l****z
发帖数: 29846 | 1 EPA: Gas mileage inflated on 4 Mini Cooper models
October 22, 2014 - 11:35 AM
DETROIT (AP) — The U.S. government has told BMW to reduce the gas mileage
estimates on the window stickers on four of its Mini Cooper models after an
audit found the figures were overstated.
The discrepancy, which varies from one to four miles per gallon depending on
model, was discovered in testing at the Environmental Protection Agency's
lab in Ann Arbor, Michigan, the agency said in a statement Wednesday.
The reduct... 阅读全帖 |
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l****z
发帖数: 29846 | 2 U.S. Overstates Health-Care Enrollees
Incorrect Inclusion of Dental Coverage Enrollees in Medical Insurance
Numbers
By
Louise Radnofsky
Updated Nov. 20, 2014 9:01 p.m. ET
The Obama administration said it recently overstated how many people had
paid-up health coverage through the Affordable Care Act’s insurance
exchanges because of the incorrect inclusion of dental coverage sign-ups,
marking an embarrassing disclosure as the health-care markets open for their
second year of operation.
Some 6.7 mi... 阅读全帖 |
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b*********h
发帖数: 1001 | 3 主要就是说人们在调查的时候普遍不敢说真话，必须要装B装政治正确，所以电话调查
很多人嘴上说不支持trump，但是等投票的时候反而投给了trump
文中举过以前类似的例子，这叫Bradley效应。
具体反映在，trump在网络上的支持率要高于电话调查的支持率，对3000 GOP投票者调
查显示网络上支持率能高出6%
In 1982, California voters were supposed to elect former Los Angeles Mayor
Tom Bradley as the state's next governor.
Bradley went into the election with a sizable lead over George Deukmejian.
Exit polls projected a Bradley win. But when the ballots were counted,
Deukmejian came out the winner.
Thus, the "Bradley effect" was born — named as ... 阅读全帖 |
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t*c
发帖数: 6929 | 4 这是左翼538网站第一次对主流媒体连续几天的报道的提醒，似乎是警告民主党：
1. Exit polls have a much larger intrinsic margin for error than regular
polls. This is because of what are known as cluster sampling techniques.
Exit polls are not conducted at all precincts, but only at some fraction
thereof. Although these precincts are selected at random and are supposed to
be reflective of their states as a whole, this introduces another
opportunity for error to occur (say, for instance, that a particular
precinct has been canvassed esp... 阅读全帖 |
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发帖数: 1 | 5 Trump overstates crowd size at inaugural
http://www.foxnews.com/us/2017/01/21/fact-check-trump-overstates-crowd-size-at-inaugural.html
THE FACTS: Trump is wrong. Photos of the National Mall from his inauguration
make clear that the crowd did not extend to the Washington Monument. Large
swaths of empty space are visible on the Mall.
Thin crowds and partially empty bleachers also dotted the inaugural parade
route. Hotels across the District of Columbia reported vacancies, a rarity
for an event as ... 阅读全帖 |
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D*********h
发帖数: 213 | 6 今天听到电视采访了一个川普的私交，是川普忠实的支持者。他无意中说出了一个川普
的秘密，让我对川普以前不能理解的很多做法豁然理解了。他说，川普在商业上很多时
候都是先夸大（overstate），然后再和对手谈判，达到一个平衡。这是他商业上成功
的诀窍之一。现在他把这个做法用到当总统上来了。他举了个例子，说川普称“媒体是
人民的敌人”，其实这并不是他想表达的意思，而是表示他想和媒体谈判，大家最后达
到一个双方都能接受的定位。
川普作为商人，用夸大的方法那是再自然不过了。比如他想收购一幢楼，必定把那幢楼
说的一无是处，恨不得说合理价格是负数。这样在谈判中处于有利位置，然后讨价还价
到一个对方勉强可以接受的价位。川普做了一辈子商人，这套一定玩得如火纯青。当了
总统，还是这么玩。这种说法有说服力，所以那个采访还是基本可信的。
如果那样，就能理解为什么川普会有那么多overstatement了，比如有3百万非法投票的
，奥巴马的出生证是假的，非法移民大部分是罪犯，媒体是人民的敌人，奥巴马下令监
听了他的电话等等。而每一次都掀起了世界波，但都是负面的。他的overstate谈判技
巧或许在做生意上有... 阅读全帖 |
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发帖数: 1 | 7 不要瞎解释了，去读读他的那本书art of the deal.
