rocket science

ROCKET SCIENCE

John hebert  5/25/18

CONTENTS—
Rocket science facts
Rocket performance specifications 

Rocket formulas 

ROCKET SCIENCE FACTS
1. I have calculated optimistic and conservative estimates on how fast spacecraft can travel at 3 points in time: conservative estimates: 2035AD-23 miles per second; 2200AD-200 miles per second;2265AD (Star Trek’s time)-29% of the speed of light
optimistic estimates: 2035AD-185 miles per second; 2200AD-8,000 miles per second (4.29% of the speed of light); 2265AD-99.75% of the speed of light.
2. If the Earth were 9 inches big, then the voyager spacecraft that left the solar system travels 90 feet per day and 6 miles a per year, and would now be 174 miles away from the Earth. The proposed Orion interstellar spacecraft travels a mile a day and over 350 miles per year.
3. If a space probe were launched from the Earth at at velocity of 11.5 miles per second, and if that Earth were reduced to a 1 foot size, the Moon would be about 4 inches large, it would be 2.5 feet away from the 1 foot Earth, and it would take 2 days and 9 hour to reach the Moon. the Sun would be over 9 feet large, over 970 feet away, and it would tale the space probe 93 days to reach it. Mars would be 641 feet away and the probe would reach it in just over 2 months. Pluto would be 7.25 miles away and the probe would take just over 10 years to get there. The current distance of the earlier probe that left the solar system, Voyager 2, would be 57 miles away and our probe took 40 years to get that far. The nearest star, Alpha Centauri, would be over 50,000 miles distant and it would take the probe over 69,500 years to get there. To get to the very large star Betelguese, which is visible in the night in the Orion constellation, would take 10.5 million years to get there and the star would be 1.85 miles large. With our Earth reduced to a size of 1 foot, the largest star known would be 4.5 miles large in comparison. The Andromeda galaxy would be 29 billion miles away, and finally, the edge of the universe would be almost 92 light years away.

4. If each year that the voyager spacecraft were to equal a grain of sand, then a sphere 1,000 feet in diameter filled with grains of sand (years) would be how long it would take the spacecraft to cross the universe from one end to the other end.
5. To launch the Saturn 5 rocket, the amount of antimatter need to do it would be 17.155 grams, or 1/26.5 pounds of antimatter. This would require 10 trillion trillion anti-hydrogen atoms of antimatter.
6. To propel a 170 pound person 1/2 of the speed of light, it would require 8.694 x 10^17 joules of energy, equivalent to 28,900 Saturn 5 launches, and would require 106.2 pounds of antimatter to do this.
7. The amount of antimatter to travel to Mars, distance 114 million miles, a 39 day trip, constant acceleration to the end velocity of 16.99 miles per second, and the mass of the rocket at 5,000 tons, the amount of antimatter needed for these specification is 18.964 grams of antimatter (equal to the weight of 6 pennies).
8. To send 1 pound of cargo to alpha Centauri in 43 years at a velocity of 10% of the speed of light using chemical rockets would require 5.9 x 10^2,147 tons of fuel to get there. In comparison, the mass of the entire universe is 3.2 x 10^50 tons . 

9. With the recent interstellar mission proposal to alpha Centauri by the starshot project which will take 20 years to get there, if the earth were the size of a smoke particle, the space probe would travel 1.6 feet in a day, 11 feet a week, 44 feet a month, 528 feet in a year, and to complete the mission, 2 miles when it arrived at its destination. 

