http://www.redcross.org/

  this site requires the use of the back button of your browser

http://www.marssociety.org/

site content

. freeware content

• safety
• performance_computer
• utility description
• legal stuf
• download
• install

link content

• official web sites
• interesting sites
• kits parts plans
• airplane designer
• ray tracer
• entertainment sites
• home pages
• projects
• space technologies
• hypersonic

using the freeeware  

• design goal
• engine concept
• command help

help on some of the freeware command

• Payload
• Empty / gross wt ratio
• fuel weight ratio
• aspect ratio
• Cl max
• Cruise speed
• Equivalent flat plate
• Wing loadingcorection
• The flight envelope
• Saving the files
• Opening the files
• Deleting the files
• The files information
• The airfoil design

freeware historic

freeware screenshot   big files slow !

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