[DUMBGRUNT]

Soon Mr Musk will incorporate this and increase miles traveled on a charging.

[taterjay]

Oh no, settled science is being messed with again.

[BitWielder1]

This problem kept me awake at night.

[rdl6989]

“Fuel consumption can double if the vessel is traveling downstream compared to upstream,” Ellingsen said.

Huh?

[Bob434]

Finally, FINALLY! I can sleep- Phew- i was getting exhausted-

[rightwingcrazy]

“Physics Riddle”

Q: How many theoretical physicists does it take to change a light bulb?

A: Two. One to hold the bulb and one to rotate space.

[for-q-clinton]

I can’t believe this was an issue. They just now figured out that currents can impact the wave. I must be missing something but this sounds too basic based on what I just read. Maybe the author doesn’t really understand what he wrote about so it’s not clear.

[dfwgator]

How many licks does it take to get to the middle of a Tootsie Pop?

[ProtectOurFreedom]

"Seeing the [wake] pictures appear on the computer screen was the best day at work I've ever had," says Simen Ådnøy Ellingsen

Whatever floats your boat, Simen.

[Augie]

Oh good grief. Anyone that has spent even the slightest amount of time on the water would recognize those simple facts. But, it took an associate professor and two students to prove it?

PhD = Piled Higher and Deeper

[Dr. Sivana]

It took the genius of people like Cauchy, Poisson and Kelvin to solve these wave problems for the first time

It figures that someone with a name like poisson would no something about things moving in the water.

[Leaning Right]

> It has long been assumed that the angle of the v-shaped wake behind a boat should always be just below 39 degrees <

I have been working on this problem unsuccessfully for years. And just now I understand where I went wrong. I was studying the wake behind a boot.

[LibWhacker]

Wow, never heard of this riddle before, thanks.

[left that other site]

But Capt'n

[bankwalker]

If a man drank a quart of buttermilk before he started ...
and ran a mile before he farted ...
and the faster he runs the farther he gets ...
how far will he run before he sh!ts?

[chief lee runamok]

"It has long been assumed that the angle of the v-shaped wake behind a boat should always be just below 39 degrees..

This is an issue I pondered on during the many hours on aft watch.

[marktwain]

From the article:

"Fuel consumption can double if the vessel is traveling downstream compared to upstream," Ellingsen said.

I suspect that is a serious oversimplification. They probably mean, fuel consumption per distance covered in the flow can be double when the vessel is traveling down stream instead of upstream.

Obviously, fuel consumption per distance referenced to fixed points, is less going downstream than upstream.

You can achieve infinite fuel consumption going upstream, simply by hold the speed of the boat in the flow to the speed of the current. From the bank, the boat will not be moving, but it will be consuming fuel.

Your fuel consumption going downstream can be zero, simply by turning off the engine. You still travel downstream, and do not consume fuel.

[IronJack]

Nowhere does it explain how they came up with 39 degrees. And shouldn’t it be a function of the boat’s speed and shape?

[Ouchthatonehurt]

[Redwood71]

I’ll have to inform my duck.

rwood

[bunkerhill7]

The wake you make falls mainly in the lake.