Yes, it does back flips. It is a Eurocopter BO-105 CBS 4 Twin engine helicopter. Stock model with a Rigid Rotor system, the fixed rotor is why it can do aerobatics.
redbull.com wrote:
What makes Red Bull’s BO-105 CBS different from any of the others are the man inside—Charles "Chuck" P. Aaron, the only pilot licensed in the United States by the Federal Aviation Administration to perform aerobatics in a helicopter, and its classifications as an experimental aircraft. The experimental category enables the pilot to push the envelope of an aircraft’s own flight capabilities.
"Originally, it scared me to death!" Aaron says with a huge smile. "I’d seen airplanes do loops and rolls and back flips, but not helicopters!" After a couple of years of experimentation, often with Eurocopter’s factory test pilot instructor, Rainer Wilke in the seat beside him, Aaron found ways to tease aerobatics out of the BO-105 CBS that were previously unimagined.
What makes Red Bull’s BO-105 CBS different from any of the others are the man inside—Charles "Chuck" P. Aaron, the only pilot licensed in the United States by the Federal Aviation Administration to perform aerobatics in a helicopter, and its classifications as an experimental aircraft. The experimental category enables the pilot to push the envelope of an aircraft’s own flight capabilities.
"Originally, it scared me to death!" Aaron says with a huge smile. "I’d seen airplanes do loops and rolls and back flips, but not helicopters!" After a couple of years of experimentation, often with Eurocopter’s factory test pilot instructor, Rainer Wilke in the seat beside him, Aaron found ways to tease aerobatics out of the BO-105 CBS that were previously unimagined.