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Michael L Olinger MD, FACEP Medical Director, IEMS Medical Director, IZOD Indy Car
Michael L Olinger MD, FACEP Medical Director, IEMS Medical Director, IZOD Indy Car
+y
+X
Acceleration Palindrome Acceleration = Rate of Change of Velocity over time
Accelerations are measured in gravities or g’s
1g = 9.80665 m/s/s = m/s2
To cause an object to accelerate requires a Force to be exerted on that object
F = ma
MTRSPORT INJ. 4
X
Y
Z -127g
8 130
50 mSec
BB Indy 1996
Ear Piece Accelerometers
ACCELEROMETER ARRAY
Y
Z
X
UNCOUPLING OF HEAD AND CAR IN REAR IMPACT CRASHES
• Head Acceleration = 2-2.5 X Car Acceleration
Conclusions
Engineering and design have significantly decreased car accelerations in crashes
To achieve maximal protection, drivers/occupants must be coupled to the car.
