.

A 1/13th scale model of a  Stevenson   Weekender Tallulah is a "metric inch" model of the "Weekender" built from the actual full size plans purchased from Stevenson Projects I decided to make a study model of the Weekender before building the full sized boat.  The study model quickly evolved into a remote control pond yacht, which is what you see here.  Metric Inch Scale Tallulah was built to a funky "metric-inch" scale using the 50:1 side of a three-sided metric architectural rule and reading the decimeter markings as if they were inches.  The resulting model is about 1/13th scale, which works out to be almost 18 inches in length for the 19 ft long Weekender.   19ft * 12in/ft * 1in/2.54cm * 10/1 (dm as in) * 1/50scale = 17.95in ( 17.95in / 19ft ) / 12in/ft = 1/12.7scale  ~ 1/13th Why the funky scale?  The dimensions on the Weekender plans are given in inches and fractions of inches, not the feet, inches, and fractions ...