Skip to main content
31 votes

Why aren't all fighter jets' engine intakes on top instead of forward?

When the inlets are on top, the air entering the engine must make a 90 degree turn to get into the engine. This will cause inefficiencies and might cause massive separation -- which would be very bad....
Rob McDonald's user avatar
  • 12.5k
29 votes
Accepted

What sort of debris has been found in 737 Max fuel tanks?

As a generic answer, not unusual. Besides personal objects like bucking bars, clecos, rags and such left in tanks, the biggest contamination source, from my experience working on a production line ...
John K's user avatar
  • 132k
26 votes

Can a helicopter's main rotor mince a human?

Mince: Cut up or grind (food, especially meat) into very small pieces, typically in a machine with revolving blades. Blunt force trauma: Injuries resulting from an impact with a dull, firm surface ...
Michael Hall's user avatar
  • 26.4k
21 votes

Why aren't all fighter jets' engine intakes on top instead of forward?

Forward-facing intakes provide ram air compression, which convert airspeed into additional pressure. This significantly improves engine performance if there's any significant airspeed. It's true that ...
Therac's user avatar
  • 27.4k
19 votes

Can a helicopter's main rotor mince a human?

It will absolutely cut you to pieces. In fact, there are documented cases of rotor disks flexing enough to cut their way through the cockpit. That's why helicopter helmets are very heavy and ...
Dante's user avatar
  • 191
13 votes

Can "a drone" damage the wing of "an aeroplane" to the extent it actually threatens its ability to fly?

Mr Mann doesn't have a clue what he's talking about. Wings aren't made from 2024-O aluminum, which is fully annealed and very soft. The usual heat treat state is T3 through T6. A Mooney would NOT ...
John K's user avatar
  • 132k
13 votes

Is it possible for the Boeing 737NG to do a powerback?

Possible? Yes! But not recommended. There is nothing technical that would stop you from doing it. Thrust Reversers can be selected any time on the ground and there is enough thrust available to move ...
Bianfable's user avatar
  • 55.9k
12 votes
Accepted

How does the Harrier avoid engine damage when operating from dirt fields?

How does the Harrier avoid engine damage from dirt ingestion during rough-field operations? The short answer is that they don't. They avoid using these FOD-laden strips if possible, but doesn't have ...
Ron Beyer's user avatar
  • 36.2k
11 votes
Accepted

Can a helicopter's main rotor mince a human?

Minced could be closer than blunt force trauma, but neither is really going to be a great description. If decapitation is possible as @filo points out in the comments, we're not talking mere blunt-...
Chris H's user avatar
  • 1,157
11 votes

Why aren't all fighter jets' engine intakes on top instead of forward?

Takeoff is only a small part of the flight regime. And not necessarily the most demanding. A high G turn , where the inlet on the top of the wingroot is in the shadow of the airflow...air intake is ...
WPNSGuy's user avatar
  • 9,037
8 votes
Accepted

Could a golf ball damage an airliner?

Turbofans on commercial airliners are tested against hail, up to 'golf ball size', and ice is harder than a golf ball. Think back to Taca 110, that lost both engines while descending through a ...
tj1000's user avatar
  • 8,787
8 votes

Can a helicopter's main rotor mince a human?

"Mince" implies multiple strikes -- and really, more than just two or three. The distance between each main rotor blade of a full-scale (manned) helicopter suggests that multiple strikes ...
quiet flyer's user avatar
  • 22.7k
7 votes

Can a helicopter's main rotor mince a human?

A bunch of good points are being brought up in the comments. First to point to the differences between the tail and main rotors, despite being locked through the transmission and rotation in synchrony ...
Dante's user avatar
  • 71
7 votes

Could a golf ball damage an airliner?

Is there a risk? Possible but I'd say negligible. A typical champion golfer can drive a golf ball with a departure velocity of about 150 mph or so from the tee. That's fast but atmospheric drag ...
Romeo_4808N's user avatar
  • 73.8k
7 votes
Accepted

Why is the nosewheel of the MiG-29 placed in front of the engine intakes?

