Note: Descriptions are shown in the official language in which they were submitted.
11'~2'7~39
This invention relates to a sailboard which consists
of a stagless rig and a board body which is provided on its
underside with drift-resisting means.
The previously known sailboards have different designs
selected in accordance with the intended use of the sailboard.
For instance, sailboards for surfrising are relatively short
and have a wide, raised prow. Their underside is flat. Such
sailboard cannot well be used for sailsurfing on smooth water,
particularly when the wlnd is light or gentle and has a strength
below No. 4 on the Beaufort scale.
On the other hand, sailboards for use on inland waters,
particularly in light or gentle winds, should be relatively
long and their submerged portion should constitute a so-called
displacement body.
For these reasons, a plurality of sailboards must be
available to a sailsurfer who intends to use his sailboard on
open waters and inland waters. This requirement is not desirable,
for several obvious reasons.
The object underlying a prior application of the same
inventor (German Offenlegungsschrift 27 53 Q31 published
31st May 1979) was to provide a sailboard which has universal
usefulness. For this purpose it was proposed to provide a com-
posite board body and to adjustably connect the fore or aft
section to the adjoining section so that the fore or aft section
can be used in at least two
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positions.
~ .xperiment3 have shown that such a sail-
board i9 more,~ersatile -than the conventional sailboards
but in various cases will not possess -the optimum
sailing proper-ties of a specicll sai,lboard~
~ or t~is reason i-t is an object of the
invention to provide a sailboard which has universal
us,efulness and has optimum sailing properties in each
case.
In a sailboard having a board body which
has the minimum leng-th and a l`lat underside having
good sliding properties, this is accomplished in
that a sole member is provided, which positively
interengages wi-th the underside o~ the body cmd is
detachably connected to the latter and has suitably
a convey underside. The body without the sole member
constitutes a base board which can be descrîbed as
an ideal sliding body. The assembly consisting of
the body and a suitable sole member has such proper-
ties that it can be described as an ideal displacement
body.
~ ithin the scope of the invention7 a plurality
of sole members having differen-t submerged por-tions
may be associated with a single board body. Such a vari-
able sailboard will constitute optimum equipment
for a sailsurfer. The novel sail'board having a sole
member repl~aces at least two conventional sailboards
-md can be made at lower cost than such two sailboards.
It can also 'be more easily transported and requires a
smaller space in s-torage~
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799
'~ilithin the scope of the i.nvention, the
sole member may have the same length as -the board.
body. In dependence on -the requirements, the sole
mem'ber may ex-tend. beyond the fore and/or aft end of the
board body. Alterna-tively1 the sole member may extend
at one end beyond the fore or aft end of the board
body whereas the other end of the sole member is dis-
posed bet~een the fore and aft ends of -the boards
body.
It has been found desirable to provide
the sole member at the top with a recess for receiving
at leas-t part of the board body.
In order to minimize the time required
for an alteration Or -the sailboard, the sole member
is suitably provided with vertical through openings
for receiving the dri:~-t-resisting means provided on
the board 'body. For the same reason, -the sole member
may be connected to the board body at one end by
hooking means. ~hat hooked end is suitably the fore
end.
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As has been stated hereinbefore, the
underside of the sole member is suitably convex. If
-the sole mem'ber extends beyond the aft end. of the
board body, the sole member may be narrower than -the
board bodyO
An illustrative embodiment of the invention
will now be described more in detail with reference
-to the accompanying drawings, in which
Figure 1 is a side elevation showing a
board body,
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Z~99
L1`igure 2 is also a side elevation showing
a sole m mber for the bo~-lrd body of 'Figure 1,
~ I'igure ~ is a top n'l~n -view showing the
board 'body bvhich has beon joined to the sole member,
L~'igure 4 ;s a transverse sec-tional view
taken on line IV-IV in Figure 3, and
L~iy;ure 5 is a side elevation showing the
aft portion of the as<-,embly of l?igure 3 on a la:rger
scaleO
,r,l sailboard consists of the board body 1
shown in Figure 1 and a stagless rig, ~,vi)ich is not
shown because it is conven-tional. The board body carries
drift-resistin~ means consisting of a center board 2
and a fin 3. ~he board body has onl,y the minimum length
required and its underside is flat (see also Figure 4)
so that it is well sui-ted for surfriding and for sailing
at high wind velocities which result in a ruffled sur-
face of the water or in waves.
In accordance with the invention the board
body 1 is p,rovided with a sole member 4 (see particularly
~'igure 2), which has been applied to the underside of
the ~oard body and positively interengages -therewith.
As is shown in Figure 4, the underside of -the sole
member is convexO By -the provision of such sole member,
the properties oE -the board body 1 are so changed that
it is transformed from a sliding body to a displacement
body. ~'he resulting sailboard is desirable for use on
3o inland waters and can 'be used par-ticularly at low wind
veloci-ties.
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7~:~9
In the embodimellt which has been selected
by way of example, the sole member 4 extends somewh;~t
beyond th-, fore and a:~-t ends of the 'board body lo The
longi-tudlnal side edge portio]ls 5, 6 o r -the sole
member ~lre :raicied (see p~-~.rt,icul~l.rly Fi.gure 4) so that
the sole memher `has a recess .L`or receiving the boa:rd
'hod~ 1. .!~t the :rore end, that recess is wi.dened to
fo-rm a pocket 7, which se:rves to recei.ve i,he fo:re end
of the boclrd body 1 and pe:L~c;its a simple plug connectionO
The aft portion o r the s~le 4 iS raised so as~to be
flush with the board body (see Figure 5~. Two tog~-,le
joint tightners are provided for connecting the board
bocly at i-ts'aft end to the sole member. The hook 8 of
each tightener is secured to the aft end of the board
body 1. The tightener lever 9 provided with the pivoted
loop 10 is pivoted to the opposite portion of the sole
member. To permit the use of a sole m.ember which is
thin and light in weight, stiffening :ribs l-l, 12 are
provided in this embodimentO
In the embodiment ~hown, the sole member
is provided at its af-t end with a fin 13. The shape
of the through opening 14 provided in the sole member
4 (Figure 2) for the fin 3 o:f'-the board body 1 will
depend orl the nature of tha-t fin 3. The sole member
4 is also provicled with a through opening 15 for -the
center board 2 (Figure 5).
