T**********e
发帖数: 29576 | 1
自己家的，9-11以后难道没被fbi监控。
In late 2001, Tom Mueller was sacrificing his nights and weekends to build a
liquid-fuel rocket engine in his garage.
Mueller, a propulsion engineer at Redondo Beach, Calif.–based aerospace
firm TRW, felt like an “unwanted necessity” at his day job. His prolific
ideas about engine design were lost at such a large, diverse company. To
satisfy his creative impulses, he built his own engines, attached them to
airframes and launched them in the Mojave Desert with fellow enthus... 阅读全帖 |
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s****d
发帖数: 1830 | 2 我还真浪费时间差了一下wiki, 潘兴25g横向机动的数据在哪
https://en.wikipedia.org/wiki/Pershing_II_Weapon_System
Flight[edit]
Prior to launch, the missile was referenced in azimuth by its gyrocompass
inertial platform. After launch, the missile followed an inertially guided
trajectory until RV separation. Attitude and guidance commands during
powered flight (except for roll attitude) were executed via the swivel
nozzles in the two propulsion sections. Roll control was provided by two
movable air vanes on the first stage... 阅读全帖 |
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b********n
发帖数: 38600 | 3 Rubio is a fucking tool.
Trump is a fucking dousche nozzle.
Huckabee is a fucking choad.
Fiorina is a fucking dickhead.
Christie is a fucking pig.
Bush is a fucking asshat.
Kasich is a fucking clown.
Cruz is a fucking dildo.
Walker is a fucking shitstain.
The only ones I have respect for are Paul and Carson. Because they are
doctors. This doesn't mean they should be president. |
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t**x
发帖数: 20965 | 4 How to verify that I'm not getting ripped off by gas station technician
quote
September 16, 2009 3:45 PM Subscribe
I drive away with the gas nozzle still in my car. Dumb, I know. But, now the
attendent says I owe him $692 to have it put back in by a technician. How
can I validate this amount? |
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a***e
发帖数: 27968 | 5 RD-170 800吨的推力其实也就4米不到
spacex的柱子是3.66米，可是看底部的占地，怎么也得有4.5米
毕竟直径上是3个连成一排还有缝
除非马科斯个子不到1.5，否则那个nozzle的直径怎么也是1.5米的级别 |
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s*****V
发帖数: 21731 | 6 你不知道Merlin发动机原型MC-1 engine 就是NASA开发的，但是没有使用，通过技术转
让给了spaceX.
The engine design used an inexpensive, expendable, ablatively cooled carbon
fiber composite nozzle, and produced 60,000 lbf (285 kN) of thrust.
Engine system development testing of the MC-1 began in 1997 [4] and
continued until the Fastrac program was cancelled 2001,[5] 48 tests were
conducted on three engines using three separate test stands.[6]
The engine never flew, but with NASA's cooperation much of the MC-1 design
and technology ... 阅读全帖 |
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s*****r
发帖数: 11545 | 7 Have you guys ever tried to fill any container other than the tank of a
vehicle? Maybe those gas stations I patronize in have outdated nozzles? I
swear to Chairman Mao that I can get gas out of them without any container
just like a water hose once my credit card transaction is approved. |
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S***i
发帖数: 289 | 8 Dave Mohr, 38 years working in and around NASA as a contractor, 20 years in
Shuttle program
Answered Feb 9, 2017
While I worked in the Shuttle Program, the SRB people worked down the hall
from me. Their best in-house cost estimate was that it cost betwen 2.5X and
3.0X more to re-use the SRB casings than to make them expendable.
Not exactly the way it was intended.
1.5k Views · View Upvoters · Answer requested by Richard Campbell
Upvote13
Downvote
Share
Allen E Hall
yes letting them fall into the... 阅读全帖 |
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发帖数: 1 | 9 负压？哪边是负压？里面外面？油箱里只有正压。流体往封闭空间注入，哪来的负压？
而且nozzle就是靠油箱里的正压才会自动停止的。你别让伪娘那屄给装逼带沟里去了，
那个老光棍是个地道的傻逼装逼货。你下班时顺便加把油，看看油枪不插进去出不出油
。这年头了，别做有老婆但坚定认为女人比男人牙齿多两颗牙的亚里士多德了。 |
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j*****p
发帖数: 24000 | 10 我就在BP见过绿色的gas nozzle,而且没有diesel的枪
如果全部是绿色的枪也太坏了 |
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j**l
发帖数: 486 | 11 https://www.nasa.gov/press-release/nasa-announces-new-tipping-point-
partnerships-for-moon-and-mars-technologies
凭啥只给 SpaceX 3米， 而给了 Blue Origin 10 米？
Cryogenic Propellant Production and Management
• Blue Origin LLC of Kent, Washington, $10 million
A ground demonstration of hydrogen and oxygen liquefaction and storage,
representing rocket and spacecraft propellant that could be produced on the
Moon. The demonstration could help inform a large-scale propellant
production plant suitable fo... 阅读全帖 |
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h****l
发帖数: 7290 | 12 compressor's blades.
