Paul
What material did you end up using for the elastic dampers. I thought originally you had planned on using hardware store silicone. I had an experience with silicon trying to make scupper plugs for a sit on top kayak. I use the kayak on calm lakes so I didn't want the scupper holes open. I know you can buy silicone for moulding, but for small rate one-off items, every Wal-Mart and Home Depot has the GE Silicone II.

I tried three different brands of silicone, Dap, Ace (store brand), and GE Silicone II. The GE brand was the only one that would cure in any reasonable amount of time in that great of thickness. The Dap and Ace brand would not cure in a three day period of time in that thickness at greater than 70 deg. F and less than 20% humidity. FYI, 3M 77 was used to glue the skeg on.
Alan Mullen Colorado



  Paul,  I am thinking of getting an alloy spacer made to finalise my
  flexdrive.  It has to bolt onto the 6 bolts that hold the flexplate
  to the E shaft (or is that 8 bolts?)  So it has to be a circular
  plate (spacer) that is approx 30mm high which then holds my cushion
  drive up from the flexplate by that distance.  Probably gotten
  everyone confused by now, but the question is who can do this drawing
  for me so it can be fed into a CNC mill.  My mates here are too busy
  at the moment and could take up to 6 weeks then  the wait to get it
  done.  It is very basic, and uncomplicated, so to speed things up I
  am looking elsewhere at the moment.

  Neil Unger

  Make a pencil and paper sketch and scan it as a jpg. Send it to me as
  I have the bolt circle diameter on those six bolts that go in the
  rear counter weight and I can make an IGES you can send to the
  machine shop. Send me a picture of the rubber coupling your using as
  well. While you are at it buy Rhino. Once you get used to it you will
  wonder how you ever got along with out it :-)

  Paul Lamar


The tolerances appear so close between components in the photos that
there appears to be no place for the elastic media to go; the coupling
will essentially be in hydraulic-lock ... not be able to absorb any
energy.  Am I missing something?

Robin Berglund

The elastic media is the red stuff. We can drill holes in it
to make it softer if necessary.

Paul Lamar

McMaster Carr sells blocks of silicon rubber. It is good to 500 F.
I discovered that it can be band sawed and drilled into the desired shapes.

Paul Lamar

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