Description To capture the American market, the 6T Thunderbird used a variant of the earlier Speed Twin's parallel twin engine, bored out from 500 cc to 650 cc to give the added horsepower American customers demanded. The concept of enlarging the Speed Twin, the Thunderbird name and its 'paper dart' logo were thought up by managing director Edward Turner on one of his regular trips to Triumph's operations in the USA. The 'paper dart' logo was embossed onto the chain case cover on Thunderbirds from 1955 to 1962.
Mark Rogan, London Member Since October 2013 Artist Statement I've been a professional photographer for many years and am very fortunate to be able to photograph some stunning classic motorcycles and cars.
I am continually adding new artworks so please stop by again. Please enjoy my work!