AluminumAlloyBoats.com

Not a big fan of Nyalic, it is not petrol-chemical resistant. It is widely used here, but you often see a brown stain below the fuel filler and vent from spilt fuel and fumes. CRC or WD40 will also dissolve it, and believe it or not, so will sunscreen.

Doesn't extending the hull plates back 2' then make it a 24' boat anyway? Is not the length of a boat measured from the aft-most section of the bottom plates to the top of where the sides meet at the bow (excluding any overhang, bow-sprit, rails, etc)?

When I'm sitting at anchor with my motor off I can pick up other boats running around me over 1/4 mile away. I don't pick up all boats though. This is exactly what passive sonar relies on. The speed of sound in water is something like 4800ft/s at 60 degrees F, so fast enough to consider the informa...

Being picky, but how is that LEESHORE - 19' a R.H.I.B.?

I'd agree with pjay. Why not go for the bracket? Perhaps not the full hull extension as his boat, but incorperating a 'swim-step' either side of the pod would add the required stiffness to the transom / bracket arrangement. Then 'box in' the swim step down to the transom (about 1 3/4" from the ...

swaging the sides could give you that 'clinker' built style without the hundreds or hours required to weld them.

5083 work hardens and becomes brittle very quickly when folded. Having said that many years ago in New Zealand when my drawings had someone else's name in big writing on the title box, we did design a 10m cat where we folded the keel line. As multiple boats were built it must have worked out ok. Pr...

CTMD wrote: If you want some transom deadrise you would need to fold the keel line, which if using 5083 folding is a bit of a no-no. From my understanding on the other side of the world the Tolman skiff is basically a warped bottom (variable deadrise) hull built out of developable surfaces.

why?

Cheers guys. I've been doing it a little while now, but you always end up more proud of some than others. My all out favorite would have to be the grey with silver stripes which went to the UK, but the yellow with black stripes comes a close second with the 6.0L LS motor and SDM 8.25" pump with...

Here are a few pics to share which I enjoy http://i449.photobucket.com/albums/qq218/rpmspeedboats/Mitchell%20Machines%20Rec%20Jet48%20MIT22/P1000756-1.jpg http://i449.photobucket.com/albums/qq218/rpmspeedboats/Mitchell%20Machines%20Rec%20Jet48%20MIT22/boat112boat1.jpg http://i449.photobucket.com/alb...

Used a 350P. Decididly average and I'd consider it a higher end domestic welder. Have been using Fronius welders since '99. Put at least 350lbs of welding wire (1.2mm or 0.047") before tip changes. Usually replace tip due to wear rather than burn-backs, which are rare. Has programs to weld alot...

That style of 'tread plate' is very popular here. It comes in grade 5052, and has 5 bars in one direction then 5 the other. Depending on the original mill it originated (most of our alloy is imported from Europe, some from Oz if we're in a hurry and of short supply) the tread can be 3-4mm high. It d...

Some manufacturers will combine the two, using the 5083 / 86 (H32, 321, 116) for the high wear or 'impact' areas, then use the softer 5052 or 5251 for less structural components where the advantages of a more malleable alloy to form more complex shapes is desirable. Look for where the alloys are bei...

Could the ply not be used to reduce resonant noise inside the cabin? I avoid the use of marine ply with alloy boats and prefer to use a hardwood ply. This is because here the marine treatment process soaks heavy metals like arsenic and copper into the wood which tend to leach out and corrode the all...

The funny thing is when compared to say a BC and you mentioned the 6.1, its nearly 1/2 meter longer and over 200mm wider in the beam even though its only a 6m, but that would make a good topic for another thread, Th e Rubbish Written on boats! I've bought that up with the guys at Surtees Boats (who...

katoh That's basically it in a nutshell. With the transom deadrise being the same, the warped hull will be a little more tender at rest but will be more comfortable once the weather is less than perfect. The finer entry at the bow will cut through the waves without 'slaming' atop them. The Surtees a...

Your decision to go either way may also depend on your operating conditions / locale. As we've tended to specialise in variable deadrise / warped hulls, the ability to generate more lift at the transom for load carrying while maintaining a reasonable amount of ride comfort plays big into the equatio...