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Junkers Ju 288
par Pacau Mar 23 Mar 2010, 13:41
La suite des Ju 88 et 188
Le Junkers 288 sur Wikipedia de langue anglaise :
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The [Vous devez être inscrit et connecté pour voir ce lien] Ju 288 was a [Vous devez être inscrit et connecté pour voir ce lien] project designed during [Vous devez être inscrit et connecté pour voir ce lien], but which only ever flew in [Vous devez être inscrit et connecté pour voir ce lien] form.
The first of 22 development aircraft flew on 29 November 1940.
Le Junkers 288 sur Wikipedia de langue anglaise :
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The [Vous devez être inscrit et connecté pour voir ce lien] Ju 288 was a [Vous devez être inscrit et connecté pour voir ce lien] project designed during [Vous devez être inscrit et connecté pour voir ce lien], but which only ever flew in [Vous devez être inscrit et connecté pour voir ce lien] form.
The first of 22 development aircraft flew on 29 November 1940.
Pacau- CLUB
- Messages : 434
Re: Junkers Ju 288
par Pacau Mar 23 Mar 2010, 13:44
Development
Prior to the opening of World War II, the [Vous devez être inscrit et connecté pour voir ce lien] bomber force was primarily aircraft of limited performance, some
originally developed with civilian uses in mind as well.
The only truly modern design in the inventory was the [Vous devez être inscrit et connecté pour voir ce lien], and although it outperformed the other designs it had numerous problems of its own.
Prior to the opening of World War II, the [Vous devez être inscrit et connecté pour voir ce lien] bomber force was primarily aircraft of limited performance, some
originally developed with civilian uses in mind as well.
The only truly modern design in the inventory was the [Vous devez être inscrit et connecté pour voir ce lien], and although it outperformed the other designs it had numerous problems of its own.
Pacau- CLUB
- Messages : 434
Re: Junkers Ju 288
par Pacau Mar 23 Mar 2010, 13:45
Perhaps most notable among these was its very small internal [Vous devez être inscrit et connecté pour voir ce lien] that forced it to carry some of its load
externally, slowing performance.
Junkers had been experimenting with a variety of improved models of the Ju 88 since 1937, powered by the [Vous devez être inscrit et connecté pour voir ce lien] or [Vous devez être inscrit et connecté pour voir ce lien] of [Vous devez être inscrit et connecté pour voir ce lien].
externally, slowing performance.
Junkers had been experimenting with a variety of improved models of the Ju 88 since 1937, powered by the [Vous devez être inscrit et connecté pour voir ce lien] or [Vous devez être inscrit et connecté pour voir ce lien] of [Vous devez être inscrit et connecté pour voir ce lien].
Pacau- CLUB
- Messages : 434
Re: Junkers Ju 288
par Pacau Mar 23 Mar 2010, 13:47
No serious work was undertaken on these versions, but after [Vous devez être inscrit et connecté pour voir ce lien] left [Vous devez être inscrit et connecté pour voir ce lien] and joined Junkers in 1939, the EF.74 design was submitted to the RLM in May 1939.
The EF.74 entry was essentially a scaled-up Ju 88, sharing its general layout and most of its [Vous devez être inscrit et connecté pour voir ce lien] and [Vous devez être inscrit et connecté pour voir ce lien] with extensions in various places.
The nose was completely redesigned, however, and featured a [Vous devez être inscrit et connecté pour voir ce lien].
All of the defensive armament was remotely-controlled, allowing it to be located in useful positions as well as eliminating "breaks" in the fuselage pressurization.
The EF.74 entry was essentially a scaled-up Ju 88, sharing its general layout and most of its [Vous devez être inscrit et connecté pour voir ce lien] and [Vous devez être inscrit et connecté pour voir ce lien] with extensions in various places.
The nose was completely redesigned, however, and featured a [Vous devez être inscrit et connecté pour voir ce lien].
All of the defensive armament was remotely-controlled, allowing it to be located in useful positions as well as eliminating "breaks" in the fuselage pressurization.
Pacau- CLUB
- Messages : 434
Re: Junkers Ju 288
par Pacau Mar 23 Mar 2010, 13:49
The fuselage was expanded along its length to allow for a much larger bomb bay that would allow for an 3,630 kg
(8,000 lb) payload to be carried internally, eliminating the need to carry ordinance on outside [Vous devez être inscrit et connecté pour voir ce lien].
Performance would be greatly improved over the Ju 88, both due to the all-internal bombload and the greatly improved power.
(8,000 lb) payload to be carried internally, eliminating the need to carry ordinance on outside [Vous devez être inscrit et connecté pour voir ce lien].
Performance would be greatly improved over the Ju 88, both due to the all-internal bombload and the greatly improved power.
Pacau- CLUB
- Messages : 434
Re: Junkers Ju 288
par Pacau Mar 23 Mar 2010, 13:51
Accordingly the RLM sent out the specifications for [Vous devez être inscrit et connecté pour voir ce lien] in July 1939, the Ju 88 retroactively becoming the second aircraft to be designated Bomber A in the Luftwaffe's existence.
