Computer Mark 1 and Mark 1A
| Page | |
| INTRODUCTION | 8 |
| PART 1 GENERAL DESCRIPTION | 9 |
| The Computer Mark 1 in the Gun Director Mark 37 System | 10 |
| Automatic Fire Control in the Gun Director Mark 37 System | 24 |
| A simplified account of Tracking, Prediction, and Stabilization | 28 |
| A more detailed account of Tracking, Prediction, and Stabilization | 43 |
| Parallax Corrections | 66 |
| The Star Shell Computer Mark 1 | 68 |
| Summary of Computer Mark 1 Data | 72 |
| Design Features of the Computer Mark 1 | 76 |
| PART 2 OPERATION | 79 |
| OPERATING CONTROLS | 80 |
| The Dials on the Front of the Computer Mark 1 | 82 |
| The Controls on the Front of the Computer Mark 1 | 94 |
| Handcranks and Dials on the Rear Top of the Computer | 102 |
| The Target Course Indicator | 106 |
| The Star Shell Computer | 107 |
| OPERATING INSTRUCTIONS | 110 |
| The Four Types of Operation | 112 |
| Secured Condition | 114 |
| Standby Condition | 116 |
| Automatic Operation | 120 |
| Semi-automatic Operation | 122 |
| Manual Operation | 126 |
| Local Operation | 136 |
| Summary of Special Types of Operation | 138 |
| SAMPLE PROBLEM | 148 |
| OPERATING CAUTIONS | 156 |
| Page | |
| PART 3 DETAILED DESCRIPTION | |
| INTRODUCTION | 161 |
| THE DECK TILT GROUP | 164 |
| The Inputs to the Deck Tilt Group | 165 |
| The Deck Tilt Mechanism | 166 |
| THE RELATIVE MOTION GROUP | 172 |
| The Inputs to the Relative Motion Group | 173 |
| The Mechanism | 175 |
| Relative Motion for a Surface Target | 178 |
| Relative Motion for an Air Target | 180 |
| The Height Computer | 184 |
| THE INTEGRATOR GROUP | 186 |
| The Mechanism in the Integrator Group | 187 |
| Generated Changes of Range | 189 |
| Generated Changes of Elevation 190 Generated Changes of True Bearing | 194 |
| THE RATE CONTROL GROUP | 202 |
| The Four Main. Methods of Rate Control | 204 |
| Local Control | 208 |
| Manual Control of Rates | 214 |
| Semi-automatic Rate Control | 218 |
| The Rate Control Computing Mechanism | 220 |
| Making Rate Corrections in Semi-auto | 232 |
| Automatic Rate Control | 240 |
| The Target Course Indicator | 254 |
2
| Page | |
| THE PREDICTION SECTION | 266 |
| The Mechanism in the Prediction Section | 268 |
| Computing Advance Range, R2 | 276 |
| Computing Predicted Target Elevation, E2 | 280 |
| Computing Sight Angle, Vs | 284 |
| Computing Sight Deflection, Ds | 286 |
| Computing Fuze Setting Order, F | 288 |
| Computing Wind Rates | 292 |
| Initial Velocity | 308 |
| Spots | 312 |
| THE TRUNNION TILT SECTION 314 | |
| Setting up the Line of Fire from the Horizontal | 316 |
| The Line of Fire from a tilted deck | 318 |
| The Mechanisms and the Equations | 320 |
| Computing Vz | 321 |
| Computing Dd | 322 |
| THE SYNCHRONIZE ELEVATION GROUP | 326 |
| The Synchronize Elevation Mechanism | 332 |
| The Elevation Lines in Continuous Aim | 334 |
| The Elevation Lines in Selected Level Fire with Elevation selected at the Director | 335 |
| The Elevation Lines in firing without a Director | 336 |
| Page | |
| THE PARALLAX SECTION | 338 |
| A summary of the Parallax Corrections | 342 |
| Train Parallax Correction, Ph | 343 |
| Elevation Parallax Correction, Pv | 346 |
| The Parallax Shift Gears | 348 |
| Elevation Parallax Correction, Pe | 350 |
| Derivation of the Parallax Equations | 354 |
| THE STAR SHELL COMPUTER MARK 1 | 356 |
| Star Shell Range | 358 |
| Star Shell Fuze Setting Order | 359 |
| Star Shell Gun Train Order | 360 |
| Star Shell Gun Elevation Order | 362 |
| THE SELECTOR DRIVE MARK 1 | 368 |
| APPENDIX | |
| LIMITS OF ACCURATE COMPUTATION | 378 |
| MODIFICATION DIFFERENCES | 382 |
| Major Modification Differences | 383 |
