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Torpedo Mark 13, OP 629(A), 1942, covers the primary air dropped U.S.N. torpedo of WW II.

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Ordnance Pamphlet No. 629(A)
Issuing No.

Supplemented by
OCL T6-43
OCL T7-43
OTI TV12-43

DESCRIPTION, ADJUSTMENT,
CARE AND OPERATION
of
U. S. NAVY TORPEDOES
MARK 13, 13 - 1 and 2

PREPARED BY
WERNER E. FOLLIN
CHIEF ENGINEERING AIDE, ORDNANCE

U. S. NAVAL TORPEDO STATION NEWPORT - RHODE ISLAND
JULY, 1942

EXAMINED BY
R. S. CARR
LIEUTENANT COMMANDER, U. S. NAVY

F. H. ROBERTS
CAPTAIN, U. S. NAVY (Ret.)
INSPECTOR OF ORDNANCE IN CHARGE



I
 
RESTRICTED

O.P. 629(A)
TORPEDOES
UNITED STATES NAVY TORPEDOES
MARK 13 AND MARK 13 MODIFICATION 1 AND 2

Naval Torpedo Station,
Newport, Rhode Island,
27 August 1942.

1. This publication contains a. complete description and instructions for the disassembly, assembly, adjustments, tests and operation of the Mark 13 and Mark 13 Modification 1 and 2 United States Navy Torpedo, together with Bureau of Ordnance circular letters T-145. T-150, T-155, T-162, T-165, T-173, T-2-42.

2. This publication is in accordance with Bureau of Ordnance letter A7-3(Mna) of 6 July 1942, and R.P.M. 1554 classified as RESTRICTED.

3. Instructions for preliminary and final adjustments as outlined in Chapter IX, and for complete overhaul of torpedo as outlined in Chapter X, are prepared with the steps in the proper sequence and compliance with these instructions will place the torpedo in a fully ready condition.

4. Suggestions and reports of errors should be forwarded to the Inspector of Ordnance in Charge, Naval Torpedo Station, Newport, Rhode Island.

5. This publication supersedes Ord. 629.

6. This publication is issued by the United States Naval Torpedo Station, Newport, Rhode Island.

F. H. Roberts
F. H. Roberts
Captain, U.S. Navy (Ret.)
Inspector of Ordnance in Charge



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TABLE OF CONTENTS

  Page No
CHAPTER I - GENERAL REMARKS
General Description 3
Principal Dimensions, Weights and Characteristics 3
Interchangeability 6
Parts Carrying Numbers 6
Characteristics of Construction 6
Buoyancy 6
CHAPTER II - DESCRIPTION OF SECTIONS
The War Head 9
The Exercise Head 10
The Air Flask 15
The Air Compartment 15
The Water Compartment 15
The Blow-Out Plug 16
The Fuel Flask 17
The Midship Section 17
The Afterbody 18
The Tail, Mark 13 19
The Tail, Mark 13-1 20
CHAPTER III - THE REDUCING AND SUPERHEATING SYSTEM
General Description 25
Stop and Charging Valves 25
Starting and Reducing Valves 27
Fuel and Water Delivery System 30
The Air Checks 30
Fuel and Water Checks and Strainers 32
Combustion Flask 33
Sprays 34
Igniter 34
CHAPTER IV - PROPELLING MECHANISM
Nozzles 39
Turbine Bulkhead 39
Main Engine 39
Smoke Prevention 41
Oiling System 41
Exhaust System 41
Propeller Shafts 42
propeller Sleeves 43
propellers and Hubs 44


