Chassis Development Critical Path MS16

This page dictates the critical requirements for a chassis design MVP (minimum viable product)

• updated February 4th 2025

Currently, the V1 chassis is divided into 4 sections

1. FSU + Foot compartment (yellow)

2. Occupant Cell (magenta)

3. Battery Integration (teal)

4. RSU + Aero-tail integration (green)

Open

The checklist that follows will outline which section of chassis development is responsible for such criteria

Vehicle Collision Cases

Per Appendix F of FSGP/ASC regs, the vehicle has to pass multiple collision cases, including:

• at least 5 cases of front/rear/side collisions

• 5 cases of rollcage impact

Assume vehicle weight of 300kg for force applied (subject to change depending on final vehicle mass), so each 5g of the vehicle’s mass is ~15000N of force (300kg * 5 * 9.8m/s)

Chassis collision cases

When simulated to the collision cases, the occupant cell of the chassis cannot deform for more than 25mm and cannot pass ultimate tensile strength (UTS)

Rollcage Collision Cases

When simulated to the required loading cases, the rollcage cannot yield (cannot pass yield strength)

Contact patches will have to be placed for front, rear, top and side of the rollcage, and relevant loading cases can be applied to each patch

Rollcage loading patches for MS15

Open

Rollcage collision cases (Sec 2)

Interiors Integration

Mounting points for various interiors components, some of which has to be validated to keep driver safe

Requires FEA/Calc

Doesn’t require FEA/calc

Dynamics Integration

Dynamics systems will have to be allocated mounting points and clearances for their parts, and simulations to ensure chassis does not fail under loading from dynamic components

FSU (front suspension unit) (Section 1)

Steering (Section 1)

Pedal (Brakes and Accelerator) (Section 1)

RSU (Section 4)

Battery Integration (Sec 3)

Battery Mounts to behind the occupant cell, couple of things to keep in mind:

Aerobody Integration

aero-chassis body integration

Nose Integration (Sec 1)

Side Integration (Sec 2 & 3)

Tail Integration (Sec 4)

There is a long “tail” from the end of chassis to the end of aerobody, some emphasis for support will be needed to support the tail to prevent it from drooping

Aerobody Interference check

There are a couple main points where aero might interfere with chassis, double check whether iterations are interfering

Misc

Couple of things to keep in mind in chassis design: