← Back to portfolio

SAEINDIA · Vehicle systems · Mechanical calculations

Tractor Design Competition 2019

Trac Toro Racing design evidence for SAEINDIA Tractor Design Competition 2019, using hand calculations and design-review documentation across chassis, braking, steering, engine/transmission and QFD-style design priorities.

Mechanical design project visual

Evidence dashboard

Vehicle design broken into subsystem checks.

Frame sizing

The design report uses AISI 1018 mild steel rectangular sections and a bending-stress check to size the chassis for the assumed vehicle mass and packaging envelope. The report explicitly notes that CAE would be needed for more accurate follow-up validation.

80x40x4primary tube 91.5 MPastress 4safety factor

Subsystem evidence

The tractor design report is useful as early evidence of vehicle-system reasoning. It is not a current target-role headline, but it shows the habit of decomposing a mechanical design into physical checks rather than treating CAD as the entire engineering task.

  • Chassis bending moment documented as 1,482,250 Nmm with section modulus 16,200 mm3.
  • Primary and secondary frame members documented as 80x40x4 mm and 40x40x4 mm rectangular sections.
  • Braking model documented 0.15 m brake radius, 10 m stopping distance, 2.411262 m/s2 deceleration, 100.45 kgm braking torque and brake factor 2.4.
  • Steering model documented 1320 mm track width, 1800 mm wheelbase, 19.99 degree steering-arm angle, 28.63 degree delta and 196.5 mm steering-arm length.
  • Transmission model linked 820 mm rear wheel diameter, 25 km/h top speed, 163 rpm wheel speed, 16.56 overall reduction ratio and 15.48 first-gear ratio.
  • QFD evidence lists design drivers such as average weight, 25 km/h maximum speed, ballast, frame, hitch, radiator cooling and fuel efficiency.

Limitations

This page is intentionally concise: the attached evidence is a design-review calculation package, not a validated prototype test campaign. The report itself states that more accurate chassis conclusions would require CAE. Its value is context: it connects undergraduate mechanical foundations to later energy-system modelling, CFD and test-rig work.