1983 ex-Dublin Bus KC citybus (video 3) - Cummins L10 / Voith D851

A short video of my 1983 ex-CIE/Dublin Bus "KC"-type GAC citybus driving down the Old Airport Road towards Santry, Co. Dublin on 24/4/2009... the massive blast of air heard half way through the video is caused by the unloader valve which vents the air system when it hits 9 bars (prevents air system from over-pressurisation)... the blast of air was a real unique part of the KC & KD type buses in addition to their quirky and uniquely Irish charachter