Vertical clearance

[Ru88ell]

On the Cape Cutter website, on the 'design' page, it says that the 'Vertical Clearance Air is Mast Up: 2.6m / Mast Down 1.5m.

What, exactly, does this mean? How can it be 2.6m mast up?

[Dennis]

Hello Ru88ell

You are correct, it is obviously a typo. I reckon the 2.6 m should probably be approx. 7.2 m to the top of the mast.

The mast is about the same length as the boat hull (5.8 m) as it was designed to fit inside a 20 ft container for shipping purposes. However, the gaff peak rises about one metre above the top of the mast, this must give an "air draught" of about 8 m under full sail.

The other area of possible error in the "Design Specifications" is with the stated weights. They may be optimistic, one or two owners have had their boat/trailer on a weighbridge and have found them to be heavier than specified.

Cheers

Dennis

CC19 #100 Mary Ann

[oak]

The SA brochure states "vertical Clearance air ":Mast up,6.8m ,mast down:1.5m
I was going down the Shannon and no one could even tell me the clearance available at the electricity cables strung across the river!
Shouldn't be to difficult to measure if one is worried

[Ru88ell]

The website still hasn't been corrected, so I'll go with Dennis's 8m to be safe.

[erbster]

I would guess that 2.6m is in fact 26feet, which is 7.9m.

Where are you thinking of?

Has anyone been on the Broads- could a CC get under the bridges (mast down)?

[Dennis]

Seeing as the boat is still on my drive, I will get the tape measure out and measure from the top of the tabernacle to the (light) waterline.

Will report back.

[Ru88ell]

Seeing as the boat is still on my drive, I will get the tape measure out and measure from the top of the tabernacle to the (light) waterline.

Will report back.

Thanks. Can you also do from the top bolt hole in the mast to the top of the mast while you're at it?

[Dennis]

I had already anticipted that, with you in mind.

Yes no probs.

Mast is hanging in the garage (horizontally).

Plus I will measure from top of tabernacle to ground (on HM trailer).

Should be able to get a definitive set of dimensions.

Probably will not be able to do it until Thursday though, SWMBO has got me booked for a shopping jaunt to Carlisle tomorrow.

[Dennis]

Hello all.

Just been to boat armed with long straight edge (3m of Douglas Fir) and a 30m tape.

I rested the straight edge on top of tabernacle and took measurements vertically on both sides of boat. In fact the measurements were the same both sides. Here they are:

Distance from top edge of tabernacle to waterline is 1.41m.

Distance from top edge of tabernacle to ground (on HM trailer) is 2.23m.

Distance from top edge of tabernacle to mast mounting hole is 0.03m.

Distance from mast mounting hole to top of mast dolly is 5.42m.

Therefore mast up air draft is 5.42 + 1.41 - 0.03 = 6.8m.

You need to add any nav.lights or VHF aerial dimensions to this, or the gaff, if you have full mainsail up.

Hope this helps.

[popeye]

.... or the gaff, if you have full mainsail up.

Hi,

if the gaff is up and under full main you have to add 0.7m.
I`ve checked this by fixing a thin rope to the gaff peak and to load the other end by a heavy bolt. After raising the full main I marked the area where the rope comes out of the water. Then I took a tape measure to measure the hole length and the result was 7.4m.

Regards from Bavaria

Frank