Adam gets a chance to test out a real to life flying backpack system produced by a civilian company called GRAVITY..
Later Adam contacted the Colorado School of Mines (Golden, CO) to have them build a titanium/polyurethane "Iron Man" suit. They used the original designs from the Movie and converted them to 3D printer compatible files, and the 3D Lab at the CSoM build it
Here is a short 10 minute movie showing the experiences -
Source: https://www.youtube.com/watch?v=U1wEO-pHizQ
1000 horsepower it appears is what is needed for reliable human flight without wings..