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((more citations needed|date=May 2010))
'''Viper Dart''' is an American [[sounding rocket]] originally developed in 1972. Space Data Corporation (SDC) developed the vehicle as a mean to increase the apogee of the [[Super Loki]] boosted PWN-12A dart. The PWN-12A dart is the non-propulsive second stage that contains a [[ROBINSphere]] (Radar OBservable INflation Sphere). The ROBINSphere is a calibrated weight inflatable 1 meter diameter radar reflecting balloon, weighing in at about 150 grams.  The weight is measured within one-half gram.<ref name=ROBINSPHERE>((cite web|last1=Robert Leviton|first1=John B. Wright|title=ACCURACY OF DENSITY FROM THE ROBIN|url=http://handle.dtic.mil/100.2/AD0274213|archive-url=https://web.archive.org/web/20151223072045/http://handle.dtic.mil/100.2/AD0274213|url-status=dead|archive-date=December 23, 2015|website=Armed Services Technical Information Agency Arlington Hall|publisher=US ARMY|access-date=29 October 2015))</ref>

[[Image:Viper-dart.jpg|thumb|left|Nasa Image: Launching of a Viper Dart Rocket]] The Viper IIIA boosted PWN-12A dart has a maximum apogee of 120&nbsp;km (74.56&nbsp;mi), a diameter of 0.11 m and a length of 3.40 m.

The Viper II version had a ceiling of 150&nbsp;km, a diameter of 0.18 m and a length of 3.40 m. This vehicle configurations flew less than 100 missions as a meteorological rocket and last flew in 1988 at White Sands Missile Range, NM..

==References==
((Reflist))

==External links==
* [https://web.archive.org/web/20150828190759/http://www.astronautix.com/lvs/viprdart.htm Viper Dart]

[[Category:Sounding rockets of the United States]]


((Rocket-stub))

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