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Author Topic: Waterline marking?  (Read 979 times)

tizdaz

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Waterline marking?
« on: December 14, 2021, 04:22:14 pm »

Hi guys,


What's a good solid way to put the waterline on the hull to mark where to mask etc.


My hull will be 3 colours so I'm going to need to put 2 waterlines, my hull is large (1/12 scale - 1.8m TID).


I know we can buy a tool for this but cheapest i found was around 40-50!! but I've heard of people making there own jigs that holds a pencil etc? any info much appreciated!




:)
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tonyH

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Re: Waterline marking?
« Reply #1 on: December 14, 2021, 04:32:52 pm »

Re: "Envoy class HMRT Enigma" is a thread from Radiojoe in 2014, so if you do a search for it there's a photo of one he made.
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Umi_Ryuzuki

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Re: Waterline marking?
« Reply #2 on: December 14, 2021, 04:48:49 pm »

Yes, make your own jig.  :}
 This one was made using the frame cut outs.

tizdaz

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Re: Waterline marking?
« Reply #3 on: December 14, 2021, 05:38:06 pm »

that looks simple enough! :) Thanks buddy
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Fred Ellis

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Re: Waterline marking?
« Reply #4 on: December 14, 2021, 11:04:08 pm »

Squires Model & Craft tools used to do one http://www.squirestools.com/home.htm
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RST

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Re: Waterline marking?
« Reply #5 on: December 15, 2021, 12:45:24 am »

Hi,


The recent trend is to use a laser level or mini "dumpy" laser to mark a waterline though I've never seen a post how it works or the advantage over the simple "pencil" on a block method (I have such a laser which I used for work but can't see how to use it for models as it doesn't remove the need for marking up).  That said, on very large models maybe it's more practical to get a reference?


The old techniques used to be:


  • Place in the bath and ballast correctly, sprinkle talc and let the water out.  As the WL should normally always be above to account for real-life, measure a uniform distance above when applying markings or masking
  • Pencil (or whatever) on block and move it around, or the model on a flat base
  • Just measuring offset from a  known point enough to string up a line of tape
...There's not much need to complicate it.  MK 1 eyeball Always applies when applying the line from front to aft and from side to side.  I used pencils on blocks for 30 years -I guess that's been used in a form for 300 years or more.


Since we can post .stl files now, if you feel a reluctance to tape or glue a pencil to a block, feel free to use my waterline marker if you know someone with a printer and I used it a couple of times absolutely OK.  It uses about 50p of materials (excluding a couple of M3 or M4 bolts and nuts plus the pencil!) but design time is obviously the expensive part so your price seems OK to me for a retail item, it does no better than a pencil on a wooden block as in the modelling books.  My laser level cost me 30 without batteries if you prefer that for a bigger hull, I've never tried to use it on a model.


...I know you're splitting posts up rather than following your build thread but please bear in mind your other question regarding painting sequence it's worth bearing in mind curvature of the parts and masking off also.  For a good result use thin tape (such as Tamiya) and pay attention whether it's best to mask upwards or downwards according to the curvature.  Where possible apply a thin or dry coat of the same base colour over the tape edge to seal it and let it try before applying the next colour.  This is basic model painting stuff you can check on youtube etc.


Hope it helps,


Rich


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RST

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Re: Waterline marking?
« Reply #6 on: December 15, 2021, 12:50:17 am »

Picture attachment won't work which is unusual but not the first time I've had this in the last few weeks for other reasons, the usual file compression methods won't reduce file size.  See if this works...

...Nope (bring back MS picture manager -it just worked!!!).

Hmm, try again (imported to powerpoint, re-saved as a .jpeg), bingo:

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tonyH

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Re: Waterline marking?
« Reply #7 on: December 15, 2021, 09:30:42 am »

I haven't seen it mentioned if you're going to make a "pencil holder" type but beware of gluing the pencil in place. You'll find that the stern can be a "b****r to mark unless the pencil is pointing uppishly(?), otherwise either it can either slip, or the pencil can stray off the intended line. Obviously, if the hull is upside down, the pencil will point downishly(?) %%
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tizdaz

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Re: Waterline marking?
« Reply #8 on: December 16, 2021, 01:33:02 am »

Hi,


The recent trend is to use a laser level or mini "dumpy" laser to mark a waterline though I've never seen a post how it works or the advantage over the simple "pencil" on a block method (I have such a laser which I used for work but can't see how to use it for models as it doesn't remove the need for marking up).  That said, on very large models maybe it's more practical to get a reference?


