Re: [Phys-l] slow news day?

["LaMontagne, Bob" <RLAMONT@providence.edu>]

5 gal/hr in a Cessna is roughly 20 mpg

Bob at PC

> -----Original Message-----
> From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-
> bounces@carnot.physics.buffalo.edu] On Behalf Of Bernard Cleyet
> Sent: Thursday, June 23, 2011 10:42 PM
> To: Forum for Physics Educators
> Subject: Re: [Phys-l] slow news day?
>
>
> On 2011, Jun 23, , at 18:48, brian whatcott wrote:
>
> > Then there's another case:
> > I was talking to a fellow last week  who keeps an ex-Chinese primary
> > trainer. He's had it for fifteen years.   It will go 180 mph compared
> to
> > the modest 100 mph my old Cessna will do. Rugged and reliable
> (pneumatic
> > everything!)
> >  But it costs 18 gallons of mogas per hour, compared to my 5.5
> gals/hr.
> > I might easily have picked these numbers out of the air to illustrate
> > the square law of energy versus speed in airplanes - but I didn't.
> More
> > speed really does cost disproportionately
>
>
> More data please.   Not valid to fit two points of air speed and
> gallon/mile to a quadratic.
>
> Bryan!
>
> Your Cessna doesn't have a gallons/mile gauge like my Prius?
>
>
> bc wonders, What are their respective Reynolds' numbers?
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