Crimson Racing Wiki

Air Lines

Subteam: PowertrainSubsystem: ShiftingAssembly: Shifting AssemblyCars: CR25, CR26I

Purpose

Carry regulated CO2 from the solenoids to the actuators.

Function

Nylon pneumatic line routed away from heat sources.

Design Process

No part-specific design process is documented. The Shifting subsystem design process applies: 1. Route every line and fitting in SolidWorks. Lines cannot be within 1 in of the engine casing or 3 in of the exhaust; bend radius is 4 in. 2. Size the cylinder bore and line inner diameter with full calculations rather than by picking a catalogue part. 3. Fit the linear potentiometer and set the position bounds that define a completed shift. 4. Tune the preload duration and the torque reduction window on track. 5. Measure the result. CR26I averaged 65 ms cut time across endurance closed loop against 85 ms open loop; across 180 upshifts that is 9 seconds under power cut instead of 15.3 seconds.

Design Constraints

All lines and fittings must be routed in SolidWorks. Lines cannot be within 1 in of the engine casing or 3 in of the exhaust. Bend radius of the shifting lines is 4 in.

Manufacturing Process

Cut to the modelled length and crimped.

Full Material List

Nylon pneumatic tubing.

Reoccuring issues

Lines bursting. This stopped once the CO2 tank was mounted in the allowed orientation.

Still to document

Nothing in CrimsonStorage covers these yet.