Documents / Report
This Defense Intelligence Reference Document, dated 1 November 2010, was produced by the Defense Intelligence Agency under its Advanced Aerospace Weapon System Applications (AAWSA) Program. It surveys propulsion technologies that include chemical, ion, and nuclear fission rockets, fusion schemes, aneutronic fusion, and antimatter propulsion. It also covers radiation shielding and speculates on research needs over the next 30 years for missions from low Earth orbit to Mars, Jupiter, Saturn, and Alpha Centauri. The document concludes that aneutronic fusion promises to be an important mechanism for future space propulsion.
“Anderson”1 page
UNCLASSIFIED//FOR OFFICIO I 1!55 0111 Y
t=~sinh 1(at')=!:_cosh 1(a~ +!)
a c a c (A.8)
,~---------------------~
" '" (12 11,'.1 05 0,(, 11,7 0.8
Vic
Figure 12. Time Dilation at Relativistic Velocities.
The Tsiolkovsky rocket equation is important as it relates the change in the mass of a
rocket due to fuel consumption in order to generate a desired LIV, or velocity change:
i'. V = I In [ m,.,.,,.,,),,, fl/ fi,wl
(A.9)
For a relativistic rocket, velocity is affected by time dilation resulting in the relativistic
rocket equation:
i'. V = c tanh(l:, 1n("'""""'~ )JC /n 1 /wol
(A.10)
Through any propulsion method, kinetic energy must be added to the rocket through
reaction mass (propellant) in order to accelerate the rocket to its final velocity. Since
mass changes with velocity, we will need to use Einstein's equation to determine the
kinetic energy required to accelerate the rocket to a final velocity based on its rest
mass, mo.
E=mc 1 =KE+m c 1
"
KE=mc 2 -m c 2 =m yc 2 -m c 2
0 " "
KE=rn c 2 (Y-1)
" '
31
UNCLASSIFIED/71P8R:: 8PPI@Itllt 1!!19!!! 8HLY
(A.11)
(A.12)
(A.13) Not linked to a story yet.
Report, from the dia collection. The PDF is mirrored here; the original link is above. 50 pages are in the text index: search them above, or from the library's search.