How do you prevent an aircraft reaching Mcrit?
How do you prevent an aircraft reaching Mcrit?
Decreasing speed, by reducing engine power or pitching up.
What pressure does a pitot tube measure?
What pressure does a pitot tube measure?
The total pressure (static and dynamic pressure).
If turboprops are more efficient aircraft, why do they not climb that high?
If turboprops are more efficient aircraft, why do they not climb that high?
Jet engines are designed to achieve their best specific fuel consumption at high rpm, which can only be achieved at high altitudes where the air density is low.
Thrust produced will be low enough to equal the required cruising thrust. Also high altitude gives the best operating conditions for the airframe i.e. minimum drag during the cruise.
Turboprops need relatively dense air for the propellers to work efficiently and at high altitude the density would be too low.
How does an IRS work?
How does an IRS work?
An IRS is an Inertial Reference System which consists of accelerometers, gyroscopes (laser) and a position computer.
The computer calculates the aircrafts position by direction and velocity sensed by the accelerometers from the initial latitude and longitude input.
An IRS enables the aircraft to fly great circle tracks and to navigate accurately across vast expanses where no ground based navigation aids are available.
What is the environmental lapse rate according to ISA?
What is the environmental lapse rate according to ISA?
1.98°C per 1000ft
Why is a great circle the shortest distance between two points?
Why is a great circle the shortest distance between two points?
The track changes constantly.
Can you explain to me what Mach tuck is?
Can you explain to me what Mach tuck is?
Mach tuck is a nose-down pitching moment experienced as an aircraft passes Mcrit.
Mach tuck is a form of longitudinal instability that is caused by the centre of pressures rearward movement (caused by the shock wave) behind the centre of gravity.
What is a Rhumb Line?
What is a Rhumb Line?
A line across the surface of the earth that cuts all meridians at the same angle. i.e. a track of constant direction.
A straight line on a Mercator chart.
What is a VOR? What frequency range and band is it in?
What is a VOR? What frequency range and band is it in?
VHF Omnidirectional Radio Range (VOR) is defined as VHF Omnidirectional Radio Range, an aircraft navigation system operating in the VHF band.
VOR's are assigned radio channels between 108.0 MHz and 117.95 MHz (with 50 kHz spacing); this is in the very high frequency (VHF) range.
What is MDA?
What is MDA?
Minimum decent altitude (non-precision), the lowest altitude, expressed in feet above mean sea level to which descent is authorised on final approach or during circle-to-land maneuvering in execution of a standard instrument approach procedure where no electronic glideslope is provided.
If not visual between MDA and MAPt, a Go-around must be initiated.