Nuke Dukem Model Rocket - Extreme Series

Introduction:

The Extreme Series of Builders Kits were designed to print, assemble, and fly easily.  These rockets can be flown on lower-powered motors in a park, or with higher-powered 24/29mm motors.  Typically, an Estes F15 can loft these rockets to over 1000 ft, thus the name Extreme.  

The construction is simple.  This model includes a one-piece fincan with the fins attached.  The inside diameter of the fin can is designed to be lined with a 29mm motor tube.  Between this tube and the fin can is a small channel for a piece of kevlar kite string (~1mm thick).  This should also be epoxied in.  

The motor retention ring will slip onto the end of the motor tube and be glued with epoxy.  The nose cone can be flown in two configurations, with the electronics sled or with the plug.  Both are identical except the plug does not incorporate the sled.  They will accept a ¼-20 eye-bolt.  Both include two holes for venting altimeters and routing e-matches for electronic deployment.

Also included is a detailed OpenRocket simulation file with potential motors that should work.  You will want to download the accessories pack found HERE.  All of these parts will work interchangeably with the BT60 Extreme Builder's kits and are sized around Estes's standard BT60 body tubes.

If you print and enjoy this model, please consider clicking the LIKE (Heart) button and posting a Make.  It really helps me and I would love to see other models made from this.

Models Included:

• Nosecone
• One-piece Fincan - Requires support
• Optional body tube
• OpenRocket Simulation File (WIP)
   

Accessories (found Here):

• Electronics bay Sled
• Nosecone Plug
• Motor Retainer ring and cap
• BT60 Tube Cutter
• 1010 Rail Guides and Buttons - Choose your preference
• ¼-in Launch Lugs - Short and Long

Materials Needed:

• BT60 Estes Body Tubing
• Approximately 6 ft or 1800mm of Kevlar shock cord – approx 1mm diameter.  I use Emma Kite String made of Kevlar from Amazon
• 29mm Motor Mount tubing (MMT) -  I use LOC tubes but Estes or Apogee will work too
• 15 (or more)-minute epoxy
• ¼-20 eye-bolt (or two) for the sled/plug
• 18in parachute and wadding or fire blankie
• OPTIONAL:  Reflective Tape and/or mylar strips as added streamer material – This rocket is small and hard to see when lofted over 1000 feet.

Building Guide:

Before starting, read this.  If it's not clear, send me a message.  I am happy to answer any questions.  

Starting with the fin can, your motor tube (MMT) should be as long as the fin can plus the retaining ring.  I suggest using a longer tube and after the MMT and ring are glued, trimming the excess off at the ring.  Dry fit your MMT into the fin can.  If you encounter moderate resistance, either sand the inside of the fin can or sand/peel the top layer of the motor tube until you can slide the tube in without kinking it.  If you kink the tube, the motor will not insert easily and can become jammed after flight.  

Once the dry fit is complete, run one end of your shock cord down from the forward end until about 25mm (1 in) is sticking out the back.  Apply a thin coat of epoxy to the aft end of the MMT and slide it in from the forward end until about 15mm sticks out the aft section.  You must align the shock cord in the internal channel that was modeled to accommodate it.  Take your retention ring, slide it onto the end of the tube, and push it up until the ring is seated on the aft end of the fin can, pinching the shock cord.  Make sure everything is aligned and seated then set aside to dry.  Clean any excess epoxy from the fin can, retention ring,  or inside of the MMT with Rubbing Alcohol.

Next, you will need ~ 9-in (228mm) of Estes BT60 body tubing.  Use the included body tube cutter to trim off the desired length.  You can cut the tube back to the desired length after assembly (mine was about 9 inches).  Apply a film of epoxy to the inside aft end of the tube and slip it over the fin can.  Give the tube a little twist to make sure there's good coverage.  Make sure to feed the shock cord through.

Safety Police Disclaimer:  

Rocketry is a safe and rewarding hobby.  With knowledge and experience, you can experience the excitement of yeeting a rocket thousands of feet into the sky.  There is nothing else like it.  

Having said that, you are responsible for the rockets you fly.  If you build and fly one of these rockets, you should understand the NAR Safety Code and the potential risks involved with launching any rocket, especially these.  They were not designed to be toys.  They are real rockets that can potentially go very high and carry significant energy.  This rocket is intended to be built and flown by experienced rocketeers who understand the risks and can mitigate potential issues through experience.  By printing and flying this model, you do so at your own risk.  You are solely liable for any unexpected results and you agree to hold me and any manufacturer harmless of any liability.  I recommend you join NAR or Tripoli, join a club, and ask lots of questions.  Launching a rocket as a NAR/TRA member at a sanctioned event provides you with insurance you don't get at the park.  </end of Safety Rant>