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Old 08-06-2016, 10:48 AM
gary
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gary is offline
 
Join Date: Apr 2005
Location: Mt. Kuring-Gai
Posts: 5,999
Back of the envelope comparison to Space Shuttle energy usage.

The Space Shuttle SRB's delivered 9.875GW for 123.7 seconds
and the SSME delivered 1.9875GW for a maximum of 761 seconds.
A total of around 2.73GJ of energy.

A 100GW laser for 240 seconds is equivalent to 24GJ.
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