FWB28 Trim

Guest
Guest's picture

Since I'm not sure our FWB-28 "Janner" has the correct hull-trim, and since I'm in the process of rearranging her movable ballast I would like to post the following question:
Could someone provide a means to measure the longitudional trim.
I'm thinking of the height of bow and stem above the waterline.

I want to avoid trying to balance "Janner's" trim by adjusting sailtrim when hulltrim is not right.

Our FWB "Janner" was (presumably) build in 1986 as an open racing boat.
I'm not sure if that was before or after the hull change in which G&L increased the freeboard with 4 inches.

Thanks in advance for your reply !

Maarten Adriaans
FWB-28 Janner
The Netherlands

Guest
Guest's picture

ah - they surely do vary in layout. We have no steps (well one, in which is a fridge), a very low cabin sole with no real room underneath (shame cos that'd be ideal for tanks...) and the batteries in the engine bay. But Molly wasn't fitted out by the yard, but by Robertson's so probably varies even more....

I think our ballast is encapsualted, but I'm not sure.

Hmm, think I'll try the bigger jib first.

Aeolus FWB28
Aeolus's picture
Joined: 26 Aug 2006

Yes Aeolus has a lead keel too. There are about a dozen of these trimming ingots scattered (!) around the boat. Some to provide lateral trim and some fore and aft. After the handover sail, Martin picked them up in his dainty hands and retrimmed the boat.

Brian Neale
Brian's picture
Joined: 03 Sep 2006

The ballast varies a bit from boat to boat (like just about every other feature!)

Not sure what Steve specified for Aeolus, but on Victoria Ruth I was given the option of steel punchings in resin for the main ballast, or lead, which cost a little bit more. I went for the lead which is encapsulated in resin and glassed over. Because it is a bit denser, it sits lower in the keel (better C of G position) and gives more space below the cabin sole so the water tank is fitted there - again, weight is lower and it gives more cockpit locker space. There are then a few ingots deep in the bilge under the engine, which is probably the same as Steve's movable "trimming" ballast.

Victoria Ruth has one floorboard which is not screwed down. It's about 4' long and runs from under the middle of the companionway steps, and can be lifted out without using any tools. This covers the two batteries which fit comfortably under the sole, and the rear of the water tank for access to fittings if needed.

Guest
Guest's picture

I have no idea if we have any large lumps of lead - unless they are under the floorboards (tricky to get out on Molly without taking out the very chunky table)

Aeolus FWB28
Aeolus's picture
Joined: 26 Aug 2006

My boat has movable trimming ballast in the form of lead ingots. They are very heavy, I can just manage to reposition them but Martin picks one up in each of his very large hands!

Guest
Guest's picture

hmm, not sure how to find her correct lines, must research. I had thought of shifing weight aft but not sure what I can do. Molly has her water tank in the forepeak - but I haven't noticed much difference with it full or empty. We have moved a spare anchor back to a cockpit locker, suppose it all helps.

Mast seems to go forward of dead-vertical already, so nothing doing there.

Maybe the rudder (a mahogany replacement) is warped - nothing obvious but maybe warrants a closer squint.

Aeolus FWB28
Aeolus's picture
Joined: 26 Aug 2006

Brian is right when he says that it depends upon the individual boat.
Martin likes to trim the boats aft since they get their bows down when underway. Aeolus is trimmed aft and is well balanced. I took photos of the actual as opposed to painted waterline and had it altered during the respray.

Guest
Guest's picture

Be interested myself on any hints on this one. 'Molly' has more weather helm than I'd like - most likely underpowered jib, but maybe hull trim would help..? Haven't spotted any mould line (bit will look next time we are out).

Brian Neale
Brian's picture
Joined: 03 Sep 2006

Maarten,

I'm surprised that you have not had an answer to this one, but it's probably for the same reason that I can't answer it - it all depends on the boat! Victoria Ruth has the waterline marked in the moulding (looks like a strip of tape on the surface of the mould when she was made) which is really useful when antifouling to give a definite edge for the masking tape. However, I'm not sure that the marks are at the same height on each side, judging from where the watermarks are at the end of the season! Fortunately, you cannot see both sides at the same time...


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