Another prototype was created using a foam pool float with some 3D printed pass-throughs for the belt. The foam was cut to the same dimensions as done previously and 4 slits were cut vertically in each corner for the pass-throughs. The 3D printed parts were then installed and a belt with a buckle was threaded through two of them and sewn to the buckle.
Findings:
The upgraded design worked better than the first and was easier to secure to the test pole than the first. It held on tight and had the advantage of the stickiness of the thin rubberized coating to prevent it from sliding up and down the pole. Other findings:
- The rubberized coating is too thin on the outward-facing side and could be easily torn.
- The foam isn’t quite as tough as that used previously and probably won’t last as long under constant wear.
- The cut edges should be sealed to prevent waterlogging
- a different type of buckle should be used as the current one is challenging to tighten around small poles.
Next steps:
A few modifications could be made to the current fender to improve some of the issues shown such as applying a rubberized coating to the outside and replacing the buckles used.
Photos:
Cutaway design of inner and outer strap connectors:
3D printed pass-throughs (right) and bird guards for bow poles (left):
Raft foam used to make prototype:
4
Cutting raft foam to size:
Closeup of strap:
Testing of the finished fender on pole:
