engineering

Mobile lounge

Mobile lounge is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Mobile lounge rather than just read about it. In short: A mobile lounge is an elevated bus-like vehicle used for boarding and disembarking from aircraft, or for transportation between terminal buildings at an airport. Purpose The mobile lounge was an innovative feature of the main terminal at Dulles International Airport, designed by Eero Saarinen.

Key takeaways

Mobile lounge belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Mobile lounge to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Mobile lounge from memory before moving on to harder problems.

Reference excerpt

A mobile lounge is an elevated bus-like vehicle used for boarding and disembarking from aircraft, or for transportation between terminal buildings at an airport.

Purpose The mobile lounge was an innovative feature of the main terminal at Dulles International Airport, designed by Eero Saarinen. Saarinen promoted the mobile lounge concept with a short animated film by Charles and Ray Eames. Dulles Airport was the realization of the concepts expressed in the film. Dulles's designers thought that by shuttling from the main terminal directly to a midfield jet ramp, they could save passengers from long walking distances amidst weather, noise, and fumes on the ramp. The advent of the jet bridge and construction of the two midfield concourse buildings at this airport canceled out the benefits of the system.

Application The mobile lounge is used at Dulles International Airport in the U.S. state of Virginia and at Montréal–Trudeau International Airport in the Canadian province of Quebec. The system was also previously used at Montréal–Mirabel International Airport until passenger services ceased in 2004, John F. Kennedy International Airport's International Terminal in New York City, Baltimore/Washington International Airport in Baltimore, Mexico City International Airport in Mexico City until 2007, Charles de Gaulle Airport in Paris and at King Abdulaziz International Airport in Jeddah, Saudi Arabia until the early 2000s.

While it is still used at Dulles Airport, the growth in passenger numbers and aircraft capacity made it impractical to use mobile lounges for individual flights. Remote concourses were constructed, and the fleet of mobile lounges was reassigned to operate a shuttle between the concourses and the main terminal. On January 26, 2010, the Metropolitan Washington Airports Authority replaced the Dulles mobile lounge system for passenger movements between the Main Terminal and concourses A, B, and C with the underground AeroTrain. However, some mobile lounges and plane mates remain in use for passenger movements between the main terminal and Concourse D (until the replacement concourses C and D are built and the AeroTrain is built out to run in a continuous two-way loop), to disembark international passengers from all arriving international aircraft (with the exception of United Airlines and certain Star Alliance flights, which are directly served at Concourse C's Federal Inspection Station; and flights from airports with border preclearance) and carry them to the International Arrivals Building, and to convey passengers between the main terminal and aircraft on hard stands (i.e., those parked remotely on the tarmac without access to jet bridges). PTVs (Passenger Transfer Vehicles) are still in use at the Philadelphia International Airport at Terminals A-East and A-West. The PTVs are utilized to support international flights in A-East and A-West during peak times, when no regular gates are available.

Variants

Passenger Transfer Vehicle (PTV) The Passenger Transfer Vehicle or Passenger Transport Vehicle (PTV) (mobile lounge) is a 16.5-by-5-meter carriage mounted on a scissor truck, capable of carrying 102 passengers. These vehicles were designed by the Chrysler Corporation in association with the Budd Company, and are nicknamed "moon buggies" due to their otherworldly appearance. When mobile lounges were first introduced, they had ramps at one end that could be raised or lowered to the floor height of an aircraft. However, after Dulles built the midfield concourses, some of the lounges were retrofitted to be used only for inter-terminal passenger transport. The ramps were removed and doors that could interlock with a terminal building were fitted to either end. Mobile lounges have a driver's cab at each end. The wheels at either end of the lounge can be steered, but the wheels at the end opposite the driver lock into a straight-ahead configuration so that the lounge is steered only by the forward driving wheels.

NASA Crew Transport Vehicles Early in the space shuttle program, NASA used the Plane Mate system of mobile lounge to move astronauts directly from the orbiter to crew facilities. A modified vehicle obtained from Baltimore/Washington International Thurgood Marshall Airport in Baltimore, Maryland was used for shuttle landings at Edwards Air Force Base. A similar vehicle was used at the Kennedy Space Center to take astronauts directly from the orbiter to the Operations and Checkout building, where the vehicle was again lifted up for the astronauts to exit directly onto the 2nd floor of the facility.

Gallery

Illustrations

Worked examples

Example 1 — a first encounter with Mobile lounge

Start with the simplest possible case. Write down what Mobile lounge claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Mobile lounge before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Mobile lounge ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Mobile lounge

In research: Mobile lounge appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Mobile lounge in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Mobile lounge is common in secondary-school and first-year university syllabi. It links to neighbouring topics Airport infrastructure, Buses by type, Public transport by mode, so understanding it makes those chapters shorter.
In everyday life: Look for Mobile lounge outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Mobile lounge in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Mobile lounge means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Mobile lounge out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Mobile lounge in simple terms?

A mobile lounge is an elevated bus-like vehicle used for boarding and disembarking from aircraft, or for transportation between terminal buildings at an airport. Purpose The mobile lounge was an innovative feature of the main terminal at Dulles International Airport, designed by Eero Saarinen.

Why does Mobile lounge matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Mobile lounge?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Mobile lounge.