F1technical.net

Mandatory hydrogen fuel cell chase boat

This may be of interest to all the aerophiles

Some performance figures of the hydrogen powered foiling chase boat

Current record is 203 kph, they aim to put +15 kph on thet,
And some good design insights
Sans proofreading

Any comments on pod position?

Related to the first part of the topic
Isnt this fantastic, progress with foils from waterborne skis and boards and much more manageable wings than the original windsurfers



a comparison about half way

KMag having a crack

johnny comelately wrote: ↑

07 Aug 2022, 10:22

Any comments on pod position?

Fascinating thing.

But yes, i'd have a comment:
why aren't they using the horizontal wing in ground effect? At speed, it would give virtually infinite righting moment.

Too unstable? A tilting mechanism could be installed between the wing and the body/sail, to dampen sudden excesses.

Would cause lift induced drag. They apparently get enough of the effect they need with a wheel. The rolling resistance would be trivial compared to aero lift required to keep the lead ballast aloft. They said something like up to 300 kilos in the vid?

vorticism wrote: ↑

09 Sep 2022, 00:45

Would cause lift induced drag.

Sure, but that wing creates some drag even when doing nothing. Basically, wasted energy.
Ideally, you would want to make something with it.
But, yeah, the wasted energy is probably so little that any change in design philosophy wouldn't be worth the effort.

It could still be used to stabilize the vehicle, though. Instead of bleeding off sudden gusts and slamming the pod, you could just increase the aerodynamic righting moment and keep accelerating.

Some interesting aerohydrodynamics on these beauties with their skirts up

it smashed through the 50 knot foil cavitation barrier to break the sailing speed record at 65.45 knots (121.2 km/h) over 500m.
...There are risks of injury, death, drunkenness, and financial hardship involved in sailing...

johnny comelately wrote: ↑

12 Oct 2022, 12:56

it smashed through the 50 knot foil cavitation barrier to break the sailing speed record at 65.45 knots (121.2 km/h) over 500m.
...There are risks of injury, death, drunkenness, and financial hardship involved in sailing...

Wow, that's the very definition of a niche sailing craft. Can only sail in one direction relative to the wind and only then in one place in the world.

Bloody cool, though.

222.4KM/H: Wind Powered World Land Speed World Record Broken