Safety aspects are, unfortunately, all too often set aside when transporting wheelchair occupants in motor vehicles. It can, for example, be a matter of the anchoring of the wheelchair not being to an approved safety standard or that the 3-point seat belt for the wheelchair location is not being used. This could have disastrous consequences! The reason is often a lack of knowledge and awareness of what happens in a collision. Many have no idea of how strong the forces involved really are.
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What is a collision?
A course of events.
Forward/backward directed power.
Accelerated/retarded kinetic energy.
Absorption of kinetic energy.
A passage of time of 0.2 sec.
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Person travelling in a car seat
ESTIMATE OF FORCES INVOLVED
Weight of person 80 kg
Force 20 G
Speed 50 kph
Effect 80 x 20 = 1600 kg
to be stopped in 0.2 sec.
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Person travelling in an electric wheelchair
ESTIMATE OF FORCES INVOLVED
Weight of person 80 kg
Wheelchair 100 kg
Force 20 G
Speed 50 kph
Effect (80 + 100) x 20 = 3600 kg
to be stopped in 0.2 sec.
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Restraint system for wheelchairs
Q'straint is a 4 point restraint system for wheelchairs for passenger positions, front and back.