A drive-through or drive-thru (a sensational spelling of the word through), is a type of take-out service provided by a business that allows customers to purchase products without leaving their cars. The format was pioneered in the United States in the 1930s by Jordan Martin, but has since spread to other countries. Hillcrest State Bank, Dallas, Texas, installed the first drive-through banking system in America. It was a George Dahl designed building, constructed in the 1920s, across from SMU. The second recorded use of a bank using a drive-up window teller was the Grand National Bank of St. Louis, Missouri in 1930. The drive-up teller allowed only deposits at that time.Orders are generally placed using a microphone and picked up in person at the window. A drive-through is different from a drive-in in several ways - the cars create a line and move in one direction in drive-throughs, and normally do not park, whereas drive-ins allow cars to park next to each other, the food is generally brought to the window by a server, called a carhop, and the customer can remain in the parked car to eat. However, during peak periods, to keep the queue down and avoid traffic flow problems, drive-throughs occasionally switch to an "order at the window, then park in a designated space" model where the customer will receive their food from an attendant when it is ready to be served. This results in a perceived relationship between the two service models.
Drive-throughs have generally replaced drive-ins in popular culture, and are now found in the vast majority of modern American fast-food chains. Sometimes, a store with a drive-through is referred to as a "drive-through", or the term is attached to the service, such as, "drive-through restaurant". or "drive-through bank".
Drive-throughs typically have signs over the drive-through lanes to show customers which lanes are open for business. The types of signage used is usually illuminated so the "open" message can be changed to a "closed" message when the lane is not available.
I looking for help on a problem I am trying to solve here at work. I am not an ME, so my mechanics knowledge is low. This isn't helped by the fact that my mechanics class was 13 years ago. I have a label applicator that is not geared correctly, so it runs slower than the wrapper that it is...
Energy is needed to "drive" an ecosystem
Energy is needed to "drive" an ecosystem. What is the fundamental source of that energy?
A. Chemical Bonds
B. Heat
C. Organic Fuel
D. Sunlight
I am not sure about this question but I think the answer is D. Sunlight is this correct? And if so why ?
Hi all. I don't know if I have posted this in the right section, but I am hoping someone might be able to lend me a hand with a project.
A friend on mine and I are always looking to build something challenging and unique. We recently finished building a truck completely from the ground up...
I am trying to lift a load with a drill motor. I have a chain drive with a 3.7x1 ratio - 13 teeth on the drive gear with a 2.5" diameter and 48 teeth on the driven gear with a 7.75" diameter. It lifts the load easily.
I also have a geared drive (no chain) with a 4.0x1 ratio - 16 teeth on...
I just registered for this forum as I have a problem that needs solved. I am building an industrial museum in Youngstown, Ohio, and the centerpiece of our collection is a 230 ton stationary steam engine which we saved from a local steel mill. I am designing an electric drive for it so that we...
A recent paper says that Alcubierre's warp drive probably won't work due to quantum effects:
http://www.technologyreview.com/blog/arxiv/23292/ -- nontechnical summary
http://arxiv.org/abs/0904.0141 -- paper
Speaking as a non-specialist, it seems hard to tell which predictions about the...
I recently installed a new hard drive as my old one was damaged. I couldn't retrieve anything from my old hard drive so I had lost some items of software (for example, I had to buy a new webcam as I no longer had the driver for my old one).
However, for some reason my speakers do not work with...
I am interested in learning more about the Alcubierre warp drive. Although I've read every qualitative description imaginable plus Lillian Lieber's The Einstein Theory of Relativity, which gives a BRIEF introduction to the math behind GR, I am totally lost when it comes to the math. Although I...
My wife's computer hard drive failed the other day. She backed up her data, but on a partition on the same drive. The failure was mechanical, the spindle motor froze up. So accessing the backup partition was also out of the question. I was afraid we were doomed, but I read about people who...
Apparently Tiger Woods is interested in the LHC. Perhaps he thinks it will help him in his game.http://blog.taragana.com/sports/2009/12/05/tiger-woods-drives-physics-books-sales-sky-high-53288/"
Dear guys
I need assistance regarding optimization problem.
I have to minimize the power loss in worm gear drive system.
I have formulated minimization function,and constraints,how to solve the function and find design vectors.
ANy suggestions,sites,ref.welcome
Thank u
Prakash
Can anybody help me with these forces, I appreciate the effort.
