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全部话题 - 话题: 2520m
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a******o
发帖数: 106
1
来自主题: shopping版 - T420S這台deal還行嗎?
呵呵 感谢GRD, 已经order了 一共 1000整
ummary
 
Quantity
Part number
Description
 
Item price
Line total
 
1
  4173CTO ThinkPad T420s - 3 Yr Standard Depot Warranty
 $1,555.00
 $928.20
 $1,555.00
 $928.20
 
 
Processor
 
Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz DDR3)
Operating system ThinkPad PC DOS License
Operating system language PC DOS 2000 License
Display type 14.0 HD+ (1600 x 900) LED Backlit Ant... 阅读全帖
S**P
发帖数: 1194
2
来自主题: shopping版 - 麻烦大家帮我看看这个T420S
最近得买一个420S,如下配置,税前993刀。这个价格在目前来讲算低的了么?谢谢
ThinkPad T420s - Express - 1 Yr Depot Topseller Warranty
Processor:
Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz DDR3)
Operating system:
Genuine Windows 7 Home Premium 64
Operating system language:
Genuine Windows 7 Home Premium 64 US English
Display type:
14.0 HD+ (1600 x 900) LED Backlit Antiglare Display, Mobile Broadband Ready
System graphics:
Intel HD Graphics 3000 with Intel Core i5-2520M Processor
Total memory:
6 GB PC3-10600 DDR3 SDRAM 1... 阅读全帖
G*D
发帖数: 2887
3
来自主题: shopping版 - Lenovo T420S只要$789.65
選用Coupon code: USX10TWXJUL28,最後價格變為789.65+Tax+free shipping。
Link:
http://shoplenovo.i2.com/SEUILibrary/controller/e/na/StdAffinit
配置:
• Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz DDR3)
• Genuine Windows 7 Home Premium 64
• 14.0 HD+ (1600 x 900) LED Backlit Antiglare Display, Mobile
Broadband Ready
• Intel HD Graphics 3000 with Intel Core i5-2520M Processor
• 4 GB DDR3 - 1333MHz (1 DIMM)
• UltraNav with TrackPoint & touchpad
• 320 GB H... 阅读全帖
z********o
发帖数: 393
4
来自主题: shopping版 - 这个x220咋样?
ThinkPad X220 - 1 Yr Depot Topseller Warranty
eCoupon之后是830刀
Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz FSB)1
Genuine Windows 7 Professional 6412
12.5" Premium HD (1366x768) LED Backlit Display, Mobile Broadband Ready, 2x
2 Antenna
Intel? HD Graphics 3000
4 GB DDR3 - 1333MHz (1 DIMM)8
Fingerprint Reader
320 GB Hard Disk Drive, 7200rpm4
ThinkPad Battery 29+ (6 cell)60
No Bluetooth
ThinkPad b/g/n10
Integrated Mobile Broadband - Upgradable65
4286 : 1 Year Depot Warranty - T... 阅读全帖
G*D
发帖数: 2887
5
来自主题: shopping版 - 值得多花快300元買T420s嗎?
考慮該省點錢買T420就好,還是應該多花點錢買T420s..
目前T420配置:($578)
T
Intel Core i5-2410M Processor (2.30GHz, 3MB L3)1
Genuine Windows 7 Home Premium 6412
14.0" HD (1366 x 768) LED Backlit Anti-Glare Display, Mobile Broadband
Ready
Intel HD Graphics 3000
4 GB DDR3 - 1333MHz (1 DIMM)8
UltraNav with TrackPoint & touchpad
320 GB Hard Disk Drive, 7200rpm4
DVD recordable multiburner5
6 cell Li-Ion Battery - 55+60
No Bluetooth
ThinkPad b/g/n10
Integrated Mobile Broadband ... 阅读全帖
G*D
发帖数: 2887
6
来自主题: shopping版 - 值得多花快300元買T420s嗎?
稍微配了一下,價格還是很貴呀,獨顯部分我好像不是很需要...
T420s - ($1027) after coupon discount

Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz DDR3)1
Genuine Windows 7 Home Premium 6412
14.0 HD+ (1600 x 900) LED Backlit Antiglare Display, Mobile Broadband Ready
NVIDIA NVS 4200M Optimus Graphics 1GB, Intel Core i5-2520M Processor
4 GB DDR3 - 1333MHz (1 DIMM)8
UltraNav with TrackPoint & touchpad
320 GB Hard Disk Drive, 7200rpm4
DVD Recordable5
6 cell Li-Ion Battery - 66+60
ThinkPad b/g/n10
Integrated Mobile Bro... 阅读全帖
h*******n
发帖数: 2052
7
另外, 从MasterCard Marketplace进去, 用American Express付, 能拿到150吗?
Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz DDR3)1
Genuine Windows 7 Home Premium 6412
14.0 HD+ (1600 x 900) LED Backlit Antiglare Display, Mobile Broadband Ready
Intel HD Graphics 3000 with Intel Core i5-2520M Processor
4 GB DDR3 - 1333MHz (1 DIMM)8
UltraNav with TrackPoint & touchpad plus Fingerprint reader
320 GB Hard Disk Drive, 7200rpm4
DVD Recordable5
6 cell Li-Ion Battery - 66+60
Bluetooth 3.0
Intel Centrino Advanced-N... 阅读全帖
n***D
发帖数: 114
8
来自主题: shopping版 - T420s 这个价钱贵么?
选的最低配置的T420s, 只升级了无限网卡加了$17刀,
Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz DDR3)
Genuine Windows 7 Home Premium 64
14.0 HD+ (1600 x 900) LED Backlit Antiglare Display, Mobile Broadband Ready
Intel HD Graphics 3000 with Intel Core i5-2520M Processor
4 GB DDR3 - 1333MHz (1 DIMM)
UltraNav with TrackPoint & touchpad
320 GB Hard Disk Drive, 7200rpm
DVD Recorder
6 cell Li-Ion Battery - 66+
Intel 6025 2x2 wireless
价格是$1010 (税后), 算上AMEX 150 credit off 999, 实际花费860,大家说是不是买
贵了?
h******7
发帖数: 219
9
ThinkPad T420s - Express - 1 Yr Depot Topseller Warranty
Edit
Estimated ship date: 9/3/11** $2,150.00
$1,291.15
$2,150.00
$1,291.15

Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz DDR3)1
Genuine Windows 7 Home Premium 6412
14.0 HD+ (1600 x 900) LED Backlit Antiglare Display, Mobile Broadband Ready

Intel HD Graphics 3000 with Intel Core i5-2520M Processor
4 GB DDR3 - 1333MHz (1 DIMM)8
UltraNav with TrackPoint & touchpad plus Fingerprint reader
128 GB Solid State Drive, Se... 阅读全帖
h*******7
发帖数: 50
10
来自主题: shopping版 - 劳动节买T420s?
想买这个配置:
Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz DDR3)1
Genuine Windows 7 Home Premium 6412
14.0 HD+ (1600 x 900) LED Backlit Antiglare Display, Mobile Broadband Ready
Intel HD Graphics 3000 with Intel Core i5-2520M Processor
4 GB DDR3 - 1333MHz (1 DIMM)8
UltraNav with TrackPoint & touchpad
320 GB Hard Disk Drive, 7200rpm4
DVD Recordable5
6 cell Li-Ion Battery - 66+60
Bluetooth 3.0
ThinkPad b/g/n10
Integrated Mobile Broadband - Upgradable65
4170: 1 Year Depot Warranty - TopSeller
税... 阅读全帖
c******l
发帖数: 453
11
来自主题: shopping版 - 这个Thinkpad T420价钱怎么样?
看了看T420s,好像就是cpu和屏好一些吧。T420s比T420主要好在什么方面呢?
另外win7 home premium和professional的系统有什么大区别吗?
多谢!
下面这个list价格是901.93,这个摄像头要另加20多刀,不像T420是摄像头不用加钱的。
System components
Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz DDR3)
Genuine Windows 7 Home Premium 64
14.0 HD+ (1600 x 900) LED Backlit Antiglare Display, Mobile Broadband Ready
Intel HD Graphics 3000 with Intel Core i5-2520M Processor
4 GB DDR3 - 1333MHz (1 DIMM)
720p HD Camera
320 GB Hard Disk Drive, 7200rpm
DVD Recordable
Express Card Slot & 4 ... 阅读全帖
s***s
发帖数: 1301
12
来自主题: shopping版 - 这个Thinkpad T420价钱怎么样?
轻便很多啊。我试了一下 $851.83按照你的配置。
windows不用升级了,自己用网上的oem盘可以升级到 ultimate
Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz DDR3)1
Genuine Windows 7 Home Premium 6412
14.0 HD+ (1600 x 900) LED Backlit Antiglare Display, Mobile
Broadband Ready
Intel HD Graphics 3000 with Intel Core i5-2520M Processor
4 GB DDR3 - 1333MHz (1 DIMM)8
UltraNav with TrackPoint & touchpad
320 GB Hard Disk Drive, 7200rpm4
DVD Recordable5
6 cell Li-Ion Battery - ... 阅读全帖
R****M
发帖数: 41
13
来自主题: shopping版 - 请大家看看这台T420s的价钱如何
我不是很懂电脑,请大家帮我看看

Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz DDR3)1
Genuine Windows 7 Home Premium 6412
14.0 HD+ (1600 x 900) LED Backlit Antiglare Display, Mobile Broadband
Ready
Intel HD Graphics 3000 with Intel Core i5-2520M Processor
4 GB DDR3 - 1333MHz (1 DIMM)8
UltraNav with TrackPoint & touchpad
320 GB Hard Disk Drive, 7200rpm4
DVD Recordable5
6 cell Li-Ion Battery - 66+60
Bluetooth 3.0
ThinkPad b/g/n10
Integrated Mobil... 阅读全帖
t********8
发帖数: 680
14
Intel Core i5-2520M Processor (2.50GHz, 3MB L3)
Genuine Windows 7 Home Premium 64
15.6" HD+ (1600 x 900) LED Backlit Anti-Glare Display, Mobile Broadband
Ready
Intel HD Graphics 3000
4 GB DDR3 - 1333MHz (1 DIMM)
UltraNav with TrackPoint & touchpad
320 GB Hard Disk Drive, 5400rpm
DVD recordable multiburner
6 cell Li-Ion Battery - 55+
No Bluetooth
ThinkPad b/g/n
Integrated Mobile Broadband - Upgradable
4239 : 1 Year Depot Warranty - TopSeller

Processor Intel Core i5-2520M Proce... 阅读全帖
t********8
发帖数: 680
15
ThinkPad T520 - 1 Yr Depot Topseller Warranty
Intel Core i5-2520M Processor (2.50GHz, 3MB L3)
Genuine Windows 7 Home Premium 64
15.6" HD+ (1600 x 900) LED Backlit Anti-Glare Display, Mobile Broadband
Ready
Intel HD Graphics 3000
4 GB DDR3 - 1333MHz (1 DIMM)
UltraNav with TrackPoint & touchpad
500 GB Hard Disk Drive, 7200rpm
DVD recordable multiburner
6 cell Li-Ion Battery - 55+
No Bluetooth
ThinkPad b/g/n
Integrated Mobile Broadband - Upgradable
4239 : 1 Year Depot Warranty - TopSe... 阅读全帖
t********8
发帖数: 680
16
Intel Core i5-2520M Processor (2.50GHz, 3MB L3)
Genuine Windows 7 Home Premium 64
15.6" HD+ (1600 x 900) LED Backlit Anti-Glare Display, Mobile Broadband
Ready
Intel HD Graphics 3000
4 GB DDR3 - 1333MHz (1 DIMM)
UltraNav with TrackPoint & touchpad
320 GB Hard Disk Drive, 5400rpm
DVD recordable multiburner
6 cell Li-Ion Battery - 55+
No Bluetooth
ThinkPad b/g/n
Integrated Mobile Broadband - Upgradable
4239 : 1 Year Depot Warranty - TopSeller

