On Tue, 19 Nov 2002 00:27:53 -0500, Alex Fraser <[EMAIL PROTECTED]>
wrote:

>    Randall has described this chugging as different than that heard at
>other times, he mentions a recurring pattern like an ascending scale.

Ascending then descending.  Or vice versa, none of the tapes picked up
the moan.  The chug frequency seems to be affected only by Doppler.

>Some have attributed this to movement affecting the observation, doppler
>effect. The electronic data is apparently not trusted for various
>reasons.

Different people trust it to different degrees.  I trust the amplitude
for sure, and probably the frequency. Something was shaking the
accelerometer pretty hard at 40 Hz.  Very unlikely it was on the whole
vehicle.  We'll take Henry's and Doug's suggestions and see what NASA
has to say about sensor isolation.

(Sounds like something from Star Trek, doesn't it?  "Captain, the
unknown ship has gone into sensor isolation.")

>    I would guess it comes down to another flight. I would think it
>would still be a KISS III flight? KISS IIIb? If flown will the same
>configuration for engine/ pressure feed be used with improved sensors?
>What should be looked for, that is what can be tested for the chugging
>problem?

We don't know any of that yet.  What number we give it will depend on
how much we change.  If enough of the proposed KISS IV mods make it
into the next flight test, we'll probably just go ahead and call it
KISS IV.  Otherwise, KISS III.I, IIIa, IIIb, III.5?  Who knows.  We're
not much interested in names at the moment.

-R

--
[EMAIL PROTECTED]
"The only time an aircraft has too much fuel on board
is when it is on fire."  -Sir Charles Kingsford Smith
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