一个人的一生经验和思想不是你套用一个“夸大”公式就理解的。
：今天听到电视采访了一个川普的私交，是川普忠实的支持者。他无意中说出了一个川
普的秘密，让我对川普以前不能理解的很多做法豁然理解了。他说，川普在商业上很多
时候都是先夸大（overstate），然后再和对手谈判，达到一个平衡。这是他商业上成功
：的诀窍之一。现在他把这个做法用到当总统上来了。他举了个例子，说川普称“媒体
是人民的敌人”，其实这并不是他想表达的意思，而是表示他想和媒体谈判，大家最后
达到一个双方都能接受的定位。
：川普作为商人，用夸大的方法那是再自然不过了。比如他想收购一幢楼，必定把那幢
楼说的一无是处，恨不得说合理价格是负数。这样在谈判中处于有利位置，然后讨价还
价到一个对方勉强可以接受的价位。川普做了一辈子商人，这套一定玩得如火纯青。当
了总统，还是这么玩。这种说法有说服力，所以那个采访还是基本可信的。
：如果那样，就能理解为什么川普会有那么多overstatement了，比如有3百万非法投票
的，奥巴马的出生证是假的，非法移民大部分是罪犯，媒... 阅读全帖 |
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g*******x
发帖数: 2158 | 8 无语了.
看看2008版本的forester
http://www.distrocars.com/2008-subaru-forester
The Forester line features three versions of Symmetrical All-Wheel
Drive, all of which power all four wheels all the time and can transfer
more power to the wheels with the best grip. In all models equipped with
the 5-speed manual transmission, a viscous coupling locking center
differential built into the transmission case divides engine power
50:50. Wheel slippage at one set of wheels causes more power to shift to
the opposit... 阅读全帖 |
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b*********n
发帖数: 2975 | 9 since toyota bought subaru, forester slided into more rav-4 like, hehe
无语了.
看看2008版本的forester
http://www.distrocars.com/2008-subaru-forester
The Forester line features three versions of Symmetrical All-Wheel
Drive, all of which power all four wheels all the time and can transfer
more power to the wheels with the best grip. In all models equipped with
the 5-speed manual transmission, a viscous coupling locking center
differential built into the transmission case divides engine power
50:50. Wheel... 阅读全帖 |
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d***a
发帖数: 13752 | 10 Understeering时，应该把方向盘向外偏一下，让车恢复控制后再转向。原理是减小拐
弯的角度，以此来减少对traction的要求。前提是有足够向外偏移的空间。
Oversteering对老手来说确实可以对付。但oversteering的危险在于，反应慢一点，车
就会旋转起来，非常危险。RWD的车，冰雪天直道上刹车都很容易spin。 |
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v******p
发帖数: 700 | 11 turbo加速还行，要肯往红区踩。60-90的加速Kick Down很impressive，不比我G35差。
ECO模式不能开，开了就是一买菜车。
SX Turbo操控性还算好（相对family sedan来说），oversteer比较严重，30码UTurn甩
屁股＋Oversteer，traction control介入得太早。
油耗还可以，居然我的开法能有19-20mpg。
价格贵，顶配OTD要31K。 |
|
v******p
发帖数: 700 | 12 turbo加速还行，要肯往红区踩。60-90的加速Kick Down很impressive，不比我G35差。
ECO模式不能开，开了就是一买菜车。
SX Turbo操控性还算好（相对family sedan来说），oversteer比较严重，30码UTurn甩
屁股＋Oversteer，traction control介入得太早。
油耗还可以，居然我的开法能有19-20mpg。
价格贵，顶配OTD要31K。 |
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l*x
发帖数: 396 | 13 在轮胎打滑的情况下，oversteer比understeer好控制多了。一般开赛车的没几个会喜
欢understeering。车厂把量产车调到比较understeer是为了在极限下更安全.一但轮胎
打滑,FWD很难控制. RWD可以漂移过弯,也就是说可以给车手信心来push到极限.
