Underwater nail gun - GIF

Underwater nail gun.

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Previously:

APS underwater rifle - photo
Cleaning an underwater data center - GIF
Full auto underwater gun - GIF
Komatsu D155W underwater bulldozer - photo
Scuba divers shaken by underwater earthquake - GIF
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Nothing special about the nail gun. The tittle should have been using a pneumatic nail gun under water.
Back in the middle 1980s when I had a dock building company, I used my Paslode gun under water a lot of the time nailing 3 1/2" coated ring shank nails. New construction wasn't bad but when having to do repairs on older construction the discharge made the water so cloudy with Alge you had to wait until it cleared or just nail by feel alone.

Hi Gang:
Perhaps they could vent the discharge to the surface.
Carl.

Quote:

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Originally Posted by carl blum

Hi Gang:
Perhaps they could vent the discharge to the surface.
Carl.

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You would have to have a big hose as small one would restrict the air flow and reduce nailing force. Similar to putting a small exhaust outlet on an engine.

Quote:

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Originally Posted by hemmjo

You would have to have a big hose as small one would restrict the air flow and reduce nailing force. Similar to putting a small exhaust outlet on an engine.

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We tried doing just that with a 4 ft section of 3-inch shop vac hose. The problem is not just the diameter of the hose, but the column of water trapped in the hose adds to the restriction. 5 or six feet under water doesn't have much effect but when down say 20 to 30 feet even the natural increase of water pressure starts to show some reduction in the amount of power pneumatic power tools could produce. When I was rebuilding marinas on local lakes, I wasn't using the nail gun as much as a drill and impact wrench sometimes as deep as 45 feet we had to turn the pressure up on the compressor a little. While working offshore we had hydraulic power tools

Hi Gang:
So roughly each foot of depth reduces available air pressure by 0.5 PSI, So if you were running the gun at 100 PSI at 40 foot you would only effectively have 80 PSI available. But if you were exhausting into a rigid hose to the surface you would still have 100 PSI and it would help if the exhaust hose was larger than supply. Plus the big advantage of not stirring up dirt in the water.
On factory air cylinders we would route all the exhaust air back to a common muffler.
Carl.