Processor Intel Core i5-2520M Proce... 阅读全帖
t********8
发帖数: 680
17
ThinkPad T520 - 1 Yr Depot Topseller Warranty
Intel Core i5-2520M Processor (2.50GHz, 3MB L3)
Genuine Windows 7 Home Premium 64
15.6" HD+ (1600 x 900) LED Backlit Anti-Glare Display, Mobile Broadband
Ready
Intel HD Graphics 3000
4 GB DDR3 - 1333MHz (1 DIMM)
UltraNav with TrackPoint & touchpad
500 GB Hard Disk Drive, 7200rpm
DVD recordable multiburner
6 cell Li-Ion Battery - 55+
No Bluetooth
ThinkPad b/g/n
Integrated Mobile Broadband - Upgradable
4239 : 1 Year Depot Warranty - TopSe... 阅读全帖
C*****n
发帖数: 1049
18
来自主题: shopping版 - 有比这个更便宜的T420s吗?
想入全新(Brand new)thinkpad T420s,在相似配置的情况下(或更高)能买到比这个链接更便宜的T420s吗?
Brand New Lenovo Thinkpad T420s i5-2540M 3.3GHz 128GB SSD Bluetooth 720pWebCam $1020.00
http://www.ebay.com/itm/Brand-New-Lenovo-Thinkpad-T420s-i5-2540
再花$18.58把T420s的光驱换成1T硬盘(另买),存储空间就足矣:
New 2nd HDD SATA Hard Drive Disk Caddy Bay For IBM LENOVO Thinkpad T420s
http://www.ebay.com/itm/New-2nd-HDD-SATA-Hard-Drive-Disk-Caddy-
还可以花$6.99把换下来的光驱转成usb外置光驱,这样子还能废物利用:
http://www.ebay.com/itm/USB-2-0-IDE-SATA-S-ATA-2-5-3-5-HD-HDD-A
看过本版的Thin... 阅读全帖
b**l
发帖数: 33123
19
来自主题: shopping版 - 这个T420价钱如何?
【 以下文字转载自 Hardware 讨论区 】
发信人: baal (白日梦), 信区: Hardware
标 题: 这个T420价钱如何?
发信站: BBS 未名空间站 (Tue Mar 6 20:57:24 2012, 美东)
在线等,谢谢。
ThinkPad T420 - 1 Yr Depot Topseller Warranty
3/15/2012 $1,570.00
$719.10
$1,570.00
$719.10

Intel Core i5-2520M Processor (3M Cache, 2.50 GHz)
Genuine Windows 7 Home Premium 64
14.0 HD+ (1600 x 900) LED Backlit Anti-Glare Display, Mobile Broadband
Ready
Intel HD Graphics 3000
4 GB DDR3 - 1333MHz (1 DIMM)
UltraNav with TrackPoint & touchpad plus Fingerprint r... 阅读全帖
d*l
发帖数: 1810
20
来自主题: shopping版 - 同样的配置T420比T520贵,为啥?
ThinkPad T420 - 1 Yr Depot Topseller Warranty
Intel Core i5-2520M Processor (3M Cache, 2.50GHz)
Genuine Windows 7 Home Premium (64 bit)
14.0" HD+ (1600 x 900) LED Backlit AntiGlare Display, Mobile Broadband Ready
NVIDIA Quadro NVS4200M Optimus technology (1GB)
6 GB PC3-10600 DDR3 SDRAM 1333MHz SODIMM Memory (2 DIMM)
UltraNav (TrackPoint and TouchPad) without Fingerprint Reader
320GB Hard Disk Drive, 7200rpm
DVD Recordable
6 Cell 2.6Ah Li-Ion BatteryNone
ThinkPad 1x1 b/g/n
Mobile Broadband ready ... 阅读全帖
P*******9
发帖数: 9700
21
下单了,多谢

升级IPS不要钱 web special的X220 i5-2520M(免费升级了FPR、CAM、Win7Pro)
最后, i5-2520M FPR、CAM、Win7Pro、IPS价格是$719, 【HOT!】
如果进一步升级到i7-2640M,价格将是空前的$856! 【HOT!】
link:
http://www.marketplace.mastercard.com/coupons/lenovo/2x-points-
这是我看到的最好的X220 deal了。
s*********g
发帖数: 3305
22
那个ecoupon为什么我用不了,求助呀!

