This was for the manufacturing of the product to test to see whether the hinges were strong enough and whether less material could be used to save production costs.
This was found that less material could be used but the product could not be manufactured in its current state. So the hinge was changed to a more developed design
The new design of the hinge was better at dispersing the weight being apply by a 25 stone person
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AirBus
Create a Wheel Chair To fit in an over head locker on a plane