Shastas Rocket Site

Hydra VII

SEMROC Model #KV-29


The Semroc Hydra VII was designed in 1969 to be a high performance large cluster payload rocket. Named after a multi-headed monster in Greek mythology, the Hydra was a monster of a rocket with seven C engines. The Retro-Repo Hydra VII was updated by using laser cut balsa fins and a Kevlar shock cord attachment. The original paper augmenter shroud has been replaced by a much sturdier spiral tube. The original two 12″ parachuted have been increased to three.

Additional Information

  • Length: 30.5″
  • Diameter: 1.64″
  • Weight: 5.2 oz.
  • Decals: Colorful Waterslide
  • Fin : Laser Cut Balsa
  • Fin Span: 6.9″
  • Nose Cone: Precision Turned Balsa
  • Recovery: 3 x 12″ Parachutes
  • Recommended Motors: 7 x C6-7


Photo Gallery

Build History

  • 03/08/2004 – Purchased Semroc Hydra VII from Semroc for $23.00 (Retail $23.00)
  • 07/08/2004 – Opened kit to scan plans for Dave.



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