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BERGSTEAD KIWI – 1:35 scale

Home Forums Research Engineering BERGSTEAD KIWI – 1:35 scale

This topic contains 171 replies, has 16 voices, and was last updated by Avatar of elspru elspru 2 years, 4 months ago.

Viewing 15 posts - 1 through 15 (of 172 total)
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  • #1625
    Avatar of shredder7753
    shredder7753
    Participant

    It is about that time again. A lot was learned from building the first model, and i have made many changes to the design already. I have also bought more materials from Depot to to build another form.

    Stay posted for all the action!

    *Update – fast forward to page 6 for the actual construction. It took awhile to initialize the project.

    Stats:
    20m X 20m
    2550 sq ft interior living space – NOT including the garage or mechanical room.
    4,010 sq ft patio area
    Garage holds practically any 40 ft offshore powerboat, AND 4 jet ski’s.
    Ballast area holds something like 2800 cu m of h2o.
    Pendulum is made of 500 cu m of concrete. Prob cheap shitty ass concrete.
    All greenery on top deck is plastic.
    #15375
    Avatar of Capt.Sean
    Capt.Sean
    Participant

    Man that looks great your last one came out great so cant wait to see all the pics and info

    #15383
    Avatar of elspru
    elspru
    Participant

    hey awesome, once you have it made, can raft them together, modular-island style.

    calm aware desire choice love express intuit move

    #15400
    Avatar of OCEANOPOLIS
    OCEANOPOLIS
    Participant

    Water density is 1000 kg/ sq.m = 1 ton/sq.m. You gonna ballast the structures with 2800 tons of water,….per your specs. That’s A LOT of ballast! More then half of your structure displacement will be “wasted” as ballast tank(s). That’s a lot of wasted space man. Your are looking at a total of 2800 sq.m (3 decks basically = 20mx20mx7m = 60′x60′x21′) that you builded to be flooded instead of using it for living space, storage, etc.

    Also, in order to handle pumping 2800 tons of water in and out of your bilge you need heavy duty pumps, a huge battery bank and a big generator to recharge the batteries, and big fuel tanks. All this equipment will take a bite of your living space big time. If you also add space needed for provisions storage, spare parts, tools, holding tank, etc, you should be happy if you are left with 1800 sq.ft of total, actual living space + under the sun.

    Since you are going to spend 95% of your time @ the surface, to me, having more than 50% of you space onboard allocated for 5% use in terms of time is a very poor space management planning. Not only that, but your operational expenses will skyrocket since you are cutting off into your self-sufficiency big time. If the 2800 sq.m are to be used for provision and fuel storage instead of ballast you can maybe be self sufficient for around 1 year. The way you set it up for now you are looking at maybe 2 month. It translates in 6 more trips to shore, back and forth to supply per year. That will burn you extra cash, depending how far from shore you are moored.

    #15408
    Avatar of shredder7753
    shredder7753
    Participant

    hahaha!

    Ocean ur killin me. “that huge ballast area is only good 5% of the time”. thats as funny as it gets man. okay, u build a different design thats not safe in a bad storm. i welcome u to put it next to mine because once that 5% situation occurs I have a funny feeling theres gonna be a knock on my hatch. remember, going by the rules of the game, if ur seastead has to be taken to shore at random unexpected times, it is not a seastead.

    ____________

    My Work II

    “Leadership and do-ership are not the same thing”

    #15415
    Avatar of Mad-Dog-Tannen
    Mad-Dog-Tannen
    Participant

    How about this.

    Lets start trying to think of ways to actively use the balast area during non-submerged times so that it is “less wasteful” as it were. I completely agree with the idea that for a seastead to be successful it must fully utilize space to its upmost ability, so lets think of other ways to utilize the balast area as well.

    I’ll post my ideas when I’m less completely trashed. (Im on leave, I’m allowed to be shit-faced)

    #15435
    Avatar of OCEANOPOLIS
    OCEANOPOLIS
    Participant

    You provided the specs and I did comment, according to my experience. You do have a 60′ x 60′ x 21′ (20m x 20m x 7m) ballast cubic space. That is HUGE and IT IS more than 50% of your displacement according to your specs. To me, after 25 years of sailing around and having owned 15 boats IT IS A WASTE of space. That oppinion is not going to change and any sailor or naval architect is going to tell you the same thing.

    Hey, you can take them to the water but you cannot make them drink.

