F104- Boundary Layer Control

Hi Scet;
I just noticed this post in passing. I'm sure Walt will comment from a
first hand point of view, and the zip was one I missed in my "garage" of
fighters I've flown.
I'll take a shot at what you want and see how close it gets to being
right anyway! :-)
If I remember right, the BLC on the zip was actuated by a valve directly
linked to the flap extension system. The EGT should be a function of the
power percentage and nozzle position. I believe the EGT should be
somewhere below 560 degrees on final with the BLC operative with flaps
over 15 degrees. I don't remember what the visual indication was if any
for the zipper to confirm BLC operation, but if memory serves, 82 to 85%
rings a bell as a minimum on final to avoid uncommanded roll and sink.
Keep in mind; I didn't fly this bird and am going on recall from hashing
with some friends who did. Walt will have better answers for you I'm
sure.
Hope this helps a bit anyway.
Dudley Henriques
International Fighter Pilots Fellowship
Commercial Pilot/ CFI Retired

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"Scet" wrote in message
...
When flaps are in the land position and boundary layer control is
active, is
there an increase in EGT that is sufficient to register on the cockpit
gauge?
If so, does the pilot look for the EGT rise to ensure the system is
working?
If not, is there an indication that the system is inoperative, is the
aircrafts handling characteristics on approach indicative of system
failure,
or is it fail safe?

Scet