Free design for amateur boatbuilders

Discussion in 'Boat Design' started by Alik, Jul 21, 2003.

  1. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    cx4dad:
    I was just sailing that area about six monts ago. The photo is of Isla de las Gaviotas. Windy and choppy most of the time
     
  2. carlos bairo
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    carlos bairo Junior Member

    ola gnzo;;i have send email to montevideo to in espanol to PEDRO with attachment fotos of one of my 21 fut alloy crusier build last yer.,this design
    is from BODEN BOATS australia end i made from scrap lofting take a lot of time
    but i am very please with the final product 25knots at 5000rev.135hp outboard.,i building a tug boat TITAN from GLEN L MAREINE & K ATKINSON alloy with full zize paterns plaiting at this moment best regards j c BAIRO
     
  3. cx4dad
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    cx4dad Junior Member

    Dear Carlos:
    very good your 21 feet and very nice also, well the designer of the Pilgrim 590 was Albert Nazarov ( Alik) senior member of this forum, I have done a little modification in the bow, my pilgrim is a 21 feet...
    Dear Gonzo:
    its ok, that´s Isla de las Gaviotas, near of Puerto de Buceo,and in spring and summer the Rio de la Plata is very chopy and windy, I think the most beautifull season for sail here is automme and the winter is the weather is fine too, but the water is very cold.
    At this moment the Solymareño has sailed about 900 nautical milles, in the Rio de la Plata.
     
  4. carlos bairo
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    carlos bairo Junior Member

    gonzo;;; i know the condicion at the rio de la plata ,i have working for 12 yers at talleres /varadero in the port administracion /a lot of time sailing and work with remolcadores (tug)boats .thats my trade /pressure vessels constrtion.,i will bring TITAN (tug)alloy vessel with my too on my return to URUGUAY duing the plaiting at the moment ., will send you potos very soon chers carlos
     
  5. antoine51
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    antoine51 Junior Member

    info

    please send me the specification in english
    thanks antoine
    kamelec@gmail.com
     
  6. carlos bairo
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    carlos bairo Junior Member

    info'''' i do not know the type of specifications that you refering
    i don't understand you cuestion
    carlos
     
  7. John FunBoat
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    John FunBoat New Member

  8. claudiu01
    Joined: Mar 2010
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    claudiu01 New Member

    Hy Alik

    I like your Kavalier 800 design and i want to build the boat but for that i was to the naval autority here in Romania and they want to ad at the project stability info like STIX (iso 12217-2), but i have problems calculeiting the area under GZ arms (AGZ)

    Can you help me whit that if you have time please please :confused:

    Thank`s
     
  9. Alik
    Joined: Jul 2003
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    Alik Senior Member

    You should build it, make inclination test and then produce stability curve based on actual CG. Having this curve, You can calculate STIX.

    This is the only way to go becasue amount of modifications and material changes is enormous for amateur-built boats.

    I wonder why they need STIX? Boats built by amateurs are not subject to CE certification...

    If You need to check area, just take any book on naval architecture or numerical methods, and study how integration works.
     
  10. magwas
    Joined: Oct 2009
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    Location: Hungary

    magwas Senior Member

    Above a size one have to register the boat. To register you need documentation on ship safety.

    I believe the regisration limit throughout EU is 6.2m LOA and 10m2 sail area. At least it is in Hungary.

    Claudiu I don't know the ukrainen or moldavian registration rules, you might get around the thing by first registering in another country then transfer the registration home.

    However I would not try to build a seagoing craft without design documentation containing stability calculations.
     
    Last edited: Jul 28, 2010
  11. Alik
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    Alik Senior Member

    Ok, then one needs to order the design (in some countries designer should have a license), then run design approval procedure, etc. The costs involved are probalby compartable with cost of construction... good bye, boatbuilding!

    I wonder if any design for amateur builders (free or purchased) is approved or contains stability diagrams and all other data for certification? I have never seen one...

    As to P590 and K800 designs, both of them were developed before ISO12217 was introduced; I am quite sure they will comply to category C, but there are no calculations performed to prove it.
     
  12. Alik
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    Alik Senior Member

    Attached Files:

  13. SAE140
    Joined: Apr 2010
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    SAE140 Junior Member

    Hello Alik - I've had a look at your 590 design - you clearly have good design skills. If you have a spare moment, could you take a look at: http://project-paltus.99k.org ?
    If you have any suggestions regarding design improvements, they would be appreciated. Text in English, original Russian text in the appendices. Many thanks.
     
  14. Alik
    Joined: Jul 2003
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    Alik Senior Member

    I know this design; nice boat.

    I never try to 'improve' designs developed by others, unless a) their authors ask for advice or b) there is a safety concern.

    Actually for modifications one needs to know how You want to use the boat.
     
    Last edited: Mar 28, 2011

  15. SAE140
    Joined: Apr 2010
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    Location: Boston, UK

    SAE140 Junior Member

    Hello Alik

    thanks for the reply

    The designers of the Drascombe Lugger and Paltus are both dead now, of course.

    The on-going issue with this design is the inboard rudder set-up, which requires the rudder to be lifted clear out of the water well before beaching, which means no steerage control at a fairly crucial time. Failure to do this can result in a bent rudder assembly as the kick-up is only partially effective - and this damage has indeed happened to several people. Safety issue ? Certainly can be, but more of a nuisance most of the time.

    But - I respect your views about tinkering with someone else's design.

    Regards,
     
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