Boat Plans Nz | Getting The Most Out Of Your Power Boat

Boat Plans Nz

Trimming a boat correctly is critical in maximizing efficiency, reducing fuel usage and also improving ride quality. Most boaters do this by “feeling” the boat under them, but there is a much better way of doing this.

Fuel flow meter

The use of fuel flow instruments is critical in determining the best trim position as it gives you fuel usage and does not rely on subjective “feel” from the skipper.

An example of this was done by a friend of mine who was operating 2x B150 Honda outboards. Whilst under way and operating at normal cruising speed, the fuel consumption for both engines was 56 litres per hour.

Trimming the engines up and down without touching the throttles and reading the fuel flow gauge, the fuel consumption went from 56 litres per hour down to 39 litres per hour. Overall, this is a savings of approx 30%, just from adjusting the boats trim while monitoring the fuel gauges.

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Although fuel flow meters will more accurately provide details about trim position and fuel economy, they will not always be viable or practical in small tiller steered vessels. People with smaller boats need to spend time testing their boats by adjusting the tilt pin to suit the conditions that they normaly operate in. By adjusting the tilt pin, the attitude of the boat when underway will change the thrust line of the outboard resulting in two things – improved performance (fuel and speed) or less performance.  

  

An additional option to improve performance is to fix a Hydrofoil stabilising system to your outboard cavitation plate. With boats that are stern heavy, by providing max lift at the outboard using a hydrofoil, you can adjust the trim angle of the boat with greater efficiency.
The key is finding the tilt angle that best suits your regular load and usual conditions. 

Another problem with incorrect load distribution (too much weight aft) is "porpoising."

 Porpoising is the name given to the forward and back motion some boats make
while riding on the water. Picture a porpoise leaping through the water and you get the idea. It may be fine for them, but its murder on a boat’s performance, comfort and safety. This action is actually caused from too much weight at the back of the boat. In other words, incorrect weight distribution. This pounding causes many people to ride only in the very back of the boat. With correct load distribution and the use of Hydrofoils, this can correct this action, providing you with more comfort, safety and performance.

Ensuring the correct propeller choice is crucial for fuel economy, top end speed and hole shot (getting the boat out of the water at start up) unfortunately, many boat owners worry about their speed at a certain RPM when they should be more concerned about their outboard operating within the recommended range in which the outboard has been designed. Setting up to achieve a certain speed at a certain RPM is like pissing fuel into the wind. It usually results in an outboard not performing optimally across the RPM range for fuel and performance either in the bottom or top end range. Many boat owners go down the path of sourcing non-genuine props, believing it is the only way to go to gain improved performance. Unfortunately, any changes made to the boat for example load, application or configuration, the performance will change and it possible that a different prop will then be required.

To best assist you, I suggest it pays to seek advice from your outboard manufacturer through their dealer network of which you’ll need to provide the size of the prop, pitch diameter and max RPM with regular load, the mounting height of the outboard and your opinion of its performance in turning situations and hole shot. With this information, the dealer will be able to advise a prop that will deliver an improved result.

Setting up your boat for maximum efficiency isn’t easy. There more to it than prop, motor and boat.
Gross weight, weight distribution, motor height, weather and sea conditions all play a part, but I hope this has given you a few things to think about when it comes time to use your fishing rig. By being sensible with how you set up, use and power your rig, you might find that you have extra money in your pocket at the end of the day.

Have a good one
Mark

Tonys Cruise Control 5.2 build

 Hi Mark,

A couple of photos of the transom showing the extenion for the longer outboad leg [25in], with a bit more sanding I will be ready to put some high build on and paint.
Regards
Tony

 

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If youd like to see more of Tonys Cruise Control 5.2 build, please visit of BoatBuilding Forum

To see more of the Cruise Control 5.2 design or more of our range of designs,  please visit our website
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Kens Mushulu 14 
Gday all,

In the last couple of nights Ive got the front seat/storage in and cut out the transom.

It looking more like a boat with everything Im doing now.

My son & I will turn it over on the weekend, so I can glass the outside of the hull.
regards
Ken

If youd like to see more of Kens Mushulu 14, please visit of BoatBuilding Forum

To see more of the Mushulu 14 design or more of our range of designs, please visit our website
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Grahams SporzMaster 19

Hi,

Heres a few more pictures.
I am fitting a 12 v windlass hence the change of access to anchor well. If it plays up I will be able to stow the rope from inboard making it safer.

The floors will be of Paulowina 14mm and the front 2 deck soles are ready for glassing and stiffening the undersides.

