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Brent. I have noticed that the hinge pin on some of the hatches are in a
slightly elongated or oval hole so that the pin isn't holding up the hatch when
it's closed. Also, some of the guys have hard ''o'' rings, and some have much
softer ones. 1/2 inch looks to be the norm. I think if the mating surfaces
are machined well enough, you won't get water passing the ring, as the area for
water intrusion is VERY small when the hatch is pressed down by external
pressure.
The tourist subs I've seen all have one ''O'' ring. Can't argue with what
works. Frank D. Get a sneak peek of the all-new AOL.com. |