Comments by "mpetersen6" (@mpetersen6) on "Scott Manley" channel.

  1.  @ronschlorff7089  Around 15 years ago there was a lot of work being done on mechanical batteries. Also known as flywheels. Supported in magnetic bearings and spinning in a sealed vacuum casing. Made of carbon fiber they did have some problems with delamination. They could be spun up quickly. Only they needed to be installed in pairs spinning in opposite rotation. Otherwise the vehicle handling could be problamatical.
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  2. What if a crewed Dragon just should up?
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  3. Instead of mining the Belt maybe it would be more beneficial financially to not only surface mine the Moon but if we determine that the mass concentrations present in the Moon are the remnants of large bodies that buried themselves in the Moon's interior and are not too deep it might be possible to do resource extraction there. Just how deep could we mine on the moon using automated equipment. I think eve tually when people do live there in large numbers the ideal living spaces will excavated under the surface*. A lot of the materials could be used in expanding CIS space infrastructure while those destined for use on Earth could be delivered via a mass driver. And yes I understand that the Mass Driver is technically a weapon system. But then there is no such thing as an unarmed space ship. * are non CIS spaces treated prejudicial 🙄🙄 ** Future human habitation of the Moon depends on several things. 1) Reduced launch costs. 2) There has to the economic and social need to do so. 3) If long term living in a 1/6th G environment is not overly adverse to overall human health. We really have no data on just what low gee means. We have two data points. 1g and Zero g. Is the plot on a graph a straight line? A curve that rises rapidly and levels off? Or a curve that rises slowly and then shoot up close to one g. The only way to find the answers is to do the actual research with rotating labs that allow for research at 1/3rd and 1/6th g. We actually could have done this already using Shuttle hardware.
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  4.  @fernbedek6302  The implication was if Sudbury and its rich iron nickel ores are the result of an Asteriod impact (and I think they are) there are likely other such sites on the Moon. And eventually mining operations on Earth will be drastically reduced. Either from over extraction of readily accessible ores. Excessive extraction costs. Or because of environmental concerns. Lunar resource extraction provided it proves economically feasible has the advantage of you have a launch window virtually every single day.
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  5.  @David-yo5ws  That's what I get for recalling something from the History Channel The Track Ball (which I prefer actually goes back to the late 40s)
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  6. There was also a proposal for a cargo module at the bottom of the Extrnal Tank. This could be used for outsized cargo or an approximately 26 foot diameter habitation module. If this had been built an flown we could have docked two ETs nose on to a beam structure and spun the assembly to provide a research facility on the effects of reduced gravity. Specifically 1/3rd and 1/6th g. We know that long term zero g is bad. We have no real idea as to the effects of reduced gravity. Are the effects linear? An ascending curve. Or one that climbs rapidly and levels off. If we ever intend on becoming a space fairing civilization we need to know.
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  7. And it's not like new processors can't be made.
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  8. Well, I guess Ellie is gonna need a new radio telescope. Jokes aside. Nobody got injured or killed. What I'm wondering is would it have been possible to lower the reciever structure once they knew that a cable had failed I once had a steel cable part about 3 feet away from me. Happened so fast I didn't have time to be scared. I was thoroughly pissed off at the crane operator who was not paying attention to signals. I was 30 feet off the floor on top of a large stamping press and he was down on the floor.
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  9. So Hyabusa increased the amount of micrometers and small chunks of rock. Ok not that much in comparison to that generated by a tual impacts
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  10. In German the technical term for this is "Upgehfuckt".
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  11. The round hatches just forward of the wings look like RAF roundels
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  12. Why couldn't the fuel and oxidizer be held inside bladders inside the tank the same way hydraulic accumaltors hold fluid under pressure
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  13. As to the Sedniods currently known if we are spotting them at their perihelion or close to it how many others are out there that are simply too dim to see by virtue of being farther out in their orbits
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  14. It's my opinion that we already could have had usable data on the effects of living in a reduced acceleration state. Provided we were willing to a) spend the money. And b) if there was the will to do so. This could have been done using Shuttle External Tanks for the core of the experimental habitat. Modify the ETs to have mounting points on their forward ends for a mating structure that could be carried in the Shuttle cargo bay. Mate two ETs nose on with an additional mating interface on the aft end. For the habitation/lab module use something like the inflatable TransHab with a counterweight on the opposite end. For power use the residual propellant in the ET to power fuel cells. Run test programs of sufficient time at 1/6th and 1/3rd gee. These being the logical choices for what crew would experience on the surface of logical desinations in the inner Solar System. We currently have two data points. Zero Gee and 1 Gee. With no knowledge of the effects in between. Do the effects on the human body track in a straight line on a graph? Or are they on a curve? And if so what is the shape of the curve. Does it rise rapidly and then level out. Or does it start gradually only to rise rapidly as it approaches 1 Gee.
