假若直路尾髮夾彎反車你會選用…(可選多項)

由於希望只集中討論彈簧, 所以請恕沒其他選項.

我1-8 揀哂喎..

2# ganboy


No problem. You have your rights.

我1-8 揀哂喎..
ganboy 發表於 2009-5-13 15:08

                               
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Any reasons?

因為反車原因有好多, 彈簧長短軟硬只係其中幾個, 再者,  彈簧過硬或過軟亦有機會做成反車。點揀?　
呢個問題根本就冇標準答案，投票結果亦不能歸立出任何結論，前提係要搵出反車0既原因。

"彈簧過硬或過軟亦有機會做成反車"
I doubt this.

我當然同意反車原因可以有許多, 但如果單純因為原因可以有許多而不去研討, 只會在車場試這個試那個而沒有任何學術作依歸, 就會花掉太多不應花的時間了.

反車根本唔關彈弓事！係 down & up stop 既事！

反車根本唔關彈弓事！係 down & up stop 既事！
邪靈 發表於 2009-5-13 21:17

                               
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Wow, what a 'clear cut' answer! Very confident.

I found this from the net which may change some of your viewpoints:

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"彈簧過硬或過軟亦有機會做成反車"
I doubt this.

billy86che 發表於 2009-5-13 20:49

                               
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than try it
given high grip front tyre, 0 droop, and same amount of spring preload, soft or hard spring which one is more likely to roll over?

Of course we have to keep all other things constant when we do any testing, but there are 2 things vitally important :
1. ride height remains the same; &
2. the body shell is not touching the ground at all times.
Or else, the problem will become so complicated that testing becomes fruitless.

glad to hear the word CONSTANT, so what is the CONSTANT?
1. ride height remains the same;  0mm?5mm?
2. the body shell is not touching the ground at all times. that mean the roll-over will never take place or you could assame when the car roll-over, it will never land.

what about toe/camber/droop/spring-rate/weight/speed/......etc.?

12# ganboy


1. I meant the ride height should be the same even after you change the springs.

2. I meant the body shell should not be an agent that stops the car from flipping over.

as for "what about toe/camber/droop/spring-rate/weight/speed/......etc.?", I guess when you change the springs, you certainly have changed the spring rate. But the rest should be kept constant to make the test fruitful.

Remain constant= same as before

so, what is that specific CONSTANT to start with?
If you taking this as an controlled experiment, you need a specific BASE to start with, and all these (toe/camber/droop/spring-rate/weight/speed/......etc.) contribute to that BASE which need to be specific. And you need to test all combination of these BASE against your assumption. And it turns out exactly what you thought. In this circumstance you can say you have a theory, say, hard spring can avoid traction roll. Or else, you are just talking about a specific case.

I don't think I am talking about a specific case. Yes, indeed I wish to find out something like "harder front springs help to stop flipping over" in general.

Do tell me if one day you make your car flip over more easily just by changing to harder front springs. I am really interested in understanding why and how that something like this would happen.

I don't think I am talking about a specific case. Yes, indeed I wish to find out something like "harder front springs help to stop flipping over" in general.
billy86che 發表於 2009-5-14 00:15

                               
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I can tell you, negative. This only works to a certain point.
Please try out all the combinations if you insist... XD

Sometimes we don't always have to try out something by ourselves. Doing a survey like this sometimes helps. We can gain knowledge from others' experience. Afterall, knowledge is collaborative.