Coramandle newbie

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  • 31 Jul 2023 19:04
    Reply # 13234634 on 13233765

    Definitely a standard shaft then, as will use the well. 

  • 31 Jul 2023 19:00
    Reply # 13234630 on 13233765

    The attached photo shows Emmelène's 5hp long shaft outboard. The waterline is in line with the previous owner's middle finger. It seems a bit overlong. I'd be interested to know if any Coromandel sailors have any experience of using a standard shaft outboard. Would it break the surface, or choke on its own exhaust fumes?

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  • 31 Jul 2023 18:55
    Reply # 13234625 on 13233765

    In the standard engine location I had good results with a standard shaft length.

    Should you choose to move the outboard to the stern of the boat, you will need a long shaft engine - ultra long if at all possible.

    Best regards,

    Antoine

  • 31 Jul 2023 18:31
    Reply # 13234597 on 13233765

    Thanks for all your replies, and the advice.

    one question, is a long shaft outboard best vs standard shaft?. Was going to get a 6 hp

  • 31 Jul 2023 18:07
    Reply # 13234583 on 13233765

    That sail looks very elegant! 

    I think it does not address the luffing tendencies of the Coromandel and in all honesty from what I hear I think that so far only Emmele's sail addresses that issue well.  Emmelene's skipper is an accomplished mariner whoes reports and input should be taken seriously.

    Maybe we should try to make available  a predictably well functioning SJR sail design and a well working sail design according to Arne's line of sail development. If it were up to me we would add a well-balanced flat-cut sail to that portfolio as well.

    Additionally a number of measures to turn any Coromandel into a well performing forgiving sailboat would be great - think additional rudder surface, working selfsteering, protected cuddy design.

    Where everyone can pick and choose, improve and share after their heart's delight.

    Best regards,

    Antoine

  • 31 Jul 2023 14:30
    Reply # 13234448 on 13233765

    Hi Dick

    I have a 1983 Coromandel (note correct spelling!) called Yellow Rock, that has been in storage for the best part of 16 years, 9 years from 2008 with the previous owner, bought by me in 2014 and again kept under cover until a couple of weeks ago, when I antifouled her and put her in the water. Now in the process of restoring the rig to working order. The reason I'm telling you this is that the whole rig was replaced in 1999 by Sunbird Marine under the designation 'Sunbird 90's rig'. This rig was based on a design called the 'Fenix rig', developed by the late Wing Commander R.L. 'Bunny' Smith after several years of expeimentation and refinement of the junk rig using mostly his Sadler 26 Fenix. As I am one personal witness after a lively sail with Bunny, it was significantly faster than with the standard Hasler-McLeod-based rig which was fitted to your and my Coromandel. The main differences are in the batten angles, sheeting and luff-control systems which are designed to allow the sail to take on a more powerful shape on the wind. Most of this extra power in this design is developed by the top panel which, being close to the mast, may have a lesser effect on the tendency of the extra power to create the weather helm reported by others who have used more power by adapting the whole sail construction. The sail on my Coromandel is ,I believe, actually the same sail area as the original. Anyway, if you're interested, I have most of the details of the 'Fenix' version of the Coromandel rig on file. I note that your yard has disintegrated; the one on my boat is alloy, the sail being fitted in a groove similarly to the usual way sails are fitted to a boom, whereas the battens are of flexible plastic pipe to allow increased shape in the sail; they are lighter and slimmer than the original wooden battens. I will attach a couple of photos, but hope to have better ones once the boat is sailing again. If you can make it to South Brittany (near Arzal on the Vilaine River), I would be delighted to take you for a sail later in the season when I have got to grips with Yellow Rock. Good luck with your Coromandel, they are great little boats with a much better cockpit and interior accomodation than the Corribee which shares the same hull. Welcome to the JRA!

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  • 31 Jul 2023 13:32
    Reply # 13234424 on 13233858
    Anonymous wrote

    yeah I would be interested in the Hebridean, how come you’re selling it?

    I've found the Hebridean holds a good, steady course and may be left mounted on the stern instead of stowed below. This proved impractical during my recent inland waters cruise in the Netherlands, so it occupied the whole of the Cook's berth while I was cruising solo, even broken down into its separate components. It may better suit a bigger boat.

