# Production Downwind Boards

**URL:** <https://forum.progressionproject.com/t/production-downwind-boards/1121>\
**Category:** Downwind Foil\
**Created:** [December 12, 2022, 2:12pm UTC](https://forum.progressionproject.com/t/production-downwind-boards/1121 "2022-12-12T14:12:28Z")\
**Posts on this page:** 1\
**Showing post:** 34

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**Author:** ![Matt](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@Matt](https://forum.progressionproject.com/u/Matt)\
**Post date:** [April 4, 2023, 8:02am UTC](https://forum.progressionproject.com/t/production-downwind-boards/1121/34 "2023-04-04T08:02:14Z")

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Thanks that is very interesting! I think you’ve maybe missed the consideration for at speed touchdowns. I’ve been riding a DIY board with hard chines that looks very similar to your DIY. While I haven’t managed to compare an equivalently rounded bottom board, I can say that the super long rail line seems to manage touchdowns pretty well, but occasionally I can feel that hard long line stick to the water if I hit the water at an angle (winging or prone). I wonder if the canoe bottom will re-attach differently at speed, better or worse? I think the chines differ depending on the roll angle the board touches down.

Edit: some info from the other thread, @Beasho do you have any more info on chine/round consideration? My experience as a very poor winger is that the square edges only were an issue winging, and sometimes in prone when a wave caught at an awkward angle.

> [@Ultralight Downwind SUP Board Design](https://forum.progressionproject.com/t/ultralight-downwind-sup-board-design/1598/4):
>
> PS: One pro-level winger stated that the square edges would catch on touchdown and “track uncontrollably.” But what we are finding with these shapes is that touchdowns _almost_ don’t matter. The board touches, and its nearly unnoticeable, they just keep moving. No skip, no drag. The Gong guy described it as indiscernible between glide on the water and flight.

Now that I’ve tried 2 boards and hopefully an Apple skipper soon, I will say that weight is a factor that may start to matter to me as the whole point is to enjoy riding the thing once you are up (and durability so will avoid the poor reputations).

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