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aeronewsline :: Accueil :: Histoire :: Aéronefs 1945 à 1955
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Martin 2-0-2
par Koro Sam 22 Jan 2011, 16:36
Le Martin 202 sur Wikipedia.en
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The Martin 2-0-2 was one of the first modern airliners.
The twin-engined piston aircraft was designed and built by the [Vous devez être inscrit et connecté pour voir ce lien].
[Vous devez être inscrit et connecté pour voir ce lien]
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The Martin 2-0-2 was one of the first modern airliners.
The twin-engined piston aircraft was designed and built by the [Vous devez être inscrit et connecté pour voir ce lien].
Koro- CLUB
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Re: Martin 2-0-2
par Koro Sam 22 Jan 2011, 16:38
Design and development
[Vous devez être inscrit et connecté pour voir ce lien], president of the company, intended that the Model 202 would be a replacement for the [Vous devez être inscrit et connecté pour voir ce lien].
It was also known as the "Martin Executive".
The first flight of the Model 2-0-2 was in November 1946.
Full civilian certification was gained in August 1947.
This was several months before competing aircraft types.
The total production of 2-0-2 and 2-0-2A was 47 aircraft.
[Vous devez être inscrit et connecté pour voir ce lien], president of the company, intended that the Model 202 would be a replacement for the [Vous devez être inscrit et connecté pour voir ce lien].
It was also known as the "Martin Executive".
The first flight of the Model 2-0-2 was in November 1946.
Full civilian certification was gained in August 1947.
This was several months before competing aircraft types.
The total production of 2-0-2 and 2-0-2A was 47 aircraft.
Koro- CLUB
- Messages : 1175
Localisation : IDF
Re: Martin 2-0-2
par Koro Sam 22 Jan 2011, 16:41
The aircraft was non-pressurized but was considered a long range airliner.
A fatal crash in 1948 revealed a serious structural problem in the wings.
Structural [Vous devez être inscrit et connecté pour voir ce lien] was the problem in a major wing spar.
Alloy [Vous devez être inscrit et connecté pour voir ce lien]-T6 was used, which is susceptible to stress-corrosion cracking and low toughness.
The airliner was grounded and modifications were made.
The wing components were redesigned and the engines replaced.
The changed type was designated the Martin 2-0-2A.
A fatal crash in 1948 revealed a serious structural problem in the wings.
Structural [Vous devez être inscrit et connecté pour voir ce lien] was the problem in a major wing spar.
Alloy [Vous devez être inscrit et connecté pour voir ce lien]-T6 was used, which is susceptible to stress-corrosion cracking and low toughness.
The airliner was grounded and modifications were made.
The wing components were redesigned and the engines replaced.
The changed type was designated the Martin 2-0-2A.
Koro- CLUB
- Messages : 1175
Localisation : IDF
Re: Martin 2-0-2
par Koro Sam 22 Jan 2011, 16:43
Operational history
On November 13, 1945 [Vous devez être inscrit et connecté pour voir ce lien] purchased a fleet of 35 Martin 202's from the Glenn Martin Company, for a price of $7,000,000 [Vous devez être inscrit et connecté pour voir ce lien].
Two weeks later, [Vous devez être inscrit et connecté pour voir ce lien] announced they would purchase 20 airplanes at the price of $4,000,000 and scheduled for delivery in 1947.[Vous devez être inscrit et connecté pour voir ce lien]
Early in the next year, Martin announced Pennsylvania-Central Airlines ordered 15 more 202's bringing the total aircraft on order in early January 1947 to 137 aircraft, with a sales value of $27,000,000 .
On November 13, 1945 [Vous devez être inscrit et connecté pour voir ce lien] purchased a fleet of 35 Martin 202's from the Glenn Martin Company, for a price of $7,000,000 [Vous devez être inscrit et connecté pour voir ce lien].
