This Expansion Pack for the Jarvis Heavy Launch Vehicle add two more versions to the rocket family:
Jarvis-Centaur: the smallest and cheapest version of the rocket. The first stage JS-1 is the only piece of the Jarvis hardware utilized in this version, combined with a standard upper stage Centaur via interstage adapter ad with a new, smaller payload fairing. This version has a payload capacity of 22,800 Kg to LEO (the same class of Delta IV Heavy and Ariane 5 launchers).
Jarvis-L ("Light" version): the second smallest version of the rocket, with a standard 8.4 meter fairings. This version has a payload capacity of 27,900 Kg to LEO (roughly equivalent to the future Falcon 9 Heavy, Atlas V Heavy or russian Angara rockets).Overwrite all the old files. Â Required Jarvis Heavy Launch Vehicle add-on.http://www.orbithangar.com/searchid.php?ID=4527
 News in the version 1.1:
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Updated scenarios, now for Orbiter 2006 and 2010.
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Simplified launch procedure from Cape Canaveral.
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Some surfaces modified.Â
 News in the version 1.5:
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Redone meshes and textures, with  more realistic details. Read the list of the obsolete texture files on the doc\jarvis\Exp1_README.txt.