- Industry: Aviation
- Number of terms: 16387
- Number of blossaries: 0
- Company Profile:
Aviation Supplies & Academics, Inc. (ASA) develops and markets aviation supplies, software, and books for pilots, flight instructors, flight engineers, airline professionals, air traffic controllers, flight attendants, aviation technicians and enthusiasts. Established in 1947, ASA also provides ...
An engine-driven air pump that uses carbon vanes, rather than steel vanes.
Dry-type pumps require no lubrication, but the vanes are extremely susceptible to damage from solid airborne particles. These pumps must therefore be operated with filters in their inlet.
Industry:Aviation
An engine-driven air pump which uses steel vanes lubricated with engine oil drawn into the pump through holes in the base. The oil passes through the pump, where it seals and lubricates, and is then exhausted with the air. Wet-type pumps must have oil separators in their discharge line to trap the oil and return it to the engine crankcase.
Industry:Aviation
An enlarged annulus around the discharge nozzle of some float-type carburetors. The acceleration well fills with fuel when the engine is idling, and when the throttle is suddenly opened, this additional fuel discharges into the engine through the main discharge nozzle.
Industry:Aviation
An enlarged area in a casting or machined part. A boss provides additional material to strengthen the part where holes are drilled for mounting or attaching parts.
Industry:Aviation
An entry into an airport traffic pattern by intercepting the extended runway center line without executing any other portion of the traffic pattern.
Industry:Aviation
An envelope drawn on a graph included in aircraft Type Certificate Data Sheets and aircraft flight operations manuals showing the center of gravity limits for all weights up to the maximum allowable gross weight of the aircraft.
Any combination of weight and center of gravity location that falls within the envelope is an approved loading condition for the aircraft.
Industry:Aviation
An error in any of the instruments connected to the aircraft static air system, caused by the static air source not being located in an area in which the air is absolutely still (static). Installation error affects the airspeed indicator, altimeter, and vertical speed indicator, and it changes as the angle of attack of the aircraft changes.
Industry:Aviation
An error in the indication of a magnetic compass that shows up when the aircraft accelerates or decelerates while flying on an easterly or westerly heading.
The float in an aircraft magnetic compass is unbalanced to compensate for the downward pull of the vertical component of the earth’s magnetic field (dip error), and the inertia caused by a change in speed acts on this unbalanced condition.
When the aircraft accelerates on an easterly or westerly heading, the compass indicates that the aircraft is turning to the north, and when it decelerates on either of these headings, the compass indicates that the aircraft is turning to the south.
Industry:Aviation
An error in the indication of a magnetic compass, caused by local magnetic fields within the aircraft. Deviation error, which is different on each heading, is minimized by the technician compensating, or swinging, the compass.
A compass must be compensated so the deviation error on any heading is no greater than 10 degrees.
Industry:Aviation
An error in the indication of flight instruments connected to the static air system (altimeter, airspeed indicator, and vertical speed indicator). This error is caused by the air at the entrance to the static system not being absolutely still. The amount of position error changes with the angle of attack or airspeed of the aircraft and is usually greatest at low airspeeds when the angle of attack is the highest.
Industry:Aviation
