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Revision 1 as of 2019-01-15 05:30:30
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Revision 2 as of 2019-01-15 05:35:15
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 * Launch loops are assembled over and float the ocean for safety and security
  . A good place is 8 degrees south, 120 degrees west, west of Ecuador and south of San Diego
   . The "most boring weather in the world" according to one meteorologist
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  . Aerodynamically shaped launch vehicles are 5000 kg riding above a 2000 kg magnet sled   . Aerodynamically shaped launch vehicles are 5000 kg, and ride above a 2000 kg magnet sled
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  . After payload release, sleds are decelerated and reused   . After payload release, sleds are decelerated, retested, repaired, and reused
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  . at 30 m/s² (≈ 3 gees) payload acceleration to 11.1 km/s exit velocity:
   . 370 seconds of acceleration, and a 2053 km launch path.
  . at 150 m/s² (≈ 15 gees), the empty sled stops in 74 seconds over 411 km
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  . at 30 m/s² (≈ 3 gees) payload acceleration to 11.1 km/s exit velocity, that is:
   . 370 seconds of acceleration, and a 2053 km launch path.
  . at 150 m/s² (≈ 15 gees), the empty sled stops in 74 seconds over 411 km.
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   . Larger objects must be dodged or intercepted.    . Larger debris objects must be dodged or intercepted.
 

Short Intro

  • Launch loops are assembled over and float the ocean for safety and security
    • A good place is 8 degrees south, 120 degrees west, west of Ecuador and south of San Diego
      • The "most boring weather in the world" according to one meteorologist
  • Launch vehicles will travel on a magnetically levitated and coupled sled
    • Aerodynamically shaped launch vehicles are 5000 kg, and ride above a 2000 kg magnet sled
    • Magnet sleds (perhaps 50 meters long) couple to the rotor through a velocity transformer track

    • After payload release, sleds are decelerated, retested, repaired, and reused
  • Launch loops must be very long
    • at 30 m/s² (≈ 3 gees) payload acceleration to 11.1 km/s exit velocity:
      • 370 seconds of acceleration, and a 2053 km launch path.
    • at 150 m/s² (≈ 15 gees), the empty sled stops in 74 seconds over 411 km
    • A 2500 km launch path means a 6000 km total rotor length
  • The launch loop rotor masses 3 kg/m, with a 4 cm hexagonal cross section
    • Each hexagonal is a row of iron-faced bolts, each perhaps 10 meters long.

  • Launch loop launch altitude is 80 km
    • Post-release payload drag and blunt nose heating will be significant but not extreme
    • The tenuous atmosphere above 80 km will deorbit smaller (and hard to track) space debris
      • Larger debris objects must be dodged or intercepted.

ShortIntro (last edited 2019-01-15 07:39:38 by KeithLofstrom)