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Commercial and US Government Launch Vehicles => NGIS (Formerly Orbital ATK) - Antares/Cygnus Section => Topic started by: edkyle99 on 09/29/2007 03:40 am

Title: Orbital (Sciences) Boost Vehicle (GMD Boost Vehicle) Success
Post by: edkyle99 on 09/29/2007 03:40 am
An Orbital Sciences GMD Boost Vehicle (Orbital Boost Vehicle) successfully intercepted a Polaris/STARS target missile on September 28, 2007, scoring the second Ground based Mid-Course Defense system operational intercept.  The target launched from Kodiak.  The interceptor, which is basically a Pegasus without wings, lifted off from Vandenberg AFB LF-23 at either 20:16 or 20:18 UTC, depending on source.

http://www.vandenberg.af.mil/news/story.asp?id=123070079
http://www.mda.mil/mdalink/html/mdalink.html
intercept video
http://www.mda.mil/vids/Sept_28_2007_Interceptvideo.wmv

 - Ed Kyle
Title: RE: Orbital (Sciences) Boost Vehicle (GMD Boost Vehicle) Success
Post by: guidanceisgo on 10/04/2007 03:38 am
Quote
edkyle99 - 28/9/2007  10:40 PM

The interceptor, which is basically a Pegasus without wings, lifted off from Vandenberg AFB LF-23 at either 20:16 or 20:18 UTC, depending on source.


 - Ed Kyle

The Pegasus without wings is a great simplification.  Just say it uses the same motors as Pegasus and you would be correct.  It really is very different in all other systems
Title: RE: Orbital (Sciences) Boost Vehicle (GMD Boost Vehicle) Success
Post by: Skyrocket on 10/05/2007 07:05 am
Quote
guidanceisgo - 4/10/2007  5:38 AM

Just say it uses the same motors as Pegasus and you would be correct.  

not even this would be correct, as the first stage of the OBV has thrust vecttor control, whereas the Pegasus first stage has not.

Title: Re: Orbital (Sciences) Boost Vehicle (GMD Boost Vehicle) Success
Post by: guidanceisgo on 10/06/2007 09:42 pm
Good catch.    Plus there is no wing attachment hardware on the motor.
Title: Re: Orbital (Sciences) Boost Vehicle (GMD Boost Vehicle) Success
Post by: tnphysics on 10/06/2007 10:04 pm
Why does the Pegasus stage 1 not need TVC?
Title: Re: Orbital (Sciences) Boost Vehicle (GMD Boost Vehicle) Success
Post by: Skyrocket on 10/06/2007 10:35 pm
Because it has aerodynamic steering by its movable fins

Title: Re: Orbital (Sciences) Boost Vehicle (GMD Boost Vehicle) Success
Post by: tnphysics on 10/06/2007 11:02 pm
That's what I expected.