Is the low pressure third stage turbine (exhaust) animated in the Viggen?

[JetCat]

Hi pilots,

I have watched some Viggen videos yesternight and think this airplane is very beautyful and stylish-looking. Yes it is old, but one have to remember that the F-16 was also developed in the seventies and the Tomcat development begun in the late sixties, so age says nothing about the beauty and extremestylish look of these jets

Well what I could not see in any of the YouTube videos but what is of interest of me because all Eagle Dynamics jets have this feature, is the correct modelling and animation of the turbine exhaust.

Here we have Col. Yamato, former Japanese mech-pilot, explaining the Viggens Pratt & Whittney JT8 engine:

Is the huge stage III low pressure turbine wheel visible in the turbine´s exhaust animated and turning in the Viggen, or is it only a disappointing static texture when looking into the huge exhaust? I need to know this information before buying because the Heatblur Tomcat also unfortunately has no animated low-pressure turbine exhaust which is disappointing in an otherwise such ultra-hyper-detailled and beautyfully rendered jet with so much attention to detail that even the tiniest bolt and screw inside the cockpit matches with the real thing.

Remember all Eagle Dynamics planes have an animated and turning jet intake fan and a turning low-pressure turbine at the exhaust, even in the F-5 and F-18 (which have very small rather hard to see into the exhaust) but I absolutely appreciate this level of attention to detail.

So can any Viggen user telling me if the exhaust turbine is turning? Thanks in advance for your answers

 

[Bremspropeller]

Why is seeing a turning turbine (that's supposed to turn at a couple of thousand RPM and hence be invisible) so important to you?

If anything, the only thing you're supposed to see are the stator vanes. On both, the compressor and the turbine ends.

[renhanxue]

lmao

I have no idea if it's animated or not, but animating it would just be a pointless waste of resources since you cannot actually see it even on the real aircraft, because the afterburner is in the way. The afterburner is actually considerably bigger than the gas generator, which means that if you're looking into the engine nozzle from the back of the aircraft you're staring down a black tube that's like five meters long, so you can't really see anything in there in the first place. Even if you took a flashlight and shone it down the tube though, basically all you'd be looking at in there is the afterburner diffuser section and specifically the injector plates, which are pretty much the same diameter as the turbine. Here's a photo for reference, and here's a diagram of the engine layout as installed in the aircraft - and keep in mind that behind the nozzle at the back there's the thrust reverser and tail cone assembly as well:

Edited November 2, 2021 by renhanxue

[MYSE1234]

4 hours ago, renhanxue said:

lmao

I have no idea if it's animated or not, but animating it would just be a pointless waste of resources since you cannot actually see it even on the real aircraft, because the afterburner is in the way. The afterburner is actually considerably bigger than the gas generator, which means that if you're looking into the engine nozzle from the back of the aircraft you're staring down a black tube that's like five meters long, so you can't really see anything in there in the first place. Even if you took a flashlight and shone it down the tube though, basically all you'd be looking at in there is the afterburner diffuser section and the injector rings. I'm pretty sure the turbine isn't even visible at all.

 

Indeed little to no point in animating it as it's fairly well hidden. It is visible if you want to see it, but as mentioned above the turbine will not really be visible when spinning, only the stators (being stationary) will be.


(Looking at that image, I'm now very annoyed I didn't center the diffuser cone better in the flame holder..)

Edited November 2, 2021 by MYSE1234

[renhanxue]

Are you referring to the next innermost ring? Are you sure those are actually the turbine blades?

(really cool photo by the way!)

Edited November 2, 2021 by renhanxue

[MYSE1234]

Looks like blades/stators to me.

Edited November 2, 2021 by MYSE1234

[renhanxue]

1 minute ago, MYSE1234 said:

Looks like blades/stators to me.

 

Fair, I agree they do, I just always had the impression that the afterburner injectors had the shape of a plate and would be blocking the view down there. But I'm not sure where I got that idea and it would kinda make more sense to not block the flow that much so I'm probably wrong, actually.

[Machalot]

Why don't you fly it for two weeks under the Free to Play program and see for yourself if you are satisfied with the detail of the animations?

[Amarok_73]

16 hours ago, renhanxue said:

keep in mind that behind the nozzle at the back there's the thrust reverser and tail cone assembly as well

You forgot to highlight, that they're... ANIMATED!