John:
This is not really something I’m inclined to debate.
I can see what I take to be coning in the exhaust during the last third of
the burn. I count three, maybe four such turns. That would imply around one
hertz; if the telemetry was at ten hertz, it strikes me as possible that
the sample rate might be too low to have captured it.
Bill
On Fri, Nov 19, 2021 at 6:46 PM John DeMar <jsdemar@xxxxxxxxx> wrote:
Bill,
The complete set of telemetry data for all DOF's looked reasonable and
indicative of the flight profile. The spiral in the plume isn't obvious as
it is burning but shows as the exhaust disperses. I'm just guessing, but
maybe it's from the fin vortexes and not from coning.
Here are my photos from the launch at FAR. My video is at the end of the
album:
https://photos.app.goo.gl/xekJPoNda3oAkGy1A
-John DeMar
Las Cruces, NM
From: William Claybaugh <wclaybaugh2@xxxxxxxxx>
Date: Fri, 19 Nov 2021 18:20:21 -0700
Subject: [AR] Re: Fwd: Evolution Space | Too Busy Chasing Stars Mission |
S Mot
John:
The corkscrew in the smoke trail says it was coning. If the telemetry
shows absolutely no sinusoidal pitch and yaw then an explanation for the
failure of the accelerometers to detect it would be my next question.
Bill
On Fri, Nov 19, 2021 at 6:15 PM John DeMar <jsdemar@xxxxxxxxx> wrote:
The fins were canted to induce ~6Hz spin at burnout. The telemetrydata
didn't show significant pitch/raw movement, at least at the forward end
where the electronics were positioned. The overall construction of the
rocket was quite stout, but the marman clamp apparently failed. So, no
recovery.
-John DeMar
Las Cruces, NM
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