Our aircraft got momentarily lower than desired at times while on final approach due to the illusion, despite the altitude and descent rate
For instance, during the rover separation, they had to prevent the flight hardware from clashing or coming into contact with each other during the “two body phase” of the Descent Rate
Limiter (DLR)/bridle deployment.
The result is that the cabin altitude changes more smoothly and at a different pace than the aircraft's climb or descent rate
Significant winds flowing down the valley also increased our descent rate
The data shows the balloon had a moderate descent rate
initially, which then increased into a high rate of descent, to around 50mph.
The report said: "The rate of terrain closure exceeded 6000 feet per minute due to a combination of steeply rising ground and aircraft descent rate
I needed to touch down with the wings exactly level, with the nose slightly up, at a descent rate
that was survivable, and to touch down just above our minimum flying speed, but not below it.
As he did so he was conscious of the waiting aircraft and erroneously allowed the descent rate
The new craft will have battery power more than triple that of Alvin and a maximum ascent and descent rate
almost 50 percent faster, characteristics that will enable the new submersible to spend more time on the ocean floor.
Evers answered "maybe at 30 feet" but added that "no one knew the descent rate
would decease like it did".
The main parachute has a descent rate
of 16 feet per second, and the reserve is 21 feet per second.
A senior Federal Aviation Authority source said: "With that kind of descent rate
, it is going to be noisier than hell in the cockpit.