Corsair Marine F-31 Spezifikationen PDF herunterladen (Seite 33)

sion loads in this area to be directed through the Upper

Folding Struts, which, in the case of the F-24 and F-31 are not

strong enough for such loads. They are designed for folding

loads only, and the end mounting points may fail.

Beam

Compression Pad must fill this gap

Hull

Upper Folding Strut

This would not cause a serious beam problem as the

beams then simply move inboard to bear against the hull

again. The boat is not threatened structurally. However,

repairing an U.F.S. mounting point is difficult and expensive.

The plastic compression pads should be full width of the

beam and bear evenly against both beam and hull, to avoid

any point loading. This should be checked periodically.

The F-28 has similar pads on the forward beams, but

these are not structurally important, their only purpose being

to eliminate any movement for better rig stiffness.

WINGNETS

Take care that you do not step near the inner ends

of the nets on the sides where lashing cannot be used in

order to allow easy folding. Your foot may go through this

gap. This area can be lashed if you wish, but should you

forget to undo when folding, the eyelets in the nets will be

pulled out.

BIMINI TOP STORAGE

A bimini top can be very useful, due to its ability to shade

the cockpit. For storage, it can be hung over the stern and

tied to the pushpit.

FLOAT/BEAM VENTS

The floats are vented through micro cowl vents fitted to

the float transoms (or spring loaded vents just aft of the

forward beams on earlier models). These are to prevent a

build up of air pressure inside the floats on hot days, that

could be enough to open up the hull to deck join.

The watertight bulkheads at the forward beam and Shroud

chainplate bulkheads thus have very small holes near the

top to allow venting throughout the float. Should the float ever

be holed then these should be well above the flooded

waterline, or at worst, only allow a very small amount of water

through.

Should the float be inverted as in a capsize, then the

airlock formed above these vents would prevent any signifi-

cant flooding.

Hollow beams such as used on the F-28 also need

draining/venting, and this is done through tubes extending

from the bottom of the beams inside the floats. Should water

appear from these then the source of the leak in the beams

should be investigated, and repaired.

In the case of capsize, these tubes are designed to extend

centerline until the water flow reattaches, or slow down.

To avoid, always keep the leading edge of your rudder

smooth and fair, and if it becomes a consistent problem then

the best cure is to fix a horizontal 'fence' to the leading edge

of the rudder about 12 to 15" up from the bottom.

Fence

This will prevent the air from travelling down the blade

and retains steering control, even if the top part of the rudder

has ventilated. Such fences are fitted as standard on some

higher performance models.

SHROUD TENSIONERS

When leaving the boat for any length of time with floats

extended, the shroud tensioners on the F-31 should be let

off. If not, the high tension could slowly bend the boat, due to

'creep' characteristics. This rule applies to all boats with

adjustable backstays.

When initially setting up, shrouds with such tensioners

must be adjusted to be just long enough to reach chainplate.

There will then only be a small deflection when the tension-

ers are applied. Avoid the shrouds being too long as the

resulting large deflection will put too much load on the

tensioners, and this could put the mast at risk.

RIGHT

WRONG

Too much load on

tensioner - could slip

or fail causing loss of

mast

Too much

deflection,

tighten shroud

turnbuckle

Shroud

turnbuckle

adjusted for

minimum

deflection

Low load on

tensioner

When sailing offshore, or for long periods, it is best and

safest to fully tension the cap shrouds with the turnbuckles,

so there is no reliance on the tensioners.

COMPRESSION PADS

These are fitted to the ends of F-24 and F-31 beams, to

eliminate any gap or movement between the beam ends and

the raised pads in the hull.

Do not remove, as this would cause the high compres-

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