In 1933 he founded the U.S. Institute of Aeronautical Sciences continuing his research on fluid mechanics, turbulence theory and supersonic flight. He studied applications of mathematics to engineering, aircraft structures and soil erosion.
Sa 1933 niya itinatag ang US Institute of Sciences Aeronautical magpatuloy sa kanyang pananaliksik sa mga likido mechanics, ligalig teorya at supersonic flight. He-aral ng mga aplikasyon ng matematika sa engineering, sasakyang panghimpapawid estraktura at lupa agnas.