The IZOD IndyCar® Series Suspension Wheel/Wing Energy Management System

FACT SHEET: Suspension Wheel/Wing Energy Management System (SWEMS)

Suspension Wheel/Wing Energy Management System (SWEMS) restraints are attached at multiple points of each IZOD IndyCar Series and Firestone Indy Lights chassis and suspension to minimize the possibility of wheel assemblies and wings becoming detached during high-speed accidents.

FACT:
The Indy Racing League introduced the requirement of Suspension Wheel/Wing Energy Management System in 1999.

The Indy Racing League was the first racing series in the United States to require the use of SWEMS.

The Indy Racing League pioneered the use of SWEMS on its cars’ rear wing assemblies. The original SWEMS systems were only used on wheels.

FACT:
All IZOD IndyCar Series and Firestone Indy Lights cars are required to be fitted with SWEMS:

The rear wing and all four wheels are firmly attached to the car’s suspension and chassis with restraints.

These restraints are made of high-tensile FIA-approved Zylon material with a break load of 100 kilonewtons, which equals 22,480 pound-force.

The front and rear suspension restraints must consist of a minimum of three SWEMS per corner.

The rear wing must consist of one or two SWEMS (based on break load) attached from the mainplane to a secure primary location on the transmission.

FACT:
Visual inspection of the restraints is part of the initial safety inspection of call cars during an event weekend.

FACT:
If any of the four corners of the race car sustain impact, the rulebook mandates changing the SWEMS on the affected corner.

FACT:
A member of the Holmatro Safety Team scans for debris and/or injuries as part of its response to every accident.

More Information regarding the IZOD IndyCar® Series can be found at: www.indycar.com

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