Back Seat & Baggage Area
These photos show the rear seat back. I took these to show the bracing
used and how placed. There is a 3 inch wide extension added to the top of
the original panel to extend the back up. I then added the extension for
the head rests. (It was done this way because I didn't have a prepreg piece
wide enough to get the required width with one piece.) These were glassed
over on the front and back side with two ply bids strips. A two inch wide
plywood hard point was added to the bottom with one inch extending beyond
the prepreg and one inch bonded between the sides of the prepreg. This was
then glassed into place with a 2 ply bid. This hard point served to raise
the whole panel for a better fit against the flanges and provide for a full
width piano hinge for mounting.
The bracing shown is balsa wood with the edges rounded and covered with a two ply bid. The result is a seat back that is strong and ridged both vertically and horizontally. It might be a bit of overkill but the only thing I would change if I did it over would be to remove the center horizontal brace as I don't think it is needed. (Note the photo was taken before I had glassed the horizontal bracing.)
The completed seat back shown in place.