oversteer |
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i****x
发帖数: 17565 | 14 I'm tired of arguing with one who doesn't accept basic facts. you said some
people argue without going to track but obviously you are one and btw, I do
go to track.
good rwd car does NOT oversteer in corner unless you give too much gas. If
it does, you can counter steer and ease off gas a bit to save it and
cornering becomes neutral again. when you enter a corner too fast rwd car
may understeer as well but just give it more more gas you can fix the under
steer. so for trained driver, rwd is tota... 阅读全帖 |
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h****y
发帖数: 9234 | 15 【 以下文字转载自 Auto_Fans 俱乐部 】
发信人: hueyhy (Cesc), 信区: Auto_Fans
标 题: 后驱车真是难开啊.
发信站: BBS 未名空间站 (Sun Mar 11 14:59:08 2012, 美东)
今天去autocross,结果正好赶上雨天.所以抓地特别差
第一次用mustang跑就赶上这种状况,隐约就觉得自己要悲剧.
结果果然.第一趟最后一个弯道眼看就拐到冲终点的直道了,floor早了一点点... 然后就
oversteer了,直接滑出去十几米,转了180度... 根本没有反打方向的意识当时
最后一趟想多push一点,结果又在出一个弯道的时候补油过早过猛,oversteer,反打方向
也没救回来,滑出去off course了.
相比之下以前开si的时候根本就不用考虑spin的问题.出弯的时候给点油基本不会有什么
问题..
当然后驱的好处就是不像前驱车那么容易push.
就连红灯起步的时候, 一档刚刚2000转起步屁股都会扭,吓的我赶紧抬油门.早上好几个
灯都这样了,二档的时候也不能狠给油. 回家路上就有一次二档没太在意地板油了一下,
结... 阅读全帖 |
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s*****8
发帖数: 606 | 16
The most important factors for autox are tires and driver skill. suspension
mods (sway bar, coilovers) are mainly for weight transfer and result in
understeering/oversteering, and if u you know under/oversteering caused by
tire slip-angle then it comes back to the original topic - Tire. other
suspension mods like upper control arms & tie rod are correcting tires
contact patch and bump steering, the purpose is getting more grip, so it is
still tires.
I used all season Cooper RS3 tires, Nitto NT5... 阅读全帖 |
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g********d
发帖数: 19244 | 17 ☆─────────────────────────────────────☆
felixcat (felixcat) 于 (Tue Jan 22 19:17:24 2013, 美东) 提到:
为了marketing和形象的考虑，一些厂家会把本质是前驱车的产品宣传和“包装”成是
后驱车或者是“给大部分人是后驱印象”的四驱车。
发动机纵置，并不表明它是后驱车；
四驱车里面，后轮得到一半或者比一半还要多的动力，也并不表明它是后驱车；
前驱车的一个本质是：发动机100%或者几乎是100%处于前轮轴的前方。此法则对于很多
消费者来讲不容易操作：稍微高档点的车子，发动机舱都塞得满满的，发动机上面还罩
着很多外围零件和盖子，这样真的很难看出发动机本身的具体位置，还有前轮轴的确切
位置。比方说Audi的所有车子，除了R8之外，从4缸一直到12缸发动机，全部车子都是
发动机100%处于前轮轴前方的，相信很多人从外表上根本想象不到。
这里再提供另一个容易操作的识别方法：看前轮间距（Track Width, Front）和后轮间
距（Track Width, Rear）。
后驱布局的车子，除非是... 阅读全帖 |
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l**********i
发帖数: 11748 | 18 左脚刹
One common race situation that requires left-foot braking is when a racer is
cornering under power. If the driver doesn't want to lift off the throttle,
