Getting 'square' root edges on balsa fins?

Discussion in 'Techniques' started by Tom, Jul 7, 2019.

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  1. Jul 7, 2019 #1

    Tom

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    Got any tips or pointers on how to get a nice straight and square root edge on balsa fins?

    Seems like mine always end up kind of rounded from stem to stern.

    I use a sanding block, also have tried putting the sandpaper on the table and sand on that.

    Short of using a table sander that is :D
     
  2. Jul 7, 2019 #2

    lakeroadster

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    Fixturing is the key. You need a perpendicular surface in which to place the fin in relation to the sandpaper.

    You can build your own with some scrap pieces of lumber or, as you eluded to, buy a small bench sander..... which if you do, you'll wonder how you ever lived without it.

    Sanding Jig.jpg
     
    Last edited: Jul 7, 2019
  3. Jul 7, 2019 #3

    Tom

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    Nice that's a good idea. Thanks for taking the time.
     
  4. Jul 7, 2019 #4

    heada

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    Shooting board with a good plane.
     
  5. Jul 7, 2019 #5

    Tom

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    What is a shooting board?
     
  6. Jul 7, 2019 #6

    heada

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  7. Jul 8, 2019 #7

    lakeroadster

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    I've learned a 737 isn't a good plane... And I've learned an ironing board makes a great shooting board. All from the internet, so it must be true.

    That all sounds really pricey though.
     
  8. Jul 8, 2019 #8

    David Schwantz

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    Place wood on table, use table edge as guide for sanding block. Works great for bevels also.
     

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