Help needed understanding turbojets

[Hul Tytus]

rec.aviation.homebuilt
Help needed understanding turbojets

Horsepower is defined/measured as 550 foot pounds per second. ie,
lifting 1 pound 550 feet every second is 1 hp. If you lift 550 pounds one foot
every second and keep that going for 12 hours or so every day, you are a
horse.
Similarly, an airplane with a one horsepower engine that travels at
550 feet per second at full power is pushing with the force of one pound.
Conversally, as above, if the plane's max speed is 1 foot per second the
thrust is 550 pounds.
Handy for gauging such questions as mentioned.

Hul

[Brian Whatcott]

Hul Tytus wrote:
>...If you lift 550 pounds one foot
> every second and keep that going for 12 hours or so every day, you are a
> horse. ..

> Hul

This has been tried: in 12 hours, they ended up with a DEAD horse. James
Watt didn't want any customer nit-picking about HIS horse-power so he
penciled in a generous power margin. But your numbers are good, of course.

Brian W

[[email protected]]

Maybe 6 hours - leave some time for eating...

Hul

Brian Whatcott > wrote:
> Hul Tytus wrote:
> >...If you lift 550 pounds one foot
> > every second and keep that going for 12 hours or so every day, you are a
> > horse. ..

> > Hul

> This has been tried: in 12 hours, they ended up with a DEAD horse. James
> Watt didn't want any customer nit-picking about HIS horse-power so he
> penciled in a generous power margin. But your numbers are good, of course.

> Brian W