< imagine a water rock
in space
[ img an asteroid that flew by picture ]
\
asteroid-itokawa-desk-1024.jpg
water rock?
you cook it and water
comes off, leaving dry, space
sand and
steam.
you are in space
imagine a heater
cooking it till it turns red,
very dull red.
You can use the sun if
you wish.
Imagine you had an
aluminum coated mylar ballon wrapped around
some of it.
Imagine the size of 3 football fields
for the balloon.
you are in space
Some near earth
asteroids, nea',s are so
small
you
could
almost wrap a mylar ballon completely around them
Imagine how cold space feels.
You catch the water steam.
space is cold.
Steam condenses
into your water balloon.
Imagine
The space sand drifts
away, back on to the nea.
You get rich solar cooking rocks in space
for the water.
50,000 tonnes is worth USD $5.5 Billion.
in space
The comet space
geologist Dr. Gene Shoemaker
said
are supposed to be water rock
hydrated minerals
consistency of dried clay or mud
He died, so he can get away with claiming that
and not get in trouble
if he were wrong.
How right was he?
imagine a cookie oven
in self-cleaning mode.
water rocks inside.
steam comes off.
space is cold.
water condenses.
water balloon space ship hauls
50,000 tonnes back to
space around earth.
we win.
7/2/2010 11:42:15 PM >
< 7/2/2010 11:55:33 PM
Prospecting and a Water Balloon Space Ship to
bring the rocket fuel propellant back from space.
about 500 of them easy to get to or to bring space minerals.
(( delta_V for
capture into orbit around Earth < about 0.5 km/sec ))
often, like going to
Mars, or quicker.
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V∞ |
∆V rendezvous |
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∆V to Capture |
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a |
e |
i |
P |
at Earth |
at comet |
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Mission ∆V |
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% over minimum ∆V |
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A.U. |
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deg. |
yrs |
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km/s |
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0 |
50 |
100 |
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neo-comets |
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km/s |
km/s |
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lo |
med |
hi |
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1979 VA #4015 |
2.6415 |
0.6228 |
2.79 |
4.29 |
8.19 |
0.1 |
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3.1 |
4.64 |
6.14 |
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3.0 |
4.50 |
6.00 |
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(2010 KQ) |
1.0236 |
0.0080 |
0.07 |
1.04 |
0.23 |
0.1 |
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0.1 |
0.17 |
0.18 |
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0.0 |
0.05 |
0.07 |
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(2005 TH50) |
0.8374 |
0.2257 |
0.73 |
0.77 |
0.27 |
3.3 |
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3.3 |
3.32 |
3.33 |
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0.0 |
0.05 |
0.07 |
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(2000 SG344) |
0.9774 |
0.0668 |
0.11 |
0.97 |
0.31 |
0.7 |
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0.7 |
0.74 |
0.76 |
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0.0 |
0.05 |
0.07 |
--------
lots of them
row 247
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(2009 VS25) |
0.9706 |
0.2781 |
5.26 |
0.96 |
2.10 |
2.1 |
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2.4 |
2.51 |
2.63 |
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0.3 |
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98943 (2001 CC21) |
1.0324 |
0.2192 |
4.81 |
1.05 |
2.10 |
1.2 |
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1.4 |
1.57 |
1.70 |
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0.3 |
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(2008 VR4) |
0.9221 |
0.3879 |
4.19 |
0.89 |
2.10 |
3.8 |
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4.1 |
4.20 |
4.33 |
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0.3 |
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(2006 SF6) |
0.9491 |
0.2805 |
5.87 |
0.92 |
2.11 |
2.2 |
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2.5 |
2.58 |
2.71 |
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0.3 |
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164202 (2004 EW) |
0.9894 |
0.2797 |
4.66 |
0.98 |
2.11 |
2.1 |
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2.4 |
2.48 |
2.61 |
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0.3 |
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(2001 CK32) |
0.7255 |
0.3825 |
8.13 |
0.62 |
2.11 |
4.3 |
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4.5 |
4.65 |
4.78 |
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0.3 |
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(2004 ER21) |
0.8996 |
0.1714 |
7.95 |
0.85 |
2.12 |
0.6 |
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0.8 |
0.98 |
1.10 |
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0.3 |
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(2002 AW) |
1.0698 |
0.2561 |
0.57 |
1.11 |
2.12 |
1.6 |
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1.8 |
1.96 |
2.09 |
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0.3 |
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234145 (2000 EW70) |
0.9374 |
0.3212 |
5.42 |
0.91 |
2.12 |
2.8 |
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3.1 |
3.19 |
3.32 |
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0.3 |
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(2009 WQ6) |
0.8668 |
0.4086 |
5.82 |
0.81 |
2.12 |
4.3 |
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4.6 |
4.70 |
4.83 |
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0.3 |
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(2002 LY1) |
0.9549 |
0.3793 |
2.91 |
0.93 |
2.12 |
3.6 |
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3.8 |
