Radar Altimeter Issues?

[hughesj2]

Hi Guys,

 

From watching footage of the RALT when the aircraft is on the deck it reads 10 or 20, presumably because of the height of the sensors above the ground? Ours reads 0?

 

Also the RALT doesn't seem to be affected by bank angle or roll as the Mirage is, again due to sensor limitations. Is the AV-8B system more advanced somehow or are limitations just WIP?

 

Cheers

James

[ChickenSim]

The AV-8B's radar altimeter isn't a laser beam through the yaw axis of the airplane, it's effective within ±45° of pitch and roll and ≤5,000 feet AGL.

 

It provides the distance to the strongest return in that cone, which is usually (but not always) the nearest return to the aircraft (the ground directly below the aircraft as if it were in level flight).

 

The higher the bank angles and altitudes, the more potential error you introduce, and anything beyond these limitations is considered invalid. When you exceed those limits and get an invalid return it should automatically switch to barometric altitude (flashing B) until you get another valid return.

Edited December 20, 2017 by ChickenSim

[hughesj2]

The AV-8B's radar altimeter isn't a laser beam through the yaw axis of the airplane, it's effective within ±45° of pitch and roll and ≤5,000 feet AGL.

 

It provides the distance to the strongest return in that cone, which is usually (but not always) the nearest return to the aircraft (the ground directly below the aircraft as if it were in level flight).

 

The higher the bank angles and altitudes, the more potential error you introduce, and anything beyond these limitations is considered invalid. When you exceed those limits and get an invalid return it should automatically switch to barometric altitude (flashing B) until you get another valid return.

 

Yeah that's the 2nd issue, roll the harrier onto its back and you still get an RALT reading. So based on what you've quoted it's bugged/WIP

 

Cheers

James