Three rolled half pipes were made each with different diameter of perforation but experiment were only done on two with perforation diameter of 1 mm and 0.5 mm due to tight time schedule.
Þrjár mismunandi gerðir gataplata voru smíðaðar en aðeins vannst tími til að gera tilraunir með tvær þeirra, 0,5 mm og 1,0 mm gatastærð.