Pedestrian_A

又没礼貌了~~~
xinxian 發表於 2016-6-30 09:38 AM

算了~~不和你辩~~~

Pedestrian_A

我地一个月每人只可以用一卷厕纸
lhy92725 發表於 2016-6-30 01:00 PM

算了~~不和你辩~~~

Pedestrian_A

刚刚...心爸爸发生交通意外....吓死心弦了....

还好人没事....车就....
xinxian 發表於 2016-6-30 04:36 PM

心爸没事心弦不用擔心
monitor for any neck or back pain in the next two days.  your dad might need a bit of time until he realized any pain.  
time for a new car

Pedestrian_A

心爸爸的车...
xinxian 發表於 2016-7-1 09:25 AM

how did that happened?
心爸不要買SUV!  Law of physics!  High center gravity=less responsive!

Pedestrian_A

不懂~~~
xinxian 發表於 2016-7-1 03:07 PM

SUV=越野車
SUV=高重心 high center of gravity
高重心=車在緊急情況不能控制 *i don't know how to say that in chinese.  i still think less responsive is a better term for this description!
Lexus RX=transverse mounted engine.  front left driveshaft is shorter than the front right driveshaft and with open differential awd means the front left wheel will always getting more power than the other wheels.  that's why i don't even buy any transverse mounted engine cars.
That's why Mercedes Benz ML, BMW X5, Audi Q5 and other proper engineered SUV have longitudinal mounted engine for equal power sending to the wheels even without limited slip differential!

Pedestrian_A

啊甲吃太多番茄了~~~


只会说“番话”~~~
xinxian 發表於 2016-7-2 10:19 AM

你真以為我可以打中國字?
只是警告你爸下次不要買suv

Pedestrian_A

其实SUV都唔系甘差嘅遮，意外嘅野无人想架
lhy92725 發表於 2016-7-2 05:51 PM

已經解釋...
SUV=意外車無法控制
正常的汽車=better control in different condition.

again, nothing bet the law of physics.  only dumb people don't understand that.

Pedestrian_A

有D甘嘅事嗎？
lhy92725 發表於 2016-7-3 09:36 AM

不知道如何解釋

Recovery is Very Difficult, even for a Professional DriverOnce a rolling action has begun, everything gets a lot worse, very fast.This drawing shows the situation once a vehicle has tilted only10 degrees sideways.  With some soft vehicle suspensions, and under-inflatedtires, this much of a (body roll)tilt is nearly possible while all the wheels are still on the pavement.Let's look at how the forces we have been discussing change.
To start with, this doesn't look all that different.

But compare thisdrawing with the similar ones above.You can see that the center-of-gravity has gotten a little higher.At a 10° tilt, it is actually raised up by 5.2".And if the tire's low pressure allows it to deform horizontally,then it is less far horizontally from the tire footprint.  We willestimate 2".  These two effects combine in making that importantθ angle bigger.  We would now have (vertical) 30 + 5.2 or 35.2"and (horizontally) 30 - 2 or 28".  The tangent is now 35.2/28,or 1.257.  Our 3400 pound horizontal centripetal force then wouldhave the effect of 3400 * 1.257 or 4274 pounds of vertical lift!
The (initial) 3400 pound lifting/rolling effect has already gotten FARgreater, above 4200 pounds already.  Even worse, there is now no realisticchance of recovery.  Where the problem began with a lifting force just alittle more than the vehicle weight, as soon as the vehicle starts tilting,the geometry gets catastrophically worse.  An experienced driver would tendto immediately try to straighten the wheels out.  In many vehicles, and ifthe driver reacted fast enough, this can resolve the rollover situationsafely.  However, the driver had had to steer the vehicle towarda direction that might not be safe or acceptable!  He might even thenhave to again make a fast steering change to cause a second startof a rollover.  But in tall vehicles such as SUVs, there is a commontendency for a driver to rock the vehicle back the other way (inertia,momentum, etc) (again depending on what obstacles are nearby) and theaction of trying to recover tends to cause even faster steeringactions and therefore can cause theSUV to roll over to the opposite side.  So, even experienced drivershave great difficulty in recovering from incipient rolloversin tall vehicles.  Imagine a less experienced soccer mom!
FYI:  This is why test vehicles always have those "training wheels"arms on them, because once a rollover begins, it gets so much worseso fast that even professional drivers have great difficulty inrecovering.
(Once a rollover has begun, the geometry actually gets even morecomplicated, but always WORSE, involvingthe dynamic rotational inertia of the vehicle and the fact that theeffective weight of the vehicle becomes less (even zero as it crossesabove the tire tread), but this last calculationessentially shows how the problem gets far worse as the rolloverproceeds.  These complicating effects all act to make the rollovereffect even worse.  All of the earlier "level vehicle"calculations were exactly correct.  They represent the mostgenerous analysis regarding stability.)

Pedestrian_A

會唔會系某D牌子的設計問題
lhy92725 發表於 2016-7-3 04:05 PM

lazy cat didn't read or do her own research...

Pedestrian_A

这种叫suv哦~~


心弦也是比较喜欢高的车~~~
xinxian 發表於 2016-7-4 09:40 AM

again... nothing can beat the law of physics...
you better find a better control car so you can be safer...

Pedestrian_A

又讲番文~~~


猫猫看得懂？？
xinxian 發表於 2016-7-4 09:42 AM

because i can only explain this in english...  you really think i can type that much chinese?

Pedestrian_A

唔懂，不过睇得懂张图，大概应该系呢类车容易翻侧吧
lhy92725 發表於 2016-7-4 01:34 PM

高重心

Pedestrian_A

但7人车我觉得好用哦，选个第D牌子啦
lhy92725 發表於 2016-7-4 02:17 PM

你需要經常攜帶7人? 我寧願買

Pedestrian_A

我的车不高....那是心爸爸的车~~~
xinxian 發表於 2016-7-4 03:54 PM

告訴你爸爸不會再買

Pedestrian_A

我....我也can't understand that much english
xinxian 發表於 2016-7-4 03:55 PM

i am trying to help