SEVERAL SPACECRAFT DESIGN SPECIFICATIONS
mag-sail to jupiter- 

velocity=63,821 meters/second (39.57 miles per second)

Initial mass=53.9 tons 

acceleration=.00143 meters/second^2

force=70 newtons 

Kinetic energy=9.98 x 10^13 joules 

Energy density=2.04 x 10^9 joules/kilogram 

power=2.23 x 10^6 watts 

Specific power=.0456 kilowatts/kilogram 

momentum=31.15 x 10^9 meters-kilogram 

impulse=3.13 x 10^9 newtons- second 

distance=to jupiter (880 million miles) 

Time for journey=517.19 days (1.416 months) 

2. ion propulsion to jupiter- 

velocity=90,000 meters/second (55.8 miles per second) 

Exhaust velocity=55,860 meters/second 

isp=5,694 seconds 

Mass ratio=2.5

Initial mass=486 kilograms 

Final mass=220.91 kilograms 

acceleration=.00284 meters/second^2

force=1.38 newtons 

Kinetic energy=1.98 x 10^12 joules 

Energy density=4.66 x 10^9 joules/kilogram 

power=62,371.66 watts 

Specific power=.128 kilowatts/kilogram
momentum=43.74 x 10^6 meters-kilogram
impulse=43.56 x 10^6 newtons-second 

Fuel flow=.0000154 kilograms/second 

distance=to jupiter (880 million miles)

Time for journey=365.25 days (12 months) 

3. Orion nuclear pulse to jupiter—

Velocity=100 kilometer/second (62 miles per second)
Exhaust velocity=117.72 kilometers/second
Isp=12,000 seconds 

Mass ratio=2.34

Initial mass=10,000 tons 

Final mass=4,273.5 tons 

acceleration=39.2 meters/second^2 

force=356,363,363 newtons 

Kinetic energy=5.08 x 10^20 joules 

Energy density=5.59 x 10^13 joules/kilogram
power=1.78 x 10^13 watts 

Specific power=1,960 kilowatts/kilogram
momentum=909.1 x 10^9 meters-kilogram 

impulse=1.176 x 10^15 newtons-second 

Fuel flow=.319 kilograms/second 

distance=to jupiter (880 million miles)

Time for journey=330 days (11 months) 

How much antimatter is need if used=31 pounds 

4. vasimr to jupiter-

velocity=33,894.23 meters/second (21 miles per second)
Velocity exhaust=2,625.99 meters/second 

isp=267.69 seconds 

Initial mass= 1,290.72 tons 

Final mass=100 tons (hypothetical) 

Mass ratio=12.9072
acceleration=.00103 meters/second^2
newtons=4,727.83 

Kinetic energy=6.74 x 10^14 joules 

Energy density=5.744 x 10^9 joules/ kilogram 

power=200 megawatts 

Specific power=.00951 kilowatts/kilogram 

momentum=3.98 x 10^10 meters-kilogram
impulse=99.4 x 10^9 newtons-second 

Fuel flow=.0558 kilograms/second 

distance=to jupiter (880 million miles)

Time for journey= 243.4 days 

How much antimatter is need if used=374.44 grams 

5. TAU to jupiter- (this craft was intended to go out 1,000 AUs) 

velocity=191,808 meters/second  (118.92 miles per second)
Initial mass=about 32 tons 

acceleration=.00032 meters/second^2

force=9.32 newtons 

Kinetic energy=5.35 x 10^14 joules 

Energy density=1.9 x 10^10 joules/kilogram
power=36,000,000 watts 

Specific power=1.238 kilowatts/kilogram 

momentum=5.58 x 10^9 meters-kilogram 

impulse=138,500,000 newtons-second 

Fuel flow=.00196 kilograms/second 

distance=to jupiter (880 million miles)

Time for journey=172 days (5.73 months)

How much antimatter is need if used=29.72 grams 

6. nuclear to jupiter-

velocity=117,720 meters/second (72.99 miles per second)

Exhaust velocity=58,860 meters/second 

Isp=6,000 seconds 

Mass ratio=2

Initial mass=3,500 tons 

Final mass=1,750 tons 

acceleration=. 012 meters/second^2
force=37,494.6 newtons 

Kinetic energy=2.2 x 10^16 joules 

Energy density=6.9 x 10^9 joules/ kilogram
power- 2.2 billion watts 

Specific power=16.61 kilowatts/kilogram 

momentum=3.7456 x 10^11 meters-kilogram 

impulse=3.7455 x 10^11 newtons-second 

Fuel flow=.3185 kilograms/second 

distance=to jupiter (880 million miles)

