What is the speed of sound at sea level according to ISA?

What is the speed of sound at sea level according to ISA?

662 kts

Local speed of sound = 39 x √(Temperature in Kelvin)

15°C in Kelvin is (15 + 273) = 288

So the local speed of sound = 39 x √288 = 662 kts

What is an MCP and what is an FMA?

What is an MCP and what is an FMA?

The mode control panel is used to select the autothrottle, autopilot, and flight director operating modes. The flight mode annunciator displays current flight modes.

What are the lift qualities of a swept wing?

What are the lift qualities of a swept wing?

Poor, because the sweep-back design has the effect of reducing the lift capabilities of the wing.

What is the range of a VOR?

What is the range of a VOR?

VOR stations are fairly short range: the signals are line of sight between transmitter and receiver and are useful for up to 200 miles.

Each station broadcasts a VHF radio composite signal including the navigation signal, station's identifier and voice, if so equipped.

Would you be happy if VMCG is higher than V1?

Would you be happy if VMCG is higher than V1?

No, because if your critical engine fails at V1 you have to continue your takeoff roll, but because you’re under VMCG you are unable to maintain directional control.

Explain the Fohn wind.

Explain the Fohn wind.

A Fohn wind is a warm dry wind that blows down the lee side of a mountain.

Initially, the air temperature cools dry-adiabatically (3°C/1000 ft), until its dew point temperature is reached. Condensation occurs as the air is further forced up the mountain range, resulting in the air cooling saturated-adiabatically (generally considered in the mid-latitudes to be 1.8°C/1000 ft). Clouds and precipitation form. When the air mass reaches the top of the mountain range it has lost a significant amount of its water content and so has a much lower dew point temperature.

As the air then begins to descend down the lee slope of the mountain the compressed air is initially heated saturated-adiabatically, and in effect the direct reverse to the cooling effect on the windward side occurs. As the air continues leeward and downward from the mountain range, the air, now no longer saturated, is heated dry-adiabatically.

The resultant wind is dry and warm giving clear conditions at airfields on the lee side of the mountain range.

The Foehn Effect also may be associated with mountain wave activity.

What is the typical range of an NDB?

What is the typical range of an NDB?

Average range over land 20 - 25 miles.

Range for an NDB can be calculated with:

2√power output in Watts = Range (Land) 3√ power output in Watts = Range (Water)

Why would someone fly a Rhumb Line track?

Why would someone fly a Rhumb Line track?

  • If no IRS/INS/GPS was available, it’s easier to fly a constant heading (but you will need to apply variation).

  • If flying over short distances (as done during your training) the error introduced by flying a rhumb line is insi

You are flying in a straight line on an airway when your company calls and requests you to return to base, what will you do first?

You are flying in a straight line on an airway when your company calls and requests you to return to base, what will you do first?

Inform ATC.

What is the range of a VOR at 32000ft?

What is the range of a VOR at 32000ft?

Range = 1.23(√H1 + √H2)

= 1.23 * √32000

= 220 nm

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