FSX/FSX Acceleration Bristol Bulldog IIA. The Bristol Bulldog was a single seat biplane fighter of the inter-war period and one of the most famous aircraft used by the RAF during that time. The Bulldog Mk II entered service with the Royal Air Force in May 1929, replacing the Gloster Gamecock and Armstrong Whitworth Siskin fighters then in frontline use. It is remembered for spectacular aerial formation displays at the annual Hendon RAF competition. The Bulldog's superb maneuverability and ease of handling made it very popular with its pilots. The Spanish used the Bulldog at the outset of the Spanish Civil War on the Republican side. This is AlphaSim freeware Bristol Bulldog, no 2D panel but working VC. Upgrade to FSX-FSX Acceleration by A.F.Scrub