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Old 05-07-2010, 21:35   #1
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38' Steel Boat - 30,000 lbs ?

Does that sound right? I have been looking at glass boats around the 37-38' range. Most are around 15-16,000 lbs. Does it sound right that a 38' Roberts would weigh in a 30,000 lbs?

I like the idea of a steel boat but at 30,000 lbs would it be a complete slug to sail?
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Old 05-07-2010, 21:49   #2
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Are you sure they are 15-16k lbs? And are you sure that the Bruce Roberts is actualy 30k?

A Island Packet 37' vessel is speced out for 24,000 lb. I'm sure once you include crusing gear, they're heavier than that.

A Catalina 387 is speced out to weight 19500 lb.

The plans for the Bruce Roberts Spray 370 on the internet say they're seped for around a 24k displacement. Again, I'm sure they're heavier in service.

So 30k for a vessel that's 1 foot longer, more or less riged for offshore, and might already have gear in it sounds reasonable to me. It still is probably a bit heavy.

There are so many other things that influance how it sails, I would be inclined to take it for a spin before discounting it.
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Old 05-07-2010, 23:36   #3
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ViribusUnitis: Thanks for the quick reply. Actually I was not discounting it. I was asking more experienced people than myself. It just seemed that 30K sounded heavy. Your point is a good one. Take it for a spin indeed. Unfortunately someone else has already placed and offer. I waited two days too long.
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Old 05-07-2010, 23:58   #4
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A fully laden warship can weight a lot more than that and still make 30 kts.

Weight is only a factor when getting under way and coming to a halt. The more weight, the more time it takes. But once under way, that weight becomes energy.
Hull shape is whats import.
30'000 lbs if shaped like a torpedo will be fast once up to speed.
15,000 lbs if shaped like a barn door will be slow as a dead pig
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Old 06-07-2010, 00:48   #5
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Rather than worry too much about gross weight, see whether she is floating reasonably close to designed waterline. On your test sail make sure that there is a stiff breeze and you will get to see if she is too tender ( ie weight too high).
Regards , Richard.
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Old 06-07-2010, 01:17   #6
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The Roberts Spray 38 in steel weighs in at 29,000 according to his webiste, so your 30,000 lbs is not out of line.

Boat plans Roberts Spray 38
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Old 06-07-2010, 04:49   #7
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Offshore 38...

If you have a look at the Bruce Roberts Australia website you should be able to get some idea of the weight.

The Offshore 38 has the following specifications:-


L.O.A. 11.66 m 38' 3" L.W.L. 8.38 m 27' 6" Beam 3.43 m 11' 3" Draft 1.70 m 5' 7" Displ. 7,010 kg 15,456 lb Ballast 3,048 kg 6,720 lb Power (Diesel)
20 - 30 h
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Old 06-07-2010, 05:32   #8
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I have a Murray 33, 33' in steel. Ted Brewer shows her as a little over 13,000 pounds. My PO weighed her on the transport truck, sans rig, at 16.000. I'll bet she is not at 18,000 to 19,000.

I have seen them advertised from 13,000 to 20,000.

So my bet is that you have a more or less accurate weight taken when she was lifted full of cruising gear.
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