 This design was followed by a pulsed system demonstrated in May 1935 by Rudolf Kühnhold and the firm in Germany and then another in June 1935 by an Air Ministry team led by Robert Watson-Watt in Great Britain.In 1935, Watson-Watt was asked to judge recent reports of a German radio-based death ray and turned the request over to Wilkins.Wilkins returned a set of calculations demonstrating the system was basically impossible.