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TSATS: semi-submersible


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#1 Zaiocrit

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Posted 13 March 2012 - 12:27 AM

I took inspiration from here : Heavy-lift Ship

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Unfortunately I could not get what i wanted, because the variation between the normal buoyancy and diving has always been minimal in the various tests that I did

The very satisfaction is that it floats with only Lego bricks!  :sweet:

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video


ciao
Andrea

#2 Alasdair Ryan

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Posted 13 March 2012 - 12:34 AM

Do you hope to make it sink and then raise like the real think?
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Updated 02/08/12
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#3 Zaiocrit

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Posted 13 March 2012 - 12:38 AM

if I can make it float ... i'm already happy  :laugh:
see also the desire is to move a few millimeters up and down .. 2 or 3 ? hehehe  :tongue:

is a hazard ... but I want to try

of course now I'm working on the waterline, the ship weighs 1 kg!

Edited by Zaiocrit, 13 March 2012 - 12:54 AM.


#4 DLuders

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Posted 13 March 2012 - 12:54 AM

You will need some water ballast that you can pump in and out.

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#5 Zaiocrit

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Posted 13 March 2012 - 12:58 AM

View PostDLuders, on 13 March 2012 - 12:54 AM, said:

You will need some water ballast that you can pump in and out.

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Indeed!

the pump is already mounted  :wink:

#6 timslegos

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Posted 13 March 2012 - 01:47 AM

Good luck at not ruining your motors!

tim

#7 VMLN8R

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Posted 13 March 2012 - 01:56 AM

Zaiocrit, you may find this video reassuring:



#8 peter_m

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Posted 13 March 2012 - 04:05 AM

View PostVMLN8R, on 13 March 2012 - 01:56 AM, said:

Zaiocrit, you may find this video reassuring:



Lego motors running under water?  *huh*

#9 KEvron

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Posted 13 March 2012 - 04:14 AM

"NXT-xans!" too clever by half!

KEvron

#10 Zaiocrit

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Posted 13 March 2012 - 02:02 PM

View PostVMLN8R, on 13 March 2012 - 01:56 AM, said:

Zaiocrit, you may find this video reassuring:



is the end that will do my ship?  :tongue:

Edited by Zaiocrit, 13 March 2012 - 02:03 PM.


#11 Zaiocrit

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Posted 17 March 2012 - 05:12 PM

OK !
floats!

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#12 Zaiocrit

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Posted 17 March 2012 - 10:35 PM

flotation tests



and now ... connect the hoses for the next step: to sink!  :grin:

#13 DLuders

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Posted 18 March 2012 - 12:22 AM

*oh2*   Posted Image

#14 timslegos

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Posted 18 March 2012 - 01:18 AM

wow i am surprised that it floats!  Are you going to make it able to sink?

tim

#15 Alasdair Ryan

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Posted 18 March 2012 - 02:00 AM

Making it sink is the easy bit,it's making it rise out the water that will be hard.:laugh:

Edited by Alasdair Ryan, 18 March 2012 - 02:01 AM.

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Updated 02/08/12
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#16 Zaiocrit

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Posted 18 March 2012 - 08:43 AM

set up a water pump and an air pump... both be connected to two tanks  :laugh:

#17 Zaiocrit

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Posted 18 March 2012 - 11:26 AM

View PostDLuders, on 18 March 2012 - 12:22 AM, said:

*oh2*   Posted Image

I have compensed this problem (evidenced by your animated gif) with this 2 pieces :

'Boat Weighted Keel 2 x 8 x 4 without Bottom Tab' (x149a)
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and 'Brick 2 x 6 x 2 Weight with Plate Bottom' (73090b)
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for a total of 0.102 Kg to 43cm of distance from the "cockpit"

View Posttimr, on 18 March 2012 - 01:18 AM, said:

wow i am surprised that it floats!  Are you going to make it able to sink?

tim

Yes !
I do not know how many mm will move
I have to make connections and have the time to take the test  :tongue:


View PostAlasdair Ryan, on 18 March 2012 - 02:00 AM, said:

Making it sink is the easy bit,it's making it rise out the water that will be hard.:laugh:

I have already taken the test to pump water and then air, and it worked ... pushes the air out of the water and vice versa .... Obviously the quantities are minimal
the ideal is to have more Tank

I must now consider whether to put the tanks in series, or independent of each other as designed at the beginning

This is the Hull of my ship  :tongue:
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#18 Zaiocrit

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Posted 18 March 2012 - 05:55 PM

updating

Unfortunately, the water entering the tank is not enough to "send off" the ship
The difference is micrometric
Floats too well!   :hmpf_bad:

there should be more tanks and a system to rotate them when they fill with water or air optimizing the load
but I have no other  :cry_sad:


I probably pointed too high for my chances
but let's see what I can do even

Edited by Zaiocrit, 18 March 2012 - 06:26 PM.


#19 Zaiocrit

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Posted 18 March 2012 - 06:34 PM

test of the pumps and air/water tank



#20 dfs473

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Posted 18 March 2012 - 06:38 PM

It`s really good^^

Edited by dfs473, 18 March 2012 - 06:38 PM.


#21 Zaiocrit

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Posted 18 March 2012 - 06:39 PM

View Postdfs473, on 18 March 2012 - 06:38 PM, said:

It`s really good^^

but does not work as I would like  :cry_sad:

#22 ciken

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Posted 18 March 2012 - 09:12 PM

more tanks

#23 Zaiocrit

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Posted 01 April 2012 - 07:27 PM

Unfortunately I could not get what I wanted
the variation between the normal buoyancy and diving has always been minimal in the various tests that I did

Unfortunately the limited time available did not allow me to make the last change that I have in mind

I close with these pictures for the moment the status of jobs ... followed by a video

satisfaction is cjhe floats only with Lego bricks!  :sweet:

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#24 Alasdair Ryan

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Posted 01 April 2012 - 07:47 PM

I look forward to the video.:sweet:
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Updated 02/08/12
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#25 timslegos

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Posted 01 April 2012 - 09:04 PM

i like the yellow and red color scheme.  What is the pump on the deck for?

tim




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