Nessie: Rack and Pinion

Fri, 12 Oct 2012

Further progress on the Nessie project…

I've reduced the number of pinion teeth from eight to seven. The dimensions of the zig-zag piece that make the teeth have stayed the same but the extra spacing now gives the sides of the teeth more of a slope.


I've changed the way the hump wheels are constructed. The wheel is now made from two donuts and a rim. This extra space makes construction much easier.


The axle support pieces are then glue into place and the axle added.


The finished hump wheel.


Two humps will then sit above the main slider which is, in turn, driven by the scotch yoke.


From the front it will look something like this. I'll be adding a Loch Ness surface just above the level of the axles and there will be a handle attached to the drive shaft in the front centre of the box.

Comments (4)

  • Tank Commander October 12, 2012 at 6:04 pm

    Awww wow! 🙂 This looks

    Awww wow! 🙂 This looks really good! I can't believe that you have done so much in so little time! It looks good! 🙂 

    • umehta October 12, 2012 at 6:43 pm

      michael42er was right when he

      michael42er was right when he had said on the other day,

      Later it's gonna look a lot better.

  • cool022883 October 12, 2012 at 8:05 pm

    yes the models always look a

    yes the models always look a little rough when hes just working out the parts but once he gets all the parts figured out he always makes the models look great for us.this model is going to be so fun to make when its finished.

  • leonardos October 15, 2012 at 1:20 am

    Hey Rob:  Thank you for

    Hey Rob:  Thank you for showing us the process of your thinking, that is as interesting as the completed project itself!  We just love your website, have been sharing it with other students.

    You’re welcome – RI

Comments are closed.