The MiG-29 series of aircraft are designed to operate from poor quality airfields, and for this reason, they feature separate air intakes for use while moving on the ground. See this article, ...
graphbobby's user avatar
7 votes

Can "a drone" damage the wing of "an aeroplane" to the extent it actually threatens its ability to fly?

Like anything in aviation it depends. A drone could easily severely damage any fabric-covered wing. This is everything from ultralights up through piper cubs and lots of high-powered backcountry ...
Dave's user avatar
  • 101k
6 votes

Could a golf ball damage an airliner?

This is an answer to a slightly different question: Could a golf ball damage an aircraft? The answer is yes, at least indirectly, as it has happened in 1987 in Benin. Basically, this golfer hit a ...
kebs's user avatar
  • 715
6 votes
Accepted

Materials for temporary dent repair?

What usually happens is the crew doing the walkaround spots something that looks like damage, calls airline maintenance, and techs come look at it. For a ding, they will consult the Structural Repair ...
John K's user avatar
  • 132k
6 votes

Can a helicopter's main rotor mince a human?

A friend who served as a helicopter repair station crew chief in Viet Nam says that will happen if a human walks into the tail rotor of a Huey. He himself heard the sound of a human skull getting ...
niels nielsen's user avatar
5 votes

Can a helicopter's main rotor mince a human?

ah well. not sure how much this has to do with aviation, but here it goes.. Hitting the rotor tip of a modern Helicopter: Rotor tip speed is usually designed to be slightly below the speed of sound. ...
Apfelsaft's user avatar
  • 702
4 votes

Is there any recorded instance of a passenger's hat or scarf being blown into an aircraft's engine?

If you are boarding with an engine running, it's going to be the one on the opposite side running with the one on the boarding side shut down. However, there's little doubt that items like that have ...
John K's user avatar
  • 132k
4 votes

Is it possible for the Boeing 737NG to do a powerback?

"Possible" as in, "last flight out of Saigon, we'll try anything because the alternative is worse," maybe. But Boeing doesn't publish any procedure for it, as far as I've ever seen,...
Ralph J's user avatar
  • 51.8k
3 votes

Can jet engine ingest (suck in) concrete from runway?

Small, loose pieces, it sure could. But those are small flakes which would fit in your hands. Large chunks, it’s doubtful that the suction could lift them to ingest them off the runway. Now there’s ...
Romeo_4808N's user avatar
  • 73.8k
2 votes

Would an S-92 / CH-148 (or any helicopter) be able to land successfully after rolling over and eating someone with its main rotor in flight?

A partial answer: some helicopter rotor blades are extremely fault tolerant. Just look at the grin on this lucky aviator and the blades on the chopper he has landed just a few a hours before: More to ...
Jpe61's user avatar
  • 28.8k
2 votes

Would an S-92 / CH-148 (or any helicopter) be able to land successfully after rolling over and eating someone with its main rotor in flight?

No. I suspect having a human body come in to direct contact with the rotor disk 1) would not “finely mince” a person but instead cause severe blunt force trauma followed by flinging the body or body ...
Romeo_4808N's user avatar
  • 73.8k
2 votes

FOD ingestion & engine damage - how does the crew know it happened?

Most likely either the captain or the first officer spotted the damage during a preflight walk around of the A/C and reported it to maintenance. The flight crew deemed the damage to be a flight ...
Romeo_4808N's user avatar
  • 73.8k
2 votes

FOD ingestion & engine damage - how does the crew know it happened?

The pilot and co-pilot actually have a much better field of view than one may expect from the cock pit. Now while one of them may have seen the pebble get ingested by one of the engines this is where ...
Zrab's user avatar
  • 21

Only top scored, non community-wiki answers of a minimum length are eligible