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   sci.space.tech      Technical and general issues related to      3,113 messages   

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   Message 2,606 of 3,113   
   Michael Smith to Brucebo   
   Re: Sub-G thrust to orbit.   
   01 Mar 05 11:46:03   
   
   From: smithm@SPAMBLOCKnetapps.com.au.retro.com   
      
   On 28 Feb 2005 11:02:17 -0800   
   "Brucebo"  wrote:   
      
   > Is is possible to make it into earth orbit using a sub-G thrusting   
   > rocket motor together with a hypersonic lifting body?   
      
   Airfoils (including lifting bodies) lose efficency once they hypersonic.   
   That, combined with the higher drag at hypersonic speeds will make it   
   impossible to continue acceleration with sub-G thrust.   
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   Michael Smith   
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