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Re: Complaining



Good point - though the arms don't necessarily need to be as strong as the 
legs; they merely need to be capable of bearing full load during the absorption 
phase of the gallop.  For most galloping animals (especially large ones), this 
necessitates that the forelimbs have a similar load bearing capability to the 
hind limbs.  However, it is possible for the hind limbs to be especially robust 
as primary propulsion structures and the forelimbs to be rather weaker but 
still capable of bearing the prerequisite loads.  Lagomorphs are probably the 
most obvious example.

None of that, of course, suggests that hadrosaurs would gallop quadrupedally.  

--Mike H


On Apr 30, 2013, at 9:48 AM, GSP1954@aol.com wrote:

> Only quadrupeds with arms at least almost as strong as the legs can gallop 
> because during part of the cycle the arms alone are bearing load. If the 
> arms are too slender to bear such high loads, as per hadrosaurs, then they 
> can 
> only be used as auxiliary power (adding maybe 10-20%) with the legs bearing 
> most but not all of the load during a trot or pace. No person actually 
> researching hadrosaur locomtion has every proposed galloping in the technical 
> literature, and unless that happens no animator should violate scientific 
> methodology and show it. 
> 
> Elephants can only amble, and cannot exceed 15 mph (measured from frequent 
> races in Asia and recent studies of elephant locomotion). Same for 
> stegosaurs. 
> 
> There are a fair number of skin samples from a variety of sauropods and 
> they all follow the typical dinosaur pattern. Animators should always stick 
> to 
> what is known when it is known, and not engage in speculation that can 
> mislead audiences. The animators were probably just being lazy and did not do 
> the 
> research. 
> 
> GSPaul
> 
> 
> 
> In a message dated 4/29/13 10:16:01 PM, keenir@hotmail.com writes:
> 
> << No way, they trotted or paced using the arms to add some speed 
>> and especially turning agility.
> 
>  how do you propose they use their arms to add speed, if you are arguing 
> that they didn't put their weight on their arms?
> 
>> galloped like flexible backed quad mammals. Stegosaurs trotting when at 
>> most they ambled like elephants.
> 
> Elephants can move pretty fast.
> 
>> The sauropods were walking with absurdly 
>> flexed elbows. The sauropod skin was all wrong. Sort of like 
> crocodilians. Why? 
>> We have samples of sauropod skin.
> 
>  Skin from the same Genera or Family of sauropod?  Its possible that 
> sauropod skin was as diverse as, say the skin of mammals, yes?
> 
>>>> 
> 
> </HTML>