Model Boat Mayhem

Mess Deck: General Section => Chit-Chat => Topic started by: Brian60 on February 15, 2015, 03:48:10 pm

Title: Spot the mistake anyone???
Post by: Brian60 on February 15, 2015, 03:48:10 pm
Anyone see the mistake on this photo?
Title: Re: Spot the mistake anyone???
Post by: Jerry C on February 15, 2015, 03:51:47 pm
Ah so, the old chinese amp thruster?
Jerry.
Title: Re: Spot the mistake anyone???
Post by: Martin [Admin] on February 15, 2015, 03:55:02 pm
 
Sans one Thruster?
Title: Re: Spot the mistake anyone???
Post by: Brian60 on February 15, 2015, 04:01:56 pm
These impromptu quizzes don't last long around here do they {-)
Title: Re: Spot the mistake anyone???
Post by: McGherkin on February 15, 2015, 04:43:18 pm
Retractable Azimuthing?
Title: Re: Spot the mistake anyone???
Post by: Brian60 on February 15, 2015, 06:00:53 pm
Sorry Mcgherkin. The specs say two bow tunnel thrusters. The GA plans even show two tunnel thrusters, seems the chinese yard may have decided to save some cash {-)
Title: Re: Spot the mistake anyone???
Post by: McGherkin on February 15, 2015, 06:05:43 pm
So it's a bit of a HMS Ocean then!
Title: Re: Spot the mistake anyone???
Post by: Peter_s on February 15, 2015, 07:15:47 pm
The name as well as torpedo tubes?! :} {-)
Title: Re: Spot the mistake anyone???
Post by: RAAArtyGunner on February 15, 2015, 08:32:06 pm
Sorry Mcgherkin. The specs say two bow tunnel thrusters. The GA plans even show two tunnel thrusters, seems the Chinese yard may have decided to save some cash {-)

 :o :o :o Its there covered by a self sealing door  O0 O0
or maybe only one but double signage so you would heed the message O0 O0 O0
Title: Re: Spot the mistake anyone???
Post by: slug on February 16, 2015, 12:18:52 am
it also has bilge keels.....tony
Title: Re: Spot the mistake anyone???
Post by: Umi_Ryuzuki on February 16, 2015, 06:54:06 am
Retractable Azimuthing?
O0

Posh Venture and Posh Vantage
http://www.posh.com.sg/pdf/ahts/9.POSH-Venture_HighRes.pdf (http://www.posh.com.sg/pdf/ahts/9.POSH-Venture_HighRes.pdf)
Title: Re: Spot the mistake anyone???
Post by: Netleyned on February 16, 2015, 07:53:31 am
Mcgerkin 1
Mayhem 0
 :embarrassed: :embarrassed: :embarrassed: :embarrassed: :embarrassed:

Ned

Title: Re: Spot the mistake anyone???
Post by: Arrow5 on February 16, 2015, 08:44:35 am
So what was the correct answer Brian ?
Title: Re: Spot the mistake anyone???
Post by: derekwarner on February 16, 2015, 09:09:18 am
Guys.....  >>:-( some may have been a little premature in assuming that a second [AFT] thruster  :o was missing

From the sectional image posted [thanks Umi].......we see the conventional FWD thruster being indicated as powered by an electric motor

However just AFT of this we see a representation of a diesel engine through a gearbox to a thruster.....but it appears to be inclined downwards  %%

More than meets the eye I would suspect...as this appears to be an Azimuth rotational thruster  O0 

Sceptics the lot of you......nothing wrong with Fried Rice...... :-)) ..........Derek

Title: Re: Spot the mistake anyone???
Post by: Netleyned on February 16, 2015, 09:15:03 am
That's a retractable azipod Derek.

Ned
Title: Re: Spot the mistake anyone???
Post by: sparkey on February 16, 2015, 09:45:10 am
 :-)) I think they ordered a super tanker :-))
Title: Re: Spot the mistake anyone???
Post by: Martin [Admin] on February 16, 2015, 10:14:15 am

1  x FPP retractable 13.5T thruster

Interestingly: Hospital: 1
Title: Re: Spot the mistake anyone???
Post by: Brian60 on February 16, 2015, 02:13:45 pm
How weird is that.

Umi's img looks to be exactly like mine but this one I have shows two tunnel thrusters...
Title: Re: Spot the mistake anyone???
Post by: Martin [Admin] on February 16, 2015, 02:28:58 pm
 
 Que dramatic music!   :o
Title: Re: Spot the mistake anyone???
Post by: Brian60 on February 16, 2015, 02:31:23 pm
I've just checked all my downloaded plans, I have 3 sets of line drawing, two show it with the azimuth pod and one that I have been taking measurements from show it with the tunnel thruster. In all other aspects these plans are exactly the same!
Title: Re: Spot the mistake anyone???
Post by: Netleyned on February 16, 2015, 02:34:36 pm
Any dates on the plans Brian?

Ned
Title: Re: Spot the mistake anyone???
Post by: Brian60 on February 16, 2015, 06:05:33 pm
Sorry Ned, just back from the local bar and a warming brew!

