Mr A.C.T. Isaac, of London, later of Hillmorton, near Rugby, Warwickshire, in the UK, built a two-seat primary gliders. The first, in 1923 had trials off Parliament Hill,in North London, resulted in the gliders either breaking up and injuring the pilot, or in requests from the police to ‘take them away’.
A two seat primary type with 9.29 sq.m / 100 sq.ft wing area with a slotted section.
It was left overnight in dead-calm conditions. The following morning it was not to be seen, and was presumed stolen.
A second machine was built in 1929 to Zogling-like specification but this too was a failure. The flexible structure was abandoned as impracticable. The empty was 45.35 kg / 100 lb.
A biplane glider of 7.32m / 24 ft 0 in span was later built and test flown at Chingford, London.
All Aero 