OPERATIONS MANUAL

Simulator Handling
Boost Server:
There are three selectable network tasks:
• Main client
• Main server
• Boost server
In the main network, one Precision Simulator is the main server, and all other
Precision Simulators are main clients. Aerodynamic data are transferred from the
main server to the main clients at 5 Hz. Flight control inputs and other controls
are transferred instantly and in any network direction, but only when a value has
changed. By this technique, data traffic is very low, and the simulated aircraft can
be manually flown even via the Internet. To achieve frame rates higher than 5 fps
at the other end of the network, the Precision Simulator clients do not extrapolate
the incoming data; they just run the same aerodynamics model the server runs. The
model is deterministic, based on instant flight control inputs and known atmosphere
data. Therefore, the clients need not estimate any vectors; they know the vectors,
and accordingly generate their own aerodynamics sufficiently fast for frame rates up
to 72 fps. There are minor fluctuations, but the synchronization at 5 Hz is fast enough
to compensate them before they become apparent to the eye.
What the server sends to the Precision Simulator clients, is also sent to add-on clients.
Now, for external scenery generators or motion platform drivers, the data rate of 5 Hz
is too low. The boost server solves this problem. Add-ons may, as usual, connect to the
main server on port 10747; however, they can also connect to a local boost server on
port 10749. The boost server sends aerodynamic data at rates up to 72 Hz.
Do not send boost server data through the Internet. Every main client at the other
end of the Internet connection can be used as a boost server—locally—to drive, for
example, an external scenery generator (boost client) at high speed:
User A
Precision
Simulator
SERVER
Boost
server
Local
network
of user A
Boost
client
Internet
User B
Precision
Simulator
CLIENT
Boost
server
Local
network
of user B
Boost
client
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