Thanks for everyone's input - it is really appreciated. No the 14m was not a typo. My boat is the famous racing
cat Commodore Explorer. She was left abandoned in Sweden
for 7 years stripped of all parts
except engines. Over the past 2 summers I built some beams and a jury rig and built an anchoring system as well as install a whole host of other stuff in order to sail her to Portugal
where she is now waiting to come out of the water
so I can convert her into a fast cruising catamaran
. The 12m jury rig which worked quite well downwind, we achieved speeds of 13 knots in a gale from Dover to Weymouth.
Unfortunately we broke the 12m rig near Belle Isle and what followed were 3 more jury rigs using what was left of the initial rig from Belle Isle to Nazare Portugal
. She now has a new record
- 4 jury rigs in 1 trip
I built an SS anchor cradle
that sat on the longeuron just behind the front beam and I bought 2 x 11m lengths of 25mm multiplait nylon for the snubber bridle with eyes spliced in each end and they are shackled to the front beam mount points.
In benign conditions I shortened the 11m to about 6m using a sheepshank knot
and deployed a 35kg bruce with 35-40m of chain on the snubber. In fresher conditions I deployed a 75kg bruce on the shortened bridle. In strong conditions I let out the sheepshank knots to lengthen the bridle and deployed 50m of chain on the snubber. I mostly anchored in 5m and no more than 10m of water. These lengths and weights were all guesswork on my part with a bit of prior reading for guidance.
It seemed to me that the yawing increased a lot with the longer bridle so I was wondering what bridle lengths other cat users deploy. With the 6m length the snubber is on the chain just below the water just forward of the boat and was very comfortable at anchor, albiet in benign conditions. Near Cap Finisterre we were anchored in strong winds, with 50m of chain and 11m bridle. No waves to speak of but the boat was dancing around like rudolph valentino. I have dagger boards
and with the dagger boards
down the effect of the wind
taking the high bow downwind is worse as it pivots on the daggerboards
The serial drogue
info is very interesting and I think it raises the point that in very strong winds I should consider anchoring from the stern - especially if there are no big waves. Any cat owner here with experience of anchoring from the stern ?