ADMIX
admix
admix
Set of flashcards Details
| Flashcards | 90 |
|---|---|
| Language | English |
| Category | Physics |
| Level | Other |
| Created / Updated | 08.12.2016 / 15.09.2022 |
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Induced drag is created by the:
spanwise flow pattern* resulting in the tip vortices.
*bilden
Di = spanwise flow pattern = tip vortices.
AR and induced Drag (Relationship)
a decrease in AR increases the induced drag
AR "^" : Di "v"
What is the effect on induced drag of mass and speed changes?
Induced Drag decreases with increasing speed and
induced drag decreases with decreasing weight!
DI ~ Weight
DI anti ~ speed
The induced drag increases as the lift coefficient increases.
DI ~ CL (lift coefficient)
High AR, as compared with Low AR has the effect:
decreasing induced drag and critical angle of attack.
High AR = decreased DI and AoA
TAS & Induced Drag
"TAS increases - DI decreases"
TAS anti ~ DI ((Diagramm) x und TAS))
CDi (The induced drag coefficient) is proportional with:
CL²
CDi ~ CL²
Induced AoA is the result of:
downwash due to tip vortices.
Induced angle of attack results from downwash due to tip vortices.
The span-wise flow on an unswept wing is from the:
lower to the upper surface via wing tip.
span-wise flow on an unswept wing:
lower to the upper surface via the wing tip!
local flow pattern:
By fitting winglets to the wing tip the strength of the wing tip vortices is reduced, which in turn reduces induced drag.
fitting winglets, reduces induced drag.
