hypersonic
Faster than sound-squared
Hypersonic describes speeds exceeding Mach 5—five times the speed of sound.
The term applies mainly to missiles, aircraft, and spacecraft: hypersonic weapons, hypersonic flight.
At hypersonic speeds, air behaves differently, creating extreme heat and requiring specialized engineering.
The prefix hyper- intensifies supersonic, which merely exceeds the speed of sound.
Supersonic-combustion ramjet
- ramjetVelocity-fed aircraft engine
- X-15Hypersonic research aircraft
- waveriderOne who rides swells
- spaceplaneDual-realm aerospace craft
Having two operational states
- combustionExothermic reaction with oxygen
- inletWater extending into land
- nozzleFlow-directing pipe fitting
- thrustForceful forward motion
Removal by cutting, melting
- emissivityThermal radiation ratio
- enthalpyThermodynamic total heat quantity
Defense against a threat
- deterrencePrevention via threatened consequences
- interceptionSeizing something in transit
scramjet
Supersonic-combustion ramjet
dual-mode
Having two operational states
- combustionExothermic reaction with oxygen
- inletWater extending into land
- nozzleFlow-directing pipe fitting
ablation
Removal by cutting, melting
- emissivityThermal radiation ratio
- enthalpyThermodynamic total heat quantity
compressibility
Volume reduction potential
- leading-edgeAt technology's forefront
overpressure
Pressure exceeding ambient levels
- thunderclapExplosive atmospheric sound
countermeasure
Defense against a threat
- deterrencePrevention via threatened consequences
- interceptionSeizing something in transit
- speedspeed, quickness, rate, velocity, pace
- aerospaceairplane, helicopter, rocket, rockets, spacecraft
- hyper-hyperbole, hyperventilate, hypersensitive, hyperfocus, hypervigilant
- speedstop speed, maximum speed, cruising speed, speed limit, landing speed
- vehicle adjectivesfast, slow, new, old, used
- aircraft speedscruising speed, takeoff speed, landing speed, stall speed, top speed
hypersonicslow
Lacking in speed
stationary · motionless · immobile · standing still · still
hypersonicsubsonic
Below sound's speed
infrasonic · low-speed · transonic · Mach 1 · supersonic
- hypersonic missileWeapon exceeding Mach five
- hypersonic weaponsMissiles exceeding Mach five
- hypersonic flightTravel above Mach five
hyper, sonic, hyperactive, supersonic, ultrasonic, hyperlink, hypertension, hypertext, hyperspace