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#2894767 - 01/06/19 05:22 PM Bottom contours and channels
patrolman Offline
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To those of you using or shaping boards with channels what bottom contours do you use? Can you have some concave or would the board get "sticky"? Vee? Concave in front of the channels? Just plain flat?

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#2894841 - 01/06/19 09:16 PM Re: Bottom contours and channels [Re: patrolman]
ghostshaper Offline
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Assume you're asking about tail channels, since belly channels are part of the bottom contours.

I like single to double to vee out the back. All slight. I've tried extreme single and extreme flat (grin). They all worked for me, but I'm not super picky about bottom contours.

I like widening channels to anchor the tail down a little. Most everyone will have a different opinion about what channels actually do.
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#2894856 - 01/06/19 09:43 PM Re: Bottom contours and channels [Re: patrolman]
Maz Offline
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My Byrning Spears has six deep channels set in a single to spiral vee bottom. No stickiness, and feels absolutely 'normal', except somehow supercharged and with insane hold.

And just for if GG reads this and has a heart attack over the use of 'spiral vee', I mean vee bottom with concaves either side of the stringer.

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#2894903 - 01/07/19 05:12 AM Re: Bottom contours and channels [Re: Maz]
Greg Griffin Offline
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There is nothing "Spiral" about Double Concave

Spiral is wider circle reducing to smaller circle , like roll tapering to Vee

Alan started doing single to double concaves in his boards around 1983 .
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#2894983 - 01/07/19 11:34 AM Re: Bottom contours and channels [Re: Greg Griffin]
need 4 speed Online   content
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Originally Posted By: Greg Griffin
Spiral is wider circle reducing to smaller circle , like roll tapering to Vee


won't the reduction in template width do this naturally( for the most part)?
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#2895011 - 01/07/19 12:30 PM Re: Bottom contours and channels [Re: Greg Griffin]
Maz Offline
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Originally Posted By: Greg Griffin
There is nothing "Spiral" about Double Concave

Spiral is wider circle reducing to smaller circle , like roll tapering to Vee

Alan started doing single to double concaves in his boards around 1983 .


Well, that one wasn't hard to predict.

If I just wrote single to double, it could mean the now standard 'double within a single' (i.e., single with subtle spine).

Just for clarification, what is the consensus in GG World on what to call what the rest of the surfing world knows as spiral vee?

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#2895028 - 01/07/19 12:49 PM Re: Bottom contours and channels [Re: Maz]
Greg Griffin Offline
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"Just for clarification, what is the consensus in GG World on what to call what the rest of the surfing world knows as spiral vee?"

What it visually is - Double Concave


And Maz

When a friend became #2 shaper in the world , he used the term Spiral Vee for Double concave - soon after I saw others making laminates for this on their boards .

My observation is that this attention created its popularity .

Lots of interesting things in this industry .
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#2895146 - 01/07/19 03:59 PM Re: Bottom contours and channels [Re: Greg Griffin]
patrolman Offline
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Originally Posted By: Greg Griffin
"Just for clarification, what is the consensus in GG World on what to call what the rest of the surfing world knows as spiral vee?"

What it visually is - Double Concave


And Maz

When a friend became #2 shaper in the world , he used the term Spiral Vee for Double concave - soon after I saw others making laminates for this on their boards .

My observation is that this attention created its popularity .

Lots of interesting things in this industry .


Greg I know you like flat bottoms and do a lot of channels. Are you channel bottoms flat?

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#2895157 - 01/07/19 04:21 PM Re: Bottom contours and channels [Re: patrolman]
000 Offline
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i do wonder who decided this was the correct channel shape, and why


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#2895174 - 01/07/19 04:49 PM Re: Bottom contours and channels [Re: patrolman]
Greg Griffin Offline
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Yes I do them on my flat bottoms .

I used to do a very slight Tri Plane to Vee then Flat off the tail , 1973- 1990

My longboards had this till 2007
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#2895182 - 01/07/19 05:03 PM Re: Bottom contours and channels [Re: 000]
Greg Griffin Offline
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000

most run the channels further up in the center - opposite of your pic

AB reduced the center channel depth nearing the tail .

This one does not - Soo ??? wave2
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#2895216 - 01/07/19 05:54 PM Re: Bottom contours and channels [Re: patrolman]
000 Offline
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i mean the shape of the channel as if youre looking at a cross section, perpendicular to the stringer (couldnt find that pic)

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#2895273 - 01/07/19 07:28 PM Re: Bottom contours and channels [Re: 000]
Greg Griffin Offline
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Square channels have been for a long time. Greg Noll slot bottom .

Late 70's AB lived on the West Side , his channels were round then .

On the North Shore Mike Croteau was making his Air Boards with Square channels .

Very possible this influenced AB's change to square shaped ones .
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#2895507 - 01/08/19 12:22 PM Re: Bottom contours and channels [Re: Greg Griffin]
Maz Offline
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Registered: 05/18/04
Posts: 953
Loc: Innzid
Originally Posted By: Greg Griffin
"Just for clarification, what is the consensus in GG World on what to call what the rest of the surfing world knows as spiral vee?"

What it visually is - Double Concave


And Maz

When a friend became #2 shaper in the world , he used the term Spiral Vee for Double concave - soon after I saw others making laminates for this on their boards .

My observation is that this attention created its popularity .

Lots of interesting things in this industry .


I'm a bit confused, GG. Would you call a vee bottom with concaves on the vee panels (what I call spiral vee) double concave? And a single with an inset double the same?

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#2895523 - 01/08/19 12:58 PM Re: Bottom contours and channels [Re: Maz]
Greg Griffin Offline
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Inset or not even you call it a double , because thats what it is .

Spiral Vee is from the 60's reborn by famous shapers later as double concave .

Part of the fun being around this for this long .

Be entertained by all this , it is pretty silly wave2
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