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High Lift Devices презентация
Содержание
- 1. High Lift Devices
- 2. PURPOSE OF HIGH LIFT DEVICES To reduce the take-off and landing distances.
- 3. FLAPS A hinged portion of the trailing
- 4. PLAIN FLAP Simple construction, good increase of
- 5. SPLIT FLAP It is a part of
- 6. SPLIT FLAP LIFT. The split flap gives
- 7. SLOTTED FLAP When the slotted flap is
- 8. SLOTTED FLAP PURPOSE to direct higher pressure
- 9. FOWLER FLAP Moves rearwards and then down,
- 10. FOWLER FLAP LIFT Because of the combined
- 11. SLOTTED FOWLER FLAP THE KING OF THE FLAPS
- 12. LEADING EDGE HIGH LIFT DEVICES There are
- 13. KRUEGER FLAP The Krueger flap is part
- 14. VARIABLE CAMBER LEADING EDGE FLAPS To improve
- 15. LEADING EDGE SLOT A leading edge slot
- 16. LEADING EDGE SLAT A slat is a
- 17. AUTOMATIC SLOTS On some aircraft the slots
- 18. SEQUENCE OF OPERATION The leading edge device
- 19. ASYMMETRY OF HIGH LIFT DEVICES ROLL! YAW!
- 20. FLAP LOAD RELIEF SYSTEM
- 21. FLAPS OPERATION
- 22. KNOWLEDGE MAKES CONFIDENCE #хочубутипілотом
PURPOSE OF HIGH LIFT DEVICES To reduce the take-off and landing distances.
Слайд 3FLAPS
A hinged portion of the trailing or leading edge which can
be deflected downwards and so produce an increase in camber and, sometimes, an area of the wing.
Слайд 4PLAIN FLAP
Simple construction, good increase of lift, but high drag.
Mainly used
on low speed aircraft.
Слайд 5SPLIT FLAP
It is a part of the lower surface of the
wing trailing edge, the upper surface contour being unaffected when the flap is lowered.
Слайд 6SPLIT FLAP
LIFT.
The split flap gives about the same increase in lift
as the plain flap at low angles of attack but gives slightly more at higher angles as per upper surface camber is not increased, and so separation is delayed.
DRAG.
The drag, however is higher than for the plain flap due to increased depth of the wake.
DRAG.
The drag, however is higher than for the plain flap due to increased depth of the wake.
Слайд 7SLOTTED FLAP
When the slotted flap is lowered, a slot or gap
is opened between the flap and the wing.
Слайд 8SLOTTED FLAP
PURPOSE
to direct higher pressure air from the lower surface over
the flap and re-energise the boundary layer. This delays the separation of the airflow on the upper surface of the flap.
LIFT gives a bigger increase in lift then the plain or split flat
DRAG much less drag
LIFT gives a bigger increase in lift then the plain or split flat
DRAG much less drag
Слайд 9FOWLER FLAP
Moves rearwards and then down, initially giving and increase in
wing area and then an increase in camber.
Слайд 10FOWLER FLAP
LIFT
Because of the combined effects of an increased area and
camber, the Fowler Flap gives the greatest increase in lift of the flaps considered.
DRAG The least drag.
DRAG The least drag.
Слайд 12LEADING EDGE HIGH LIFT DEVICES
There are two forms of leading edge
high lift device commonly in use: the leading edge flap and the leading edge slot or slat.
Слайд 13KRUEGER FLAP
The Krueger flap is part of the lower surface of
the leading edge, which can be rotated about its forward edge.
Слайд 14VARIABLE CAMBER
LEADING EDGE FLAPS
To improve efficiency by giving a better leading
edge profile, the camber of a leading edge flap may be increased as it is deployed.
Слайд 15LEADING EDGE SLOT
A leading edge slot is a gap from the
lower surface to the upper surface of the leading edge, and it may be fixed, or created by moving part of the leading edge (the slat).
Слайд 16LEADING EDGE SLAT
A slat is a small auxiliary aerofoil attached to
the leading edge of the wing. When deployed, the slat forms a slot which allows passage of the air from the high pressure region below the wing to the low pressure region above it.
Слайд 17AUTOMATIC SLOTS
On some aircraft the slots are not controlled by a
pilot, but operate automatically. Their movement is caused by the changes of pressure which occur around the leading edge as the angle of attack increases.
Слайд 18SEQUENCE OF OPERATION
The leading edge device must be deployed prior to
the trailing edge flap is lowered.
When the flaps are retracted, the trailing edge flap must be retracted before the leading edge device is raised.
When the flaps are retracted, the trailing edge flap must be retracted before the leading edge device is raised.