typically, for turbojet
if the force forward is 100%
50% on compressor
30% on combustion chamber
20% on nozzle
while 50% on turbine, but backwards.
so 50% of the forward force forms thrust. |
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p*********e
发帖数: 32207 | 13 还有点儿没弄明白
这个force forward指的是什么?向前的作用力?
你的意思是说燃烧室里混合汽燃烧膨胀之后,
向前的作用力有50%作用在高压压气机(燃烧室之前),30%作用在燃烧室的壁上
然后20%作用在喷嘴上?
那后面的50% on turbine是指全部作用力的一半是向后的,
全部作用在turbine上从而驱动compressor?
然后形成thrust的是chamber+nozzle的部分? |
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h****l
发帖数: 7290 | 14 不是，那部分较扩压器，diffuser
nozzle是涡轮后的那部分，你给的图里面的exhaust部分。
包括喷管和内锥。 |
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c******o
发帖数: 1184 | 15 I like this comment
++++++++++++++++++++++++++
haavarla's Avatar
haavarla haavarla is offline
Rank 5 Registered User
Join Date: Dec 2008
Location: Norway
Posts: 1,323
From the latest pics i must say its an interesting design and quite nice to
look at too.
I like it.
Congratulation China.
The nose, canopy and partial the air inlets looks like its been copy paste
from the F-22.
The aft engine section and nozzles comes from the Mig-1.44 demonstrator.
Oh, and the MLG are from Flankers ... 阅读全帖 |
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p*********e
发帖数: 32207 | 16 应该就是通过发动机的推力矢量功能吧
我估计它这个可能是在nozzle内部加上了diy的推力矢量机制 |
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k******a
发帖数: 2436 | 17 The J-10 is a classic design with “prop- er” positioning of the center of
gravity, like in the books. This is clear to tell looking at the main
landing gear struts attached to the fuselage somewhere near 15–30% of the
wing’s MAC. So, let us ask ourselves the same question again, why the
Chinese designers shaped the J-20 in the way it is?
Here are some suggestions.
First, to achieve smooth airflow with de- sirable parameters at the entry to
the en- gine’s fan, the J-20’s designers have to make th... 阅读全帖 |
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q******3
发帖数: 166 | 18 问题问的好，设计不完善的涡扇喷气发动机有时确实会出现你所说的样子。
一般情况下，发动机通过适航认证完善后，就不会发生了。油被雾化后点燃，热胀，然
后过nozzle向后喷出，前面一般有2级的compressor（低压，高压），而且气体进入燃
烧室后也是有一定的速度的，如果计算得当并配合适当的形状，不会出现你说的情况。
此外，由于温度极高，喷出的空气的马赫数也不高，但实际速度已经很高了，跟前面的
冷空气马赫数相似，但是由于温度低，因此速度也低。具体计算过程很麻烦，有时候我
也不信，但是结果就是这样的。
这个不是难点，难点在一般点燃后的温度极高，很少有材料能够长时间抵挡住如此高温
而不发生形变及化学反应，因此需要在发动机壁与被加热的空气中间加一条冷空气隔离
带，在冷空气还没来得及被加热到很高的温度的事后要迅速将空气喷发出去。这个度很
难掌握。
共轴，靠涡轮旋转来带动前段的压气机工作。而涡轮的动力来自于燃烧室的高温燃气的
冲击。我想不明白的是，燃烧室两头都是通的，前通压气机，后通涡轮机，也没有什么
进气口，出气口的活门之类的东西，就是一直通着。为什么气体燃烧后，只往后喷，不
往前喷呢？ 一般... 阅读全帖 |
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o*****a
发帖数: 2335 | 19 2.激光推进原理及特点
2.1 激光推进原理
激光推进的基本原理是将远距离激光能量导入推进器(thruster)中的推进剂中,使其温
度急剧升高,形成高温高压气体或等离子体,然后从喷管(nozzle)中喷射出来,从而产生
推力。
激光推进系统主要包括激光系统、光束发射与控制系统、光船三部分。从是否消耗自身
携带工质看，激光推进的驱动模式可分为大气呼吸模式和火箭烧蚀模式。大气呼吸模式
是将经进气道吸入的空气作为工质，激光击穿空气，产生激光支持的等离子体爆轰波，
推动光船前进的推进模式。这种模式不用消耗自身携带的推进剂（图2）。火箭烧蚀模
式是指激光加热光船自身携带的工质（气体、液体和固体）产生高温高压等离子体，经
喷管推动光船前进的推进模式（图3）。两种激光推进模式都是通过激光与工质的相互
作用，将激光能量转化为等离子体热能，最终转化为光船的动能。当飞行器位于大气层
内时，可利用飞行器尾部抛物面反射镜聚焦地基激光器发出的激光能量，在焦点处点燃
空气等离子体进行推进（大气
模式），这时飞行器不消耗自身质量。当处于大气上层（30km以上）或外空间时转为采
用自携工质（火箭烧蚀模式）。
烧蚀模... 阅读全帖 |
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b*****2
发帖数: 11103 | 20 Bill Sweetman ：China's New Stealth Fighter. Not a repeat from December 2010.
