2025

HT09 car on track in FSAE 2025

HT09 on the track at Formula SAE 2025



Engineering Summary

For the 2024/25 season, HyTech Racing continued to push engineering innovations with several major design changes to HT09. All engineering decisions were made with a strong vehicle dynamics justification behind them.

The most visually obvious change made to HT09 was switching from quad in-hub motors to quad in-wheel motors. By moving the motors and cooling jackets inside the wheel rims, the aerodynamics of the car drastically improved. Moving the motors inside the wheels required creative cooling methods.

Electrically, the car completely changed from its predecessor. Simplification and potential for iteration were the main goals when switching to only having two main circuit boards. The new electrical system can be built upon for autonomous racing.

Huge changes in technical regulations required a complete redesign of the rear section of the chassis. Repackaging the rear suspension and electrical systems while optimizing mass posed a challenging engineering problem that was solved with a variety of structural analyses.

HT09 also included our first full aerodynamic undertray and diffuser. Learning from HT08 testing, HT09 took advantage of low-hanging fruit to increase downforce without increasing drag.

Results

HT09 achieved our joint-best every finish (3rd) at FSAE-EV in Michigan. Finishing in the top 6 in every dynamic event is a testament to the performance of the car. Additionally, the team made design finalists (2nd overall) for the first time, largely thanks to the integration of all subsystems to the greater goals of the car.

HT09 Vehicle Details

Vehicle Mass
  • 414.91 lb / 188.2 kg (measured)
Vehicle Dimensions
  • Wheelbase: 1535 mm
  • Track Width: 1200 mm
Performance Envelope
  • Longitudinal: 1.74g (measured)
  • Lateral: 1.8g (measured)
Suspension
  • Quad-push rod double wishbone
  • Double push rods
Powertrain
  • 4x AMK A2370DD Motors, KW26-S5-FSE-4Q Inverter
  • 20,000 RPM, 21 Nm, 33 kW Peak
  • In Wheel Motors
  • 77 mph top speed (simulated)
Accumulator
  • 530 V, 6.3 kWh, 80 kW Peak
  • Custom LCO Pouch Cells
Aero Elements
  • Compound Curvature Carbon Fiber
  • 4.22 CI*A (simulated)
  • 1.42 Cd*A (simulated)
Sensor Suite
  • 30 Custom Analog Sensors, 7 SPI Signals, 28 Inverter Monitored Signals
  • Ethernet Capable
Battery Monitoring
  • Custom LTC 6811 BMS with 126 Cell Voltages, 72 Temperatures
Gearbox
  • 11.83:1 Reduction