During World War II he designed and made the first X-band microwave radar with 100 ns pulse and a one degree beam which directed the 15" guns at Dover. It showed shells splashing around the target. He invented clutter reference Doppler radar which could see vehicles on land and was used in Italy. As a senior lecturer in Auckland University he was a NZ delegate to the 1955 UN conference in Geneva on "Peaceful Uses of Atomic Energy". During a year at Harwell in 1955 he measured the neutron yield from plutonium fission as a function of the incident neutron epithermal energy.