Second VV Marker in Nav mode.

[Zadren]

Hi, could someone please clarify what the second velocity vector marker (without the circle) is depicting when in Nav mode. I have a feeling it's correcting for wind, but I'm not certain. I can't find it in the pocket guide, or Chuck's work. :huh:

 

Thanks in advance :)

[Bersagliere81]

I think it's the wind correction too. If you rudder it, you can align it.

[Repsol2k]

I give u the description according to the AV8B NATOPS - 000

 

Source: https://info.publicintelligence.net/AV-8B-000.pdf

 

Site: 643-645

 

23.16.10 Velocity Vector

The velocity vector provides the pilot with an outside world reference with regard to actual aircraft flight path. The

velocity vector represents the point towards which the aircraft is flying (aircraft flight path). In the NAV master mode,

the velocity vector is always caged to the vertical center line of the HUD. A ghost velocity vector is displayed at the

true velocity vector position if that position is more than 2°from the caged position. The flight path/pitch ladder and

steering information are referenced to the caged position. The ghost velocity vector will flash when limited. The

velocity vector is normally positioned by inertial velocities, derived from either INS or GPS velocities. When these

are invalid, filtered values of ADC TAS and ADC AOA are used to determine all velocities and therefore position

of the velocity vector.

 

 

 

 

 

BUT

 

I dont know if in the discription of the Natops the picture which u see for the Radar and Night Attack Version is correct because there u only have the Ghost velocity vector. Dont know if in the N/A version u only have the ghost vector or if u have both. In the picture of the Day and Training version u have both the Ghost vector and the normal vector.

 

Maybe someone of Razbam can give more information what is right and what is wrong ?

[Zadren]

Ok, thank you. That sort of makes sense. It includes lateral movement of the VV. The follow-on question is though: Should I be merely monitoring this difference in VVs, or trying to counteract it? What do I do with this information?

[MustanGrande]

I think it's there as an alternative to the A-10C system. In the A-10, the entire pitch ladder drifts alongside the TVV, and that can lead to difficulties during crosswind landings. (It's no fun when your ladder and TVV both disappear right off the side of the hud!)

 

The harrier appears to keep the ladder locked in the center, with a TVV centered upon it for pitch reference. The ghost tvv is there to show you where your aircraft is actually heading.

 

At least, that's what I make of it. I may very well be wrong.