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Everything posted by Shpaget
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If the "western" countries set aside just 0,1% of their GDP for just one year and put it into a joint fund, they would amass many many billions. Certainly enough to finance an intensive R&D. They could pursue multiple different designs, figure out which one is the best/most cost effective/easiest to construct etc. Different teams would naturally compete with each other and the best design would soon emerge.
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Rubber bands. Among the three, that big plane might be the easiest one to fly.
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Would SpaceX ever sell it's Rocket engines for other customers?
Shpaget replied to fredinno's topic in Science & Spaceflight
My life experience has taugh me that everything is for sale if the right price is offered. Everything. -
Polaris is not visible from Siding Springs. According to ESA, the rate of SN in Milky Way is one in 50 years. If we assume similar rate in similar galaxies, you'll need quite a few of them in your view to catch one in a reasonable time.
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Gauging safe distance from nuclear explosion with your thumb?
Shpaget replied to RainDreamer's topic in Science & Spaceflight
If you know how big the mushroom is, then yes, you can estimate the distance. If you don't know how big it is nor how far it is, this approach will not be helpful. In a hypothetical world where all the nukes are of approximately same yield, this could be a viable technique. However, if I were the guy in the logo, I would orient my thumb horizontally to get more resolution for the mushroom cloud height (in vertical position he's measuring width). -
Let's just hope they don't make is a World of Tanks in Space arcade crap.
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The problem with that is that in order for the planets to be of any appreciable size, they would need to be spaced so far apart that the walk would not be fun. For example, there is a scale Solar system in Zagreb, Croatia. The Sun is 2 m in diameter, Earth is just a pebble less than 2 cm in diameter more than 200 m away. Pluto is almost 8 km from the Sun. https://en.wikipedia.org/wiki/Nine_Views
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ChrisSpace's planetary alignment trajectory question/challenge
Shpaget replied to ChrisSpace's topic in Science & Spaceflight
Speaking without actually watching the movie, if it takes only 41 days to get to Venus, they are not using Hohmann transfer orbits, but rather something much more direct and less energy efficient, meaning they can launch pretty much any time, so there is little need for planetary alignment. -
Well, the concept and science of going anywhere is sound. There is hard evidence that rockets work, so no reason to think that space flight is impossible. However, I can understand a person not believing that humans have succeeded in landing on the moon. Propaganda is a terribly powerful thing and if he was exposed to lunar landing conspiracy theories from an early age, I perfectly understand the his situation. There are a lot less credible things I've seen people believe and a lot more obvious things people refuse to accept. Anyway, good for you two. Recently I had a similar discussion with some family members. It covered everything from "vacuum produces zero G" misconception to "why it took so long to get to Pluto if we can launch satellites at will" confusion. The former took some explaining or free fall in orbit. The latter involved showing scale pictures of Solar system.
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North Korea's 5th satellite attempt-7th Feb 2016
Shpaget replied to xenomorph555's topic in Science & Spaceflight
Can't wait to see how it goes. I'd really like them to succeed. -
There is only one An 225.
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So, you have a plane on a conveyor belt...
Shpaget replied to Randazzo's topic in Science & Spaceflight
That's because cars are not designed to drive with a 200 km/h tailwind. If, however, you modify the transmission for it to be capable of spinning the wheels at 200 km/h with idle throttle, you would have no problem driving on a 200 km/h treadmill, even with a regular engine providing only the power required to overcome the losses in the transmission and the rolling friction, which is negligible compared to aerodynamic forces a typical car usually encounters when driving at 200 km/h on a regular road. -
So, you have a plane on a conveyor belt...
Shpaget replied to Randazzo's topic in Science & Spaceflight
If it takes x amount of energy to accelerate from 0 to 60, it takes 2x to accelerate from -60 to 60. Energy, not power. In practice, the energy requirements are actually less for deceleration from -60 to 0 than acceleration from 0 to 60 due to drag that is helping to decelerate. In either case, total energy spent on this deceleration is negligible compared to total energy spent on a standard flight. Take off acceleration, even for monster like a 747, lasts about 45 seconds. Compare the fuel consumption in those seconds to the fuel consumed on a 5 hour flight and you get the perspective (yes, even including the higher engine power at take off than at cruise). -
Photo is not clear enough to see what is connected where, so I'll just give you some generic responses. The red LED shines brighter because its forward voltage is lower than the yellow or the green ones, meaning there is more current flowing through it when using the same value resistors. It lights up when touched because you most likely have some 50/60Hz hum in the circuit that is coming though the power supply. Mains hum is notoriously hard to get rid of, so if that's the case I wouldn't even try to do much about it. Why you can do is to try using a different power supply, preferably a battery to see if it fixes the issue. Why it stopped glowing once you replaced it? I don't know. When you return the glowing one does it shine? If no, I'd say there is some other factor involved (you touching a grounded object like a PC case, central heating radiator...).
