Nearly twice the gigantic dimensions of the largest flying boat ever built, a 250,000-pound flying at is on the drawing boards at the Glenn L. Martin aircraft plant. Probably the precursor of the huge Clippers that will fly freight across the oceans in peace time, this projected monster is planned to carry 80 tons of bombs. Details of the giant are secret. Mr. Martin, disclosing only that it would be able to span the Atlantic at well over 300 miles an hour, added: “And that's only the beginning“.