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External
Since: Jun 02, 2005
Posts: 4
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(Msg. 1) Posted: Thu Jun 02, 2005 7:18 pm
Post subject: GRP runabout weight
Archived from groups: uk>rec>boats>motor (more info?)
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Is there a formula to work out the approx weight of a 13" (3.96m) GRP runabout?
I need to calculate the weight on the trailer for towing purposes.
The calculation needn't include motor, fittings seats, fuel tank etc.
Any help appreciated.
cheers
BrianM |
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External
Since: Jun 01, 2005
Posts: 2
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(Msg. 2) Posted: Thu Jun 02, 2005 7:18 pm
Post subject: Re: GRP runabout weight [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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BrianM wrote:
> Is there a formula to work out the approx weight of a 13" (3.96m) GRP runabout?
> I need to calculate the weight on the trailer for towing purposes.
> The calculation needn't include motor, fittings seats, fuel tank etc.
>
> Any help appreciated.
>
> cheers
>
> BrianM
Apologies if you already know but have taken it in to account elsewhere,
but the calculation DOES need to know about the motor, fittings, fuel
tank and indeed luggage usually carried.
Anyway, for info, I had a 13'6" speedboat once that weighed just under
500kgs on the trailer with all it's accessories.
HTH
--
Nick |
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External
Since: Jun 02, 2005
Posts: 4
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(Msg. 3) Posted: Fri Jun 03, 2005 9:51 am
Post subject: Re: GRP runabout weight [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Fri, 03 Jun 2005 07:06:53 +1200, xxx wrote:
> BrianM wrote:
>> Is there a formula to work out the approx weight of a 13" (3.96m) GRP
>> runabout? I need to calculate the weight on the trailer for towing
>> purposes. The calculation needn't include motor, fittings seats, fuel
>> tank etc.
>>
>> Any help appreciated.
>>
>> cheers
>>
>> BrianM
> Apologies if you already know but have taken it in to account elsewhere,
> but the calculation DOES need to know about the motor, fittings, fuel
> tank and indeed luggage usually carried.
>
> Anyway, for info, I had a 13'6" speedboat once that weighed just under
> 500kgs on the trailer with all it's accessories.
>
> HTH
thanks Nick, that gives me a pretty good idea - it just fits under the
max towable weight for a 2litre car (unbraked trailer)
BrianM >> Stay informed about: GRP runabout weight |
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External
Since: Jun 02, 2005
Posts: 4
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(Msg. 4) Posted: Fri Jun 03, 2005 9:52 am
Post subject: Re: GRP runabout weight [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Fri, 03 Jun 2005 06:12:39 +1200, Paul E. Bennett wrote:
> BrianM wrote:
>
>> Is there a formula to work out the approx weight of a 13" (3.96m) GRP
>> runabout? I need to calculate the weight on the trailer for towing
>> purposes. The calculation needn't include motor, fittings seats, fuel
>> tank etc.
>
> Very roughly it is (2*lenght*beam*displacement draft)/3 which gets you
> the volume of water displaced by the boat. All you then need to know is
> the weight of that volume of water (1m^3 = 1kg).
thanks for the formula Paul - I can work it out from there.
BrianM >> Stay informed about: GRP runabout weight |
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External
Since: Jan 30, 2004
Posts: 43
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(Msg. 5) Posted: Fri Jun 03, 2005 11:52 am
Post subject: Re: GRP runabout weight [Login to view extended thread Info.]
Imported from groups: per prev. post (more info?)
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External
Since: Jun 02, 2005
Posts: 4
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(Msg. 6) Posted: Fri Jun 03, 2005 10:37 pm
Post subject: Re: GRP runabout weight [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Fri, 03 Jun 2005 13:13:05 +1200, Paul E. Bennett wrote:
> BrianM wrote:
>
>> On Fri, 03 Jun 2005 06:12:39 +1200, Paul E. Bennett wrote:
>>
>>> BrianM wrote:
>>>
>>>> Is there a formula to work out the approx weight of a 13" (3.96m) GRP
>>>> runabout? I need to calculate the weight on the trailer for towing
>>>> purposes. The calculation needn't include motor, fittings seats, fuel
>>>> tank etc.
>>>
>>> Very roughly it is (2*lenght*beam*displacement draft)/3 which gets you
>>> the volume of water displaced by the boat. All you then need to know
>>> is the weight of that volume of water (1m^3 = 1kg).
>>
>> thanks for the formula Paul - I can work it out from there.
>
> Just noticed I missed a few zeros out when I posted (keyboard not
> keeping up with my fingers). Water is approximately 1000kg/m^3.
I thought you might have had lighter water in the northern
hemisphere as my boat came out at 4lb 3oz .... haha
cheers
BrianM >> Stay informed about: GRP runabout weight |
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External
Since: Jan 30, 2004
Posts: 43
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(Msg. 7) Posted: Fri Jun 03, 2005 10:37 pm
Post subject: Re: GRP runabout weight [Login to view extended thread Info.]
Imported from groups: per prev. post (more info?)
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