    Nobody’s going to knock on your hatch, lol. Trust me. In the storm that you will be riding, the seastead I designed will not be in a storm, but 500 nm away in shelter waters because it’s mobile. And trust me when I say to you that from a category 1 huricane and up, http://en.wikipedia.org/wiki/Saffir%E2%80%93Simpson_Hurricane_Scale, the bergstead will be toasted, no matter how many anchors you have down there, no matter how solid off a mooring you think you have, no matter if submerged or floating. It is a fact of life. Storms are to be avoided at all cost, in my book.

    As I said before, you do as you wish. You don’t have to belive me if you don’t feel like,…

    #15436

    Ocean, i would consider that shreds bergstead can survive even a hurricane . The structure looks solid enough to take the impact of a wave crest.

    Most modern ships have incedible thin the steelplating and are built close to the structural limits to safe costs –

    Shredders berg looks like a structure that has a good amount of structural reserve and i would not expect major damage from a wave going over the top of the structure. This is more than most of the structures that are currently out at sea can offer.

    Wil

    concretesubmarine.com

    #15437
    Avatar of shredder7753
    shredder7753
    Participant

    is he pulling my leg or did i just get actual encouragement from Navtec, Inc?

    Ocean i cant wait to bullshit w you over a beer. too bad Emmett and Ellmer wont be able to join us. i have very little engineering qualification, and less experience as a boat pilot. Everything i say is gonna sound like complete gibberish, lol! remind me to tell u about the time we had a little boat near the Chesapeake and got completely lost back when i was a teenager.

    Emmett – inside of a ballast tank? dude ur really drunk man, i can tell. if this idea works out – full credit to u. where do we start?

    side note. since im leaving for Fla on tues i decided not to do much with this model till i get back on the 20th.

    ____________

    My Work II

    “Leadership and do-ership are not the same thing”

    #15438
    Avatar of Mad-Dog-Tannen
    Mad-Dog-Tannen
    Participant

    I agree. I also cannot find anything suggesting that storms significantly change subsurface currents in such a drastic manner as to dislodge the moorings of the bergstead once it submerges to avoid an oncoming storm. Even the largest hurricanes, from what I’ve been reading, have little effect on even local currents, and certainly not enough of an effect to rupture a solid mooring.

    Now, I may just not be reading the right things – I have literally zero knowledge on this topic other than what Ive read in the last few days – so if Im wrong, please direct me towards reading that will show otherwise.

    #15439
    Avatar of shredder7753
    shredder7753
    Participant

    well there is one problem i had with the first model that keeps me from being able to test it for strength underwater. otherwise i would be testing out the limitations in scale size. i havent found a way yet to make the lid sealable for a reasonable price.

    once i get that situated i can try stuff.

    ____________

    My Work II

    “Leadership and do-ership are not the same thing”

    #15443
    Avatar of shredder7753
    shredder7753
    Participant

    15m equivalent

    ____________

    My Work II

    “Leadership and do-ership are not the same thing”

    #15447
    Avatar of Mad-Dog-Tannen
    Mad-Dog-Tannen
    Participant

    To seal the lid: a tube of silicone. You will have to put on a new seal every time you want to test it, but a tube should be good for 2 or 3 tests, and they are only a couple bucks.

    #15452
    Avatar of OCEANOPOLIS
    OCEANOPOLIS
    Participant
    #15458
    Avatar of shredder7753
    shredder7753
    Participant

    big problem. talking about the seafoor, im having trouble with my pendulum and keeping it off the seafloor. you might think that no seastead could accidently graze the bottom because it has too much height, right? wrong. my idea was to make it a bed and breakfast off the coast of Ocean City MD, 12-15 miles offshore. well the height of the berg, currently, is 21m from the patio level to the tip of the pyramid weight. then you would also want at least a few meters below the surface, right? so lets say we need 25m or 80 ft depth. then you need to monitor the dive depth so you need to have a range of, say, 5m up or down? you need to be in water that’s at least 100ft deep to operate a bergstead properly during a major storm. according to Google Earth, if u put your cursor over the water it gives you “altitude” of -70 feet in that area. i never saw that one coming.

    you dont get 100ft depth until about 20 miles out. if thats the case, shuttling these bed and breakfast patrons to and from the shore is gettin really expensive and time consuming. even if u cater to the high dollar crowd and transport them at 100mph, your still looking at 25mins in each direction. ugh!

    ____________

    My Work II

    “Leadership and do-ership are not the same thing”

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