Corsair Marine F-31 Specifications download pdf (Page 9)

Check that the socket in the rotating mast foot aligns

correctly with the pivot ball on the deck, as the mast nears the

fully up position.

CAUTION

Winch operator should be careful to ensure that the

trailer winch line lays evenly across the drum

while

mast is being raised.

With an offset bow roller,

there

can be a tendency for the incoming line to pile up on

one side of the drum,

to where it can suddenly slip off.

Monitor the float shrouds with rotating masts on initial

rigging to ensure they do not become too tight or catch on

anything during raising. F-28 and F-31R (rotating masts)

have either special link plates or a Highfield lever system on

the float decks that allow the shroud enough slack for the

mast to be fully raised when the float is folded, while

preventing any danger of the mast toppling forward. The F-

24's special folding geometry allows this on its own.

These Link Plates are an important safeguard against

accidently dropping the mast while folding or unfolding, so do

not remove.

The F-31 mast is large and heavy, with high loads, and

extra caution should be taken to ensure it is not able to swing

too far sideways. Never park in a cross wind or sideways on

a slope, unless extra help is available to steady mast.

11. Once the mast is fully up, connect forestay. At initial

rigging mast rake should be set to around 3 to 4°, which is 1

to 2° more than the rake of the aft edge of the forward beams

when viewed from the side. Once initial adjustment has been

done, the forestay turnbuckle does not need to be undone

during normal rigging or de-rigging, only the clevis pin is

removed or inserted.

Lower and intermediate shrouds on the fixed F-31 mast

remain connected during all rigging and de-rigging

procedures. After the initial adjustment, there is also no

need to undo these or disconnect them from the shroud

chainplates.

12. Once forestay is connected, slacken off the trailer

winch, disconnect the jib halyard, and return it to the mast.

Remove raising pole, mast yoke, rewind the winch and

reconnect hook to the bow eye.

Leave mast raising wires attached to the mast, as

these are still required for support until after the floats are

unfolded and shrouds properly connected to floats.

13. The topping lift is now disconnected from the mast

lower end and connected to the end of the boom to help take

the weight. Remove the sail bag from the mainsail/boom and

connect the boom to the mast.

14. Tighten all the battens in the mainsail, if required.

Connect the mainsheet to the boom. Feed the mainsail head

into the track on the mast and connect the main halyard

Link plate system on the F-28. Pulling the lower left clevis

pin releases the shroud, but it remains secured to the float

by the link to the u-bolt to the right, while allowing just

enough slack for the float to fold (see page 24).

Always leave mast raising wires attached until after the boat

is unfolded. F-28 'fold down' anchoring loops shown here.

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Corsair Marine F-31 Specifications Page 9

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