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Avro 707
par SAPIENS Sam 12 Juin 2010, 00:18
L'Avro 707 raconté sur Wikipedia, en anglais :
[Vous devez être inscrit et connecté pour voir ce lien]
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The Avro 707 was a British experimental aircraft built to test the [Vous devez être inscrit et connecté pour voir ce lien] thick [Vous devez être inscrit et connecté pour voir ce lien] configuration chosen for the Avro 698 jet [Vous devez être inscrit et connecté pour voir ce lien], later named the [Vous devez être inscrit et connecté pour voir ce lien]. In particular, the low-speed characteristics of such aircraft were not well known at the time.
Aerodynamically, it was a ⅓-scale version of the Vulcan.
[Vous devez être inscrit et connecté pour voir ce lien]
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The Avro 707 was a British experimental aircraft built to test the [Vous devez être inscrit et connecté pour voir ce lien] thick [Vous devez être inscrit et connecté pour voir ce lien] configuration chosen for the Avro 698 jet [Vous devez être inscrit et connecté pour voir ce lien], later named the [Vous devez être inscrit et connecté pour voir ce lien]. In particular, the low-speed characteristics of such aircraft were not well known at the time.
Aerodynamically, it was a ⅓-scale version of the Vulcan.
SAPIENS- CLUB
- Messages : 513
Re: Avro 707
par SAPIENS Sam 12 Juin 2010, 00:20
Design and development
The 707 was a delta design, with a wing with about 50° sweep, without a horizontal tail on a fin with trailing edge sweep.
The trailing edge of the wing carried two pairs of control surfaces: inboard [Vous devez être inscrit et connecté pour voir ce lien] and outboard [Vous devez être inscrit et connecté pour voir ce lien].
Retractable [Vous devez être inscrit et connecté pour voir ce lien] were provided above and below the wings
The 707 was a delta design, with a wing with about 50° sweep, without a horizontal tail on a fin with trailing edge sweep.
The trailing edge of the wing carried two pairs of control surfaces: inboard [Vous devez être inscrit et connecté pour voir ce lien] and outboard [Vous devez être inscrit et connecté pour voir ce lien].
Retractable [Vous devez être inscrit et connecté pour voir ce lien] were provided above and below the wings
SAPIENS- CLUB
- Messages : 513
Re: Avro 707
par SAPIENS Sam 12 Juin 2010, 00:23
The prototypes were ordered by the Ministry to [Vous devez être inscrit et connecté pour voir ce lien].
The aircraft were produced quickly using a few components from other aircraft.
The 707 programme provided valuable insights into the Vulcan's flight characteristics, most of the information coming from the second and third machines which flew before the Vulcan.
The aircraft were produced quickly using a few components from other aircraft.
The 707 programme provided valuable insights into the Vulcan's flight characteristics, most of the information coming from the second and third machines which flew before the Vulcan.
SAPIENS- CLUB
- Messages : 513
Re: Avro 707
par SAPIENS Sam 12 Juin 2010, 00:25
All 707s were powered by a single Rolls Royce Derwent centrifugal turbojet.
Five 707s were built altogether; the last three flew after the Vulcan's first flight on 30 August 1952.
Five 707s were built altogether; the last three flew after the Vulcan's first flight on 30 August 1952.
SAPIENS- CLUB
- Messages : 513
Re: Avro 707
par SAPIENS Sam 12 Juin 2010, 00:26
The first, the Avro 707, VX784 first flew on 4 September 1949 but crashed less than a month later, on 30 September.
The next machine, the 707B, VX790 had a longer nose, different cockpit canopy (the earlier 707 had one from a Gloster
Meteor), a wing of different (51°) sweep and a longer nose wheel leg to provide the high angle of incidence required by deltas for landing and take off.
The next machine, the 707B, VX790 had a longer nose, different cockpit canopy (the earlier 707 had one from a Gloster
Meteor), a wing of different (51°) sweep and a longer nose wheel leg to provide the high angle of incidence required by deltas for landing and take off.
SAPIENS- CLUB
- Messages : 513
Re: Avro 707
par SAPIENS Sam 12 Juin 2010, 00:31
The 707B was given the same dorsal engine intakes as the 707, though this was later modified to a N.A.C.A design.
It first flew on 6 September 1950. Both these aircraft were built to test low speed characteristics.