Two weeks later, [Vous devez être inscrit et connecté pour voir ce lien] announced they would purchase 20 airplanes at the price of $4,000,000 and scheduled for delivery in 1947.[Vous devez être inscrit et connecté pour voir ce lien]
Early in the next year, Martin announced Pennsylvania-Central Airlines ordered 15 more 202's bringing the total aircraft on order in early January 1947 to 137 aircraft, with a sales value of $27,000,000 .
Koro- CLUB
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Localisation : IDF
Re: Martin 2-0-2
par Koro Sam 22 Jan 2011, 16:46
Despite the announcement of these large orders, the contract terms allowed the airlines to cancel them without any penalty.[Vous devez être inscrit et connecté pour voir ce lien]
The 2-0-2 was unpressurised, unlike the competing [Vous devez être inscrit et connecté pour voir ce lien].
Therefore, as delays in production built up, all airlines except Northwest, TWA, LAN and LAV called their orders and only 31 2-0-2s and 12 2-0-2As were actually delivered to the airlines.
[Vous devez être inscrit et connecté pour voir ce lien]
The 2-0-2 was unpressurised, unlike the competing [Vous devez être inscrit et connecté pour voir ce lien].
Therefore, as delays in production built up, all airlines except Northwest, TWA, LAN and LAV called their orders and only 31 2-0-2s and 12 2-0-2As were actually delivered to the airlines.
[Vous devez être inscrit et connecté pour voir ce lien]
Koro- CLUB
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Re: Martin 2-0-2
par Koro Sam 22 Jan 2011, 16:49
The 202 was the first airplane subjected to the CAA's then new 'Accelerated Service Test', introduced May 15, 1947.
In this test an airliner was to undergo a rigorous 150-hour test, attempting to squeeze one year's service into a week to ten day's flying.
The 202 made such a test visiting about 50 cities in 7 days.
At each city comprehensive inspections were made of the aircraft systems to assess how wear or malfunction would occur .
In this test an airliner was to undergo a rigorous 150-hour test, attempting to squeeze one year's service into a week to ten day's flying.
The 202 made such a test visiting about 50 cities in 7 days.
At each city comprehensive inspections were made of the aircraft systems to assess how wear or malfunction would occur .
Koro- CLUB
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Localisation : IDF
Re: Martin 2-0-2
par Koro Sam 22 Jan 2011, 16:51
TWA and Northwest, initial customers of the 2-0-2, eventually sold their Martin 2-0-2s to California Central and Pioneer Airlines.
Later, [Vous devez être inscrit et connecté pour voir ce lien] acquired many of the 2-0-2's as part of the company's expansion plans, beginning June 1, 1955. Eventually they acquired a total of 18 aircraft.
Only one of this type of aircraft is known to survive, at the [Vous devez être inscrit et connecté pour voir ce lien].
This airliner type was eventually developed into the [Vous devez être inscrit et connecté pour voir ce lien], which was far more successful.
Later, [Vous devez être inscrit et connecté pour voir ce lien] acquired many of the 2-0-2's as part of the company's expansion plans, beginning June 1, 1955. Eventually they acquired a total of 18 aircraft.
Only one of this type of aircraft is known to survive, at the [Vous devez être inscrit et connecté pour voir ce lien].
This airliner type was eventually developed into the [Vous devez être inscrit et connecté pour voir ce lien], which was far more successful.
Koro- CLUB
- Messages : 1175
Localisation : IDF
Re: Martin 2-0-2
par Koro Sam 22 Jan 2011, 16:54
Variants
The Martin Company designated the following quantities for the airlines (though not all were built), listed by Martin Model number:
The Martin Company designated the following quantities for the airlines (though not all were built), listed by Martin Model number:
- 2-0-2 - twin engine prototype: 3, in 1946
Koro- CLUB
- Messages : 1175
Localisation : IDF
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aeronewsline :: Accueil :: Histoire :: Aéronefs 1945 à 1955
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