The roller shown sitting on top of the circle which is the bictcle tire is spinning counterclockwise imparting a tangential force on the bicycle wheel.
Is the roller creating the force to drive the wheel forward, or is the entire...
My 1 TB external hard drive which currently houses about 850 gbs worth of media is having an issue.
It won't display in my computer but it displays in disk management in black as 931 gb of unalloacted space. When I right click I can't assign it to a drive letter.
When disk management pops...
hi guys
I read something interesting yesterday(atleast to me) that weight transfer can occur in a car due to drive torque from driveshaft to axle which causes axle to rotate. I found it strange that why drive torque in differential will rotate the whole axle(a small angle however).Can u tell me...
I am college senior in biomedical engineering and am working on a project which will involve the use of a CDROM drive for a senior design project. For the project what i will need to be able to take a CD and be able to tell the drive to point to a specific spot on the cd and read the data. I am...
The last time I defragged a hard drive was on my desktop computer with windows vista. My laptop seems to be slowing down slightly, I was hoping to defrag it, as it has not been for a very long time. I don't know where to go to access this feature in windows XP. I use "search" in the start bar...
hi
in jet engine power generated for two purpose
one is to drive the turbine, compressor and other accosseries
Second is for the forward jet thrust
take an example
A engine generates 15000 lb thrsut.
how to calculate the following power and mass flow
how much amount of...
I have a question regarding the bearing loads on a set of rotating shaft systems.
The two systems are belt driven, each with one driver and one driven pulley.
Belt tension is higher in system one than in system two.
Rotational speed is higher in system two than in system one.
The pulley...
Hello friends.
I simply couldn't find an easier way to explain what I'm looking for, so here's a drawing.
And my questions are:
1. Does something similar even exists, and how is it called?
2. With the proper masses/ratios/calculations/whatever & control system, is this device able to...
I recently bought 2 - 1 tb external hard drives from tiger direct.
http://www.newegg.com/Product/Product.aspx?Item=N82E16822111019
My computer and other computers I have tried them on will not recognize them both plugged in together. it only recognizes the one i plug in first then when i...
I have an HP Pavilion a6528p desktop. Whenever I insert a cd or dvd autoplay doesn't start. Then when I click on my computer I shows that there is a disk with data on it, but when I click on it, it says:
"E:/
Application not found"
it used to try to burn a disk even if it had information...
I am trying to do some preliminary calculations for a basic lifting device but some of my numbers seem to be out-of-wack. Could some kind soul take a look if you have a minute spare?
Motor Data (max efficiency)
RPM: 8311 = 870 radians/sec
Torque: 9.213N-cm = 0.09213N-m
Output Power = 870...
Maybe Kinetic energy generators attached on the wheels are something ? If we put a thin small tube in the VERY center of the wheel (where the rotation is fastest) filled with some generators.
I'll try to draw a drawing sometime to be clearer with the generators positions and amounts...
I have a laptop at at the moment but I'm afraid that I chose the wrong one. Its a 16in, 7.1lb monster with a battery life of a measly 2.5hr max. I could upgrade the battery but it would add over a pound in weight and make it even bulkier though.
I'm thinking about returning it (if I can) and...
Hello every1...
I'm a mechanical enggineering student...
I've been studying theory of Machines...
My academic syllabus includes only "Simple Mechanisms"...
Now in Simple Mechanisms...the first thing we get to know is a "Kinematic Link"...
Definition of a Kinematic Link:-it is a rigid or...
What is slip in tube drive shaft ? How it is different from other drive shafts i.e1-piece and 2-piece drive shaft?And what is suitable material of drive shaft ,can we use shaft in bicycle ?
Hi I am trying to designing a robot arm but am having problems calculating the torque required to drive the main shoulder joint.
The arm is 700mm long and weighs 3Kg with a mass on the moving end of 6Kg. The arm is required to rotate repeatedly through 180deg then reverse back to the starting...
I am tasked to design an elevation gearbox that will enable the operator to achieve precise elevation motion of a heavy load (700 to 800 kilograms) with manual force of about 100 N.
As the load is heavy and accuracy required, is it correct that I will need a gear reducing gearbox to act as a...
My understanding of the Alcubierre drive is that a spacecraft is encompassed within a 'bubble' of expanding spacetime (at rear of craft) and contracting spacetime (at the front).
I am trying to understand the role of negative energy in this scheme.
Am I correct in saying that the...
