DC-7 Crash Test: "Transport Crash Safety Test" 1964 Federal Aviation Administration
more at
http://scitech.quickfound.net/aviation_news_and_search
.html
Classic airplane crash test film.
FAA film FA-515
see also:
Lockheed Constellation Crash Test: "
Transport Crash
Safety Test Part 2" 1966 FAA
https://www.youtube.com/watch?v=rc-lgthw_GM
Public domain film from the FAA, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
http://creativecommons.org/licenses/by-sa/
3.0/
http://en.wikipedia.org/wiki/Douglas_DC-7
The
Douglas DC-7 is an
American transport aircraft built by the
Douglas Aircraft Company from
1953 to
1958. It was the last major piston engine powered transport made by
Douglas, coming just a few years before the advent of jet aircraft such as the
Boeing 707 and
Douglas DC-8...
Design and development
In
1945 Pan American World Airways requested a
DC-7, a civilian version of the
Douglas C-74 Globemaster military transport.
Pan Am canceled its order shortly afterward; that DC-7 is unrelated to the later airliner.
American Airlines revived the designation when it requested an aircraft that could fly the
USA coast to coast non-stop in about eight hours.
Robert Rummel (at the time head of engineering at
TWA) has stated that pilot union rules limiting flying time to eight hours per day influenced American's request to Douglas. Douglas was reluctant to build the aircraft until American Airlines president
C. R. Smith placed a firm order for 25 at a price of $40 million, thus covering Douglas' development costs. The DC-7 used the
DC-4's wing with a fuselage 3 feet longer than the
DC-6. The engine was the eighteen-cylinder
Wright R-3350 Turbo-Compound. The prototype flew in May 1953 and American received its first DC-7 in November, inaugurating the first non-stop east-coast-to-west-coast service in the country (optimistically scheduled just under the eight-hour limit for one crew) and forcing rival TWA to offer a similar service with its
Super Constellations. Both aircraft frequently experienced in-flight engine failures, causing many flights to be diverted.
The DC-7 was followed by the DC-7B with slightly greater power and, on some DC-7Bs (Pan Am and
South African Airways), fuel tanks added in longer engine nacelles. South African Airways used this variant on its
Johannesburg to
London route. Pan Am's DC-7Bs started flying transatlantic in summer
1955, scheduled 1 hr 45 min faster than the Super
Stratocruiser from
New York to London or
Paris.
Operational history
The early DC-7s were only purchased by
U.S. carriers.
European carriers could not take advantage of the small range increase in the early DC-7, so Douglas released an extended-range variant, the
DC-7C (
Seven Seas) in
1956. Two 5 ft (1.5 m) wing-root inserts added fuel capacity, reduced interference drag, and made the cabin quieter by moving the engines farther outboard; all DC-7Cs had the nacelle fuel tanks previously seen on
Pan American's and
South African's DC-7Bs. The fuselage, which had been extended over the DC-6B's with a 40 in (
100 cm) plug behind the wing for the DC-7 and −7B, was lengthened with a similar plug ahead of the wing to give the DC-7C a total length of
112 ft 3 in (34.21 m).
Since the late
1940s Pan Am and other airlines had scheduled some nonstop flights from New York to
Europe, but westward nonstops against the prevailing winds were rarely possible with an economic payload. The 1049G and DC-7B that appeared in 1955 could make the trip if the headwinds weren't bad, but in summer 1956 Pan Am's DC-7C finally started making the westward trip fairly reliably.
BOAC was forced to respond by purchasing DC-7Cs rather than wait on the delivery of the
Bristol Britannia. The DC-7C found its way into several other overseas airlines' fleets, including
SAS, which used them for cross-polar service to
North America and
Asia. The DC-7C sold better than its rival, the
Lockheed L-1649A Starliner, which entered service a year later,[4] but sales were cut short by the arrival of Boeing 707 and
DC-8 jet aircraft in 1958--60.
Starting in
1959, Douglas began converting DC-7 and DC-7C aircraft into DC-7F freighters...
The predecessor DC-6, especially the DC-6B, had established, for its time, a reputation for straightforward engineering and reliability....
Carriers who had both DC-6s and DC-7s in their fleets usually replaced the newer DC-7s first once jets started to arrive. Some airlines had to scrap their DC-7s after little more than five years of service, whereas the vast majority of DC-6s lasted longer and sold more readily on the secondhand market.
Basic price of a new DC-7 was around £570,
000.
Price of a DC-7B was around £680,000 in 1955, rising to £820,000 in
1957...