“Masse”33 pages
- p. 4 …Influence of Target Velocity and Intercept Angle on Impact Energy and
Required Mass .................................................................................................. 33
Table 5…
- p. 5 …The term "minisatellite" refers to a spacecraft with a wet
mass (including onboard propellant) of 100…
- p. 7 …Nanosatellite Technologies
OVERVIEW
Nanosats require technologies that radically reduce the mass and power of components
without…
- p. 8 …nanosat presents some unique challenges, with
low mass (0.25 kg) and low power (0.5…
- p. 9 …In order to develop a low mass C&DH, a lightweight and low power electronics
packaging…
- p. 11 …RF COMMUNICATIONS
The onboard RF subsystem must be small, low mass, and low power. The system…
- p. 12 …additional strain on an already challenged nanosat mass and power budget. For this
reason, the concept…
- p. 13 …The material will be selected based on mass, cost, manufacturability, ease of assembly
and integration, and…
- p. 15 …for the spacecraft because a large
propellant mass and heavy energy source are not carried onboard…
- p. 17 …Current Lightcraft designs are limited to about 60 g mass and 15 cm in diameter
by…
- p. 21 …It
requires a beam power of 0.1 to 1 MW per kg of vehicle mass…
- p. 22 …The majority of the system mass required to launch a
payload to orbit is left on…
- p. 24 …Therefore, this would allow
approximately 4 kg of mass to be placed into orbit with the…
- p. 25 …same ply-thickness)
to meet Lightcraft airframe mass requirements.
Another important finding in the study was…
- p. 31 …Additional estimated mass for performing the Lightsat
function is no more than about 1 kg, if…
- p. 32 …Lightcraft takeoff masses no more
than about 20 kg can be accelerated to orbital velocities by…
- p. 33 …for missile and maneuvering aircraft
interception.
• Additional mass along Lightcraft centerline for hardened target penetration.
LIGHTCRAFT…
- p. 34 …Lightcraft sizing assumed a propellant mass fraction of 0.5 and 1.0 MW
of laser…
- p. 35 …Hybrid Rocket Expendible Launch Vehicle - Assumed Perfonnance and Estimated Weights
Payload Mass (kg) 1.00 5…
- p. 37 …It is therefore estimated that the air-to-space Lightcraft dry mass would be about the…
- p. 38 …Influence of Target Velocity and Intercept Angle on Impact Energy
and Required Mass 2 61.
Lightcraft…
- p. 39 …Influence of Lightcraft and Target Velocity on Impact Energy and
Required Mass 261.
Lightcraft Lightcraft Impact…
- p. 40 …The lower mass also saves
launch costs, so the total system costs less for the same…
- p. 41 …many spacecraft that the economics of true mass production will come into play in
space for…
- p. 44 …the local vertical, with its
center of mass in GEO.
The Fresnel zone plate has a…
- p. 46 …wall plug and optical efficiencies, cost, complexity, mass,
and size. Free-electron lasers are another class…
- p. 47 …P = 2000 Pa (or 0.02 atmospheres).
• Mass flow rate, Q = 60 kg/sec per module…
- p. 48 UNCLASSIFIED//509 AEEJCJOP 11£5 O.-blf
+ Total mass flow rate, Qtota1 = 240 kg/sec for…
- p. 50 …sec, and 15 kg/sec of CD2
mass flow represents 2.053 x 1026 molecules/sec…
- p. 51 …The 60 kg/sec mass flow requirement of the 3: 1 N2/C02 lasing gases means…
- p. 53 …mass (not including the
prime power and cooling systems) to achieve the low specific mass (5…
- p. 65 …is the undulator period, mis the electron mass, and c is the speed of light.
'MeV…
- p. 72 …The Lightcraft
specific impulse is essentially infinite (several thousand seconds in rocket mode), while
payload mass…
UNCLASSIFIED/ ,'F&II. &FFllilo\l!! l!l!i! 9Hl!!Y
Table 3. Estimated Costs for Hybrid Rocket and Lightcraft Launch Vehicles for
ETO Flight [ 261.
32
3-Stage Hybrid Rocket
Launch Vehicle
Payload ($)
Boosters ($)
Integration ($)
Total($)
Lightcraft Vehicle.f
Ground Based Laser
Lightcraft ($)
Lightcraft Fuel ($)
Laser Power ($)
Laser Refurb. ($)
Total($)
Rocketcraft Cost
Lightcraft Cost
100 Flights
1.0 kg 5.0 kg
Payload Payload
24,948 124,740
399,503 440,927
96,163 101,441
520,615 667,108
1.0 kg 5.0 kg
Payload Payload
24,948 124,740
2,495 12,474
500 2,500
3,000 3,000
30,943 142,714
16.82 4.67
1982 dollars multiplied by 1.62
(2.7% annual inflation) for 2000 dollars
to kg
Payload
250,128
477,131
123,941
851,200
10 kg
Payload
250,128
25,013
5,000
3,000
283,141
3.00
UNCLASSIFIED//FQA: QFFI&l11J.k W&liii Q•lklf