potentially causing trailing-throttle oversteer, left-foot braking can
induce a mild oversteer situation, and help the car "tuck", or turn-in
better. Mild left-foot braking can also help reduce understeer. |
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i****x
发帖数: 17565 | 19 racy定义不了，是感觉。比如s2k的方向盘如果突然转一丁点，车身瞬间也平移一丁点
，没有延迟，也没有惯性忽悠一下那样，很sharp，很“紧”。还有过弯中的侧倾极小
。还有neutral的手感。一般的车，包括miata，方向盘突然转一丁点，身体啥都感觉不
到，过了一瞬间后才车身慢慢跟过去。我开过bmw335 m sport，也有s2k那样sharp的手
感，普通mini都差一点。
所谓neutral是指车understeer和oversteer的倾向。miata和市面上绝大多数车一样，
如果过弯速度太快是前轮先打滑。s2k非常neutral是指过弯时如果打滑是前后轮几乎一
起打滑从而不影响转动角度，能最大限度地高速过弯，但是留给失控救回的空间最小。
brz也是著名的neutral调教，frs几乎是偏向oversteer的调教了。
cappuccino是日本轻量车kei car，跟miata无关，比它还小还轻马力还弱，只在日本卖
。600毫升排量，63马力，700公斤重量。头d属于影视作品，请勿太当真，真想知道山
路飙车的精髓，youtube 搜索 best motoring inter... 阅读全帖 |
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f****a
发帖数: 4708 | 20 谁说这个时候MDX是前驱？oversteer是后驱的特征。mdx在转弯的时候会把70%的扭矩分
配到最外的后轮，前轮分别得到15%的扭矩，而内侧的后轮没有torque。在traction好
的情况下，用外侧后轮顶着过弯很爽。不好的情况下，就会oversteer。
看来mdx的torque vectoring应付不了湿滑路面。 |
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q**j
发帖数: 10612 | 21 如果你没有加速就是90%力气在前轴。fedora说这种情况不会oversteer。他这个说法不
一定对。如果后轮打滑，不能拐弯，就会匀速直线运动。可是这个时候车头还会拐弯。
所以oversteer。这种情况就算是torsen也是一个下场。 |
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p******r
发帖数: 1279 | 22 德车，日车，法拉利，且不说马力的比较，就同等马力的车来讲，什么车才算操控好？
一辆操控好的车，最主要的要素就是要predictable，也就是可预见性。好的车在车尾
后轮临界打滑的时候或者前轮推头的时候，会给车手足够的信息反馈，这个反馈是通过
多种形式表现的，比如方向盘的反馈，车体震动的反馈，车辆横向G力的反馈。 车什么
时候understeer？什么时候oversteer？避震弹簧和前后轮的damper对understeer和
oversteer有什么影响？什么叫重心转移？什么叫engine braking？engine braking会
不会导致车辆失控？ 这些东西都不懂就过来谈论尼玛车辆操控，是用屁股在谈论吗？
什么日车操控完全比不上宝马，真正懂操控的人能说这样的话吗？不被内行笑掉大牙才
怪。。。 |
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Y****a
发帖数: 17170 | 23
你的感觉是对的。
AWD的车好像天然的就会更倾向于understeering。
Subaru几乎所有的车都是如此，尤其是给老人妇女开的车型，嘿嘿。
你说audi也如此，我一点都不觉得奇怪。
所以在subaru的社区，大家推荐做的第一项mod，就是加粗RSB，效果非常明显，
不仅可以修正这个问题，而且还可以增加稳定度。
但是厂商很少会去修正这个，为什么呢？
我想是因为understeering 比oversteering安全，你最多就是多打打方向，
但是oversteering一不小心就会引起各种失控。
我觉得forester 2.5的悬挂的绝对综合硬度和impreza差不多，parts都恨不得是通用的。
但是因为重心高，这个就显的感觉软了些。
上一代的forester确实是太灵活了，我自己也很受不了，
不过我也没有怎么大开14+的2.5i，所以也不好下结论。
颠于不颠，完全就看个人的反应了。
要是换我，我肯定不觉得颠，因为14FXT就已经比较硬了，现在又被我加固了一轮了。
嘿嘿 |
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l****z
发帖数: 29846 | 24 【 以下文字转载自 USANews 讨论区 】
发信人: lczlcz (lcz), 信区: USANews
标 题: Mini Cooper的MPG被发现虚增
发信站: BBS 未名空间站 (Wed Oct 22 13:43:40 2014, 美东)
EPA: Gas mileage inflated on 4 Mini Cooper models
October 22, 2014 - 11:35 AM
DETROIT (AP) — The U.S. government has told BMW to reduce the gas mileage
estimates on the window stickers on four of its Mini Cooper models after an
audit found the figures were overstated.
