physics

Taverny Air Base

Taverny Air Base is a physics 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 Taverny Air Base rather than just read about it. In short: Taverny Air Base (formerly Base Aérienne 921 "Frères Mahé" de Taverny; ICAO: LFPJ) is located in the communities of Taverny and Bessancourt in the Val-d'Oise department of France, 20 km (12.4 mi) north-northwest of Paris. From 1964 to 2007 and again since 2024 it has been the headquarters of the Strategic Air Forces Command, the nuclear strike force of the French Air and Space Force, with an underground command cent…

Key takeaways

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

Reference excerpt

Taverny Air Base (formerly Base Aérienne 921 "Frères Mahé" de Taverny; ICAO: LFPJ) is located in the communities of Taverny and Bessancourt in the Val-d'Oise department of France, 20 km (12.4 mi) north-northwest of Paris. From 1964 to 2007 and again since 2024 it has been the headquarters of the Strategic Air Forces Command, the nuclear strike force of the French Air and Space Force, with an underground command center. The base is divided into three tiers with an area of approximately 15 hectares:

The first tier is underground in a former gypsum quarry beneath the Forest of Montmorency. The facility comprised the hardened command facility for the French Air Force. The second tier is on the surface, and provided support services for the underground command center. The third tier is at the top of the hill, with facilities for secure military communications. There were no aviation facilities apart from a heliport.

Description The base is located on the flank of the heights of the community of Taverny, with the hardened facility between 70 and 80 meters below the surface in the former quarries. The tunnels are large enough for trucks to enter. The underground climate is described as warm and dry, but the tunnels require monitoring for water penetration and dissolution of the gypsum. Somewhat more than 1000 personnel are employed at the base. The facility is provided with backup power and an independent water supply. A 2000m² Faraday Cage was completed in 1993 after six years of construction - one of the largest in Europe.

History 1815: First commercial exploitation as a gypsum quarry. 1941–1944: During World War II, the German occupiers converted some of these tunnels for industrial use. The SKF ball bearing factory was moved there from south of Paris. At the time of the Allied invasion, the manufacture of ball bearings had been started. The two main tunnels were connected and an entrance structure with gates was constructed. Before their evacuation of Paris, the Germans destroyed the equipment in the tunnels. Several places in the area of the plant show evidence of fire. According to a villager, the Germans used oil fires to destroy the equipment. This caused cracking and falling rocks. Mines and booby traps were left behind in the tunnels and the nearby woods; these were removed, along with the remains of the plant, by the U.S. Army. There is no evidence that the Allies bombed the tunnels during the occupation. 1946: The French Air Force used the quarry as a depot. 1957: The creation of the Air Defense Operations Center (Centre d'Opération de la Défense Aérienne - CODA). 1961: The creation of the Territorial Air Defense Staff (Etat-major de la Defense Aérienne du Territoire - DAT) and the Air Force Air Defense Command (Commandement Air des Forces de Défense Aérienne - CAFDA). These organizations were dissolved in 1994 and replaced with the Air Defense and Air Operations Command (Commandement de la Défense Aérienne et des Opérations Aériennes - CDAOA) and its Air Operations Center (Centre de Conduite des Opérations Aériennes - CCOA). 1963: Creation of BA921, attached to the 2nd Air Region, and the installation on the surface of the Strategic Air Forces Command (Commandement des Forces Aériennes Stratégiques - CFAS). 1967: Installation of the Strategic Forces Operations Center (Centre d'Opérations des forces stratégiques - COFAS) underground. 1988: BA921 takes the name "Frères Mahé" ("Brothers Mahé" in English) in homage to three brothers killed in the command of their aircraft. 1992: Installation of the Special Operations Command (Commandement des Opérations Spéciales - COS). 2000: BA921 was attached to the Northern Air Region. 2006: Special Operations Command (COS) moves to BA107 at Villacoublay. 2007: The Air Operations Center moves to BA942 at Lyon Mont-Verdun. At the same time, the Air Defense and Air Operations (CDAOA) moves to BA117 in Paris and the Air Information Center (Centre de Renseignement Air - CRA) moves to BA128 at Metz. 2011: BA 921 is disestablished on 5 July 2011. 2020 : In the spring of 2020, it is decided to relocate the headquarters of the Strategic Air Forces on the base, i.e. a hundred people plus the ancillary services in 2024

Nuclear deterrent Taverny provided information to the following organizations:

The commander of the strategic air forces (Commandement des forces aériennes stratégiques - CFAS), which constitute one leg of France's nuclear deterrent. The Analysis and Simulation Center for the Preparation of Air Operations (Centre d'Analyse et de Simulation pour la Préparation des Opérations Aérienne - CASPOA). The Military Air traffic Control (Direction de la Circulation Aérienne Militaire - DirCAM). The Meteorology Center for External Operations (Centre de Météorologie des Opérations Extérieures - CMOE)

Other facilities A similar Air Force facility exists northwest of Lyon at BA942 Lyon-Mont Verdun. The French Navy's counterpart facility, controlling the ballistic missile submarine strike force (Force océanique stratégique - FOST), was located about 20 km to the south at Houilles, Yvelines.

References

Illustrations

Worked examples

Example 1 — a first encounter with Taverny Air Base

Start with the simplest possible case. Write down what Taverny Air Base claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, 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 Taverny Air Base 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 Taverny Air Base 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 Taverny Air Base

In research: Taverny Air Base appears in physics 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 Taverny Air Base 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: Taverny Air Base is common in secondary-school and first-year university syllabi. It links to neighbouring topics Buildings and structures in Val-d'Oise, Cold War sites in France, Continuity of government, so understanding it makes those chapters shorter.
In everyday life: Look for Taverny Air Base 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 Taverny Air Base in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Taverny Air Base 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 Taverny Air Base out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Taverny Air Base in simple terms?

Why does Taverny Air Base matter?

Because it connects several physics 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 Taverny Air Base?

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 Taverny Air Base.