For the reference configuration the limit value of 6 works out at about 61 (against an actual value of 46): the limit decreases to 48 for a 9-m torus, but that object would have B = 66! Obviously, there are a number of ways out of this alley: one could decrease the pressure on the rectenna membrane (by making it lighter of by slowing the rotation) or one could relax the quality requirement for said surface. But. one also should not lose sight of the fact that the theory behind the above discussion is quite simple and models only the global torus' behaviour. Investigation of the measures needed to ensure proper load introduction and avoidance of local effects is another area for future study. What is not possible is to increase the meridian radius to control B, since that parameter is given by the height of the stowage container. In conclusion, a 12.5-m rectenna seems a reasonable “largest” candidate for this mission, under the assumed volume availability on ASAP. Technological investigations to reduce the development risk of such a structure should in first priority be directed at:
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