The discrepancy, which varies from one to four miles per gallon depending on
model, was discovered in t... 阅读全帖 |
|
W***n
发帖数: 11530 | 25 Hyundai, Kia Pay Fine, Lose Credits Over Mileage Claims
By Jeff Plungis Nov 3, 2014 12:02 PM CT
Hyundai Motor Co. (005380) and Kia Motors Corp. (000270), whose U.S. growth
has been aided by 40-mile-per gallon claims for its cars, will pay the
equivalent of $350 million to settle claims that it overstated fuel economy
on the window stickers consumers see at dealer showrooms.
The Seoul-based affiliates, which share engines, model platforms and a
chairman, will pay a $100 million fine, forfeit $200... 阅读全帖 |
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E*********o
发帖数: 5965 | 26 Not on Quattro.
RWD只会把oversteering进一步放大，而4Matic和xDrive对traction的distribution和
delivery远不如Quattro，或者这样理解，RWD的理论优势在实际操作里很容易变成
oversteering并且缺乏四轮驱动的稳定和traction，所以永远不能把车push到极限
而Quattro带来的稳定和平衡可以让你很有信心和相对容易地把车push到极限 |
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l*x
发帖数: 396 | 27 我今年在雪地上试过家里15版CRV的四驱过弯稳定性，过弯先understeer，然后
oversteer，极不稳定。不得不说和以前开过的jeep低端车型compass的四驱相比很烂。
jeep过弯可以保持很稳定又轻微的oversteer，非常可控。此处不评价SH-AWD。 |
|
g*******d
发帖数: 73 | 28 不是很懂oversteering，应该不是oversteering的意思。
总的来说感觉车很轻、不稳、飘 |
|
t******7
发帖数: 238 | 29 我感觉是你自己的原因
似乎你过弯一直是oversteer一点然后修正，持续进行。
路况好自然可以，雨雪湿滑，就容易出事了，特别是加速。
速度不是最关键的，关键是角度
然后如果是后驱，底盘高，皮卡，都是弱项，减分。
当然主要因素是你总是oversteer然后回轮微调，或者你四轮定位不正。 |
|
o*******n
发帖数: 2035 | 30 Treasury Five-Year Yield Falls to Record as Fed Targets Midterm Securities
bloomberg
Wes Goodman, On Thursday November 4, 2010, 2:56 am EDT
Treasuries rose, pushing five-year yields to a record low, after the Federal
Reserve said it will focus its asset purchases on medium-maturity debt as
it tries to spur the economy.
Thirty-year bonds declined for a second day on speculation the U.S. central
bank’s plan to pump $600 billion into the economy by buying Treasuries will
cause inflation to accele... 阅读全帖 |
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p*****e
发帖数: 7299 | 31 Report: Housing market in West nears double-dip
TRUCKEE
April 7, 2011 5:06am
Comment Print Email Digg Newsvine
• Prices dropped 4.3 percent in Q1
• ‘Widespread fear of a collective fall in market prices is
overstated’
Home prices in the just-concluded first quarter fell nationwide, but homes
in the West had a near double-dip, according to a report Thursday from Clear
Capital Inc. of Truckee.