砖家：土鳖的新隐形机——不是2010年11月的火星帖。
The US defense secretary is on his way to Beijing. Time to unveil a new
stealth fighter...
米防长正在去帝都的路上，适逢为新隐形机揭幕的时刻....
Short take-off and vertical landing has been one of the two driving
requirements behind the Joint Strike Fighter design, the other being stealth.
追求短距及垂直起降能力（STOVL）是JSF的两个驱动因素之一，之二便是隐形能力。
STOVL dictated the single engine, and the STOVL solution chosen for the F-35
demands a ... 阅读全帖 |
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p*********e
发帖数: 32207 | 21 http://www.sukhoi.org/eng/planes/military/Su-35/
"
In terms of engineering, the engines are substantially modified AL-31F
production engines employing fifth-generation technologies. They use a new
fan, new high and low pressure turbines, and a new digital control system. A
provision is made for using a vectored thrust nozzle. The modernization has
increased the engine special mode thrust by 16%, up to 14,500 kgf. In the
maximum burner-free mode it reaches 8,800 kgf.
"
且不说航电上的升级,仅考虑动力,117s发动机相对AL... 阅读全帖 |
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发帖数: 1 | 22 Type Intercontinental ballistic missile
Place of origin India
Service history
In service 2016-Current
Used by Strategic Forces Command
Production history
Designer Defence Research and Development Organisation (DRDO)
Manufacturer Bharat Dynamics Limited
Unit cost ₹50 crore (US$7 million)
Specifications
Weight 50,000 kg
Length 17.5 m
Diameter 2 metres (6 ft 7 in)
Warhead Nuclear
Warhead weight 1,500 kilograms (3,300 lb)
Engine Three stage ... 阅读全帖 |
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E*****w
发帖数: 1822 | 25 这事情在加油站工作过的人早都见怪不怪了。
测油压....那些都是冠冕堂皇的敲竹杠手段而已
要做的就是一个人抓一头，然后往里一推
OVER。 |
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D*******l
发帖数: 5462 | 26 this is the best one I have been used.
