Wikipedia - Benutzerbeiträge [de]

Aero Commander

2004-08-18T22:00:47Z

Greyengine5:

'''Aero Design and Engineering Company''' was an [[aircraft manufacturer]], a [[subsidiary]] of [[Rockwell International]]. There most well known project was the [[Aero Commander]], a design used famously as a US presidential transport.

==References==
*[http://www.marchfield.org/u9.htm Aero Commander Article]

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[[Category:Aircraft manufacturers]]

Mac OS X Public Beta

2004-07-18T21:54:33Z

Greyengine5: link

The '''Mac OS X Public Beta''' was an early, test version of the [[Mac OS X]] operating system released to the public in late 2000 for $30. Hardcore [[Apple]] fans could therefore get a taste of the upcoming operating system before its final release.

The Public Beta was the first time people could use the [[Aqua (Mac OS X)|Aqua]] interface. Virtually everything was new in the [[Operating System]]: fonts, the Dock, even the menu bar (with an Apple logo at the centre, which was later repositioned). The icons exploded in size, and new OS eye candy was all the rage.

As it was a public beta, this version was not without its bugs and inconveniences. Apple used user feedback improve upon the OS, so that a vastly improved Golden Master version of Mac OS X was ready for release by [[March 2001]].

The Public Beta version came with a price tag, and a time limit (set for spring 2001). Still, the price tag and the time limit, and despite it being a piece of public beta software, it was still welcomed by the Mac community, with people eager to test drive the new OS.

The Public Beta was superseded by Mac OS X 10.0.0, the first final release of Mac OS X.

Prävalenzfehler

2004-07-18T01:00:41Z

Greyengine5:

The '''base rate fallacy''', also called '''base rate neglect''', is a [[logical fallacy]] that occurs when irrelevant information is used to make a [[probability]] judgment, especially when [[empirical]] [[statistics]] about the probability are available (called the "base rate" or "[[prior probability]]").

In some experiments, students were asked to estimate the [[Grade Point Average]]s of hypothetical students. When given relevant statistics about GPA distribution, students tended to ignore it if given descriptive information about the particular student, even if the new information did not seem to have anything to do with school performance.

[[Daniel Kahneman]] and [[Amos Tversky]] attempted to explain this finding in terms of the [[representativeness heuristic]].

[[Richard Nisbett]] has argued that some [[attributional bias]]es like the [[fundamental attribution error]] are instances of the base rate fallacy: people underutilize "consensus information" (the "base rate") about how others behaved in similar situations and instead prefer simpler dispositional attributions.

''See also:'' [[misleading vividness]].

==References==

* Bar-Hillel, M. (1980). The base-rate fallacy in probability judgments. ''Acta Psychologica'', 44, 211-233.
* Kahneman, D., & Tversky, A. (1973). On the psychology of prediction. ''Psychological Review'', 80, 237-251.
* Nisbett, R. E., Borgida, E., Crandall, R., & Reed, H. (1976). Popular induction: Information is not always informative. In J. S. Carroll & J. W. Payne (Eds.), ''Cognition and social behavior'', 2, 227-236.

==External links==

* [http://www.cia.gov/csi/books/19104/art15.html#ft145 Psychology of Intelligence Analysis: Base Rate Fallacy]

[[Category:Logical fallacies]]

Northrop YF-17

2004-04-14T01:46:14Z

Greyengine5:

'''YF-17 Cobra''' is a [[military aircraft]].

<div style="margin: 0 0 1em 1em; border:3px solid #cccccc; font-size:72%; font-family:Arial,Helvetica; float:right; width:320px;">
<table border="1" cellspacing="1">
<tr><th colspan="2" align="center">[[Image:YF17-1.jpg|thumb|center|300px|YF-17 Cobra (NASA photo)]]
</th></tr>
<tr><th colspan="2" bgcolor="cccccc">Specifications</th></tr>
<tr><td>Crew</td><td>1</td></tr>
<tr><td>Span</td><td>35 ft (10.7 m)</td></tr>
<tr><td>Length</td><td>56 ft (17.1 m)</td></tr>
<tr><td>Height</td><td>16 ft 6 in (5 m)</td></tr>
<tr><td>Weight (max take-off)</td><td>23,000 lb (10,400 kg)</td></tr>
<tr><td>Engines</td><td>2 [[General Electric]] Y-J-101 afterburning turbojets</td></tr>
<tr><td>Max Speed</td><td>[[Mach number|Mach]] 2+</td></tr>
<tr><td>Range (ferry)</td><td>2,990 miles (4,810 km)</td></tr>
<tr><td>Service Ceiling</td><td>50,000 ft (15,000 m)</td></tr>
<tr><td>Armament</td><td>20 mm M-61A1 Vulcan Cannon<br>2 [[AIM-9 Sidewinder]] missiles</td></tr>
</table>
</div>

The [[U.S. Air Force]], in 1972, sought proposals for a [[fighter]] that was small, low-cost, lightweight and easy to maintain. [[Northrop]] had experience with such requirments through its very successful [[F-5 Freedom Fighter]] and [[T-38 Talon]].

