Then the rocket motor will cease and a pair of wing-mounted ramjets
will help it reach Mach 4.
Plans show the plane would be propelled vertically by rocket engines to supersonic speeds and then hydrogenpowered wing mounted ramjets
would take over and propel the aircraft.
While many research programmes focus on turbojets, ramjets
, turboprops, and engines for supersonic aircraft, turbojets prove to provide higher compression ratios (about 25 per cent higher than the other types) and therefore greater thrust.
transition to supersonic scramjets around Mach 5--five times the speed of sound.
High speed, air-breathing engines are known as ramjets
or scramjets because they ram oxygen into the front of the engines.
Scramjets, also known as supersonic combustion ramjets
, can theoretically halve payload weights by carrying only fuel - such as liquid hydrogen - rather than both the fuel and oxygen carried by traditional rockets.
were the simplest engines in use, amounting to carefully shaped ducts with fuel injectors.
As a major topic new to this edition, new propulsion methods such as duct rockets, ramjets
, pulse motors and thrusters are described in detail, while appendices on flow field dynamics and shock wave propagation have been added.
The plans show the plane would be propelled vertically by rocket engines to supersonic speeds and then hydrogen-powered wing mounted ramjets
would take over and propel the aircraft to its destination.
After reaching a suitable height, the pilot would engage a pair of rocket engines which would help the aircraft attain much higher speed and soar above the atmosphere, allowing a final set of engines known as ramjets
to be utilised.
Supersonic combustion ramjets
(scramjets) promise more airplane-like operations for increased affordability, flexibility and safety in ultra high- speed flights within the atmosphere and for the first stage to Earth orbit.
While many research programs focus on turbojets, ramjets
, turboprops and engines for supersonic aircraft, turbojets prove to provide higher compression ratios (about 25 percent higher than other types) and therefore greater thrust.