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*sausophrey actually isn't an ancestor of this, but the flight method is the same so yeah

QUOTE (Coolsteph @ Oct 9 2022, 11:36 PM)

Putting "A166" on the tail makes it seem lik a natural marking, particularly since "A166" is so stylized

Wow, I didn't even notice it was the A166. I thought it was just a marking, took me reading this to realize it had letters and numbers.

So is the grashof loop a virtual link based on keeping a hamstring muscle contracted, or is it not a virtual link but a literal attachment between the hamstring area and the heel of the cannon bone?

If it's a literal attachment point could it not be tough fascia that prevents the full extension of the limb, like a tether?

I'm very tired right now so I may not be really grasping what's meant here.

https://youtu.be/h8bz4ni6mdY

Here's a video on a four bar system for observers who want to see moving examples.


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Ooh wait it's attached at the hip ..


This post has been edited by colddigger: Oct 24 2022, 11:32 PM

Would this arrangement of muscle, attaching two thirds down the length of the bone and originating as that hamstring muscle, allow for the movement desired?
Since apparently there's a tendon along the back quarter end of the bone.






I also wonder about just extending the attachment point for that tendon out which would pull the tendon further down the bone and open up more of the back of the bone for other muscles to attach.

@Jarlaxle Is this still being worked on?

Yes

https://youtube.com/shorts/7hrzllpQHJA?feature=share

Here's a spatial crank rocker mechanism, just need the four bar attachment on the single planar moving part and less sliding.

What gets me though is still how do Saucebacks twist their legs.

Nice.



The grashof loop could be tough sinew which really could attach wherever you want if muscle wouldn't work. Or even an intense ring of fascia. Fascia would be even easier since that just gets everywhere.

Edit: looks like I had already suggested that

This post has been edited by colddigger: Jan 2 2023, 01:23 PM

How is that working without a solid piece there, exactly?

The rotation is making this hard to parse, is the knee bending sideways in this species?

Unfortunately there's no elastic material option, but this has the same affect: Since it's being pulled but doesn't need to push, the grashof loop only needs to provide a constraint. Generally the loop has to be tough but not hard - it's basically functions as a rope -but thicker layers of fascia would probably help prevent injury while still allowing the wider part to function as a muscle.


The joint doing most of the contortion is the ankle (the knee is the joint between the red & blue bars). In a real organic structure there would be a bit of swivel for the structure as a whole so the contortion wouldn't seem as bad, still a wide range but it wouldn't look as robotic and isolated as… Well, robovisor.

This post has been edited by Jarlaxle: Jan 2 2023, 03:03 PM

Can sauceback ankles contort in that manner? @Evolutionincarnate

Honestly limbs should be able to twist, like just as a standard motion.

They must, how would the interbiat be able to fly if they didn't?

Sauceback yoga:
https://www.youtube.com/watch?v=FP7e5iqwfJc


This post has been edited by Jarlaxle: Jan 2 2023, 05:27 PM

The rotation of the wing occurs at the hip in other species. If I'm understanding your diagram correctly I'm seeing a hinge joint bend a full 180° sideways. If I'm not understanding your diagram correctly, you need to improve it so I can.