My 1929 Plymouth Model U

Chet's Old Plymouths

          Current Work

 The Frame Project

With the front suspension completed and all 4 wheels supporting the car again I continued on the framing project.  First I stripped out the old floor to get an idea of the daunting task ahead of me.  I am very disappointed by the lack of original wood.  I was hoping that something of the sill assembly was left but to my disappointment none to be found.

Using the three frame mounting points on each side of the car (6 all together) I was able to determine my understanding of what the sill plate might have looked like.  The picture below is a rough idea and the following are my determinations.  If anyone has information other then this, please let me know.

  1. Sill plate thickness 1 3/4".  Length, width, and exact shape to be determined.
  2. Sill will be a single piece structure from front to back.
  3. Rear section support brace is secured with Lap Joints and through bolted to the frame. 
  4. The rear body section sits on 4 defined frame points which will square the back section and everything from that point forward will be measured from the back section as the reference.

The Plymouth frame construction appears to be simpler in nature then the Fisher Body which relies more on mortise joints.  the Plymouth frame utilizes metal braces at high stress connection points.  Also mortis joints are used in many places.