It first flew on 6 September 1950. Both these aircraft were built to test low speed characteristics.
SAPIENS- CLUB
- Messages : 513
Re: Avro 707
par SAPIENS Sam 12 Juin 2010, 00:33
The third aircraft, designated 707A, WD280 was built for higher speed testing.
Experience with the dorsal intakes of the 707B had shown that as speed increased the cockpit induced turbulence
interrupted intake airflow, so the intakes were moved to the wing roots.
When the Vulcan appeared it looked very much like an enlarged 707A.
Later, this 707A was used to test the compound leading edge sweep subsequently used on all Vulcans.
Though the first Vulcan prototype was now flying, a second 707A WX736 was built to speed the development programme, maiden fight on 20 February 1953.
Experience with the dorsal intakes of the 707B had shown that as speed increased the cockpit induced turbulence
interrupted intake airflow, so the intakes were moved to the wing roots.
When the Vulcan appeared it looked very much like an enlarged 707A.
Later, this 707A was used to test the compound leading edge sweep subsequently used on all Vulcans.
Though the first Vulcan prototype was now flying, a second 707A WX736 was built to speed the development programme, maiden fight on 20 February 1953.
SAPIENS- CLUB
- Messages : 513
Re: Avro 707
par SAPIENS Sam 12 Juin 2010, 00:35
The final variant was the two-seat 707C, WZ744, intended for delta handling familiarisation, maiden flight 1 July 1953.
Even after the Vulcan development phase was over, the four surviving 707s continued in use as research aircraft.
After the compound sweep investigation and a period with the Royal Aircraft Establishment (R.A.E) carrying out
handling trials with powered controls the first 707A went to the Aeronautical Research Laboratories in Australia for low-speed delta-wing airflow measurements.
The second 707A was also at the R.A.E from June 1953 for aerodynamic and - later - automatic control investigations.
Even after the Vulcan development phase was over, the four surviving 707s continued in use as research aircraft.
After the compound sweep investigation and a period with the Royal Aircraft Establishment (R.A.E) carrying out
handling trials with powered controls the first 707A went to the Aeronautical Research Laboratories in Australia for low-speed delta-wing airflow measurements.
The second 707A was also at the R.A.E from June 1953 for aerodynamic and - later - automatic control investigations.
SAPIENS- CLUB
- Messages : 513
Re: Avro 707
par SAPIENS Sam 12 Juin 2010, 00:38
The Avro 707B joined the R.A.E. in September 1952 and was one of the aircraft used by the Empire Test Pilots School from January to September 1956, when it was damaged on landing.
The two-seat 707C joined the R.A.E. January 1956; perhaps its most substantial research contribution was to the development of [Vous devez être inscrit et connecté pour voir ce lien] - probably the first of their kind - and fitted with a side stick controller.
This aircraft was flying with the R.A.E. until September 1966.
The two-seat 707C joined the R.A.E. January 1956; perhaps its most substantial research contribution was to the development of [Vous devez être inscrit et connecté pour voir ce lien] - probably the first of their kind - and fitted with a side stick controller.
This aircraft was flying with the R.A.E. until September 1966.
SAPIENS- CLUB
- Messages : 513
Re: Avro 707
par SAPIENS Sam 12 Juin 2010, 10:39
No 707s are now airworthy. Both examples of the Avro 707A variant survive.
One, WZ736 is preserved at the [Vous devez être inscrit et connecté pour voir ce lien], the other, WD280 at the [Vous devez être inscrit et connecté pour voir ce lien] Museum in [Vous devez être inscrit et connecté pour voir ce lien].
The single 707C two seater WZ744 is displayed at the [Vous devez être inscrit et connecté pour voir ce lien], Cosford near [Vous devez être inscrit et connecté pour voir ce lien].
One, WZ736 is preserved at the [Vous devez être inscrit et connecté pour voir ce lien], the other, WD280 at the [Vous devez être inscrit et connecté pour voir ce lien] Museum in [Vous devez être inscrit et connecté pour voir ce lien].
The single 707C two seater WZ744 is displayed at the [Vous devez être inscrit et connecté pour voir ce lien], Cosford near [Vous devez être inscrit et connecté pour voir ce lien].
SAPIENS- CLUB
- Messages : 513
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