Veritasium direct downwind video debunked

[Andy Chee]

I fear this cart demonstration is inconclusive.

Fortunately Xyla’s design has been published, which means her design can be replicated and tested by other people.

Contrast this with the OP’s (now deleted) video, and we only have his word for it that his completely different design proves the physics impossible (no design details supplied).

[spork]

I see too much hands_on of the cart. That probably includes downward force that keeps those rubber tired wheels in firm contact with the belt. So yes, the propeller and wheels both have stored energy when it is released. I have to wonder what it would do if it were allowed to run on the treadmill for a minute or two with NO force except to hold it in the fore-aft direction before it being very gently released to run on it's own with no outside forces/guidance. But for that it needs at least a steering mechanism to keep it centered. And that steering mechanism can not be mechanically tied to anything external to the cart. 

I fear this cart demonstration is inconclusive.

There are a number of videos showing the cart on a "circular treadmill" (basically a turntable) where the cart is at the end of an arm that pivots from the center.  No one ever touches it.  They just start the turntable spinning and wait and see.  The turntable and the cart begin moving in one direction.  The cart accelerates until it's not moving relative to the room, and then begins moving in the opposite direction from the turntable.  It continues this for 10 minutes or more.

[soldar]

Now this thread is basically dead, just outta curiosity, why are alt accounts a no no?

Why would you allow socks? What is the point of having my sock support what I say?  I just cannot see it.

[Dan123456]

Now this thread is basically dead, just outta curiosity, why are alt accounts a no no?

Why would you allow socks? What is the point of having my sock support what I say?  I just cannot see it.

I was thinking maybe people that want a business account along with a personal account or something along those lines 

I.e. if the JLCPCB guy wanted an offical account to respond officially to threads about their service (like they have and do), but also wanted a personal account to post as themselves 

That said, Halcyon said they would consider requests where there was a good case for a second account so I would say that would probably be covered and can I not think of any other genuine circumstances warranting a second account

[ridgerunner]

... I have to wonder what it would do if it were allowed to run on the treadmill for a minute or two with NO force except to hold it in the fore-aft direction before it being very gently released to run on it's own with no outside forces/guidance. But for that it needs at least a steering mechanism to keep it centered. And that steering mechanism can not be mechanically tied to anything external to the cart. 

I fear this cart demonstration is inconclusive. ...

Here's my 2-channel (steering and variable pitch propeller) radio controlled cart running up and down the treadmill hands off for more than five minutes ...

[SiliconWizard]

Does it run Doom?

[spork]

Does it run Doom?

I suppose it's kinda doom for the moron that started this thread thinking he debunked something so incredibly well documented.