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... thrusters used, which must be capable of consuming total powers of the order of a MW. It is confirmed in this paper that this is indeed possible with gridded ion thrusters ... is shown that four 20 cm beam diameter thrusters could consume a total of 1 MW, and provide a total thrust of 10 N at an SI of 19,300 s ...

'''Author - C. Maccone '''Co-Author(s)''' - '''JBIS Volume ''' - Contents of the Journal of the British Interplanetary Society for Volume 59 59 '''Page ''' - 283-289 '''Year''' - 2006 '''Keywords''' - SETI, astronomy, history, mathematical models, evolution '''JBIS Reference Code ''' - 2006.59.283 '''Number of Pages''' - 7 Abstract Assume that the history of Astronomy and SETI ...

... 132-zirconium hydride fused tubes to promote criticality. It had a design power of 500 MW or 25,000 pounds of thrust, ran on LH2 and weighed 6000 pounds. In an ... tests, the norm was around 70-95-pounds/second for reactors which were over 1000+MW, except for the Pewee, which was about half of that at 500MW. The 55-inch Phoebus 2A, still the world’s most powerful reactor at 5000 MW, needed hydrogen at 280-pounds/second. Moreover, don’t worry about the technical feasibility of ...

... fixed-drum start tested control drum response; maximum power reached was 230 mw, compared with reactor’s 1,100-mw design power. Test duration was nine minutes, and maximum exhaust temperature was ... start was aborted, system was given normal start; in 22-min. test it reached 350-mw maximum power and 2,130°F maximum temperature. Nuclear Engine for Rocket Vehicle Application NERVA ...

... '''(II.11a)''' \overset\cdot \beta = \eta_u '''(II.11b)''' Here, \overset\sim \omega is the angular velocity as measured by the gyro, \ \beta is the bias, or drift, and \ \eta_\upsilon and \ \eta_u

... ^T '''(III.9d)''' \textbf W _m and \textbf W _c are weighing matrices that depend on \ n and \ \lambda. \textbf R _ k+1 is the measurement noise covariance matrix. \hat y _ k+1 ^-

... ^ th magnetorquer dipole according to m_i = k\overset\cdot b _i, \mathfrak i = 1, 2, 3 , \ k > 0 , '''(IV.1)''' where \overset\cdot b _i is the derivative of the \ i^ th component of the magnetic field expressed in frame \mathcal B and \ k is a ...

... s^ -0.5 . The measurement noise standard deviations are \ \sigma_m = 1.5 \times 10^ -5 for the magnetometer and \sigma_s = 2.9 \times 10^ -3 for the sun sensor. For MEKF and UQKF, the initial covariance \textbf P ^ MEKF (t_0) matrix is

... those paths to apply in our trajectory program. I ended up having to conceptualize the math to do this and then write the Fortran code, which was daunting. Called it Hypercubes ... was one area where a number of people had concerns. And we had math modeled, or Barney had math modeled, and his team, the dynamics of getting the tank away from the ... concluded that you could do a so-called “mechanical analog.” You come up with a math model to represent a mechanical situation that’s analogous to what the effect of this ...

... run of Phoebus 2A nuclear reactor at Jackass Flats, Nev. Level of approximately 2,000 mw, highest achieved in program to date, was held about 30 sec to ver­ify satisfactory ... test, reactor was expected to be operated at power level of 4,000-5,000 mw. ''(AEC/NASA Release L-131)'' U.S. patent No. 3,380,687 was granted to ...

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