The Airbus will fly a fully automatic go-around provided at least one of the autopilots is engaged. A go-around is initiated by advancing the thrust levers to the TOGA position (fully forward) - this then causes the autothrust to apply TOGA thrust, the aircraft will pitch up and maintain the previous approach speed (V
APP ), and will initially follow the track that it was on at the time of go-around initiation.
All you have to do now is raise the landing gear (once you have a positive climb rate).
So now, you are climbing away in a straight line. If the FMGC has been correctly programmed with the go-around track, you can then engage the NAV mode so that the aircraft will follow this go-around track.
At the appropriate height (as programmed in the FMGC - usually 1500' AAL), the aircraft will lower the nose, causing it to accelerate - this then allows you to retract the flaps on schedule. It will accelerate towards its minimum "clean" speed i.e. the slowest speed it can fly without the use of flaps. It will then pitch up again to maintain this speed in the climb.
The go-around altitude "should"
have been set during the final approach - if so, the aircraft will level off at this altitude.
So basically, on the Airbus at least, provided everything is correctly programmed in the FMGC, the aircraft will fly a very nice go-around for you - all you have to do is retract the gear & flaps at the approriate points!!
Hope some of this was of use!