Showing posts with label crown cut. Show all posts
Showing posts with label crown cut. Show all posts

May 04, 2022

Oars from Vendia in Holland


Vendia is not only good for Hulls and Interiors, also oar blades for example can be made easily from it. Light and durable, and very pretty on top of that. These blades were made from 6 mm Vendia pine planks at "de boobouwschool" in Holland, one of the oldest and best known boat building schools in Europe. Bert van Baar, one of the teachers at the school was not only happy about the look and feel of Vendia, but also loved the smell. The sliced veneers take varnish very well, as you can see in this picture.


 

April 22, 2022

One happy Customer: Riverboats in Lapland by Seppo Köngäs




Seppo is one of our first Customers and he received his first Vendia boatplanks in January this year. Since then he has been busy, as you can see in these pictures. Not with fishing, the rivers up north are still covered with a thick layer of ice, but with building 4 riverboats that follow the old tradition of boatbuilders up north. Wood is still the best material for these boats, the different forces a boat has to endure in the rapids of the salmon rivers generate high tensions and forces to the hull. The supply with good boatbuilding wood in the north has become very difficult, so Seppo was very happy to hear that Vendia is back. Before this winter Seppo had build 5 boats, one from birch plywood and four from Vendia. Now there is four more. 

This is what Seppo says about working with Vendia:

"I made my first boat from birch plywood. All the following ones are made from Vendia. Vendia became available at that time in 2016 - at least to my knowledge - so that's why I wanted to try it.

For me, the main reason was the look - the Crown Cut pattern is really pretty, and it comes out well especially on river boats where the width of the individual planks is large. On my model, which has a second board in the bow all the way to the batten (so at its widest it's a little under 400 mm), the pattern comes out nicely. Of course, the other boards are wide too - I use 300 and 325 mm boards, with the visible part of the board being 250-300 mm wide.

Another reason - and a significant one - is the thickness of the surface veneer and the neutral colour of the used glue. In the continuation joints, a thick surface veneer forgives a lot - meaning the joint is easy and secure. There is room for sanding. A birch veneer that has been made by turning and the surface veneer still sanded thin is at greater risk of surface veneer bursting. Similarly, birch marine plywood has already been glued at the factory from different veneer sheets, the seams of which will show up as a very dark (dark brown) raw veneer. They cannot be sanded out of sight.

The third reason is the absorption of the impregnant: in thick veneer, the impregnant is absorbed more deeply - than in thinly sanded birch - so I would think it would prevent rotting much better. In birch plywood, the impregnation apparently doesn't get beyond the first layer of glue, so the protection is weaker.

Vendia is probably a bit lighter than birch plywood - at least that's what the finished boat looks like.


As for workability, Vendia is easy to work with - easier than birch. Of course, the finished narrow dimension of the boards makes initial processing easier compared to a 3000x1500mm sheet of plywood. On the other hand, someone may argue that you can save on the total surface area of a large board if you can cut the necessary pieces with a small amount of labour.
Of course, the Vendia then has a limitation in width if you need it: since I haven't had a 400mm wide board with a warp pattern so far, I've had to make a long sideways strake for the bow section on all boats. This is because of my own boat model. That's how I ordered the materials now, so I made a side bridge for all but the last three boats. On the last one I tried to see if I could get the 400mm width enough, and I did - although I had to make 2 longitudinal extensions. Making a longitudinal extension is of course easier in terms of compression as you don't have to fiddle around to get the compression in the middle of the wide board with normal wooden clamps - so no need for different planks and clamping levers.

The bending and positioning on the Vendia is good. Perhaps this is highlighted by the fact that there are fewer transverse veneers - birch has almost the same amount of longitudinal and transverse, so bending may therefore be tighter.

Because of that Crown Cut pattern I've often encountered questions and admirers on the river due to the fact that the boat is made of whole boards, and such wide boards have been used. I have had to show the edge of the "plywood" to make them understand that it is a composite material. They have praised both the material and the boat as pretty - this adds to the joy of reaching the shores. It is an important part of the charm of salmon fishing.

I live in Oulu, but I'm originally from Kittilä at the foot of Levi. I'm still a country boy, and I enjoy fishing and hunting a lot - and nature is important to me anyway. Salmon fishing has brought me more into boats - in the past I was often on the river catching grayling - mainly from the shore, but having lived on the shore I have always had some kind of boat. Fibreglass - easy to maintain as it is, is just not really suitable for salmon fishing."