| Pertinent Serial Numbers | 386 |
| List of FORDALT's | 388 |
| List of ORDALT's | 390 |
| List of OD's | 391 |
| Details of Modification Differences | 392 |
| Table of Modification Differences | 399 |
| GLOSSARY OF QUANTITIES AND SYMBOLS | 401 |
There is a schematic diagram of the entire Computer Mark 1 at the end of this pamphlet 433
3
COMPUTER MK 1A - OP 1064 Addendum
TABLE OF CONTENTS
| Page | |
| INTRODUCTION | 1 |
| GENERAL DESCRIPTION | |
| Basic Mechanisms | 2 |
| Types of Targets and Attack | 3 |
| Automatic Fire Control in the Gun Director Mk 37 System | 3 |
| Tracking the Target | 3 |
| The Rate Control Group | 3 |
| How Rate Control Corrects Rate of Climb, Target Speed, and Target Angle | 4 |
| Another Way to Think About Rate Control | 5 |
| Parallax Correction | 5 |
| The Star Shell Computer | 5 |
| Inputs and Outputs of Computer Mk 1A | 5 |
| SUMMARY OF COMPUTER MK 1A DATA | 6 |
| Size - Weight - Power Supply | 6 |
| Limits of Operation | 6 |
| Design Features | 14 |
| OPERATION | |
| OPERATING CONTROLS | 15 |
| The Dials on the Front of Computer Mk 1A | 15 |
| Time Motor and Power Switches | 15 |
| Initial Velocity and Dead Time | 17 |
| The Controls on the Front of Computer Mk 1A | 17 |
| The Controls in the Target and Ship Group | 17 |
| The Controls at the Range Station | 17 |
| The Controls at the Bearing Station | 18 |
| The Controls at the Elevation Station | 18 |
| Handcranks and Dials on the Rear Top of the Computer | 18 |
| The Target Course Indicator | 19 |
| The Star Shell Computer | 19 |
| OPERATING INSTRUCTIONS | 20 |
| The Conditions of the Computer | 20 |
| Types of Operation | 20 |
| Instructions for Operating Computer Mk 1A | 20 |
| Page | |
| Secured Condition | 20 |
| Standby Condition | 21 |
| Standby for an Air Target | 21 |
| Automatic Operation | 21 |
| Manual Operation Against an Air Target | 22 |
| Standby for a Surface Target | 22 |
| Automatic (Normal) Operation (Surface Target) | 22 |
| Local Operation | 22 |
| Main Battery Operation | 22 |
| Operating Cautions | 22 |
| DETAILED DESCRIPTION | |
| Relative Motion and Integrator Groups | 23 |
| Increase of Target Speed | 23 |
| Shaft Values 23 | |
| Integrator Group | 23 |
| RATE CONTROL | 24 |
| Handcranks and Dials Used in Rate Control | 24 |
| The Rate Control Computing Mechanism | 24 |
| The Rate Error Correction Measuring Network | 24 |
| Target Motion Correction Computing Network | 25 |
| Sensitivity Control | 28 |
| Sensitivity Control of Range Rate Control Network | 32 |
| Sensitivity Control of the Elevation and Bearing Rate Control Networks | 32 |
| Summary of Operation of the Elevation and Bearing Sensitivity Control Network | 34 |
| Local Control | 37 |
| Normal (Automatic) Control | 37 |
| Automatic Tracking Controls | 37 |
| The Control Switch | 42 |
| The Range Rate Control Switch | 42 |
| Time Motor Control System | 42 |
| The Low E Switch | 44 |
| The Target Course Slew System | 45 |
| Control of Range Input | 45 |
| Low Range Switch | 46 |
4
| Page | |
| PREDICTION SECTION | 46 |
| Computing Advance Range, R2 | 47 |
| The Elevation Prediction Network | 47 |
| Computing Sight Deflection, Ds | 48 |
| Computing Fuze Setting Order, F | 48 |
| Initial Velocity | 50 |
| SPOTS | 50 |
| Elevation Spot for Surface Fire | 50 |
| Gun Orders | 50 |
| THE SYNCHRONIZE ELEVATION GROUP | 50 |
| The Elevation Transmitter | 50 |
| Page | |
| Parallax | 51 |
| Parallax Range | 51 |
| Elevation Parallax Correction, Pe | 51 |
| MOD DIFFERENCES | 52 |
| Serial Numbers | 52 |
| List of Fordalts | 52 |
| List of Ordalts | 53 |
| Table of Modification Differences | 53 |
| COMPARATIVE INDEX | 57 |