I need to replace my hard drive. The recommendation is: ATA/100 5400 RPM 9.5mm.
I see a lot of faster drive 7200rpm but they are SATA. Is it true I can put this in also because they connector should be compatable. I just need to get 9.5mm or smaller and it would be fine?
What is the...
Why does my flash drive not have enough space when it DOES!?
I am trying to copy a folder that contains an .iso to install a program.
When I right-click the program folder, the properties tab says that size=4.0 GB.
When I right-click my flash drive, the properties tab says free space=7.97...
Hi everyone,
I was wondering if it might be possible to drive the spit on my barbeque using a thermo cyphon in a closed water system...
The idea being to have a standard 22mm domestic copper pipe running through the bbq fire. Both ends of the pipe would be connected to a small water tank...
I used to have to drive across New Jersey and back everyday. This made me laugh.
How to drive in New Jersey
First, you must learn how to pronounce Newark... It is New-erk, not New-ark. (Actually, it's pronounced 'NORK'.)
2. The morning rush hour is from 5:00 a.m. to noon. The evening...
I operate a CNC router table with a high speed spindle. I'm looking to upgrade to a new spindle but need to know if the variable frequency drive I currently have will work with this new spindle.
The new spindle has the following stats: 300Hz, 1kw, 18000RPM.
The frequency drive is made by...
Homework Statement
I'm just working through a few past mechanics papers and this question came up:
A belt drives the circumference of a cylindrical wheel of radius R and mass M with
no slipping. The tension in the belt is T. Friction in the wheel bearing causes an
effective torque N...
I am having trouble with my DVD-R drive.
The computer is one year old. In the beginning all was well - and then I bought new CD-R discs which the burner rejected continuously. Assuming it might be that it just didn't like the discs, I didn't let it bother me and ignored it.
Today I bought...
Stress Calculation on "D" Drive Shaft
Hey guys, I have a problem. I need to calculate the stress on on a shaft that's driving a fan. The shaft setup is pretty simple. It's a basic circular shaft, then one side is milled to a flat, slightly resembling the letter D.
So, of course I have the...
We have often heard that, statistically speaking, it is safer to fly commercial airlines than to drive. How would one measure this? How is it measured actually and is it meaningful? And if anyone has link to the actual numbers, that would be great.
This is my stab at it. Pick a sample...
Homework Statement
A computer is reading data from a rotating CD-ROM. At a point that is 0.030 m from the center of the disc, the centripetal acceleration is 120 m/s2. What is the centripetal acceleration at a point that is 0.050 m from the center of the disc?
Homework Equations
ac =...
I am involved in a legal case and I need to know some things about flash drives.
1. Does anyone know if it is possible to find out for sure exactly when a file was saved onto a flash drive? I know that you can acess the "Date Created" and "Date Modified" information through by right...
A baseball is hit deep to center field. The vertical position from home plate of the ball with respect to time is described by:
v(t) = -20t2 + 103.5t +5 in feet above home plate
The horizontal distance from home plate is described by:
h(t) = 84.32t in feet where t is in seconds
HINT: The...
I got this in my school FYI email:
I think my engine and transmission oil needs more time than that to heat up and work properly. Also, suddenly driving off with a cold engine block is a good way to develop cracks in the cylinder walls - which is why you don't just pull the throttle all the...
I can give the following description to the problem, but I don't specifically know what should be done to drive an actuator (specially a piezoeelctric one) in its resonance frequency using a feedback.
**The sensor consists of a piezoelectric transducer and a vibration pickup. When an...
I am using a gear mechanism in one of the toys that i am making for my baby. but the gear makes a lot of noise. Will replacing it with Roller drive or friction drive reduce the noise?
Is there any other way to reduce noise from gear drive?
I love Star trek and I was thinking, how to create a warp drive.
I have read a discusion about EM waves on this forum, there was written that they do not need any medium for propagation and : “In a simplified sense the oscillating E field sustains the oscillating B field which sustains the...
Dear all,
I need clarification regarding torque requirement in the following arrangement.
Imagine a shaft 25mm diameter 600mm length simply supported and one end.
Gear is attached to drive the shaft.
Load is externally applied via lever arm and different material(polymer) same
diameter...
I recently got the following message during booting;
"Smart failure on Primary IDE Channel 3. Back-up your data, Disk drive failure may be imminent"
I've dealt with this problem previously, only problem now is I have two HD drives. How do I know which one this concerns?