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So, you have a plane on a conveyor belt...
Shpaget replied to Randazzo's topic in Science & Spaceflight
I don't get it why is this even debated. All that matters for a plane is airspeed. Airplane does not care about the motion relative to the ground, nor does it care if it's wheels are spinning and how fast. Planes can fly backwards relative to the ground if there is enough head wind. If the conveyor moves the plane backwards, plane just needs to accelerate to match that speed and then it's the same as when starting from the resting state. Energy requirements are exactly the same as the energy required to accelerate forwards to the conveyor speed, which is not even worth mentioning considering the fact that it takes only seconds for aircrafts to take off, compared to hours that planes are capable of staying in air. Why did Adam and Jamie even take on this "myth"? It's asinine. -
Macross Missile Spam -> The only way to go
Shpaget replied to SomeGuy12's topic in Science & Spaceflight
I'm saying that at interplanetary distances beam weapons (using technology we have now or in near future) are not feasible. There are too many issues for them to be an effective weapon that can be deployed on a spaceship. 1000m radius antenna? Come on. How do you turn that thing without it wobbling horribly out of shape? Even if you could get a focused beam, pointing it accurately at a few million kilometers is going to be hard. -
Macross Missile Spam -> The only way to go
Shpaget replied to SomeGuy12's topic in Science & Spaceflight
Directional antennas are a lot easier to make than directional heat radiation. They also work at much lower powers. For example, New Horizons transmitter is a 12W thingy and has a half-power beam width of about a degree. Okay, maybe I misspoke. Not terawatt... Whats the next bigger prefix? Petawatts... Yeah, that might do. I'll refer you an earlier post in this thread, where beggers explains why you need such levels of power. http://forum.kerbalspaceprogram.com/threads/135385-Macross-Missile-Spam-The-only-way-to-go?p=2221733&viewfull=1#post2221733 Yes, I'm aware of YAL-1, and it's a toy compared to what you'd need in interplanetary conflicts at distances of millions of kilometers. -
That's something you'll need to figure out, keeping in mind the usability.
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You better find a faster way, because comparing it to all possible pictures will take a while (vastly understated and on cosmological timescale). Your algorithm has to be reversible, meaning you have to be able to generate a picture from the address (your four sections) and in reverse be able to produce the address from that picture. Your 4 sections per image will require many, many layers to be clicked through to get to the final image, around 6x10^351 of them (at 256 colors per pixel). Just writing down that address in the form of ((1,2,1,4,3,2,1,4,3,2,1,3,4,3,1,2)....) is impossible.
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Try not to cheat then. No autoclickers, no optimization apps and plugins, just good old fashioned grandmas.
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The difference is that TKEP has a goal - reduce the population to zero. Baking cookies has no such limit. Anyway, this is my status update. Still not near Starwhip, but I'm baking my bum off.
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Macross Missile Spam -> The only way to go
Shpaget replied to SomeGuy12's topic in Science & Spaceflight
There is a vast difference in hiding an active ship that is supposed to shoot terrawatt lasers and dodge incoming fire, and small passive telescopes that use a few watts for their cameras. -
C, C++, C# Programming - what is the sense in this
Shpaget replied to PB666's topic in Science & Spaceflight
Which brings me back to my first days of learning programming where GOTO was a go-to function for more or less anything. Need to jump around the code? GOTO. Need to iterate something? GOTO. Need to delay the execution of something? GOTO. They I moved away from Hello World and GOTO had to go to hell. -
Macross Missile Spam -> The only way to go
Shpaget replied to SomeGuy12's topic in Science & Spaceflight
You're thinking of Seebeck effect, but no, it won't work. The moment you start using it you start radiating. Easily countered by multiple very simple IR probes scattered around the solar system. Stealth aircraft use cold air to cool the exhaust, something that is not available in space. The atmosphere attenuates the remaining signature.