115:
into the projectile. Waved ridges, longitudinal nicks, or knurling is machined into the bottom of the notch to prevent the band from slipping around the projectile as the projectile accelerates down the gun barrel. The rotating band is made of a ring of slightly greater diameter than the projectile, slipped into position while thermally expanded, and pressed radially into place with a powerful
132:
17:
122:
The forward edge of the band may be conically tapered to fit into a coned seat at the start of the gun barrel rifling. The central portion of the band is roughly cylindrical with a diameter slightly larger than the groove diameter of the gun barrel to ensure a tight fit in gun barrels worn by firing
114:
may be used on major-caliber projectiles. Rotating band width of about one-third of the projectile caliber provides superior performance, but two narrower bands, separated by a short distance, have been used to conserve strategic metals in wartime. Each band is secured in a dovetailed notch machined
123:
previous projectiles. The rear portion of the band may include a flared skirt of even larger diameter in front of a groove to hold the skirt as it is compressed by barrel dimensions. The skirt is intended to provide a gas seal in the most heavily eroded portion of the bore near the powder chamber.
168:
Gatling cannon, use plastic driving bands instead of soft metal. Using plastic as a swage material reduces wear on the barrel's rifling, and extends the life and average accuracy of the weapon.
110:
As shell weight increases, it becomes more difficult to engineer a driving band that prevents propellant gases from either blowing past it, or blowing it off the shell. Tougher alloys like
107:
band near the front of the projectile. This band keeps the projectile travelling straight in the bore supported by the lands between the rifling grooves, but doesn't engage the rifling.
312:. Issued by National Defense Research Committee. Washington D.C.: Office of Scientific Research and Development, National Defense Research Committee, Division 18. p. 115.
56:
the metal into the rifling of the barrel and forms a seal; this seal prevents the gases from blowing past the shell and engages the barrel's
135:
Modern 155 mm artillery ammunition – these shells are unusual in having two driving bands. The shell on the right is a modified M107.
20:
Russian 122 mm shrapnel shell, which has been fired, showing rifling marks on the copper driving band around its base and the steel
239:
355:
176:
190:
driving bands instead of copper due to material shortages. Porous iron bands were favored over solid ones.
292:
284:
270:
262:
143:. Freely rotating bands can be used to reduce the spin imparted to the round as is preferable for
219:
61:
307:
313:
214:
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worked extensively on ways to eliminate the driving band, leading to the development of his
140:
139:
Driving bands pre-cut for the rifling have been used for muzzle loaded weapons, e.g. some
116:
37:
340:
158:
100:
90:
Engage with the rifling of the barrel to spin the projectile and stabilize its flight.
349:
165:
41:
183:
243:
147:
warheads or fin-stabilised projectiles fired from general-purpose rifled barrels.
179:
in copper or another soft alloy, making the entire bullet its own driving band.
150:
111:
209:
131:
77:
204:
199:
104:
21:
16:
154:
84:
57:
45:
83:
Seal the bore to prevent burning powder gas from moving through the
317:
172:
130:
53:
15:
187:
144:
49:
306:
United States Office Of
Scientific Research And Development.
164:
Some weapons that operate at high rates of fire, such as the
157:
ammunition using an inversion of the pre-cut rifling for his
52:. When the shell is fired, the pressure of the propellant
72:The rotating band has three essential functions:
295:: Lord Baltimore Press. pp. 500 & 501.
76:Center the rear end of the projectile in the
8:
36:is a band of soft metal near the base of an
273:: Lord Baltimore Press. pp. 507–511.
231:
257:
255:
253:
7:
186:, German ammunition sometimes used
177:entire bullet is typically covered
14:
240:"GD-OTS Air Delivered Munitions"
1:
99:The shell is stabilized for
87:grooves past the projectile.
103:in the barrel by a smaller
372:
341:Big Bullets for Beginners
155:Extended Range, Full Bore
117:hydraulic banding press
136:
25:
134:
19:
356:Artillery ammunition
293:Baltimore, Maryland
271:Baltimore, Maryland
246:on August 17, 2007.
220:Rotating gas-check
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26:
363:
328:
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324:
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275:
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259:
248:
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242:. Archived from
236:
215:Sabot (firearms)
171:In a small-arms
40:, often made of
24:nearer the front
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285:Fairfield, A.P.
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263:Fairfield, A.P.
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196:
129:
97:
95:Characteristics
70:
38:artillery shell
12:
11:
5:
369:
367:
359:
358:
348:
347:
344:
343:
336:
335:External links
333:
330:
329:
309:War metallurgy
298:
289:Naval Ordnance
276:
267:Naval Ordnance
249:
230:
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217:
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195:
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159:GC-45 howitzer
128:
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96:
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69:
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62:spin-stabilize
13:
10:
9:
6:
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3:
2:
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166:GAU-8 Avenger
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63:
59:
55:
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47:
43:
42:gilding metal
39:
35:
34:rotating band
31:
23:
18:
321:. Retrieved
308:
301:
288:
279:
266:
244:the original
234:
184:World War II
181:
170:
163:
149:
138:
121:
109:
98:
71:
33:
30:driving band
29:
27:
151:Gerald Bull
112:cupronickel
64:the shell.
323:2022-05-13
318:2009655232
226:References
210:Obturation
127:Variations
78:gun barrel
205:Gas check
200:Cannelure
105:bourrelet
22:bourrelet
350:Category
287:(1921).
265:(1921).
194:See also
182:During
141:mortars
85:rifling
68:Purpose
58:rifling
316:
175:, the
54:swages
46:copper
173:rifle
48:, or
314:LCCN
188:iron
145:HEAT
50:lead
101:yaw
60:to
32:or
352::
291:.
269:.
252:^
161:.
119:.
44:,
28:A
326:.
80:.
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