3.95 |
4.08 |
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0.3 |
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(2008 NP3) |
1.0048 |
0.3346 |
1.44 |
1.01 |
2.13 |
2.8 |
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3.0 |
3.16 |
3.29 |
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0.3 |
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(2009 HG21) |
0.9080 |
0.3677 |
5.44 |
0.87 |
2.13 |
3.5 |
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3.8 |
3.94 |
4.07 |
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0.3 |
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(2002 OA22) |
0.9359 |
0.2429 |
6.92 |
0.91 |
2.14 |
1.6 |
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1.9 |
2.04 |
2.17 |
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0.3 |
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2340 Hathor |
0.8442 |
0.4497 |
5.85 |
0.78 |
2.14 |
5.0 |
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5.3 |
5.42 |
5.55 |
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0.3 |
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(2000 WP19) |
0.8543 |
0.2886 |
7.68 |
0.79 |
2.14 |
2.5 |
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2.7 |
2.85 |
2.98 |
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0.3 |
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(2007 UW1) |
0.9074 |
0.1211 |
8.22 |
0.86 |
2.15 |
0.3 |
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0.6 |
0.70 |
0.84 |
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0.3 |
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(2004 FG29) |
0.8785 |
0.4924 |
3.51 |
0.82 |
2.16 |
5.5 |
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5.8 |
5.91 |
6.04 |
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0.3 |
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(2007 YS56) |
0.9423 |
0.2836 |
6.24 |
0.91 |
2.16 |
2.2 |
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2.5 |
2.62 |
2.75 |
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0.3 |
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163000 (2001 SW169) |
1.2483 |
0.0516 |
3.55 |
1.39 |
2.17 |
1.3 |
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1.6 |
1.71 |
1.84 |
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0.3 |
row 266
---
0.3 km / sec mission delta_V happens often 100's
0.99 km/s mission delta V is what I chose.
that's down to about line 190
about 150 objects known with total mission delta_V
"small", less than 0.99 km/s
= prospecting candidates
- about 500 of them with capture delta_V under 500 m/s
- best candidates have low V_infinity at earth because needs lowest peak rocket thermal power.
Estimate of water balloon space
ship
Summary:
30 tons of nuclear thermal rocket engines
( about 3 Gigawatts
engine of the
hot, clunky type )
40 tons of tanks
and you get
35,744 tonnes of water
pushes
50,000
tonnes
of
anything
payload,
water, platinum, gold, iridium, palladium,
steel, ceramic
into
an orbit captured about Earth.
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7/3/2010 0:00 |
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cooked water rock nea gives H2O water |
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6/29/10 9:55 |
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check acceleration calculation |
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Input |
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water rock 50 kT, Slo Thrust credible engines, dV 50% margin, E_liq-g fixed |
|
tank-C Deimos 50 kT water
ship 2010.06.28_0739.xls |
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margin_dv |
10 |
% |
margin delta_V outhere over minimum mission delta_V |
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margin_dvCap |
10 |
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margin delta_V at Earth over minimum mission delta_V |
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margin_dT_nea |
1000 |
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margin timefactor times burn hours at earth |
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ullage |
1 |
percent |
percent of "fuel" left over |
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tankF |
0.1 |
percent |
tank mass per fuel propellant mass, with margin |
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Isp |
190 |
seconds |
specific impulse |
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Pld |
50,000.00 |
tonnes |
payload |
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Eng |
30.00 |
tonnes |
engine --heater with its structure |
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nozfact |
0.95 |
factor |
nozzle efficiency factor |
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slowtime |
2 |
hours |
thrust time |
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Output |
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dV |
990.00 |
m/s |
mission delta_V |
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35.74 |
tonnes |
tank |
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bareship |
65.74 |
tonnes |
empty ship |
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fuelpropellant |
35,744.42 |
tonnes |
fuel propellant |
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85,810.17 |
tonnes |
starting mass |
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|
628.97 |
tonnes |
Margin excess propellant at destination |
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|
0.009068241 |
g |
acceleration relative to earth = 1g |
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maxpowerNTR |
2.63E+09 |
watts |
maximum peak thermal engine power |
Notice:
isn't that a nice coincidence of nature?
Summary:
30 tons of nuclear thermal rocket engines
( about 3 Gigawatts
engine of the
hot, clunky type )
40 tons of tanks
and you get
35,744 tonnes of water
pushes
50,000
tonnes
of
anything
payload,
water, platinum, gold, iridium, palladium,
steel, ceramic
into an orbit captured about Earth.
7/3/2010 12:50:04 AM, draft cleaned up
2010.07.03_0825