升级IPS不要钱 web special的X220 i5-2520M(免费升级了FPR、CAM、Win7Pro)最后,
i5-2520M FPR、CAM、Win7Pro、IPS........
★ Sent from iPhone App: iReader Mitbbs 7.56 - iPad Lite
h*******n
发帖数: 2052
23
【 以下文字转载自 shopping 讨论区 】
发信人: honestman (snail), 信区: shopping
标 题: 请问T420s这个价怎么样, 如果可以, 马上就下单了, 谢谢!
发信站: BBS 未名空间站 (Sat Aug 13 18:34:42 2011, 美东)
另外, 从MasterCard Marketplace进去, 用American Express付, 能拿到150吗?
Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz DDR3)1
Genuine Windows 7 Home Premium 6412
14.0 HD+ (1600 x 900) LED Backlit Antiglare Display, Mobile Broadband Ready
Intel HD Graphics 3000 with Intel Core i5-2520M Processor
4 GB DDR3 - 1333MHz (1 DIMM)8
UltraNav with TrackPoint & touc... 阅读全帖
C*********g
发帖数: 918
24
升级IPS不要钱 web special的X220 i5-2520M(免费升级了FPR、CAM、Win7Pro)
最后, i5-2520M FPR、CAM、Win7Pro、IPS价格是$719, 【HOT!】
如果进一步升级到i7-2640M,价格将是空前的$856! 【HOT!】
link:
http://www.marketplace.mastercard.com/coupons/lenovo/2x-points-
这是目前我看到的最好的X220 deal了。
a*****e
发帖数: 223
25
来自主题: Hardware版 - Is this a good deal for Lenovo T420s?
Thanks for your comments.
Total $1329
System components
Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz DDR3)
Genuine Windows 7 Professional 64
Microsoft Windows 7 XP Mode - English
14.0 HD+ (1600 x 900) LED Backlit Antiglare Display, Mobile Broadband Ready
Intel HD Graphics 3000 with Intel Core i5-2520M Processor
4 GB PC3-10600 DDR3 SDRAM 1333MHz SODIMM Memory (2 DIMM)
250 GB Hard Disk Drive, 5400rpm
DVD Recordable
Express Card Slot & 4 in 1 Card Reader
6 cell Li-Ion Battery - 66+
Countr... 阅读全帖
d*****e
发帖数: 515
26
来自主题: Hardware版 - x220t 最低价 $822.07
http://slickdeals.net/forums/showthread.php?p=44303198#post4430
Lenovo Thinkpad X220T Multitouch Tablet $881.94 (free shipping) (+
2xWOWPoints) - Core i5-2520M, 4 GB DDR3, 320 GB Hard Drive 7200rpm
Go to Mastercard market [mastercard.com],
Click "Shop now", if do not see it, search for "Lenovo",
Go to Lenovo site and find "X220T", use code "USXNOVSAVINGS2011" at checkout,
Intel Core i5-2520M Processor (2.5GHz, 3MB L3)1
Genuine Windows 7 Home Premium 6412
12.5" Multitouch HD (1366x768) LED Backli... 阅读全帖
d*****e
发帖数: 515
27
来自主题: Hardware版 - x220t 最低价 $822.07
http://slickdeals.net/forums/showthread.php?p=44303198#post4430
Lenovo Thinkpad X220T Multitouch Tablet $881.94 (free shipping) (+
2xWOWPoints) - Core i5-2520M, 4 GB DDR3, 320 GB Hard Drive 7200rpm
Go to Mastercard market [mastercard.com],
Click "Shop now", if do not see it, search for "Lenovo",
Go to Lenovo site and find "X220T", use code "USXNOVSAVINGS2011" at checkout,
Intel Core i5-2520M Processor (2.5GHz, 3MB L3)1
Genuine Windows 7 Home Premium 6412
12.5" Multitouch HD (1366x768) LED Backli... 阅读全帖
b**l
发帖数: 33123
28
来自主题: Hardware版 - 这个T420价钱如何?
在线等,谢谢。
ThinkPad T420 - 1 Yr Depot Topseller Warranty
3/15/2012 $1,570.00
$719.10
$1,570.00
$719.10

Intel Core i5-2520M Processor (3M Cache, 2.50 GHz)
Genuine Windows 7 Home Premium 64
14.0 HD+ (1600 x 900) LED Backlit Anti-Glare Display, Mobile Broadband
Ready
Intel HD Graphics 3000
4 GB DDR3 - 1333MHz (1 DIMM)
UltraNav with TrackPoint & touchpad plus Fingerprint reader
500 GB Hard Disk Drive, 5400rpm
DVD recordable multiburner
6 cell Li-Ion Battery - 55+
Bluetooth 3.0
ThinkPa... 阅读全帖
b**l
发帖数: 33123
29
来自主题: Hardware版 - 这个T420价钱如何?
在线等,谢谢。
ThinkPad T420 - 1 Yr Depot Topseller Warranty
3/15/2012 $1,570.00
$719.10
$1,570.00
$719.10

