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F-14 horizontal stabilators missing anhedral


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The real F-14 had a few degrees on anhedral (downward cant) on its horizontal stabilators. I have read this was done to increase control authority. The stabilator should match the slight anhedral of the wing when the wing is fully swept back, and almost (but not quite) makes a right angle when measured against its respective vertical tail.

 

The Heatblur model does not appear to have this modelled correctly.

 

Here are some great examples showing this:

 

6a47881361ba145f872b5f0560ec5a7b.jpg

 

0fe3edada7689d68a2bf79150a6f32c1.jpg

 

454b99df972902c3126a68200db59e0b.jpg

 

24dea4c32705fece862b4740e32685b8.jpg

 

e281f5108151bbc0bd477d8542781a7a.jpg

 

I have seen many 3-view drawings, models, and renderings that were done incorrectly based off of an illusion when looking at the real Tomcat. When viewed head on, if the stab is pitched back just slightly (4-6 degrees nose up), the shape of the control surface makes it look like it does not have anhedral as demonstrated in this photo:

 

3299d96550204a608b8bdf1656109749.jpg

 

This drawing appears to be fairly accurate:

 

13784c33d999af2fa05c22b004d5f1c2.png


Edited by mtpiperpilot
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Can you add some DCS screenshots to illustrate your point? Maybe a side-by-side?


Edited by Spiceman

Former USN Avionics Tech

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Heatblur Tomcat SME

 

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That's a good idea.

 

I tried to match the zoom and angle of some of these photos...and they're not perfect, but I think they still illustrate the problem.

 

I believe this has already been brought to their attention, with how slow everything else is going for HB I think you’ll find this won’t be getting fixed.

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That's a good idea.

 

I tried to match the zoom and angle of some of these photos...and they're not perfect, but I think they still illustrate the problem.

 

NASA-TM-83250

NASA-TN-D-7817

NASA-TM-X-2947

3.5 degrees

IMG_20200810_225724.thumb.JPG.a1fb5eb602776a403e09ea22ac981ae6.JPG


Edited by FWind
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That's a good idea.

 

I tried to match the zoom and angle of some of these photos...and they're not perfect, but I think they still illustrate the problem.

 

VERY compelling evidence, and kudos getting the screen grabs matching the photos.

Definitely a mismatch between sim, and the real bird.

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NASA-TM-83250

NASA-TN-D-7817

NASA-TM-X-2947

3.5 degrees

[ATTACH]244530[/ATTACH]

 

Very good detective work, FWind! :thumbup:

 

3.5 degrees anhedral sounds and looks right!

 

I sure hope that Heatblur has a chance to correct the model. It might be subtle, but it's very distinctively "Tomcat" geometry. Granted, I'm no DCS aircraft maker, but it seems like it would be pretty easy to fix.

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VERY compelling evidence, and kudos getting the screen grabs matching the photos.

Definitely a mismatch between sim, and the real bird.

 

Thanks Gary! It's funny....it's just one of those things that stuck in my mind from seeing Tomcats at airshows; the slight droop of the the stabs. I immediately noticed it missing when I first saw the HB Cat.


Edited by mtpiperpilot
Fixed typo
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Thanks Gary! It's funny....it's just one of those things that stuck in my mind from seeing Tomcats at airshows; the slight droop of the the stabs. I immediately noticed it missing when I first saw the HB Cat.

 

I’ve had the HB -14 for a while now, but never noticed it. :doh:

Then again, I’m mostly in cockpit only. Good catch bud. :thumbup:

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:thumbup:

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Very good detective work, FWind! :thumbup:

 

3.5 degrees anhedral sounds and looks right!

 

I sure hope that Heatblur has a chance to correct the model. It might be subtle, but it's very distinctively "Tomcat" geometry. Granted, I'm no DCS aircraft maker, but it seems like it would be pretty easy to fix.

 

NASA-TM-X-2555

NASA-TP-2769

20200815211511.thumb.png.1e2c9ad40171e1c5d253bb0fcec863cc.png

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  • 1 month later...
  • 3 months later...
2 hours ago, Elefant1301 said:

Same question than above. 

 

The anhedral was corrected a couple months ago chap, not long after my last post here.
Its as it should be now.

  • Like 1

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