starship-design: Antiproton-Catalyzed Propulsion System

["Christoph Kulmann" <guderiak@hotmail.com>]

Hi Folks,

I have a question about the fuel-to-payload mass ratios of your 
starships. In 

http://sunsite.unc.edu/lunar/school/InterStellar/Explorer_Class/External_fueled_Drive.html

you give a detailed list of fule:dryweight ratios to accelerate a ship 
to 1/3  light speed, ranging from 55:1 to 500,000,000:1.

As you know, there is an interesting drive concept at PSU called 
ICAN-II. 
(http://antimatter.phys.psu.edu/ICAN-II_Paper)

Now assume you equip your Explorer Class Starship with an ICAN-II drive, 
what mass ratio would be required to accelerate it to 1/3 light speed? 
With the original dryweight of 500,000 tons and without using  a fuel 
launcher...

Well, they don't say it that clearly, so I'm asking...

So long

Christoph Kulmann



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