淺談過彎 - 取線概論(1/3) - 機車

By Xanthe
at 2009-04-14T12:10
at 2009-04-14T12:10
Table of Contents
※ 引述《RaveMan (...)》之銘言:
: 網誌附圖清晰版 http://www.wretch.cc/blog/RaveMan/14125681
: ======================
: 對於兩輪而言
: 在公路上的合法取線(不吃對向 僅行己道)相較於四輪更為重要且容易
: 兩輪的車寬對於一般山道而言 有很大的彈性空間可以取線
: 至於最快的路線應該怎麼取? 為什麼要做"外-內-外"?
個人小意見
基本上,由兩線夾角來解釋各種路線過彎難易度就有很大的問題了
舉的最簡單的例子, _
╱ \ 照原PO的畫法這樣子就是0度了
如果原PO想將兩側線段做延長來交於一點,那更好
這樣推廣最終的結果,就是各種路徑都該由原始道路的方向做延長
也就是巨觀來說,該轉幾度是由道路決定,與取哪種路線無關
所以用夾角的方式解釋路線概念基本就有誤
要解釋為何單一彎道外內外最快,用圓周運動的概念說明就夠
車輛速度越快,同樣傾角下迴轉半徑越大
所以在同一彎道裡能容納的的最大圓弧即為外內外的線
當然在此還是要特別強調:
這只是給你個外內外的基本概念,實際上絕對不會有人完全走這個線
如果是加速爆強,轉彎超弱的車又另當別論,走外內外搞不好反而慢
因為過彎的時間至少就包含了減速、轉向、出彎加速
這三個加起來才是你花掉的時間,所以外內外只是個概念不是通則
賽道經驗小弟太少,
但是山路經驗個人大推nuf所提的取線概念
較晚進彎可以更快轉向出彎點並調整出彎路線
有閒的人還可以從高中的圓周運動公式來推導:
揪竟,定圓是"高速大圈"快,還是"低速小圈"快呢?
--
: 網誌附圖清晰版 http://www.wretch.cc/blog/RaveMan/14125681
: ======================
: 對於兩輪而言
: 在公路上的合法取線(不吃對向 僅行己道)相較於四輪更為重要且容易
: 兩輪的車寬對於一般山道而言 有很大的彈性空間可以取線
: 至於最快的路線應該怎麼取? 為什麼要做"外-內-外"?
個人小意見
基本上,由兩線夾角來解釋各種路線過彎難易度就有很大的問題了
舉的最簡單的例子, _
╱ \ 照原PO的畫法這樣子就是0度了
如果原PO想將兩側線段做延長來交於一點,那更好
這樣推廣最終的結果,就是各種路徑都該由原始道路的方向做延長
也就是巨觀來說,該轉幾度是由道路決定,與取哪種路線無關
所以用夾角的方式解釋路線概念基本就有誤
要解釋為何單一彎道外內外最快,用圓周運動的概念說明就夠
車輛速度越快,同樣傾角下迴轉半徑越大
所以在同一彎道裡能容納的的最大圓弧即為外內外的線
當然在此還是要特別強調:
這只是給你個外內外的基本概念,實際上絕對不會有人完全走這個線
如果是加速爆強,轉彎超弱的車又另當別論,走外內外搞不好反而慢
因為過彎的時間至少就包含了減速、轉向、出彎加速
這三個加起來才是你花掉的時間,所以外內外只是個概念不是通則
賽道經驗小弟太少,
但是山路經驗個人大推nuf所提的取線概念
較晚進彎可以更快轉向出彎點並調整出彎路線
有閒的人還可以從高中的圓周運動公式來推導:
揪竟,定圓是"高速大圈"快,還是"低速小圈"快呢?
--
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