constant curve or flat planing area

i  have  a  question  about the bottom shape. is  it  neccisary to  have  constant curve  on  the bottom. or could  i take say  a  longboard  and  create  a  3  foot  flat  area  in  the  center  and  create a  planing  surface for  slow  sections  in the  wave.   does  this make  sense or  am  i  headed  in  the  wrong  direction.  also  for a noserider  is it  better  to  have  a  shorter  steeper rocker  in the  tail  or  more  gradual.

See if this helps

i dont  know  if   i  really  find  my  answer. i  understand  it’s  a  good method  of  creating a  template  for  your  curve  throught  the  bottom. but  i  wonder why  not  have  a  portion  of the  bottom  be  completely  flat.  maybe  i  missed  something.

Constant curve. It doesn't mean that you have to have major rocker going on throughout the board. Instead, if you want a "flatter" rocker, then you should have a super super subtle curve going on. Flat spots are a no go.

A way to test this to make sure that your shape is flatter but not flat is to take a level or any other long straight edge, and put it parallel to the stringer, then rock it back and forth like a rocking chair. If you have a flat spot you'll know it cause your straight edge will stop rolling for a split second.

As for the noserider question, go with the flip in the tail, or as youput it, "short and steep." You don't want this to be your only form of tail rocker though. Make it gradual all the way to the last foot or so and then kick it fast.

I'd go with about and inch or two less nose rocker than tail rocker. nose can be thin too, to cause the nose rocker to flatten when you are standing on the tip. Go with a wider tail (16 1/4") or so, flat deck at the nose, bellied bottom, slight nose concave depending on what you like, and make your rails round and 50/50. Big fin too.

If you wanna check out longboard rockers go to harbour surf's website and click on the board.

Constant curve. It doesn't mean that you have to have major rocker going on throughout the board. Instead, if you want a "flatter" rocker, then you should have a super super subtle curve going on. Flat spots are a no go.

A way to test this to make sure that your shape is flatter but not flat is to take a level or any other long straight edge, and put it parallel to the stringer, then rock it back and forth like a rocking chair. If you have a flat spot you'll know it cause your straight edge will stop rolling for a split second.

As for the noserider question, go with the flip in the tail, or as youput it, "short and steep." You don't want this to be your only form of tail rocker though. Make it gradual all the way to the last foot or so and then kick it fast.

I'd go with about and inch or two less nose rocker than tail rocker. nose can be thin too, to cause the nose rocker to flatten when you are standing on the tip. Go with a wider tail (16 1/4") or so, flat deck at the nose, bellied bottom, slight nose concave depending on what you like, and make your rails round and 50/50. Big fin too.

If you wanna check out longboard rockers go to harbour surf's website and click on the board.

Flat spots create an area of the board where an incremental increase in turning pressure will not change the track of the board.  It won’t be until the force being applied overcomes the flat spot’s resistance, and the board ‘over turns’.

or

flat spots create a sticky spot in the turn where the board will feel stiff, until it spins out.

i understand  what  you  guys  are  saying and creating  the curve  is  not  the problem  for  me.  i’m just  playing  with  design concept. the  more i  learn the  more  light bulbs  go  off  in my  head. if the  flat  spot  is  sticky  wouldn’t  it   cause  you  to  make  more  of  a  pivot  turn. whereas  you  have  to  step  back  on  the  board  enough  to  pick    the  flat spot up out  of the  water  swing  it  around  and  lay it  back  down, step  foward  to  the  flat  area and  pick  up  speed again. maybe thats just  not the way  things work and  im making it more complicated   than  it  is. i  also  prefer  more  paralell knifey  rails.

No.  If you have to go through that much effort of stepping back, lifting the nose, swinging it around, and stepping forward to pick up speed, the wave already passed you by.

You can change the rocker curve to make a board turn vs. speed, but a flat spot sticks.

You can go with a flat spot in the middle of your board, and it would pick up speed when you step forward like you are saying. The "flat" spot will not be completely flat though, just a long arced curve.

I don't know what your riding now, but if you take my advice in my earlier post with a wider tail and wider nose, speed will not be a problem.

And no, a flat spot will not cause you to pivot, because pivoting would be happening at the tail, not the "flat" spot. Typically when you add more of a design element, you lose more of another. A flatter spot would be faster, but you'd lose maneuverablity.

I don't now what types of waves you are gonna surf this in, but when I surf my noserider, it is in smaller surf. if the wave is going fast i will be at the tip, and if it slows down, i'll walk back , and do a pivot type turn, and wait for the  thing to pick up and walk back again. if you did a turn when you should be on the tip then yes, the wave will pass you up. A nose rider specifically built to noseride really good will not be as manueverable, but will noseride like nobody's business.

Good luck

i ride  my boards  in just about  anything  southern california  throws  at  me. so  it’s  not  neccisarily  small  surf. i  didn’t  mean the flat  spot  would cause you  to  pivot  i  meant  it  would force  you  to  step  back and  pivot  the  board, which  in my  mind  really  doesn’t take  all  that  much effort  compared  to  all the  kids  these  days  running  to  the  nose  and  back several  times  on  a  wave.  the board i  ride  now  actually  has  a  small  amount  of  flat  spot, with  down  hard parrallel rails,  and  a  drawnout   pintail  with  v.  it has it’s  pros  and it’s  cons, but  i’m  capable of turning the board anywhere i’m at, from the nose to the tail. but i think i want a traditonal noserider so i’ll probably take your advice, thanks for the knowledge and input.