In a 1975 ''fly-off'', the Cobra competed against the [[General Dynamics]] [[F-16 Falcon]] and pilots reported very similar capabilities. General Dynamics had gambled by gearing up for immediate production, and so won the contract.

Though not selected by the Air Force, Northrop teamed up with [[McDonnell Douglas]] and developed the F-17 Cobra into the [[U.S. Navy]] [[F/A-18 Hornet]].

{| cellpadding="2" cellspacing="0" style=";clear:both;margin:5px auto; border:3px solid;width:60%; font-size:small;" align="center"
!bgcolor="#e0e0e0" colspan="2" align="center" style="border-bottom:3px solid"|Related content
|-
|'''Related Development'''
|align="center"|
[[F/A-18 Hornet]]
|-
|'''Similar Aircraft'''
|align="center"|
|-
|'''Designation Series'''
|align="center"|
[[F-14 Tomcat|F-14]] -
[[F-15 Eagle|F-15]] -
[[F-16 Fighting Falcon|F-16]] -
'''F-17''' -
[[F/A-18 Hornet|F/A-18]] -
[[F-20 Tigershark|F-20]] -
[[IAI Kfir|F-21]]
|-
|'''Related Lists'''
|align="center"|[[List of military aircraft of the United States]] - [[List of fighter aircraft]]
|-
|}
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Air Canada Tango

2004-04-06T00:50:49Z

Greyengine5:

'''Air Canada Tango''' is a low-cost airline supported by [[Air Canada]]. It only flies intra-[[Canada|Canadian]] flights.
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==External Links==
* [http://www.flytango.com Air Canada Tango Homepage]

United States Army Air Corps

2004-04-06T00:43:45Z

Greyengine5:

<div style="float:right;margin:0 0 1em 1em;font-style:italic;text-align:center;">[[Image:Us army air corps shield.png|United States Army Air Corps Seal]]

<small>Seal of the United States Army Air Corps<br>Public domain illustration from the [http://www.af.mil/art.html USAF Art Gallery]</small></div>What is now the [[United States Air Force]] (USAF) was formerly a part of the [[US Army]], namely the '''United States Army Air Corps''' or '''USAAC'''. It was established under this name by an act of [[United States Congress|Congress]] on [[July 2]], [[1926]]. During [[World War II]] its role grew greatly; the Air Corps eventually became subordinate to the [[United States Army Air Force]] (USAAF) when the latter was established on [[June 20]], [[1941]]. The required Congressional disestablishment of the Air Corps itself did not occur until [[1947]].

See also: [[Boeing P-26]]
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Northrop YF-17

2004-04-03T23:47:11Z

Greyengine5:

'''YF-17 Cobra''' is a [[military aircraft]].

<div style="float:right;margin:0 0 1em 1em;width:320px;">
<table border="1" cellspacing="1">
<tr><th colspan="2" align="center">[[Image:YF17-1.jpg|thumb|center|300px|YF-17 Cobra (NASA photo)]]
</th></tr>
<tr><th colspan="2" bgcolor="skyblue">Specifications</th></tr>
<tr><td>Crew</td><td>1</td></tr>
<tr><td>Span</td><td>35 ft (10.7 m)</td></tr>
<tr><td>Length</td><td>56 ft (17.1 m)</td></tr>
<tr><td>Height</td><td>16 ft 6 in (5 m)</td></tr>
<tr><td>Weight (max take-off)</td><td>23,000 lb (10,400 kg)</td></tr>
<tr><td>Engines</td><td>2 [[General Electric]] Y-J-101 afterburning turbojets</td></tr>
<tr><td>Max Speed</td><td>[[Mach number|Mach]] 2+</td></tr>
<tr><td>Range (ferry)</td><td>2,990 miles (4,810 km)</td></tr>
<tr><td>Service Ceiling</td><td>50,000 ft (15,000 m)</td></tr>
<tr><td>Armament</td><td>20 mm M-61A1 Vulcan Cannon<br>2 [[AIM-9 Sidewinder]] missiles</td></tr>
</table>
</div>

The [[U.S. Air Force]], in 1972, sought proposals for a [[fighter]] that was small, low-cost, lightweight and easy to maintain. [[Northrop]] had experience with such requirments through its very successful [[F-5 Freedom Fighter]] and [[T-38 Talon]].

In a 1975 ''fly-off'', the Cobra competed against the [[General Dynamics]] [[F-16 Falcon]] and pilots reported very similar capabilities. General Dynamics had gambled by gearing up for immediate production, and so won the contract.

Though not selected by the Air Force, Northrop teamed up with [[McDonnell Douglas]] and developed the F-17 Cobra into the [[U.S. Navy]] [[F/A-18 Hornet]].

