The "rocker" in a mozzie has always been a mystery to me and likely to many others too I'd guess .... most I've asked about it have usually shrugged their shoulders and had that blank look...

Jurassic Karp 1740 (as stated from its previous owner) has minimal rocker in it which can make it a bit slow in light conditions, however with this comes extra stability and less drag at speed such that this is probably one of the outright fastest hulls around and as such is well suited to the spinnaker with this extra stability. In 12 kts + this boat is as fast as any of the newer boats depending upon the guy on the tiller.

That's all well and good on paper, but how do you check what rocker you actually have ???

I've just bought another mozzie, because I needed another headache and whilst it too will need some long overdue TLC, it will get on the water well before the Karp will... 2~3 weeks and we should be sailing it..... Karp is still 2~3 months away at a push....

so how do I check the rocker on the new toy ???

What do I look for .... measurements at a given point.... template comparisions ... or is this an experienced builder thing where you slip on the rubber glove and say relax and I'll see what you've got in there



Kingy

After much consideration; place the hull(s) on a flat surface/floor. Measure 613mm from the bow and trace a line down to the keel, 90 degrees to the sheer line. Mark that point on the keel. You now have two points on the keel that are the same on every legal mossie, the 613 point and the transom. 'Rock' the boat until the 613 mark and the transom are equal in vertical measurement from the floor. Record that measurement. Drop a plumb from the bow and transom. Measure and record where the keel is in contact with the floor, from bow and stern plumbs. You now have a maximum depth of rocker and where that maximum depth is along the keel. It can be used as a comparison with other like measured hulls. Would be interesting!
PP
1827
Ps: I guess you could use a string line as the flat surface but several steady hands would be required to stretch it and hold it steady. Therefore rocker could be measured with boat on trailer, if there is clear access along the keel. ??

The photographs of Aldebaran VI's construction (in photobucket) have all been labelled. It may help interested parties understand the internal structures of a timber mozzie. Happy viewing.

http://s840.photobucket.com/

Also some joyful memories of Aldebaran V. He's for sale!

http://www.theracingcat.com/index.php?page=boats-for-sale

I can't get the photobucket link to work. I have signed in to photobucket ... I keep just ending up at my PB home page ... any ideas?

It did not copy n paste correctly.

http://s840.photobucket.com/user/FibreW/library/?sort=9&page=1

Beautiful work Phillip

Aldebaran VI is up for a 'repaint'. Starts with hand sanding. Dry sand with 120 grit. Slow but ensures removal of the surface but not breaking through the epoxy. Do not want to create bare wood. Will have a few 'running' repairs to perfect when this first process is complete. (Have been using spray enamel on these repairs and this product will also need complete removal before respraying with 2 pack.) The 2 pack thinners finds the enamel very quickly, it dissolves it!

Sanded for 2 hours and all 4 bows sanded to the main beam. Rear half will be quicker as the curved sections are easier to sand. Then its onto finer grits, followed by wet sanding. Will finish with ~600 grit, then spraying.

Phil you rascal! Ha! I knew you'd been quiet! With a timber boat you get more than 1 hobby. Did A6 really need it or did you just get bored? Winter thing? By coincidence I am at a similar stage with mine! Cheers, Roy.

A6 has had a few repairs, mostly splits, that needed attention. Thought it prudent to repair these and then resurface the whole boat to maintain its 'French Polish' finish. LOL.



Quiet because I've been in Qld during August-September, twice. Also been waiting for Adelaide's weather to warm up so I can work in the carport (no shed like some other lucky owners).

Carbon Credit, Hamilton Island (before it 'lost' a bow)

Nice and shiny again. Spent a 'few' hours hand sanding, 120 dry, 240 dry, 400 wet. This also included repairs and epoxy on the bare spots. Leaving it for 3 days to fully harden.

Now to replace fittings and sailing gear. One week to season openings!

Still designing the long-awaited sign writing. Something distinctive, in red & black again. And to disguise the plain timber grain on the bow sections, see photo!

odd split

I take it only one of the veneers has separated (from the pic atleast)

I've only seen that sort of splitting in lower quality veneers and in ply that's been left directly in sunlight in the storage store...... Where I get my ply from they have a 6mm sheet that's "sacrificed" to protect the ply sheets underneath, its full of fracture splits like the one you've pictured, the pack is stored under a laserlite sheet in the roof and the sunlight hits the rack around 11:00am through to late arvo baking the ply sheets to destruction. I always pull half a dozen odd sheets off before taking 'my sheets'