This papercraft is the Tornado 2's transformation, based on the video game Sonic Adventure 2, the paper model was created by Corbak. The Tornado is a red two-seated, vintage-style biplane in the Sonic the Hedgehog series. It made its first appearance in Sonic the Hedgehog 2 and has since featured in many other Sonic games. The Tornado is usually piloted by Tails, while Sonic or other characters walk on its wings. The plane is owned by Sonic himself, and, as such, he has also been seen to be the pilot at times. Often, it is shown towards the end of each game where it usually arrives just in time to save a character from falling to his or her death. It has since become a staple icon of the series.
In Sonic Adventure the Tornado was again made playable in a retread of the classic Sky Chase Zone, now in two acts instead of one. At the end of act 1, the plane was finally shot down by the laser cannon of Dr. Eggman's Egg Carrier.
When Tails regained consciousness he went back to his workshop to finish the construction of his new blue-tinted experimental biplane, the Tornado 2. Unlike the original Tornado, it required a Chaos Emerald to work normally. It was placed in the front of the craft with two engines to hold the power. After finding an Emerald and finishing the plane, Tails and Sonic went to chase the Egg Carrier yet again. This time they were more successful, as the Tornado 2 was capable of folding its wings into an X-shape to reach extreme speeds. After crash-landing on the Egg Carrier due to a lack of landing gear, it was found by Big the Cat and flown to Mystic Ruins, where it crash-landed again. After this, Chaos found it and stole the Chaos Emerald from it, largely wrecking the already damaged plane. Sometimes it could be orange
In Sonic Heroes, Tails is flying the Tornado 2, with Knuckles in the back seat. The Tornado 2 is in its X-shape used to catch up to Sonic and give him an important message from Eggman. After Sonic throws away the message, Tails and Knuckles jump out of the Tornado 2 and follow Sonic on foot, with the Tornado 2 flying off-screen, possibly on autopilot. Due to the lack of a Chaos Emerald on the Tornado 2, it can be assumed that it no longer requires an Emerald to work correctly.
In Sonic Riders, the Tornado 2 is seen towards the end of the Hero Story, when Eggman steals the Babylon control box and flies to the Babylon Garden. Tails flies the Tornado over to the island, while Jet the Hawk controls the large Babylon Airship. Knuckles is sitting in the second seat, and Sonic is standing on the wings. Sonic heads down to catch Eggman, but Tails hands him a new gear first. The plane isn't seen again, though it can be assumed that Tails landed it on the Babylon Garden.
In Sonic Advance 3, the player rides atop the Tornado 2 in the special stages, maneuvering up, down, left and right to collect the required number of rings. The plane can also temporarily transform into its X-winged configuration by flying through blue portals, increasing the plane's speed, increasing the value of each collected ring times two, and leaving the player's character comically holding onto the plane for dear life. Failure to collect enough rings at either the halfway mark or at the end results in the Tornado throwing the players' character off and spinning off the screen out of control.
You can download this paper craft model here: Sonic Adventure - Tornado 2's Transformation Free Aircraft Paper Model Download