After looking at a large collection of images, I think I'm close to having a height for the replica seat.
Some pictures show top of the seat backs (w/o headrest) level with the rear bulkhead, while others show it sitting above!
This appears to be the reason why.
Attachment:
Pan,noPan.jpg
Some models have a dropped floor (green Cat) that results in the seat back level with the bulkhead.
The seat pan is about 2" below frame bottom.
Attachment:
Pan,Pan.jpg
If a rail assembly adds 1" the seat height should be in the neighborhood of 1" taller than the distance from the bottom of the frame to the top at the rear bulkhead.
This SketchUp drawing is of the smaller ,current Caterham fame,
Attachment:
SmCatFrameHeight.jpg
Using that measurement, and approx. values taken from the frame on the tiles pic This sketch was assembled.
Attachment:
SeatHeights01.jpg
Then, because The STRanger 7 height was increased to match the skuttle height needed for the Cologne V6, 1 3/8" was added.
The first dimensioned SketchUp drawing will be of 14" wide, 21 5/8" tall replica/copy. The drawing for mine will be 16" wide and 23" tall.
Not altogether unlike the difference between the Cat Roadsport ,and the Roadsport SV size.
Attachment:
Roadsport,RSSV.jpg
All for now,
Ron
181.2