|Feadship | 118.9M | Hull 821 | 2023/4 |

Excited for this one! Feadship usually never disappoints. Hopefully soon more photos will be released.

That is a significant difference!

Nice videos! Probably be another year or two before we see her complete and ready for sea trials.

Owner must be an old Italian woman...

Beautiful yacht.

What a gorgeous yacht. Hopefully we'll see her interior since she is for sale.

It will be quite interesting to compare Feadship's fuel-cell implementation with the Lürssen Approach.

Feadship's Project 821 stores hydrogen for the fuel cell as compressed liquid in cryogenic fuel tanks. The press release emphasizes the significant space requirement for storing hydrogen, which is reportedly "eight to ten times more space than the energy equivalent in diesel fuel."
On the other hand, Lürssen, in their project marketing for the research collaboration with Freudenberg and the first implementation on Project Cosmos, stated that directly storing hydrogen in pure form is "not practical on a yacht." They advocate for storing Methanol in structural tanks as a more viable option. Feadship's press release on Project 821 also hints at future innovations, mentioning onboard reforming of methanol to hydrogen, indicating flexibility. They noted, "the fuel cells developed for Project 821 can also use easier-to-store methanol."

Both Project 821 and Project Cosmos share similar overall length and gross tonnage, so it not would be very interesting to compare the size and power of both installations and see how each approach performs in real-world usage. The claimed performance of Project 821 fuel-cell is „an entire week's worth of silent operation at anchor or navigating emission-free at 10 knots while leaving harbours or cruising in protected marine zones“, while Lürssen claims for Project Cosmos „more than fifteen days at anchor or cruise more than a 1000 miles“.