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  15. And they didn't include a camera.
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  16. Foes anyone 4lse remrmber that big piece of tooling Elon had made when they were still looking at doing CarbonFiber for BIG F'ing Rocket. Could that be used for producing modules? Cool video from the Falcon fairing re-entry.
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  17.  @rhekman  I think he identifies as Muhammad Ali
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  18. It's the special rock camouflage hut model.
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  19. Well, they made it to orbit and deployed a payload. Now how long before they launch again? Where is BO's launch vehicle factory? These things are getting so big moving them cross country is getting absurb. Yes l now the Shuttle ET and boosters were shipped but that was Congerssional districts getting the jobs.
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  20. There has also been work done on using Aluminum/Aluminium and LOX as a rocket fuel. If l recall correctly one fuel was a LOX/Aluminum slurry for a monopropellant. Aluminum Oxide is also very arbrasive. Lots of grinding wheels are made from it. Engines using this fuel would have pretty low ISP but if the use is restricted to operations from the Lunar surface to orbit and back down it is also dirt cheaper.
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  21. ​ @slipknottin  Thankfully we have never really "used" them. I'm sceptical of the fusion rocket working out. A lot depends on just how power it takes to run and where the power comes from. Solar arrays? That limits just how far from the Sun you can get and still run the system. Run it off of a fission reactor?
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  22. There were models of the A-12 available in the 1960s. Pre 67 for sure. The box art shoed the aircraft at altitude with the curve of the Earth in the background. Take that flattards
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  23. Can you make a space suit* out of Duct Tape? Only if you're Red Green *Space Suit is a stupid name.
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  24. If a BFR crashes it makes a BFH. Big Freaking Hole.
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  25.  @simongeard4824  Surplus C-130 or equivilant. Winch system in the cargo bay.
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  26. Let's face it. The biggest draw for space tourism is going to be the sex.
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  27. At some point, someone is going to dream big. And have the finances to do it. That said we should have doing artificial gravity research for a long time. And we could have.
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  28. Scott, Now you to can have a Crawler Transporter of your very own http://www.microartwork.com/html/crawler_transporter_1-96_model.html Price is 130EUR plus shipping (14.30EUR to the UK and 19.50 to the US The designer also has a 1/96th scale model of the #9 Swing Arm that served as the access bridge to the Apollo Command Module as a free download. As it a digital file it is possible to print at a larger scale. Yah I said print. Its made of card stock. And it isn't easy http://www.microartwork.com/html/command_module_service_arm_-_download.html If you want your own Saturn V then try this. This is just the first stage http://jleslie48.com/s1_96ok.zip About 8.5"/213mm in diameter. There's one guy that was scaling up this to 1/12th scale
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  29. ​ @jeromethiel4323  There are similiar systems that are used to evacuate contaminated air from enclosed workspaces. Basically centuries that bleed compressed air through a slot at the wide end of the venturi. The better ones will move 100 cm for every cm introduced at operating pressure (typically around 6.5 Bar). Operate on the Conada Effect. Another product that uses the same effect is a Dyson fan.
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  30. Starship is a loooong way from being human rated. But as a heavy lift vehicle it's pretty close.
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  31. If we were playing the game of "how would you design a lunar lander" there's a couple of things I would do. 1) I like the idea of a "horizontal" lander but i have other reasons for this. 2) The lander would not have pads on the legs. The lander would have wheels with electric motors in them. The crew explores and takes samples from a certain area. The crew then drives the lander to a new spot. More mass for sure but i still like this idea. 3) The horizontal layout is more functional in terms of the crew spaces in my opinion. Look it as landing an RV. 4) Unmanned cargo vehicles could be prepositioned at an area meant for a permanent research facility. These would carry needed equipment. The purpose of such a facility would be research in a number of fields. Lunar construction using lunar resources. Lunar manufacturing. Lunar resource extraction for minerals, oxygen etc.