{| cellpadding="2" cellspacing="0" style=";clear:both;margin:5px auto; border:3px solid;width:60%; font-size:small;" align="center"
!bgcolor="#e0e0e0" colspan="2" align="center" style="border-bottom:3px solid"|Related content
|-
|'''Related Development'''
|align="center"|
[[F/A-18 Hornet]]
|-
|'''Similar Aircraft'''
|align="center"|
|-
|'''Designation Series'''
|align="center"|
[[F-14 Tomcat|F-14]] -
[[F-15 Eagle|F-15]] -
[[F-16 Fighting Falcon|F-16]] -
'''F-17''' -
[[F/A-18 Hornet|F/A-18]] -
[[F-20 Tigershark|F-20]] -
[[IAI Kfir|F-21]]
|-
|'''Related Lists'''
|align="center"|[[List of military aircraft of the United States]] - [[List of fighter aircraft]]
|-
|}
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Douglas XTB2D

2004-04-03T22:40:11Z

Greyengine5:

<font face="Arial, Helvetica">
{| cellpadding="2" cellspacing="0" style="margin:3px; border:3px solid #87CEEB;width:30%; font-size:72%;" align="right"
!bgcolor="#87CEEB" colspan="3" align="center" style="border-bottom:3px solid"|Douglas TB2D Skypirate
|-
|colspan="3" align="center"|[[Image:TB2D Skypirate.jpg|300px|XTB2D Skypirate]]<br>''XTB2D-1 Skypirate prototype''
|-
!bgcolor="#87CEEB" colspan="3"|Description
|-
|Role||colspan="2"|Carrier-borne torpedo bomber
|-
|Crew||colspan="2"|3
|-
|First Flight||colspan="2"|1945
|-
|Manufacturer||colspan="2"|Douglas Aircraft Company
|-
!bgcolor="#87CEEB" colspan="3"|Dimensions
|-
|Length||46' 0"||14.02 m
|-
|Wingspan||70' 0"||21.34 m
|-
|Height||' "||m
|-
|Wing area||ft²||m²
|-
!bgcolor="#87CEEB" colspan="3"|Weights
|-
|Empty||18,400 lbs||8350 kg
|-
|Loaded||28,545lbs||12947 kg
|-
|Maximum takeoff||34,760 lbs||15,767 kg
|-
!bgcolor="#87CEEB" colspan="3"|Powerplant
|-
|Engines||colspan="2"|Pratt & Whitney R-4360 Wasp Major
|-
|Power||3350 hp||2500 kW
|-
!bgcolor="#87CEEB" colspan="3"|Performance
|-
|Maximum speed||340 mph||546 km/h
|-
|Combat range||1250 miles||2013 km
|-
|Ferry range||miles||km
|-
|Service ceiling||28,000 ft||8500 m
|-
|Rate of climb||ft/min||m/min
|-
|Wing loading||lb/ft²||kg/m²
|-
|Power/Mass||hp/lb||kW/kg
|-
!bgcolor="#87CEEB" colspan="3"|Armament
|-
|Guns||colspan="2"|2 × 20mm cannon<br>.50 cal machineguns
|-
|Bombs||8000 lbs||3639 kg
|-
|Other||colspan="2"|4 × torpedoes
|-
|}
</font>

The '''[[Douglas Aircraft Company|Douglas]] TB2D Skypirate''' (also known as the '''Devastator II''') was a [[torpedo bomber]] intended for service with the [[United States Navy]]'s [[Midway class aircraft carrier|''Midway'' class aircraft carriers]]; they were too large for earlier decks. Two prototypes were completed, but the dedicated torpedo bomber was becoming an outdated concept and with the end of [[World War II]] the type was no longer needed, so the project was cancelled.

The TB2D was powered by a [[Pratt & Whitney]] [[Pratt & Whitney Wasp Major|R-4360 Wasp Major]] driving [[contrarotating]] [[propeller]]s. Four [[torpedo]]es could be carried on underwing pylons, or an equivalent bomb load. Defensive armament consisted of two 20 mm cannon in the wings and .50 cal machineguns.

Very large for a single-engined aircraft, the TB2D would have been the largest piston-engined [[aircraft carrier|carrierborne]] plane at the time if it had been deployed. It could carry four times the weapon load of the [[TBF Avenger]] and was larger, heavier and faster than a [[B-25 Mitchell]] bomber.

{| cellpadding="2" cellspacing="0" style="margin:5px auto; border:3px solid;width:60%; font-size:small;" align="center"
!bgcolor="#e0e0e0" colspan="2" align="center" style="border-bottom:3px solid"|Related content
|-
|'''Similar Aircraft'''
|align="center"|[[TBF Avenger]]
|-
|'''Designation Series'''
|align="center"|[[TBD Devastator]] - [[TB2D Skypirate]] - [[Douglas TB3D]]
|-
|'''Related Lists'''
|align="center"|[[List of military aircraft of the United States]]
|-
|}

{| cellpadding="2" cellspacing="0" style="margin:5px auto; border: 3px solid; font-size:72%; font-family:Arial,Helvetica" align="center"
|- bgcolor="#efefef"
| [[List of aircraft]] - [[List of aircraft manufacturers|Aircraft manufacturers]] - [[List of aircraft engines|Aircraft engines]] - [[List of aircraft engine manufacturers|Aircraft engine manufacturers]] - [[list of years in aviation| Years in Aviation]]
|-
|}