"Morgans" wrote in message
...

"Dudley Henriques" dhenriques@noware .net wrote

NASA conversion T38A with
angle of attack indexing.

Wahzat?
--
Jim in NC

Most AF T38's didn't use an angle of attack indexer (arrows and donut). The
NASA T38's used by the Naval Test Pilot School had them installed.
With an AOA indexer, the approach is flown a bit differently than without
one in your visual cues.
By keeping the donut lit, the airplane seeks the optimum approach AOA
regardless of gross weight. (In the 38, this is at .6)
Without the indexer, you can of course fly the approach on the AOA
indicator, which is a bit harder as the indexer is a direct read (high, low,
or on speed) and the indicator is a steam gauge.
Without using AOA for the approach in a T38, you need to calculate the
remaining fuel on a base final speed of 155KIAS + 1Kt per 100LBS fuel
1000LBS remaining.
You can fly the approach either way, but the indexer makes it a lot easier
since it's mounted on the top of the glare shield and you fly final using
direct visual cues and peripheral vision on the donut (on speed).
Dudley