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Does landing gear affect CG?
As mentioned earlier, on the ground, the total weight of the aircraft is supported by both the nose and main gears. Therefore, the further aft the CG, the bigger the weight on the main landing gears.
When the gear are retracted they are held up by?
Hydraulic pressure holds the gear up, so there are no uplocks as on some aircraft. The landing gear retracts or extends in about seven seconds.
How does CG affect stability?
The aircraft becomes less stable as the CG is moved rearward. This is because when the CG is moved rearward it causes an increase in the AOA. Therefore, the wing contribution to the aircraft’s stability is now decreased, while the tail contribution is still stabilizing.
What happens if your CG is too far aft?
If the CG is too far aft, it will be too near the center of lift and the airplane will be unstable, and difficult to recover from a stall. At slow takeoff speeds, the elevator might not produce enough nose up force to rotate and on landing there may not be enough elevator force to flare the airplane.
Which is better fuel burn fixed gear or retractable gear?
But the trip results in a time savings of just 21 minutes over the fixed-gear model, and the thirstier 200-hp engine pulling a heavier airplane (the retractable gear and associated hydraulics weigh about 145 pounds) results in higher total fuel burn (34.6 gallons), despite the shorter elapsed time.
Is there a moment change due to gear retraction?
In many of the POHs, in the W&B section it is indicated that there is a moment change due to gear retraction. For example : Moment change due to gear retraction +780 in-lbs.
How does a retractable landing gear work on an airplane?
Select the gear handle up, sense the slight change in aerodynamics, hear the retraction mechanism working away, and, finally, feel that solid thunk as the wheels land home in the wells. As the airplane transitions from part tricycle to all bird, we seem to shed finally the equipment needed only on the ground.
Why do we retract the wheels on an airplane?
We are seduced by the sound the landing gear makes as the wheels retract and thump against the uplocks. We delight in the transition that takes place as the airplane accelerates and the controls become lighter and crisper.