Nov 02, 2022

# HAIFISCHHAUT für Flugzeuge! AeroNews

a Boeing Triple Seven, a huge long-haul plane, is now flying in a shark skin, what that means in detail and how it can take aviation one small or perhaps a little bigger step in the right direction, which we'll clear it up today, have fun with it and hello and a warm welcome. I hope you are well. This shark skin that is now attached to the fuselage of a Swiss Boeing Triple Seven is of course not a real shark skin, but a new surface structure that should or should have a positive influence on the fuel consumption of the aircraft is actually wrong because this surface structure, which is based on a shark skin, has been shown for a long time to reduce the fuel consumption of the aircraft because it reduces flow resistance and I would say we have a good understanding of what we are looking at now is part of fluid theory or fluid mechanics you remember familiarize yourself with the four forces acting on an aircraft in unaccelerated level flight lift and weight thrust and drag are balanced opposite forces we have exactly that unaccelerated level flight how much the greater this sag of drag, the greater must be the thrust on the opposite side In trying to keep our plane on the excursion d the horizon without accelerating, the greater the thrust arrow, the greater the thrust the engines must produce, so the higher the fuel consumption of the plane, it stands to reason that it would take a serious interest in this drag arrow. it is as small as possible in each phase of the flight this is also the reason why an airplane fuselage does not look like a brick because that would simply mean a lot of drag when flying and to be able to do that now you have to take a look at how the Airplane drag can also be done in different ways, but in aerodynamics it's common to break down total drag into induced drag and parasitic drag that a plane drags behind it and which are sometimes really visible when the air humidity is low. high. this is kind of an illustrated part of induced drag if a plane flies very slow and long story short it hangs very heavily in the air then it makes high induced drag if the plane flies fast and long story short it's really good in air, then the induced drag is comparatively low and the parasitic drag is all that remains.
This is first of all the resistance of the form. A big truck is not as aerodynamic as the new Mercedes EQ and it is frictional drag the airflow that is in the boundary layer against an object moving through the air in our case the plane can be laminar or turbulent those are two terms to remember laminar air flows around the plane and over the wings so it means the airflow is really perfect in parallel layers that don't mix with each other at low speed above that slightly higher flow speed per on top of that it's a little bit faster until at some point the total flow rate of the free air around the aircraft reaches the outside the frictional resistance that occurs here on the surface is pretty low because the air isn't flowing very fast either and the layers also do not mix with each other in a turbulent boundary layer it is exactly the other way around here everything flows a bit chaotically mixed here also the velocity of the flow directly in the surface is 0 but the air is flowing over it because everything mixes wildly here it mixes much faster and the drag is much higher for the lowest possible drag so having airflow is desirable laminate around the aircraft and around the wings for as long as possible.