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  32. Dust off the plans for Pluto Express! IMO if we are going to build probes design a basic probe chassis that is series built. Instead of one or two build 10. Have a set of experiment packages. The main reason is for reasonably fast response time.
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  33. To stal a line from fusion research. NASA's return to the Moon will be in ten years and ALWAYS WILL
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  34. But did they catch Beowulf Schaeffer's Skydiver in orbit?
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  35. The main issues I have with the Starship being chosen are the current landing leg system along with just how well it would tolerate re-entry temperatures. The landing legs can of course be changed. Any landing area will have to be carefully chosen for slope, and obstacles (aka rocks). Of course any future permanent base could or should have a designated landing area that is sufficiently smoothed.
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  36. When, oh when is some organization finally going to build an orbital facility that features a spin section. As a species we have a total data set of zero as to the effects of reduced gravity on human physiology. Another orbital facility that would benefit from spin gravity is an orbital fuel depot.
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  37. NASA, one of the perennial political footballs of the US Federal Government
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  38. I really didnt expect this test to go as well as it did. To paraphrase the old Tom Lehrer song. "Once the rockets go up, who cares where they come down. That's OUR department Herr von Braun."
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  39. At some point in the future when regular flights to a permanent fa CV ability are taking place would it be advantageous to have the spacecraft land horizontally with some degree of horizontal motion with wheeled landing gear. Then "taxi" the spacecraft over to the airlock.
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  40. In a way this debate over what initiated the Younger Dryas 12,800 years ago reminds me of when Wegner and his publishing of first Continental Drift. He was vilified. His career ruined. One because he really couldn't come up with an explanation for the process. The other because he wasn't a geologist. Sometimes the experts in a field cannot see the trees for the forrest. Sometimes it takes somebody from the outside. Another example is J Harlin Brett's. His work on the massive floods in the Columbia River Basin at the end of the Ice Age was rejected out of had. In the end he was vindicated. In the end I think the people working on the impact will be too. It seems that some people just can't grasp the idea that the Earth's environment doesn't stop at the edge of the atmosphere. Earth orbits in a cosmic shooting gallery. Most times it's grains of dust and stuff like bird shot. But sometimes it's flying mountains. I don't think every climate downturn or major tsunami event is caused by an impact event. Or even most of them. But to think it never happens or it happens on the frequency of tens of millions of years is IMO either being blindly ignorant or will fully optimistic.
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  41. Even on a Niven Ringworld the structure needs to spin at 770 miles per second
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  42. OK cobber. I greeted Armstrong as he stepped off of the landing pad. And yes I stole the line.
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  43. And here on the chart showing possible formation processes Byrliium and Boron are stuck with only one way of forming.
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  44. Look at the mating face of the bottom half of the turbine housing. That surface along with the upper half. WAS FINISHED BY HAND. BY SKILLED CRAFTSMAN using hand tools called scrapers. The surfaces could be matched so closely that no gasket would be required between two halves of the turbine housing. Steam turbines were first used in the power houses of generating stations to spin dynamos. The steam turbine and reduction gear sets used in marine applications make Swiss watches look like Walmart specials
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  45. I'm surprised Scott didn't call the trunk the "Boot".
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  46. So for slightly more than the price of a decent chocolate bar from CVS you got a crappy 🔭. Now I know just what the initials CVS stand for. Crappy Vivitar 'Scope. And for those overseas drug stores in the US sell not only medication, perscription and over the counter, but damn near anything else. Including liquor
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  47. The most impressive thing is the autonomous docking. Just how much does the sample mass?
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  48. I have no idea if it is not on the schedule but I'd really like to see a repeat of the Hubble Deep Field image.
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  49. It will take a while to get competitive cost wise. One thing SpaceX has done with Starship is streamlining their build process due to their iteration test flight developing process. I doubt BO is anywhere near that mindset. Test,retest and test again.
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  50. The width to height ratio doesn't look that bad. I wonder just what the maximum angle it can land or stand on. Did the two vehicles land on the rim of craters? Ejecta boulders?
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