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IGNITION POINT [20 records]

Record 1 2025-05-27

English

Subject field(s)
  • Space Exploration Equipment and Tools
  • Launching and Space Maneuvering
CONT

[The] "cryo arms" support the upper umbilicals which supply the Ariane 6 upper stage with cryogenic top-up fuel, maintain the correct pressurisation of the upper stage tanks, cool the engines before ignition and generally keep the upper stage in an optimal condition right up to the point of liftoff. The same umbilicals allow the fuel to be drained safely if a launch is aborted. Each arm is 13 m [meters] long and weighs 20 tonnes. One arm supplies liquid hydrogen at-250 ºC, the other supplies liquid oxygen at-180 ºC. When Ariane 6 lifts off, these arms will disconnect from the rocket and then pivot away quickly in just 2. 6 seconds to avoid interfering with the rocket's ascent.

Key term(s)
  • cryo-arm

French

Domaine(s)
  • Équipement et outillage d'exploration spatiale
  • Lancement et manœuvres dans l'espace
DEF

Dispositif articulé qui porte la liaison ombilicale entre le pas de tir et le lanceur et qui l'écarte de ce dernier avant le décollage.

OBS

bras cryotechnique : désignation et définition publiées au Journal officiel de la République française le 26 janvier 2025.

Spanish

Save record 1

Record 2 2020-12-16

English

Subject field(s)
  • CBRNE Weapons
CONT

Improvements to tear gas ammunition occurred during the late 1930s, particularly with the larger cartridges. Fuses were incorporated to allow aerial or point of contact gas ignition.

French

Domaine(s)
  • Armes CBRNE
CONT

Les munitions lacrymogènes. À l'instar des bombes de défense, [les] munition[s] lacrymogène[s] permettent d'incapaciter un adversaire par le biais d'un agent chimique.

Spanish

Save record 2

Record 3 2016-05-30

English

Subject field(s)
  • Diesel Motors
  • Engines (Motor Vehicles)
DEF

An adjustable valve in a gas engine with hot tube ignition that automatically opens to permit a portion of the compressed explosive mixture to enter the ignition tube and so cause ignition at any desired point of the stroke.

French

Domaine(s)
  • Moteurs diesel
  • Moteur (Véhicules automobiles)

Spanish

Save record 3

Record 4 2014-03-28

English

Subject field(s)
  • Chemistry
  • Fires and Explosions
  • Combustion and Fuels (Fireplaces)
  • Brush, Prairie and Forest Fires
DEF

The minimum temperature of a material at which sustained combustion can be initiated under specified test conditions. [Definition standardized by ISO.]

OBS

ignition temperature; ignition point : terms standardized by ISO.

French

Domaine(s)
  • Chimie
  • Feux et explosions
  • Combustion et combustibles (Foyers)
  • Incendies de végétation
DEF

Température minimale d'un matériau à laquelle peut être obtenue une combustion soutenue dans des conditions d'essai spécifiées.

CONT

Le point d'inflammation d'un liquide est la température à laquelle il faut le porter pour que les vapeurs émises puissent être enflammées au contact d'une flamme et qu'elles le soient en quantité suffisante pour entretenir la combustion. Cette température, aux exceptions près, est en général légèrement supérieure à celle du point d'éclair. Plus le point d'inflammation est bas dans l'échelle des températures, plus l'inflammabilité du liquide est également élevée.

OBS

température d'allumage; point d'allumage : termes normalisés par l'ISO.

Spanish

Campo(s) temático(s)
  • Química
  • Fuegos y explosiones
  • Combustión y combustibles (Hogares o chimeneas)
  • Incendio de la vegetación
DEF

Temperatura mínima de un material a la cual se puede iniciar la combustión sostenida bajo condiciones de ensayo especificadas.

Save record 4

Record 5 2013-09-19

English

Subject field(s)
  • Analytical Chemistry
  • Fires and Explosions
DEF

... any liquid having a flash point below 37.8 ° C and having a vapour pressure not exceeding 275.8 kPa (absolute) at 37.8 ° C.

