[11] 1937 saw Trapnell be selected for the first time as a member of the Ireland national badminton team as a substitute in a match against Wales.

[13] According to Frank Peard, it was Trapnell who identified the potential of a young James 'Chick' Doyle in the Gas Company Club.

[14] Trapnell continued to play badminton at Midland branch tournaments into the late 1940s.

[18] In 1959 Trapnell was elected honorary secretary of the Badminton Union of Ireland, a position which he retained until 1974.

He was elected president of the organisation in 1974, stepping down in 1976 having completed forty five years service to Irish badminton.