"My takeaways:" " - 6DoF should consider hard-stops for the fins."
Mechanical hard stops are already a feature of the current design " - We should consider treating Vision as its own category of projects. Documenting views on the way up is good for publicity, but I would like to propose that for the next launch we attempt to get cameras on every mechanical system." Although this would be very cool/useful, the spacial constraints of these assemblies are extremely tight it would be difficult to fit a camera in that could actually see anything meaningful. That said, we have been talking about adding a redundant potentiometer or two that would be able to report and record any kind of mechanical failure/performance issue. Chris On Fri, Jun 17, 2011 at 11:28 AM, Benjamin Kaplin <ben...@gmail.com> wrote: > Armadillo had two flights go bad on them recently. Here is a selection > of quotes and some ideas that struck me while reading their report. > > http://www.armadilloaerospace.com/n.x/Armadillo/Home/News?news_id=375 > > "Things that can't be tested before freeflight, like roll response, > need to be more carefully analyzed and simulated." > "Engine gimbal mounts need to be much stronger than their expected > loading. Moving away from a screw in a cantilevered beam may be > prudent." > "Having a hard stop in the engine gimbal mechanism other than the hard > stops inside the linear actuators would limit how quickly the rocket > can go out of control, reducing aero loading. The engine went to > something like 45 degrees, where 3 degrees would be a sufficient > maximum for a vertical takeoff with no translation." > "Most of the cameras on this vehicle were installed with the intention > of documenting the hardware, rather than the view. In a nominal flight > this is less useful, but for initial test flights this should be > standard." > "There should be at least informal crew rest requirements." > "The pressure drop of the secondary film cooling system should be > tested. Just as it would in the main injector, if the pressure drop is > too low it can cause or reinforce feed system and/or engine > resonance." > > My takeaways: > - Focus on the water-cooled, steam-driven engine as innovative > approach to heat transfer management. Film cooling is boring and hurts > Isp. I am going to pursue a heat-transfer analysis of the water-cooled > steam-driven engine in my thermo/fluids class. > - 6DoF should consider hard-stops for the fins. > - We should consider treating Vision as its own category of projects. > Documenting views on the way up is good for publicity, but I would > like to propose that for the next launch we attempt to get cameras on > every mechanical system. > > _______________________________________________ > psas-team mailing list > firstname.lastname@example.org > http://lists.psas.pdx.edu/mailman/listinfo/psas-team > > This list's membership is automatically generated from the memberships of > the psas-airframe, psas-avionics, and psas-general mail lists. Visit > http://lists.psas.pdx.edu to individually subscribe/unsubscribe yourself > from these lists. >
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