Which type of detector is typically found in aircraft hangars?
Optical flame detectors
Optical flame detectors must be positioned so they have a view beneath the aircraft’s wings and fuselage. Therefore, detector mounting heights are often dictated by the smallest aircraft stored in the hangar. It is equally important, however, to consider possible movable obstructions such as toolboxes and ladders.
What are the three types of smoke detectors on a commercial aircraft?
Three types of smoke detectors are certified for use in the lavatories and crew rest compartments, as well as in some galley complexes, purser work stations, video control centers, and business centers: ionization-area type, photoelectric-area type, and photoelectric-ducted type.
What is used for smoke detection in the cargo of an aircraft?
In all cases, the smoke detection systems can detect a fire at a temperature significantly below that at which the structural integrity of the airplane could be adversely affected. Almost all cargo compartment smoke detectors are based on photoelectric sensing.
What are the two types of smoke detectors used in aviation?
Another type of fire system that is used on aircraft is smoke detectors. There are two types of smoke detection systems such as light refraction type and ionization type.
What is the more common and less expensive type of smoke detector?
Ionization smoke detectors are more common and less expensive than photoelectric smoke detectors. Photoelectric smoke detectors are more responsive to a slow-burning or smoldering fire. Both ionization and photoelectric smoke detectors are acceptable life-safety devices.
What is the most common type of smoke detector?
The two most commonly recognized smoke detection technologies are ionization smoke detection and photoelectric smoke detection. Ionization smoke alarms are generally more responsive to flaming fires.
Why should heat detectors not be used in place of smoke detectors?
This is because a smoke detector will typically detect a fire more quickly than a heat detector. For example, regular cooking activity in the kitchen could produce fumes that may cause a smoke detector to activate. With that in mind, heat detectors are typically used instead of smoke detectors in kitchens.
What are the three basic types of smoke detectors?
There are three types of smoke alarms, ionization, photoelectric and a combination of the two which is commonly called a “dual” detector.
In what areas of an airplane are smoke detectors most likely to be used?
They are most often found on reciprocating engine aircraft with exhaust shroud heaters and on aircraft equipped with a combustion heater. Turbine bleed air, when used for heating the cabin, is tapped off of the engine upstream of the combustion chamber.
What are the two basic types of continuous loop fire detection systems?
Most modern aircraft use a fire detection system called a continuous loop; of which the two main types are electrical and pneumatic.
How do airplane smoke detectors work?
The typical aircraft smoke detector works using optical sensing which exploits the Tyndall light scattering effect. An LED illuminates a sample of air while a light sensor, which is not in line-of-sight with the LED, looks at the same sample of air.
What are two types of smoke detection technologies?
Generally, there are two types of home smoke alarms: photoelectric and ionization.
What kind of smoke detector does an airplane use?
Some aircraft use an ionization type smoke detector. The system generates an alarm signal (both horn and indicator) by detecting a change in ion density due to smoke in the cabin.
How are flame detectors used in aircraft hangars?
Triple infrared flame detectors, designed for long distance detection and high false alarm immunity, are positioned in each corner to cover the entire hanger. To avoid unwarranted discharge of the foam, the flame detection system is configured to require two detectors to register the fire before the foam is discharged.
Why do we need fire protection in aircraft hangars?
Installing firefighting equipment in aircraft hangars is as much about protecting the aircraft as it is the hangar itself, such is the cost differentiation between the hangar and its contents. Solutions have to be fast, effective and unerringly reliable if multi-million dollar aircraft are to be safeguarded.
Which is an example of a beam smoke detector?
Beam Smoke Detectors are used to provide smoke detection for large areas and they are used in situations where it is impractical or inappropriate to use spot detectors. Example applications are aircraft hangers, historic buildings, museums, manufacturing plants, petrochemical plants and warehouses.