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.  Thought Experiment (TE) assumes the most practical technologies are the most likely; thus, TE will 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: LIMITED RANGE G-force acceleration requires mass/energy conversion. Since spaceship has limited mass; it has limited range. Inevitable inefficiencies limit range even further.
7.  DYNAMIC EFFICIENCY FACTORMake the feasible range more practical with a dynamic efficiency factor which inversely correlates with vessel performance (exit particle velocity).
8.  HELIUM-3 WILL WARM US. He-3 might very well prove essential for space travel. (NOTE: Initial store of He-3 might not last the entire journey. Thus,   INTERSTELLAR RAMJET might collect interstellar particles to augment He-3 power generation.)
9.  INTERSTELLAR SUPER G.  Unmanned Artificial Intelligence (AI) controlled vessels can use greater than g-force propulsion to resupply manned, interstellar vessels between the stars.  See associated 7G TABLE: Accelerate for 100 Days.
10. SNOWBALL FROM OORT  From Oort's many comets, construct ice encased vessels to travel at interstellar super G throughout our stellar neighborhood.  See associated 7G TABLE: Decelerate for 48ΒΌ days.
11.  MORE SNOWBALLS  Interstellar travelers might need multiple resupplies throughout their voyage.  Thus, TE proposes more ways to throw more snowballs. See associated 1G TABLE: Decelerate for 1 Year.
12. ENHANCED TIME DILATION TO AC. Snowballs might enable vessels to g-force accelerate for 712 days to attain 86.6%c; then, on board observers will measure time at 1/2 the rate as Earth observers. (NOTE: Without "snowballs," g-force max range might be only one year for only 64.4%c; thus, STANDARD TIME DILATION TO AC:.)
13.  INTERSTELLAR COMMUNICATIONS Maintaining huge data flows over extremely lengthy, interstellar distances will likely involve well planned placement of AI controlled, interstellar beacons.  However, these useful devices could become collision hazardous.
14.  STELLAR LIGHTHOUSES Like Earth's coastal lighthouses, neighboring stars can help us avoid enroute hazards. Singularities (aka "Black Holes") are especially insidious.
15.  HUBS: Sol's closest stellar neighbors can help humanity travel to even further stars. Vessels can stop there to replenish resources before traveling on. To better understand "hub" concept, also consider following.  OCTANTSTE groups neighboring stellar systems (perhaps 51 within 15 LYs) into 8 octants. BEARINGS can help vessels precisely track distance along the course line.
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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