I was able to organise the scuppers using 45 degree fittings you need 400 mm + between Station 11 and the transom to fit and glass them.

Picked up a Suzuki 140 hp 2 stroke for a steal (22 Hours on the clock) so if you see a BLONDE Headed !!! geriatric hooning at 45 knots + that’s me.

Cheers

Graham
To see more of Grahams SportzMaster 19, please visit of BoatBuilding Forum

To see more of the SportzMaster 19 design or more of our range of designs, please visit our website




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Mathews Mushulu 14
G’day.
All done!

When I painted the floor white it made the area look so much bigger. The mod’s worked out how I’d pictured it in my mind – very happy with the end result.
 
Not sure if I want to put forward steering - I like the idea of ‘floor space’.
Anyway, happy building, boating and fishing everyone.
 
Kind regards,
Mat.
 

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If youd like to see more of Mathews Mushulu 14, please visit of BoatBuilding Forum

To see more of the Mushulu 14 design or more of our range of designs, please visit our website
       





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Pontoon Boat Plans | THE MOST BEAUTIFUL WEATHER FORECAST

Pontoon Boat Plans

You can zoom to any place. Enjoy ;-) 
https://www.windyty.com/?surface,wind,2015-01-11-18,46.286,-13.535,5

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Boat Plans Butler | ARMEL ON FOILS ON THE NEXT VENDEE GLOBE

Boat Plans Butler

Lots of talk about the possibility of IMOCA using foils. I had posted about that here but now it is not just talk but real. The new Banque Populaire VIII, Armels boat will be sailing on foils. The IMOCA class, now that the VOR  passed to one class boats, is the development center of offshore racing monohull. It has been so on the past and it continues to be on the present.

The idea is not using the foils to fly as one the Americas cup catamarans but to create a lot of lift and take the boat more out of the water diminishing apparently its weight. As you can see on the movie they have been testing actively the system using a mini and Armel talks about 60% advantages versus 20% disadvantages. The design is from Verdier/VPLP and the boat will be on the water 2 or three months from now. They work fast in France. I am really impressed ;-)
Some interesting considerations by Armel and VPLP:

Armel Le Cléac’h:

“We went for VPLP/ Verdier because of their skill and they were nearby, as we needed to be in touch all the time. Their boats perform well and have always evolved. Banque Populaire wanted to work with a French yard, French craftsmen so we went for CDK. Once again, we can take advantage of them being close to us. .. The designers showed us the new features for the hull on which they had been working. Work began on the mold a year ago or eight months after the start of the project.

The major innovation is the arrival of foils. The designers suggested these after the experiments in the America’s Cup and in sailing in general, where foils are becoming more and more common. The idea was to use these new technologies to take the weight off the hull at certain speeds and to allow acceleration. We did a lot of work with the research team and the designers, an the whole of the Banque Populaire team. This is a huge challenge, which initially was very theoretical. We decided to carry out experiments with the Team. We chartered Sébastien Picot’s Mini 6,50 N°198 on which we fitted three daggerboards, one traditional one and two with foils to carry out trials from July 2014 under the supervision of Bertrand Pacé, to find out more. It was fascinating. It was complicated to set up and adjust and after a lot of attempts, we had some surprises. We went for one of the two options suggested by the designers. We added the foils to the construction in December.?

I wanted the cockpit to be protected and for the boat to be as dry as possible. These monohulls are usually very wet and you get the full force of the spray and waves. When sailing around the world, it is important to be able to carry out manoeuvres while protected by a sliding cover, with a helm that makes her easy to handle and that is well placed to offer good visibility. Spending a long time at the helm can make all the difference in spite of the efficiency of autopilots, as we saw in the final stretch of the 2012-2013 Vendée Globe.”

Vincent Lauriot-Prévost:

“When the keel is canted windward, the keel blade generates some lift for the boat and to act against the heel, we have the foils making up for the loss of power. We regain the power by generating vertical thrust. The boat is therefore in "air" mode more than the previous generations. It has to correspond to certain angles and forces that we often find in the Vendée Globe, and the result is a huge gain in speed of several knots. The boat will not be more powerful, but will appear to be lighter with a smaller wetted surface as she is raised up by these appendages...Rather than looking for a good all-round performer, we went for a boat that offers gains 60% of the time and slight losses 20% of the time.”

http://www.vendeeglobe.org/en/news/article/14654/armel-le-cleac-h-reveals-his-new-banque-populaire-viii.html

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Canoe Boat Plans | WILD OATS AND COMANCHE GREAT MOVIES

Canoe Boat Plans

Some great movies have appeared recently regarding the two hottest maxis and they deserve to be shared :-)



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