Dataset:  roll_res.dat

Source: G.S. Tiwari and K.P. Pandey (2008). "Performance Prediction of
Animal Drawn Vehicle Tires in Sand," Journal of Terramechanics, Vol. 45,
pp. 193-200.

Description: Effects of various numeric factors on rolling resistance (kN)
of camel carts in sand. Factors: 
Tire width/diameter ratio
Cart Load (kN)
Tire inflation pressure (kPa)
Sand Compaction (MPa/m)

Variables/Columns
Cart Load (kN)  7-8
Tire Inflation Pressure   14-16
Tire width/diameter ratio  18-24
Sand compaction    28-32
Rolling Resistance   34-40