948. The first prototype took off on its maiden flight in January 1951. The second prototype flew shortly thereafter and the airframe set two new world records, absolute speed record of 1,211 km/h and 100km closed course record of 1,171km/h, in October 1953. Having numerous improvements and refinements, the first production F4D-1 made its maiden flight in June 1954 and entered squadren service in April 1956. The distinctive 50 degree sweptback wings with round tips were equipped with leading edge slats and trailing edge elevons. A set of trimmers were installed on the inboard trailing edges of the wings. The outer portions of the wings could be folded upwards by oil pressure for carrier stowage. Although the Skyray never saw any combat, it proved its high capability as an interceptor with numerous world records and scramble actions in Taiwan in response to crises in the late 1950's.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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