CONT

A flammable liquid gives off a vapour which can be readily ignited at normal working temperatures.... Flammable liquids can be extremely hazardous in the workplace; for example :-If there is inadequate ventilation, vapours can travel considerable distances to a source of ignition and flash back to the flammable liquid.-It may be difficult to extinguish a burning flammable liquid with water because water may not be able to cool the liquid below its flash point.

French

Domaine(s)
  • Chimie analytique
  • Feux et explosions
DEF

liquide ayant un point d'éclair inférieur à 37.8 ° C et une pression de vapeur absolue ne dépassant pas 275.8 kPa à 37.8 ° C.

DEF

Hydrocarbures et autres liquides, soit purs, soit formant des mélanges, solutions ou suspensions, émettant des vapeurs susceptibles de prendre feu au contact d'une flamme à une température inférieure à 93 ° C.

OBS

Voir aussi la définition «liquide combustible» désignant les liquides de point d'éclair compris entre 37,8 ° C et 93,3 ° C.

OBS

Tout mélange, dont un ou plusieurs composants ayant un point d'éclair égal ou supérieur à 37,8 ° C (100 ° F) représentent au moins 99 % du volume total du mélange, n'est pas considéré comme un liquide inflammable.

OBS

liquide inflammable : appellation selon le code IATA (transp. aérien) et le Règl. français pour le transport par mer des marchandises dangereuses.

OBS

matière liquide inflammable : appellation selon le code IMDG.

OBS

liquide inflammable : terme uniformisé par le Groupe de travail de terminologie du génie.

Spanish

Campo(s) temático(s)
  • Química analítica
  • Fuegos y explosiones
DEF

Aquel cuyo punto de inflamación es superior a 38°C.

Save record 5

Record 6 2011-11-17

English

Subject field(s)
  • Climatology
DEF

... a soil/duff drought index [developed by Keetch and Byram (1968]) that ranges from 0 (no drought) to 800 (extreme drought) and is based on soil capacity of 8 inches of water. Factors in the index are maximum daily temperature, daily precipitation, antecedent precipitation, and annual precipitation.

CONT

The Keetch Byram Drought Index(KBDI) provides a daily measure of soil dryness, which, in turn, gives an indication of water stress in plants. The KBDI represents the net effect of precipitation and evapotranspiration in producing cumulative moisture deficiency in deep duff or upper soil layers. The KBDI has a range from 0(no drought or soil moisture deficiency, i. e. soil at field capacity) to 2000(extreme drought, maximum soil moisture deficiency possible). The index can be viewed as the amount of rain needed to bring the soil back to saturation, with one mm of rain reducing the index by 10 points. The 0-2000 point scale is divided into three drought classes : 0-999=Low; 1000-1499=Moderate; 1500-2000=High. The KBDI is simple to calculate as it uses only two, daily weather observations-maximum temperature and 24-hour rainfall. The system functions in a book-keeping fashion where estimates of daily evapo-transpiration and measurements of precipitation increase or decrease the value of yesterdays index. The KBDI by itself is not a Fire Danger Rating System as it gives no indicate of the ease of ignition of the vegetation, or of the rate of fire spread, fire intensity and difficulty of control. It does however serve as a useful measure of drought occurrence.

CONT

Keetch-Byram Drought Index (KBDI): ... 0 - 200: Soil moisture and large class fuel moistures are high and do not contribute much to fire intensity. Typical of spring dormant season following winter precipitation. 200 - 400: Typical of late spring, early growing season. Lower litter and duff layers are drying and beginning to contribute to fire intensity. 400 - 600: Typical of late summer, early fall. Lower litter and duff layers actively contribute to fire intensity and will burn actively. 600 - 800: Often associated with more severe drought with increased wildfire occurrence. Intense, deep burning fires with significant downwind spotting can be expected. Live fuels can also be expected to burn actively at these levels.

CONT

... the Palmer Drought Index (PDI) and the Keetch-Byram Drought Index (KBDI) ... were [both] developed by John Keetch and George Byram, and originally were developed as aids for agriculture. The ... KBDI is used extensively in the eastern states and also in some parts of the west.

