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Old 01-10-2021, 01:37   #1
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What is the Molded Depth on a Formosa ?

I have received some data on a Formosa 51 stating that the molded depth is 2.66m.

From research I have found that the "Molded Depth" refers to the depth from the top of the "flat" of the keel to the underside of the deck.

Given the Keel on a Formosa 51 can I assume the 2.66m is from the bottom edge of the keel to the underside of the deck since there is no top of the flat of the keel ?

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Old 01-10-2021, 03:29   #2
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Re: What is the Molded Depth on a Formosa ?

Moulded depth is usually a surveyors term involved in calculating net tonnage , ie cargo capacity

It runs normally from the keel floors to the underside of the deck excluding any extensions of the coach roof above that.
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Old 01-10-2021, 03:36   #3
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Re: What is the Molded Depth on a Formosa ?

Hi goboating,

Ok so it may not be the thing I am looking for.

I am trying to work out what the height of the boat is from the bottom of the keel to the top of the pilot house. I need to transport a Formosa 51 by road and of course the most crucial aspect is the total height from the ground when sitting on the trailer.

The Ships reg papers for the boat give a dimension of 2.66m Molded Depth. I was thinking that this would help me figure out what the total height from bottom of keel to top of pilot house might be (I am not local to the boat).

Looks like its not what I was thinking it was.

So how do I figure out the height from keel to top of pilot house ?
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Old 01-10-2021, 04:25   #4
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Re: What is the Molded Depth on a Formosa ?

Can no one take 3 mins to measure this for you on site?
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Old 01-10-2021, 04:36   #5
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Re: What is the Molded Depth on a Formosa ?

Quote:
Originally Posted by Jim Jones View Post
Hi goboating,

Ok so it may not be the thing I am looking for.

I am trying to work out what the height of the boat is from the bottom of the keel to the top of the pilot house. I need to transport a Formosa 51 by road and of course the most crucial aspect is the total height from the ground when sitting on the trailer.

The Ships reg papers for the boat give a dimension of 2.66m Molded Depth. I was thinking that this would help me figure out what the total height from bottom of keel to top of pilot house might be (I am not local to the boat).

Looks like its not what I was thinking it was.

So how do I figure out the height from keel to top of pilot house ?
There is a very active FB group for Formosa 51's and Hudson Force 50's that could probably help you out quite a bit.

https://www.facebook.com/groups/19483639728/

Looking at pictures, it seems the bow, with or without the sprit, might be the highest part of the boat when transporting..my .02.
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Old 01-10-2021, 04:41   #6
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Re: What is the Molded Depth on a Formosa ?

I have a rough suggestion for you. You have a picture. You know the draft is 6.23’ (sailboatdata) carefully scale the waterline to bottom of keel and apply that to the waterline to top of pilot house.

Then do the same thing on the drawing provided in sailboatdata. The more close they come out the better hou feel about the measure.

Not as good as an accurate in person measure, but an accurate measure is not that easy either.

How much do you need?

If you need 10’ and come out to 11’ then you know. And visa versa.

Cheap and easy concept check.
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Old 01-10-2021, 04:44   #7
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Re: What is the Molded Depth on a Formosa ?

You have a good photograph taken perpendicular to the boat in the first post.

If you have an accurate known length on the boat (such as the length of the hull or waterline) then measure this distance on the photo and also the distance that you are interested in, from the bottom of the keel to the top of the pilot house.

The ratio of these two distances measured on the photograph multiplied by the actual known length will produce the result you are looking for.

There will be some sources of error, but it will be at least a reasonably close estimate.
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Old 01-10-2021, 04:47   #8
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Re: What is the Molded Depth on a Formosa ?

Quote:
Originally Posted by noelex 77 View Post
You have a good photograph taken perpendicular to the boat in the first post.

If you have an accurate known length on the boat (such as the length of the hull or waterline) then measure this distance on the photo and also the distance that you are interested in, from the bottom of the keel to the top of the pilot house.

The ratio of these two distances measured on the photograph multiplied by the actual known length will produce the result you are looking for.

