"That is in zero wind," he said.
"It would have been up around 300kmh if there had have been wind."
The lack of wind also contributed to the flight distance and time in freefall, he said.
Despite not quite achieving his goals, Mr Aitchison said yesterday afternoon he was "stoked".
"Even my Dad came down to watch it - he ended up coming up in the plane with me."
In the past month Mr Aitchison had dropped about 8kg in weight to aid his record attempts, doing regular gym workouts to build arm strength and sticking to a "no carbs, no sugar" diet.
While celebrating with a few beers last night, he planned to head straight back to the gym next week to begin preparations to break his records, aiming to complete a wingsuit jump from 30,000 feet next year.