Time for journey=115.62 days (3.854 months)

How much antimatter is need if used=2.69 pounds 

7. breakthrough starshot to jupiter- (intended to go to the nearest star)
velocity= 15-20% light speed 

Initial mass=.001 kilograms 

acceleration=100,000 meters/ second^2
force=100 newtons
Kinetic energy=1.4 x 10^14 joules 

Energy density=1.4 x 10^17 joules/kilogram 

power=1.79 x 10^12 watts 

Specific power=1.79 x 10^12 kilowatts/kilogram 

momentum=45,000-60,000 meters-kilogram 

impulse=7.97 x 10^6 newtons-second
distance=to jupiter (880 million miles)
Time for journey=22.14 hours 

8. Daedalus fusion to jupiter- 

velocity=52,800,000 meters/second (32,736 miles per second, or 17.6% of light speed)
Velocity exhaust=5,280,000 meters/second 

isp=538,226.3 seconds 

Initial mass=about 50,000 tons
Final mass=5,000 tons (hypothetical)
Mass ratio=10 

acceleration=176 meter/second^2

force= 8 x 10^9 newtons 

Kinetic energy=6.34 x 10^22 joules 

Energy density=1.39 x 10^15 joules/kilogram
power=1.9 x 10^18 watts 

specific power=41.8 million kilowatts/kilogram 

momentum=2.4 x 10^15 meters-kilogram
impulse=2.67 x 10^14 newtons-second 

Fuel flow=1,363.53 kilograms/second 

distance=to jupiter (880 million miles)

time for journey=9.26 hours 

How much antimatter is need if used=3,874.4 tons 

9. tau to 1,000 AUs-

velocity=192,738.3 meters/second (119.5 miles per second)
Initial mass=59.81 tons 

acceleration=.0001233 meters/second^2 

force=6.72 newtons 

Kinetic energy=1.01 x 10^15 joules 

Energy density=18,570,000,000 joules/kilogram
power=661,395 watts 

Specific power=.0121 kilowatts/kilogram 

momentum=105.7 x 10^9 meters-kilogram 

impulse=102.94 x 10^9 newtons-second 

Fuel flow=.000356 kilograms/second 

distance=1,000 astronomical units 

Time for journey=48.54 years 

How much antimatter is need if used=(56.1 grams) 

10. breakthrough starshot to the nearest star-

velocity=15-20% of the speed of light 

Initial mass=.001 kilograms 

acceleration=100,000 meters/second^2 

force=100 newtons 

Kinetic energy=1.01 x 10^12-1.8 x 10^12 joules
Energy density=1.01 x 10^15-1.8 x 10^15 joules/kilogram 

power=2,852-1,901.3 watts 

Specific power= 2,852-1,901.3 kilowatts/kilogram 

momentum=45,000-60,000 meters-kilogram 

impulse=63 x 10^9-94.7 x 10^9 newtons-second 

distance=to Alpha Centauri (4.37 light years) 

Time for journey=20-30 years 

11. starship enterprise- (to the moon)
velocity-warp 1 (186,282 miles per second)
Initial mass=190,000 tons 

acceleration=116.71 x 10^6 meters/second^2 

force=2 x 10^16 newtons 

Kinetic energy=7.77 x 10^24 joules 

Energy density=4.5 x 10^16 joules/kilogram 

power=3 x 10^24 watts 

Specific power=1.75 x 10^13 kilowatts/kilogram 

momentum=5.18 x 10^16 meters-kilogram 

impulse=5.14 x 10^16 newtons-second 

Fuel flow=443.91 x 10^6 kilograms/second
distance=to moon (238,000 miles) 

