Do jet fighters use Turbojet engines, and do cargo/passenger …
网页2021年8月16日 — Turbojets were mainly used in the Fourties and Fifties. As soon as pressure ratios had become high enough to allow adding a fan stage, turbofans replaced them. And the distinction is less between civilian and military engines but between low-bypass-ratio and high-bypass-ratio.
Do any manufacturers have plans to use turbojets in future aircraft ...
网页The first jets were turbojets simply because the turbine could only support its own compressor. They kept an edge for supersonic flight and will be the engine of choice if we ever design another Mach 3+ aircraft. Also, micro jets for cruise missiles and model aircraft turbines are turbojets to keep them simple.
What is the difference between turbojet and turbofan engines?
网页2019年11月4日 — Turbojets and turbofans are very similar indeed: both are turbine engines; both create thrust from jet exhaust; and both have a rotating implement in front that can be called a fan. Although in the case of the turbojet, it isn't called a fan but the compressor first stage. $\ $ Junkers Jumo 109-004. So what is the difference?
Why do most military aircraft use different engines than …
网页2017年12月17日 — Pure turbojets are noisy and thirsty, and modern fighters use low bypass jet engines with mixed exhaust streams, like the one depicted above. This configuration still allows for the use of afterburners: take-off thrust is where high bypass turbofans are particularly strong.
military - Why were turbojets the first kind of turbo-engines, …
网页2017年10月23日 — But why were turbojets first? Why not turboprops, which are easier since the turbo-machinery is smaller for a given thrust. Turboprops have propellers so it would've been a much easier evolution too. If I'm not mistaken, turboprops can fly higher and faster much more easily than piston-props, so it would've conferred an advantage.
jet engine - How do tubojets compare to afterburning turbofans …
网页2024年5月1日 — Turbojets used to be more common in the 40's and 50's but once jet engine design matured they pretty much went extinct in favor of the more efficient turbofan. I know one advantage of the turbojets is the high exhaust velocity which allowed a lot of turbojet aircraft at the time to supercruise, turbofans typically need the assistance of an ...
Are there cases of a thrust reverser used on a turbojet engine?
网页2016年7月29日 — Yes. The Rolls-Royce/Snecma Olympus 593 [Wikipedia] were pure turbojets and they had thrust reversers. Source: Wikimedia. Also, T/R on Concorde were also used in flight (If I remember correctly, only the inboard ones were used in flight) because Concorde didn't have spoilers. Being a civilian aircraft, with the engines …
How does turbojet thrust change with altitude?
网页2015年7月10日 — 3. As an aircraft increases in altitude, the density of air also decreases. Thrust available = Q (V1 - V2). The important part of this equation is Q. Q = (rho)AV which means that the smaller rho (density ratio) becomes, the less mass airflow there is which results in lesser thrust at high altitudes. Share.
Why did the 707 and DC-8 continue to use the JT3D even after the …
网页2019年8月14日 — 1: Technically, not all pre-JT3D 707s and DC-8s used a P&W turbojet (the 707-420 and DC-8-40 both used the Rolls-Royce Conway, the first turbofan ever to fly), but the vast majority did (as U.S. airlines were reluctant to buy airliners with foreign-made engines, meaning that most orders of Conway-equipped 707s and DC-8s were for the …
Are centrifugal turbojets easier to make than axial ones?
网页2019年2月2日 — To get surge in a centrifugal compressor engine you have to really obstruct the inlet, whereas with an axial engine you just have to disrupt the flow enough to induce blade stall. So in the 30s it was WAY easier, cheaper, and faster, development wise, to get a nice running engine using Whittle's design with the centrifugal compressor.
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