Friday, October 31, 2014

Winches

It is now time to turn this boat into a real sail boat.

Placing the winch posed a new issue. as usual when a new step arrives, new questions and doubt arise.
The is not much experienced people around well informed on aluminium construction.

Here the question again was sealing the through deck holes and galvanic insulation.
It was complicated by the fact that the winches mechanism are in bronze.  Bronze should be very carefully isolated from aluminum. The external body is aluminium that poses no problems except for the two motorized winches near the mast.

So agin the choice was: Urethane for sealant, Duralac on bolts, and teflon to insulate different metals.

More attention had to be given to the positioning of the winch gear an respect of the 8 deg angle of attack for ropes.

Despite the fact that we did all the calculations when preparing the position of winches, placing of reinforcement plate, and drilling of holes some corrections where necessary.



This is an aluminium frame winch






And this is a bronze one.





Power winch





Without forgetting the proper orientation. Some will fit in different orientations.




And in the case of the mainsail winch we had wrong holes!



Final Check simulating the genoa sheets







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