Gross Tonnage

[Andrew s/v Hafwen]

Does anyone out there happen to know the gross tonnage of a 31'?

Andrew
SV Hafwen
'81 31' #167

[Lipham]

11,100 lbs

Sent from my iPad

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[kei...@comcast.net]

The original brochure in 1979 did state that the displacement was 11,100. However at that time almost everything was an option including an inboard engine, hot water heater, hot and cold pressure water, stove with an oven, instruments, teak interior, the list goes on. I have always felt the boat with all that equipment was at least 12,000 lbs empty. Sailing weight with a normal load was probably closer to 13,000 lbs than 12,000 lbs. 

I have never shipped my boat but if any of you did I will bet that trucker knew exactly what his load weighed.

I will also add that manufacturers are known for tweaking the weight of their boats to the low side to make some of the performance numbers look better. Now I have no concrete evidence that Tom Allmand ever purposely tweaked the displacement numbers but it is not uncommon for early specifications to underestimate the actual weight of final production versions. One good example of that by a reputable manufacturer was the introduction of the Catalina 380 in 1996 I think it was. The original specs said it weighed a little over 16,000 lbs. I was running Hellier's at the time and we ordered a stock one in the fall. When we moved it to our inside showroom it broke a set of dolly's we used for that purpose. The next year I noticed more up to date brochures showed the weight at 19,500 lbs. I could site numerous examples of either innocent mistakes or outright misinformation. My own Saga 43 showed a displacement of 19,800 lbs but the foreman confessed to me the real weight was a little over 22,000 lbs.

Hope you find this info helpful.

Keith on Camelot

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From: "'Lipham' via Allmand" <all...@googlegroups.com>
To: all...@googlegroups.com
Sent: Tuesday, March 21, 2017 4:21:14 PM
Subject: Re: [Allmand] Gross Tonnage

[Andrew s/v Hafwen]

Thanks for the replys. What I am actually looking is gross tonnage (a measure of volume) as it would pertain to CG documentation, not displacement. I'm just being lazy and not doing all the measuring and math....

Best,

Andrew
SV Hafwen

[kei...@comcast.net]

Andrew

I think it was 12 gross tons from memory but I can't be positive. Maybe someone else out there can confirm exact number.

Keith

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From: "Andrew s/v Hafwen" <noiseb...@gmail.com>
To: "Allmand" <all...@googlegroups.com>
Sent: Tuesday, March 21, 2017 11:53:02 PM

Subject: Re: [Allmand] Gross Tonnage

[EDDIE...@aol.com]

My Coast Guard Documentation says Gross Tonnage is 15GRT and Net Tonnage is 12NRT. The Doc Cert also lists length as 30.7, Breadth as 11.3 and Depth as 6.8. That  is for our 1983 Allmand 31. Formally Allmand Joy.  Hope that helps.   Ed Smith NPR, FL

[EDDIE...@aol.com]

Andrew, did you see my CG DOC info?? Ed Smith

 

In a message dated 3/21/2017 3:59:01 P.M. Eastern Daylight Time, noiseb...@gmail.com writes:

Does anyone out there happen to know the gross tonnage of a 31'?

Andrew
SV Hafwen
'81 31' #167

[Andrew s/v Hafwen]

Thanks all. That is exactly what I was looking for. I was guessing somewhere in the 13GT range....

Best,

Andrew
SV Hafwen