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Cartes-fiches
Wenn kann ein C.G. entstehen ?
balanced forces = all forces is zero and balanced moments = The sum of the moments is zero
forward centre of gravitiy position?
increases static longitudina stability, descreases contrability, stall speed increases, range decrease
An aft centre of gravity?
longitudinal stability but increases countability, Range increase because the required wing lift is lower
3 Arten Flugzeug
1 Normal 2. Utility 3. Acrobatic
to prevent dangerous C.G. positions due to moving freight , whicht result in an uncontrolled dlight conditions ==>
Gepäck stabilisieren
Datum?
position on the longitudinal axis, the distance from a datum used ==> datum's position = Station ist der Abstand zur Datumslinie
Auf wie vielen Axens wägt man ein Flugzeug
3
MAC was ist das?
Mean aerodynamic Chord => is a reference chord length of the aeroplane wing => Leading edge of the MAC = is defined as 0% Mac while trailing edge is 100% MAC => Normal 10-40% MAC
Schwerpunkt vor der Schwerpunktlinie
Höhenleitwerkstall, eingeschränkte Steuerbarkeit => höhere Steuerdrücke am Höhenruder, schlechtere Flugleistung, Bugradlandung, höhere Überziegeschwindigkeit
Schwerpunkt hinter der Schwerpunktslinie
eingeschränkte Steuervarkeit des Flugzeuges, labile Steuerdrücke am Höhenruder , Schlechte Längsstabilität, gefährliches Überziehverhalten ==> Flachen Trudeln
For a given configuration, the stall speed of an aeroplane will be highest when loaded:
to the maximum allowable mass with the most forward CG.
1 USG Avgas in lbs
1 USG AVGAS = 6 lbs
Usefuel Load ist
playload and Fuel
Regulated Take Off Mass
RTOM is the lowest of the performed limited Take of mass and structural TOM
Balance arm which distance?
distance from the datum to the C.G.
The datum used for balance calculations is:
chosen on the longitudinal axis of the aeroplane but NOT NECESSARILY between the nose and the tail of the aircraft
- Load placed fwd of datum
à neg. moment, neg. arm, pos. weight