A New Ghost in the Machine: AI Designs a DN Plank

by | Nov 17, 2025 | 2025-2026, DN, Home Page

Iceboating has seen its share of firsts, and this may be another one. In the 1930s the stern-steerer DEBUTANTE showed up with the first aluminum runners, and Chuck Kotovic Jr. won the 1954 ISA with one of the first Dacron sails.

Now a new kind of experiment is underway. Tomasz Zakrzewski, a Polish DN sailor who has raced many championships on our lakes, has built what may be the first runner plank designed entirely by artificial intelligence. It was not a shortcut. Tomasz spent hours feeding the system with detailed files and measurements to train it. With enough data, the machine can analyze patterns and generate something that has never been built before.

This week marks a milestone for me — and possibly a first in the history of iceboating.

I have just finished building a runner plank designed entirely by artificial intelligence.

Over the past days, I trained an AI model by feeding it detailed information about more than 100 runner planks built over the last decade — including materials used, layup schedules, structural failures, stiffness measurements, field results, and performance notes. Based on this dataset, ChatGPT proposed its own optimized layup concept… and the design was so interesting that I decided to build it. Continue reading.

C-Skeeter Polish Championship

by | Jan 17, 2023 | 2022-2023, DN, Home Page, ISA


The Western Region of the DN Class (WI, MN, IL, IA, IN, UP of MI) is hosting the DN World & North American Championship in just a few days. Ice sailors from Poland and Sweden are here to train on Lake Kegonsa. The regatta site information will be announced on January 18, 2023, on idniyra.org. Regatta information.

Boat preparations are underway for the first-ever C-Skeeter Polish Match Racing Championship. Current DN World Champion, Robert Graczyk, will face off with former DN World Champion, Tomek Zakrzewski, on Lake Kegonsa in Stoughton, Wisconsin this Wednesday, January 18. Weather permitting, of course. At stake is a meal of Polish delicacies including pirogies and Polish sausage. But none of that cold soup. The loser will treat the winner and the boat owners/race committee at the prize giving ceremony, which will take place sometime during the ‘23 DN Worlds/North Americans.

To date, only the Black Ice/Loren ipsum camp has responded to requests for information about boat prep. The Drifter camp remains shielded under a cloak of secrecy, no doubt working on another traveler-like innovation to create an unfair advantage.

To make sure the race track is level, the two competitors will trade boats after each race, and the championship will conclude after an even number of races. Clearly the Drifter camp strategists have failed to read the Notice of Race and Sailing Instructions.

Picture of the Week

by | Dec 20, 2021 | 2021-2022, DN, Home Page

Through the Harken Looking Glass…

Polish DN sailor Tomasz Zakrzewski P55 shot this clever photo at the Swedish DN Championship which was held over the weekend (December 18-19, 2021) on Lake Ymsen. Tomek placed 4th in a very competitive field. Results here.

DN Tech Talk: Gluing Chocks

by | Oct 11, 2020 | 2020-2021, DN, Home Page

Previous: Shimming Runners
Polish DNer Tomek Zakrzewski’s is back with another instructional Youtube video.

One of the ways to glue chocks to the runner plank using simple jig and MMA adhesive. Building ice sailing gears can be easier when we learn one from the other.

DN Tech Talk: Shimming Runners

by | Sep 9, 2020 | 2020-2021, DN, Home Page

When ice sailors, whether they own a Nite, DN, Skeeter, Renegade, Stern Steer, etc. get together, a compulsory topic of conversation is runners – how to sharpen and align them. Polish DNer Tomek Zakrzewski’s video breaks down DN shimming.