Intel Core i5-2520M Processor (3M Cache, 2.50 GHz)
Genuine Windows 7 Home Premium 64
14.0 HD+ (1600 x 900) LED Backlit Anti-Glare Display, Mobile Broadband
Ready
Intel HD Graphics 3000
4 GB DDR3 - 1333MHz (1 DIMM)
UltraNav with TrackPoint & touchpad plus Fingerprint reader
500 GB Hard Disk Drive, 5400rpm
DVD recordable multiburner
6 cell Li-Ion Battery - 55+
Bluetooth 3.0
ThinkPa... 阅读全帖
m******a
发帖数: 553
30
比如:
Lenovo™ ThinkPad® W520 (CV4) Add accessories
T4284CV4
Add to cart
Your price
$531.75*
IBM Web Price
$709.00*
Sale!
Free Extended Warranty - Laptops
Sale!
Free 16GB USB Flash drive with laptop or desktop purchase
In stock**
Entertainment Special
Used Laptop (Refurb)
Intel® Core™ i7—2720QM 2.20 GHz
Microsoft Windows 7 Professional Edition
16384MB/16384MB
Built-in Camera
160GB Solid State drive
15.4" WXGA
CD-RW/DVD-RW Combo
None
Gigabit Ethernet
None
In... 阅读全帖
D***3
发帖数: 12712
31
.........
自己喜欢哪台就买哪台呗
现在基本被人抢光 没啥DEALS了
laptop觉得i5 2520m/2540m 还行
之前想125刀买台i5 2520m
desktop就i7 2600 两百左右
g***n
发帖数: 14250
32
来自主题: Hardware版 - 想买个LAPTOP, 请推荐配置等
想买个便宜笔记本,这个可以么?hehe
可惜分辨率太低了。。。
ThinkPad T420 14.0" Laptop (Core i5-2520M 4GB 320GB Win7Pro - Manufacture
Refurbished) $220, Jan 24
NewEgg@eBay has ThinkPad T420 14.0" Laptop (Core i5-2520M 4GB 320GB -
Manufacture Refurbished) for $219.99. Shipping is free.
c*********s
发帖数: 279
33
来自主题: Hardware版 - cpu benchmark准吗
比如我用过x220用2520m,分数是3500,还有一个lattitude是5500u,分数4000,其他
硬件差不多,但感觉一个地一个天啊,2520m连gnome3.0都跑不流畅
反而有些m处理器的跑起来感觉还行,但分肯定没的高
w*******y
发帖数: 60932
34
I've been on the lookout for a Multitouch Tablet PC for the past few months,
and this is the lowest price I've seen for a high-end full-size multitouch
tablet from Lenovo. This is the newest model (X220T) that came out about a
month ago (upgrade of the X200t and X201t Tablet PCs).
If you have a Mastercard, go through Link:
http://www.marketplace.mastercard.com
and their link to Lenovo.com to get the below specs for $1019.15 (Corporate
Perks from MC Marketplace + free 4GB memory upgrade + free sh... 阅读全帖
q*d
发帖数: 22178
35
来自主题: Military2版 - 估算电磁炮的一些参数
导轨的宽度用目测数值(以那几个站在导轨傍边的人为参照)≈1m
导轨长度(同上)≈10m
弹丸初速由那篇文章的数字:5637mph=2520m/s
弹丸质量由那篇文章给出的33MJ的动能得出:10Kg
由导轨长度和初速可以得:
1/2*a*t^2=10
a*t=2520
这样可以解出加速度a=3×10^5m/s^2≈30000g
加速时间t=7.9ms
这样F=ma=3×10^6N.
按照wiki上的公式:F=μ0/(2π)*I^2*ln((d-r)/r)
其中d是导轨宽度就是前面估算的1m,r是导轨的半径,同样目测的话大约5cm,
这样得出I≈2.3×10^6A,即230万安培的电流,7.9ms的时间
同样按wiki,平均的B≈1.3T
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