[Milsurplus] Re: Milsurplus digest, Vol 1 #428 - 15 msgs

[Horace W. Hall]

>
The starting speed of the bullet/rocket is the speed of the launching
platform. That's why they use multi-stage rockets on space shots.
>

That starting speed may not be sustainable, however, especially for
non-thrusting items such as bullets (which start slowing down as soon as
they leave the muzzle). Even a rocket may not be able to sustain its
launching speed if the launching craft, due to much larger engines &
different aerodynamic design, launches/releases them at or above the spee=
d
the rocket is capable of achieving on its own. Complications of flight
within atmosphere (particularly at very high speeds) prevent the simpler
assumptions of ideal physics cases from being helpful. =


--Wayne
  WB4OGM =