The prototype is composed of 3 or 5 metal tubes (it depends that he prefers), covered with a fabric that absorbs the water and ratchets bike to turn in a unique direction and also the structure has two ramps. The tubes form the diameter of the wheelchair wheels.
The tube cover has six buttons to close it, and also is attached to the tube with velcro.
Prototype with three tubes:
To reinforce the structure we made two triangles with the same angle as the ramp to be strong enough to support the weight of a person.
The ratchets are attached to the tubes with epoxy and silicon and also are joined to the wall with bolts.
With this movie we can se the prototype mistakes
1- The ramp is too much high, so is a bit difficult go to the structure.
2- The distance between the ramp and the first tube is too much big, so the small wheels
get into the gap.
3- The silicon and epoxy is not strong enough to join the ratchets .
Prototype with five tubes:
It has the same structure as the prototype with three tubes.
Some mistakes are the space between the tube and the ramp is very little therefore the ratchets touch the ramp.
POSSIBLE SOLUTIONS
For the ramp, we made a little hole not to touch the ramp
For the tubes we replaced the silicon for wood cylinders which are attached directly to the tube with bolts.
These are introduced inside the ratchet with a hammer, so they are strong enough to support the movements.
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