by Ianm » Sat Dec 21, 2013 10:00 pm
My wife and I circumnavigated in a Top Hat 1974 – 1977. We had no experience which prompted any concern about hull strength.
Our elder son, Jamie, did a world circumnavigation in a Baker Mk1, “Possibilities” 2000-2010. This included 3 Atlantic crossings.
Before he started on the circumnavigation, he tried to sail to New Caledonia. After a few days slamming to windward, the hull started to leak in the vicinity of the starboard stringer which supported the V berth. He sailed downwind to Lord Howe. The hull was cracked along the stringer. Someone on the island patched it up and he and his crew set off for Pittwater. The patch fell off two days out of Lord Howe and they pumped the rest of the way. In Pittwater, he got a shipwright to do a proper repair. I recall that the repair was 1.2m long. I have heard anecdotes of other Top Hats failing at the same location.
Jamie then spent a few days glassing in 50mm foam square stringers and frames at 500mm centres, from the keyhole hatch to the anchor locker bulkhead. He also layered more glass onto the hull between the foam.
He was t-boned by a fishing boat off Brazil. The bows of the fishing boat came in to the cabin side, the lower end of the gash was 100mm above the water line. Also off Brazil, a crew member hit a rock which made a small hole in the hull.
Jamie’s hull reinforcing may well have what kept the boat afloat.
On “Possibilities”, the cabin top has become quite weak. There are some areas that I have imagined sticking on “No Step” aircraft signs.
I inspected a few Top Hats when my younger son was searching for a boat. One of those was so lightly constructed that I could deform the hull outwards with my hand, below the waterline. I recall that it was a Mk2.
My tuppence worth:
Top Hats are old boats. The Mk 2 and Mk 3 seem to have been rather variable in quality. Fibreglass strength decreases over time, from many factors. In general, Top Hats will probably outlast most other small yachts of the same vintage. But they will not last for ever, and probably are becoming more fragile than their owners like to imagine.
On the bright side, adding some hull reinforcement from the inside is not a very big job, at least for those boats without an interior F/G liner. The strength of the reinforced hull could easily be made stronger than the original when new.
Ian