Jump Sail

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Jump Sail

The Jump Sail or Energy Collector Sail is the primary method of charging a JumpShip's Kearny-Fuchida Drive.[1] Invented and prototyped by the Terran Hegemony around 2200, they had evolved out of their primitive early prototype versions by 2300, and were in common use by 2335.[2]


The sails are used to recharge the Kearny-Fuchida Drive on a JumpShip, which enables the JumpShip to traverse interstellar space in 30 light-year "jumps". The drive is very fragile and Jump Sails are the best way to slowly charge the drive. The sails themselves are between 800 and 1,300 meters in diameter. Created from a high strength polymer, a Jump Sail is coated in an extremely efficient photochemical that absorbs visible light, infrared, ultraviolet, and microwave radiation. This radiation is converted into electrical power and fed into the KF drive. One byproduct of the photochemical's efficiency is that jump sails are invisible to most deep space radar systems.[1]

Since the jump sail must be so large, the polymer is very thin and easily torn by micrometeorites, interstellar dust, and rough handling. As a result, the crew of a JumpShip takes between 100 and 200 minutes (1.5 to 3.5 hours) to extend or retrieve the sail. In addition all jump sails have a large hole in the center which allows the exhaust from the JumpShip's fusion engine to pass through without damaging the delicate sail.[1]


Jump Sails are manufactured on the following planets:

Brand Planet Company Used by References
Forerunner I Tamarind Forerunner A.G. ??? [citation needed]
Forerunner III Tamarind Forerunner A.G. ??? [citation needed]
Forerunner IV Tamarind Forerunner A.G. ??? [citation needed]


  1. 1.0 1.1 1.2 DropShips and JumpShips (Operations Manual), p. 12, "Energy Collector Sail"
  2. Interstellar Operations, p. 42