It's all eyes on the skies in County Wicklow today.
Highlights include the Norwegian Air Force Historical Squadron and the Black Knights Defence Forces Parachute Team.
For the first time this year's event will be streamed live on Aertv.
Gerry Humphries is full-time farmer in Limerick and a former RAF pilot.
He's flying his homemade plane today, nick named 'the flying cow' - as it's painted to look like a Friesian cow.
But he says his plane isn't just for display:
