Thursday, August 28, 2014


INTERSTELLAR flights could take centuries.
Fortunately, g-force could reduce this to a few years.

Unfortunately, fuel can severely limit duration/distance for interstellar g-force voyages; though, fuel is not a problem for interplanetary flights.  G-force vessels can easily carry sufficient fuel to accelerate at constant g-force throughout a trip to Mars, which would take a few days and only a few percent of the ship's mass for fuel.  However, interstellar vessels would easily consume well over 100% of its weight in fuel during the multi-year voyage.

Thus, interstellar ships will separate their voyages into three phases:
  • G-force for about a year to accelerate to a high percentage of light speed.
  • Conserve fuel by cruising for a few years at this speed to save fuel (maintain gravity via longitudinal spin).
  • Decelerate back to an orbital speed to conduct interplanetary operations at the destination star.


1. INTERSTELLAR SCENARIOS.  TE has grouped most common scenarios into 1) Theoretical 2) Feasible 3) Practical.  Which technologies are most likely and therefore most practical? Let's focus on them.
2. PUSH TOWARD INTERSTELLAR. Interplanetary performance envelope will need considerable "pushing" for interstellar flights. Particle exhaust speeds must be at least 86.6% light speed (.866 c).
3. ACCELERATE FOR A YEAR: Compare spaceship's g-force speeds with c, light speed. See associated 1G TABLE: Accelerate for 1 Year.
4. DETERMINE DUE DISTANCE.  Use exponential to determine g-force interstellar speeds;
from integral calculus, use integral to determine distance duly traveled.
5. TO NEIGHBOR STARS: Between accelerating and decelerating, stellar flights need a lengthy cruise phase.
6. PRACTICALITY: CONSIDER INEFFICIENCY G-force acceleration requires mass/energy conversion. Since spaceship has limited mass; it has limited range. Practicality limits range even further  due to inevitable inefficiency.
7. DYNAMIC EFFICIENCY FACTORMake the feasible range more practical with a dynamic efficiency factor which inversely correlates with vessel performance (exit particle velocity).
8. TOTAL TIME DILATION:  Can easily compute large part of time dilation during constant speed cruise;
much more difficult to compute time dilation for dynamic speed of acceleration/deceleration portions.
9. HELIUM-3, WILL IT GET US THERE? No, but it'll keep us warm during the trip;
thus, He-3 might very well prove essential for space travel.
10. INTERSTELLAR RAMJET might enable inflight refueling. The interstellar ramjet (proposed by Dr. Bussard in 1960) is a possible solution to the inherent transportation problem of having to carry enough fuel to power entire flight.
11. INTERSTELLAR SUPER G.  Greater than g-force propulsion can be an enormous help to interstellar travelers.   See associated 7G TABLE: Accelerate for 100 Days.
12. SNOWBALL FROM OORT  Sol's boundary cloud contains "trillions of comets" which could benefit humankind enroute to the stars.  See associated 7G TABLE: Decelerate for 48ΒΌ days.
13. MORE SNOWBALLS  More ways to throw more snowballs. See associated 1G TABLE: Decelerate for 1 Year.
14. INTERSTELLAR COMMUNICATIONS Maintaining contact will prove challenging.
Maintaining huge data flows over extremely lengthy, stellar distances will prove even more so.
15. STELLAR LIGHTHOUSES Like Earth's coastal lighthouses, neighboring stars can help us avoid enroute hazards. Singularities are especially insidious.
16. OCTANTS: TE's way of displaying our neighboring stellar systems.
Thus, far humanity has discovered about 25 such systems within 15 LYs of Sol.
17.  BEARINGS can help vessels precisely track remaining distance.
This will prove essential for decelerating at exact, required distance to destination.
Eventually, interplanetary flights will become routine. When they do, the practicality of interstellar flights will become imminent. "Going Asteroidal" (leveraging asteroids for traveling and dwelling) will be an integral part of both interplanetary and interstellar travel.



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