General information
- Engine power: 68kW (91HP)
- Torque: 64Nm
- Wet weight: 248 kg
- Fairing: Carbon-kevlar composite
- Chassis: 25CrMo4 + Al 7075-T6 33kg
POWERTRAIN
The FRT03 bolide is powered by a four-stroke, four-cylinder Otto engine from a CB600F motorcycle, whose intake and exhaust systems are optimized by CFD analyses. The lightweight fuel system is made of composite materials with a submersible pump and a 3D-printed intake duct with a 20 mm restrictor. The exhaust system is a 4-1 stainless steel configuration with electronic throttle control. Power transmission is achieved by aluminum sprockets and a Drexler differential with variable gear ratios depending on the track.
SUSPENSION
The suspension geometry of the FRT03 is optimized using kinematic response computer simulations to maximize the contact patch of the tires with the ground and negate the negative effect of tire bending in turns. The suspension design takes into account the influence of forces, damper damping, tire characteristics, spring stiffness, and mass transfer to achieve maximum friction force. Mechanical suspension components are designed with a focus on adjustability, low mass, and high stiffness, using lightweight materials and variable parts. The suspension is a double-wishbone type with internal springs connected via rocker arms, and performance is validated and optimized by analyzing data collected during driving.
CHASSIS
The load-bearing structure of the FRT03 bolide combines a 25CrMo4 chromoly steel space frame for rigidity with an Al 7075-T6 aluminum carrier for ease of assembly and access to components. The chassis is designed in parallel with other systems with the aim of maximizing stiffness with minimal mass. Driver safety is ensured by a carbon-kevlar fiber composite seat, a 6-point harness, and an aluminum panel that protects against engine heat. Ergonomics are improved with adjustable cushions and an adjustable pedal system for drivers of various builds.
AERODYNAMICS
The aerodynamic devices on the FRT03 (front and rear wings, underbody, and cooling channels) were designed using CFD simulations to optimize downforce and reduce air resistance. The wings use pressure differences and endplates for efficiency, while the underbody generates downforce using the Venturi effect. The simulation of the entire system ensures aerodynamic balance and airflow for engine cooling. The wings are made of carbon fiber, and the simulation results are validated by wind tunnel testing.
