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My Scratchbuilt MRRC Cobra

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  • My Scratchbuilt MRRC Cobra

    I built this car recently to enter in the 2020 SCCA proxy. It turned out to be a great handling little car, especially for one of these proportions.

    Here are some specs of what was used:

    Cut down WRP guide tongue
    Samson Classics spigot mount guide post
    Scaleauto wood guide
    Front wheels are stock 15.8x8.5 rear wheels
    Rear wheels are 15.8x8.5 Slot it Air wheels
    NSR Gt40 wheel inserts
    NSR Supergrips in back
    Policar 25k
    Professor Motor Forged brass motor bracket
    The driver is a pioneer, and the interior was made from postcard. The "leather" cockpit cover, is just a trick I learned from a model builder using masking tape and a sharpie to create a leather look.

    The chassis is a torsion design, picked up from Chrisguyw's amazing builds. I used .055 main rails, with .032 on the flex section. The center pivot pin is .062 wire inside 3/32 square tubing.

    I also employed independent front wheels. It needed more weight down low, and with minimal room I decided to put a piece of .032 brass on the bottom of the motor. I soldered the motor in to make sure it could not move with the extra weight, and then just lightly soldered the brass ballast to the motor can.

    Very fun and smooth car to run!

    Click image for larger version

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  • #2
    Great build! Tough competition.....
    Come Race at The Trace!
    Timberline Trace International Raceway - SW of Mpls, MN


    • #3
      I can say with out any question that body has never gone as fast as it has with that lovely chassis Zack built for it...
      THE other Vancouver aka Vancouver Washington across the river from keep Portland weird....
      Member NASTE (Northwest Association of Slot Track Enthusiasts)


      • #4
        Now THAT is what it needed! Great work sir.


        • #5
          Nice looking car Zack! Does that chassis handle to your expectations?


          • ZackM
            ZackM commented
            Editing a comment
            Actually much better than expected!


        • #6
          Looks very similar to the chassis I built under the Lotus 40 I entered

          G.P Alberta


          • #7
            That's good news Zack!


            • #8
              So far so good for the little Cobra. Qualifying last night for the SCCA proxy and the car qualified 5th outright, just a few tenths off the GT40's. Very smooth handling and good power!

              Click image for larger version

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