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23/07/03 14:51:33

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Subject: TS 240 Keel ram fixing - Warning! Author: Paul [ Next Thread | Previous Thread | Next Message | Previous Message ] Date Posted: 1/09/06 12:28:38 Hi all, The saga continues! Removed ram mounting bracket which was notionally attached to a carbon steel plate encapsulated in GRP to the rear face of the keel housing. Found a vertical tear in the GRP about 8mm wide, ovalled holes in GRP which had slotted into crack. Ram bracket pulled off with 3 studs with including the outboard half nuts 'holding' the ram bracket. Was able to remove one half of the carbon steel plate through the split and discovered that what at first impressions was a vertical split in the plate on centre line of studs was actually two pieces of plate. On the removed piece all surfaces corroded and outer face had layers of what looked like mill scale. No evidence of any bonding at all on any surface. MORE IMPORTANTLY THE TWO ABUTTING PLATE HALVES HAD TAPPED HOLES CENTERED ON THE VERTICAL JOINT LINE. THIS IS THE WORST 'COWBOY' CONSTRUCTION I CAN IMAGINE! It would appear that the TWO pieces of carbon steel plate were butted together and glassed in probably without any pre bonding to the keel housing. The whole was allowed to cure AND THEN THE THREE HOLES WERE DRILLED AND TAPPED ON THE JOINT LINE!!!!! The studs plain studs were inserted using screwdriver slots which as tightened would tend to lift the plate. Half nuts were fitted to retain the bracket and allow clearance for the ram body on its pivot bolt. I cant prove this was the original construction but if it was ( and it certainly looks likely) it would be advisable for you all to check your boat for signs of a problem. I am having a new st steel plate made with the studs welded in. Will cut out the old encapsulation and remaining half plate, clean up, abrade and bond the new plate to the keel housing before encapsulating. John at C B Marine at Chi Marina who is making the new plate identified my 'mill scale' as a separate piece of (est )2mm carbon steel to make the 10mm carbon plate up to 12mm!!! Sorry if this is alarmist but it could help you from having no keel lift capability. Paul [ Next Thread | Previous Thread | Next Message | Previous Message ]

Replies:

Subject Author Date Re: TS 240 Keel ram fixing - Warning! Alan Lambton 1/09/06 22:35:48 Re: TS 240 Keel ram fixing - Warning! -- Paul, 3/09/06 14:26:08 Re: TS 240 Keel ram fixing - Warning! -- Alan Lambton, 8/09/06 15:02:50 Re: TS 240 Keel ram fixing - Warning! -- Paul, 8/09/06 17:32:01