The inquest was told Flt Lt Corser had gone with a friend to the slopes of Elidir Fawr near Llanberis early that morning.
Both were intending to carry out a form of paragliding known as “speed flying”, which involves higher speeds of up to 70 km/h (43 mph) and flying much closer to the ground.
His colleague launched first and successfully completed a four-minute flight.
However, Flt Lt Corser decided to launch from another part of the mountain and set off alone, the inquest heard.
He was seen soon afterwards by two climbers, flying over a disused quarry before heading out of sight through a V-shaped gap in the rock.
One of the climbers, Paul Hockin, said in a statement: “The paraglider was travelling quickly, swaying from side to side, and didn’t seem to be fully under control.”
An investigation by the British Hang Gliding and Paragliding Association said it was difficult to determine how Flt Lt Corser lost control of his paraglider.
However, although he was experienced and familiar with the flight path, the report noted that any mistake in the confined area of the quarry would have been impossible to recover from.