OBS

In the metric system the value of the index is usually assumed to range from 0 to 200 mm (even though 800 points actually corresponds to 204 mm).

OBS

Keetch-Byram Drought Index [is] a commonly-used drought index adapted for fire management applications ...

OBS

"Duff" is ... an important term in the fire weather program of the US Forest Service, used to describe the partially decayed organic matter on the forest floor which can become highly combustible during drought periods and contribute to the longevity and spread of forest fires. ... the Keetch-Byram Drought Index is sometimes referred to as the soil/duff drought index because it is a measure of how dry the soil and duff layers are.

French

Domaine(s)
  • Climatologie
OBS

On écrirait mieux «sècheresse».

OBS

sècheresse : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2006).

Key term(s)
  • indice de sècheresse Keetch-Byram

Spanish

Save record 6

Record 7 2011-01-13

English

Subject field(s)
  • White Products (Petroleum)
  • Diesel Motors
DEF

A petroleum fraction used as fuel in compression ignition engines. It is obtained from crude fractions in the boiling point range 250°-350°C, that is middle distillates.

DEF

Gas-oil that has been specially formulated for use in medium and high-speed diesel engines, mostly used in the transportation market. [Definition standardized by ISO.]

OBS

DERV: UK abbreviation for "diesel engine road vehicle." DERV fuel is used in compression ignition engines that turn at high speed.

OBS

diesel fuel; DIESO: terminology used at the Department of National Defence.

OBS

diesel fuel: It is often referred to as "automotive diesel fuel."

OBS

diesel fuel; automotive gas-oil; automotive diesel oil: terms standardized by ISO.

Key term(s)
  • diesel engine road vehicle fuel

French

Domaine(s)
  • Produits blancs (Pétrole)
  • Moteurs diesel
DEF

Combustible destiné à alimenter les moteurs diesel, c'est-à-dire à combustion interne à allumage par compression à régime élevé ou moyen.

CONT

Le carburant classique pour moteur Diesel est appelé «gazole». C'est un mélange d'hydrocarbures plus lourds que ceux qui constituent le supercarburant et l'essence.

OBS

L'Administration [le gouvernement français] préconise d'écrire gazole.

OBS

On écrirait mieux «diésel».

OBS

diésel; gasoil : Ces graphies, puisées des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, sont attestées dans le Petit Robert (2004).

OBS

carburant diesel : terme normalisé par l'OQLF.

OBS

carburant diesel; DIESO : terminologie utilisée au ministère de la Défense nationale.

OBS

carburant diesel; gas-oil auto; gazole : termes normalisés par l'ISO.

Spanish

Campo(s) temático(s)
  • Productos blancos (Petróleo)
  • Motores diesel
OBS

El producto de destilación del petróleo que sigue al keroseno. Punto de inflamación 76 °C; se emplea para carburar el gas de agua en las fábricas de gas y como combustible para motores Diesel, fijos o de carruajes.

Save record 7

Record 8 2010-02-10

English

Subject field(s)
  • Fire Prevention
CONT

Preventing Ignition. The idealistic method would be to prevent ignition all together. To be effective, the prevention of ignition requires continuous monitoring for success. Fire prevention programs are only effective to a point, None provide absolute assurances that a fire will not occur.

OBS

See record "fire prevention/prévention des incendies".

French

Domaine(s)
  • Prévention des incendies
CONT

Pour être efficace, la prévention de l'inflammation exige une surveillance permanente. Les programmes de prévention des incendies ne sont efficaces que dans une certaine mesure. Aucun ne fournit la garantie absolue qu'un incendie n'éclatera pas.

OBS

Voir la fiche «fire prevention/prévention des incendies».

Spanish

Save record 8

Record 9 2010-02-09

English

Subject field(s)
  • Fire Prevention
CONT

Preventing Ignition. The idealistic method would be to prevent ignition all together.... the prevention of ignition requires continuous monitoring for success. Fire prevention programs are only effective to a point. None provide absolute assurances that a fire will not occur. No matter how diligent we are in controlling heat energy sources from fuels, mechanical friction, chemical reactions, heating appliances, electric systems, exterior fires, and/or arson, and natural disasters, it is not realistic to expect that fires can be eliminated 100% from buildings solely by means of fire prevention methods.

