Term
| Altimeter hands represent... |
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Definition
By length...
Shortest (thin one) is 10k'.
Medium (fat hand) is 1k feet.
Longest one is 100s of feet. |
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Term
| Pitot system provides ____ for which instrument(s)? |
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Definition
Impact pressure.
Airspeed indicator only. The altimeter and VSI are connected only to the static system. |
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Term
| Attitude Indicator is adjusted with the knob by manually aligning the… |
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Definition
| Miniature airplane to the horizon bar, not vise versa. |
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Term
| Air Data Computer (ADC) has inputs from... |
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Definition
Pitot Tube
Static Port
Temperature |
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Term
| Attitude and Heading Reference System (AHRS) – What does it use / house? |
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Definition
| Uses accelerometers rather than gyros (so no gyroscopic procession / adjustments), and also houses a magnetometer re magnetic heading |
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Term
| Number of Satellites required for 3-dimensional position (lat, long, alt) and time? |
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Definition
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Term
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Definition
| Magnetized iron or electrical systems WITHIN the aircraft |
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Term
| Compass turns - Watch out for... |
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Definition
NO SE (as in “I don’t know”) N.O. means
North Opposite – When flying generally to the north, the compass will error in the direction opposite of the turn itself.
South Exaggerated - Southerly headings result in compass readings in the correct direction, but exaggerated.
East or West – No heading errors. |
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Term
| Compass - Accelerate / Decelerate - Watch out for... |
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Definition
ANDS = Accelerate North (compass reading shows turn to the north). Decelerate South
West / East only. No errors on northerly or southerly headings. |
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Term
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Definition
| Simply what the altimeter is reading |
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Term
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Definition
| MSL, the actual elevation above mean sea level (T in True is close to the S in Sea) |
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Term
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Definition
| AGL, the vertical distance of the aircraft above the terrain over which it is flying (think Absolute = the A in AGL) |
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Term
| Pressure altitude is what 2 things? |
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Definition
What the altimeter would read if set to standard pressure, 29.92
Height above the standard datum plane. |
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Term
| Adage that applies to flying from one region to another, relating to both PRESSURE and TEMPS |
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Definition
High to Low, Look out below / Low to High, Clear the sky
When we fly from a HIGH TEMP, or HIGH PRESSURE area to a LOW TEMP, or LOW PRESSURE area our aircraft will be lower than what it indicates if we do not change the setting on our altimeter. |
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Term
| 1000’ of climb = what change in pressure? |
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Definition
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Term
| Pressure altitude can be found in the cockpit by… |
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Definition
| Setting the pressure scale dial to standard barometric pressure of 29.92, and reading the altitude indicated by the hands. |
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Term
| Altimeter dial setting – Turning the dial higher results in hands moving in what direction, and by how much? |
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Definition
Turning the dial higher results in the hands reading a higher #s, i.e. a higher indicated altitude, and at...
1,000' per 1", or 100’ per every 1/10 an inch (i.e. 29.15 to 29.85 = 700’ increase in indicated altitude) |
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Term
| Compass errors - Accelerate / Decelerate |
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Definition
ANDS =
Accelerate - North (compass reading shows turn to the north).
Decelerate - South
West / East only. No errors on northerly or southerly headings. |
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Term
| When would pressure altitude equal true altitude? |
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Definition
| When standard atmospheric conditions exist |
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Term
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Definition
| IAS is the reading obtained from the airspeed indicator, uncorrected. |
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Term
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Definition
| CAS is IAS corrected for installation and instrument error. |
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Term
True Airspeed –
Definition.
When will IAS match TAP?
Reason for the difference?
Rules of thumb re the difference, i.e. for a given {IAS/TAS}, the {IAS/TAS}, will {increases / decrease} with increasing altitude? |
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Definition
| TAS is the true speed at which the aircraft is moving through the air. The airspeed indicator is calibrated to indicate TAS only at sea level AND under standard atmospheric conditions (29.92" / 1013.2 hPa & 15°C / 59°F). Because air density decreases with an increase in altitude, the aircraft must be flown faster at higher altitudes to cause the same pressure differential between pitot impact pressure and static pressure. Therefore, as altitude increases, for a given TAS, the IAS decreases , and for a given IAS, the TAS increases. (Mnemonic: Given __, then use alphabetical order, so to get from a Tas to Ias, it’s an alphabetical DECREASE with increasing altitude, and vice versa |
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