# Questions tagged [aerodynamics]

Aerodynamics is the study of how air moves and interacts with solid objects. It is an essential part of aircraft design.

2,341 questions
Filter by
Sorted by
Tagged with
647 views

### Airplane speed retention question? [closed]

Imagine the scenario when a plane is flying, then it turns off its engine and nose dives. After gaining a lot of speed, if the pilot pulls the stick back and the plane now points upwards again, will ...
280 views

### Why total drag formula include drag at zero lift?

Total drag = Do + DL Why total drag include drag at zero lift if we are interested at drag when wing produce lift? We cant assume that friciton and particularly pressure drag at zero lift AoA dont ...
• 1,648
1 vote
202 views

### Does induced drag drop when wing is stalled?

From formula, induced drag is function of lift. When wing stalls, lift is reduced so induced drag must also be reduced? Stall decrease static pressure at suction side of wing, so I know pressure drag ...
• 1,648
1 vote
41 views

### Would shockwave over a Supercritical aerofoil move downstream with Angle of attack? [duplicate]

over a supercritical aerofoil, would a shockwave move downstream with increase in angle of attack? I thought yes as the top surface is flat?
280 views

### What does this part on a vertical stabilizer do? [duplicate]

On a B787 vertical stabilizer shown in the image, there's this small fin at the leading edge that connects to the fuselage. It seems too small in size to be considered a dorsal fin. Simply adding this ...
• 415
149 views

### Why does minimum pressure point move towards leading edge with aoa?

why is it that the minimum pressure peak over the top surface moves towards the front of the aerofoil with angle of attack increase?
172 views

450 views

### Will the V280 operate with only one engine?

Can the newly contracted Bell V280 Valor operate on one engine?
190 views

### Why isnt the structure of the aircraft affected by high true air speeds or high ground speeds?

Let's suppose that in Cruise flight I exceed the VNE in TAS or in ground speed, why isn't the structure of the aircraft affected by the high speeds? I am sorry for my english, I am not a native ...
• 11
1 vote
175 views

### What is the additional planform area added to an A380 on take-off flaps setting (Flaps 1+F)

I would like to know how I can approximate the additional area added to wing on flaps 1+F: Can someone use other dimensions they know of the A380 wing and approximate what this area would be, we can ...
• 11
1 vote
161 views

### Can I identify wingtip stall by looking at the lift distribution?

I'm projecting a wing in XFLR5. The lift at the tip of the wing looks like it's dropping very quickly close to the stall angle, so I think there may be wingtip stall, however, is there any way I can ...
705 views

### Why does elevator trim hold a given airspeed? [duplicate]

I'm trying to understand a principle described in the book Stick and Rudder by Wolfgang Langewiesche between angle of attack and airspeed in relation to the elevator trim. He states that as angle of ...
• 297
368 views

### How does propeller length, pitch, and airspeed affect efficiency? [closed]

tl;dr: trying to find propeller efficiency with thrust, velocity and power and see which propeller length to pitch ratio is efficient. Hello, I'm a high school student working on an extended essay for ...
• 21
1k views

### Center of Gravity, Aerodynamic Center and Center of Pressure, how do they connect?

I read an article that described static margin by taking the aerodynamic center and the center of gravity. It explained why the center of gravity has to be in front of the aerodynamic center for a ...
65 views

### How does varying camber affects control over an aeroplane? [duplicate]

How does a trailing edge flap actually help an aeroplane? It just changes camber but what does that exactly do that’s beneficial?
700 views

### Mathematically calculate Mach number using CAS and PA WITHOUT flight computer

I am just wondering how to calculate the Mach number from CAS and Pressure Altitude WITHOUT the use of a flight calculator. E.g Given FL300 (30000ft) and 325kt CAS find and Mach number. I have always ...
1 vote
263 views

### Is this method to calculate a biplane's center of gravity using 57% of the biplane's gap and 23% of each wing's MAC correct?

Once you have the MAC for both wings and the CG balance point as a percentage of the MAC. connect the two CG positions with a line. Measure up between the wing Gap distance and place your center of ...
• 11
62 views

### Maximum Rotary Lift Altitude

Given that all factors are optimal, What is the physical maximum absolute ceiling altitude of a rotary wing aircraft?
1 vote
208 views

### What should be the ideal distance between wings in a multi-winged air plane?

What is multi-wing or multi-plane: For those who may not know, multi-wing air planes or multi-planes are aircraft that exceed the three sets of wings. The idea is while increasing the number of wings,...
• 187
445 views

### Rate and radius of turn formula

From this question and answer here there is a formula for both rate of turn and radius of turn. The formulas input are knots and degrees. I have no doubt the constants in the formula (11.26 and 1,091)...
• 12.2k