French

Domaine(s)
  • Prévention des incendies
CONT

Prévenir l'inflammation. La méthode idéale consisterait à prévenir l'inflammation purement et simplement [...] la prévention de l'inflammation exige une surveillance permanente. Les programmes de prévention des incendies ne sont efficaces que dans une certaine mesure. Aucun ne fournit la garantie absolue qu'un incendie n'éclatera pas. On a beau faire preuve de diligence dans le contrôle des sources d'énergie calorifique produite par les combustibles, la friction mécanique, les réactions chimiques, les appareils de chauffage, les systèmes électriques, les feux à l'extérieur ou les incendies volontaires et les désastres naturels, il n'est pas réaliste de s'attendre à ce que les méthodes de prévention des incendies suffiront à elles seules à éliminer tous les incendies dans les immeubles.

Spanish

Save record 9

Record 10 2008-05-05

English

Subject field(s)
  • Aircraft Systems
  • Helicopters (Military)
CONT

The fire extinguishing equipment for an airliner such as the Douglas DC-10 incorporates three systems with six pressurized agent containers, two for each engine. The containers for the wing-mounted engines are located in pairs in the leading edge of the wing between the nacelle and the fuselage on each side of the aircraft.... The discharge cartridge is an electrically fired explosive unit that provides force to rupture the disk seal in the outlet port of the container and release the extinguishing agent to the deployment lines. One discharge cartridge is installed on each wing-mounted container and two are installed on the aft-engine container. The discharge cartridge contains two squibs(explosive charges) that are fired by an electric circuit that heats the powder to the ignition point. When the fire extinguisher control handle is pulled down, the electric circuit is closed and the squibs are fired. The force of the explosion ruptures the disk seal, thus releasing the extinguishing agent. A screen in the discharge head prevents particles of the disk from entering the deployment line.

OBS

This system is specific to the McDonnell Douglas Corporation aircraft (DC-9, DC-10).

OBS

fire control handle : term officially approved by the Aeronautical Terminology Standardization Committee (ATSC) - Helicopters.

French

Domaine(s)
  • Circuits des aéronefs
  • Hélicoptères (Militaire)
OBS

poignée coupe-feu : terme uniformisé par les Comités d'uniformisation de la terminologie aéronautique (CUTA) - Hélicoptères et Maintenance.

Spanish

Save record 10

Record 11 2001-03-16

English

Subject field(s)
  • Fire-Fighting Techniques
  • Brush, Prairie and Forest Fires
DEF

A method of differentiating between ground and aerial ignition, between line and point source ignition, or of reflecting the type of fire resulting from one or more ignitions.

French

Domaine(s)
  • Manœuvres d'intervention (incendies)
  • Incendies de végétation
DEF

Terme servant à différencier les types d'allumage aérien et terrestre à partir d'un point ou d'une ligne ou à indiquer le type de feu résultant.

Spanish

Save record 11

Record 12 2001-02-21

English

Subject field(s)
  • Fire-Fighting Techniques
  • Fire Prevention
  • Silviculture
CONT

Fires can be extinguished by reducing the temperature below the point of ignition, through the application of water or moist mineral soil on the burning material. This practice is often referred to as "cooling" the fuel.

French

Domaine(s)
  • Manœuvres d'intervention (incendies)
  • Prévention des incendies
  • Sylviculture
DEF

[...] technique [...] [qui] agit sur la combustion en réduisant la chaleur au-dessous du point d'inflammabilité [...] par application d'eau ou de terre minérale humide sur les matériaux en ignition.

Spanish

Campo(s) temático(s)
  • Maniobras de intervención (incendios)
  • Prevención de incendios
  • Silvicultura
DEF

Método por el que el fuego se extingue, eliminando o disminuyendo la energía de activación de la reacción combustible-comburente.

