Lumber time!

Situatiuon with lumber is very tight. I wanted to make sure that I am the first one to put my hands on fresh delivery. 

Best runner planks start with best lumber.  Therefore I always show up with my own scale. I weight every board and caclulate density.  Te goal is to pick up the lightest wood. Lightest boards are used for planks for very light sailors. In other words low density wood allows more glass reinforcement. This is critical for all saliors below 75kg.

Lumber
Lumber for runner planks

For my runner plank projects I use samba wood (AKA abachi).  The lightest plank core I’ve ever made was 2,35kg and heaviest was almost 5kg! In average core before infusion weights 3,5-3,7kg. That’s quie a difference and careful selection makes a lot of sense. 

Secret 3M adhesive film revealed!

My first DN Tech Talk was about shimming runners. I used 2 different double sided tapes. One of them was very special because of thickness. I received a lot of questions about what type of tape it was and I was not able to answer them because simply it was not written. Now I had to reorder this product again and the name is there!!! The magic product is 3M 467MP. If fact it is not double sided tape because double sided tape is core material covered with ahesive film on both sides.  467MP is adhesive film, no core. Therefore it is 0.05mm in thickness only!

3M 467MP adhesive film for ultra thin shims

Preps for Swedish Championship 2022

I am going to say good bye to 2021-2022 season in Swedish Championship. There is no more sailable ice in Poland and the only opportunity to enjoy icesailing and racing is in Sweden next weekend. 

If you thought that there is no motivation to sail in last event of the season you are very wrong.  I am working on my runner program to change couple of things. Main goal is to apply shorter crown to most of my runners. 

This picture was taken on our way back from Worlds/Europeans. This was first stop overnight at random parking in Sweden. We cooled down runners in snow to measure Robert’s winning runners and compare them with mine. 

We measured couple of other sets as well. The conclusion was simple: I have to shorten the crown on some of my runners down to max 20in. And I completed this today.  Waiting for ferry on Wednesday.

Polish Championship 2022

Going to regatta I had a clear plan in mind as the weather forecasts was also black and white. Both racing days were supposed to be sailed in a very strong breeze gusting up to 30kts on day one and decreasing to 24 on Sunday. -4C in the night and slightly above 0 during the day. So very windy and hard. And bumpy. Already in Gdansk I decided to prepare my stiff setup: use a very stiff mast and stiff plank. I knew I can squeeze impressive speed out of this combination with help of my 92kg.

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Lake Siemianowka again

Very wet sailing last weekend. We had only 3 races on Saturday. RC discovered dangerous spots on the ice and racing was cancelled. Night cold didn’t improve the situation and Sunday was no sailing.

I made another improvement to my boat trim and I could feel a little difference. I need to work on my back up plank to make it softer down to 48mm. I want the plank to take more load and let my soft mast breath a little more 😉

Next weekend: Polish Champs. For sure not in Poland. If it happens than lake Rekyva in Lithuania is the place.

Estonian Nationals fail

We’ve been studying weather forecasts for days to find out if it makes sense to go to Estonia or Sweden. Wind forecast eliminated Sweden and we were left with one option only. Thursday afternoon we decided to risk and go. Travel started late afternoon with intention to drive non stop all the way to Haapsalu. Total 12 hrs. But before Polish – Lithuanian border heavy snow storm started and we could not continue our journey. We decided to stay in hotel in Suwalki and wait for weather update from C6. At 6AM Vaiko texted that it makes no sense to travel because of snow. We had breakfast, coffee and started trip back. I guess it was minimal price to pay to this fail. Now waiting for the weather to clear up in Poland. There is ice and there is snow. 60% chance to sail on lake Sniardwy next days.

Polish Fleet Cup, Siemianówka, January 2022

Long awaited moment has come! First regatta in Poland with 40 DNs on the starting line happened on lake Siemianówka.

Crazy Saturday with wind up to 38kt in gusts. One race started in 30kt+ breeze on hard black ice! It was insaine! My GPS showed 110km/h in race mode! This doesn’t happen too often. Sailing was really on the edge.

We had 5 very challanging races. And quite substantial number of equipment fails. Two masts were broken in race #1.

I was having very hard time to sail fast. Mainly because I messed with sails and my flat sail stayed at home. Instead I had two FO1s with me;)  On black ice and strong wind no chance to compete with top guys.

Day two offered three races. First in strong breeze but the other two in 6-10kt. At this point everything was working fine and speed was there. 

Now time to re-sharpen my runners and regroup before next stop on the way to the  Worlds.

Practice weekend in Lithuania

As we struggle to sail in Poland I decided to go with Robert to Sweden for practice, R1 and R2. We had some doubts about wheather forecasts but nevertheless we booked a ferry to Karlskrona.  Same day a message popped out that lake Rekyva in Lithuania has reasonable ice and good wind forecast.  We rebooked fery for March SM and went to Rekyva. Forecast was right. We had great 3 days of sailing.  100km+ each day. 

25 Polish sailors showed up that weekend! 

Here is short footage:

Dynamic plank measurements

In my practice sailing in Żnin I was testing two full carbon masts. One each day. Both seem to be on a soft end of the range. My feeling was that my plank has a lot to do with how the mast performs.  When I studied my action cam recordings I felt I need to make dynamic load measurements of the plank.  This measurement was done last time long time ago so I had to find all accessories hidden in the boxes covered by dust. 

DN runner plank dynamic load measurement
DN runner plank dynamic load measurement

The setup is very simple. One important notice: apply tension/load with system built of non-stretchy materials. In my case steel cable connected to hunters’ digital scale and to dyneema wrapped around the plank.  

I used headstay adjuster to precisely apply load. The laser range finder fixed to the tripod was delivering precise continuous reading of deflection. Reading of deflection was taken after every 10kg load added from 0 to 120kg. 

Simple graph below shows interesting results:

DN plank dynamic deflection chart
DN plank dynamic deflection chart

Orage represents the plank that I was using for testing the masts. In some load range it is up to 10% stiffer than the other plank. I think I found the answer to my question. I should go with blue plank instead of orange.

Practice on lake Zninskie Duze, central Poland

It was a great surprice to everyone to open the season on lake Zninskie Duze in central Poland.  We enjoyed three days of sailing and hopefuly we will get one more tomorrow.

Finally full carbon masts got a chance to show their potential. I used the softest and stiffest one. There was not much to work on when it comes to fine tuning my boat as my current trim was almost perfect. More testing to come soon.