Alternate reality drive

The drive was developed by Rodney Mckay from a parallel universe.

Overview
The drive was designed to transport matter through the Inter-universal bridge to access parallel universes.

History
The technology was encountered when an alternate Daedalus appeared over Atlantis when its drive forced it to the normal universe. Shepherd's team became trapped on the alternate universe's Daedalus when the drive malfunctioned because of it's flawed design. The team became lost while jumping through alternate universes. McKay was able to modify the drive to reverse and go back to all the universes they previously visited. They were able to get home and abandon the ship before it jumped again. McKay theorized that the ship only had about half a dozen more jumps before the drive burned out. The normal universes McKay stated that he would be able to build his own version of the drive easily without any of the encountered flaws.