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TABLE OF CONTENTS

  Page No.
CHAPTER V - THE STARTING GEAR AND GOVERNOR
Starting Gear 47
Governor 49
CHAPTER VI - IMMERSION MECHANISM
General Description 53
Immersion Gear Base 54
Immersion Gear Casing 54
pendulum 54
Hydrostatic Diaphragm 55
Depth Setting Mechanism 57
Locking Gear 58
Depth Engine 60
Depth Steering Line 62
CHAPTER VII - THE GYRO MECHANISM
General Description 67
Gyro Mechanism Base 67
Gyro Pot 68
Gyro Clamp Plate and Cover 69
The Top Plate 69
Spinning and Unlocking Mechanism 70
Pallet Mechanism 76
Steering Engine 80
Steering Line 82
Gyro Reducing Valve 82
Top Plate Centering Device 83
CHAPTER VIII - MARK 12-1 GYRO
General Description 87
Gyro Wheel and Spindle 88
Inner and Outer Gimbal Rings 88
Wheel Centers and Bearings 89
Inner Gimbal Ring Bearings and Centers 91
Cam Plate 91
Bearing Clearances 90
Gyro Balancing 94
CHAPTER IX - ADJUSTMENTS
Adjustments and Tests 99
Preliminary Adjustments 99
Final Adjustments 107
Preparation for a War Shot 112
Routine Upkeep for Fully Ready Torpedo 115
Treatment After a Run 118
General Information 124


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TABLE OF CONTENTS

  Page No.
CHAPTER X.- DISASSEMBLY, OVERHAUL, ASSEMBLY AND TESTS
General 127
Lubricants 128
PART I - Exercise Heads Mark 26,25-1 and 26-2 129
PART II - Air Flask 135
PART III - Afterbody, Removal of Major Units from 145
PART IV - Afterbody Shell Group 149
PART V- Valve Group and Superheater 152
PART VI - Main Engine 154
PART VII - Starting Gear 165
PART VIII - Immersion Mechanism, Gyro Mechanism, Gyro Gears 168
PART IX - Assembly and Test of Afterbody and Tail Complete 200
PART X - Assembly of Afterbody and Exercise Head on Air Flask 212
CHAPTER XI - BUREAU OF ORDNANCE CIRCULAR LETTERS
T-145 217
T-150 219
T-155 221
T-152 225
T-165 226
T-173 228
T-2-42 230


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This page is blank.



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PLATE TABLE OF PLATES WITH PAGE NO
1 General Arrangement - Mark 13 6
2 General Arrangement - Mark 13-1 6
2A General Arrangement - Mark 13-2 6
3 Mark 13 and 13-1 Warhead 10
4 Mark 26 Exercise Head - Longitudinal Section 10
5 Mark 26-1 Exercise Head 10
6 Mark 26-2 Exercise Head 10
7 Exercise Head - Sectional Views 10
8 Torpedo Headlight - General Arrangement 14
9 Wiring Diagram 14
10 Air Flask - Longitudinal Section 16
11 Welded Air Flask - Longitudinal Section 16
12 Air Flask - Sectional Views 16
14 Air Flask - End View 16
14 Afterbody - Shell, Rings, Flanges 18
15 Afterbody - General Arrangement 18
16 Piping System 18
17 Oil Tank Assembly and Piping 18
18 Three Tail Assemblies used on Mark 13 and Mods. 20
19 Mark 13-1 and 2 Tail - Vertical Section 20
20 Piping Diagram - Mark 13 and Mods. 26
21 Valve Group and Superheater - End View 26
22 Valve Group and Superheater - Sectional View 26
23 Turbine and Gear Train - Elevation 40
24 Turbine and Gear Train - Section 40
25 General Arrangement - Starting Gear 50
26 Diagram of Starting Gear 60
27 Diagrammatic-View of Immersion Mechanism 54
22 Diagram of Depth Gear 54
29 Mark 13-1 Immersion Mechanism - General Arrangement 54
30 Immersion Mechanism - General Arrangement 54
31 Depth Engine - Diagrammatic 60
32 Gyro mechanism - Plan View 68
33 Gyro Mechanism - Section and End View 68
34 Gyro Spinning Mechanism 70
35 Diagrammatic View - Pallet Mechanism 76
36 Mark 12-1 Gyro 88
37 Lubrication Chart 123
38 Alcohol Water Chart 124
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