On Mon, 2003-09-29 at 22:03, Pierce Nichols wrote:
> At 06:49 PM 9/29/2003 -0700, Doug Jones wrote:
> >Alex Fraser wrote:
> >>Where is the chatter on this list about ERPS projects? Is the ERPS
> >>working on any projects? How are things going?
> >
> >I suspect that most of the progress goes on in face to face meetings and
> >work parties, with reports made at the regular meetings. We hecklers only
> >get the side stream on the list :)
>
> I'll let anyone else who wants to
> boast about what they've been working on pipe up :).
Actually, Pierce could also mention the continuing work on getting the Ranch up to code. It is an uphill battle with things falling apart almost as fast as we can fix them. A new hydrant, safety shower, and eye wash station are now a part of the propellants building, and most of the junk that was in the way is moved out to the boneyard. Planning and discussion is well under way for finishing the blockhouse and adding a building for ERPS use near the blockhouse (we will be evicted from the current propellants building at some point in the future).
I get the feeling that that point is in the *far* future. The new hydrant should be much less prone to freezing, as it has its own shutoff valve and bleeder installed.
Dave W has started freezing drug-store peroxide to test his freezer contraption and expects to move it to the ranch to test with real peroxide any day now.
Could be this weekend, even. I, however, will probably be spending this weekend at home getting some schoolwork done and my paperwork situations squared away, and finishing unpacking. Oh, and finishing the Gizmo simulation.
POGO is starting to move faster than the project manager can keep up with. The parts for the tank have arrived and Dan is ready to machine the last few bits for it, but I haven't got the detail drawings printed out yet! At the rate POGO is moving, POGO will fly before Gizmocopter. I hope Pierce's simulator works out well. (I should probably mention to him that it would probably be better to just model POGO. But he'd kill me after having gone through hell getting all the gizmo parts weighed and the propellers torques and forces figured out. Oh well, the missing part for getting Gizmo flying is also a necessary part for flying POGO.)
Oh, I would, but for another reason. The 6DOF equations in Simulink are written with the assumption that mass properties are constant. That means I would have to, instead of modeling the torques, model the changing level of propellant... and its sloshing. I might just be able to get away with modeling it as a pendulum, but that will be pushing it.
-p
"No science without fancy, no art without facts" - Vladimir Nabokov
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