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How fast can an aircraft descend?
Airliners can descend over 8,000 feet per minutes if needed. A descent from 35,000 feet at that rate would have you down to 11,000 feet in 3 minutes or less.
How do you know when to start descent?
A good rule for determining when to start your descent is the 3-to-1 rule (three miles distance per thousand feet in altitude.) Take your altitude in feet, drop the last three zeros, and multiply by 3.
When should I start descent?
A: Normally an airliner will begin its descent around 100 to 120 miles from the destination (assuming the cruising altitude is above 30,000 feet). The point of initial descent varies depending on the cruise altitude, the amount of traffic going to your destination and weather conditions.
What does normal descent mean in a helicopter?
A normal descent is a maneuver in which the helicopter loses altitude at a controlled rate in a controlled attitude.
When does a helicopter climb and when does it descend?
If the collective is not changed and there is a change only in cyclic, the total thrust to lift ration does not change; aft cyclic results in a climb, and forward cyclic results in a descent with the corresponding airspeed changes. To level off from the descent, lead the desired altitude by approximately 10 percent of the rate of descent.
What is the glide rate of a helicopter?
Each type of helicopter has specific airspeeds (given in the autorotation chart or airspeeds listing in the POH) at which a power-off glide will cover maximum distance. this airspeed is usually at, or slightly above, normal cruise airspeed. Also, shown in these charts are airspeeds which will result in the slowest rate of descent.
When is the rate of descent the highest?
Note that the rate of descent is highest at zero airspeed, decreasing to a minimum rate at point “A”, and intermeadiate horizonal airspeed.