Hud Symbols Nadir And Steerpoint Cue

[mangold 0]

HUD symbols Nadir and Steerpoint Cue.(Tadpole): both symbols show an own pointer

Given switches on HUD Remote Control Panel are set correctly, Steerpoint Cue pointer directs to the next steerpoint(s) as filed in Sim Flightplanner..

Just turn aircraft until Steerpoint Cue pointer points to aircraft nose. Then keep Flight Path Marker over Cue

Some miles prior steerpoint passage (leadpoint), the pointer switches to next steerpoint.

If Flightplanner contains only one steerpoint then after passage pointer switches to a kind of wingtip position and is'nt usable any more

When approaching high, an additional diamond gives pitch info to establish a glidepath into the steerpoint (not to be mixed with ILS glidepath)

The HUD Nadir Symbol helps to establish a perpendicular dive.

How to interpret the little Nadir pointer?

In case you want to pull out of dive IN DIRECTION to next steerpoint it is inadequate just to turn aircraft until Steerpoint Cue pointer points to aircraft nose because aircraft nose is pointing to ground.during a perpendicular dive

Therefore ROLL aircraft until Nadir pointer points same direction as Steerpoint Cue pointer .After pull out you are inbound next steerpoint.(or below ground:)

Two pictures show HUD symbols before and after rolling aircraft

Is there any other use/meaning for Nadir pointer? ping Saprintz

mangold, an enthuiastic AS F-16 HUD aficionado

[saprintz 82]

HUD symbols Nadir and Steerpoint Cue.(Tadpole): both symbols show an own pointer

Given switches on HUD Remote Control Panel are set correctly, Steerpoint Cue pointer directs to the next steerpoint(s) as filed in Sim Flightplanner..

Just turn aircraft until Steerpoint Cue pointer points to aircraft nose. Then keep Flight Path Marker over Cue

Some miles prior steerpoint passage (leadpoint), the pointer switches to next steerpoint.

If Flightplanner contains only one steerpoint then after passage pointer switches to a kind of wingtip position and is'nt usable any more

When approaching high, an additional diamond gives pitch info to establish a glidepath into the steerpoint (not to be mixed with ILS glidepath)

The HUD Nadir Symbol helps to establish a perpendicular dive.

How to interpret the little Nadir pointer?

In case you want to pull out of dive IN DIRECTION to next steerpoint it is inadequate just to turn aircraft until Steerpoint Cue pointer points to aircraft nose because aircraft nose is pointing to ground.during a perpendicular dive

Therefore ROLL aircraft until Nadir pointer points same direction as Steerpoint Cue pointer .After pull out you are inbound next steerpoint.(or below ground:)

Two pictures show HUD symbols before and after rolling aircraft

Is there any other use/meaning for Nadir pointer? ping Saprintz

mangold, an enthuiastic AS F-16 HUD aficionado

Hi mangold. No, there is no other use for the nadir pointer in this version of the HUD. It simply points up the centerline of the ladder rungs, on the side of the nadir circle where the actual flight path is. (If that makes sense.) I believe I've seen flight manuals (or maybe it's another aircraft, or I just thought this would've been a good idea??) where that little pointer rotates around the nadir circle so that it gives a top down bearing to north. Not positive about that. But there are no tricks in it.

As to the tadpole, IIRC aircraft roll is taken into account in such a way that you should always pull towards the symbol itself, without regard to where the tadpole is actually pointing. In other words, roll until the top (airplane tail) of the flight path marker points towards the tadpole symbol, and then pull. I think that's how it's set up. It's confusing, both here and in the real F-16, because the tadpole has some elements that are top-down based, like an HSI, i.e., fixed with respect to the vertical of the HUD glass, yet some other of its movement aspects definitely depend upon aircraft attitude. I personally only rely upon the actual direction of the tadpole pointer when I'm at not-so-extreme pitches or rolls.

There is a logic to it all, but it is definitely not the most intuitive HUD symbol ever invented. If you look at some of the F-16 HUD demo videos out there on youtube or whatever, I think (I THINK!! ;-) you'll find that this one operates the same way. If not, let me know, please.

Thanks!

Scott

[mangold 0]

Thanks for reply Saprintz and sorry for late reply.

