New answers tagged

3 votes
Accepted

How to fix JeppView VFR charts font display

JeppView uses different proprietary fonts in its charts. If they are not embedded when the chart is saved to PDF, lettering will not display correctly. On a Mac, running in the terminal ...
user avatar
7 votes
Accepted

How to "address" a flight plan to additional stations

The code LOWWYWYW is an AFTN Address (Aeronautical Fixed Telecommunication Network), identifying an AFTN station. In this case a sub-structure of the ATC ...
user avatar
4 votes

Difference between Maintenance planning document(MPD) and Maintenance Manual (AMM)

The MPD is the maintenance roadmap you might say, for the basic Maintenance Program agreed between the OEM and the regulator, that defines the inspection and test requirements to maintain ...
user avatar
  • 104k
4 votes

Difference between Maintenance planning document(MPD) and Maintenance Manual (AMM)

Both MPD and AMM are provided by OEM. MPD includes all the tasks (only task numbers / descriptions) needs to be performed with their intervals, required manhours, etc. AMM is maintenance manual which ...
user avatar
  • 41
7 votes
Accepted

How do GA aircraft flaps stay in place?

The total flap movement during extension is relatively small. This means there will be a significant gearing-down of the electric motor rotations between the motor shaft and the flap actuation axis. ...
user avatar
7 votes
Accepted

Why does the hydraulic pump of retractable-gear GA aircraft run continuously throughout the gear cycle?

Since there should be no pressure loss. There is no fluid loss, but there most definitely is pressure loss. Pressure is energy. More precisely, energy is pressure times volume. A hydraulic actuator ...
user avatar
  • 54.1k
1 vote

Why does the hydraulic pump of retractable-gear GA aircraft run continuously throughout the gear cycle?

As user3528438 pointed out, the reservoir seldom has enough capacity to run the systems it is feeding. It's purpose is more like being a dampener, as the pump would otherwise produce quite spikey ...
user avatar
  • 20.7k
6 votes

Why does the hydraulic pump of retractable-gear GA aircraft run continuously throughout the gear cycle?

It comes down to the basics of hydraulics. The pressure of the system is maintained by a pressure reservoir when the pump is not running, but the valve would leak a bit so the pressure "bleeds ...
user avatar
  • 2,377

Top 50 recent answers are included