Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [g-forces]

g-force (with g from gravitational) is a measurement of the type of acceleration that indirectly causes weight. Despite the name, it is incorrect to consider g-force a force, as "g-force" (lower case character) is a type of acceleration that can be measured with an accelerometer.

15
votes
5answers
6k views

People in a rollercoaster or falling elevator feel the rapid descent, so why don't pilots in the cockpit?

Judging from the CVR transcript, the AF447 pilots didn't realize for most of the plunge that they were stalled and rapidly losing altitude. Why don't pilots in the cockpit get the same sensation of ...
1
vote
1answer
84 views

Is there a maximum horizontal acceleration for passengers?

Are there any regulations regarding the maximum acceleration forces that passengers should experience during takeoff/flight/landing? Or what would be considered to be an acceptable horizontal ...
1
vote
5answers
181 views

Does headwind on takeoff affect g force?

I'm aware that headwind or tailwind does not affect rate of climb or descent but only the angle. I'm not sure if it affects the g force or not. I'd assume it affects g force because using trignometry, ...
2
votes
2answers
149 views

What G forces does a pilot perceive in a “1 G” barrel roll? [duplicate]

This is a follow on to an earlier discussion about pilot perception of G forces compared with actual aerodynamic loads on an airframe. Years ago, the Boeing 707 prototype famously did not one, but ...
1
vote
1answer
78 views

Barometric altimeter data during high vertical g-forces?

I’m contemplating that that under high vertical acceleration (such as the maximum limit of 2.5g for commercial airplanes), that hydrostatic atmospheric pressure wouldn’t be a complete model. Wikipedia ...
1
vote
3answers
124 views

Does Buoyant Lift Force scale with Load Factor?

Let's say I am flying an airplane that has a weight of 100,000 kg with a 1G load factor at normal steady flight. I have helium lift assist that is providing 50,000 kg (50%) worth of buoyant lift force ...
1
vote
2answers
213 views

Does angle of rotation during takeoff affect the g-force?

(Original) When an airplane banks 60° during row, 2 g of force is induced. When an airplane pitches 60° during takeoff, is 2 g induced on the airplane? Is the angle of rotation during takeoff ...
6
votes
2answers
3k views

How much g-force is experienced in a 45° turn?

A 60° turn in an airplane doubles the g-force; how much g-force is experienced in a 15°, 30° and 45° turn? Is it 0.5, 1 and 1.5g respectively?
6
votes
1answer
288 views

Why doesn't G-force knock this pilot out twice?

In this video an F-16 goes into a dive after the pilot loses consciousness. The Auto-GCAS corrects to avoid a crash, and the pilot regains consciousness and pulls up even harder. Why doesn't he pass ...
1
vote
2answers
381 views

What is the average g force experienced on takeoff for an ultralight?

How much g-force is made on an ultralight during take off if its upward velocity of 2m/s?And what's the average g force experienced during takeoff on an ultralight?
10
votes
10answers
12k views

Why do we feel gravity on a plane?

How come a plane flying at constant velocity experiences gravity? If you were in a space capsule flying (not accelerating) you would feel weightless until you hit the ground. Why not a plane?
21
votes
4answers
3k views

Can a barrel roll really be executed at a constant 1G?

I see this stated from time to time, for example in an answer to Can large airliners do aerobatics such as loops? A barrel roll is one thing; they can be performed at constant load factor of 1 G (...
2
votes
3answers
511 views

Can one fly up side down while a glass of water keeps full due to g-forces?

If one makes a looping for example with a plane and the g-forces that the planes makes will keep the water in the glass, but if one is at the top of the loop is there still enough g-force to keep ...
11
votes
2answers
515 views

How do pilots make rudder inputs during negative G flight?

During negative 'G' flight, the forces on the pilot (or pilots) will tend to push their legs up and away from the rudder pedals on your airplane. Needless to say, this is not conducive to making ...
1
vote
2answers
5k views

What are maximum G forces humans can survive?

I read that very high g forces could kill a pilot, brain pushing into the skull. Is there a way of decreasing or surviving these forces and how would it work if you ignore aircraft capabilities. If ...
4
votes
2answers
541 views

Can hypersonic aircraft be agile without the G forces harming the pilot?

I read that high G forces associated with hypersonic flight could kill the pilot. Is there any way of making this survivable yet keeping agility at hyper sonic speeds (irrespective of the plane's ...
24
votes
1answer
5k views

What kind of g-forces do birds experience and how does it compare to humans? [closed]

So bit of an odd one, but I was just looking at a sea-gull flying and wondering what kind of G-forces it could see in day to day flight? There are probably very fast birds of prey that when pulling ...
-1
votes
2answers
1k views

Is it centrifugal force that allows a non-aerodynamic body to achieve lift purely because of thrust? [closed]

If a body has a greater than one thrust to weight ratio, then is the centrifugal force acting perpendicular to the Earth's gravitational pull that allows it to fly ? Or are there other forces that I ...
7
votes
1answer
485 views

Where can I learn more about pilots' dreams during G-LOC? [closed]

I came across an extremely interesting note from a wiki article on G-LOC (g-force loss of consciousness, or blackout): Brief but vivid dreams have been reported to follow G-LOC. Sadly no citation. ...
7
votes
2answers
6k views

What level of G-force does our body experience when we are traveling in a passenger plane?

I have some understanding on g-force. But never come across how much g-force acts on a passenger who is traveling in a plane, especially when taking off.
10
votes
1answer
4k views

Where can a civilian obtain centrifuge training/testing?

Where can a civilian get high g-force training/testing in a centrifuge? (Likely by paying.) Preferably with and without a g-suit. Preferably based in the US, maybe Canada. I'm betting the US Air ...
3
votes
3answers
2k views

Can excessive G-force break or dislocate bones during pilot maneuvers?

Was wondering if the pilot would faint, could g-force be enough to maybe break the neck bone with the head and weight of a helmet being pulled downwards. Another relay to this is the effects on the ...
4
votes
2answers
4k views

How does an inexperienced pilot handle G-Forces?

After reading this question and the linked article, I had some more questions about G-Forces on pilots. The article says: The average, fit aviator has about a 3g "naked" limit, which comes from ...
12
votes
5answers
5k views

Why can't an airplane stall at zero G?

You may be surprised to find out that an airplane can stall at any attitude if the critical angle of attack is exceeded, but it cannot stall at 0 G. This quote found in the April 2014 issue of Flying ...