Madcow (4" Fiberglass) Super DX3 (K-159) Basic Information. Madcow Rocketry MODEL NAME: 4" Fiberglass Super DX3 Also known as: NUMBER: K-159 Introduced: Final Year: Designer: Type: Sport Motor Mount: 1x54mm or 1x75mm Recovery: Parachute Stages: 1 Length: 66.5" Diameter: 4" Span: Weight: 6 lbs Mfg. Description: Features: ALL FIBERGLASS KIT High Power Rocket Pre-Slotted Fiberglass Airframe Fiberglass Nose Cone G10 Fins and Centering Rings Rail Buttons Altimeter Bay Upgrade includes extra bulkplates and hardware (Madcow 2013 Web Ad) Advertising Liveries 2013 Web Ad Face Card(s) Instruction Header(s) First post in this thread featuring this rocket. See Also: TRF Build Threads TRF Applicable Threads LINKS EMRR RocketReviews Mfg. Page If you have any additional information on this rocket and/or catalog photos please let us know.