On Sun, 11 Jan 2004 09:50:00 -0800, "Tarver Engineering"
wrote:


"Ed Rasimus" wrote in message
.. .
On 11 Jan 2004 01:19:53 GMT, (B2431) wrote:

From: Ed Rasimus

Not sure what "roll steering" is.

The only place I have ever seen the terms "roll steering" and "pitch
steering"
was in reference to the bars on an ADI.

Not even there, Dan. The ADI terminology was "bank steering" and
"pitch steering".

That would be because most INSs produse "roll command" and you would not
have "roll steering" in an F-4.


Dan's post refers to the nomenclature for the Attitude Director
Indicator. The two bars, one horizontal and one vertical, provide cues
for flying instruments, similar to the "bug" in more current displays.
They can offer commands related to navigation guidance such as turns
to headings or cues for flying ILS approaches or even be linked to
weapons release computers for fly up for lofted weapons deliveries.

The vertical bar on the display was called the bank steering bar
because it displaced left or right of center and when the proper
amount of bank was initiated, it returned to center. When your course
change was complete it displaced the opposite direction to return you
to wings level flight.

The horizontal bar was termed the pitch steering bar and it commanded
pitch inputs to achieve the proper climb or dive angles.

The nomenclature has nothing to do with the Inertial Navigation
system. The ADI is not specific to the F-4, but is the generic
attitude indicator display and was the same in the F-105, F-4, and
T-38, as well as a a number of other US aircraft which I don't have
several thousand hours in.


Ed Rasimus
Fighter Pilot (USAF-Ret)
"When Thunder Rolled"
Smithsonian Institution Press
ISBN #1-58834-103-8