ALT

The altimeter is subject to static pressure error. This error varies according to:

• ATAS and altimeter setting.
• BTAS and OAT.
• CAngle of attack and OAT.
• DTAS and angle of attack

The altimeter is subject to static pressure error. This error results from:

• AIncorrect pressure sensing caused by disturbance of airflow around the static ports,
• BImperfect elasticity of the aneroid capsule.
• CFriction inside the instruments.
• DCabin pressure slightly lower than outside air pressure due to airflow over the fuselage.

The servo-assisted altimeter is more accurate than a simple altimeter because the small movements of:

• AThe pointers are detected by a very sensitive electro-magnetic pick-off.
• BThe capsules are detected by a very sensitive electro-magnetic pick-off.
• CThe capsules are not taken into account.
• DThe capsules are inhibited.