Scramjets

> What is A ScramJet there is very little Info on how a Scramjet really
> operates. From what I read it basicaly just a ramjet where the shape is
> designed to operate at hypersonic Environment, is there any truth to my
> deduction or am I entirely Wrong......

A scramjet is basically a ramjet. The difference is how fast air flows
through the engine. In a ramjet, even a supersonic ramjet, the air is
slowed to subsonic speeds before combustion. In a scramjet, the air
remains supersonic throughout the combustion. Hence the name
Supersonic Combustion Ramjet, or Scramjet.

> And what is WaveRider - I can't find any technical info on this on Google.

As suggested, try a search for "waverider" and "hypersonic" together.

Here's a primer:
http://www.aerospaceweb.org/design/waverider/

"What is a Waverider?

Simply put, a waverider is any vehicle that uses its own shock wave to
improve its overall performance. The concept is probably most familiar
from the world of water sports-motorboats ride the bow wave they
create to reduce friction drag and surfers similarly ride the crests
of waves. An aircraft traveling at Mach 1 or higher also produces a
wave, a shock wave of air. If the aircraft is tailored correctly, it
can be designed to ride this wave to produce greater lift, less drag,
greater range, and overall improved performance. The reason waveriders
are only practical at higher Mach numbers is due to the fact that the
shock wave must remain close to the surface, a quality of hypersonic
flow. A shock creates greater pressures in its wake, and the shock
lying close the lower surface of the aircraft results in a large
pressure force increasing the lift on the vehicle. This idea, which
will be explored further in later sections, is known as compression
lift and is the primary benefit of the waverider concept."

Mike Miller, Materials Engineer