3 ms·

"The thing that blew my mind, and continues to, is that the top speed you can reach is dependant upon the length of the boat and not the weight" Is there a sim

"The thing that blew my mind, and continues to, is that the top speed you can reach is dependant upon the length of the boat and not the weight" Is there a simple explanation for this to share?

leetcrew 4y ago
you might find this video helpful: https://www.youtube.com/watch?v=URgSFglbl5g https://www.youtube.com/watch?v=URgSFglbl5g
gerdesj 4y ago
Longer => greater surface area in contact with the water. Friction and stiction due to area is a greater killer of speed than weight, which will only put you a bit lower in the water. It is obviously a lot more complicated than that. Enough weight will sink you and more length will slow your descent to the depths a bit. Greater weight will increase inertia so acceleration will take a hit. Depending on how the weight is distributed you risk turn over due to your meta centre being in the wrong place in relation to your centre of gravity.
- closewith 4y ago
  > Longer => greater surface area in contact with the water. >Friction and stiction due to area is a greater killer of speed than weight, which will only put you a bit lower in the water. The opposite is true. The longer a hull, the faster a displacement vessel can travel. Here's an MIT explanation: https://engineering.mit.edu/engage/ask-an-engineer/what-is-the-relationship-between-the-length-of-a-boat-and-its-maximum-speed/ https://engineering.mit.edu/engage/ask-an-engineer/what-is-t...
mhandley 4y ago
As a boat moves through the water it creates a bow wave. The wavelength (ie crest to crest) of the bow wave increases with boat speed. Once the wavelength of the bow wave equals the hull length, the boat will start climbing the front of the bow wave and will be sailing up hill. Unless you've got a lot of power and can climb on top of the bow wave and plane, this is the maximum hull speed.
- sprkwd 4y ago
  Best explanation I have ever read for that.

"The thing that blew my mind, and continues to, is that the top speed you can reach is dependant upon the length of the boat and not the weight" Is there a simple explanation for this to share?

leetcrew 4y ago

you might find this video helpful: https://www.youtube.com/watch?v=URgSFglbl5g https://www.youtube.com/watch?v=URgSFglbl5g

gerdesj 4y ago

Longer => greater surface area in contact with the water. Friction and stiction due to area is a greater killer of speed than weight, which will only put you a bit lower in the water. It is obviously a lot more complicated than that. Enough weight will sink you and more length will slow your descent to the depths a bit. Greater weight will increase inertia so acceleration will take a hit. Depending on how the weight is distributed you risk turn over due to your meta centre being in the wrong place in relation to your centre of gravity.

closewith 4y ago
> Longer => greater surface area in contact with the water. >Friction and stiction due to area is a greater killer of speed than weight, which will only put you a bit lower in the water. The opposite is true. The longer a hull, the faster a displacement vessel can travel. Here's an MIT explanation: https://engineering.mit.edu/engage/ask-an-engineer/what-is-the-relationship-between-the-length-of-a-boat-and-its-maximum-speed/ https://engineering.mit.edu/engage/ask-an-engineer/what-is-t...

mhandley 4y ago

As a boat moves through the water it creates a bow wave. The wavelength (ie crest to crest) of the bow wave increases with boat speed. Once the wavelength of the bow wave equals the hull length, the boat will start climbing the front of the bow wave and will be sailing up hill. Unless you've got a lot of power and can climb on top of the bow wave and plane, this is the maximum hull speed.

sprkwd 4y ago
Best explanation I have ever read for that.