Does anybody know how to make or have plans for a wooden boat block?

Question

I need it just for show really it has to hold just about 50 lbs.

the rope has to go through it twice and it has to have two connection points one on top the other on the bottom.

Answer 1

Actually, 50 pounds is quite a bit of weight for a block & tackle.

The single sheave (or bearing) will be at the load end and have one end as a hook to attach to the load, and the other end to accept one end of the rope - which can be eye-spliced (preferred) or knotted.

The other block just needs to hang from something.  

If you really want to build something quick & dirty, you can actually get two pieces (blocks) of wood (fir or oak is nice), about 4 inch square by 6 inches long, and get two hooks and an eye-bolt.  This is similar to the days when there were no rollers to ease the rope run.

One block will have a hole drilled though it.  Attach one hook and eye on opposite ends along the end grain.

The other block will have two holes drilled side-by-side with a hook on the end grain.  

Make sure the holes are larger than the rope by quite a bit, and soften/round  the ends of the holes to reduce rope chafing.

Run the really long rope, starting with the eyebolt, and run it to the second block before running it through the first.  then you have your block and tackle.  Greasing the rope with grease or oil helps.

No guarantees of it lifting 50 lbs, but you can try.

You can also email traditional boat building schools and museums for real sources and plans for modern wood blocks and such.

Good luck!