Nationally, prices fell 1.3 percent but in the West plummeted 4.3 percent
from a year earli... 阅读全帖 |
|
E***r
发帖数: 1037 | 32
的，
"隐含波动率是通过历史数据算出来的"
No. Implied volatility (IV) is market's currently perceived volatility (
that is, the current perception of the annualized standard deviation of
price movement on the maturity date) implied by options prices. It is
directly computed from options prices.
Realized volatility (RV), or Historical volatility (HV), however, is
computed from historical underlying price movement. It is not tied to
options pricing; it is a property of underlying price movement.
IV may overstate ... 阅读全帖 |
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l*****e
发帖数: 238 | 33 kovalainen和montoya还是不一样
montoya走线就是那样 比较激进 容易出错
不过kovalainen就是自己犯错 没有控住车
我也不相信renault的车会有那么强烈的oversteering
就算有一点oversteering开几圈也就改习惯了
一而再的割草只能说技术还不行
如果开的不是renault的车而是一辆小车队的车说不定就退赛了
道好 |
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s*****2
发帖数: 472 | 34 this is overstating. I would say Vail is just another Northstar, larger but
similarly uniform. Snow condition might be the best when you were there due
to the cold weather and snow fall.
Saying Mammoth vastly inferior is at best called overstating... |
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n*********m
发帖数: 38 | 35 Doubts about Johns Hopkins research have gone unanswered, scientist says
By Peter Whoriskey, Published: March 11
The numbers didn’t add up.
Over and over, Daniel Yuan, a medical doctor and statistician, couldn’t
understand the results coming out of the lab, a prestigious facility at
Johns Hopkins Medical School funded by millions from the National Institutes
of Health.
He raised questions with the lab’s director. He reran the calculations on
his own. He looked askance at the articles arising fro... 阅读全帖 |
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a**i
发帖数: 608 | 36 应该是大 FUND 里 2011 ytd performance 倒数第一。
旗下几个FUND 都跌很多，唯一的亮点 gold fund 最近也遭重创。
所以这行当就是3年河东，3年河西。
Paulson's Advantage Plus Loses 46% in 2011 Through November
Kelly Bit, ©2011 Bloomberg News
Dec. 5 (Bloomberg) -- John Paulson, the billionaire money manager having his
worst year, has lost 46 percent in 2011 through November in one of his
largest hedge funds, according to an investor update obtained by Bloomberg
News.
Paulson's Advantage Plus Fund, which seeks to profit from corporate events
such... 阅读全帖 |
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k*****a
发帖数: 823 | 37 从saab aero academy回来有一周了，比较忙，现在才有点时间总结一下，大家凑合着
看吧。
saab aero academy's program:
Classes: weight transfer, friction circle, understeer/oversteer, braking,
slalom, cornering, safe driving
Skid pad: wet surface, correct understeer and oversteer (created with hand
brake)
Maximum braking: apply max brake pressure instantly and let ABS kick in
Brake while turning: turning with ABS
Emergency lane change: 2nd gear full throttle start, change to the green
light lane, then full brake.
Slalom
Autocross: dr |
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m**********1
发帖数: 43 | 38 The following techniques are all based on FR/MR/RR cars, no FF cars (
actually they are just transportation tools, not cars).
In respond to your ?’s
Most of the cars are tuned to be biased to understeer for safety reasons. As
for normal drivers, understeer is easy to correct (just brake a little bit)
, and such compensation is human nature. However, oversteer is mostly seen
on high performance cars (explained later). People talking ‘understeer
scares passenger and oversteer scares driver’.
