# Surfboard fin’s /foil’s

**URL:** <https://discourse.shapr3d.com/t/surfboard-fin-s-foil-s/19448>\
**Category:** Modeling Questions\
**Created:** [May 21, 2022, 2:39pm UTC](https://discourse.shapr3d.com/t/surfboard-fin-s-foil-s/19448 "2022-05-21T14:39:38Z")\
**Posts on this page:** 10\
**Page:** 1

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**Author:** ![Alex1](https://avatars.discourse-cdn.com/v4/letter/a/898d66/32.png) [@Alex1](https://discourse.shapr3d.com/u/Alex1)\
**Post date:** [May 21, 2022, 2:39pm UTC](https://discourse.shapr3d.com/t/surfboard-fin-s-foil-s/19448/1 "2022-05-21T14:39:38Z")

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Hi, having a Meltdown trying to design surfboard fin’s.  
Sure I can draw a foil but can’t figure how to extrude the shape.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/a/a38e0ce890bc16f97f182f24a340047131d7e290.jpeg)  
Please help!.

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [May 21, 2022, 4:22pm UTC](https://discourse.shapr3d.com/t/surfboard-fin-s-foil-s/19448/2 "2022-05-21T16:22:38Z")

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Here’s a start using guided loft. The top of the fin needs fixing. Not sure how to do that yet. Other’s may be able to assist here or offer a different approach.

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**Author:** ![Alex1](https://avatars.discourse-cdn.com/v4/letter/a/898d66/32.png) [@Alex1](https://discourse.shapr3d.com/u/Alex1)\
**Post date:** [May 22, 2022, 12:17am UTC](https://discourse.shapr3d.com/t/surfboard-fin-s-foil-s/19448/3 "2022-05-22T00:17:20Z")

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Hi, many thanks.

Will give it a go today.

Thanks again

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**Author:** ![JST](https://avatars.discourse-cdn.com/v4/letter/j/edb3f5/32.png) [@JST](https://discourse.shapr3d.com/u/JST)\
**Post date:** [May 22, 2022, 8:34am UTC](https://discourse.shapr3d.com/t/surfboard-fin-s-foil-s/19448/4 "2022-05-22T08:34:20Z")

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Here is two kind of solution, may be help.  
These made for aeromodel’s fin/rudder.

[![](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/2/9/29f93e46fb63a4c191a3e3cdbd56430aefefa507.jpeg "Fin with loft 2 in Shapr3D") ](https://www.youtube.com/watch?v=295MapU279k)

[![](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/d/5/d54970b1183fe3a8e11046d543d67a8c74a3a0c9.jpeg "Fin with loft, in Shapr3D") ](https://www.youtube.com/watch?v=ap6qS3hT2-A)

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**Author:** ![Alex1](https://avatars.discourse-cdn.com/v4/letter/a/898d66/32.png) [@Alex1](https://discourse.shapr3d.com/u/Alex1)\
**Post date:** [May 22, 2022, 12:15pm UTC](https://discourse.shapr3d.com/t/surfboard-fin-s-foil-s/19448/5 "2022-05-22T12:15:32Z")

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Thank you

Will give my full attention tomorrow morning

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**Author:** ![Xiamen0592](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xiamen0592/32/12386_2.png) [@Xiamen0592](https://discourse.shapr3d.com/u/Xiamen0592)\
**Post date:** [May 22, 2022, 12:16pm UTC](https://discourse.shapr3d.com/t/surfboard-fin-s-foil-s/19448/6 "2022-05-22T12:16:29Z")

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Hi,there. Is this what you need?

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**Author:** ![Alex1](https://avatars.discourse-cdn.com/v4/letter/a/898d66/32.png) [@Alex1](https://discourse.shapr3d.com/u/Alex1)\
**Post date:** [May 22, 2022, 12:22pm UTC](https://discourse.shapr3d.com/t/surfboard-fin-s-foil-s/19448/7 "2022-05-22T12:22:49Z")

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Not quite, but is is a help

Thanks

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [May 23, 2022, 6:19am UTC](https://discourse.shapr3d.com/t/surfboard-fin-s-foil-s/19448/8 "2022-05-23T06:19:06Z")

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I think this version will work for you.

[![](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/9/5/9597872afa2f12ce90c55ba3fd0918d0993a60a8.jpeg "Surfboard Fin") ](https://www.youtube.com/watch?v=vSTOV8QT-rc)

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [May 23, 2022, 3:34pm UTC](https://discourse.shapr3d.com/t/surfboard-fin-s-foil-s/19448/9 "2022-05-23T15:34:01Z")

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I have attached the Shapr3D file here for your reference. Use as you wish.

Regarding my video: After I loft the main fin at 29 secs, I sketch a line that bisects the upper oval sketch. This is needed to do the 2nd loft. That line (at the red arrow) is part of the oval plane. The vertical plane also has a line there as part of the half oval. Both lines share the same 3D space.

[Surfboard Fin.shapr](https://discourse.shapr3d.com/uploads/short-url/y7brUVvEBdo5eKQs6ACuEVj9uDf.shapr) (158.8 KB)

 ![Surfboard Fin](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/f/f6637cc1d2b1e67930ee88253623090a22b64c56.jpeg)

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<div class="post-metadata">

**Author:** ![Alex1](https://avatars.discourse-cdn.com/v4/letter/a/898d66/32.png) [@Alex1](https://discourse.shapr3d.com/u/Alex1)\
**Post date:** [May 27, 2022, 6:34am UTC](https://discourse.shapr3d.com/t/surfboard-fin-s-foil-s/19448/10 "2022-05-27T06:34:13Z")

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I’m struggling to download. Thanks  
Will try again