Jet packs were a type of back mounted thruster system that allowed an Autobot extended level of flight. It was worn easily around the back and was mass-produced so many Autobots could journey to locations their ground based forms would not allow them access to.

Considering that most Autobots,in general cannot fly like the Decepticons, this must be their way of nullifying that advantage.


The Transformers cartoon

Optimus Prime borrows a jet pack from Side Swipe to chase the Decepticon space cruiser before it left earth's atmosphere. More Than Meets the Eye, Part 3 Why it wasn't a super cool permanent part of Optimus remains a mystery.

Bumblebee wore his pack while he worked with Powerglide as they explored strange energy readings which turned out to be an island in the middle of the ocean. Bumbleebee would be attacked by a dinosaur which damaged his jet pack which Powerglide attempted to repair when they were suddenly attacked by another larger dinosaur. Powerglide abandoned the jet pack, transformed and took Bumblebee back to Autobot base as the dinosaur stepped on the jet pack; destroying it in the process. Dinobot Island, Part 1

After the energy tapping of Dinobot Island caused instability all across Earth, Optimus and the Autobots used a series of jet packs to fly to the island. Dinobot Island, Part 2

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