Spinning wheel under water. Which direction does it go?

[moonbogg]

Does it go straight as if on land? Does it go perpendicular to its axis of rotation like a boat prop? Does it go nowhere? I say it goes nowhere.

 

[waffleironhead]

Not enough information to answer.

 

[rudder]

Is it on a treadmill?

 

[Vdubchaos]

Depends on the design of the wheel. If it has no spokes, it won't propel anything.

If it has spokes, it will propel.......as for direction, it will make the object spin in circles (unless there is rudder involved).

 

[edro]

Depends on wheel and tread design.

 

[moonbogg]

I've seen cars that can go in water. They drive in water and the wheels look submerged. I don't see how the wheels provide forward motion if completely submerged.

 

[BoomerD]

Spinnin wheel got to go round...


https://www.youtube.com/watch?v=qi9sLkyhhlE

 

[Strk]

Well, considering this is basically what a tidal generator is, I suppose there's your answer.

 

[SMOGZINN]

I've seen cars that can go in water. They drive in water and the wheels look submerged. I don't see how the wheels provide forward motion if completely submerged.

Unless the car if floating they move forward because the wheels are still getting traction on the ground. If the car is floating, then the wheels do nothing but spin.

A few very special cars were made that had propellers under them that power could be switched to to move the car in water, but for the most part those cars were novelty items and not very useful.

Cars don't run well in water, unless it has a snorkel attachment as soon as the air intake is covered the engine sucks water and dies.

 

[edro]

Cars don't run well in water, unless it has a snorkel attachment as soon as the air intake is covered the engine sucks water and dies.

That is absolutely false.
Hybrids exhaust water, so it must be good for them to drink as well.
Checkmate!

 

[sdifox]

Whichever way the water flows

 

[Fern]

If it's completely submerged it'll probably go nowhere. If it's only partially submerged it'll go forward (or backward) like a paddle wheel boat.

Fern

 

[Rakehellion]

No gym for home, work out floor with 30, but is it for 20 like 30 lb when you no lift it to be for men, for 30 lbs instead? or half is 10 for 20 pounds?

 

[MagnusTheBrewer]

Initially, opposite the direction it's spinning and slightly perpendicular following the 'right hand rule.'

 

[tynopik]

If it's completely submerged it'll probably go nowhere. If it's only partially submerged it'll go forward (or backward) like a paddle wheel boat.

that was initially my thought, but then I wondered if the (very) slight density gradient might help a wheel move 'forward' even if completely submerged

 

[Puppies04]

It goes down.

 

[Blackjack200]

Does it go straight as if on land? Does it go perpendicular to its axis of rotation like a boat prop? Does it go nowhere? I say it goes nowhere.

A boat "prop", short for propeller, drives a boat forward because its blades act as hydrofoils.

http://en.wikipedia.org/wiki/Propeller

Depends on the design of the wheel. If it has no spokes, it won't propel anything.

If it has spokes, it will propel.......as for direction, it will make the object spin in circles (unless there is rudder involved).

WTF, it has nothing to do with spokes, but you are blind-squirrel-finding-a-nut correct about the boat going in circles. If the boat has no steerage, gyroscopic precession will tend to make it go in a circle.

 

[Humpy]

On Earth, everything is under water.

 

[mmntech]

If the car is floating, the tires will act like paddle wheels on a boat. Though it's a very inefficient way to power an amphibious vehicle. You could literally swim faster. If the car is sinking, what the hell are you doing?! Get out!

Amphibious vehicles all use a secondary propulsion system when in the water. Either a conventional prop, or a jet similar to a SeaDoo.

 

[n7]

Is it on a treadmill?

:awe: :biggrin:

 

[Howard]

How are you guys even understanding the question?

 

[Captante]

Is it on a treadmill?

It takes off damnit!!!!!

 

[IronWing]

How are you guys even understanding the question?

We are experienced moonbogg readers.

 

[DrPizza]

I'm on a 3 minute break, and don't think I can be certain of my answer in 3 minutes. Some thoughts that mig
ht be considered for a solution:
gyroscopic precession
pressure in water increases with depth
Feynman sprinkler
If there is a slight amount of movement initially, then could the treads on any tire act like the dimples of a golf ball, causing a difference in pressure depending on the direction of spin?

Is this wheel neutrally buoyant though? My other canned response is, "it'll go up. Wheels with inflated tires float." At least, I think they do.

 

[who?]

That is absolutely false.
Hybrids exhaust water, so it must be good for them to drink as well.
Checkmate!

Hydrogen powered cars exhaust water. Whenever you burn a hydrocarbon fuel hydrogen from the hydrocarbon bonds with oxygen from the air to make water. After you have started your car you may see it dripping from the exhaust pipe until the exhaust system heats up enough for it to come out as steam. Contrails are new water that is made in jet engines as hydrogen from the jet fuel bonds with oxygen from the air in the combustion reaction.