Everything you need to know...

[everysurfer]

Well duh, I'm talking about concave providing "lift" over say a flat bottom.

Concave provides lift when you pump it. It lets you trap a bit more pressure under the board when you push down. Flat lets the water escape more when you push down.

But the concave bottom has a bit more drag. So a flat will have a higher top speed, but a concave is quicker off the first turn.

 

[MrSteve]

Think this design has any merit? Kelly was spotted checking out JOB's lately.

 

[everysurfer]

Think this design has any merit? Kelly was spotted checking out JOB's lately.
View attachment 85250View attachment 85251

I don't see the difference between that and any other concave bottom; maybe just a bit more abrupt change close to the rail?

 

[racer1]

Concave provides lift when you pump it. It lets you trap a bit more pressure under the board when you push down. Flat lets the water escape more when you push down.

But the concave bottom has a bit more drag. So a flat will have a higher top speed, but a concave is quicker off the first turn.

I get what you're saying and that might feel like lift, but are we actually getting lift at low speeds? Top end on a wave is what maybe 20mph, yes we could experience lift, but 5-10mph? Like driving and putting your hand out the window (obviously air is not water) but you don't feel anything at low speeds, but on the freeway your hand can lift up and down.

 

[everysurfer]

I get what you're saying and that might feel like lift, but are we actually getting lift at low speeds? Top end on a wave is what maybe 20mph, yes we could experience lift, but 5-10mph? Like driving and putting your hand out the window (obviously air is not water) but you don't feel anything at low speeds, but on the freeway your hand can lift up and down.

I saw a Kelly bottom turn about 5 feet in front of me, on a shitty 3 foot wave. The force from his leg extension gave him instant speed and lift. I've never seen anyone else do something like that.

 

[griffinsurfboard]

A local shaper rode my personal 5 year old Hovercraft Tri Fin yesterday

He is now " Rethinking" many things ;-)

 

[everysurfer]

A local shaper rode my personal 5 year old Hovercraft Tri Fin yesterday

He is now " Rethinking" many things ;-)

Yea Greg, we heard you the first time

 

[griffinsurfboard]

Yea Greg, we heard you the first time

website showed it was not posted yet

You would have enjoyed hearing what he said today when I saw him .

 

[griffinsurfboard]

Just like what Tanner is experiencing -


http://instagr.am/p/B7eQpjgnjos/

 

[waxfoot]

OK, something that I have to admit that I don't know, and hoping someone like @griffinsurfboard or the like can elucidate for me, is two approaches to HPSB nose/tail rocker combinations.

Specifically, I notice that some boards are described as 'Higher nose rocker with lower tail rocker' whereas others are described as 'Lower nose rocker but more tail lift'. Within the context of high performance boards , what's the thinking / intent behind the two school of thought / design ?

 

[HotHail]

What's this?

Pointed noses suffer less "baseball bat effect" and are easier to hold in rail turns;

Yeah, what the hell is "baseball bat effect"? When I Google it, I just get a bunch of references to guys doing penis enlargement and getting weird shaped dicks. Seriously.

 

[paunch23]

I didnt get this one: “2. The more area of the surfboard is in contact with the water, the more friction drag will exist and, the slower the surfboard will be;”
Longboards aren’t slow....stubby boards aren’t slow....

 

[VonMeister]

Longboards are slow.

 

[000]

now we need a stab in the dark with all the same board, only differences are the bottom contours. mick gonna rip more on a flat bottom? triple concave? channels?