188:
MA-5A functioned as the "half stage" in the Atlas's "stage-and-a-half" design, meaning they functioned as a booster attached to a central sustainer core, but did not include their own fuel tanks. Instead, fuel was drained out of the tanks of the sustainer core, until partway through the launch the
197:
rocket engines, each contained in a nacelle for aerodynamic reasons. The middle was left empty to accommodate the RS-56-OSA engine of the sustainer stage. The two booster engines shared a common
220:
MA-5A was based on the design of the previous MA-5 stage, used on Atlas I. The main difference between the two designs was the replacement of the MA-5's two
244:
213:
for the engines and for tank pressurization. On the Atlas IIAS configuration, MA-5A also featured attachment points for four
298:
338:
312:
276:
370:
214:
190:
251:
173:
84:
292:
205:, combustion chambers, and other hardware. The stage also contains ten bottles of pressurized
115:
221:
165:
25:
193:, MA-5A consisted of a thrust structure with attachment points and fuel lines for two
364:
198:
128:
35:
342:
316:
210:
202:
189:
booster segment was jettisoned. Similar to the booster segments on previous
169:
45:
177:
206:
161:
279:. Space Launch Report. Archived from the original on August 13, 2016
194:
100:
132:
147:
142:
124:
114:
106:
95:
90:
80:
72:
64:
56:
51:
41:
31:
21:
245:"Atlas Launch System Payload Planner's Guide"
8:
16:
15:
233:
290:
239:
237:
7:
14:
250:. Lockheed Martin. Archived from
110:2,100 kN (470,000 lbf)
76:4,187 kilograms (9,231 lb)
164:stage. It was manufactured by
160:was an American liquid fueled
1:
341:. Astronautix. Archived from
315:. Astronautix. Archived from
120:296 seconds (2.90 km/s)
387:
217:4A solid rocket boosters.
68:3.05 metres (10.0 ft)
60:3.43 metres (11.3 ft)
297:: CS1 maint: unfit URL (
277:"Atlas IIA(S) Data Sheet"
224:engines with RS-56-OSAs.
172:rocket, derived from the
138:
52:General characteristics
209:, used to drive the
18:
345:on March 19, 2002
155:
154:
32:Country of origin
378:
355:
354:
352:
350:
335:
329:
328:
326:
324:
309:
303:
302:
296:
288:
286:
284:
273:
267:
266:
264:
262:
257:on 21 April 2015
256:
249:
241:
116:Specific impulse
19:
386:
385:
381:
380:
379:
377:
376:
375:
361:
360:
359:
358:
348:
346:
337:
336:
332:
322:
320:
311:
310:
306:
289:
282:
280:
275:
274:
270:
260:
258:
254:
247:
243:
242:
235:
230:
201:, but separate
186:
168:for use on the
166:Lockheed Martin
26:Lockheed Martin
12:
11:
5:
384:
382:
374:
373:
363:
362:
357:
356:
330:
319:on May 1, 2002
304:
268:
232:
231:
229:
226:
185:
182:
153:
152:
149:
145:
144:
143:Launch history
140:
139:
136:
135:
126:
122:
121:
118:
112:
111:
108:
107:Maximum thrust
104:
103:
97:
93:
92:
88:
87:
82:
78:
77:
74:
70:
69:
66:
62:
61:
58:
54:
53:
49:
48:
43:
39:
38:
33:
29:
28:
23:
13:
10:
9:
6:
4:
3:
2:
383:
372:
371:Rocket stages
369:
368:
366:
344:
340:
334:
331:
318:
314:
308:
305:
300:
294:
278:
272:
269:
253:
246:
240:
238:
234:
227:
225:
223:
218:
216:
212:
208:
204:
200:
199:gas generator
196:
192:
191:Atlas rockets
183:
181:
179:
175:
171:
167:
163:
159:
150:
146:
141:
137:
134:
130:
127:
123:
119:
117:
113:
109:
105:
102:
98:
94:
89:
86:
83:
79:
75:
71:
67:
63:
59:
55:
50:
47:
44:
40:
37:
36:United States
34:
30:
27:
24:
20:
347:. Retrieved
343:the original
333:
321:. Retrieved
317:the original
313:"Atlas IIAS"
307:
281:. Retrieved
271:
259:. Retrieved
252:the original
219:
187:
176:used on the
157:
156:
81:Derived from
22:Manufacturer
349:10 January
228:References
211:pneumatics
203:turbopumps
125:Propellant
96:Powered by
73:Gross mass
323:9 January
283:9 January
261:9 January
195:RS-56-OBA
101:RS-56-OBA
365:Category
293:cite web
170:Atlas II
65:Diameter
46:Atlas II
339:"MA-5A"
222:LR-89-7
178:Atlas I
151:Retired
42:Used on
215:Castor
207:helium
184:Design
162:rocket
148:Status
57:Height
255:(PDF)
248:(PDF)
158:MA-5A
91:MA-5A
17:MA-5A
351:2016
325:2016
299:link
285:2015
263:2016
174:MA-5
133:RP-1
85:MA-5
129:LOX
367::
295:}}
291:{{
236:^
180:.
99:2
353:.
327:.
301:)
287:.
265:.
131:/
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.