An aircraft's heading is the direction that the aircraft's nose is pointing. As long as F-16 HUD Nadir is visible AND a/c is rolled heading is displayed. This must be heading the a/c will be on AFTER pull up. (I think in real F-16 INS and computers calculate and display same way)

Since Nadir pointer rotates during roll according with heading indication it must show direction AFTER pull up or as you say "a top down bearing to north"

(a bearing is ordinarily calculated in a clockwise direction starting from a reference direction of 0° and increasing to 359.9 degrees)

As to the tadpole. Wether it is or is not the most intuitive HUD symbol ever invented, I consider your FSX F-16 HUD (Air to Air mode accentuated) a phantastic achievement far superior to FSX Acceleration F-18.

some more questions

a) Sometimes FPM shows flashing x (auto flap/slat operation?) What are complete conditions for FPM x trigger

Radar Hight indication ends 1000´ clean config and 4000' gear down. No idea how real F-16 Radar ALT behaves and what design-philosophy . Do I have chance to change 1000 to 5000 feet ?

c) according http

://oai.dtic.mil/oai/oai?verb=getRecord...fier=ADA260280

F-16 HUD has been modified for zenith/nadir symbols.

Any links (video clips, or manuals) demonstrating/covering these HUD sybols ?

[saprintz 82]

Thanks for reply Saprintz and sorry for late reply.

An aircraft's heading is the direction that the aircraft's nose is pointing. As long as F-16 HUD Nadir is visible AND a/c is rolled heading is displayed. This must be heading the a/c will be on AFTER pull up. (I think in real F-16 INS and computers calculate and display same way)

Since Nadir pointer rotates during roll according with heading indication it must show direction AFTER pull up or as you say "a top down bearing to north"

(a bearing is ordinarily calculated in a

clockwise direction starting from a reference direction of 0° and increasing to 359.9 degrees)

As to the tadpole. Wether it is or is not the most intuitive HUD symbol ever invented, I consider your FSX F-16 HUD (Air to Air mode accentuated) a phantastic achievement far superior to FSX Acceleration F-18.

some more questions

a) Sometimes FPM shows flashing x (auto flap/slat operation?) What are complete conditions for FPM x trigger

Radar Hight indication ends 1000´ clean config and 4000' gear down. No idea how real F-16 Radar ALT behaves and what design-philosophy . Do I have chance to change 1000 to 5000 feet ?

c) according http

://oai.dtic.mil/oai/oai?verb=getRecord...fier=ADA260280

F-16 HUD has been modified for zenith/nadir symbols.

Any links (video clips, or manuals) demonstrating/covering these HUD sybols ?

Hi mangold. I couldn't link to that document you posted, but I found it otherwise. Yes, the modern symbols are the ones used in the Aerosoft F-16. This video:

, or a different version, is the one I used most often, as well as other official resources. It shows the lined nadir and pointer-star symbols. There are several HUD symbol formats out there in different jets, but they're all 90 percent the same.

Your questions:

A) A flashing, X'd out FPM just means that your actual flight path is off the glass. It indicates that the symbol, at that moment, is not a reliable marker of your flight path.

I think it's 1,000 / 5,000 ? It's arbitrary, completely. I'm sure the altitude is selectable in the real jet, but this is one of those things we just never had time to get in. You could change it by going into the XML file.

C)

, as posted above. I have a bunch of other stills somewhere, and will try to dig them up, but no promises. I have not kept my files very organized. (Spend too much time making new things!)

Hope this helps,

Scott

[mangold 0]

Your questions:

A) A flashing, X'd out FPM just means that your actual flight path is off the glass. It indicates that the symbol, at that moment, is not a reliable marker of your flight path.

I think it's 1,000 / 5,000 ? It's arbitrary, completely. I'm sure the altitude is selectable in the real jet, but this is one of those things we just never had time to get in. You could change it by going into the XML file.

C)

, as posted above. I have a bunch of other stills somewhere, and will try to dig them up, but no promises. I have not kept my files very organized. (Spend too much time making new things!)

Hope this helps,

Scott

Guten Tag Scott, thanks for answers.

is mostly looking like your aerosoft F-16 HUD. Admiration !!!

Radar altitude indication up to 5000`in landing config is correct.

I managed to open the XML file. But no idea WHAT to change to get 6000 instead of 1000 with clean configuration. Any help?

Another observation. During ground operations aural "Warning" (Stall) is triggered sometimes. During airborne stalls there is no aural warning, only optical warning .

Exess speed causes optical warning and crash. Aural excess speed warning would be helpfull.

Have set FSX crash tolerances to max.

mangold

[mangold 0]

ping TAFKAM

thanks for your kind offer (private message May.31) concerning this thread.

Hope you received my PM answer. Only reply via aerosoft forum PM came from a judith offering matters of definitly no interest.

Instead I assure beeing still interested in your offer and stand by patiently.

Regards mangold

[iRay 1]

ping TAFKAM

thanks for your kind offer (private message May.31) concerning this thread.

Hope you received my PM answer. Only reply via aerosoft forum PM came from a judith offering matters of definitly no interest.

Instead I assure beeing still interested in your offer and stand by patiently.

Regards mangold

DATA recieved.....hmm so you have being padlocked by Judith as well...

I will send it ASAP!

grts

TAFKAM