The old techniques used to be:


  • Place in the bath and ballast correctly, sprinkle talc and let the water out.  As the WL should normally always be above to account for real-life, measure a uniform distance above when applying markings or masking
  • Pencil (or whatever) on block and move it around, or the model on a flat base
  • Just measuring offset from a  known point enough to string up a line of tape
...There's not much need to complicate it.  MK 1 eyeball Always applies when applying the line from front to aft and from side to side.  I used pencils on blocks for 30 years -I guess that's been used in a form for 300 years or more.


Since we can post .stl files now, if you feel a reluctance to tape or glue a pencil to a block, feel free to use my waterline marker if you know someone with a printer and I used it a couple of times absolutely OK.  It uses about 50p of materials (excluding a couple of M3 or M4 bolts and nuts plus the pencil!) but design time is obviously the expensive part so your price seems OK to me for a retail item, it does no better than a pencil on a wooden block as in the modelling books.  My laser level cost me 30 without batteries if you prefer that for a bigger hull, I've never tried to use it on a model.


...I know you're splitting posts up rather than following your build thread but please bear in mind your other question regarding painting sequence it's worth bearing in mind curvature of the parts and masking off also.  For a good result use thin tape (such as Tamiya) and pay attention whether it's best to mask upwards or downwards according to the curvature.  Where possible apply a thin or dry coat of the same base colour over the tape edge to seal it and let it try before applying the next colour.  This is basic model painting stuff you can check on youtube etc.


Hope it helps,


Rich


Hi Rich,


Yeh i have a laser level, but its not brilliant but that's probably because its a pretty cheap one i picked up few years ago! So im going to go down the route of using the pencil/holder as its pretty much fool proof, thanks for the tip regarding a thin layer of previous colour over the masking to seal it before next colour! ... I've never done this over the years when spraying my bodyshells, but then we spray them from the inside etc so its a different method, spraying boat hulls is a whole new ball game to me! The bath tub method is definitely a no go for me as i don't have a bath tub that size!


Regarding your device, what's the max height it can reach? as my 2 waterlines need to be around 10cm & 15cm?


Thanks buddy

I haven't seen it mentioned if you're going to make a "pencil holder" type but beware of gluing the pencil in place. You'll find that the stern can be a "b****r to mark unless the pencil is pointing uppishly(?), otherwise either it can either slip, or the pencil can stray off the intended line. Obviously, if the hull is upside down, the pencil will point downishly(?) %%


Thanks for heads up! ..yup i was wondering about this section as it does look like it maybe trial & error til i get it just right!! :D
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tonyH

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Re: Waterline marking?
« Reply #9 on: December 16, 2021, 09:46:02 am »

"Regarding your device, what's the max height it can reach? as my 2 waterlines need to be around 10cm & 15cm?"


It's all a matter of "wobble". Whether it's a laser line or a pencil on a stick it's got to stay stable along the length you're marking, so it doesn't matter whether it's wedged up or on a pile of books :-))
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Peter57

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Re: Waterline marking?
« Reply #10 on: December 16, 2021, 02:23:53 pm »

It might be worth looking at Cornwall Model Boats site. They advertise two markers at between 10-11. I bought an Amati marker which works fine.


Regards

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tizdaz

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Re: Waterline marking?
« Reply #11 on: July 12, 2022, 01:29:49 am »

It might be worth looking at Cornwall Model Boats site. They advertise two markers at between 10-11. I bought an Amati marker which works fine.


Regards


this is the one i went with, seems very solid & long enough to do my 2 waterlines, not used it yet as not got around to painting the hull...but will be shortly!! :)
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Fred Ellis

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Re: Waterline marking?
« Reply #12 on: July 12, 2022, 07:45:44 am »

Hi One and All
I think I must have used most of the ways to put a water line onto our models,
1  Mark 1 eyeball
2  Talcum powder on the water
3  Pencil on a block/manufactured pencil marker
4  Chalk line
5  Laser
The only ones that has not be confined to the back of the workshop is the mark one eyeball - talcum powder & time, using all three I now get a water line that I am happy with.


The moral of my story is If it works for you it may not work for others, so just do what you think is right for you.

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