I. |
Introduction |
1 |
II. |
Small Arms |
5 |
| |
a. |
Definition and Procurement Summary |
5 |
| |
b. |
Procedure for Small Arms Procurement |
6 |
| |
c. |
Problems |
10 |
| |
|
1. |
Spare Parts |
11 |
| |
|
2. |
Supply and Repair |
12 |
| |
|
3. |
Caliber .38 Special Ammunition Assembled with Unjacketed Bullets |
15 |
| |
|
4. |
Belted Ammunition |
19 |
| |
|
5. |
Packaging |
19 |
III. |
Caliber .50 AA Machine Gun |
21 |
| |
a. |
Development |
21 |
| |
b. |
Procurement |
25 |
IV. |
1.1" AA Machine Gun |
29 |
| |
a. |
Early History |
29 |
| |
b. |
Production |
34 |
| |
|
1. |
Guns and Mounts |
34 |
| |
|
1. |
Power Drives |
38 |
| |
c. |
Distribution and Dispositions |
42 |
V. |
20mm Antiaircraft Gun |
45 |
| |
a. |
Introduction |
45 |
| |
b. |
Background and Adoption of 20mm |
47 |
| |
|
1. |
Early British Activities |
47 |
| |
|
2. |
Reason for Selection of Oerlikon Over the Hispano-Suiza |
53 |
| |
c. |
Production Program |
57 |
| |
|
1. |
Preliminary Contract Negotiations |
57 |
| |
|
2. |
Increasing Requirements |
64 |
| |
|
3. |
Mounts |
68 |
| |
|
4. |
Cutbacks and Terminations |
77 |
| |
|
5. |
Costs |
81 |
| |
|
6. |
Speeding Production |
84 |
| |
d. |
Distribution |
95 |
| |
e. |
Future of the 20mm Gun |
98 |
VI.. |
40mm Bofors Gun |
102 |
| |
a. |
Introduction |
102 |
| |
b. |
Adoption of Gun by the U.S. Navy |
103 |
| |
|
1. |
Critical Antiaircraft Situation |
103 |
| |
|
2. |
Purchase of a 20mm Bofors Gun |
107 |
| |
|
3. |
Testing Period |
112 |
| |
|
4. |
Negotiations of Contract for Manufacturing Rights |
117 |
| |
c. |
Production Program |
127 |
| |
|
1. |
Early Design Problems |
127 |
| |
|
2. |
Overall Performance Program |
130 |
| |
|
|
(a) Initial Procurement Plans, 1941 |
130 |
| |
|
|
(b) Development of the Procurement Pattern |
132 |
| |
|
3. |
Associated Equipment |
139 |
| |
|
|
(a) Power Drives |
139 |
| |
|
|
(b) Fire Control |
147 |
| |
|
|
(c) Ammunition |
149 |
| |
|
4. |
Requirements |
153 |
| |
|
5. |
Special Problems |
159 |
| |
|
|
(a) Continuing Design Problems |
139 |
| |
|
|
(b) Balancing Production |
161 |
| |
|
|
(c) York Safe and Lock Company |
163 |
| |
|
|
(d) Machine Tools, Materials, and Priorities |
166 |
| |
c. |
Use and Performance |
171 |
| |
|
1. |
General Characteristics |
171 |
| |
|
2. |
Distribution |
174 |
| |
|
3. |
Antiaircraft Performance |
178 |
| |
|
4. |
Maintenance and Performing Problems |
180 |
| |
|
5. |
Possibilities with Blind Firing Directors |
182 |
VII. |
3" Guns |
184 |
| |
a. |
Introduction |
184 |
| |
b. |
Dual Purpose Mounts |
188 |
| |
|
1. |
Single Mount Mark 24 |
188 |
| |
|
2. |
Single Mount Mark 22 |
189 |
| |
c. |
Twin Mount Mark 27 |
191 |
| |
d. |
Production Program |
192 |
| |
|
1. |
Schedule of Requirements |
192 |
| |
|
2. |
Assemblies |
193 |
| |
|
3. |
Mounts |
195 |
| |
|
4. |
Power Drives |
197 |
| |
|
5. |
Associated 3"/50 Equipment |
198 |
VIII. |
4"/50 Mount Mark 12 Mods |
200 |
| |
a. |
Introduction |
200 |
| |
b. |
History and Characteristics |
200 |
| |
c. |
Procurement |
201 |
| |
d. |
Procurement |
43 |
IX. |
5" Guns |
203 |
| |
a. |
Introduction |
203 |
| |
|
1. |
5"/38 Guns |
203 |
| |
|
|
(a) 5"/38 Base Ring Mounts |
204 |
| |
|
|
(b) 5"/38 Pedestal Mounts Mark 24 and Mod 2 |
205 |
| |
|
|
(c) 5"/38 Twin Mounts Mark 28 Mods, Mark 29 Mods, Mark 32 Mods, and Mark 38 Mods |
205 |
| |
|
2. |
5"/25 Guns |
206 |
| |
|
3. |
5"/54 Guns |
206 |
| |
b. |
History of 5"/38 |
207 |
| |
|
1. |
Prewar Development of 5"/38; The Mark 37 Merchant Mount |
207 |
| |
|
|
(a) Inauguration of Program to Arm Merchant Vessels |
207 |
| |
|
|
(b) Selection of 5"/38, Extensively Modified, for Merchant Arming Program |
208 |
| |
|
2. |
Status of 5"/38 Program at Beginning of War |
211 |
| |
|
|
(a) 5"/38 Caliber Single Mounts (Base Ring Type) for DD's and Auxiliaries |
211 |
| |
|
|
(b) 5"/38 Gun and Single Pedestal Mount Assembly |
213 |
| |
|
|
(c) 5"/38 Twin Gun and Mount Assembly |
214 |
| |
|
3. |
Production Program During the War |
216 |
| |
|
|
(a) 5"/38 Merchant Mount Mark 37 |
220 |
| |
|
|
(b) 5"/38 Pedestal Mounts |
222 |
| |
|
|
(c) 5"/38 Caliber Single Mount Mark 30 (Base Ring Type) |
228 |
| |
|
|
(d) 5"/38 Twin Gun Mount Assembly |
228 |
| |
c. |
History of 5"/25 |
232 |
| |
|
1. |
Development |
232 |
| |
|
2. |
Production Program |
232 |
| |
d. |
History of 5"/54 Mount |
236 |
| |
|
1. |
Development |
236 |
| |
|
2. |
Production Program |
241 |
X. |
6"/47 Gun |
241 |
| |
a. |
Introduction |
241 |
| |
b. |
History of 6"/47 Dual Purpose Twin Mount |
241 |
| |
c. |
Plans for Proposed 6"/47 Twin Turret |
249 |
| |
d. |
6"/47 Triple Turret Production Program |
250 |
XI. |
8"/55 Gun |
253 |
| |
a. |
Introduction |
253 |
| |
b. |
History of 8"/55 Caliber Turret for CA-139 Class Cruiser |
253 |
| |
c. |
Production Program for CA 68-75 and 122 Class Cruiser |
271 |
XII. |
12"/50 Gun |
273 |
| |
a. |
Introduction |
273 |
| |
b. |
History of 12"/50 Three-Gun Turret |
273 |
XIII. |
16" Guns |
282 |
| |
a. |
Introduction |
282 |
| |
b. |
Development in 16" Guns |
282 |
| |
c. |
Production Program |
286 |