1 min readInternal Balance for the Hybrid Wing Body ModelNASAApr 27, 2016 Image Article New 5.0-inch-diameter internal balance for the hybrid wing body model tested at NASA’s Langley Research Center’s 14- by 22-Foot facility. New 5.0-inch-diameter internal balance for the hybrid wing body model tested at NASA’s Langley Research Center’s 14- by 22-Foot facility.