MAD COW Model #K-128


High Power Rocket
Heavy Duty Plastic Nose Cone
1/4″ Plywood Laser Cut Fins and Rings
Delrin Rail Buttons
Pre-slotted Airframe
9/16″ Tubular Nylon Shock Cord

Additional Instruction

Length: 28.5″
Diameter: 4.0″
Weight: 30oz
Motor Mount: 38mm
Fins: 1/4″ Plywood


Photo Gallery

Build History

  • 12/08/2007 – Took pictures of package and contents.
  • 01/11/2008 – Scanned components and measured components. See page 80 Book #3. Epoxied retainer onto end of motor mount tube with KB Weld after sanding tube to fit retainer.
  • 01/12/2008 – Epoxied centering rings to motor mount tube with 30 minute epoxy. Epoxied motor mount assembly into body tube with 2 hr. epoxy. Attached fins using 30 minute epoxy and filleted fin joints with 5 minute epoxy.
  • 01/13/2008 – Filleted aft motor mount centering ring to body tube with 5 minute epoxy. Linda sewed 1/2″ tubular nylon to D link on both ends. Marked body tube half way between fins and drilled each centering ring with #25 bit. screwed rail buttons bolt into hole, removed it and placed 6 drops of 2 hour epoxy into each hole. Rethreaded the bolt into the hole until the button still turnde but was not loose. Attached one end of tubular nylon to eye bolt in upper centering ring.
  • 01/20/2008 – Taped nose cone hole with 1/4″ #20 tap. Threaded screw eye into hole and removed it. Epoxied screw eye into hole with 15 minute epoxy. Affixed screw eye with more 15 minute epoxy.


DateLocation #MotorComments
01/18/2009Sim’s FarmBS27G67RJumped off the pad.
01/18/2009Sim’s FarmBS27G61WNice lazy flight.
01/18/2009Sim’s FarmBS27H123WCOWABUGA.
05/15/2010ADC ParkBS41F59-5CTI 1 grain.
05/15/2010ADC ParkBS41G57-5CTI 2 grain.
08/07/2010ADC ParkBS43G79-6SSGreat black smoke trail on George’s first CTI reload preparation.
08/07/2010ADC ParkBS43G115-6WThe G got this model up there higher than I expected.
09/18/2010ADC ParkBS44G78-10The only model flown from the high power pad.
01/09/2011Sim’s FarmTRA3I285REarly Ejection Separated the Nose Cone and part of the body tube above the fins. All parts were recovered. That was a heck of a zipper.
09/17/2011ADC ParkBS52G115-9Good flight. Visitors helped me recover the model NNE of the launch Pad.






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