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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
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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
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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
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for the engines and for tank pressurization. On the Atlas IIAS configuration, MA-5A also featured attachment points for four
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booster segment was jettisoned. Similar to the booster segments on previous
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279:. Space Launch Report. Archived from the original on August 13, 2016
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245:"Atlas Launch System Payload Planner's Guide"
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250:. Lockheed Martin. Archived from
110:2,100 kN (470,000 lbf)
76:4,187 kilograms (9,231 lb)
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164:stage. It was manufactured by
160:was an American liquid fueled
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341:. Astronautix. Archived from
315:. Astronautix. Archived from
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120:296 seconds (2.90 km/s)
7:
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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.
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172:rocket, derived from the
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52:General characteristics
209:, used to drive the
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345:on March 19, 2002
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32:Country of origin
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116:Specific impulse
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168:for use on the
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26:Lockheed Martin
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319:on May 1, 2002
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143:Launch history
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107:Maximum thrust
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36:United States
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347:. Retrieved
343:the original
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321:. Retrieved
317:the original
313:"Atlas IIAS"
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281:. Retrieved
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259:. Retrieved
252:the original
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176:used on the
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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:^
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