5.5-7.5 ton adult or near adult T.rex vs. 4-6 ton near Ankylosaurus
Forget flipping the Ankylosaurus over. Note: an Ankylosaurus tail is only good for sweeping side to side NOT up and down and the tail is stiff Not flexible
Try this senerio: Little chance of injury to the T. rex, except a few shed teeth
(1) T. ambushes A. Appearing out of nowhere noisy and displaying its toothy jaws of death, allows T. to pick the situation and surprises A. to the max!
a.) If T. doesn't do this right, T. simply avoids the tail club and walks away. There will be another time.
(2) A. reponds by naturally hunkering on down to provide maximum defense.
However by doing this A. has minimized its maneuverability and club effectiveness
(3) T. avoids A.'s club tail which in affect is not of much use at this time and steps down (applies about 2 tons of weight) on the lower back or hips of A. thus immobilizing the victim even further.
a.) If A. manages to brake free or fight back then T. just follows the plan as described in (1a)
(4) T. now goes to work NOT on the head, neck or any of the well armoured bits, but the base of the stiff immobilized tail. T. delivers a bone crushing septic bite, neutralizing or dismembering the club and patiently waits still holding down A. to bleed to death.
(5) Dinner is served, just push, roll or eat around the carcass.
Note: no need for help a single T rex can take down an Ankylosaurus by itself...if T rex is part of a group just imagine the response it will received from its fellow T rexes.
On March 30, 2021 at 10:28 PM "Yazbeck, Thomas" <yazbeckt@msu.edu> wrote:
If tyrannosaurs were gregarious, perhaps a group of them harassing an ankylosaur could somehow overcome the armor and movement of the prey. Maybe a dug-in ankylosaur could be dug out by tyrannosaurs - would their feet be capable of scraping dirt?
Thomas Yazbeck
From: dinosaur-l-request@mymaillists.usc.edu <dinosaur-l-request@mymaillists.usc.edu> on behalf of Poekilopleuron <dinosaurtom2015@seznam.cz>
Sent: Tuesday, March 30, 2021 9:12 AM
To: Martin BÃker <martin.baeker@tu-bs.de>
Cc: dinosaur-l@usc.edu <dinosaur-l@usc.edu>
Subject: Re: [dinosaur] Turning ankylosaur over on its backThank you for interesting informations. So what do you suggest T. rex did when trying to take down an adult, grown ankylosaurus? Tom
---------- PÅvodnà e-mail ----------
Od: Martin BÃker <martin.baeker@tu-bs.de>
Komu: Poekilopleuron <dinosaurtom2015@seznam.cz>
Datum: 30. 3. 2021 14:02:37
PÅedmÄt: Re: [dinosaur] Turning ankylosaur over on its back
It seems no one has taken this on so I'll give it my 2 cents:
The maximum force a T.rex could exert with his legs was limited.
Simulations I did a looong time ago showed that a plausible maximum
force when standing on one leg is 1.5 body masses.
https://www.tandfonline.com/doi/abs/10.1671/039.029.0213
To turn over an Ankylosaur with a hind foot, the T. rex would have to
stand on one leg and this leg would have to bear the mass of the T. rex
plus the turning force; it seems implausible that this could be
possible.
From a pure force point of view, things might look better when using
the mouth since both legs would then bear the force, but in order not
to opple over one leg would have to placed far forward, the other far
backward, which would readuce the maximum muscle force.
With a smaller Ankylosaur, I would think it might be possible, but I
doubt it is feasible with an 8-ton animal, especially since I would not
expect the ankylosaur to hold still while the T. rex looks for the
optimum lever arm position...
Disclaimer: I did not do any calculations to back this up, it is
based mainly on my physics intuition.
On Fri, 26 Mar 2021 07:03:48 +0100 (CET)
Poekilopleuron <dinosaurtom2015@seznam.cz> wrote:
> Good day!
>
>
>
>
> I was wondering if it is still plausible scenario that an adult
> ankylosaur could be turned on its back by a hind foot or a head of a
> large theropod? Are there any biomechanical studies about how big a
> force must be invested in order to turn say 8 ton _Ankylosaurus
> magniventris_ over? Thank you in advance! Tom
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