GPH of overdriven yachts!

[zakthor]

A few weeks ago I saw the Canadian navy’s Regina slip past at dusk at 29kts, moved like a cat.

So that’s a big boat going fast but it sure did move with dignity.

I seen some other boats go by, look like a shoe getting dragged through the water. Whole boat tipped back into the hole they make in the water and a giant frothy wave spilling forward of the bow.

I sort of laugh, what the heck is the guy thinking, is he channeling Rodney dangerfield? These are typically 45-55ft things that look like they’re stacked an extra deck taller than they should be, looking top heavy.

Today I saw something 80-90ft long going past. Three full decks so it looked like a wedding cake, all tilted making the most massive wake. Not planing though and not moving well I’d say overdriven, is there another word for that? Violating hull speed for sure at 25kts. The lower forward windows were enclosed in the bow thrash. Epic.

Looked up fuel economy for similar looking boats and apparently takes 1.5-2k hp, so over 200gph? To look like a doofus and save a few minutes?

Sure the wake was large but I’d no idea how crazy it was until I saw the estimated fuel use.

Do folks not know how boats are supposed to move in the water? Don’t they notice that everything is tipped back at a weird angle? Wont the fountain spill? Won’t all the books and glass art fall out onto the inlaid marble floor in the library?

Takes all kinds but this boater subset strikes me as deeply weird.

[masraum]

Interesting observation. I doubt that I'd notice.

The Regina weighs 4000-5000 tons and is 134' long depending upon load.

I just looked up some random 90' yacht. It weighs 90 tons, and is 89' long with a 6'4" draft.

I'm not sure that comparing the way they work in the water is a great comparison. It seems like that would be like comparing the 90' yacht to a bass boat.

[red-beard]

https://silent-yachts.com/

They move at about a max of 8-9 kts.

[zakthor]

Originally Posted by masraum

Interesting observation. I doubt that I'd notice.

The Regina weighs 4000-5000 tons and is 134' long depending upon load.

I just looked up some random 90' yacht. It weighs 90 tons, and is 89' long with a 6'4" draft.

I'm not sure that comparing the way they work in the water is a great comparison. It seems like that would be like comparing the 90' yacht to a bass boat.

Thats only true if you use the standard american metric conversion of 1' == 1m.

Regina is 440' long. It was about 1/2 mile away but to my eyes it was cooking and a very small wake relative to its size. The 29kts was reported at the time from an ais tracking site and who knows if that is correct. But it was beautiful how it slipped through the water.

I think the ugly boat was a sunseeker 90 but it was tipped way back.




There's also some of these that make the hugest wakes:

https://www.yachtingmagazine.com/yachts/viking-90-sky-bridge-reviewed/

Twin 2600hp diesels so fuel consumption could have been even higher.

Looking at the pics there must be a real art to photographing these pigs. They don't look nearly so good in person, probably going a slightly wrong-er speed.

[908/930]

Hopefully our navy will fire whoever is in charge of the HMCS Regina, he had the ship up to 22 knots down the Stuart channel between Salt Spring Island and Vancouver Island about two weeks ago. Sent a 10' high wave out from the ship. Where does our navy find these people.

[masraum]

Originally Posted by zakthor

Thats only true if you use the standard american metric conversion of 1' == 1m.

Regina is 440' long. It was about 1/2 mile away but to my eyes it was cooking and a very small wake relative to its size. The 29kts was reported at the time from an ais tracking site and who knows if that is correct. But it was beautiful how it slipped through the water.

I think the ugly boat was a sunseeker 90 but it was tipped way back.

Funny, when I searched for "90' yacht" what popped up that I looked at was the sunseeker 90.

I think a large military ship is going to be designed very differently with different goals in mind than a pleasure yacht. Take the intended goals, and weight into consideration and I think you'll end up with very different behavior/performance. Kind of like comparing a cesna to an airbus 380.

[zakthor]

Originally Posted by 908/930

Hopefully our navy will fire whoever is in charge of the HMCS Regina, he had the ship up to 22 knots down the Stuart channel between Salt Spring Island and Vancouver Island about two weeks ago. Sent a 10' high wave out from the ship. Where does our navy find these people.

Awesome. Must have been the same transit, i saw her at dusk on san juan channel.



Probably the ais was lying about the 29kts but thats what it said. And that ship was was cooking. The wake wasnt anything compared to what we see during winter storms. Sad thing all that money and crews time and the major op on wikipedia is interdicting hashish traffic in the persian gulf. Was joking they were after some kayakers.

My reason to include regina is that its a big full displacement hull and follows the standard hull speed rules which are dominated by the square of the length.

The big piggy white things cant get on plane so when you exceed the hull speed the power tips the boat up and turns into water froth and the teensiest of extra speed. They probably look ok at 12kts, but nobody puts 5000hp into a boat to go 12kts.

Im not up on yachting vernacular but theres got to be some great names for the guys that overdrive their boats but i guess i can just call them edmontonians sine they all seem to be from canadia.

[908/930]

The 29 Knots is possible, that ship has a lot of HP.

[zakthor]

Oh wow, in contrast look at this passing by right now:




Zodiac, 48m long going 7kts. Woooo.

[pwd72s]

Beautiful! Not much afloat prettier to the eye than an old gaff rigged sailing yacht...

[Jeff Alton]

Nice looking Schooner. She appears to be 38.7M long (48-49 including spar lengths). Built 100 years ago.