Cheers Tony. Appreciate the comments. It's a hard one to explain but glad it makes some sense. It's all relative to the whole board design and sometimes your making concaves to offset or enhance some other feature of the board. Outline shape rocker and foil probably the 3 most important ones. Most good shapers have the concaves pretty well sorted got the board. You might just find certain features work well for your surfing at your local break that you identify as you ride a few different boards. Cheers for watching and taking time to comment 🤙
Great videos mate. Helpful for noobs such as myself. I was thinking it’d be super helpful if you had playlists or channels set up by board type, groveller, longboard, tech talk etc. just an idea. Anyway, keep up the great work.
From my experience double concave: speed. Single concave, lots of lifting. V on the back help with transition from rail to rail. Amount of fins also add to this. And so many other variations.
Yeah mate I would agree totally with the cancaves.. Bit confusing how different they are or are not depending on if it's true Double concave i.e. not deeper in the water than the rail or vee with double i.e. Vee deeper in the water than the rail but with a doble on the vee pannels.. I think that gives an ability to have a more extreme version of a flater stringer rocker and an accelerated rail rocker off the back.. You can essentialy go to the extreme of having an almost flat stringer rocker and a fairly pronounced rail rocker at the tail as long as you dont mind the tail thinning out.. The Machado creeper and many retro boards seem to use this to good effect.. Good trick to get fish turning better
I don't understand something. When you say the double concave channels water out towards the fins, that sounds good but there's water everywhere under the board. There's not just two torrents heading towards the fins.
Yeah fair comment and I’m definitely no hydrodynamics expert these are just the generally held understandings of the concepts. I guess it’s like an aeroplane too though the air is everywhere around the plane but the way it flows though the wings creates a pressure differential that causes lift. Same with fins ok they cause drag too but they are in the water and the difference in the foils creates “lift” or drive. If you bottom turned without fins in bot sure if you could leverage the same drive even if you had a more free down the line speed. Again I’m not really sure myself and neither are most people but those are the general documented concepts. Hope that helps. Cheers 😊
If you push a boat through water it directs the water flow and causes it to lift too. I know everything is in the water but the body has a speed that it moves through the water and that is what causes the interaction i think but again. No hydrodynamics experts. Cheers
Kevin Rhee thanks Kevin. How do you mean share my material? Happy to share the knowledge. There are a few articles on the internet on concaves. Probably have a little more experience how too. Have been shaping my own boards so got to try a few shapes contours and rockers as I have shaped them..been pretty interesting
@@naivhear887 Happy reading :-) www.boardcave.com/the-surfers-corner/surfboard-bottom-contours/ barefootsurftravel.com/livemore-magazine/surfboards-bottom-contour www.surfscience.com/topics/surfboard-design-and-anatomy/bottom-contour/different-concaves-for-your-waves www.swellnet.com/news/design-outline/2017/03/17/bottom-contours-part-2 This one has a complete design and build guide but you have to sign up. It’s legit and they don’t bug you. This is the one I read while making my own. Cheers greenlightsurfsupply.com/pages/surfboard-bottom-contour-design-greenlight-surfboard-design-guide
@@naivhear887 Some can be a little contradictory.. Personally I don't think you can go far wrong with variances of Single, Double, Vee. That can be single, double vee on modern boards. Long vee double on grovellors and some more retro styles or Single to long vee double I really like on Mid to long boards myself. Keeping it subtle and simple seems to make it go fast in weaker slower waves, concaves seem to come into their own more as more water moves through the board.. That's my personal opinon.. No expert by any means .. Hope this helps
Nice video. Have you ever surfed a MC Coy? And if so, what do you think of his ideas about surfboard design? And can you do a video about different rails on surfboards? Greetings from the Netherlands
Cheers buddy. Yeah have ridden a McCoy back in the day but that was a Nugget and it was in surftech.. I called it the wobbler as you stood on the back and the front just waggled around all over the shop but that was a 7'6" and in Tuflight. He has some pretty awesome theory's though definitely think he's a groundbreaker with some stuff and a lot of his ideas make sense. Hmm Rails I don't know as much about the science of rails but understand low, pinched 50/50 egg round and all that so not a bad idea. Maybe something I could do in the future if I do a bit of research. See how many people watch and like this. Have done a few bits on fins etc in the past and I often think it's maybe the tech stuff is'nt peoples cup of tea as much as boards.
@@lawson45uk I think the tech stuff is important to know if you want to pick the right surfboard that suits your style and abilities. So don't stop making videos like these. I really appreciate the time you put in making them. Greetings
@@gordonflash3698 Yeah mate I absolutely agree. Concaves, fins rocker rails etc all very important. Largely overlooked and people less keen to know about it sometimes I think unfortunately.
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Awesome explanation...Its nice to see it explained in detail.
