			Tethered Mars Lander with WaterTank counterweight
			Tethered Mars Lander with WaterTank counterweight
			Radius at "top" of lander			100	feet
			Radius at "bottom" of lander			132	feet
			Tether length (shown)			200	feet
			Rotational Speed			3	rpm
			The WaterTank is used because its potentially useful but not critical. If the counterweight is mission critical, a tether problem becomes a showstopper. Historical Precedent for Tethered Systems




			Alternatively, a dual mission could be launched, each vehicle capable of operating independently.

			Centrifugal force F=(0.0011)W^2R.3048
			where F is force in earth gravities			(.38 is Mars Normal)
			W is spin rate in revolutions per minute
			R is spin arm length in feet				W=3	Difference	5' & 6' crew
			F	W	R	F	R	to head	to toe
			0.04	1	108	0.308	102	1.000	0.944
			0.14	2	108	0.311	103	1.010	0.954
			0.33	3	108	0.326	108	1.059	1.000
			0.04	1	116	0.332	110	1.000	0.948
			0.16	2	116	0.335	111	1.009	0.957
			0.35	3	116	0.350	116	1.055	1.000
			0.04	1	124	0.356	118	1.000	0.952
			0.17	2	124	0.359	119	1.008	0.960
			0.37	3	124	0.374	124	1.051	1.000
			0.04	1	132	0.380	126	1.000	0.940
			0.18	2	132	0.383	127	1.008	0.948
			0.40	3	132	0.404	134	1.063	1.000