Great work as usual and yes pictures look very good.

Great work!
 

That Fountain will soon be too pretty for diesel power.

do you mean I should change to turbines🤪 I have think that years earlier before Transmash

Turbines?

After all that work on the boat?

There is no more glorious way to burn a powerboat down to the waterline than turbine power.

But, yeah, once you have the diesel fully tuned, it will be a suitable next challenge.

That was a yoke, they burn so much fuel that I can't do that. 40% of full throttle just idle. I like Transmash power day that work like it desinged, 2500-3000hp max power, 2000hp continious, 1.2liter/km/60knot if my calculation is true

No go.
The total weight will probably be over 10,000 pounds, and to reach 67 mph you’ll need at least 800 hp. Even if you have a large and efficient diesel engine, I think it would be a very good result if you manage to get close to a consumption of 2 liters per kilometer.

But if you’re right, that would be an exceptional result.

Diesel fuel consumption
 

Diesel engines usually get quite thirsty when they are revved.

A friend of a friend who was an engineer at one of the top diesel engine manufacturers in the world, and whose engine building skill match Kari’s fiberglass skills, put a pair of diesels in a Nor-Tech. It was a fun project, but the boat was not very fast and the fuel consumption was high.

I won’t go into details, but a gasoline engine is significantly more fuel-hungry than a diesel when they are not fully loaded.

As soon as both engines operate above the region of maximum torque, the situation changes quite a bit. The diesel still burns fewer liters of fuel, but the difference is no longer large. With comparable technology, in the upper operating range they have almost the same mass fuel flow. Since diesel fuel is denser than gasoline, the diesel consumes fewer liters. In this operating regime, the difference in fuel consumption in liters is under 15%.

Okay, compression helps a bit as well, but not nearly as much as it might seem at first glance.

Since BB engines are not exactly a textbook example of efficiency, this setup will of course consume significantly less, but I would find it hard to believe it could go below 2 L/km. Even that figure is, in my opinion, fantastic.


It would be a shame to clutter this nice thread with predictions, so I’m rooting for you to be right—and to manage to confirm it in practice later this summer.

Don’t listen to this nonsense, ksalmine. A lot of the coolest boats I’ve seen and heard are diesels. Roll that coal! Fack, put a steam engine in it if you want, that boat is going to be awesome.

It is quite bold to assume that a Russian tank engine is a textbook example of fuel efficiency.