24′ Efficient Aluminum Power Cruiser – Design Update

Since we are getting close to starting construction drawings on our 24′ Aluminum Power Cruiser design, it seems a good time to share our progress.  In a previous post we discussed the design brief and intentions for this design and thankfully, since these haven’t changed, I won’t repeat them here. 

Designing with aluminum, steel, plywood, or other plate material, with the intention of using a CNC machine to cut the various parts, requires that all surfaces are developable or have no compound curves.  Simply put, the parts must be curved in only one direction.  For example, you can wrap a piece of paper around your typical coffee mug, but you can not wrap that paper around a basketball.  These qualities must be considered as they greatly affect how the hull and superstructure are constructed. 

Every designer seems to have their own methods of creating  developable surfaces, some use expensive computer programs while others use the century-old method of hand-drawing multi conic projections.  I use a combination of both as can be seen in the screen shot from when I was creating the curved hardtop visor. 

Whichever method is used, it is important that aesthetics aren’t sacrificed in the attempt to ease construction. 

Using our method, a hull was designed that incorporates some bow flare that transitions to  tumblehome in her aft sections.  Constructed of 6 major plates that have been cut by a computer, the hull will wrap around her frames and can be easily welded together.   

 As you can see from this comparison, we have successfully remained very close to our original preliminary sketches.  A few changes have occurred to improve aesthetics and ergonomics, like the small cabin house added to the fore deck. 

Bow Perspective

Aft Perspective- Note the curvaceous but developable stern.  

 

 

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4 Responses to 24′ Efficient Aluminum Power Cruiser – Design Update

  1. Hi. This boat really intrigues me. I currently have a 26′ fully restored Marinette that has served us flawlessley since 2005 on Lake Anna Va. However, we were thinking of looking for something with an outboard that was a little narrower so we could put it in a local dockominium that cannot fit our Marinette. When will this boat be ready for sale? Is there ar projected price? Is it really that narrow? I thought 8’6″ would be perfect for a boat like this.
    Thanks very much, it is a beautiful looking boat.
    Bob

    • Kurt says:

      Bob,
      Thanks for your interest! The Sunset Channel’s beam is narrow at 7.5′. The main reason for this was fuel efficiency. A narrow beam decreases her Displacement to Length ratio and her Length to Beam ratio has been shown to be the most efficient while improving her sea kindliness. I have sent you an email with more details. Regards, Kurt

  2. It’s so interesting seeing how renders are created and how the different lines come together to create a captivating three dimensional image! It must be so useful for imaging how the final build of your boat will actually look!

  3. Michael Collins says:

    Bob I think this boat is very cool, I have aMarinette 28 Express closest thing to an affordable pilot house boat, I am in the process repowering her with a 150 Merc four stroke, on a sea mount bracket, tired of fighting the unreliability of old V 8s

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