The power plant in the Dreamliner is somewhat unique. It allows for a change of engine displacement class in matter of minutes. With only one scheduled record attempt every second year, this is a way to increase the possible number of records each time.
The idea is to use two engines, one base engine and one supplementary engine which will push the total engine displacement into the next class. The car is runs on either the base engine only or the two engines simutaneously.
So far a liquid cooled two stroke 353 cc has been used as the base engine. No major modifications has been made to the engines as this may have affected reliability. To cut aerodynamic drag, the radiator has been replaced by an ice tank.
The second engine is the Swedish two stroke, air cooled 85 cc Radne Raket Go-Kart engine. The Radne Raket, having one gear only, feathures a centrifugal clutch. While the car is tharted on the base engine, the Radne Raket ris running at idle cith the cetrifugal clutch unengaged. Once the car has built up a little speed the throttle is opened on the Radne Raket and the clutch engages. Both engines are then delivering power to the rear wheels.
Both engines drive a common secondary axle which in turn drives the rear axle. All power transmission is done by Regina chains.
The Dreamliner III was driven twin engined as the records were set in Falkenberg 1996.
To indicate what engine displacement is used, the Dreamliner is designated a number corresponding to the FIA displacement class. Consequently, the Dreamliner III runs in class 3, 350-500 cc.