It is |
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m**********1
发帖数: 43 | 39 several elements to have for a throttle off oversteer on a 50:50 car
1. push it very very hard before engaging apex
2. must stay on the traction edge
3. brake very very hard, and transfer a lot of weight to the front
4. slightly couter steering
but i still dont understand why you want such oversteer desperately? thats
something i would like to avoid in a real racing |
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c*********r
发帖数: 19468 | 40 without acceleration, u can definitely make a car having any kind of
tendency, over, neutral, or under, no matter what layout it has
the real issue here is dynamic: with power on/off, braking...
the acceleration (including negative one when you brake) can change the
balance dramatically.
whatever you do with an fwd, u can only introduce it power-off oversteering
but power-on oversteering? never
fwd & rwd have totally different dynamics
this is physics
so, when people compare fwd with rwd/awd, it |
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W*******d
发帖数: 446 | 41 You can't assume it will understeer just because it's FWD.
BMW 3 is set to understeer from manufacturer as well as most stock RWD cars
because it's safer than oversteer.
In fact, my GTI is very neutral with minimum body roll. All I did is a
larger RSB(24mm vs 22mm stock) and Bilstein damper since the stock on is
underdamped.
If I put the RSB at full stiff, it will oversteer first rather than
understeer if I am not careful. |
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c*********r
发帖数: 19468 | 42 两回事
你可以说所有的市售车都under，赛车往往是over
但是如果你看下power on的动态
市售的RWD加power也是减小under倾向或者增加over倾向，注意这个变化方向
同样，即便FWD赛车，加power也是减小over倾向或者增加under倾向，再次注意方向
所以，无论你什么FWD，你可以over，但是不可能有power-on oversteering效果
只能有power-off oversteering，这是物理学
cars |
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c*********r
发帖数: 19468 | 43 不光是重量分布的问题，主要是FWD加大油门的时候无论如何平衡都要向under方向移动
就算总体上还是over也是比原来over得小
所以你只能调出power off oversteer，而不可能有RWD式的power on oversteer |
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i****x
发帖数: 17565 | 44 forza4里的车总体来讲太滑了。f3里的车半抓地做的不好，一直不打滑，然后要是打滑
就飞出去了。forza4作了改进，结果车变得太滑了。
GT5里s2k算比较滑的车，但还好控制。你去试一下C63 AMG和SLS就知道啥叫tail happy
了。差不多的马力，M3就比C63好操作得多。GT的确是神作，能够在虚拟的游戏里如此
逼真地体现车的个性。
现实中的s2k是比较容易oversteer的车。作为纯种跑车，它不像一般fr车那样为了安全调成稍微有点understeer，而是做
成转弯非常sharp neutral，弯中乱搞马上oversteer的风格。据说s2k过弯要信任悬挂，不要去松油、猛踩油门、反打等
等，否则很容易upset chassis |
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h****y
发帖数: 9234 | 45 今天去autocross,结果正好赶上雨天.所以抓地特别差
第一次用mustang跑就赶上这种状况,隐约就觉得自己要悲剧.
结果果然.第一趟最后一个弯道眼看就拐到冲终点的直道了,floor早了一点点... 然后就
oversteer了,直接滑出去十几米,转了180度... 根本没有反打方向的意识当时
最后一趟想多push一点,结果又在出一个弯道的时候补油过早过猛,oversteer,反打方向
也没救回来,滑出去off course了.
相比之下以前开si的时候根本就不用考虑spin的问题.出弯的时候给点油基本不会有什么
问题..
当然后驱的好处就是不像前驱车那么容易push.
就连红灯起步的时候, 一档刚刚2000转起步屁股都会扭,吓的我赶紧抬油门.早上好几个
灯都这样了,二档的时候也不能狠给油. 回家路上就有一次二档没太在意地板油了一下,
结果车子马上往边上滑,边上正好有个车过去..