Save record 12

Record 13 2000-05-31

English

Subject field(s)
  • Burners and Steamfitting
DEF

The period of time after ignition trials and before the operating set point is reached during which the main burner is firing.(In a flame safeguard programming control, the timer stops.)

French

Domaine(s)
  • Fumisterie et brûleurs
CONT

Phases de fonctionnement automatique d'un brûleur à fuel : Démarrage [...] Marche : le brûleur reste en fonctionnement aussi longtemps que le point de consigne du thermostat d'ambiance ou de la chaudière n'est pas atteint. Dérangement [...]

Spanish

Save record 13

Record 14 2000-05-25

English

Subject field(s)
  • Burners and Steamfitting
DEF

A gas burner which uses venturi action to bring in combustion air.

CONT

Practically all residential-commercial gas appliances and some industrial gas-fired appliances use injection-type gas burners. A jet of gas thrusts primary air for combustion into the burner and mixes it with the gas. This mixing occurs before the gas reaches the burner ports or point of ignition.

French

Domaine(s)
  • Fumisterie et brûleurs
CONT

Brûleurs à combustibles liquides : (Brûleurs à pulvérisation d'émulsion) [...] les brûleurs à mélange préalable (brûleurs à injection), dans lesquels le combustible est admis dans un surpresseur d'air où il s'émulsionne, se réchauffe par absorption de la chaleur de compression et se gazéifie partiellement. Le mélange traverse ensuite un éjecteur comportant un chicanage qui pulvérise l'émulsion.

Spanish

Save record 14

Record 15 1998-10-07

English

Subject field(s)
  • Fires and Explosions
DEF

That part of a flame projection that extends from its point of ignition back to the aerosol container.

CONT

Flash back occurs when a trail of flammable gas, vapour or aerosol is ignited by a distant spark, flame or other source of ignition. The flame then travels back along the trail of gas, vapour or aerosol to its source. A serious fire or explosion could result.

French

Domaine(s)
  • Feux et explosions
DEF

Dans les feux de liquides inflammables, mouvement de la flamme tendant à remonter de la source d'inflammation au récipient de liquide.

CONT

Un retour de flamme se produit lorsqu'un gaz, une vapeur ou un aérosol inflammable, se propageant sur une certaine distance, rejoint une source de feu (étincelle ou flamme) et s'enflamme. La flamme fait alors le trajet à rebours jusqu'à la source de gaz, de vapeur ou d'aérosol et risque de causer une explosion ou un incendie grave.

Spanish

Campo(s) temático(s)
  • Fuegos y explosiones
Save record 15

Record 16 1993-01-06

English

Subject field(s)
  • Servicing and Maintenance (Motor Vehicles and Bicycles)
  • Ignition Systems (Motor Vehicles)

French

Domaine(s)
  • Entretien et réparation (Véhicules automobiles et bicyclettes)
  • Allumage (Véhicules automobiles)

Spanish

Save record 16

Record 17 1992-11-02

English

Subject field(s)
  • Servicing and Maintenance (Motor Vehicles and Bicycles)
  • Engines (Motor Vehicles)

French

Domaine(s)
  • Entretien et réparation (Véhicules automobiles et bicyclettes)
  • Moteur (Véhicules automobiles)

Spanish

Save record 17

Record 18 1981-04-29

English

Subject field(s)
  • Ignition Systems (Motor Vehicles)
  • Engines (Motor Vehicles)

French

Domaine(s)
  • Allumage (Véhicules automobiles)
  • Moteur (Véhicules automobiles)

Spanish

Save record 18

Record 19 1976-06-19

English

Subject field(s)
  • Mechanical Components
  • Ignition Systems (Motor Vehicles)

French

Domaine(s)
  • Composants mécaniques
  • Allumage (Véhicules automobiles)

Spanish

Save record 19

Record 20 1976-06-19

English

Subject field(s)
  • Ignition Systems (Motor Vehicles)

French

Domaine(s)
  • Allumage (Véhicules automobiles)

Spanish

Save record 20

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