SR article

Final modified e-tricycle

With the new design chosen, the prototype of the Pedi-Teksi is ready to be modified to the Chameleon. For the modification, we got help of from a mechanic of CooP, he has played an important role to accomplish the final result. The mechanice has helped finding and buying materials, doing the modification and has given advice.

The film of the modification can be viewed here.



The red colour of the Pedi-Teksi did not match the idea of Chameleon. Two different colours of paint, light blue and light green, provide a different appearance to the Pedi-Teksi. The two colours are painted with a gradient so the colours run smoothly into each other. The steering wheel, frame and the outside of the trunk are painted. On the outside of the trunk,  stickers are placed with the logo and the brand name of Chameleon.



A strong construction of steel has been made and placed in the trunk. This frame is build to keep the batteries and refrigerator in place. Also the frame provides a construction for the work desks. Since there are two batteries needed, one for the pedal assistance and one for the refrigerator, and the weight on the trunk needs to be well balanced, one is located on the left and one is located on the right side.

The frame was cut from steel tubes and welded together. With bolts it is put in place and it is painted to get a better appearance.

The refrigerator is placed in the middle of the frame and in order to absorb shocks, temporary a shock absorber of styrofoam is placed between the floor and the bottom of the refrigerator. A better absorber is advisable when the Chameleon will operate on a daily basis.



On top of the frame is there are two work desks. Underneath there is storage space. The shelves and work desks are made of plastic material. Wood would bend after some time and metal is too expensive and could oxidate. The plastic material bought was cut into the proper size and then glued on the frame. However, it turned out that the material isn’t that strong as anticipated and it breaks easily. Kit was needed to attach it because putting in screws would make the plastic break. For running the pilot this material is fine, but when it will be used more intensively, an alternative has to be found for this material and the plastic should be replaced.

Al bin for waste of the vendor and the customer is also added. Using this will improve the environment and would give the Chameleon a green image.

During the pilot the focus was on the frame but a rotatable chair can always be implemented when it is proven necessary.


The Hood

The hood has been enlarged by adding an extension in between the current frame. New steel beams were cut in the same length and welded onto both ends of the old frame so it has an extension. A new and bigger fabric hood made that is compatible with the bigger frame. This hood will provided shade for the driver.


Pedal assistance and gears

The red Pedi-Teksi that was modified to was a prototype and unfortunately the electrical controller for the pedal assistance was not working properly. It was not optimised and couldn’t go backwards. First, this needed to be fixed and repaired by electrical engineers. However, the electricians were not able to fix the controller. Some materials that were needed for the reparation were not available in Uganda. Due to this, the frame could not be used before the pilot started. Fortunately, the frame of another working Pedi-Teksi could be used as a replacement at the time of the pilot and the frames were temporary swapped. After the pilot, CooP will fix and replace the controller of the prototype so the original Chameleon frame can be used for the business.

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