Contact info: Catmando2, Dave ?

Discussion in 'Multihulls' started by Sinclair D-R, Oct 29, 2009.

  1. Sinclair D-R
    Joined: Oct 2009
    Posts: 50
    Likes: 1, Points: 0, Legacy Rep: 32
    Location: Nicaragua

    Sinclair D-R Junior Member

    Managua, 29.10.09.

    Greetings to all,

    How can i contact Dave, builder/owner of Catmando 2?
    As i share a similar passage maker power cat concept and size in mind.

    Thanks for your help!
    Safe winds.
    Sinclair

    * Jeff: My first disappeared, with your anwer i never could read.
     
  2. catmando2
    Joined: Sep 2006
    Posts: 167
    Likes: 4, Points: 0, Legacy Rep: 38
    Location: Australia

    catmando2 Malaysia bound....soon

    Send a PM
     
  3. Sinclair D-R
    Joined: Oct 2009
    Posts: 50
    Likes: 1, Points: 0, Legacy Rep: 32
    Location: Nicaragua

    Sinclair D-R Junior Member

    Passage maker power cat 15.00

    Managua, 29.10.09.

    Greetings Dave,



    Here are some of the specs for my to build Passage maker power cat 15.00

    - LOA: 15.00

    - LWL: 14.00

    - BOA: 5.60

    - D/L: 13/1

    - Draft: 1.00 max.

    - Wing clearance: > .90 @ lowest

    - Power: 2x50 shp swinging a 600 mm 2 blade prop

    - 2000 nm @ 10 kt +, loaded, 10 % reserve, heavy seas, strong wind, genset fuel burn, all included.

    - Top speed: ~ 16 kt

    - Cruise fast : 14 kt

    - Range: 10 kt

    - Displacement hull, raised pilot house.

    - Accommodations: basically 15.00 hulls with the short bridge deck/accommodations of a 12.50 on top, utilitarian amenities for two

    This boat optimized for about 12 kt.

    Could you share your thoughts, thank you for your time Dave.
    Who has a close design? Robin Chamberlin?

    Safe winds.
    Sinclair

    You mentionned Jeff using same old tec building method as yours or Robin, would like to contact him.



    Sinclair Dubier-Routier
    Telefax: + 505 2265 7204
    Cel.: + 505 8823 8943
    Km. 12, Carr. Sur, 100 mts. al Sur Ex Embajada de Alemana,
    Managua, Nicaragua C.A.
     
  4. catmando2
    Joined: Sep 2006
    Posts: 167
    Likes: 4, Points: 0, Legacy Rep: 38
    Location: Australia

    catmando2 Malaysia bound....soon

  5. Sinclair D-R
    Joined: Oct 2009
    Posts: 50
    Likes: 1, Points: 0, Legacy Rep: 32
    Location: Nicaragua

    Sinclair D-R Junior Member

    Dave,

    It seems i did not express my self clearly, you misunderstood me:
    Firstly, I am looking for a disigner to draw her under the above specs, then a builder to give here life.
    Any idea?

    Sprint speed: rather slower than heavier.

    Safe winds.
    Sinclair
     
  6. catmando2
    Joined: Sep 2006
    Posts: 167
    Likes: 4, Points: 0, Legacy Rep: 38
    Location: Australia

    catmando2 Malaysia bound....soon

    Robin could be one to speak to, he designed the cat in this picture, though I think it has 100+ hp per side
    [​IMG]


    as would Bob Oram who has done these with 50hp/side in sail, getting 10/12 from a 3 bladed folder
    http://boboramdesign.wordpress.com/60-halcyon/
    [​IMG]

    I think getting what you are asking for, 16 knots, with 50HP x 2 while using a 2 bladed prop may be a bit optimistic.

    If it was very skinny, very light and minimalistic swinging a 3 or 4 blader it could well be achievable in the right conditions.
     
  7. Sinclair D-R
    Joined: Oct 2009
    Posts: 50
    Likes: 1, Points: 0, Legacy Rep: 32
    Location: Nicaragua

    Sinclair D-R Junior Member

    Dave,

    Catherine & John B. comissioned Foriegn Affair in 2002, i would vewry much like to contact them.
    Sewnt mail to Robin and Jeff who built variuos 13.5 Chamberlin power cat, will keep you posted.

    By the way i should thank Rick Willoughby who kindly offering me to crunch some of my numbers -for free- who also provided me with quoted sketckes and finally recommended me to get in touch with Robin Chamberlin as his power cat are close to my concept.
    Thank you again Rick.

    Bob Oram and i are in contact, i told him that his hands-on approach is refreshing and reassuring given his vast experience.

    Sprint speed: around 16 Kt, well: rather lighther than faster, within reasonable limits.

