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Author Topic: its my EMMA..  (Read 1507 times)

Krishna

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its my EMMA..
« on: August 16, 2015, 06:58:23 AM »

Friends.. just built to place in my rail road lay out.. with lots of reworks.. the size of the containers are to match the lay out.. the ship is 36 inches long.. and i lost the build log as i formatted my camera.. its by expended polystyrene and foam board..
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Martin (Admin)

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Re: its my EMMA..
« Reply #1 on: August 16, 2015, 08:57:43 AM »


VERY impressive Krishna!   :o
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Krishna

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Re: its my EMMA..
« Reply #2 on: August 17, 2015, 04:41:13 AM »

Good morning.. thank you Martin sir..
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escipion

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Re: its my EMMA..
« Reply #3 on: August 14, 2017, 04:38:00 PM »

Wooow, very nice boat Krishna, congratulations   :-))
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Stavros

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Re: its my EMMA..
« Reply #4 on: August 14, 2017, 06:10:50 PM »

Would love to see some pics of your railroad keep up the good work


Dave
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roycv

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Re: its my EMMA..
« Reply #5 on: August 14, 2017, 06:30:23 PM »

Hello Krishna she looks good.  You need to ballast down a lot more, the bulb on the bow needs to be below the surface when running as otherwise it does not do its job (in a full size way).
Are you into N gauge railways?
regards Roy
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john44

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Re: its my EMMA..
« Reply #6 on: August 14, 2017, 06:49:40 PM »

Excellent model as usual, very clean lines,well done Krishna. :-))
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BFSMP

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Re: its my EMMA..
« Reply #7 on: August 17, 2017, 10:04:33 PM »


Hello Krishna she looks good.  You need to ballast down a lot more, the bulb on the bow needs to be below the surface when running as otherwise it does not do its job (in a full size way).
Are you into N gauge railways?
regards Roy


roy, I have always wondered, and wonder more now that more and more ships are being built with them..........what effects does a bulbous bow have on the sailing and running of a ship.


and finally, 20 years or so ago there was a narrow boat built and displayed all over the narrow boat world, and it had diesel electric power AND  a bulbous bow...what would this have been all about.....   


https://www.google.co.uk/search?q=narrow+boat+with+bulbous+bow&tbm=isch&imgil=Gdtu9DeKpZHkNM%253A%253BXMJDrmJL69GX9M%253Bhttps%25253A%25252F%25252Fwww.pinterest.com%25252Fpin%25252F541487555180317120%25252F&source=iu&pf=m&fir=Gdtu9DeKpZHkNM%253A%252CXMJDrmJL69GX9M%252C_&usg=__hWiOSD8ermfyUPzFhvBf680aaeA%3D&biw=1280&bih=643&dpr=1.5&ved=0ahUKEwiLisbmlN_VAhXqJcAKHUh9DlIQyjcIMQ&ei=4wOWWcuMDOrLgAbI-rmQBQ#imgrc=Gdtu9DeKpZHkNM:


Jim.
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roycv

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Re: its my EMMA..
« Reply #8 on: August 18, 2017, 09:13:10 AM »

Hi Jim, hope this is an answer for you, quite happy to have any other comments.
When a ship goes through the water it creates a wave as the water is moved out of the way and there is drag on the hull.  Making waves absorbs energy from the engines pushing the ship along.  Bigger waves, then less power available from the engines so speed is slightly reduced.
The bulb below the waterline is calculated to create a wave of its own that tries to counteract the wave from the hull, it sort of smooths it out.
The shape of the bulb will be 'tuned' to have the best effect at the cruising speed of the boat.
In essence it reduces the bow wave and subsequent waves created by the passage of the ship, this releases more power for the boat to go faster or using less power for the same speed.
hope that helps,
Roy
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BFSMP

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Re: its my EMMA..
« Reply #9 on: August 18, 2017, 04:28:04 PM »


thanks for that Roy. I appreciate it. I often wondered why these "bulbs" were also many different shapes, and your explanation has also answered that question too.


many thanks. you are not to old to learn something new.


Jim.
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ballastanksian

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Re: its my EMMA..
« Reply #10 on: August 18, 2017, 07:24:11 PM »

Great to see you about again Krishna! That's a lovely ship you have built.
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dougal99

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Re: its my EMMA..
« Reply #11 on: August 19, 2017, 09:12:50 PM »

Krishna's last post was 2 years ago August 2015.
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Krishna

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Re: its my EMMA..
« Reply #12 on: September 14, 2017, 10:38:25 AM »

Good after noon all my friends.. i am on my new modeling workes.. will be back in my creative modeling soon..
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Big Ada

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Re: its my EMMA..
« Reply #13 on: September 14, 2017, 05:14:44 PM »

Good after noon all my friends.. i am on my new modeling workes.. will be back in my creative modeling soon..

Great News.

Len.
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