In addition to the solutions below you want to see my idea for a strategy that you could use to find a solution.

Suggested Strategy

I found 48 different Spinsum solutions.
Are there any more?

 1 2 4 8 3 5 6 7

 1 2 7 6 3 8 4 5

 1 4 3 8 7 6 2 5

 1 6 3 5 4 8 2 7

 2 1 5 8 3 4 7 6

 2 1 8 6 3 7 5 4

 2 3 4 6 1 5 7 8

 2 3 7 4 1 8 5 6

 2 5 1 8 7 4 3 6

 2 5 3 7 8 6 1 4

 2 7 1 5 4 6 3 8

 2 7 3 4 5 8 1 6

 3 2 5 6 1 4 8 7

 3 2 8 4 1 7 6 5

 3 4 1 8 5 2 6 7

 3 6 1 7 8 4 2 5

 3 6 5 2 1 8 4 7

 3 8 1 4 5 6 2 7

 4 1 6 8 7 3 5 2

 4 3 2 8 5 1 7 6

 4 5 1 6 3 2 7 8

 4 5 7 3 6 8 1 2

 4 7 3 2 1 6 5 8

 4 7 5 1 2 8 3 6

 5 2 4 8 7 1 6 3

 5 2 6 7 8 3 4 1

 5 4 2 6 3 1 8 7

 5 4 8 3 6 7 2 1

 5 6 7 1 4 8 2 3

 5 8 3 1 2 6 4 7

 6 1 8 5 4 3 7 2

 6 3 4 7 8 1 5 2

 6 3 8 2 1 5 7 4

 6 5 8 1 4 7 3 2

 6 7 1 5 8 2 3 4

 6 7 4 3 8 5 1 2

 7 2 6 5 4 1 8 3

 7 2 8 4 5 3 6 1

 7 4 6 2 1 3 8 5

 7 4 8 1 2 5 6 3

 7 6 2 5 8 1 4 3

 7 6 5 3 8 4 2 1

 7 8 1 3 6 2 4 5

 7 8 4 1 6 5 2 3

 8 3 6 4 5 1 7 2

 8 5 6 1 2 3 7 4

 8 7 2 3 6 1 5 4

 8 7 5 1 6 4 3 2

You may want to print out the solutions, cut out each windmill and arrange them into groups. This may help you spot patterns.

Open in full window