General Category > Unofficial F/A-18 Acceleration Pack board

HUD Calibration

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thomasnc41:
Is the calibration done while flying flat and level at a certain altitude of can it be done at anytime during the flight or approach?  Sorry its taking me so long to grasp this but I just don't understand what is taking place.


Thanks again,  Tom

virtuali:
This is better done when sitting on ground.

thomasnc41:
virtuali,

Thanks for the quick responses.  I'm still missing something.  Would it possible for you to set your Hornet at KILM RWY6 with the correct calibration
set and do a screen capture, then post the photo so I can see it?

I do understand most of the avionics on the the FA/18 but this calibration adjustment is not coming to me and I really would like to understand.  I somewhat obsessed with this airplane. 

Again Thanks, Tom

islandjet:
The calibration is all relative. At different airspeeds the aircraft flies level at different angle of attack (or alpha). You should be in straight and level flight to calibrate. Then the HUD is calibrated for THAT cruise attitude (and power setting) only. Hence whenever you do a maneuver, you simply return the HUD to the calibrated zero and you will be straight and level again.

It’s all relative as calibrated zero will change depending on your power setting (hence it being adjustable) and it’s really not a big deal. Most real world aircrafts have this including trainer Cessna 172s

The one time you should NOT calibrate is when you are sitting on the ground. This is because the aircraft sits with a nose down attitude and hence not really level.

-iJ

virtuali:
In our case, the HUD calibration is only done to allow for pilots of different heights! In real life you would have change the pilot's seat height to match some reference points for the HUD. Since in FS we can simulate pilots with different heights ( or seat height adjustment ) by using the keys to move the eyeposition up/down, the HUD calibration was put there as a compensating factor.

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