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CrazyCat138 (talk | contribs) →Fabrication: source doesn't seem to show any preference to wolf spiders over other spiders |
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The main appeal of the spider's body in necrobotics is its compact leg mechanism and use of hydraulic pressure.<ref name=":2">{{Citation |title=Spider anatomy |date=2023-07-20 |url=https://en.wikipedia.org/w/index.php?title=Spider_anatomy&oldid=1166225476 |work=Wikipedia |access-date=2023-10-19 |language=en}}</ref><ref name=":4">{{Cite web |title=Leg Uses Hydraulics and Muscle Flex — Biological Strategy — AskNature |url=https://asknature.org/strategy/leg-uses-hydraulics-and-muscle-flex/ |access-date=2023-11-04 |website=asknature.org |language=en-US}}</ref> The spider's anatomy utilizes a simple [[Hydraulics|hydraulic]] (fluid) pressure system. Spider legs have flexor muscles that naturally constrict their legs when relaxed.<ref name="10.1002/advs.202201174"/><ref name=":4" /> A force is required to straighten and extend their legs, which spiders accomplish by pumping hemolymph fluid (blood) through their joints as a means of hydraulic pressure.<ref name=":1" /><ref name=":4" /> It takes no external power to curl their legs due to their flexor muscles' natural curled state.<ref name="10.1002/advs.202201174"/>
In July 2022, researchers in the Preston Innovation Lab at Rice University published a paper detailing their experiments with the gripper. Although dead spiders no longer produce hemolymph, Te Faye Yap (lead author and mechanical engineering graduate) found that pumping air through a needle into the spider's [[Spider anatomy|cephalothorax]] (main body) accomplishes the same results as hemolymph.<ref name="10.1002/advs.202201174"/> The original hydraulic (fluid) system is essentially converted into a pneumatic (air) system.
== Fabrication ==
# Obtain a spider
# Euthanize the spider using a cold temperature of around -4°C for 5-7 days
# Insert a 25 gauge hypodermic needle into the spider's cephalothorax (main body)
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== Constraints ==
{{Original research|
With the usage of organic material, there is a higher chance of the component decomposing and breaking down as opposed to traditional mechanical systems. There may be additional work and management required to replace these grippers if they fail. Additionally, organic inconsistencies with the spiders will yield inaccurate results. Not all wolf spiders develop the same, so gripping force and leg contraction can vary between grippers.
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