They also explored designs involving spheroids, a primitive form of "implosion" suggested by Richard C. Tolman, and the possibility of autocatalytic methods, which would increase the efficiency of the bomb as it exploded.
De undersøgte også former, såsom kugler, en primitiv form for "implosion", som blev foreslået af Richard C. Tolman samt muligheden for autokatalytiske metoder, som ville forøge kraften af bomben under eksplosionen.