DESCRIPTION OF TORPEDO TUBES AND FIRING MECHANISM
TORPEDO TUBES NOS. 37, 38.
1. TUBE BARRELS:
Two torpedo tube barrels about eighteen feet in length are mounted vertically on the centerline in the bow, separated by about ten inches. The barrels are built up from three sixteenths steel plate, welded and riveted. Vertical and horizontal lands of three eights inch brass strips one inch wide extended about two thirds the length of the barrel from a three inch wide circular bearing plate at the muzzle. The top and bottom lands consist of two strips about five eights of an inch apart thereby providing a top and bottom guide slot to receive the guide studs on the torpedo and in addition to receive the guide studs built up on the vertical shoes of the torpedo.
The breech section is a semi-spherical casting riveted and welded to the barrel and containing a housing for the impulse air check valve and an adjustable tail stop with a thick rubber buffer. The torpedo is muzzle loaded. The clearance between the torpedo and the tube lands is about one sixteenth inch.
2. SETTING SPINDLES AND STOPS:
The tubes are provided with gyro and depth setting spindles, engaged and disengaged individually at the tubes, but turned for simultaneous setting by mechanical linkage and shafts to the control room. The torpedoes and depth indicator dial in the control room indicated a five meter depth setting. Gyro angles were zero.
The stop bolt located on the top of the tube and the tripping latch are mechanically lifted and lowered by an operating shaft at the breech section. On firing, the stop bolt is lifted by an air piston. The tripping latch housing inspected, was packed with fresh white lead and oil.
3. DRAINAGE AND VENTING:
Located near the breech end are individual three and one half inch copper flood pipes and one inch copper vent pipes leading outboard. The tubes are free flooding and venting.
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