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Copyright © 2014 by Corsair Marine International
COLLISION
Any boat that has a significant fore and aft collision on the float bow, or the folded
beams have hit a low bridge, should always be thoroughly checked. No boat can be
made collision proof, and hidden damage can result.
The complete float should always be checked after an impact, not just the bow area. A
heavy fore and aft collision can actually propagate throughout the float, and has even
generated cracks around the aft deck inspection hatch flanges for instance. In one case,
a float hull had a vertical fracture in the aft beam area from a severe bow collision.
(Support for maintenance. When necessary, the craft can be supported for short periods as
detailed above for anti-fouling or other maintenance work.)
The beams should also be carefully checked if they have received any significant sharp
impact. Being carbon fiber, they can be cracked or damaged from sharp impacts, and
areas to check are around the lower folding strut brackets, and just inboard from the
float. Even if no damage is found, continue to monitor for cracks over a period of time.
The diagonal wire braces as used on the Cruze 970 and C37 tend to direct shock loads
into the forward beam structure in this area. Any cracks in this flange should be
investigated and repaired.
The forward beam bulkhead to hull join tape just adjacent to this flange area on the 31
should also be investigated closely, as this is a known failure point from such collision.
Damage here may not be visible initially, but it may grow to eventually fail later, so
continue to monitor. The boat still holds together should this tape delaminate, but
obviously sailing should cease until it is repaired.
HURRICANE SURVIVAL
Hurricanes frequently cause damage too many boats, and on one occasion capsized a
folded F-27. The owner had left it on a mooring and being worried about possible
damage from other boats breaking their moorings nearby felt it best to fold her up to
reduces the ‘target’ profile. However this considerably reduces stability, and as stated
earlier, this is limited while folded. As a result, no doubt while swinging sideways, the
gale force winds blew the F-27 on its side.
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