There will be some sources of error, but it will be at least a reasonably close estimate.
Edit: it looks like Hpeer had the same idea .
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Old 01-10-2021, 04:53   #9
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Re: What is the Molded Depth on a Formosa ?

Quote:
Originally Posted by Chotu View Post
Can no one take 3 mins to measure this for you on site?
You'd think - right? I can only get someone in there end next week unfortunately. Everyone is busy with a schedule - thats just how it is I am afraid. I suppose its fair enough - cant just send anybody into the boat yard - their security also protects me.

I am busy driving thousands of kilometers of roads to eyeball the road conditions of the actual route to do as much as I can from my side.
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Old 01-10-2021, 05:01   #10
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Re: What is the Molded Depth on a Formosa ?

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Originally Posted by SV Siren View Post
There is a very active FB group for Formosa 51's and Hudson Force 50's that could probably help you out quite a bit.

https://www.facebook.com/groups/19483639728/

Looking at pictures, it seems the bow, with or without the sprit, might be the highest part of the boat when transporting..my .02.
Hi Siren,

Yes I did hear about them and I applied to join but so far nothing. I think it may be my facebook name i use. Its a kind of strange name so they probably think I am some sort of whacko or something - I cant think of any other reason they would not respond and allow me to join. For the record i am Jason Fridaythethirteenth on F.B.

Why the oddd Facebook name? - I thought it was clever years ago when I did it..... so F.B could not track me all over the Internet. Today I realise what a mistake it was to use that odd ball name. I have tried to sign up as the real me but of course Facebook with all thier tracking tech wont allow me to sign up again from the same IP address/PC/Phone (its probably more then that - they have probably geo referenced me and know my location)

So if anybody here is in that F.B group could you please tell the admins its a real Formosa guy who wants to join.
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Old 01-10-2021, 05:08   #11
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Re: What is the Molded Depth on a Formosa ?

Quote:
Originally Posted by hpeer View Post
I have a rough suggestion for you. You have a picture. You know the draft is 6.23’ (sailboatdata) carefully scale the waterline to bottom of keel and apply that to the waterline to top of pilot house.

Then do the same thing on the drawing provided in sailboatdata. The more close they come out the better hou feel about the measure.

Not as good as an accurate in person measure, but an accurate measure is not that easy either.

How much do you need?

If you need 10’ and come out to 11’ then you know. And visa versa.

Cheap and easy concept check.
This is a great idea ! I am not sure how to do it though. I was thinkingg something similar - there is a standard 2.6m high shipping container in the right side of the photo. We were trying to figure how to use that as a reference
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Old 01-10-2021, 05:37   #12
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Re: What is the Molded Depth on a Formosa ?

Quote:
Originally Posted by noelex 77 View Post
Edit: it looks like Hpeer had the same idea .
Appreciate the input from you guys.

The magic number i need is 4.8m or less.

I have been thinking.....how can I cut the keel off and reattach it
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Old 01-10-2021, 05:49   #13
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Re: What is the Molded Depth on a Formosa ?

Using the waterline length of the Formosa 51 (12.06m ) as the refrence distance produces a calculated bottom of the keel to the top of the pilot house as:

4.0m

There is some sorces of error, but I doubt it is over 4.8m
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Old 01-10-2021, 05:53   #14
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Re: What is the Molded Depth on a Formosa ?

Quote:
Originally Posted by noelex 77 View Post
Using the waterline length (12.06m ) as the refrence distance produces a calculated bottom of the keel to the top of the pilot house as:

4.0m

There is some sorces of error, but I doubt it is over 4.8m
Thanks Noelex. Appreciate.

When I say 4.8m what I meant to say was, a total height of 4.8m on the low bed trailer. The low bed is 900mm that means i have 3900mm absolute tops to put onto the trailer.

This is going to be close.
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Old 01-10-2021, 06:04   #15
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Re: What is the Molded Depth on a Formosa ?

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that means i have 3900mm absolute tops to put onto the trailer.
I suspect the error of the "photographic method" is greater than 0.1m. Unfortunatly it looks only a physical measurement will settle the matter.
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