N4961D was a Kubicek BB85Z balloon, 302,600 cu./ft., 87 ft. diameter, 6317 lbs. max gross weight. Depending upon the basket model, maximum passengers can be from 18 to 26. There is a larger model that is FAA approved for 34 passengers.
Is the FAA approval contingent on the spec for the lifting device or can that be changed as one desires?