Hi guys. Recently found this forum and quickly found it to be a wealth of useful information and helpful people.
My friend recently shelled out over $1k for a dive light and being a mechanical engineer major who works with optics and a diver it occurred to me I can make a flashlight twice as awesome for a quarter of the price, and have the ability to say I designed and made it when people ask me where I bought it.
I am going to document the project here and annoy you guys for occasional feedback/scrutiny; no substitute for experience.
Lets make a flashlight.
I rather not engage in finite element analysis, even though I have a parametric model going, since I think the answers can be found much faster by probing the experience pool around here.
The question is do the concentric side sealing o-rings really do the job well and seal the light down to ~300psi (600ft)? I have seen that feature reading though the threads but I wanted to make sure I wasn't misinterpreting the design. The o-rings I am referring to are the three seals on on the maroon body in the image of the model.
And if so what the typical % height compression of the circular cross section of the thickness diameter; ie:the part of the o-ring in the image that resides inside the purple volume.
Considering everything is lubed well with silicone.
*yes there are a few overlapping areas on the model but the geometries are changing my the minute as I play with different lenses and other components; this is just a snapshot of the creative flow process*