Craftsman 12V Portable Inflator w/ Digital Tire Pressure Gauge
one of the the best is Auto shut-off helps prevent over inflation
Product Description
Ideal for fast, accurate inflating of car, truck, bike tires, sports balls,
air mattresses, rafts and more. High air flow: delivers up to 250 PSI for
inflation of most vehicle tires. Preset digital tire gauge automatically
shuts off inflator and helps prevent over inflating. Gauge also detaches and
can be used ... 阅读全帖 |
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n****w
发帖数: 2379 | 27 Nozzle frozen, nothing to do with the so called winter or summer fluid |
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a*****l
发帖数: 51 | 28 29号在一家speedway加油站自助加油，第一次那种机器，信用卡刷了后，不懂要先lift
nozzle,弄了几下没出油，就把油枪挂回去，按了几次cancel,以为机器有问题，就到前面的
pump,看上面有操作步骤，明白了，加完油，$39.66，拿了receipt。
今天看信用卡帐单，发现同时还有一笔$40的费用，想起来我加油的时候，有人在用后
面的pump.可是我理解油枪挂回去，credit card transaction就应该结束了，后面的人会插入自
己的信用卡，不会直接拿起油枪加油。似乎当时后面是一家人开着一辆皮卡在加油，难道是他们
加了油，charge我的卡？正好40也很奇怪，我分析可能是他们进去交了40现金，用那个pump,但
机器由于各种原因划到我卡上了？这种情况能找回来吗？今天去加油站，工作人员说要manager才
能差，要下周二。是不是manager可以查pump的交易记录？
有人遇到过这种情况吗？ |
|
C******n
发帖数: 9204 | 29 不懂要先lift
nozzle,弄了几下没出油，就把油枪挂回去
那也就是说你刷了卡之后还是把油枪拿起来过，然后又挂回去。那这次交易应该就结束
了。
就到前面的
pump,看上面有操作步骤，明白了，加完油，$39.66，拿了receipt。
也就是说你只是跑去其他地方看，然后继续用原先的枪加，加完放回去了。那这个交易
结束了。我觉得是temp auth。等等吧。
我看你是比较小白。instruction挺清楚，描述还描述不清楚。 |
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u*******r
发帖数: 143 | 30 今天去看了一辆2007年的Audi A4,12500美刀。之前有两次事故，都是追尾。车里车外
看起来倒还挺新的。我查了一下VIN，报告里说有这几样东西换过，分别是：
Brake fluid flushed/changed
Door lock switch replaced
Console repaired
Washer nozzle/jet replaced
Front brake pads replaced
Breather filter replaced
Oil and filter changed chassis lubricated
Glove box door replaced
也不知道这些有没有什么关系，能显示出这车有什么问题么？车主马上要搬去日本，没
时间陪我们做mechanic check。大家帮我看看这车能买么？多谢多谢！ |
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M*R
发帖数: 154 | 31 有的. 如果去偏遠一點的地方, 加油站還是機械數字在跳, nozzle也不是自動的,只能
跳一下. 本人習慣性的又捏了捏(估計接下來百十里地也沒有加油站),然後想到這個問
題立刻停下,發現油已經迸出來了一點.
操心油箱沒有氣化空間會有問題, 接下來幾十邁開的都不踏實. |
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a**n
发帖数: 56 | 32 不大可能
AC 系统正常的情况下也会慢性泄漏点R134；正常的保养方法是至少一个星期使用一次
，即使是大冬天。R134里面的添加剂会因为使用而润滑、密封系统；
你半年一次没用过AC的话，不出意外应该是R134漏到MINIMUM以下了（压力），以致于
压缩机不engage。
解决方法：
1。要个人在驾驶室里面，怠速的时候开空调，同时你在外面打开HOOD， 看压缩机有没
有engage。
2。到AUTOZONE/APP等店里买一瓶 R134 refill kit，就买 refill bottle 和
dispense nozzle （带有压力表，这个很重要）一体的，这个 R134 里面最好带有 anti－
leak 之类的添加剂。然后在youtube 上面 搜索有
关 "R134 REFILL" 的视频；同时你买的kit 也会自带简单的教程。
http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/prod
134a-EZ-Chill-Refrigerant-plus-Oil-(18-oz-)-Interdynamics_701... 阅读全帖 |
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s*******f
发帖数: 1114 | 33 Last Friday 9/2/2011, about 9am. I was adding gas in Patterson
Citgo
473 Broadway, Paterson, NJ 07514-2809 (973) 684-6629
The stuff kept starting and stopping the nozzle, to let the money
go up but not the gas. I
need 1/3 tank to be full, but it showed was added 10 gals. The
manage shout
at me with dirt words("fuck", etc)when I explain the situation.
