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11 votes

How do planes deal with excess lift at high speeds?

The lift generated by wings is proportional to the square of the calibrated airspeed and proportional to the angle of attack up to a point. As an airplane accelerates, it must reduce its angle of ...
Romeo_4808N's user avatar
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11 votes
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Why is calibrated airspeed (CAS) greater than indicated airspeed (IAS) at lower airspeeds?

Near stall speed the angle of attack is high and the pitot tube is pointed less into the relative wind. Thus it registers less pressure and shows a lower value. It also makes sense to calibrate the ...
Chris's user avatar
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6 votes

What if the onboard airspeed sensors fail?

Step 1 in any emergency: Fly the airplane. Thrust and pitch control your airspeed. A good pilot knows the settings for each phase of flight. It may not be exact, but it will keep the airplane flying. ...
Gerry's user avatar
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5 votes
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What if the onboard airspeed sensors fail?

In a light aircraft we're taught "pitch plus power equals performance" - and to an extent the same is true from a tiny Cessna up to a giant Airbus. My instrument instructor reminded me that ...
Jamiec's user avatar
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4 votes

optimal loiter speed for an eVTOL air taxi

What you are looking for is the speed for minimum power required. The fundamental difference between types of eVTOL aircraft for this question is whether this particular eVTOL has wings or not. If it ...
Rob McDonald's user avatar
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4 votes

How do planes deal with excess lift at high speeds?

If I understand correctly, wind force increases quadratically as airspeed increases Correct. Anyway we speak more correctly of "aerodynamic" force. Therefore, all other things being equal, ...
sophit's user avatar
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3 votes

When ATC tells you to climb or descent now, do the speed restrictions on SIDs and STARs still apply? (EASA)

The answer is yes in both cases. ICAO PANS-ATM (Doc 4444) is mentioning: 4.6.4 SID and STAR The flight crew shall comply with published SID and STAR speed restrictions unless the restrictions are ...
Stelios Adamantidis's user avatar
3 votes

Minimum sink speed and maximum endurance speed

It depends on the characteristics of the engine. Minimum sink speed is the speed for minimum power required. If your fuel consumption is generally proportional to power, then yes it should be very ...
Rob McDonald's user avatar
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3 votes

Thrust needed to overcome parasite drag that increases with speed

Drag is a force. Thrust is a force. The extra thrust needed to overcome the added parasite drag is proportional to the amount of that added parasite drag. But power is proportional to thrust times ...
quiet flyer's user avatar
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2 votes
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Why does aircraft weight influence position (installation) error in pitot-static systems?

At a given speed, the lighter aircraft will have a lower Angle of Attack than the heavier one, so at an actual 200 knots (and level flight), the indicated airspeed will have more effects from the AoA (...
Ralph J's user avatar
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2 votes

What is the mathematical relationship between mass and speed for constant thrust in level fight?

You can't do this. (see comments below) Expanding on quietflyer's comment, the result (consequences), of adding mass in a constant thrust scenario depends on where the aircraft (wing) is on the power ...
Charles Bretana's user avatar
2 votes

What is the mathematical relationship between mass and speed for constant thrust in level fight?

What is the mathematical relationship between mass and speed for constant thrust in level fight? What you're looking for can be easily obtained from the standard equations for lift and drag. Thrust $...
sophit's user avatar
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2 votes
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Why do I keep getting different results to an aircraft's turn radius when I plug variables into different calculators and solve on my own?

Units are the root of all evil in most of these situations. The original equation has a constant of 11.26. This would correspond to a Velocity expressed in some particular unit (knots, mph, km/h, m/s, ...
Ralph J's user avatar
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2 votes
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Why does Vx increase with altitude and Vy decrease?

Vx is all about using higher angle of attack (slower airspeed) and excess thrust to climb. The more excess thrust one has, the steeper the angle one can climb. As altitude increases, thrust output ...
Robert DiGiovanni's user avatar
2 votes

Why was the Me 262's top speed at 6km?

It has to do with the engine design, as follows. The higher a plane flies, the faster it can go for the same engine power. This is because as the air thins out, drag decreases. However, as the air ...
niels nielsen's user avatar
2 votes
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Comparing a Flight In Turbulent Conditions At Va And Vb

The requirements for VA and VB can be found in Code of Federal Regulations, more precicely in Title 14, Chapter I, Subchapter C, Part 25, Subpart C, Flight Maneuver and Gust Conditions ยง 25.335 (c) ...
Jpe61's user avatar
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2 votes

Do departure procedure speed restrictions override airspace speed restrictions?

You should remain below 200 knots while under class B. Accelerate to 250 knots once you leave the lateral boundaries of class B or enter the class B, whichever comes first. The 91.117(b) restriction ...
Chris's user avatar
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2 votes
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When ATC tells you to climb or descent now, do the speed restrictions on SIDs and STARs still apply? (EASA)

According to Canadian rules, Yes. I will do more research and try to make my answer more relevant to this particular question but as of now what follows is based on Canadian CARs. Unless specifically ...
PapaMike99's user avatar
1 vote

How do planes deal with excess lift at high speeds?

Some aircraft deal with excessive lift by having a "negative flap" setting, where the flaps are positioned up a little bit. Some gliders do this to reduce drag caused in high speed flight ...
Wayne Conrad's user avatar
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1 vote

Is this flight GPS data intentionally manipulated?

Uh wow. I managed to muster the courage to watch (mostly try to listen) the whole drivel video. What you have to remember is that flat earthers fall into two categories: Those who are just plain ...
jcaron's user avatar
  • 2,271
1 vote

Is this flight GPS data intentionally manipulated?

Screenshots are easily faked. I would describe arguing with a flat-earther as wrestling with a rubber octopus. There's nothing you can grab onto, and unlike you the octopus always has an extra arm. ...
niels nielsen's user avatar
1 vote

Minimum sink speed and maximum endurance speed

Minimum sink speed applies to gliding. It is based on the aerodynamic characteristics of the aircraft. Minimum sink speed is generally less than Vbg. The glider is not gaining distance as ...
Robert DiGiovanni's user avatar
1 vote

Does AOA become 0 after the aircraft flies in a particular attitude for sometime as the relative airflow has changed and how does it affect Stall AOA?

To clarify. The angle of attack is the angle between two vectors: the flight direction vector and the vector on the plane of the wing, which is also directed in the direction of motion (in some ...
BierRitter's user avatar
1 vote
Accepted

Determine Vx and Vy from other climbing rate datas

Since you have only one data point and no other information about the airplane, it is impossible to calculate the climb rates exactly. It seems your data point is neither at best climb angle nor best ...
Peter Kämpf's user avatar
1 vote

Determine Vx and Vy from other climbing rate datas

While there may be only a few degrees difference in angle of climb between Vx and Vy, let's see what those few degrees mean. The easiest way to determine climb rate at Vx and Vy is to actually fly it. ...
Robert DiGiovanni's user avatar
1 vote

How are IAS/CAS and TAS used in flight?

Too long for a comment to Alexander's post, so I post it as my own comment: CAS is IAS corrected for installation anomalies, mostly around the pitot tube. The correction itself is very minor, so most ...
Andreas Lauschke's user avatar

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