The "fan boat on a river" question

Spexxvet · 12-08-2006, 03:58 PM

If you were driving a fan boat, whose maximum speed was 100mph, up river, and the river was flowing at 100mph, would the fan boat take off.... I mean move forward in relation to the banks of said river?

Flint · 12-08-2006, 04:01 PM

big wheeel keep on toinin'

busterb · 12-08-2006, 04:16 PM

Why to post in home base and not Nothing???

Flint · 12-08-2006, 04:20 PM

oooooo busterb is gonna open a can of whup-ass on this wrong-forum-postin' muthafucka!

LabRat · 12-08-2006, 04:21 PM

footfootfoot · 12-08-2006, 05:18 PM

Quote:

Originally Posted by Flint

oooooo busterb is gonna open a can of whup-ass on this wrong-forum-postin' muthafucka!

I'm gonna have to tagline that one.

tw · 12-08-2006, 06:57 PM

Quote:

Originally Posted by Spexxvet

If you were driving a fan boat, whose maximum speed was 100mph, up river, and the river was flowing at 100mph, would the fan boat take off.... I mean move forward in relation to the banks of said river?

Exact same answer as it the airplane on a treadmill IF airboat has no drag and air is not moving (relative to river bank). At 100 MPH, water excerts drag even on an airboat. Therefore airboat will do something less than 100 MPH in relation to air and river bank.

Now if airboat was going downriver, then airboat would do 100 MPH relative to air and river bank because water (moving at same velocity which means same speed and same direction) exerts no drag on the boat.

Spexxvet · 12-09-2006, 09:44 AM

Quote:

Originally Posted by busterb

Why to post in home base and not Nothing???

To post in home base and not to Nothing because home is where to plane thread be and boat thread be similar to nature. It belong in home. It do.

Griff · 12-09-2006, 05:50 PM

place the fan in front of the boat and you get lift... behind the boat you gots nada.

Urbane Guerrilla · 12-10-2006, 08:59 PM

It would do 100 mph downriver only with the engine off. If the airboat starts putting energy into this dynamic system, at full stretch you get 200 mph relative to the riverbank -- before air and water drag rises enough to hold the boat at 100 mph relative to its immediate surroundings.

Spexxvet · 12-11-2006, 04:15 PM

We're talking up-river here.

Urbane Guerrilla · 12-12-2006, 07:55 PM

Tw wasn't; blame him. I often do.

xoxoxoBruce · 12-12-2006, 09:03 PM

Quote:

Originally Posted by Spexxvet

We're talking up-river here.

You sure it's not off the wall?

Urbane Guerrilla · 12-13-2006, 10:52 PM

Depends on if you can steer the #@%! boat.

12-13-2006, 10:58 PM

Yes, because the boat does not have full drag on the river, it glides over it.
It will maneuver just fine against the current.
The term is Airboat.

12-08-2006, 03:58 PM	#1
Spexxvet Makes some feel uncomfortable Join Date: Dec 2005 Posts: 10,346	The "fan boat on a river" question If you were driving a fan boat, whose maximum speed was 100mph, up river, and the river was flowing at 100mph, would the fan boat take off.... I mean move forward in relation to the banks of said river? __________________ "I'm certainly free, nay compelled, to spread the gospel of Spex. " - xoxoxoBruce

12-08-2006, 04:01 PM	#2
Flint Snowflake Join Date: Mar 2006 Location: Dystopia Posts: 13,136	big wheeel keep on toinin' __________________ **************** There's a level of facility that everyone needs to accomplish, and from there it's a matter of deciding for yourself how important ultra-facility is to your expression. ... I found, like Joseph Campbell said, if you just follow whatever gives you a little joy or excitement or awe, then you're on the right track. . . . . . . . . . . . . . . . . . . . . . . . . . . Terry Bozzio**

12-08-2006, 04:16 PM	#3
busterb NSABFD Join Date: Jul 2004 Location: MS. usa Posts: 3,908	Why to post in home base and not Nothing??? __________________ I've haven't left very deep footprints in the sands of time. But, boy I've left a bunch.

12-08-2006, 04:20 PM	#4
Flint Snowflake Join Date: Mar 2006 Location: Dystopia Posts: 13,136	oooooo busterb is gonna open a can of whup-ass on this wrong-forum-postin' muthafucka! __________________ **************** There's a level of facility that everyone needs to accomplish, and from there it's a matter of deciding for yourself how important ultra-facility is to your expression. ... I found, like Joseph Campbell said, if you just follow whatever gives you a little joy or excitement or awe, then you're on the right track. . . . . . . . . . . . . . . . . . . . . . . . . . . Terry Bozzio**

12-08-2006, 04:21 PM	#5
LabRat twatfaced two legged bumhole Join Date: Jun 2004 Posts: 3,143	__________________ Strength does not come from how much weight you can lift, or how many miles you can run. It comes from knowing that you set a goal, and rose to the challenge. Strength comes from within.

12-09-2006, 05:50 PM	#9
Griff still says videotape Join Date: Feb 2001 Posts: 26,813	place the fan in front of the boat and you get lift... behind the boat you gots nada. __________________ If you would only recognize that life is hard, things would be so much easier for you. - Louis D. Brandeis

12-10-2006, 08:59 PM	#10
Urbane Guerrilla Person who doesn't update the user title Join Date: Jul 2002 Location: Southern California Posts: 6,674	It would do 100 mph downriver only with the engine off. If the airboat starts putting energy into this dynamic system, at full stretch you get 200 mph relative to the riverbank -- before air and water drag rises enough to hold the boat at 100 mph relative to its immediate surroundings. __________________ Wanna stop school shootings? End Gun-Free Zones, of course.

12-11-2006, 04:15 PM	#11
Spexxvet Makes some feel uncomfortable Join Date: Dec 2005 Posts: 10,346	We're talking up-river here. __________________ "I'm certainly free, nay compelled, to spread the gospel of Spex. " - xoxoxoBruce

12-12-2006, 07:55 PM	#12
Urbane Guerrilla Person who doesn't update the user title Join Date: Jul 2002 Location: Southern California Posts: 6,674	Tw wasn't; blame him. I often do. __________________ Wanna stop school shootings? End Gun-Free Zones, of course.

12-13-2006, 10:52 PM	#14
Urbane Guerrilla Person who doesn't update the user title Join Date: Jul 2002 Location: Southern California Posts: 6,674	Depends on if you can steer the #@%! boat.

12-13-2006, 10:58 PM	#15
rkzenrage Guest Posts: n/a	Yes, because the boat does not have full drag on the river, it glides over it. It will maneuver just fine against the current. The term is Airboat.

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