    Talking about numbers,
    LOA has to be 50' minus one inch as marinas overcharge you above 50' LOA, Not that i intend to hang my hat in one.
    BOA: Asked Leo Lazauskas about the criteria i should elicit to determine the most efficient beam after reading his 1988 paper as i did not find a satisfying answer, but he is to busy nowdays to work for free, understandble, Rick's Godzilla programm came with one figure.
    Weight, LWL, and range speed are the three factors to take in consideration/
    Any opinion, any ratio? else? Dave.

    Props: ready to learn plenty, please!
    Thought about starting a thread on thsi subject: Beam for long range power cat.
    Thanks for your time.
    Sinclair
     
  8. catmando2
    Joined: Sep 2006
    Posts: 167
    Likes: 4, Points: 0, Legacy Rep: 38
    Location: Australia

    catmando2 Malaysia bound....soon

    Not sure if I understand this, are you saying you would rather a lighter boat that kept 50hpx2 even if speed was 10knots
    Compared to a 16 knot boat that needs 100hpx2 to get it?


    Not really, just keeping it simple and doing what has worked relatively well before.

    Dont know enough to knowledgeably comment and rely on the prop guys for recommendations.
    For mine they recommended an 18 inch 4 blader or a 19 inch 3 blader (or the other way around)
    No mention of a 2 blader so I assume they are not efficient enough.
     
  9. masalai
    Joined: Oct 2007
    Posts: 6,824
    Likes: 119, Points: 0, Legacy Rep: 1882
    Location: cruising, Australia

    masalai masalai

    In my gallery is a couple of images of the Chamberlin 10 (10 metres=32.8ft) that had twin 50hp with a max of 16knots - I doubt the ability to get same top speed out of 50 ft and range (3tonnes of fuel?) - "Foreign Affair" could achieve 1.3litres/NMi (from a failing memory) and top speed around 20Knots but good sized engines...

    I responded to an email from Rick Willoughby today, give him time, he may find a link... The 'Icecat' website is closed.
     
  10. Guest625101138

    Guest625101138 Previous Member

    Sinclair
    As far as the beam that GODZILLA came up with it should be subjected to a sensitivity analysis. I doubt the hull drag will be a compelling factor in what works out best. A few values over the likely range should be compared.

    As far as props go you go for the largest diameter you can reasonably fit and protect. From there you go to the lowest BAR consistent with strength and cavitation limits.

    If you look at the Wageningen data you will find a 2-bladed props with 20% BAR achieves best efficiency of 90%. You will not get to this with your current loadings but it shows what can be achieved with light loading.

    I think once you start talking to designers they may be able to get the weight down from what you have in mind as I gauge you are not after a floating palace but rather a competent sea boat for small number of people.
     
  11. Sinclair D-R
    Joined: Oct 2009
    Posts: 50
    Likes: 1, Points: 0, Legacy Rep: 32
    Location: Nicaragua

    Sinclair D-R Junior Member

    Managua, 31.10.09.
    Quite a lot of rain recently, everything is lushly green around!

    Dave,
    - Propulsion:
    Weight being such a drag and given the choice i would rather have a slower than heavier boat. 50 rated -crank- shaft hp. should do.
    Which

    - Beam:
    Still in the mist!

    - Props:
    Same as above

    -Props:
     
  12. Sinclair D-R
    Joined: Oct 2009
    Posts: 50
    Likes: 1, Points: 0, Legacy Rep: 32
    Location: Nicaragua

    Sinclair D-R Junior Member

  13. Sinclair D-R
    Joined: Oct 2009
    Posts: 50
    Likes: 1, Points: 0, Legacy Rep: 32
    Location: Nicaragua

    Sinclair D-R Junior Member

    Masalai,

    Chamberlin 10 m Sea trial, Rick gave me this link:
    http://catchcryhamm.com/?q=node/19
    Sent the Hammonds a mail a couple days ago.

    Foreign Affairs:
    Nice efficient boat,
    http://thecoastalpassage.com/papers/tcp30.pdf
    Page 12.
    "73 hours for the 816nm" Wonder how much engines fuel the Brosnans burned.
    Which make, model, etc.

    Whish you plenty of NRG for your beautiful cat coming to life.
    Sinclair
     
  14. Sinclair D-R
    Joined: Oct 2009
    Posts: 50
    Likes: 1, Points: 0, Legacy Rep: 32
    Location: Nicaragua

    Sinclair D-R Junior Member


  15. catmando2
    Joined: Sep 2006
    Posts: 167
    Likes: 4, Points: 0, Legacy Rep: 38
    Location: Australia

    catmando2 Malaysia bound....soon

Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.