Re: Sometimes physics is fun

[Jack Uretsky <jlu@HEP.ANL.GOV>]

        A safer alternative is the water rocket, which you pump by hand
andd spray water all over the track.



On Fri, 24 Oct 2003, Rick Swanson wrote:

> Our local high schools do racing with CO2-propelled cars.  They go VE=
> RY fast and would probably blow right off the standard pinewood derby=
>  track.
>
> For competitions, they run them along wires.  They smack into soft st=
> uff at the end of the run and can get dangerous if not controlled pro=
> perly.
>
> You could probably figure out a way to control the thrust and you wou=
> ld need a mechanism for releasing the gas (normally done by puncturin=
> g them).
>
> Cheers,
>
> Rick
>
> Richard E. Swanson, Ph.D.
> Dean of Instruction
> Physics Professor
> Sandhills Community College, Pinehurst, NC 28374
> swansonr@sandhills.edu (910) 695-3715
>
> > > > dcrowe@SOTC.ORG 10/24/03 03:19PM >>>
> I think my son uses CO2 capsules in his paint ball gun.
>
> Daniel Crowe
> Oklahoma School of Science and Mathematics
> Ardmore Regional Center
> dcrowe@sotc.org=20
>
>
> -----Original Message-----
> =3D46rom: Jack Uretsky [mailto:jlu@HEP.ANL.GOV]=20
> Sent: Friday, October 24, 2003 1:13 PM
> To: PHYS-L@lists.nau.edu=20
> Subject: Re: Sometimes physics is fun
>
>
>         How about CO2 capsules.  Are those still around?
>
> On Fri, 24 Oct 2003, J. Green wrote:
>
> > I am going to enter a pinewood derby and am interested in what you =
> =3D
> all might
> > think about designs.  But this is no ORDINARY pinewood derby.  They=
> =3D
>  have
> > graciously thrown the rule book out the window.  Anything goes (exc=
> =3D
> ept for
> > open flames, which I understand).  The contraption needs only to fi=
> =3D
> t on a
> > standard pinewood derby track and operate without damaging the trac=
> =3D
> k.  They
> > have specifically stated that there are no weight limitations and n=
> =3D
> othing
> > against motors.  The real challenge is to do this on the cheap.  An=
> =3D
> yone can
> > win with a huge budget, but how to do it cheaply?
> >
> > Josh Green
>
> --
> "Don't push the river, it flows by itself"
>                                 Frederick Perls

--
"Don't push the river, it flows by itself"
                                Frederick Perls