Re: [Phys-l] rocket car -- detailed story

[Brian Whatcott <betwys1@sbcglobal.net>]

John Denker wrote:
> ...
>  In the rocket-car episode, they announced 
> that 1 pound of thrust is equivalent to 2 horsepower.  And they meant it!
> They /repeatedly/ asserted that their 1500 pound-thrust rockets provided
> 3000 horsepower. 
......

A low-ball estimate considering the likely maximum velocity involved, 
wouldn't you think?

:-)

Fishermen are quite apt to follow the trolling motor makers' lead in 
checking thrust from the
1/2  HP of electrical input while tethered to a jetty by a fishing scale.
This extends to pilots who make their own light aircraft, who want to 
maximize thrust of
the engine/propeller combination while tethered....

BrianW