Pneumatic systems Flashcards
Light aircraft often use pneumatics for what?
to power gyroscopes and provide cabin heating
What would you expect to power the de-icing boots on a light twin
Light twins used pneumatics to inflate de-icing boots
Common uses for pneumatics on an aircraft
Operating air driven gyroscopic instruments
Heating and cooling cockpit, cabin and cargo
Pressurisation
De-ice and anti-ice
Emergency back-up
Inflating cabin door seals
Pressurising hydraulic reservoirs.
Other pneumatic uses:
Gas turbine engine starting and operation of thrust reverse
Rain repelling nozzles on the windscreen
Water tank pressurisation
Toilet system pressurisation
Sensing the conditions around the aircraft.
Where would you find a dry pump?
In the pneumatic system
What is the name for the pneumatic system on a large commercial aircaraft?
Bleed air
Name some components of a pneumatic system.
Ducts
Isolation valve
pressure reducing valve
temperature sensors
pressure sensors
Engine bleed air is very hot, how is it cooled?
Pre-cooler then engine bleed valves
Engine bleed air is very hot, how hot?
400°
Fracture of a duct can cause hot gas leaks and could result in serious systems and structural damage, what is done about this?
Backed up temperature sensors
What warning’s are available for the pneumatic system?
Over-temp
over-pressure
low pressure
overheat/duct leak
What position should the bleeds be in for engine start?
Off
Describe the bleed air at high power settings and what is done about it.
Too great so limited.
How is the system monitored?
EFIS
Electronic flight information system
