The prop should be made to weigh very little like 20 pounds, the 2 or 2.5 inch cylinder becomes just and extention of a submersible that does only about 3.5 gallons per minute and the true pressure is probably less than 4 psi. It isn't a hydralic seal so much as displacement of water. If you put a gallon of water in part of a volume that weighs 8 pounds pergallon and at low presures is not compressed it is no different than putting your hand in the tub and pushing it like a puppet.
The 3.5 gallon submersible pumps usually have a 1.5 inch hose and even if it was slow it would be believable rather than being a pop up creature.
If you wanted to pop up the cylinder should be pnuematic and perhaps be in a basin not really submerged in water. Sort of like a trash can terror only stuck in the water.
A still quick but lumbering raising of a creature that does not have a human shape would be more discomforting as it is not easily recongnized for anything other than what it is, an unidentifiable monster moving on its own with no air noise.
The 3.5 gallon submersible pumps usually have a 1.5 inch hose and even if it was slow it would be believable rather than being a pop up creature.
If you wanted to pop up the cylinder should be pnuematic and perhaps be in a basin not really submerged in water. Sort of like a trash can terror only stuck in the water.
A still quick but lumbering raising of a creature that does not have a human shape would be more discomforting as it is not easily recongnized for anything other than what it is, an unidentifiable monster moving on its own with no air noise.
Comment