这还只是根本谈不上大马力的V6啊. 一到雨天简直就是悲剧,只能小心翼翼地开么.. |
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h****y
发帖数: 9234 | 46 you need to be slow to be fast
过弯的时候,如果之前的直道刹车没刹足,速度过快,则根本无法hit apex, 而且轮胎抓地
力一直非常地勉强, 根本不敢在弯中轻举妄动(打方向,踩油, etc), 只能等车settle了
之后才敢加速,基本在弯中间是非常地慢,出弯之后也很慢. 而且因为一直感觉的到轮胎
缺grip,非常地不踏实,感觉像在冰面行走一样.
相反明显有体会的是进弯前刹车刹的很充分的时候,在弯里面能更好地转向,以及更早地
踩油出弯. 另外因为抓地力足,心里也踏实地多,信心足很多.
之前尽管玩赛车游戏.或者autocross,但其实都没有真正有这么明显地体会.可能是因为
赛道上能一次次重复过同样的弯所以能有很强烈地对比吧.而且在更快地速度下, 任何不
好的行为都会被放大.所以格外明显.
补个视频
http://www.youtube.com/watch?feature=player_embedded&v=5y6jwW4b
另外深切地感觉到了游戏跟真实的不同.在track上面操作车非常重要地一点就是感受车
地抓地,感受轮胎的反馈,g力非常重要. 而游戏里... 阅读全帖 |
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h****y
发帖数: 9234 | 47 确实比e46沉一些,加上原厂的all season tire抓地烂成一坨, 各种侧滑.
不过明显感觉的到ATS的操控确实是好,而且非常forgiving. 发生oversteer的时候,总是
能够补救回来,而且不会那么容易fishtail.
对比以前开过的笨重的野马,真是天上地下,当时开野马,只要稍微oversteer, 反打方向
补一下,很容易就甩的不可开交彻底失控了.
而ATS虽然胎不行但是即使打滑甩尾也都是在控制中, 能通过不那么快地打方向就补救回
来.
而且确实马力比e46猛不少,虽然autox的时候能发挥出来的有限. 而且这个2.0t还是有一
些turbo lag的,这个在autocross的时候挺恶心的. 能加油的区间本来都是一小节一小节
,turbo lag刚结束,好不容易来劲了,马上又要刹车了...
最后fun run让一个牛B的哥们开了几把我的车(之前开GTR今年换了FRS的一个猛男,开GT
R的时候经常拿time of the day的那种), 开完也表示这车操控非常地赞.(当然同时也表
示胎确实不咋地. 尤其温度一高. 我fun run的时候连着跑好几趟,后面胎完... 阅读全帖 |
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c***x
发帖数: 628 | 48 What "Lockup" Really Means
by Jonathan Thayer on January 09, 2013
I receive a good number of questions regarding what "lockup" really means
and the differences in the different percentages.
I typically don't quote other sources often, but Mr. Jim El Nabli (a BMW
enthusiast) stated it better than I can. (I only edited some of the spelling
mistakes and formatted it a bit different than his original email.)
In a standard differential, if one wheel loses traction, it will get all the
power and will ... 阅读全帖 |
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V***b
发帖数: 3419 | 49 不光是加速的优势。过弯也有优势，rwd过弯oversteering是推出来的，入弯速度和出
弯油门深度都得很小心。awd不一样，awd可以更高速入弯，松油门进入oversteering（
如果需要的话），车身角度合适了就大油门把车身拉直，出弯油门深度比rwd大，时间
点更早，rwd是没可能的。我看评测新STI就是这种。 |
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i****x
发帖数: 17565 | 50 你这个原因只能解释消除understeer，无法解释oversteer。后者的真正原因是重心转
移，松油门会让重心前移增加前轮traction，同时后轮失重打滑，所以才会oversteer
。很多ff车调教，后antiroll bar超硬，重心前移后内侧后轮甚至会离地，更容易打滑
。前驱和四驱车经常利用这个原理调整操控。top gear经常说：这个puppy会撒尿
下面这个是gt5的图，不过gt的物理模拟是值得信任的。
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