User Trebia Project.

51 votes

Why does the Boeing 787 engine nacelle exhaust have such an unusual shape?

answered Feb 22, 2015 at 2:18

25 votes

Why are aircraft turbine blades made of nickel alloys?

aircraft-design turbine blade

answered Apr 29, 2015 at 19:42

13 votes

Accepted

How do landing gear retracting into the wing affect performance when deployed?

aircraft-performance landing-gear

answered Feb 6, 2015 at 18:56

9 votes

Why are aircraft external lights round, not tear-drop shaped?

safety aerodynamics visibility

answered Mar 10, 2015 at 22:08

9 votes

Would it be viable to install a screen in front of jet intakes to prevent them from sucking in birds?

turbine bird-strike foreign-object-damage

answered Apr 23, 2015 at 21:27

9 votes

Why do planes need a roll motion?

roll

answered Jul 27, 2019 at 20:14

8 votes

Accepted

Why is the GP7200-powered A380 fleet not grounded?

safety airline-operations airbus-a380

answered Oct 7, 2017 at 13:53

8 votes

Accepted

What is the method to calculate a finite wing's lift from its sectional airfoil shape?

aerodynamics lift airfoil

answered May 2, 2015 at 16:43

8 votes

Which air stream pressure / speed is measured by the pitot?

aircraft-design airspeed pitot-static

answered Jan 17, 2016 at 13:04

7 votes

What is the simplest way to explain a sonic boom that is still technically correct?

supersonic

answered May 17, 2015 at 16:28

6 votes

What is a vortex generator?

aerodynamics aircraft-systems vortex-generators

answered Apr 7, 2015 at 8:17

6 votes

Inviscid aerodynamics: why is circulation zero at the wingtip?

aerodynamics drag

answered Oct 4, 2016 at 22:51

5 votes

How many four-engine commercial passenger jetliner types are currently in use?

multi-engine

answered May 18, 2017 at 22:17

4 votes

Why doesn't ice form on the fuselage?

aerodynamics icing

answered Mar 21, 2016 at 10:40

4 votes

What is profile drag?

aerodynamics drag

answered Mar 30, 2017 at 19:52

4 votes

Is wing flex good?

aircraft-design wing wing-flex

answered May 14, 2015 at 12:32

4 votes

Why do only some aircraft require tail anti-icing?

aerodynamics icing anti-ice

answered Feb 9, 2015 at 22:19

4 votes

Is freezing of windows normal in airlines?

airliner airbus-a320 icing windows

answered Feb 10, 2015 at 13:39

4 votes

Accepted

What causes the reduction in speed across the shockwave?

aerodynamics supersonic

answered Jan 25, 2015 at 11:30

4 votes

Are aircraft with counter-rotating props or Down Between Engines less likely to develop asymmetric icing?

safety propeller icing

answered Jan 25, 2015 at 22:12

4 votes

Why do we never see high-bypass turbofan engines sharing the same nacelle on large airliners and similar aircraft?

aircraft-design airliner engine multi-engine

answered Feb 3, 2015 at 22:18

3 votes

What is Alpha protection?

flight-controls aircraft-systems

answered Feb 3, 2015 at 12:55

3 votes

Is there a surface of a commercial jet exposed to air flow at speed near Mach 1?

aircraft-performance airspeed

answered Jan 25, 2015 at 0:37

3 votes

Why do planes not fly "backwards" (up from the planes POV) when in a vertical climb?

aerobatics lift climb

answered Feb 17, 2015 at 22:38

3 votes

What is the purpose of flutter testing?

aircraft-design aircraft-performance aircraft-certification flight-testing

answered May 20, 2015 at 8:10

3 votes

Accepted

Is a swept wing the better option against the winglet

aircraft-design airliner

answered Aug 29, 2015 at 15:46

3 votes

What is the aerodynamic motivation behind vortex generators?

aircraft-design wing lift vortex-generators

answered Jun 4, 2018 at 22:01

2 votes

What happens to Flight Testing Aircraft after Testing is over?

commercial-aviation flight-testing

answered Feb 7, 2016 at 10:01

2 votes

Will wind tunnel modelling ever be completely replaced by computer models?

aerodynamics wind-tunnel

answered Jun 3, 2015 at 12:59

2 votes

What is the bypass air in a turbofan engine actually for?

turbofan bypass-ratio

answered Jan 22, 2016 at 21:36

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55 Answers

Why does the Boeing 787 engine nacelle exhaust have such an unusual shape?

Why are aircraft turbine blades made of nickel alloys?

How do landing gear retracting into the wing affect performance when deployed?

Why are aircraft external lights round, not tear-drop shaped?

Would it be viable to install a screen in front of jet intakes to prevent them from sucking in birds?

Why do planes need a roll motion?

Why is the GP7200-powered A380 fleet not grounded?

What is the method to calculate a finite wing's lift from its sectional airfoil shape?

Which air stream pressure / speed is measured by the pitot?

What is the simplest way to explain a sonic boom that is still technically correct?

What is a vortex generator?

Inviscid aerodynamics: why is circulation zero at the wingtip?

How many four-engine commercial passenger jetliner types are currently in use?

Why doesn't ice form on the fuselage?

What is profile drag?

Is wing flex good?

Why do only some aircraft require tail anti-icing?

Is freezing of windows normal in airlines?

What causes the reduction in speed across the shockwave?

Are aircraft with counter-rotating props or Down Between Engines less likely to develop asymmetric icing?

Why do we never see high-bypass turbofan engines sharing the same nacelle on large airliners and similar aircraft?

What is Alpha protection?

Is there a surface of a commercial jet exposed to air flow at speed near Mach 1?

Why do planes not fly "backwards" (up from the planes POV) when in a vertical climb?

What is the purpose of flutter testing?

Is a swept wing the better option against the winglet

What is the aerodynamic motivation behind vortex generators?

What happens to Flight Testing Aircraft after Testing is over?

Will wind tunnel modelling ever be completely replaced by computer models?

What is the bypass air in a turbofan engine actually for?