SwoopdeSwoop

I want to point out that these are Physicists discussing this, not Philosophers. They're not concerned with metaphysical possibilities, only experimentally verifiable answers.

I presume it would be necessary that it end up much closer to Mars than Jupiter if you want the most stable orbit, but I don't see why not.

My first thread! Yay! I've been in the process of designing my own E-LSA (Experimental Light Sport Aircraft) for a few years now. Throughout this design process I have been trying to stay on the cutting edge of material and design processes. One such aspect of these designs has been regarding bearings. My current design incorporates a ducted fan design with blades that run the perimeter along the inside of the duct (essentially the inner wall of the duct rotates with the blades). That design idea aside, I've been trying to develop a way to create bearings that could handle such a large mass, moderately unstable operating conditions, and large circumference. Traditional ball bearings are expensive on that scale and will wear quickly. Fluid bearings are complex and failure would have huge repercussions... involving the ground and some fire/blood. Trying to find a reliable, super-stiff, and maintenance free bearing sounds damned near impossible. But, I found a very interesting thesis: http://www.diva-portal.org/smash/get/diva2:7845/FULLTEXT01.pdf - it details the construction of a simple axial homopolar bearing using a rotor made of aluminum or copper. Apparently the author managed to make a fairly stable bearing capable of moderate to high speeds with high stiffness in such a configuration. My hope is to scale this up using a copper or aluminum sheet shell for the inner wall and axially magnetized rings or perhaps even simple (strong) bar magnets laid side by side. Either static magnetic or heavy duty roller bearings along the ends will serve as the caps; or landing bearings should anything fail. My hope is that the large diameter of the rotor will add to the stiffness of the bearing (higher speed along the circumference = stronger magnetic mirroring) if I understood the paper correctly. Any thoughts? Anyone here ever encounter something like this before? I know my current propulsion design is unorthodox. I'm still working on it but I'd like to keep away from that design element for the moment and focus on the bearing. I'll be doing a proof of concept with some smaller materials to see what sort of stability I can generate. If I can keep everything to scale (magnetic field, size, speed) I think I may just have an idea here that can help reduce my power losses, reduce complexity of the build, and keep me safe. :cool:

Hi sanctus, Thank you for checking, but I should have mentioned that I used a lot of throwaway emails and accounts when I was in high school. For some reason or another I was paranoid about being tracked. I'm not sure which throwaway it was either... I had over 30 I'll try to stick to this one.

It heavily depends on the car. When you turn the ignition all you are doing is cutting electrical power to the spark plugs and fuel injectors/pump. Until that power turns off, your engine is still spinning around ~10 times a second. That's several pounds of metal flying around at 10 times a second. It won't just stop instantly. Frictional forces along the drivetrain and internally within the engine take some time to work to stop the motor. The flywheel assembly (assuming it is a manual transmission) also maintains momentum of the drivetrain. The fan keeps circulating as a part of a safety feature in some cars. If you just shut your engine off immediately after driving it very hard, it remains extremely hot. But the fluid stops circulating since you've stopped your engine. This is extremely bad for the oil, coolant, and metal surfaces that undergo heavy friction. So to keep your car from cooking in its own juices, some manufacturers have included a feature that detects coolant temperature and keeps the fan and coolant circulating to help cool the engine down quickly after shutdown. Note that this feature does not continue to circulate oil within the engine and may still ruin some of the oil and metal within hot-spots of the engine. This is why high-performance turbocharged engines include things like turbo-timers which keep the engine running after turning the key for a short while. This will allow the engine and turbocharger to cool down before stopping completely. I hope this helps!

It would be the logical negation of the universally infinite set, no? So essentially you have a set that contains all other sets and "things", and Nothing is simply the denial or negation of that set. Wraps up nicely with the Universal Quantification and Existential Quantification operators in symbolic logic. I'll try to generate some notation for it tonight if I can.

Hello Hypography! Been lurking for a few years after being a slightly active poster when I was a young teenager. Decided I'd finally dip back in to the thick of it. - I go by Swoop online. - I found Hypography nearly 10 years ago and used it as a sounding board for my immature musings and questions. - I know it is frowned upon, but I created a new account. I cannot remember my old handle, email, or information from the past... It's been just shy of a decade and I can not stretch that far. - I have quite a few interests. Currently I am most interested in: Gender StudiesDesigning/building my own experimental LSA (light sport aircraft).Philosophy of Physics & Mind (I'm highly interested in Quantum Mechanics and how it may affect brain cell function)Automotive Tuning, Maintenance & Modifications - not just street-performance mods either. Things I want to learn most? I guess really I'd love to pick up where I left off in Uni before I changed majors. Had 2.5 solid years of Undergrad Honors physics under my belt before making the switch and I regret that a bit because I feel like I missed out on some very important information. Granted condensing 4 years of Philosophy and Political Science into 1.5 years really strained my brain. Even a year or so later I'm not quite as pliable as I once was. I miss concepts a lot. If I do that, please don't think I'm trying to be intentionally dense. I'm probably just frustrated... or too stupid. Thanks for your time! I hope to ask many questions of you all. And maybe, just maybe, answer a few as well.