I remember years ago seeing an article in a National Geographic showing Alvin in which a styrofoam head was shown after the submarine had come back up from very deep. This head was stored in an external retrieval basket and was thus subjected to the pressure of this deep dive. It was shown compared to what the head looked like prior to the dive and was quite small having most of the air within it crushed out.
How much pressure or rather how deep must styrofoam go down to expel the air within it? If it were perhaps just cups and not thicker, would it go down to say 500 feet without
being crushed smaller?
Anyone have any idea? I was concidering using simple styrofoam as an inexpensive sonar baffling for reletively shallow operations. How far down should this be good for without changing shape upon returning topside?
David Bartsch
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