Crimson Racing Wiki

Damper Spacers

Subteam: SuspensionSubsystem: DampersAssembly: Shock AssemblyCars: CR25, CR26I, CR26E

Purpose

Set the damper's position in its mounting.

Function

Positions the damper eye in the bellcrank and frame tabs so the load path stays in plane.

Design Process

No part-specific design process is documented. The Dampers subsystem design process applies: 1. Kinematics sets wheel rates; spring rate follows from wheel rate and motion ratio. 2. Dyno the available dampers and select matched units by axle. 3. Set bump stop height from the aerodynamic minimum ride height and the worst-case heave and roll. 4. Tune on track using damper position data from the bellcrank rotary hall-effect sensors. 5. Read the traces for asymmetry between bump and rebound travel time, which is the practical indicator of over- or under-damping.

Manufacturing Process

Turned on the CNC lathe, or milled where the geometry is not round.

Full Material List

Aluminium. 3D printed PETG spacers were compression tested on an MTS Exceed to generate stress-strain curves (0.6 mm nozzle, 230 C nozzle, 70 C bed, 20 C ambient).

Reoccuring issues

None recorded. This part has no entry in Knowledge_Transfer/Issue Logging/Fault Vault.xlsx, in either Issue Log.xlsx, in CR22/Issue Tracking/Shakedown 7-15-23.xlsx, or in any design review issue list found in CrimsonStorage or Box.

Still to document

Nothing in CrimsonStorage covers these yet.