Upgrade your account to a Community Supporter account and remove most of the site ads.

Reply to thread

Message: <blockquote data-quote="Cleon" data-source="post: 8561322" data-attributes="member: 57383">Further on that, how much would a creature that shape likely weigh? That'd confirm whether those dimensions are right for a Large beast.A Giant Brittle Star ought to weigh about the same as a half-size (3-foot across) flattened beholder with 20-foot constrictor snakes strapped to it. There arms are comparable in shape to serpents, after all!Let's see, if the body is a spheroid 3 foot across and 18 inches thick and its five arms are cones 20 foot long and 9 inches in diameter at the base, then its volume is:Body = 4/3π×1½×1½×¾ = 2.25π = 7.0686 cubic feetArms = 5×⅓π×⅜×⅜×20 = 4.6875π = 14.726 cubic feetTotal = Body + Arms = 6.9375π = 21.795 cubic feetNow it's going to have the same density as water like most aquatic animals, which is roughly 62.5 pounds per cubic foot.So if the above volumetrics were accurate, it ought to weigh about 1362 pounds in total, and each arm weighs roughly 184 pounds (as they have a volume of 2.94 cubic feet apiece). That sounds about right, as a 20 foot long <a href="https://en.wikipedia.org/wiki/Reticulated_python" target="_blank">Reticulated Python</a> can weigh less than that.That's a pretty reasonable weight for a Large sized creature, since Large is roughly as big as a horse. In 3E a Large creature is usually in a range from 500 to 4,000 pounds, and 5E seems to use a similar size scale so the weights might be about the same.Besides, it leaves room for the disc to be a bit bigger and the arms a trifle thicker or longer and still be lighter than a Rhinoceros, which is also Large.For example, if we make the disc four feet across its volume becomes 4π instead of 2.25π, increasing the total weight to 1,706 pounds; make the 4 ft. disc two feet thick and it becomes 5⅓π and 1,967 pounds (or about a short ton). If we make the arms thicker, say a foot at the base, and that'd weigh about 327 pounds each, the weight of an big <a href="https://en.wikipedia.org/wiki/Eunectes_murinus" target="_blank">Green Anaconda</a>.So I can see these creatures easily weighing 1,400 to 3,000 pounds or so assuming they have discs 3 to 4 feet across and arms 20 to 25 feet long.</blockquote>

Verification