Weed speed m/s	Single fan drum effective range (m)		Parallel double fan drums effective range (m)		Double fan drums coplanar effective range (m)
Weed speed m/s	More than 0.15 m/s	More than 0.25 m/s	More than 0.15 m/s	More than 0.25 m/s	More than 0.15 m/s	More than 0.25 m/s
4	18.1	12.4	19.3	19.16	17.7	13.54
6	23.5	14.4	22.96	19.21	27.24	17.11
8	25.9	19.3	29.2	20.31	33.2	20.79
10	27.9	20.7	35.15	24.57	34.24	27.26
12	30	26.5	39.25	29.09	42.9	33
14	32	28.6	42.14	35.01	43.76	34.01
16	31.9	28	43.7	38.34	44.37	34.19
18	35.1	29.7	45.24	39.4	45.14	37.67
20	35.4	28.3	47.67	41	47.46	43.05
30	36.1	33.4	49.87	43.65	55.2	47.15
40	36.4	35.4	49.6	43.04	59.34	48.64