# Build Logs & Projects
**URL:** https://solarboats.discourse.group/c/build-logs-projects/11.md
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## [About the Build Logs & Projects category](https://solarboats.discourse.group/t/about-the-build-logs-projects-category/13)
**Author:** [@Sandith](https://solarboats.discourse.group/u/Sandith)\
**Replies:** 0\
**Last updated:** [October 14, 2026, 6:12pm UTC](https://solarboats.discourse.group/t/about-the-build-logs-projects-category/13 "2026-10-14T18:12:56Z")
Show your boat. Follow projects from first sketch through build to sea trials, and learn from what worked and what didn’t. One can share the csv files if they want to share their project info to others What belongs her…
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## [China Zorilla - The World's ;largest electric ferry](https://solarboats.discourse.group/t/china-zorilla-the-worlds-largest-electric-ferry/21)
**Author:** [@Sandith](https://solarboats.discourse.group/u/Sandith)\
**Replies:** 2\
**Last updated:** [October 25, 2026, 4:59pm UTC](https://solarboats.discourse.group/t/china-zorilla-the-worlds-largest-electric-ferry/21 "2026-10-25T16:59:40Z")
Based on the information available in public domain the data is entered and the file created. The summary of inputs are as follows: Speed - 25 knots Power @25 knots - 16,000 kW Total Power - 19,200 kW Battery size - …
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## [100 Pax Ferry - From Speed vs Resistance to Economics](https://solarboats.discourse.group/t/100-pax-ferry-from-speed-vs-resistance-to-economics/16)
**Author:** [@Sandith](https://solarboats.discourse.group/u/Sandith)\
**Replies:** 1\
**Last updated:** [October 16, 2026, 5:29pm UTC](https://solarboats.discourse.group/t/100-pax-ferry-from-speed-vs-resistance-to-economics/16 "2026-10-16T17:29:57Z")
This file is for a 100 pax solar ferry where start from the speed versus resistance that is obtained from CFD and build the speed-power using assumed QPC of propeller and go to the system design nd economics based on spe…