What does my boat weigh?

[Mirror Painter]

I hope that you may be able to offer guidance on calculating the weight of my boat.

I ask because I am considering the purchase of a trailer. Said trailer is likely to be used twice per year for winter maintenance. That is, to transport the boat from river mooring to house driveway and back again.

The boat spec's are thought to be as follows:

Marina 16GT
LOA - 4.96m
Beam - 2.09m
Draft - 0.16m
Speed - 30knots with 50hp.

Plus there should be a picture of her at the top left of my post!


Thank you.

 

[sailorman]

http://www.shetland.owners.org.uk/forums/show_thread.asp?g=1&replyid=13217&forumid=1

 

[Csail]

About a tonne but surely it cheaper to hire a contractor to shift it?

 

[Mirror Painter]

I don't see any infromation about weight there?

http://www.shetland.owners.org.uk/forums/show_thread.asp?g=1&replyid=13217&forumid=1

 

[VicS]

About a tonne but surely it cheaper to hire a contractor to shift it?

I was going to suggest abut 0.5 tonne.

 

[Mirror Painter]

About a tonne but surely it cheaper to hire a contractor to shift it?

The idea was that with a trailer I could perform an annual trip to land for a pressure wash etc. I think a light weight trailer may be had new for about £1,000 so hopefully less for a used one.

How much will a contractor charge to lift the boat from the water and deliver it to my place about 30 miles away? Quite a lot, surely?

 

[sailorman]

I don't see any infromation about weight there?

Its a forum just ask

 

[Mirror Painter]

Its a forum just ask

A bit obtuse for me old chap. Do you mean you posted a link to a Shetland forum and I should ask there? My boat isn't a Shetland.

Strikes me you are too smart for me. Please explain yourself.

Roll eyes etc ...

 

[Csail]

The idea was that with a trailer I could perform an annual trip to land for a pressure wash etc. I think a light weight trailer may be had new for about £1,000 so hopefully less for a used one.

How much will a contractor charge to lift the boat from the water and deliver it to my place about 30 miles away? Quite a lot, surely?

Suppose it depends who you know but for twice a year it seems a lot . Also i said a tonne because when you get pulled its all up weight so empty all the kit out and tanks etc.

 

[Mirror Painter]

Not to lose sight of my original question, can anyone tell me how to calculate the weight of my boat???

 

[VicS]

Not to lose sight of my original question, can anyone tell me how to calculate the weight of my boat???

No I don't think anybody can tell you how to calculate the weight. Given a set of line drawings perhaps a naval architect could.

But if you want to have a go
Determine the volume of the hull up to the waterline in cubic decimetres. Each cubic decimetre will be the equivalent of 1 kg

 

[Mirror Painter]

No I don't think anybody can tell you how to calculate the weight. Given a set of line drawings perhaps a naval architect could.

But if you want to have a go
Determine the volume of the hull up to the waterline in cubic decimetres. Each cubic decimetre will be the equivalent of 1 kg

Thanks Vic - that's food for thought.

My cursory looks at trailers shows a great difference in price between 'half a ton' and 'one ton'. Your response allows me to work towards having a clue!

 

[Scareyclott]

Can you find it on a site like this http://www.yachtsnet.co.uk/archives.htm if so you can find out its displacement which will give you a good idea of its weight

Google says
"Simply put, the displacement of any boat is the amount of water the hull displaces when it floats. The weight of the water being displaced will be equal to the weight of the boat...assuming it's still floating, that is."


Scott

 

[Csail]

You can't without lifting it.

 

[Lakesailor]

Boat 450Kg
50 hp motor, about 100Kgs
Trailer about 300 Kgs
Kit about 100Kgs

That makes a trailer with GTW (Gross Trailer Weight) 1000Kg capacity. Better to allow 1200Kgs.
Check your tow vehicle can tow 1200Kgs legally. It'll be the braked trailer weight.

 

[VicS]

I have found a weight for a Marina16 Fisherman of 394 kg !
And weights for other similar boats of the same size in the range 385 to 450kg

As Lakey says you will have to add the weight of the engine ( A standard shaft, 2 stroke 50hp Evinrude for example is 83 kg) and any gear you leave on board including the weight of fuel.

It would be foolish to not allow a good safety margin so it looks as though you will need a trailer with a capacity of around 800 kg.

 

[Greenheart]

Are you one of these chaps?

http://www.moxon.jobearnshaw.com/

Almost the only Moxon I every heard of was fictional. The evil genius in John Buchan's 1919 novel, Mr Standfast.

I expect the 17th century hydrographer-chappie, Joseph Moxon, could have told you what your boat weighs.

 

[sailorman]

A bit obtuse for me old chap. Do you mean you posted a link to a Shetland forum and I should ask there? My boat isn't a Shetland.

Strikes me you are too smart for me. Please explain yourself.

Roll eyes etc ...

MoBos all look the same to me

 

[Lakesailor]

I have found a weight for a Marina16 Fisherman of 394 kg !
And weights for other similar boats of the same size in the range 385 to 450kg

The 450 Kg I found was for the GT variant. Don't know how that makes so much difference really.

Don't forget the weight of the trailer is included in the GTW (the suspension units and the tyres have to carry the weight of the trailer).

 

[Mirror Painter]

Thank you all very much for the information.

Vic and Lakesailor - could you tell me where you found those weights? I hope I'm not missing something obvious but am reading / typing on the Q.T. at work!

The boat came with the name Moxon - I beleive it was the family name of a previous owner.

I have also misled you about the engine - mine is a 7.5 H.P.

Stephen.