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[derekwarner]

What units of measurement are these?....... ..........[chains, leagues, cables] ..... Derek

[kinmel]

Measurement is in feet.

This is a real markings on Skegness lifeboat.

[ray123]

it looks like its in  meters  BUT  its not 10 meters at the water line! 


6 = 0.6 meter


8 =0.8 meter


10= 1 meters


12 = 1.2 meters


if it was feet  the draft at the waterline would be 10ft!  no lifeboat would be that deep!


the mersey class has a draft of 1.02m   = 3.3feet

[kinmel]

it looks like its in  meters  BUT  its not 10 meters at the water line! 


6 = 0.6 meter


8 =0.8 meter



10= 1 meters


12 = 1.2 meters


if it was feet  the draft at the waterline would be 10ft!  no lifeboat would be that deep!


the mersey class has a draft of 1.02m   = 3.3feet

Of course it is !  The error should have screamed out at me

[dpbarry]

they were already on the boat,     when i picked it up,       i got given 5 blade brass props for it by a kind gentleman, with it only being on display at the station it diddnt matter  if it was 4 or 5 blade

No Problem..

Have just been looking at the props on our Mersey. They are 4 bladed and following on from another thread, they are exposed shafts hence the question.

Declan

[Tugtower]

Prop shop next time


http://www.prop-shop.co.uk/


all your propping needs 

[dpbarry]

Prop shop next time


http://www.prop-shop.co.uk/


all your propping needs 

Hi Tugtower.


Never saw as many different props etc - for models!!!


Declan

[Tugtower]

Only guy i deal with for all my props, he makes a fortune outta me


on another note tho i'm surprised no one pointed this out earlier 

[dpbarry]

Only guy i deal with for all my props, he makes a fortune outta me


on another note tho i'm surprised no one pointed this out earlier 

And by the looks of it, a fortune outta me as well 

The prop assembly on our 1:1 Mersey (I'm Crew) has exposed shafts with a stubby tube on each side protruding out through the hull. I'll have a look inside the engine compartment tonight to see what way they protrude inside the hull so that I can work out getting the angle correct.

Off up to the technology department to use cut out discs to represent props on their laser cutter so I can line everything up correctly.

Declan

[Tugtower]

OR failing the over use of technology old school works just as well...


thick cardboard, protractor, and a sharp blade or scissors! 

[dpbarry]

OR failing the over use of technology old school works just as well...


thick cardboard, protractor, and a sharp blade or scissors! 

It does indeed but this is my excuse as an ICT Technician on learning how to use the Solidworks program in order to 'assist' the Technology teachers and students on how to use the laser cutter and 3D printer. No Waste 

Method in madness!! 

Declan

[dpbarry]

What units of measurement are these?....... ..........[chains, leagues, cables] ..... Derek

10th of..

Equates out to 0.6, 0.8, 1.0 & 1.2m

Must verify but I think the tractor guys also use it as a guide to judge the depth of water they are in. I think they take it in up to the top of the tunnels. Not sure the height boat is off the ground to the bottom of the keel on the carriage. I think it is a meter + the 0.8 to give good clearance as the stern 'drops' as it slides of the carriage. Wouldn't want it bottoming out. 

Must measure this tonight. Jeeper.. I've quite a lot to measure tonight!!

Declan

[boat captain]

Prop shop next time


http://www.prop-shop.co.uk/


all your propping needs 

Simon Higgins has now left Swan Castings and is trading as Protean Designs tel 01789565228 from what I have heard you are better dealing with him.

[Netleyned]

Simon Higgins has now left Swan Castings and is trading as Protean Designs tel 01789565228 from what I have heard you are better dealing with him.

Defo


Ned

[Tug Hercules Fireman]

Units of Measure are in Decimeters; i.e. 1/10 meter

[derekwarner]

Decimetres..... ...I thought these were used only in Continental European fabric mills making Vaults if cloth....or were they Bolts of cloth?

1. Now there's another quandary...is a Vault or a Bolt metric or imperial? 
2. Just imagine walking into a Haberdashery with your Grandfathers folding 3' wooden rule and asking for 2 1/2  decimetres of McDougal's Tartan cloth.......or just enough to make a Sporran for your PINK balls [cricket that is]

Derek

[Netleyned]

Decimetres are used on Admiralty Hydrographic metric charts
Metres nd Decimetres replacing Fathoms and Feet.


Ned

[derekwarner]

Evening Ned............interesting about the Admiralty Hydrographic metric charts  .... but how are they designated?

Is a depth of 100.1 metres represented or listed as 100/10 ..............

I would suggest that the Dingbat  who proposed these dimensions was not a Master Mariner, Naval Architect or a humble engine fitter ....but that of a fool with a University Degree in bean counting.................  Derek

[CGAux26]

Anybody ever used furlongs per fortnight for speed?  Nah, me neither.   

[Tugtower]

Why did the thread get turned from requesting a prop supplier to nautical markings? 


Request my posts to be moved to the relevant post ...


http://www.modelboatmayhem.co.uk/forum/index.php/topic,54264.0/topicseen.html,


cos it looks like i posted something random in here!

[david48]

Try ships weight , just read a artical in the Sea Breezes mag about weight it was supposed to make it all clear , tons , tonnes , displacement tonnage , standard displacement tonnage ,lightweight tonnage ,deadweight tonnage , gross registered tonnage , net registered tonnage . Might have to read it a few time to get to grips with it .
David

[NFMike]

Try ships weight , just read a artical in the Sea Breezes mag about weight it was supposed to make it all clear , tons , tonnes , displacement tonnage , standard displacement tonnage ,lightweight tonnage ,deadweight tonnage , gross registered tonnage , net registered tonnage . Might have to read it a few time to get to grips with it .
David

I looked into this after watching the Harmony of the Seas programme. Gross tonnage (used throughout the programme for effect I guess) is about 225,000 tonnes, but her actual weight (displacement) is only about 100,000.
I think it's a measure that made sense when ships looked like ships, rather than a barge with 20 stories of boxed air on top 

[Colin Bishop]

Yes, modern cruise ships are actually not much bigger in terms of displacement/weight than the old Cunard Queens but they do have a lot more usable internal volume.

Colin

[dpbarry]

No Problem..

Have just been looking at the props on our Mersey. They are 4 bladed and following on from another thread, they are exposed shafts hence the question.

Declan

Hi Folks.. As a follow-on, I was led to believe the shafts were exposed but I'm wrong. They are actually stainless steel tubes with the main shaft running inside as per the photograph.

Declan