Here are a few pictures of my dual SPAL fans. The fans are mounted on an FMS 2 core
aluminum radiator, using homemade brackets manufactured from 3/4" x 3/16" thick bar
stock.
All the images below are thumbnails. Clicking on them will bring up the bigger images.
Here is a picture of the whole works.
The fans are 4.25" thick at the motors and 2.75" thick inbetween the
motors. The space inbetween is approx 6" wide.