Time for journey=2.57 seconds 

How much antimatter is need if used=474,833 tons 

12. starship enterprise- (to mars)

velocity=warp 1 (186,282 miles per second) 

initial mass=190,000 tons 

acceleration=243,579 meters/second^2 

force=4.21—10^13 newtons 

Kinetic energy=7.77 x 10^24 joules 

Energy density=4.5 x 10^16 joules/kilogram
power=6.31 x 10^21 watts  

Specific power=3.65 x 10^10 kilowatts/kilogram 

momentum=5.18 x  10^16 meters-kilogram 

impulse=5.18 x 10^16 newtons-second 

Fuel flow=140,292 kilograms/ second 

distance=to mars (estimate 114 million miles) 

Time for journey=1,231.2 seconds (20.52 minutes)

How much antimatter is need if used=474,833 tons 

13. VASIMR (FROM INTERNET)- (to mars)

velocity=34,020 meters/second (21 miles/ second)
Velocity exhaust=30,000-120,000 meters/second (from internet) 

Isp=3,058-12,232 seconds (from internet)
mr=3.108 (hypothetical estimate)

Initial mass=3,500 tons (estimate)
Final mass=1,126 tons 

acceleration=.0061 meters/second^2
force=19,409.63 newtons 

Kinetic energy=4.45 x 10^15 joules 

Energy density=1.4 x 10^9 joules/ kilogram (from internet)
power=1.32 x 10^9 watts 

Specific power=.415 kilowatts/kilogram 

momentum=108.25 x 10^9 meters-kilogram 

impulse=6.45 x 10^10 newtons-second 

Fuel flow=.9443 kilograms/second 

distance=to mars (estimate 142 million miles)

Time for journey=39 days How much 

antimatter is need if used=247.22 grams 

14. Conventional rocket- (to mars)

velocity=3.2-7.5 miles/second 

Velocity exhaust=4,513-4,562 meters/second
Isp=460-465 seconds
mr=3.138-14.35

Initial mass=3,500 tons (estimate) 

Final mass=1,115.5-243.9 

acceleration=.0000579-.000321 meters/second^2 

force=184-1,021 newtons 

Kinetic energy=4.236 x 10^13-2.24 x 10^14 joules 

Energy density=13.3 x 10^6-70.7 x 10^9 joules/kilogram
power=1.9 x 10^6-23.78 x 10^9 watts 

Specific power=.000597-7.47 kilowatts/kilogram 

momentum=16.42 x 10^9-38.66 x 10^9 meters-kilogram 

impulse=4.1 x 10^9-9.66 x 10^9 newtons-second 

Fuel flow=.1427-.3363 kilograms/second 

distance=to mars (estimate 142 million miles)

Time for journey=8.6-3.65 months 

How much antimatter is need if used=2.35-13.05 grams 

15. 25,000 year trip to nearest star 

velocity=157.17 miles/second 

Velocity exhaust=n/a
Isp=n/a
mr=n/a 

Initial mass=25 kilograms (estimate) 

Final mass=n/a 

acceleration=.00000008 meters/second^2
force=.000002 newtons 

Kinetic energy=8 x 10^11 joules 

Energy density=32 x 10^10 joules/ kilogram
power=1.8 watts specific 

power=.00004073 kilowatts/kilogram 

momentum=6,365,385 meters- kilogram
impulse=1,577,880 newtons-second 

Fuel flow=.000000000031688 kilograms/second 

distance=4.3 light years 

Time for journey=25,000 years 

How much antimatter is need if used=44.4 milligrams 

16. New horizon to Pluto 

velocity=10.28 miles/second (37,000 miles per hour) 

Velocity exhaust=n/a
Isp=n/a
mr=n/a

Initial mass=1,000 tons (estimate) 

