New Member ,Tonic 23

[mark54]

hello

I am new to this forum, renew Tonic 23 with centerboard.

He is already 32 years old 
I need information about the distance from the stern, the trailing edge of the ballast should be fitted.

And at what distance from the stern is the rotation axis of the plate.

Can anyone help me.
MM

[rene460]

Hi Mark, welcome to the forum, you will find lots of good information and friendly like minded sailors here.

I don’t have specific information on the tonic centre board system, but if you type Tonic into the search box at the top of the forum, it will bring up a number of posts on that model.  Some of these include links to get a copy of the manual, and one of the posts mentions the centreboard drawings in particular.

I suggest the first thing is to chase down a copy of the manual, it may answer your questions, at least in part.

rene460

[mark54]

Thank you rene, I have these drawings, but they are not accurate enough to properly install the ballast.

The local seller informed me that Jeanneau would not give me such instructions because they had such rules.
He proposed to buy a new ballast but this does not solve the problem because my Tonic had finkil before.
I found ballast on the secondary market but without a drilled axle.
So I am looking for a Tonic owner who could measure these two dimensions on your yacht.

[MalcolmP]

Hi Mark

Might be worth asking on the French language Tonic Facebook group too


www.facebook.com/groups/704824916632490

[rene460]

Hi Mark, if I understand correctly, you have a tonic 23 that was originally fitted with a fixed keel and are converting it to the lift keel style.

That would certainly require the accurate dimensions you are requesting.  It is quite a challenging project.

I assume that by “ballast” you mean an external stub keel which also houses the centre board.  This is very similar to the arrangement on my SO30i, so some of the associated systems may be helpful, but certainly the location of the external keel and the centreboard pin are specific to the model, so I cannot help there.

I do hope that one of the Tonic 23 owners on the forum does come in with some information for you, either here or on the Facebook forum.  It’s an interesting project and I hope you will stay in touch and tell us about your progress as you go.

rene460

[mark54]

Yes you are right. Balast is a Polish name for external stub keel

The purchase of a new device is not possible due to the cost of transport to Poland.

Jeanneu shared some drawings with me (https://photos.app.goo.gl/F1cGpRY6JB2wTjX67).

However, I do need the dimensions A, B, C, D.

I especially care about the dimensions C and A.

My daughter volunteered for the group Malcolm wrote about but we don't have any answers yet.

On the feacebook I found the owner of Tonica 23 from France who wants to help me, unfortunately the boat is in the water and it will be lifting it in 2-3 months.

Maybe there is someone from a closed group in this forum who could ask a question on my behalf.

Thank you for your interest in my problem.

[apollo]

Hi Mark, I have a Tonic with center board. I can help you. But need to go to the dock first.
However, the distance C is from back of the keel to the swivel, 127 cm. And 25 from the Bottom.

[MalcolmP]

Dec 7, 2020 19:00:50 GMT mark54 said:

I found ballast on the secondary market but without a drilled axle.

Hi Mark

Glad that Apollo has now given you some dimensions. Is the second hand ballast you have found the complete stub keel plus the centreboard plate? I hadn't fully appreciated you were switching keels until I just saw you photos. These are very helpful. I hope you don't mind but I have added then to the Tonic Photos here: goo.gl/photos/FXxk4BG71zMdRRRK6  as they are bound to be of value to other Tonic owners in the future.  Hopefully you will be able to get useful information from the Tonic owner in France as well as the French Tonic Facebook group. Do keep us informed of your progress.

Malcolm

[mark54]

Hurray !!!
Thank you Apollo for the dimensions.
I thought I would have to 3D scan the hull of the yacht and then design a new keel.

If you can measure the C and E dimensions, you'll save me a lot of work.

Malcolm
The second hand keel was too small for its proper weight.
The photos in the folder are public so you can share them.
I am committed to posting the reconstruction report.

In the past, I have built 3 small yachts (5.5-7.6 m) from scratch, so I hope to be able to successfully complete the renovation despite my age.

Sorry for my google-english

[apollo]

I believe I've got them all:

A= 207 cm

B = 168 cm

C = 127 cm

D = 35 cm

Also added distance from stern (while I was at the spot) 272 cm and

already posted distance from bottom to swivel point = 27 cm

And to be complete: the thickness or witdh of the keel was app. 18 cm at the level of the swivel point (few cm more at the front end and minimal (1-2 cm) at the back off course

Please be aware that the front end of the keel is rounded, so the measures where not exact, +/- 5 cm for the A & B distances.

I realise it leaves you with a uncertainty of the "slope" of the front end of the keel. But I guess that will not make too much difference in the end

[MalcolmP]

Not that it has much detail, but for information I have just uploaded an English version of the Tonic 23 Owners manual


www.jeanneau-owners.com/technicalmanuals.html

[apollo]

Thanks MalcolmP,

This is useful when ordering spares (if they're still out there)

[mark54]

Apollo you don't even know how grateful I am.
These dimensions allow for the correct construction of the device.
You saved me a lot of work.