What is flex tail?

What is flex tail?

Post by Reul » Sun, 11 Dec 1994 12:15:53


Someone refered to Mistral's adjustable flex tail a short time back. What
is it?
 
 
 

What is flex tail?

Post by Reid » Wed, 14 Dec 1994 14:15:43


writes:

Quote:
>Someone refered to Mistral's flex tail a short time back. What is it?

Mistral was promoting a board design that incorporated a flexible tail
section. The amount of flexibility was varied by adjusting some
compression spings situated in a gap between the bottom planing surface
and the solid deck section above.
                Reid

 
 
 

What is flex tail?

Post by Stacey Sope » Thu, 15 Dec 1994 00:35:43

Quote:
> Someone refered to Mistral's adjustable flex tail a short time back. What
> is it?

Some years back (about 4-5) Mistral produced a boad based on the
flex tail work of Mike Tinkler. Mike was making poly boards on Maui
at the time. These had a thin tail which allowed the board to flex when
 in a jib or turning manuever. This flexing produced a board with a
variable rocker; in a turn the board would aquire more rocker looseningg
up the board. My experience is with Mike's poly boards, two of which
he made for me back in 1988-89. These are a dream to sail in chopy
conditions. The Mistral board, however, was less than successful. They
produced a board that was far too heavy for its size (about 9 ft). The
board had removable tails ostensibility to provide the user options
for varying the flex of the tail. The mechanism used to make the tails
interchangeable resulted in a far too heavy board. While I have not
sailed one they quickly became novelties and I believe were only
produced for one season.

On the other hand, if you have the opportunity try one of Mike Tinkler's
custom flex tailed boards.

SES

 
 
 

What is flex tail?

Post by Paul Steinert /ADVISOR L » Thu, 15 Dec 1994 08:21:15

: >Someone refered to Mistral's flex tail a short time back. What is it?

: Mistral was promoting a board design that incorporated a flexible tail
: section. The amount of flexibility was varied by adjusting some
: compression spings situated in a gap between the bottom planing surface
: and the solid deck section above.
:  
:  Why not use the flexural modulus of flat plates?  Of fiberglass...
:  What range of flexiblity was needed I wonder?  You could even make
:  all the plates of the same thickness but vary stiffness by changing
:  the orientation of the fibers in a composite spring.  
:
:  How effective and popular was this variable stiffness board?
:  
:  Steinert
:

 
 
 

What is flex tail?

Post by Kirk Lindstr » Wed, 28 Dec 1994 23:23:54


Someone refered to Mistral's adjustable flex tail a short time back. What
is it?
----------

It is a board with the last 2 ft. or so on a hinge with two springs
near the rear footstrap.  Flat bottom and fairly hard rails at the
back for speed, but then when you jibe or turn in the waves/swell
the tail flexs to more better 'rocker" and you zip around and
can make a really nice turn.  Works well, but is heavy and expensive.
The boards are really fun for us heavy weights in Gorge type sailing.
I use a slotted wave fin in the GOrge and a "LD" blade in the SF Bay
with mine.  FIn selection seems pretty critical since too much fin
makes the board really squirley much like a course board yet it sail
like a wave board.....doesn't go upwind well unless powered.  I bought
mine at a close-out for $400 as my first shortboard (got a bigger one
pretty quick since this was too much a drop from my Malibu...) and it
was probably the best $400 I've spent on the sport.  Really having trouble
deciding what to replaace it with so I just keep sailing mine....

Kirk out
ASD epoxy: 8'8" RKT, 8'11" CS & 9'6" no-nose CS; Mistral CFlex and Malibu
Wt 213#, Ht.  6'0", Usually sail on SF Bay, Cailf.

 
 
 

What is flex tail?

Post by BILL1 » Tue, 03 Jan 1995 07:45:08

THERE ARE NEW DEVELOPMENTS COMING SOON INVOLVING EVOLUTION  OF THIS IDEA.
 
 
 

What is flex tail?

Post by Jez Barn » Sun, 15 Jan 1995 02:24:38


Quote:

> THERE ARE NEW DEVELOPMENTS COMING SOON INVOLVING EVOLUTION  OF THIS IDEA.

This is something developed by a UK co. called Vitamin Sea in the mid 80's.
It was crap. It still is crap. It is now being developed as a detachable weapon to cause
injury to jetskiers, (who are all mincing queens with no more right to
be on Gods clean earth than a weazel).

JB