[PSUBS-MAILIST] ROV build video

[Sean T. Stevenson via Personal_Submersibles]

The failure pressure is governed by the wall thickness to diameter ratio, plus the end conditions (bulkheads) for buckling modes. Longer tubes will be less stable, so you want it just long enough to accommodate your camera.

I don't know what sort of condition your acrylic tubing comes in, but if you're cutting / machining it, I'd be inclined to anneal it if you can do so easily. Even if there is no issue with the hydrostatic pressure performance, annealing will give you a better chance of surviving an accidental impact when the tube is already stressed.

Sean

-------- Original Message --------
On Nov. 1, 2020, 04:25, hank pronk via Personal_Submersibles wrote:

> David, I am just amazed how strong that acrylic is. Of coarse the small diameter is critical. The tube is 1\8 wall.
> Hank
>
> On Saturday, October 31, 2020, 11:51:32 PM MDT, David Colombo via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> Hank, that's impressive. How thick was the wall of the acrylic tube?
> David
>
> On Sat, Oct 31, 2020, 4:25 PM hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>> https://www.youtube.com/watch?v=OL-0z9Rl8jo
>>
>> https://www.youtube.com/watch?v=OL-0z9Rl8jo
>>
>> Pressure Testing Camera Housing For New ROV Project
>>
>> My new fly out ROV project.
>>
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