Final mass=n/a 

acceleration=n/a
force=n/a 

Kinetic energy=1.26 x 10^14 joules 

Energy density=n/a
power=131,643 watts 

Specific power=.000475 kilowatts/kilogram 

momentum=15.14 x 10^9 meters-kilogram
impulse=n/a 

Fuel flow=n/a 

distance=3 billion miles 

Time for journey=9.25 years 

How much antimatter is need if used=7 grams 

17. Traveling to the nearest star at 3% of the speed of light. (hypothetical scenario)

velocity=. 03c
Velocity exhaust=3,908,605.34 meters/second
Isp=398,435 seconds 

mr=10

Initial mass=3,500 tons
Final mass=350 tons 

acceleration=.1426 meters/second^2
force=543,745 newtons 

Kinetic energy=1.29 x 10^20 joules 

Energy density=4.05 x 10^13 joules/kilogram 

power=4.09 x 10^12 watts 

Specific power=.1,285.43 kilowatts/kilogram 

momentum=1.386 x 10^14 meters-kilogram
impulse=14.32 x 10^9 newtons-seconds 

Fuel flow=.1008 kilograms/second 

distance=2.84 x 10^14 miles (boost) 

distance=<4.3 light years (coast)

Time for journey=1 years (boost)
Time for journey=140.736 years (coast)

How much antimatter is need if used=7.88 tons 

                                                                          Spaceflight formulas 

Meaning of variables in the formulas—

v=velocity (meters/second) 

vi=velocity initial (meters/second) 

vf=velocity final (meters/second) 

vexh=exhaust velocity (meters/second) 

isp=seconds 

m=mass (kilograms)
mi=initial mass (kilograms)
mf=final mass (kilograms)
mr=mass ratio
a=acceleration (meters/second^2) 

f=force (newtons)
d=distance (meters)
t=time (seconds)
ke=kinetic energy (joules)
ed=energy density (joules/kilograms) 

p=power (watts)
spp=specific power (kilowatts/kilograms) 

mm=momentum (meters x kilograms) 

i=impulse (thrust x seconds)
fr=fuel rate (kilograms/second) 

mw=molecular weight
texh=temperature exhaust (kelvin) 

eff=propulsive efficiency
r=radius (meters)
ecc=eccentricity
g=acceleration due to gravity
(9.91 meters/second^2) 

ROCKET EQUATIONS—

Rocket equation—
velocity
v=vexh x ln(mi/mf)
v=(d x 2)/t (when accelerating) 

v=d/t (constant velocity) v=sqrt(2 x a x d) 

Velocity of exhaust vexh=v/ln*(mi/mf) 

vexh=.25 x sqrt(texh/mw) 

Isp—
isp=vexh/9.81 

isp=f/(fr x 9.81) 

isp=vf/(ln(mr) x 9.81) 

Mass ratio—
mr=mi/mf 

mr=e^(v/vexh) 

mr=e^(vf/(isp x 9.81)) 

Mass final— 

mf=mi/(e^(vf/vexh) 

Mass initial— 

mi=mf x e^(vf/vexh) 

Mass—
m=f/a
m=2 x ke/v^2 

Force—
f=m*a
f=ke/d
f=9.81 x isp x fr 

acceleration—

 a=f/m 

a=2 x d/t^2 

Energy—
ke=1/2 x v^2 x m 

ke=d x f
Energy density (rest mass energy)—
ed=ke/m
Fuel flow rate—
fr=f/vexh
fr=m/t
Distance—
d=v*t/2 (with respect to accelerating)
d=v x t (constant velocity)
d=ke/f
Time—
t=(d x 2)/v (constant acceleration)
t=d x v (constant velocity)
t=((m x vf)^2/2)-(m x mi)^2/2) x (1/f) x (2/vi+vf)

Power— 

p=ke/t
p=f x d/t 

Specific power—

 sp=(p/1000)/m

Momentum—

 M=v x m 

Impulse—
i=f x t
Antimatter needed (kilograms)—

m=ke/1.8 x 10^16 

Propulsive efficiency—
eff=2/(1+(vexh/vf)) 

eff=(vf/vexh)^2/(e^(vf/vexh)-1)
(Maximum efficiency for ratio- vf/vexh<1.6) 

eff=f x g x isp/2 x p 

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s