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Folks,
Torpedo Data Computer Mark 3, Mark 3, Mods 5 to 12 inclusive, O.P. 1056, 1944 describes the most successful torpedo fire control computer of WW II. It is considered a masterpiece of mechanical computing design.
Please report any typos, or particularly annoying layout issues with the Mail Feedback Form for correction.
Richard Pekelney
Webmaster
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RESTRICTED |
ORDNANCE PAMPHLET No. 1056 |
JUNE, 1944
This Publication is RESTRICTED and will be handled in accordance with
Article 76, United States Naval Regulations, 1920
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Prepared for the Bureau of Ordnance
by the
ARMA CORPORATION
Brooklyn, New York
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NAVY DEPARTMENT
BUREAU OF ORDNANCE
WASHINGTON, D. C.
ORDNANCE PAMPHLET NO. 1056-
TORPEDO DATA COMPUTER MARK 3 MODS. 5 TO 12.
1. This Ordnance Pamphlet contains information on the description, operation, maintenance, and installation of the Torpedo Data Computer Mark 3 Mods. 5 to 12.
2. The following publications pertain to the Torpedo Data Computer Mark 3 Mods. 5 to 12 and accessories:
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O.S. No. 2182 | Specifications for Torpedo Control System for Submarines |
| O.D. No. 2585 | Gyro Setting Indicator Regulator Mark 1 and Mods. 1 and 2 |
| O.D. No. 2561 | Torpedo Data Computer Mark 3 Mods. 5 to 12, inclusive |
3. Ordnance Data O.D. 2561 is now obsolete and should be destroyed upon receipt of this publication.
4. Ordnance Pamphlet O.P. 1056 is classified as restricted and should be handled in accordance with the provisions of Article 76, Navy Regulations, 1920.
G. F. HUSSEY, JR.
REAR ADMIRAL, U. S. NAVY
CHIEF OF BUREAU OF ORDNANCE |
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This page is blank.
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TABLE OF CONTENTS
| SECTION 1-Analysis of the Fire Control Problem |
11 |
| Terminology and Symbols |
13 |
| Distances |
13 |
| Speeds |
15 |
| Time |
15 |
| Angles |
15 |
| Review of Trigonometry |
18 |
| Derivation of Equations |
21 |
| General Problem |
21 |
| Derivation of Equations Solved by the Position Keeper |
22 |
| Derivation of Equations Solved by the Sound Bearing Converter |
27 |
| Derivation of Equations Solved by the Angle Solver |
29 |
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| SECTION 2-Fundamentals of Components of the Data Computer |
33 |
| Differentials |
34 |
| Integrator |
42 |
| Resolvers |
44 |
| Proportionator |
48 |
| Follow-up Head |
50 |
| Cams |
52 |
| Dials |
54 |
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| SECTION 3-Function |
55 |
| General Function of the Computer |
56 |
| Mechanical Follow-up Heads |
58 |
| Integrator Unit |
66 |
| Divider Unit |
67 |
| Position Keeper |
68 |
| Functional Diagram of Position Keeper and Sound Bearing Converter |
68A |
| Functional Description of Position Keeper |
69 |
| Gear Diagram of Position Keeper and Sound Bearing Converter |
75A |
| The Sound Bearing Converter |
76 |
| Unit Assembly Diagram of Position Keeper and Sound Bearing Converter |
78A |
| Resolver Unit |
79 |
| Proportionator Unit |
80 |
| Differential Unit |
81 |
| Cam Unit |
82 |
| Base Line Resolver |
84 |
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| SECTION 3-Function-Continued |
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| Angle Solvers |
85 |
| Functional Diagram of the fwd Angle Solver |
86A |
| Functional Description of the Angle Solver |
87 |
| Gear Diagram of the fwd Angle Solver |
93A |
| Unit Assembly Diagram of the fwd Angle Solver |
95A |
| Internal Wiring Diagram of Angle Solver and Position Keeper |
97A |
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| SECTION 4-Construction |
99 |
| General |
100 |
| Position Keeper Section |
104 |
| Exterior |
104 |
| Interior |
105 |
| Dials |
107 |
| Angle Solver Section |
108 |
| Exterior |
108 |
| Interior |
109 |
| Dials |
111 |
| Interconnection of the Cases |
113 |
| Resolver Unit |
114 |
| Proportionator Unit |
120 |
| Differential Unit |
124 |
| Detent Mechanism |
126 |
| Divider Unit |
127 |
| Time Motor Governor |
128 |
| Integrator Unit |
129 |
| Sound Bearing Converter |
132 |
| Cam Unit |
136 |
| Stops |
142 |
| Follow-up Heads |
143 |
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| SECTION 5-Disassembly and Reassembly |
145 |
| Separation and Removal of Chassis |
146 |
| Removal of Position Keeper From Case |
152 |
| Removal of Angle Solver From Case |
154 |
| Disassembly of Position Keeper Chassis |
157 |
| Disassembly of Angle Solver Chassis |
163 |
| Reassembly of Position Keeper |
170 |
| Reassembly of the Angle Solver |
186 |
| Securing the Sections in Place |
204 |
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| SECTION 6-Tests |
217 |
| Position Keeper Tests |
218 |
| For Mk. 3, Mods. 5 to 12, Inc. |
220 |
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| SECTION 6-Tests-Continued |
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| For Mk. 3, Mods. 5-9, 11 and 12, only |
222 |
| For Mk. 3, Mods. 5-9 and 12, only |
222 |
| For Mk. 3, Mod. 10, only |
224 |
| For Mk. 3, Mods. 10 and 11, only |
224 |
| Position Keeper Notes |
224 |
| Angle Solver Tests |
224 |
| For Mk. 3, Mods. 5 to 12, Inc. |
226 |
| Angle Solver Notes |
232 |
| Sound Bearing Converter Tests |
233 |
| Sound Bearing Converter Note |
233 |
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| SECTION 7-Installation |
235 |
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| SECTION 8-Adjustments |
247 |
| Thermostat |
248 |
| Time Motor Governor |
248 |
| Slip Clutches |
248 |
| Follow-up Motor Damps |
248 |
| Angle Solver Range Stop Switches |
250 |
| Offset Angle Zero Detent Switches |
250 |
| Integrator Unit and Divider Unit Discs |
250 |
| Synchro Motor and Generator Electrical Zero |
250 |
| Mechanical Follow-up Heads |
250 |
| Correct Solution Light Switches |
252 |
| Dials |
254 |
| Sound Base Line |
254 |
| Tube Base Line |
254 |
| Cam Unit Settings |
256 |
| Replacing Uy and M Knob Dials |
256 |
| Replacing Angle Solver Front Cover |
256 |
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| SECTION 9-Lubrication |
259 |
| Synchro Bearings |
260 |
| Follow-up Heads |
260 |
| Integrator Discs and Time Motor |
261 |
| Miscellaneous |
262 |
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| SECTION 10-Appendix |
263 |
| General Information |
264 |
| Inputs and Outputs |
265 |
| Dial and Counter Graduations |
267 |
| Relative Speeds |
271 |
| Principal Drawings |
271 |
| Element Numbers |
272 |
| Exercising Stored Instruments |
276 |
| Distribution List |
277 |
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