為何P100D 0-60mph可以只用2.28秒 - 跑車

By Hedwig
at 2017-09-08T01:46
at 2017-09-08T01:46
Table of Contents
https://youtu.be/iVGsWvRa1XA
在半年多前,當MT用Model S P100D做0-60mph測試得到驚人的2.28秒成績後
Jason Fenske先生做了一則影片從物理公式來解釋為何P100D能有這樣驚人的速度
簡單解釋一下他在講什麼:(如果有聽錯的地方就請各位幫忙指正了)
一輛車想要有足夠快的加速有三個條件:
1.足夠的動力
2.四輪驅動
3.抓地力
前兩項P100D都有了,問題就在於抓地力
而0-60mph加速這件事情其實可以把它看成是60-0mph剎車減速的一個反向過程
當你在剎車的時候,為了得到最好的剎車效果必須讓輪子持續滾動避免鎖死打滑
也就是要隨時保持最好的輪胎抓地力
負責做到讓輪胎持續滾動的就是ABS機構
偵測到輪胎快要鎖死打滑時ABS就會做動放鬆剎車讓輪胎持續滾動再剎車
當你有最好(短)的60-0mph剎車距離時,這過程中你的輪胎是持續在滾動的
把這過程倒帶一下,輪胎同樣是保持著最大的抓地力
只要有足夠的動力,就可以看做是0-60mph加速的過程
所以只要知道60-0mph的剎車距離,就可以經由公式計算出60-0mph的剎車時間
這也是理論上0-60mph最快的加速時間
102ft是MT測試過最好的60-0mph剎車距離,經過簡單的計算,得到2.32秒這個數字
所以理論上2.32秒是0-60mph最好的加速成績
而為什麼MT可以測出2.28秒這個比理論值還要快的數字?
他也做出了解釋
因為P100D的輪胎是前後配的,後輪比較寬
所以當剎車時前輪的負擔比較大,但因為比較窄抓地力就會差一點
而加速時是後輪的負擔比較大,因為比較寬所以整體的抓地力就會更好一些
也就造成了會跑出2.28秒這個比60-0mph剎車時間2.32秒還要短的成績來了
而也有國外鄉民們在爭論如果把這套動力系統拿到車身比較輕的跑車上
那可以超越2.28秒嗎?
有一派說法是可以,因為車子比較輕
有一派說法是不可以,因為車子比較輕所以抓地力變小,加速也就變慢了
過程跟理由我就不講了
結論是可以的...
後面還講到了很多細節,請有興趣的人自己看了~~~
--
在半年多前,當MT用Model S P100D做0-60mph測試得到驚人的2.28秒成績後
Jason Fenske先生做了一則影片從物理公式來解釋為何P100D能有這樣驚人的速度
簡單解釋一下他在講什麼:(如果有聽錯的地方就請各位幫忙指正了)
一輛車想要有足夠快的加速有三個條件:
1.足夠的動力
2.四輪驅動
3.抓地力
前兩項P100D都有了,問題就在於抓地力
而0-60mph加速這件事情其實可以把它看成是60-0mph剎車減速的一個反向過程
當你在剎車的時候,為了得到最好的剎車效果必須讓輪子持續滾動避免鎖死打滑
也就是要隨時保持最好的輪胎抓地力
負責做到讓輪胎持續滾動的就是ABS機構
偵測到輪胎快要鎖死打滑時ABS就會做動放鬆剎車讓輪胎持續滾動再剎車
當你有最好(短)的60-0mph剎車距離時,這過程中你的輪胎是持續在滾動的
把這過程倒帶一下,輪胎同樣是保持著最大的抓地力
只要有足夠的動力,就可以看做是0-60mph加速的過程
所以只要知道60-0mph的剎車距離,就可以經由公式計算出60-0mph的剎車時間
這也是理論上0-60mph最快的加速時間
102ft是MT測試過最好的60-0mph剎車距離,經過簡單的計算,得到2.32秒這個數字
所以理論上2.32秒是0-60mph最好的加速成績
而為什麼MT可以測出2.28秒這個比理論值還要快的數字?
他也做出了解釋
因為P100D的輪胎是前後配的,後輪比較寬
所以當剎車時前輪的負擔比較大,但因為比較窄抓地力就會差一點
而加速時是後輪的負擔比較大,因為比較寬所以整體的抓地力就會更好一些
也就造成了會跑出2.28秒這個比60-0mph剎車時間2.32秒還要短的成績來了
而也有國外鄉民們在爭論如果把這套動力系統拿到車身比較輕的跑車上
那可以超越2.28秒嗎?
有一派說法是可以,因為車子比較輕
有一派說法是不可以,因為車子比較輕所以抓地力變小,加速也就變慢了
過程跟理由我就不講了
結論是可以的...
後面還講到了很多細節,請有興趣的人自己看了~~~
--
Tags:
跑車
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