He robbed my
credit card to pay. |
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s*******f
发帖数: 1114 | 34 I mean the stuff in that gas station kept starting and stopping the nozzle,
which can let money goes faster than gas. Some other people also complained
the similar problem online. |
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p****t
发帖数: 1787 | 35 after you finish pumping gas, he put your nozzle into his tank for one
minute |
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g******z
发帖数: 5809 | 36 Golf R: (2 and 4 door*)
2.0 TSI 256 HP / 243 lbs-ft engine w/ 4MOTION all-wheel drive system,
dual exhaust tips w/ polished finish & sound generator,
18” alloy wheels w/ all-season tires,
sport suspension, rear window wiper,
black-painted brake calipers,
black exterior mirror housings,
body colored door handles and bumper,
rear roof spoiler,
sport front, rear, & side valences,
heated washer nozzles,
power-adjustable, heated exterior mirrors,
Xenon headlamps w/ AFS, daytime running lights,
front... 阅读全帖 |
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g******z
发帖数: 5809 | 37 2baudi有heated washer nozzle不必过于担心 |
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A*O
发帖数: 130 | 38 这是这$2100多出来的全部东西，其实还挺值的
17” Sonoma alloy wheels w/ all-weather tires, leatherette seating surfaces,
power driver seat & lumbar, heatable front seats, chrome window
surroundings, chrome driver side exhaust tip, compass, highline
instrumentation cluster w/ multifunction display, leather-wrapped multi-
function steering wheel w/ audio & phone controls, auto-dimming rearview
mirror, power & heated exterior side mirrors, heated washer nozzles,
leatherette door & side trim panels, leather-wrapped hand... 阅读全帖 |
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p*****a
发帖数: 3634 | 39 I don't understand.
Diesel is much expensive than gasoline.
Don't these stupid guys check the price before inserting the nozzle? |
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p*********s
发帖数: 107 | 40 Coca-Cola Space Shuttle Space Can
Coca-Cola Space Shuttle Can
Item: Coca-Cola Space Shuttle Challenger Can
Price:$2,026.80
Date: Dec. 7, 2011
Bids: 40
Auction: Ebay
Seller: coinsantiques.22
Feedback: 12932 (99%)
Description and Images by: coinsantiques.22
This Auction is for a Coca-Cola First Taste in Space Shuttle Challenger
Space Can. Everything shown in the pictures is included in this auction. It
’s unknown if this item has all of it’s original accessories or parts. We
are not experts with c... 阅读全帖 |
|
h***o
发帖数: 377 | 41 谢谢，主要是NAv，18轮胎，皮椅，皮方向盘多功能，椅调高,roof rail,heated front
washer nozzles,front fog lamps, premium radio, mid w iPod cable compass,
multi functional display 值5500$吗？我一点概念都没有 |
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N**s
发帖数: 1916 | 42 我觉得是pump nozzle的问题. 我遇到过停不下来的. |
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b********6
发帖数: 35437 | 43 车的问题
如果是nozzle问题每个车都会喷，马上会被修好 |
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p*****a
发帖数: 3634 | 44 how do you insert the nozzle into the your puss hole? |
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p*****9
发帖数: 273 | 45 Exxon's nozzles are the same size. |
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d*b
发帖数: 21830 | 46 火油更搞笑了，汽油机里加什么油都发动不起来，而且火油泵的nozzle后面有钢丝的，
油嘴下半部分塞不进汽车的汽油桶，直接的后果是泵不能开启。
而且人油站都说了，没火油，这火油在美国是heating oil,一般只有某些偏远地方才有。 |
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k*******r
发帖数: 2271 | 47 如果Rav4能插入Dissel的nozzle，而别的同类型车不能，就说明Toyota设计有问题。如
果别的加油站不能插入而你加油的那个能插入就说明加油站设计有问题。
不如搞下他们？ |
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A*O
发帖数: 130 | 48 您问题还真多，这次到Tiguan了
不过Tiguan就一个发动机，没区别了
（不好意思，先让我废话两句，别介意）
这是你要知道的，2013 Tiguan SE 和 S的区别，(都不带天窗)
2.0T SE — Includes S features, plus:
18”New York alloy wheels w/ 235/50 R18 97H all-season tires
Leatherette seating
Heatable comfort front seats
Partial power front seats w/manual height adjustment
Silver roof rails
Front fog & cornering lamps
Premium VIII radio w/ Sirius® satellite radio
MDI w/ iPod® cable
Comp... 阅读全帖 |
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I******t
发帖数: 1619 | 49 Passat TDI加油中，我站旁边打电话，邮箱满了nozzle也没有跳，结果油都漫了出来，
流了好多，我的鞋，裤角上也全是柴油，最重要的是，流到了轮胎和刹车片上，现在每
次刹车都有很大的吱嘎吱嘎的声音，很担心柴油会腐蚀brake pad，导致急刹车甩尾。
现在找了油站，油站说不是他们的问题，是Shell的，打电话给Shell，他们说是油站的
问题，不过看起来油站是很蛮横的要耍赖，这种情况下该怎么办？
多谢 |
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g*********e
发帖数: 14401 | 50 you should never use nozzle auto fill.
always pre-calculate how many gallons you want and manually fill to that
amount. |
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