CrispCritter said...
Good setup but I would make one suggestion to improve on it.
It appears that your spacing between pulleys is based on the distances between your ceiling joists. If you place two struts from joist to joist at each end of your system it will allow you to bring your pulley anchors closer together, this will reduce your load angles as you approach the point of chock-a-block so that the force required at the top of your hauling is much closer to that at the bottom. In short a hell of a lot easier.
Your setup at the moment will effectively be increasing the load at the top of your haul by approximately %160 through to %190, almost double. With each set of anchor pulleys within 100mm of each other, and still with your 1900mm spacing between the two sets, the load will remain at close to %50 to %60, virtually half the load rather than double the load, on each set from the bottom to almost the top of the haul. You can add a single pulley at the haul end at any distance that will allow your haul rope to be clear the body of the board.
The other benefit of changing these angles is that there will be considerably less strain on your haul rope and anchor bolts. This will make it less likely that one or the other could fail over time, and drop your board onto your car.
Hey CrispCritter
Wow where were you when i need you. You were right i just whacked the eye bolts in where i could find ceiling joists and went from there. Many thanks for your advice I will make some changes as per your suggestions as it looks to be sound advise. The good news is even my 9 year old son can easily lift the SUP up only being 12KG as can the Trouble and strife. Many thanks for your advice. Cheers oldboy