Did I break my viggen or was it planed?

[Gunfreak]

I'm going through the first mini campiagn that comes with the Viggen, in mission 2, I'm supposed to scare some Rouskies. I do a flyover of the ships and do a turn to come in to drop the bombs, in the turn a hare a thump, then a few minutes later the hud is gone. I don't know what i did, but in NAV the hud is gone. When I put the master mode to landing, the hud comes back.

[razo+r]

Got a track?

Maybe you got shot?

[Gunfreak]

Don't think the enemy fires at you in this mission. 

No track, as viggen tracks break on take off if not sooner.

[Kite Ryder]

Was it compressor stall thump? Did you get any waring lights?

[Machalot]

18 hours ago, Gunfreak said:

in the turn a hare a thump

I agree with @Kite Ryder, this sounds like a compressor stall.  The HUD has a limited display range; if you pitch up or down more than about 10-15 deg from the horizon, the HUD symbols will not be visible. 

[Gunfreak]

5 hours ago, Machalot said:

I agree with @Kite Ryder, this sounds like a compressor stall.  The HUD has a limited display range; if you pitch up or down more than about 10-15 deg from the horizon, the HUD symbols will not be visible. 

The bang didn't sound like a compressor stall. And a compressor stall shouldn't kill my hud in nav mod permanently?

I had no hud for like 10 minutes until I switched over to landing. 

[razo+r]

Can you try to reproduce it and maybe record a video of it?

[Gunfreak]

52 minutes ago, razo+r said:

Can you try to reproduce it and maybe record a video of it?

I just watched the video, the HUD disapears as I drop some bombs. 

I drop them in "plan/sjö" and "nav" as that's what the mission breifing recommended, and so the HUD disapear just as the drop the bomb(not when the bomb hits, so no damage)

[Machalot]

1 hour ago, Gunfreak said:

I just watched the video, the HUD disapears as I drop some bombs. 

I drop them in "plan/sjö" and "nav" as that's what the mission breifing recommended, and so the HUD disapear just as the drop the bomb(not when the bomb hits, so no damage)

High drag or low drag bombs? 

[Gunfreak]

4 minutes ago, Machalot said:

High drag or low drag bombs? 

Highdrag I think.

Edit yes, Highdrag

Can see it here from 10:30

 

 

Edited August 20, 2022 by Gunfreak

[Machalot]

1 minute ago, Gunfreak said:

Highdrag I think.

Edit yes, Highdrag

 

When you open the trigger safety in NAV mode with high drag bombs, you activate CCIP mode. The HUD displays the CCIP symbols on the ground. If you are too slow, too low, or too high, the CCIP symbols will drop off the button of the HUD because the bombs will impact down there. The HUD symbols will reappear when you close the trigger safety. 

[Gunfreak]

5 minutes ago, Machalot said:

When you open the trigger safety in NAV mode with high drag bombs, you activate CCIP mode. The HUD displays the CCIP symbols on the ground. If you are too slow, too low, or too high, the CCIP symbols will drop off the button of the HUD because the bombs will impact down there. The HUD symbols will reappear when you close the trigger safety. 

Thank you, that explanes it!