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As always Jay, thanks for your detailed reply. I think it would be bad form on my part to derail this thread with any more commentary, as it is really about introducing the Rock Salt 34’, which looks to be a fantastic boat, but I will clarify my comments and then desist.
- The discussion of (developable) bottoms was introduced back on page 1 of this thread, and I am continuing to add to this dialogue with my more recent post.
- I don’t know what “broadsides” are, but topsides, according to the Nautical Dictionary, are …….”the side area between the waterline and the deck”.
- Although I have not taken a rule to a Jupiter or Intrepid personally, I have seen lines drawings, and my recollection is that the forward TOPSIDES are (slightly) curved in two directions, subtle, but intentional, as are most FRP boats in this class. This occurs in the FWD area of the topsides, from the forepeak aft about 4’-6’ where the ruled surface “swarfs” around up to the tip of the bow. The rest of the topsides look to be ruled (for these two examples). There are good reasons for this, it is easy to make a mold with compound contour, and you get additional panel rigidity by using compound surfaces, which saves weight and gives a stiffer structure.
- The cold molded Carolina boat pictured has a cruise speed of 34 kts, and a top speed over well over 40kts. Semi-displacement hull?
- Most of the bigger FRP sportfish boats (Viking, Hatteras) use compound contour on specific areas of the bottom (and of course of the topsides). Every boat with prop pockets has compound contour, and many (most?) have compound contour in the forefoot area, below the waterline.
- I think we are saying the same thing regarding Carolina flare and non-linear buoyancy-my conclusion of the effect of this is exactly the same as yours.
- We disagree on the point of bow flare being cosmetic. I contend it is functional, by presenting the small(ish) footprint to the headsea, you get less drag and a better ride, the real reason for bow flare. The upper flare out provides much needed lift (buoyancy) when it’s really needed, to prevent the bow from being buried in big seas- a pretty elegant solution if you ask me. This point is pretty important, perhaps we could take a more detailed discussion to another thread? Particularly concerning ride quality?
- The cold molded boat loft surface pictured has no reverse draft (which would make de-molding difficult) other than the spray rail. If this were to be realized in FRP, you would make some concessions to the spray rail in the forefoot area to make the part “pullable”. Other than that, no reason why this could not be molded in FRP.
My point to all this is a disagreement (on my part) with the contention that somehow simple ruled surfaces are all that’s needed for best in class planing hull performance- be it below the waterline, or on the topsides. I know it’s possible to create decent boats with ruled surfaces everywhere, but I consider this a disadvantage, and a concession to (metal) manufacturing - a fact the Carolina guys have been schooling us on for many years.
Best of luck with the 34’-it’s truly a fine looking vessel.
Darb,
You're obviously a gentleman and I think we agree on a lot more than we disagree on. I, like you, will refrain froma tit-for-tat in this thread but would enjoy discussing it elsewhere. If you ever have an interest give me a call - direct line 207-400-7404. I'm more pleasant and complete verbally that I am typing.
Also - please let me apologize for the "broadside" error. I'm a huge fan of the British Navy war stories of Patrick O'Brian and am completely immersed right now. They are continually firing "broadsides" at each other and the term is in my forebrain. Must have looked rather ignorant.
__________________ Jay Perrotta, President
Rock Salt Alloy Boats, LLC
PH: 207-400-7404 jay@rocksaltboats.com
__________________ F350 4x4/ Dodge 2500HD 5.9L Cummins
Leaving the Picture of the Ford cuz I miss it
Pacific 2325 cc
Honda bf225
aluminumalloyboats.com
i was a frp boat builder for over 23 yrs, thats the bad news,the good news starting today, i am going to start saving money to buy one of these boats,wow,just for the record,my buddy splashed a seacraft hull,we splashed a contender,so i have a little taste in boat design,good luck,and i hope you do well
__________________ we do three types of work, good, cheap and quick you can have any two.
More photos soon - boat is being re-rigged and outfitted which doesn't make for good photos. As soon as it comes out of the barn, click, click, click!
Quote:
erniefish - 1/17/2009 9:39 PM
i was a frp boat builder for over 23 yrs, thats the bad news,the good news starting today, i am going to start saving money to buy one of these boats,wow,just for the record,my buddy splashed a seacraft hull,we splashed a contender,so i have a little taste in boat design,good luck,and i hope you do well
You're post made me incredibly happy - thank you!
__________________ Jay Perrotta, President
Rock Salt Alloy Boats, LLC
PH: 207-400-7404 jay@rocksaltboats.com
That is an awesome boat You should put some of the Shockwave seats on it and you would be set those are some of the best seats out there much better than Stidd's. Metal boats ride so much better than glass boats we just got a Metal Shark 24 at work and it is a sweet boat and it only has 150 Hondas still makes 42Knots loaded.
Bull, I think Jay is still breaking in the motors, other than short burst of NECK BREAKING power he may not have good hard fuel burn numbers yet.
We do know that the 34 breaks the 60 MPH with no problem . I'm sure in the next few weeks Jay will post some #s.
__________________ F350 4x4/ Dodge 2500HD 5.9L Cummins
Leaving the Picture of the Ford cuz I miss it
Pacific 2325 cc
Honda bf225
aluminumalloyboats.com
RE: Rock Salt 34' by Black Lab marine 
