Jordan Rollover System Dynamic Rollover Testing (JRS)

2004 Volvo XC90 SUV Provides Outstanding Protection in Rollover Testing On July 24th, 2006 we tested this Volvo XC90 to determine how the roof would perform in a dynamic rollover event on the JRS. The results are outstanding and are available now. Please contact us if you're interested in obtaining this testing.
The measurements now collected from the JRS provide some of the world’s first, most comprehensive direct measurements of roof structure deformation and intrusion velocity. Both of these parameters are directly related to the risk of serious head and neck injury.

Test results:

            The results of the first Dynamic Rollover Test that was performed on the test vehicle are presented in this section. In the test, the vehicle dropped as planned and contacted the front near and far sides of the roof structure. 

Test 1 – 7/24/2006                 

Summary of Test Results

            The vertical load cells mounted on the roadway platform show the near and far side impacts.  The vehicle struck the roadway on the near side at approximately 1.80 seconds.  The entire roll sequence was completed by approximately 2.12 seconds.

            The string potentiometers located on the fixture support towers show the vertical vehicle motion throughout the test. The front of the vehicle dropped approximately 4.5 inches before contacting the roadway.  The rear of the vehicle dropped approximately 3.7 inches before contacting the roadway.  The vehicle was pitched at 5.2 degrees at contact.

            The roll encoder located on the cable pulley shows the roadway velocity throughout the test.  The roadway was traveling at 14.4 mph at contact. The roll encoder placed on the vehicle rotation shaft yields the vehicle roll angle during the test.  The roll angle of the vehicle was 140 degrees at the roadway impact. The vehicle roll rate was obtained from the roll angle roll encoder.  At initial contact, the vehicle roll rate was 194 degrees per second. 

Test results, Data Tables and selected comparison photographs for Test 2.

            The results of the second Dynamic Rollover Test that was performed on the test vehicle are presented in this section. In the test, the vehicle dropped as planned and contacted the front near and far sides of the roof structure.

Test 2 – 7/24/2006                 

Summary of Test Results

            The vertical load cells mounted on the roadway platform show the near and far side impacts. The vehicle struck the roadway on the near side at approximately 1.75 seconds.  The entire roll sequence was completed by approximately 2.04 seconds.

            The string potentiometers located on the fixture support towers show the vertical vehicle motion throughout the test. The front of the vehicle dropped approximately 4.8 inches before contacting the roadway.  The rear of the vehicle dropped approximately 3.9 inches before contacting the roadway.  The vehicle was pitched at 5.3 degrees at contact.

            The roll encoder located on the cable pulley shows the roadway velocity throughout the test.  The roadway was traveling at 14.6 mph at contact.  The roll encoder placed on the vehicle rotation shaft yields the vehicle roll angle during the test.  The roll angle of the vehicle was 150 degrees at the roadway impact. The vehicle roll rate was obtained from the roll angle roll encoder.  At initial contact, the vehicle roll rate was 199 degrees per second.