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#266536 - 10/28/13 02:34 PM Re: Aldebaran 6 (sail# TBA) [Re: Phillip]  
Joined: Apr 2013
Posts: 858
Pirate Offline
old hand
Pirate  Offline
old hand

Joined: Apr 2013
Posts: 858
Victoria Australia
Originally Posted by Phillip
..... Rocker can be as much or as little as you like/design into the hull(within the restrictions).....


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... confused

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 crazy 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

shocked

wink Kingy


Yar, & this ere post be done without a sin'le drop o' rum passin' me lips

Kingy
started with Impara Cadet #3 / Mosquito #245
& now Mosquitos #1182 & #1740

-- Have You Seen This? --
#267219 - 11/22/13 05:22 AM Re: Aldebaran 6 (sail# TBA) [Re: Phillip]  
Joined: Oct 2010
Posts: 92
Phillip Offline
journeyman
Phillip  Offline
journeyman

Joined: Oct 2010
Posts: 92
South Oz
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. ??

Last edited by Phillip; 11/22/13 05:33 AM.

Tortured ply is clearly beautiful.
Mozzie Aldebaran VI
1827
#275009 - 08/27/14 07:45 AM Re: Aldebaran 6 (sail# TBA) [Re: Phillip]  
Joined: Oct 2010
Posts: 92
Phillip Offline
journeyman
Phillip  Offline
journeyman

Joined: Oct 2010
Posts: 92
South Oz
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

Last edited by Phillip; 08/27/14 07:49 AM.

Tortured ply is clearly beautiful.
Mozzie Aldebaran VI
1827
#275037 - 08/28/14 02:31 AM Re: Aldebaran 6 (sail# TBA) [Re: Phillip]  
Joined: Apr 2009
Posts: 88
Matthew Dawson Offline
journeyman
Matthew Dawson  Offline
journeyman

Joined: Apr 2009
Posts: 88
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?


Cobra 570
Cobra 581
Mosquito 126
Arafura Cadet 738
#275038 - 08/28/14 04:36 AM Re: Aldebaran 6 (sail# TBA) [Re: Phillip]  
Joined: Oct 2010
Posts: 92
Phillip Offline
journeyman
Phillip  Offline
journeyman

Joined: Oct 2010
Posts: 92
South Oz


Tortured ply is clearly beautiful.
Mozzie Aldebaran VI
1827
#275039 - 08/28/14 05:17 AM Re: Aldebaran 6 (sail# TBA) [Re: Phillip]  
Joined: Apr 2009
Posts: 88
Matthew Dawson Offline
journeyman
Matthew Dawson  Offline
journeyman

Joined: Apr 2009
Posts: 88
Beautiful work Phillip


Cobra 570
Cobra 581
Mosquito 126
Arafura Cadet 738
#280515 - 09/14/15 01:53 AM Re: Aldebaran 6 (sail# TBA) [Re: Phillip]  
Joined: Oct 2010
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Phillip Offline
journeyman
Phillip  Offline
journeyman

Joined: Oct 2010
Posts: 92
South Oz
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!
[Linked Image]
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.

Last edited by Phillip; 09/14/15 01:56 AM.

Tortured ply is clearly beautiful.
Mozzie Aldebaran VI
1827
#280519 - 09/14/15 06:06 AM Re: Aldebaran 6 (sail# TBA) [Re: Phillip]  
Joined: Nov 2007
Posts: 73
Rebel without a Clew Offline
journeyman
Rebel without a Clew  Offline
journeyman

Joined: Nov 2007
Posts: 73
McLaren Vale, SA
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.

#280530 - 09/15/15 06:38 AM Re: Aldebaran 6 (sail# TBA) [Re: Phillip]  
Joined: Oct 2010
Posts: 92
Phillip Offline
journeyman
Phillip  Offline
journeyman

Joined: Oct 2010
Posts: 92
South Oz
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.
[Linked Image]

[Linked Image]
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).
[Linked Image]
Carbon Credit, Hamilton Island (before it 'lost' a bow)


Tortured ply is clearly beautiful.
Mozzie Aldebaran VI
1827
#280632 - 09/27/15 10:34 PM Re: Aldebaran 6 (sail# TBA) [Re: Phillip]  
Joined: Oct 2010
Posts: 92
Phillip Offline
journeyman
Phillip  Offline
journeyman

Joined: Oct 2010
Posts: 92
South Oz
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.
[Linked Image]
Now to replace fittings and sailing gear. One week to season openings!
[Linked Image]
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!


Tortured ply is clearly beautiful.
Mozzie Aldebaran VI
1827
#280634 - 09/28/15 02:40 AM Re: Aldebaran 6 (sail# TBA) [Re: Phillip]  
Joined: Apr 2013
Posts: 858
Pirate Offline
old hand
Pirate  Offline
old hand

Joined: Apr 2013
Posts: 858
Victoria Australia
Originally Posted by Phillip
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.
[Linked Image]



odd split eek

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'

wink


Yar, & this ere post be done without a sin'le drop o' rum passin' me lips

Kingy
started with Impara Cadet #3 / Mosquito #245
& now Mosquitos #1182 & #1740

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