    I plan to build a more compact self steering gear, and Emmelène is so easy on the helm that I'll try a wind vane linked directly to the tiller, without the added complications of a servo pendulum.

  • 30 Jul 2023 18:32
    Reply # 13234145 on 13233765

    Hello Dick,

    i think your sail looks very similar to ours. Mai Poy has a Sunbird-rig with hinged battens. The battens end-cabs, the lack of batten parrells and the plastictubes on the portside seem to be the same. The batten under the yard in your picture seems to be to far forward. I‘ll add some pictures of our sail. What was said about the wetherhelm is sadly the truth, we have to fight with it too and I‘m thinking about to add a rudder plate. We are at the time on our fifth 2-month journey (Adriatic from Italy to south Croatia, two times Ionnian Sea and now for the second time in the Netherlands), we are definitive no hardcore sailors (at 6 Bft we prefer to stay in harbour, 5 Bft we only go out if we will sail off the wind ;-)) but we had accidentally strong winds and survived well reefed, we had no damage at our sail until now. The plastic-tubes hold the sail near the alloy-tubes, they have to be flexible and there is only less power to them. If I would go for a new sail, I would chose Arne‘s Style, I like the appearance more than the effective Split Junk Rig.


    Michael

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    Last modified: 30 Jul 2023 18:35 | Anonymous member
  • 29 Jul 2023 22:50
    Reply # 13233952 on 13233765

    In the standard layout the outboard is in a well with the propeller next to the rudder . A bigger rudder might interfere with the propeller in this standard setup - see drawing below on Arne's input.

    I moved the outboard tc the he stern on an outboard mount and gained manoeuvrability and lots of storage space ( Brompton, dinghy, flotation etc. ). You will need a  long  or extra long shaft - tohatsu 6 sailpower for instance - I use a 1986 mariner 2 stroke 4hp long shaft which sometimes cavitates in bigger waves or when working the foredeck.

    Drawback: you will lose the location for your Hebredian or similar. Other options are available (OGT-ii) and you might not even need the pendulum - vane to tiller might sufficee. So far I only used sheet to tiller selfsteering with good results upwind.

    Adding camber and sail area to the sail will turn your boat from a docile little motorsailor into a lively little sailboat. Arne now suggests battens of 3,60 meter - mine are somewhat over 4 meters.

    The standard sail hardly ever needed reefing, My current setup ( split junk rig , 5 panels, ~20m², 25% balance) requires reefing by a force 4 and I very often sail with 4 of the 5 available panels using the 5th panel in lighter winds. I recently spend a  day with 3 panels upwind on tidal waters in a force 5-6. The camber will make your sailing experience noisier - 6 panels would have been better. Downwind I often reef to 3 panels as she develops a rolling motion with more panels up. Reducing sail downwind does not  sacrifice much speed. 

    Arne's input is very useful for a non-sjr take on a better performing Coromandel and merits close attention. 

    Arne: a query:

    How much would you add to the rudder if you had your way?

    Beste groet,

    Antoine



    Last modified: 30 Jul 2023 09:19 | Anonymous member
  • 29 Jul 2023 18:35
    Reply # 13233864 on 13233765
    Anonymous member (Administrator)

    Ooops,.

    I couldn’t resist the temptation of drawing up an alternative JR for that Coromandel. Hopefully the mast’s position and mast length is the same as found in Sailboatdata. As can be seen, the sail has moved quite a bit forward, and there is still room for moving the CE another 100-150mm forward.
    That rudder is terribly small. I don’t understand how Newbridge got away with it. They must have received quite a few complaints. My first remedy would be to add a largish end plate to it.

    The sail I have drawn is actually a down-scaled version of the sail driving Ketil Greve’s Kelt 8.50. See recent appendix to my write-up Junk Rig for Beginners ( http://goo.gl/vzGLzi ).

    Cheers,
    Arne

    (Arne's sketches section 7, photo 26)

    Last modified: 29 Jul 2023 18:44 | Anonymous member (Administrator)
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