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VIKING SPORT FISHING 65
 

Viking is a company that has stood the test of time. If you were to describe this company in one word, it would be “passion.” Viking builds boats because they are passionate about what they do. They are always making improvements to their designs and you can see that throughout their history.

The Viking 65 first rolled out of the yard in 2000 and has since become known as one of the finest looking, strongest performing sportfisherman ever. Its clean, crisp handling allows it to cut through the water and make shallow to medium turns without losing speed.

From a style perspective, there are a few changes to previous years’ line ups. For one, there is more of a crown on the foredeck. Corners are more rounded, and frameless windows smoothly follow the contour of the cabin.

A massive cockpit allows for more than one angler on deck without getting in each other’s way. The 65 is known for its minimalism both on deck and below. You have all your fishing amenities strategically placed to avoid visual clutter. Take for example, a refrigerated drink cooler hidden under one set of steps and a cleaning supply and bait stowage compartment under another set.

The Viking 65s are built with two major parts – the hull and the foredeck plus the deckhouse and cockpit assembly. These components are mechanically and chemically bonded to create one-piece constructions that can take the punishments of any ocean year after year.
The hull weighs only about 1,000 pounds more than the 58. This is partly thanks to the end-grain balsa composite hull construction that gives the 65 great strength while also saving on weight. With exception to under the engine area, the stringers on the 65 are foam filled for additional weight reduction.

Two direct drive diesel MTU M91s capable of producing 1800 horsepower each can propel the 65 to just under 40-knots. Cruising speed off around 30-32-knots is both comfortable and smooth.

The purpose of tunnels remains the same as they did on my old boat: to help reduce the draft. Unfortunately, that goal is at odds with the laws of physics, which hold that a certain amount of propeller blade area is necessary for a certain horsepower, speed, and boat weight. If you don't have enough blade area, cavitation is the usual result. Cavitation manifests itself as noise, vibration, prop and rudder erosion, and degradation of performance, with increased fuel burn and reduced speed and range.

So how do you achieve the necessary propeller blade area and avoid all the problems? Generally, a larger prop diameter is more efficient than a smaller diameter, so bigger props are the obvious answer. Putting physics aside for a moment, that extra diameter has a practical downside: It aggravates the draft problem, since propeller tips are the low point on most boats. There's only so much space for props between the bottom of the boat and the bottom of the sea. We can't move the bottom of the sea, but we can move the bottom of the boat. This is accomplished with prop tunnels.

The sides of the tunnels are parallel to the centerline of the boat, and parallel to each other as well for their entire length. The sides do not converge either forward or aft. Looking closely at the black lines drawn athwartship, you can see that at the forward end of the tunnel, the shape of the tunnel roof begins very flat, and then transforms into a progressively tighter radius as we move aft toward the transom. At the point of the propeller location, very near the end of the keel on this example, the tunnel reaches its smallest radius. Aft of this point, from prop to transom, the shape can be maintained as in this Viking, or might converge just a bit to create a slight "nozzle" effect on some boats.

In addition to having the right shape for the tunnel, it is important to have the cleanest, most undisturbed water flowing into and out of the tunnel. This is done by avoiding discontinuities in the hull bottom and locating "bottom clutter," such as thru-hulls and transducers, out of the path of the water flowing into the tunnels. Shaft strut and rudder palms should be mounted flush, in indents molded into the tunnel, if at all possible.

Finally, there's the question of how close the prop should run to the tunnel walls. On installations without tunnels, the guideline is to allow 15 percent of the prop diameter (4 ½ inches on a 30-inch prop) as clearance between the hull bottom and the prop-blade tips, to avoid excessive vibration. With tunnels, this can easily be tightened up to 5 or 10 percent, and some designers have successfully gone to nearly zero without undue vibration. Obviously, this allows a few more inches of prop diameter, for more blade area and efficiency, with resultant speed, range, and efficiency gains and without added draft.


So there you have it: reduced draft and fuel usage, more speed and range, less cavitation and vibration. Tunnels aren't necessary for all boats, but when draft is a problem, they can be the answer.

We offer this primarily wood Viking 65 model at the following sizes. If you'd like a different size, please email us or a quote. We have built several 5' long yachts.

24"- 30" long  $3,200 Shipping and insurance in contiguous USA included. Other countries, $300 flat rate. 

36" long  $3,700 Shipping and insurance in
contiguous USA included. Other countries, $400 flat rate. 

42" long  $4,500 Shipping and insurance in contiguous USA included. Other countries, $500 flat rate. 

Model is built per commission only. We require only a small deposit to start the process $500    The remaining balance won't be due until the model is completed, in several months.

We can build any powerboats. Custom model is our specialty. Accurate and premium quality. If you can take photos of your boat, we can build the model for you. The process is simple and easy. We need only a small commitment deposit to start the process. The remaining balance won't be due until the model is complete. Please click here link for lead time.

Nobody builds better yacht models than ModelShipMaster. Click to learn more: Premium yacht models

Click to view our other Viking boat: Viking 64, Viking 68, Viking 74, Viking 82.