In order to compare the efficiency of different types of bands it is
necessary to record both the pull required and the velocity of the
projectile. The following tests were conducted with a 30 inch pull
distance. These tests are meant only as a general guide; results will
vary depending on the size of the loop, length of band set, and pull
distance.

A metal slingshot with tube bands purchased from Wal-Mart:
Pull force = 17.2 lbs (pounds)
3/8 inch steel BB  = 141 f/s (feet per second)

Pseudo-tapered tubes on the Flat Cat
1/4 inch outside dia. 5/32 inch inside dia.
Pull force = 15 lbs
1/4 inch steel ball - 215 f/s
3/8 inch steel ball - 185 f/s

Pseudo-tapered flat bands on the Flat Cat
50 thousandths thick, ½ inch wide
Pull -  13 lbs
1/4 inch steel ball - 190 f/s
3/8 inch steel ball - 176 f/s

Pseudo-tapered flat thera bands on the Flat Cat
30 thousandths thick, 3/4 inch wide
Pull - 13.5 lbs
1/4 inch steel ball - 214 f/s
3/8 inch steel ball - 185 f/s

Pseudo-tapered 107 office rubber bands on the Flat Cat
Pull - 16 lbs
1/4 inch steel ball - 197 f/s
3/8 inch steel ball - 178 f/s
TEST RESULTS OF
PSEUDO-TAPERED BANDS
EFFICIENCY