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aeronewsline :: Accueil :: Histoire :: Aéronefs 1956 à 1965
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Re: Douglas DC-8
par Ugant Jeu 18 Nov 2010, 10:15
Super sixties
Timelines:
First flight: March 14, 1966.
FAA certification: September 2, 1966.
First delivery: January 26, 1967 [Vous devez être inscrit et connecté pour voir ce lien].
Entry into Service: February 25, 1967 [Vous devez être inscrit et connecté pour voir ce lien].
- The DC-8 Series 61 was designed for high capacity and medium range. It had the same wings, engines and pylons as the -53, and sacrificed range to gain capacity. Having decided to stretch the DC-8, Douglas inserted a 20 ft (6 m) plug in the forward fuselage and a 16 ft (5 m) plug aft, taking overall length to 187 ft (57 m) and giving the aircraft a very long, lean look that was (and is still) unique. Bending forces required strengthening of the structure, but the basic DC-8 design already had sufficient ground clearance to permit the one-third increase in cabin size without requiring longer landing gear. It was certified in September 1966 and typically carried 210 passengers, or 269 in high-density configuration. A total of 88 were sold.
Timelines:
First flight: March 14, 1966.
FAA certification: September 2, 1966.
First delivery: January 26, 1967 [Vous devez être inscrit et connecté pour voir ce lien].
Entry into Service: February 25, 1967 [Vous devez être inscrit et connecté pour voir ce lien].
Ugant- CLUB
- Messages : 3213
Re: Douglas DC-8
par Ugant Jeu 18 Nov 2010, 10:18
The long-range DC-8 Series 62 followed in April 1967. It had a much more modest stretch of just 6 feet 6 inches (1.98 m) (with 3 feet 3 inches (0.99 m) plugs fore and aft), the more powerful JT3D-7 engines as the -63, and a number of modifications to provide greater range.
3 feet (0.91 m) wingtip extensions reduced drag and added fuel capacity, and Douglas redesigned the engine pods, extending the pylons and substituting new shorter and neater nacelles, all in the cause of drag reduction.
3 feet (0.91 m) wingtip extensions reduced drag and added fuel capacity, and Douglas redesigned the engine pods, extending the pylons and substituting new shorter and neater nacelles, all in the cause of drag reduction.
Ugant- CLUB
- Messages : 3213
Re: Douglas DC-8
par Ugant Jeu 18 Nov 2010, 10:21
The engine pylons were redesigned to eliminate their protrusion above the wing and make them sweep forward more sharply, so that the engines were actually positioned some 40 inch further forward.
The engine pods were also modified featuring a reduction in pod diameter and the elimination of the -50 and -61 bypass duct.
The changes all contributed to improve the aircraft's aerodynamic efficiency.
The DC-8 Series 62 is slightly heavier than the -53 or -61 at 166 tons (151 tonnes), and able to seat 159 passengers, the -62 had a range with full payload of about 5,200 nmi (9,600 km), or about the same as the -53 but with 40 extra passengers.
A total of 67 were built.
The engine pods were also modified featuring a reduction in pod diameter and the elimination of the -50 and -61 bypass duct.
The changes all contributed to improve the aircraft's aerodynamic efficiency.
The DC-8 Series 62 is slightly heavier than the -53 or -61 at 166 tons (151 tonnes), and able to seat 159 passengers, the -62 had a range with full payload of about 5,200 nmi (9,600 km), or about the same as the -53 but with 40 extra passengers.
A total of 67 were built.
Ugant- CLUB
- Messages : 3213
Re: Douglas DC-8
par Ugant Jeu 18 Nov 2010, 10:27
The DC-8 Series 63 was the final new build variant and entered service in June 1968.
It combined the long fuselage of the -61 with the aerodynamic refinements, increased fuel capacity, and JT3D-7 turbofans of the -62.
This yielded a maximum take off weight of almost 175 tons (159 tonnes) and a range with full payload of 4,110 nmi (7,600 km).
A total of 107 were built, a little over half of them convertibles or dedicated freighters.
It combined the long fuselage of the -61 with the aerodynamic refinements, increased fuel capacity, and JT3D-7 turbofans of the -62.
This yielded a maximum take off weight of almost 175 tons (159 tonnes) and a range with full payload of 4,110 nmi (7,600 km).
A total of 107 were built, a little over half of them convertibles or dedicated freighters.
Ugant- CLUB
- Messages : 3213
Re: Douglas DC-8
par Ugant Jeu 18 Nov 2010, 10:29
Timelines:
First flight: April 10, 1967.
FAA certification: June 30, 1967.
First delivery: July 15, 1967 [Vous devez être inscrit et connecté pour voir ce lien].
Entry into Service: July 27, 1967 [Vous devez être inscrit et connecté pour voir ce lien].
Last delivery: May 1972 [Vous devez être inscrit et connecté pour voir ce lien].
First flight: April 10, 1967.
FAA certification: June 30, 1967.
First delivery: July 15, 1967 [Vous devez être inscrit et connecté pour voir ce lien].
Entry into Service: July 27, 1967 [Vous devez être inscrit et connecté pour voir ce lien].
Last delivery: May 1972 [Vous devez être inscrit et connecté pour voir ce lien].
Ugant- CLUB
- Messages : 3213
Re: Douglas DC-8
par Ugant Jeu 18 Nov 2010, 10:35
The DC-8-71 achieved the same end but required considerably more modification because the -61 did not already have the improved wings and relocated engines of the -62 and -63.
Maximum takeoff weights remained the same, but there was a slight reduction in payload because of the heavier engines.
Maximum takeoff weights remained the same, but there was a slight reduction in payload because of the heavier engines.
Ugant- CLUB
- Messages : 3213
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aeronewsline :: Accueil :: Histoire :: Aéronefs 1956 à 1965
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