Fin Thickness for Estes Hi Flyer?

Discussion in 'Low Power Rocketry (LPR)' started by Tom, Jul 25, 2019.

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  1. Jul 25, 2019 #1

    Tom

    Tom

    Tom

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    Quick question. I am drawing a fin jig for an Estes Hi Flyer.

    BT-20 with three fins. I measured the fin thickness with a cheap micrometer and got 1/16". Is that correct?

    I printed out the template with 1/16" thick fins but it seems awfully thin!

    Thanks.
     
  2. Jul 25, 2019 #2

    Rex R

    Rex R

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    once you get a layer or three of paint* on them they get stronger, 1/16" works fine, just get the grain paralelel to the leading edge of the fins.
    *or paper.
     
  3. Jul 25, 2019 #3

    readytorock556

    readytorock556

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    I painted the entire rocket with 20minute finishing resin thinned with acetone. Soaks into the balsa pretty well. You do have to do a little sanding to get a good finish, but the fins are strong.
     

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