The Pitot - Static System Flashcards
If no alt static source is available, and the main static vent is blocked, what method can be used allow a static input?
By breaking the VSI glass
Static pressure and dynamic pressure combined is called?
Total pressure, or pitot pressure.
which instruments require dynamic pressure to function?
The ASI and Mach Meter
Pitot pressure = ?
Static pressure + dynamic pressure
Dynamic pressure =
pitot pressure - static pressure
Light aircraft can include a way of obtaining static and dynamic pressure in a cheaper way, this device is called?
Pitot/Static head, it combines static and dynamic pressure in one unit.
Position error, also referred to as pressure error, is caused by?
Changes in aircraft configuration, which can create turbulence around the static vents.
Position error, also referred to as pressure error, can be overcome by?
Removing the static vents from the pitot head and locating them on either side of the fuselage, this arrangement also minimises manoeuvre induced error.
If the static is blocked in a descent:
· VSI will show zero
· Altimeter continues to display the reading at which the blockage occurred
· The IAS will increase
PUDSOD:
Pitot blocked
Underread
Descent
Static blocked
Overread
Descent
When the alternate static source pressure is used, the following instrument indications are observed:
- The altimeter indicates a slightly higher altitude than actual
- The ASI indicates an airspeed greater than the actual airspeed
- The VSI shows a momentary climb and then stabilizes if the altitude is held constant
When the alternate static source pressure is used, the following instrument indications are observed:
- The altimeter indicates a slightly higher altitude than actual
- The ASI indicates an airspeed greater than the actual airspeed
- The VSI shows a momentary climb and then stabilizes if the altitude is held constant