Here you can find Seppo`s own photo gallery that gives you a good insight into his boatbuilding process. You can also follow Seppo on his facebook account.


March 09, 2015

Sliced veneer vs. peeled veneer

Many people have asked what is the difference between VENDIA marine plank and normal plywood. We will introduce more detailed the differences and features of VENDIA and normal plywood in a separate posting, but today we are introducing the differences in making the veneers. 

The both, VENDIA and normal plywood are made of veneer but the most significant difference is the way how the veneer is cut. VENDIA marine plank is made of sliced veneers whereas plywood is made of peeled veneers. What is the difference between sliced veneer and peeled veneer then?

Photo: hrzn.net

Sliced veneer is made by shaving veneer sheets from the log. By slicing, the grain pattern will remain natural. Also the veneer surface remains unbroken and it doesn’t include small micro-cracks such as in veneer made by peeling. The features of sliced veneer are better than peeled veneer, and therefore it is often used for more demanding purposes. The appearance of the veneer depends on the cutting direction. The face veneers of quarter cut VENDIA marine plank are sliced radially and face veneers of crown cut VENDIA are sliced tangentially. Appearance of radially sliced veneer is straighter and more regular than tangentially sliced veneer.

Surface of the sliced veneer remains unbroken.

Surface of the peeled veneer includes small cracks.

Peeling is cost-effective method to make veneers. When peeling, the log is rotating against a stationary blade. This method produces continuous “rug” of veneer. The veneer is curved and it has to be flattened before using, at the same time causing small micro-cracks on the surface of the veneer. This weakens the longevity and life of the veneer. Also the finishing is more difficult than in sliced veneer. The blade slices through growth rings and then the appearance of the veneer is not so natural than in sliced veneer.

Crown cut VENDIA marine plank.

Quarter cut VENDIA marine plank.

The most significant disadvantages of peeled veneer for boatbuilding are the small micro-cracks. The small micro-cracks of peeled veneer expose the plywood panel to decay fungi. As a result the paint or varnish can be damaged over the time. These small cracks allow also the water absorption to the traditional marine plywood. The most important advantages of sliced veneer for VENDIA marine plank are the beautiful and natural appearance and longevity.

February 01, 2015

The first touch of boatbuilding with VENDIA

VENDIA marine plank has been popular material among boatbuilding courses in Finland. One of the courses was held in Suonenjoki, in Northern Savonia. During last October and November the course had completed seven wooden boats made of VENDIA marine plank. The course lasted a month and the participants made all the boats together. Surface finishing for the boats will be done in the spring when they also will be raffled among the builders. At the beginning of summer the course participants will get to try the new boats to the Savonian lake scenery.




All the seven boats have been made of VENDIA marine plank. The course teacher, Ilmo Koivisto, was the builder of the first boat made of VENDIA. He considered VENDIA as beautiful material and he thought it was easy to work with. That is why he also recommended VENDIA marine plank to the boatbuilding course participants who didn’t already have extensive experience in boatbuilding. All the boats built on this course are Savonian-type, so called Vendace-type boats. There is little American nuance on the keel – it is a bit wider than in traditional Savonian-type boats. The boats are also slightly bigger than normally. The length of the boat is 5.85 meters, while traditional Savonian-type boats have typically length between 5 - 5.5 meters.



Three participants of nine were members of the Suonenjoen Tehdäänitse ry -association. The association organizes a name competition for the boat they made and on the next summer the boat is in common use of the all members of the association.

November 26, 2014

VENDIA sails to the seas

Students of Etelä-Kymenlaakso Vocational College, Paavo Koivisto and Jouko Pohjolainen, are currently building a coastal rowing boat made of VENDIA marine plank. The goal of boatbuilders is to get the boat ready for the Helsinki International Boat Show in February 2015.


Picture from the left, boatbuilding student Jouko Pohjolainen and the teachers Tapio Lindholm and Pasi Hietala.
Koivisto and Pohjolainen are currently building the boat of 12 mm VENDIA marine plank. The boatbuilders are of the opinion that the thinner VENDIA, such as 9 mm would be also suitable for this kind of boat. However, thickness of the marine plank increases the stability of a coastal rowing boat and therefore they decided to go with the 12 mm VENDIA. Experiences of the boatbuilders have been positive. Beautiful appearance and workability came first to mind of Koivisto and Pohjolainen. They also liked the knot-free surface since there is no need to patch up branches like in the normal plank board.


