AAWSAP DIRD, Positron Aerospace Propulsion, March 2010

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UNCLASSIFIED/ /FOR. errl@IAL YSI: e ..tv
1000
-E
::.:.-
0.1
t = 1530 sec
v = 7600 m/sec,140 km
1= 1200 sec
l= 146 sec
M = 1.8, 10000m
M =8, 38 km
I= 1650sec
300km
0
500 sec
1000sec
1500sec
Time
Figure 9. Positron SSRV Flight Profile (courtesy Positronics Research LLC) 23
The SSRV takes off horizontally (Figure 9) from Edwards Air Force Base, accelerates to
mach 1.8 as a turbojet, and then goes to the ramjet mode. At mach 8 the rocket is
ignited and takes the vehicle into LEO. 24 The positron mass budget for a 60,500-kg dry
mass for ascension to LEO is 86 .9 mg (Table 3) .
Table 3. Total Positron Requirement for SSRV With a Dry Mass of 60,500 kg 25
Mission Mode
Mass Of e!
Turbojet ­ Launch
2.5 mg
Ramjet
76.5 mg
10% margin (turbojet mode upon
7.9 mg
landing, inclination changes, etc. )
TOTAL
86.9 mg
An artist's rendition of the SSRV is provided in Figure 10.
UNCLASSIFIED//FOR 8FFI@IAL YSI!! er•tY
10