(The original usage, dating from 1936, was the specification for what became the [Vous devez être inscrit et connecté pour voir ce lien]).
(The original usage, dating from 1936, was the specification for what became the [Vous devez être inscrit et connecté pour voir ce lien]).
Pacau- CLUB
- Messages : 434
Re: Junkers Ju 288
par Pacau Mar 23 Mar 2010, 13:53
The Bomber B program aimed at replacing all of the [Vous devez être inscrit et connecté pour voir ce lien] in the Luftwaffe inventory with a new design based on the EF.74 or something with equal performance.
Bomber B was intended to have even better speed than the Ju 88, high-altitude cruising with a pressurised cockpit, heavier defensive armament, range allowing it to cover any point in the British Isles, and a massive 4,000 kg (8,820 lb) warload, double that of the earlier generation bombers.
A number of companies returned proposals, but these were to some extent a formality, the EF.74 had already been selected as the winner, and of the rest of the designs submitted, only the [Vous devez être inscrit et connecté pour voir ce lien] and [Vous devez être inscrit et connecté pour voir ce lien]
progressed even as far as prototypes.
Bomber B was intended to have even better speed than the Ju 88, high-altitude cruising with a pressurised cockpit, heavier defensive armament, range allowing it to cover any point in the British Isles, and a massive 4,000 kg (8,820 lb) warload, double that of the earlier generation bombers.
A number of companies returned proposals, but these were to some extent a formality, the EF.74 had already been selected as the winner, and of the rest of the designs submitted, only the [Vous devez être inscrit et connecté pour voir ce lien] and [Vous devez être inscrit et connecté pour voir ce lien]
progressed even as far as prototypes.
Pacau- CLUB
- Messages : 434
Re: Junkers Ju 288
par Pacau Mar 23 Mar 2010, 13:59
Work began on building prototypes soon after, and the first example was completed by mid-1940.
Power was supposed to be supplied by two 24-cylinder Jumo 222 six-bank, four cylinders per bank, [Vous devez être inscrit et connecté pour voir ce lien] output class powerplants, but problems with 222 development meant the first prototypes flew with [Vous devez être inscrit et connecté pour voir ce lien], instead.
The first flight-quality 222s did not arrive until October 1941, and even at this point it was clear they were nowhere near ready for full-scale production.
When it became apparent the 222 was not likely to become a viable powerplant, in May 1942, Junkers proposed replacing them with the much heavier [Vous devez être inscrit et connecté pour voir ce lien] instead.
Power was supposed to be supplied by two 24-cylinder Jumo 222 six-bank, four cylinders per bank, [Vous devez être inscrit et connecté pour voir ce lien] output class powerplants, but problems with 222 development meant the first prototypes flew with [Vous devez être inscrit et connecté pour voir ce lien], instead.
The first flight-quality 222s did not arrive until October 1941, and even at this point it was clear they were nowhere near ready for full-scale production.
When it became apparent the 222 was not likely to become a viable powerplant, in May 1942, Junkers proposed replacing them with the much heavier [Vous devez être inscrit et connecté pour voir ce lien] instead.
Pacau- CLUB
- Messages : 434
Re: Junkers Ju 288
par Pacau Mar 23 Mar 2010, 14:01
As these technical difficulties were being addressed, the lack of a [Vous devez être inscrit et connecté pour voir ce lien] doctrine within the Luftwaffe meant the mission and purpose of the Ju 288 remained nebulous throughout its development.
As an interim measure, RLM ordered the [Vous devez être inscrit et connecté pour voir ce lien], which was a fairly minor upgrade of the original Ju 88 incorporating the basic cockpit design of the never-produced Ju 88B.
Work continued on the 288 throughout, but in [Vous devez être inscrit et connecté pour voir ce lien] the project was finally abandoned as Luftwaffe priorities became more intensely focused on [Vous devez être inscrit et connecté pour voir ce lien] defense.
As an interim measure, RLM ordered the [Vous devez être inscrit et connecté pour voir ce lien], which was a fairly minor upgrade of the original Ju 88 incorporating the basic cockpit design of the never-produced Ju 88B.
Work continued on the 288 throughout, but in [Vous devez être inscrit et connecté pour voir ce lien] the project was finally abandoned as Luftwaffe priorities became more intensely focused on [Vous devez être inscrit et connecté pour voir ce lien] defense.
Pacau- CLUB
- Messages : 434
Re: Junkers Ju 288
par Pacau Mar 23 Mar 2010, 14:02
Operations
Although the 288 never even reached production status, let alone official operational service, the aircraft did see limited
combat duty.
In 1944, following the cancellation of the 288 programme, the surviving A and C series prototypes were hurriedly fitted with defensive armament and equipment and deployed as reconnaissance aircraft on the Eastern Front.
Although the 288 never even reached production status, let alone official operational service, the aircraft did see limited
combat duty.
In 1944, following the cancellation of the 288 programme, the surviving A and C series prototypes were hurriedly fitted with defensive armament and equipment and deployed as reconnaissance aircraft on the Eastern Front.
Pacau- CLUB
- Messages : 434
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