All three plans I have carry the exact same info in the bottom right corner as per the image, so something is amiss.... owever I am not about to change my current build because of plans {-)
Title: Re: Spot the mistake anyone???
Post by: derekwarner on February 16, 2015, 09:03:30 pm
Guys...as I mentioned before.............

1. nothing wrong with Fried Rice...... :-)) ..........but the vessel is hardly pretty is she?...
2. warm beer in Spain  >>:-(....don't they have electricity yet?........

Derek
Title: Re: Spot the mistake anyone???
Post by: RAAArtyGunner on February 16, 2015, 09:03:49 pm
 :o :o :o
Isn't that what we modellers refer to as builders licence, so why not for the full scale model builder.  %) %) %) O0 O0 O0
Title: Re: Spot the mistake anyone???
Post by: Peter_s on February 16, 2015, 09:19:56 pm
Am I being really dense :-X ............. Why would you need/want a retractable azipod?
Title: Re: Spot the mistake anyone???
Post by: derekwarner on February 16, 2015, 09:36:36 pm
I have never worked on such mechanical versions of black art machinery........if God wanted AZIPODS he would have given Noah one [or two] {-)

No sense in it being bashed about  <*< by partially sunken containers

Could it be only extended [lowered] when being used as a 360 degree drive for continuous GPS function?...13.5 tonne thrust is not a small value.........

[ie., to keep the vessel on continuous station?].............Derek
Title: Re: Spot the mistake anyone???
Post by: Netleyned on February 16, 2015, 09:46:28 pm
I was also thinking along the lines of dynamic positioning Derek.

Ned
Title: Re: Spot the mistake anyone???
Post by: NFMike on February 16, 2015, 09:58:28 pm
Could it be only extended [lowered] when being used as a 360 degree drive for continuous GPS function?

Almost certainly. You probably wouldn't risk leaving it down in general cruising (the extra drag would get expensive too) or use it in shallow water when docking, which will be why they have a tunnel thruster as well.
Title: Re: Spot the mistake anyone???
Post by: McGherkin on February 16, 2015, 10:57:54 pm
Am I being really dense :-X ............. Why would you need/want a retractable azipod?

Reduces drag when you're not using it. It's only meant for low speed maneuvering and emergency propulsion so when the ship's plodding across the Atlantic or wherever it doesn't get used.

EDIT: Ah, we're onto two pages. Yes, DP also comes into it.

I've had the misfortune of working on one, although electric driven. The worst thing was everything having to go up and down a single ladder run, from the bottom of the boat to just above the waterline, as the compartment was watertight up to there in case someone ever knocked it off.
Title: Re: Spot the mistake anyone???
Post by: Peter_s on February 16, 2015, 11:01:45 pm
Reduces drag when you're not using it. It's only meant for low speed maneuvering and emergency propulsion so when the ship's plodding across the Atlantic or wherever it doesn't get used.

EDIT: Ah, we're onto two pages. Yes, DP also comes into it.
Almost certainly. You probably wouldn't risk leaving it down in general cruising (the extra drag would get expensive too) or use it in shallow water when docking, which will be why they have a tunnel thruster as well.


Ahhhh the fog clears and yes I wasbeing daft. Obvious when you think about it! :embarrassed:
Title: Re: Spot the mistake anyone???
Post by: BarryM on February 16, 2015, 11:09:43 pm
I suspect she has a Rescue & Recovery role; what used to be known as a 'standby vessel'. (The GA appears to show rows of seats which would be a requirement for R&R.) If so, then she could spend long periods loitering when the continued use of the main engines would be inefficient. That's when the Aquamaster (if that's the make) azimuthing thruster comes into its own allowing the vessel to keep station with minimum fuel consumption and maximum efficiency.  She may have DP or may not.

Similarly if waiting-off for backload over an extended period, the Master might well elect to save fuel by going to the azimuth only or, if needing a bit more oomph (technical term) while towing, the azimuth may supplement the main screws.

Barry M

 
Title: Re: Spot the mistake anyone???
Post by: NFMike on February 17, 2015, 12:27:47 am
She may have DP or may not.
As a modern Anchor Handler I'd be amazed if she hasn't got some very sophisticated and accurate DP.
Title: Re: Spot the mistake anyone???
Post by: BarryM on February 17, 2015, 08:37:57 am
As a modern Anchor Handler I'd be amazed if she hasn't got some very sophisticated and accurate DP.

She may - she may not - the Ship's Particulars will confirm that. As an anchor handler it's not essential. However, if she spends a lot of time in the supply role, then she may well have DP for offshore, alongside, discharge and backload.

Barry M
Title: Re: Spot the mistake anyone???
Post by: sailorboy61 on February 17, 2015, 10:53:43 am
At least they are prepared and have a liferaft already inflated at the bow.

 %%
Title: Re: Spot the mistake anyone???
Post by: warspite on February 17, 2015, 01:02:58 pm
Infatable liferaft
NAAAAA, they just need a long pole - they must have sold it to the mexicans and this is a picture of the party - its a pinyada (however you spell it)