Division 3.2.10 Restraint blockage ratio
The restraint system mounting shall not be in front of the vehicle. The relative blockage ratio of the vehicle frontal area due to the restraint system, εrestr, shall not exceed 0,10.
where:
εrestr Arestr Af
is the relative blockage ratio of the restraint system;
is the frontal area of the restraint system projected on the nozzle face, m2;
is the frontal area of the vehicle, m2.