Technology and Operations
This forum is for discussing technological & operational matters pertaining to U-boats.
Re: Torpedo Launching
Posted by:
ROBERT M.
()
Date: November 04, 2003 04:51AM
TomW:
I don't know if this info is of any help with your calculations, but here goes:
On U.S. Fleet boats, there are 6 impulse tanks forward and 4 aft, which
contain 7 cuft each.
They are charged from the 3000psi air system via a 600# Grove reducer. Each tank supplies impulse air to only one torpedo tube firing
valve, through a charging manifold. The piping from the impulse flask
to the firing valve is 4'' diameter. Impulse air enters at the after end of the tube.
From surface to periscope depth (65' keel depth) the impulse flask is charged to 300psi. From periscope depth to 120' (keel depth), charged to 400psi. From 120' (keel depth) to 180' (keel depth), 525psi.
These pressures are established for use with the Poppet-Valve air-
retrieving system. The the firing valve was adjusted so that, at 120' to keel, a torpedo launching velocity of 30 to 40 fps was attained with a
maximum tube pressure of 60 to 70psi more than the "static head'. (depth in feet, from surface to the centerline of the tube, multiplied by 0.44, giving psi)
Regards,
ROBERT M.
I don't know if this info is of any help with your calculations, but here goes:
On U.S. Fleet boats, there are 6 impulse tanks forward and 4 aft, which
contain 7 cuft each.
They are charged from the 3000psi air system via a 600# Grove reducer. Each tank supplies impulse air to only one torpedo tube firing
valve, through a charging manifold. The piping from the impulse flask
to the firing valve is 4'' diameter. Impulse air enters at the after end of the tube.
From surface to periscope depth (65' keel depth) the impulse flask is charged to 300psi. From periscope depth to 120' (keel depth), charged to 400psi. From 120' (keel depth) to 180' (keel depth), 525psi.
These pressures are established for use with the Poppet-Valve air-
retrieving system. The the firing valve was adjusted so that, at 120' to keel, a torpedo launching velocity of 30 to 40 fps was attained with a
maximum tube pressure of 60 to 70psi more than the "static head'. (depth in feet, from surface to the centerline of the tube, multiplied by 0.44, giving psi)
Regards,
ROBERT M.