水曜日 2月 01, 2012 at 16:02
B.E. Presents: Active Suspension in Formula 1
Introduced in 1987 with the Lotus 99T, Active Suspension was arguably the most significant F1 technology since the utilization of aerodynamics. A.S. was developed to its highest point in 1991 with the Williams FW14, but was banned in 1994 (along with other driver aids such as traction control and ABS) on the grounds that it made driver skill nearly irrelevant.
Quite simply, active suspension serves two purposes:
- To keep tires in their maximum contact patch with the road under all G-conditions; cornering, braking, and acceleration.
- To keep the ride height of the car constant under all G-conditions, to preserve optimum aerodynamics.
Video:
- Lotus 99T Active Susupension Demonstration
- Williams FW14B Active Suspension Demonstration
- Williams FW14B Documentary Part 1, Part 2, Part 3
Article: “The Active Cars”, covering the history and events of the active suspension time period in Forumla 1.
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火曜日 1月 31, 2012 at 16:13
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月曜日 1月 30, 2012 at 13:02
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月曜日 1月 30, 2012 at 12:56
The Porsche 911 is Beautifully Engineered
Which 911 do you think is the most beautiful? I would choose the 993.
The Porsche 911 (pronounced as Nine Eleven, German: Neunelfer) is a luxury 2-door sports coupe made by Porsche AG of Stuttgart, Germany. It has a distinctive design, rear-engined and with independent rear suspension, an evolution of the swing axle on the Porsche 356. The engine was also air-cooled until the introduction of the Type 996 in 1998. Since its introduction on September 11, 1963, it has undergone continuous development, though the basic concept has remained little changed.
Throughout its lifetime, the 911 has been modified by private teams and by the factory itself for racing, rallying and other forms of automotive competition. It is among the most successful competition cars ever. In the mid 1970s, normally aspirated 911 Carrera RSRs won major world championship sports car races such as Targa Florio, Daytona, Sebring and Nürburgring, even against prototypes. The 911-derived 935 turbo also won the coveted 24 Hours of Le Mans in 1979.
In the 1999 international poll for the award of Car of the Century, the 911 came fifth. It is one of two in the top five that had remained continuously in production (the original Beetle remained in production until 2003), and was until 1998 the most successful surviving application of the air- (now water-) cooled opposed rear-engine layout pioneered by its original ancestor, the Volkswagen Beetle. It is one of the oldest sports coupe nameplates still in production.
Video:
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月曜日 1月 30, 2012 at 12:47
“「仮想」と聞くと、かなり前のことですが、日本IBMでシステムズエンジニアをしていた方が「virtualを仮想と誤訳した責任は我々にあります」と反省の弁を述べたことを思い出します。米IBMがvirtual memoryを発表した時、日本IBMが仮想記憶と翻訳しました。virtualの意味は「事実上の」「実質的」ですから、virtual memoryとは「本来のメモリーではないが事実上メモリーとして使える技術」を指します。ところが、仮想記憶と訳したため、実体がない想像上のメモリーという印象を与えてしまい、しかもコンピュータの世界でvirtualが出て来ると必ず仮想と訳されるようになりました。同氏は「もっといい訳にしておけば」と悔やむ所以です。とはいえ今考えてみても、しっくり来る言葉はなかなか見つかりません。言葉の難しさを感じます。”
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「言葉のインフレ」は経済のそれよりはるかに恐ろしい：日経ビジネスオンライン
英辞郎を引いてみたら確かに “実体・事実ではないが「本質」を示すもの” とあるな。してみると「ヴァーチャルな社会」なんて言い方も、英語圏の人と日本人では受ける感覚が全然違うのかもしれん。
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金曜日 1月 27, 2012 at 12:18
Pleasure to have you
Starring: McLaren F1
(by Ian-Alexander)
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金曜日 1月 27, 2012 at 11:50
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金曜日 1月 27, 2012 at 10:25
True Hot Hatch.
The Renault 5 Turbo.
(source: Historique Automobile)
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木曜日 1月 26, 2012 at 12:34
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