Cheers Tony. Appreciate the comments. It's a hard one to explain but glad it makes some sense. It's all relative to the whole board design and sometimes your making concaves to offset or enhance some other feature of the board. Outline shape rocker and foil probably the 3 most important ones. Most good shapers have the concaves pretty well sorted got the board. You might just find certain features work well for your surfing at your local break that you identify as you ride a few different boards. Cheers for watching and taking time to comment 🤙
Great videos mate. Helpful for noobs such as myself. I was thinking it’d be super helpful if you had playlists or channels set up by board type, groveller, longboard, tech talk etc. just an idea. Anyway, keep up the great work.
From my experience double concave: speed. Single concave, lots of lifting. V on the back help with transition from rail to rail. Amount of fins also add to this. And so many other variations.
Yeah mate I would agree totally with the cancaves.. Bit confusing how different they are or are not depending on if it's true Double concave i.e. not deeper in the water than the rail or vee with double i.e. Vee deeper in the water than the rail but with a doble on the vee pannels.. I think that gives an ability to have a more extreme version of a flater stringer rocker and an accelerated rail rocker off the back.. You can essentialy go to the extreme of having an almost flat stringer rocker and a fairly pronounced rail rocker at the tail as long as you dont mind the tail thinning out.. The Machado creeper and many retro boards seem to use this to good effect.. Good trick to get fish turning better
I don't understand something. When you say the double concave channels water out towards the fins, that sounds good but there's water everywhere under the board. There's not just two torrents heading towards the fins.
Yeah fair comment and I’m definitely no hydrodynamics expert these are just the generally held understandings of the concepts. I guess it’s like an aeroplane too though the air is everywhere around the plane but the way it flows though the wings creates a pressure differential that causes lift. Same with fins ok they cause drag too but they are in the water and the difference in the foils creates “lift” or drive. If you bottom turned without fins in bot sure if you could leverage the same drive even if you had a more free down the line speed. Again I’m not really sure myself and neither are most people but those are the general documented concepts. Hope that helps. Cheers 😊
If you push a boat through water it directs the water flow and causes it to lift too. I know everything is in the water but the body has a speed that it moves through the water and that is what causes the interaction i think but again. No hydrodynamics experts. Cheers
Hi! Great video, really instructional! Would you share your material on bottom contours?
Kevin Rhee thanks Kevin. How do you mean share my material? Happy to share the knowledge. There are a few articles on the internet on concaves. Probably have a little more experience how too. Have been shaping my own boards so got to try a few shapes contours and rockers as I have shaped them..been pretty interesting
@@lawson45uk I was referring to the chart that shows the details of the bottom contours with the single to double to vee, and any other like it!
@@naivhear887 Happy reading :-)
www.boardcave.com/the-surfers-corner/surfboard-bottom-contours/
barefootsurftravel.com/livemore-magazine/surfboards-bottom-contour
www.surfscience.com/topics/surfboard-design-and-anatomy/bottom-contour/different-concaves-for-your-waves
www.swellnet.com/news/design-outline/2017/03/17/bottom-contours-part-2
This one has a complete design and build guide but you have to sign up. It’s legit and they don’t bug you. This is the one I read while making my own. Cheers
greenlightsurfsupply.com/pages/surfboard-bottom-contour-design-greenlight-surfboard-design-guide
@@naivhear887 Some can be a little contradictory.. Personally I don't think you can go far wrong with variances of Single, Double, Vee. That can be single, double vee on modern boards. Long vee double on grovellors and some more retro styles or Single to long vee double I really like on Mid to long boards myself. Keeping it subtle and simple seems to make it go fast in weaker slower waves, concaves seem to come into their own more as more water moves through the board.. That's my personal opinon.. No expert by any means .. Hope this helps
Nice video. Have you ever surfed a MC Coy? And if so, what do you think of his ideas about surfboard design? And can you do a video about different rails on surfboards? Greetings from the Netherlands
Cheers buddy. Yeah have ridden a McCoy back in the day but that was a Nugget and it was in surftech.. I called it the wobbler as you stood on the back and the front just waggled around all over the shop but that was a 7'6" and in Tuflight. He has some pretty awesome theory's though definitely think he's a groundbreaker with some stuff and a lot of his ideas make sense. Hmm Rails I don't know as much about the science of rails but understand low, pinched 50/50 egg round and all that so not a bad idea. Maybe something I could do in the future if I do a bit of research. See how many people watch and like this. Have done a few bits on fins etc in the past and I often think it's maybe the tech stuff is'nt peoples cup of tea as much as boards.
@@lawson45uk I think the tech stuff is important to know if you want to pick the right surfboard that suits your style and abilities. So don't stop making videos like these. I really appreciate the time you put in making them. Greetings
@@gordonflash3698 Yeah mate I absolutely agree. Concaves, fins rocker rails etc all very important. Largely overlooked and people less keen to know about it sometimes I think unfortunately.