cant fins angle on concave bottom

General Discussion
1

I was searching about this topic and couldnt find any good info about it....

 

Whats the proper way to cant fins on concaved botton?

Ive been measuring cant direct from the bottom....so If I put 97 degrees of cant, the angle on the straight line will be less than 97.....

 

So, whats the proper way to measure cant, from straight line, or from the concave surface?

 

thank you !

 

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2

hope you understand my weird english...excuse my spelling mistakes !

cheers

3

 

looking at your diagram, look at the ‘green’.

Its the angle in excess of 90 degrees. So a proper measurement would be in the range of 0-10 degrees.

 Cant can perhaps be described as a fin leaning toward the closest rail

and is the angle in excess of 90 degrees leaning towards the rail.

Alternatively a protractor could be put to any side of the fin to measure the angle off of the perpendicular(90deg.)

 

A fin leaning towards the rail would have a positive cant of 0-10 degrees.

A fin perhaps leaning inward towards the stringer could be described with a  negative number of 0-10 degrees.

A fin straight up and perpendicular to a flat board bottom has 0 degrees of cant.

All measurments should assume a flat bottom or close to that even if there is considerable concave present.

4

thanks man...

So the green is the wright way to do it?

So I need to set a straight piece of something rail to rail to neutralize the concave or Vee , and get my cant based on a straigh line?

So my board that has 3/16 tail concave and 97 degrees of cant(measuring from concave) , actually has 95,5 degrees of cant (measuring from straight line)?

i´m quite confused

5

 

>So the green is the wright way to do it?

A: yes, but you could put a proctractor to the other side as well

 

>So I need to set a straight piece of something rail to rail to
neutralize the concave or Vee , and get my cant based on a straigh line?

A: Yes , or flat bottom.

You using glass ons? or what?

 

>So my board that has 3/16 tail concave and 97 degrees of cant(measuring
from concave) , actually has 95,5 degrees of cant (measuring from
straight line)?

A: it doesnt have 97 degrees or 95.5 degrees of cant (your from Europe?), it has either 7 degrees of cant from the 97 measurement or 5.5 degrees of cant from the 95.5 measurement.

When a fin is set at 90 degrees it is said to have 0 degrees of cant.

 

>i´m quite confused

A: it appears you are.

 

 

6

''A: it appears you are.''

hehehehehehehehehhe

thanks a lot, i got it. I´m seting fcs plugs....I´m from brazil

obrigado

Daniel