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37 votes

Why don't Airbus planes have perfectly smooth front sections?

It is not about Boeing versus Airbus, but rather about old versus new. Your representative image for Airbus is an A320, whose technological competitor by Boeing is the 777. Juxtaposing the two, we ...
Aditya Sharma's user avatar
22 votes

Why don't Airbus planes have perfectly smooth front sections?

The pinched-nose airplane has its (flat) frontmost windshield panels almost touching and raked back, which forces the vertical crease. The corresponding panels on the other airplane are farther apart, ...
Camille Goudeseune's user avatar
21 votes

What is this strake near the nose of the MD-80 for?

TLDR: They are there to improve directional stability. At high angles of attack, the wake from the fuselage covers the rudder, reducing yaw authority. Strakes mitigate this effect and thereby improve ...
ROIMaison's user avatar
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12 votes

Why doesn't Su-57 blend the engine nacelles with the fuselage, like other 5th generation fighters?

There are different definitions of what to call "stealth". Some aircraft like the B-2 are total all-aspect stealth, others like the F-15SE proposal only make small RCS reductions. The Su-57 ...
Therac's user avatar
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10 votes
Accepted

What are the bulges (with what look like air intakes) on the lower fuselage of the An-22?

This cutaway drawing shows it's the airconditioning unit, which would also explain why it has an air intake. Source - ww2aircraft.net Zoomed version: The relevant part of the legend: Next to the ...
ROIMaison's user avatar
  • 7,377
10 votes
Accepted

What is this strake near the nose of the MD-80 for?

The nose strakes on the DC9-50 and subsequent models are to energise the airflow around the fuselage at high angles of attack. Without the strakes, at high angles of attack, the turbulent flow around ...
DeltaLima's user avatar
  • 83.5k
4 votes

Why don't Airbus planes have perfectly smooth front sections?

I think you're comparing a 787 in to top to an A319 in the bottom. The 787 is unusually smooth in that area. It is a composite airframe, which allows some additional freedom to use curvature. You ...
Rob McDonald's user avatar
  • 12.6k
4 votes
Accepted

How much does the wing of a 6-seater plane weigh?

As others have shared, it is not plausible to save money in this way. Aircraft have lots of fixed operating costs -- insurance, annual inspection, depreciation, interest, etc. (and hangar rental) ...
Rob McDonald's user avatar
  • 12.6k
2 votes

Does the cross-sectional shape of a fuselage affect drag?

The quadratic body has more surface area compared to the round body, so this alone will guarantee a higher friction drag. If the angles of attack and sideslip were always zero and no lift is created, ...
Peter Kämpf's user avatar
2 votes

How much does the wing of a 6-seater plane weigh?

There are statistical methods for determining the component masses of airplanes. See for example the books of Jan Roskam or Egbert Torenbeek. Usually, those methods require parameters like wing span, ...
Peter Kämpf's user avatar
1 vote

Range, Endurance and Fuel Cost Savings of an Aircraft

At a minimum, you need to vary alpha to match lift at the same flight condition and then compare the drag coefficients. Comparing drag at different lift is meaningless. Both analyses should be ...
Rob McDonald's user avatar
  • 12.6k
1 vote

Why don't Airbus planes have perfectly smooth front sections?

Building upon this question and the relevant answers, it might have been not only a technical reason (aerodynamics or bird strike resistance) but also a simpler aesthetic/corporate reason in order to ...
sophit's user avatar
  • 13k
1 vote

How much does the wing of a 6-seater plane weigh?

As a rule of thumb, statistically the wing of GA aircraft weighs 12kg per m² of surface. The 16.30m² big wing of a Cessna 206 should therefore weigh a bit less than 200kg. More advanced methods take ...
sophit's user avatar
  • 13k
1 vote

Why doesn't Su-57 blend the engine nacelles with the fuselage, like other 5th generation fighters?

The F22 uses blended airframe that was designed for stealth very onset. Russia knew stealth was a terrible design alone so sacrificed capacity in exchange for improvements of engines. More likely ...
LazyReader's user avatar

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