Operator	strokes	velocity			volume	pressure
		km/hr			litre/minute	ounce/inch2	psi	inches H20	mm mercury
		low	high	average
Richard	76	38.5	41.5	40	327	1	0.06	1.7	3.2
	86	37	41	40	327	1.5	0.09	2.6	8.4
Mark	86	36	40	38	310	1.5	0.09	2.6	8.4
	90	47	52	47	384	3	0.19	5.2	16.8
Darrell	86	41	43	43	351	1.25	0.23	2.2	7.0
	86	39	42	41	335	1.5	0.09	2.6	8.4
Neil	86	43	45	44	359	1.75	0.11	3.0	9.8
	84	46	48	48	392	1.5	0.09	2.6	8.4
averages	85	41	44	43	348	1.6	0.12	2.8	8.8
area	27 dia	572 cm2
ideal volume	at 1.2	686
	at 1.5	858