Table of Contents
Why dont commercial jets use afterburners?
Afterburners are a feature on jet engines that inject more fuel and oxygen for a quick and massive boost. Due to the high fuel consumption rate, the use of afterburners is limited to a few minutes in scenarios such as taking off on short runways or during combat.
Why has Concorde never been replaced?
But the economics of the Concorde was too much to handle. So, when the circumstances shifted after the Paris accident, the September 11th attacks and the subsequent drop-off in passengers, Air France and British Airways retired the Concorde.
Can turbofans operate at supersonic speeds?
Turbofans can tolerate supersonic speeds because the intake creates constant flow conditions irrespective of flight speed. Efficiency for propellers and fan blades is highest at subsonic flow conditions.
Why don t Boeing and Airbus make their own engines?
The Boeing Company does not make aircraft engines because it has chosen to specialize and focus on manufacturing aircraft frames where it has carved a niche for itself!
Why are there no supersonic passenger planes?
Drawbacks and design challenges are excessive noise generation (at takeoff and due to sonic booms during flight), high development costs, expensive construction materials, high fuel consumption, extremely high emissions, and an increased cost per seat over subsonic airliners.
Do turbofan engines have afterburner?
Since the 1970s, most jet fighter engines have been low/medium bypass turbofans with a mixed exhaust, afterburner and variable area final nozzle. An afterburner is a combustor located downstream of the turbine blades and directly upstream of the nozzle, which burns fuel from afterburner-specific fuel injectors.
Who supplies engines to Airbus?
Further, GE supplies engines for Airbus’ A330 family of aircraft. On Airbus’ A380 family of superjumbo aircraft, the company offers products build by Engine Alliance in which GE owns a 50\% stake [xvi].
Who makes the engines for Boeing 747?
The 747 is a quadjet, initially powered by JT9D turbofan engines, then GE CF6 and Rolls-Royce RB211 engines for the original variants….
| Boeing 747 | |
|---|---|
| Role | Wide-body jet airliner |
| National origin | United States |
| Manufacturer | Boeing Commercial Airplanes |
| First flight | February 9, 1969 |
Why didn’t the Concorde have an afterburner?
The Concorde’s turbojets, meanwhile, only needed afterburners at take-off and to break through the sound barrier, improving its fuel economy and lowering cabin noise while supercruising. Due to the noise they generate, supersonic jets aren’t allowed to fly over land.
How many engines does a Concord plane have?
The production airliner Concordes are propelled by four Olympus 593 Mk.610 engines and together they produce 152,200 lbs of thrust at take-off and 27,160lbs of thrust during the cruise at 60,000feet.
Why did Concorde need a high efficiency engine?
For Concorde to be economically viable, it needed to be able to fly reasonably long distances, and this therefore required high efficiency. For optimum supersonic flight, turbofan engines were considered, but then rejected, this was due to their large master cross-section which would cause excessive drag.
Are supersonic jets coming back to the US?
The content is produced solely by The Conversation. (CNN) — United Airlines has announced it will purchase up to 50 Boom Overture supersonic jets for commercial use by 2029, heralding the return of supersonic passenger flights nearly 20 years after the Concorde was decommissioned.