Re: TS 240 Hydraulics / Antifouling -- The Trapper Owners Association Archive Forum

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Subject: Re: TS 240 Hydraulics / Antifouling

Author:
Godfrey Whitehouse

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Date Posted: 20/11/05 22:56:20
In reply to: Alan Lambton 's message, "Re: TS 240 Hydraulics / Antifouling" on 12/11/05 10:06:52

Hello all.

Barnacles also seem to like Exe estuary mud. Delighted at the thought of the chilli powder - does the antifoul look like chilli con copper? Anyone know the amount of chilli to be added to a litre of antifoul to get the flavour right?

I would be happy to email photos of the Dutton Lainson worm drive winch installation to anyone who is interested.

I use the autohelm while raising the keel as the winch is in the cabin.

One disadvantage of the hydraulics was that there was very little clearance between the tiller and the top of the engine and I could not pump the keel up when the autohelm was on. In order to use the pump, I needed to be able to lift the tiller up subtantially above the horizontal with one hand while pumping with the other hand.

We used to have frequent oil leaks resulting in oil getting everywhere. We also frequently ran out of oil resulting in not being able to raise the keel fully. I was concerned about the complexity of the hydraulic system with consequent risk of failure. For example, what would happen if the hose failed suddenly. I was also concerned about the high stresses on the boat with the cylinder pulling more than twice the weight of the keel.

Our winch system is the ultimate in simplicity and ease of use. A child (well, a reasonably robust child) can raise and lower the keel as no great strength is needed to operate the winch. The keel does have to be wound down as well as up, however I regard this as a safety feature as there is no chance of winch brakes failing or the winch getting out of control. There are very few moving parts and everything is visible, reducing the potential for unpleasant surprises. There is no way I would go back to hydraulics.

Alan - I used the lighter duty 1500lb winch with a single block attached to the top of the keel. I used 6mm plaited dyneema cable which has a breaking strain of about 3 tons. Joe Jackson used the heavier duty 2000lb winch with a direct flexible steel cable to the top of the keel. I think with hindsight that the best installation would be the heavier duty winch with the dyneema direct to the top of the keel. You should note that the winch rating reduces as you wind layers of cable onto the drum and you have to be careful not to exceed the rating, hence the choice of the 2000lb winch.

We have been getting involved in quite a bit of racing here. Paradoxically, our deep keel is not a handicap, and is sometimes an advantage as we call for water on other boats long before they are expecting it!

Best wishes

Godfrey

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Replies:

Subject	Author	Date
Re: TS 240 Hydraulics / Antifouling	Alan Lambton	22/11/05 0:03:10