: OK so I finished up my first pair of hatch flanges (I really don't
: know what to call the glassed channel, so flange it is).

: I might do them again (how nice to be doing a job on the boat that
: can easily be done again if you screw up). They came out ok, but
: I wasn't careful enough to avoid air bubbles, so some of the
: channel has air bubbles along it.

: They also weighed in around 250g each (half a pound), after
: trimming. Which seems a bit overkill to me. I laid on about 7
: layers of 6oz cloth per Vaclav's instructions and they certainly
: are extremely strong. I haven't got any carbon fibre and for
: reasons of finance I'd prefer to use up some of the huge
: quantity of scrap fibreglass I have built up.

: What sort of weight is reasonable using fibreglass? Reckon I'd be
: ok with say 5 layers of cloth? I think with that and more
: prudent use of resin maybe I could get them down to 150-200g
: each? (roughly 6-8oz)

: Thanks, Ian

I've never weighed mine. They do though have to be fairly strong, unless you're using magnets to hold them down, they have to constantly resist whatever method is holding the hatches on, if not pretty strong they'll deflect over time and will leak.

Bill H.