Comments of the boatbuilding teachers from the Etelä-Kymenlaakso Vocational College were also positive. “Good looking material”, said the teachers. According to the teachers high-quality traditional plank boards are very hard to find and VENDIA marine plank is considered as a welcome novelty for wooden boatbuilding. When building a wooden boat it is ideal to find marine planks as long as the boat is. Unfortunately in case of six-meter-long wooden boats this is not possible in most cases. This was a concern of the teachers.

There are two restrictive factors to get the six-meter-long marine plank. First, there isn’t such long slicer in the world. Another limitation is related to the delivery costs. Costs of packaging and transportation of six-meter-long planks would rise up to fivefold compared to three-meter-long packages.



VENDIA marine plank is available in lengths of 2 600 mm and 3 000 mm. Scarf jointing is easy and simple way to lengthen a marine plank. Thanks to VENDIA’s thick face veneer the scarf joint is quite undetectable. From the pictures above you can easily see the appearance of scarf joints when VENDIA marine plank is used.

October 07, 2014

First motorboat made of VENDIA

In early August we introduced a wooden boat made by Boatyard Ruotsalainen from Nurmes, Finland. In late summer Ruotsalainen also built a motorboat of 9 mm VENDIA marine plank. Therefore, VENDIA is also very suitable for building a wooden motorboat.



Boatbuilder Ruotsalainen made his first test runs with this motorboat on 4th August in Pielinen, Finland.





The result is as beautiful as what is used to see in rowing boats made of VENDIA.

September 05, 2014

Launching the first boat

The first boat made of VENDIA marine plank was built at the Ingman College of Crafts and Design in January 2014. The Venla-boat was launched for the first time on August 6th, 2014 in Kuopio, Finland. Paul Hämäläinen, the owner of the new boat was one of the participants. He is also boatbuilder and has finished the surface of the boat. Ilmo Koivisto, builder of this first boat and other interested craftsmen were also present.


They all were excited to test the first boat made of VENDIA marine plank. The participants praised the model of the boat and the lightness of rowing.






August 12, 2014

Experiences of the boatbuilder


Boatyard Ruotsalainen from Nurmes has built wooden boats of VENDIA marine plank among the first boatbuilders in Finland. Ruotsalainen has built wooden boats over 30 years, so he was very interested in this new type of marine plank and he also saw it as a welcome novelty in addition to traditional plywood. Now Ruotsalainen has built two boats of VENDIA marine plank and his experiences have been great. Also his customers have liked the end result and especially they have been taken to the appearance of the marine plank.


Untreated boat.

Fitting of the first plank.
At first glance Ruotsalainen took notice of beautiful and knot-free surface of the marine plank. Also the surface is softer than in birch plywood but tougher than in conifer plywood, compares Ruotsalainen. Raw material used in VENDIA is butt logs from old grown pine. A good quality raw material and sliced veneers make VENDIA beautiful and durable. 

Keel and taffrail.

There is no need to steam VENDIA marine plank but otherwise it reminds processing solid wood. The marine plank bends smoothly as if it understands that the clinker should be tight, tells Ruotsalainen.
Second plank found its place.

It already looks like a boat.
Doing a clinker is similar than working with solid wood. It demands bit accuracy because of the colourless glue. Accuracy is needed when shaving but the neat and beautiful end result will reward both the boatbuilder and the customer.

Bow made of 3 mm sliced pine veneers.
Clamping the bow.

VENDIA bends into the ribs.
According to Ruotsalainen’s experiences finding a good quality material for the ribs have been difficult, so he tried out VENDIA also for the ribs. 12 mm VENDIA is suitable for the ribs but he rather recommends 10,5 mm thick VENDIA only made of lengthwise veneers and lightened from the corners. Rib made of only lengthwise veneers was assertive and springy and it bent smoothly. In VENDIA marine plank crosswise veneers have been designed to prevent cracking but in this case there is no need to worry about cracking because the ribs are so narrow. Ruotsalainen also tried out making the keel and bow using 3 mm plank of sliced pine veneers. Making the keel and bow of sliced veneers succeeded well, says Ruotsalainen.   

Finished wooden boat.
In the picture: Satu Tuovinen
According to Ruotsalainen, wooden boats made of pine have always been long-lived, so he predicts long life and durability also for boats made of VENDIA marine plank.