Marco Sanfilippo
  • Member for 6 years, 5 months
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What is the purpose of the "Mirror-Thing" over the Mig-29 Cockpit?
22 votes

It's a mirror for a periscope used by the instructor (sitting in the back seat) to see the runway on landing. As reported here, two-seater versions of MiG-21 and MiG-23 also have the same feature. ...

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What is this feature on a Sukhoi Su-27?
Accepted answer
14 votes

It's the sensor of the IRST (InfraRed Search and Track) system. An IRST allow an aircraft to search and track aerial or ground targets using passive infra-red radiation only thus reducing the ...

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Which commercial aircraft can perform a parallel engine start?
11 votes

The main reason behind this capability is that the Boeing 787 starts its engines entirely on electrical power generated by the APU's VFSG (Variable Frequency Starter Generators) vs relying on APU ...

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Are there cases of a thrust reverser used on a turbojet engine?
Accepted answer
8 votes

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, ...

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What military aircraft has six propeller engines?
7 votes

You've probably seen a tanker variant of the C-130, like this KC-130J: Source: https://www.thedrive.com/the-war-zone On each wing there is an extra fuel tank and the pod containing the air-refueling ...

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Can a four-engine aircraft with limited fuel gain extra range by shutting down one of its engines?
7 votes

Yes, it's usually done by P-3 Orion. While it's usual on the P-3 to shut down engine 1, sometimes engine 4 is shut down, but engine 4 drives a generator, thus the load on the remaining generators ...

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Why is angle of attack information not displayed in the cockpit?
7 votes

It strongly depends on the aircraft we're talking about. As an example, this is the Head Up Display of an F/A-18 "Hornet": The number near the α is the angle of attack (AoA or α) measured in degrees. ...

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Can turboprop blades break the sound barrier?
7 votes

It seems sometimes happens on the Tupolev Tu-95 "Bear" long-range strategic bomber. According to various sources like this (the first result from a Google search), the tip of the propeller goes ...

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What additional functionality is provided by the F-14 nose pitot, absent in early models?
Accepted answer
6 votes

The probe on the nose isn't a pitot tube (although it might looks like one). That's an AoA sensor as explained here: Home of M.A.T.S. - Sensor Probes Reported from the link above: Angle-of-Attack ...

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Can you help me to identify this helicopter?
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6 votes

The helicopter is a Sikorsky CH-53 (probably an 'E' model). According to this site, the two sponsons holding the fuel tanks are also the place where the landing gear retract. EDIT: Probably not an 'E'...

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What is the one-engine-inoperative maximum range flight configuration?
6 votes

Your guess is right. In this article you can read about engine-out procedures. Because you can't maintain a certain altitude without sufficient thrust, losing an engine means you can't maintain the ...

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What's Concorde's engine fan blade tip speed at full thrust?
5 votes

Apart from the fact that the Rolls-Royce/Snecma Olympus 593 engines were pure turbojets so they did not have any fan, it's pretty easy to calculate (better approximate) the tip speed of the first Low-...

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Could wingsuits replace or supplement ejection seats?
5 votes

Apart every possible aerodynamic consideration, wearing a wingsuit in the tiny space of a cockpit would be extremely difficult. In the F-16, for instance, there are instruments, switches and the ...

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What are the advantages of a variable-incidence wing as used in the F-8?
5 votes

The Vought F-8 Crusader had a variable incidence wing because of the role it was designed to fulfill. Both the F-8 and the F-104 had comparable performances, but the F-104 was designed to operate ...

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Why is C-5 Galaxy not used for commercial airlines while Boeng 747 is?
5 votes

A commercial jet, designed to carry people, like the '747 or any other jetliner, need to fullfill a series of requirement about: noise (both inside and outside) safety (emergency exits, oxygen masks ...

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Do modern aircraft have the functionality for the pilots to look behind the aircraft?
Accepted answer
4 votes

Some do, some don't. It depends by the type of the aircraft and by the need to see behind the aircraft itself. Just as an example, this is a render of a Boeing F/A-18E "Super-Hornet" cockpit: On ...

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How does the Space Shuttle slow down during re-entry, descent, and landing?
4 votes

A quick glance at the Space Shuttle's page on Wikipedia will answer all your questions. By the way, Space Shuttle (more specifically, the orbiter was (last flight was in 2011) no different from any ...

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How does a boeing 707 have 4 engines instead of 2?
Accepted answer
4 votes

Boeing 707 was initially designed to use the P&W JT3C turbojet engine. Early versions of the '707 (like the one in the first picture of your question) and C-135 (including KC-135A) used those ...

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Can countries introduce new aviation policies unilaterally?
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3 votes

Aircrafts need to be certified to operate under FAA/European/Russian... regulations in terms of safety, noise, etc. For instance, in Europe EASA is the authority "for the airworthiness and ...

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Why can't horizontal stabilizers be longer than they are today?
3 votes

Concorde designers took a different approach: they removed the horizontal tail planes to decrease drag as much as possible. Every unnecessary thing (pod/pylon/etc.) on the outside of the fuselage or ...

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Can an engine on a Boeing 737 fly just using compressed air instead of jet fuel?
3 votes

In modern aircraft's jet engines (both turbojets and turbofans), compressed air is used: For starting the engine, spooling it up until the shut-off valve is opened and the fuel starts to enter and ...

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Why is an accident referred to by flight number instead of registration number of the airframe?
2 votes

The flight number is more readily available than the aircraft's registration number. With a simple call to the departure/arrival airport's information office (or even from the airport's website) ...

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