gas giants

Let me put it another way (than my prior 
Jupiter-esque question):

1) What is a reasonable guess of core radius 
and edge of atmosphere radius (if we assume 
140K km for Jupiter, 7" to edge of 
atmosphere.... but how much is core?). 

2) What is the surface gravity of Jupiter guessed 
to be?

3) Would there be any combat possible in the 
atmosphere or would sensors and such 
effectively be blind? Would beams be diffused 
so much as to make them useless? Torpedos? 
K-guns? SMRs? Fighters? How would the gas 
giant atmosphere (and any gravity issues) 
affect them? Thoughts?

Tomb. 

PS - B2B --> No, there will be no obelisks. Hal 
says so. 

---------------------------------------------
Thomas Barclay
Co-Creator of http://www.stargrunt.ca 
Stargrunt II and Dirtside II game site
"In God We Trust... on Cold Steel We Depend."