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Post by RiftandRend on Dec 10, 2016 5:17:26 GMT
Why are remote control units so heavy? On my lighter guided projectiles they are 90% of the mass. Some sort of light control unit that only allows the Homing command would be a good fix.
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Post by goduranus on Dec 10, 2016 9:00:12 GMT
I think currently it's representing a combination of a heat seeker, a millimeter-wave radar, a computer, a 10,000 km two-way antenna, and a small on board battery. It would be good to be able to redesign the RC component to add or subtract some of these capabilities though, like for unguided projectiles you wouldn't need a heat-seeker or the antenna or a big battery, but for a long range attack drone you'd need a huge antenna with a range of 10million kms and a battery that lasts for months.
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Post by RiftandRend on Dec 11, 2016 7:35:15 GMT
I just want an IR sensor and a microprocessor for my guided Coilgun projetiles. Its current mass is 1.14 Kg, and 1 Kg of that is guidance.
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Post by The Astronomer on Dec 11, 2016 7:42:15 GMT
I just want an IR sensor and a microprocessor for my guided Coilgun projetiles. Its current mass is 1.14 Kg, and 1 Kg of that is guidance. That might make a good kinetic impactor, except the 'guided' part. That delta-v part...
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Post by goduranus on Dec 11, 2016 11:32:22 GMT
I just want an IR sensor and a microprocessor for my guided Coilgun projetiles. Its current mass is 1.14 Kg, and 1 Kg of that is guidance. I don't think it's possible to make the guidance equipment that small, with self guidance 1kg might be hitting the realistic minimum. Although, maybe you could make the rounds command-guided? No idea how long is the range of your gun and how big an antenna you would need though.
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Post by mmmfriedrice on Dec 11, 2016 14:59:40 GMT
It seems that flak projectiles without a guidance unit don't detonate until they are impacting or past the target. I'd like them to be able to detonate before hitting the enemy, so a very simple remote control/proximity fuse might have a reason to exist.
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Post by lawson on Dec 11, 2016 19:34:16 GMT
It seems that flak projectiles without a guidance unit don't detonate until they are impacting or past the target. I'd like them to be able to detonate before hitting the enemy, so a very simple remote control/proximity fuse might have a reason to exist. Are your sure the shots are getting close enough to the target to hit? I think CoaDE flak is optimized to only go off if the fragments have a chance of hitting a ship. (why simulate bits that won't do anything?) Might also be a one "tick" activation delay. My flak railguns and coilguns work fine without a control module. Especially the 300mg and 500mg flak guns with >45Km/s muzzle velocity. (Do have to set hard range quite large. to 10Km for the 300mg flak) Finally there appears to be very small tolerance band for firing solutions. At extreme ranges RCS aimed guns just don't hit while the same gun with a turret hits just fine.
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Post by concretedonkey on Dec 12, 2016 17:27:10 GMT
I have pretty decent detonations without any remote control on all needle guns and on quite a lot of normal frag guns before that. I don't think a remote control gives you something in this case.
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Post by ross128 on Dec 12, 2016 17:53:01 GMT
I just want an IR sensor and a microprocessor for my guided Coilgun projetiles. Its current mass is 1.14 Kg, and 1 Kg of that is guidance. I don't think it's possible to make the guidance equipment that small, with self guidance 1kg might be hitting the realistic minimum. Although, maybe you could make the rounds command-guided? No idea how long is the range of your gun and how big an antenna you would need though. Well, unless you mean flight control surfaces (which would be the gimbal on your engine or your RCS if you use those), I'm quite confident that a basic guidance package can be made less than 1kg. How do I know this? Your cell phone weighs less than 1kg, and it is vastly more sophisticated than a typical missile guidance package. Fundamentally you're looking at a digital camera (the IR sensor) and a microchip that translates the IR sensor's input into engine commands.
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Post by themohawkninja on Dec 12, 2016 18:13:59 GMT
Well, unless you mean flight control surfaces (which would be the gimbal on your engine or your RCS if you use those), I'm quite confident that a basic guidance package can be made less than 1kg. How do I know this? Your cell phone weighs less than 1kg, and it is vastly more sophisticated than a typical missile guidance package. Fundamentally you're looking at a digital camera (the IR sensor) and a microchip that translates the IR sensor's input into engine commands. ^^This You can get an entire computer on a board with IO that has a mass of 45 grams at most (Raspberry Pi), and even a more basic computing board, the Arduino, only weighs around 37 grams. It should be noted that these are just general purpose boards. Stripping it of unneeded components and compacting it down for the specific uses we would demand could make them even lighter.
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Post by goduranus on Dec 12, 2016 19:08:44 GMT
Lol, how well does your cell phone camera take a picture of a warship 1000km away?
I challenge you to take a photo of the International Space Station with your cellphone camera.
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Post by shiolle on Dec 12, 2016 20:44:05 GMT
Lol, how well does your cell phone camera take a picture of a warship 1000km away? It's not like you need to take a detailed picture of something to detect it. A faint point of light will do. I mean, even your plain old Mk1 eyeball is able to detect flashes of light as faint as 5 photons and perhaps even a single photon that struck the retina. It's not something new either, it was known since the forties. So yes, an iphone camera, if used without the interference of the atmosphere can take a "photo" of the space station from 1Mm away, which will look like a dot, but it won't because it will fry. Electronics in space has to be insulated (to protect from sunlight) and cooled, so perhaps 1.1 kg may be overly generous. It's the fact that everything else can be made so small in comparison that I find hard to believe. P.S. By the way, for the same reason you don't need an array of Hubbles for your interplanetary vessel detection network and why a full-sky survey able to detect -20 magnitude light source can be done in four hours with today's technology.
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Post by ross128 on Dec 12, 2016 22:56:34 GMT
Lol, how well does your cell phone camera take a picture of a warship 1000km away? I challenge you to take a photo of the International Space Station with your cellphone camera. Considering how small a cell phone camera is, there's quite a bit of wiggle room in between "cell phone camera" and "1kg". And unless your guidance package relies on some heavy-duty image recognition, a few blobby pixels will do.
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Post by RiftandRend on Dec 13, 2016 4:42:21 GMT
I just want an IR sensor and a microprocessor for my guided Coilgun projetiles. Its current mass is 1.14 Kg, and 1 Kg of that is guidance. That might make a good kinetic impactor, except the 'guided' part. That delta-v part... Not a problem. The Coilgun launches it at all the velocity it needs. An ethylene oxide chemical rocket provides 200m/s of Delta V for correction maneuvers to guarantee 100% accuracy. It works fine as is but could be so much better.
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Post by RiftandRend on Dec 13, 2016 4:46:38 GMT
Lol, how well does your cell phone camera take a picture of a warship 1000km away? It's not like you need to take a detailed picture of something to detect it. A faint point of light will do. I mean, even your plain old Mk1 eyeball is able to detect flashes of light as faint as 5 photons and perhaps even a single photon that struck the retina. It's not something new either, it was known since the forties. So yes, an iphone camera, if used without the interference of the atmosphere can take a "photo" of the space station from 1Mm away, which will look like a dot, but it won't because it will fry. Electronics in space has to be insulated (to protect from sunlight) and cooled, so perhaps 1.1 kg may be overly generous. It's the fact that everything else can be made so small in comparison that I find hard to believe. P.S. By the way, for the same reason you don't need an array of Hubbles for your interplanetary vessel detection network and why a full-sky survey able to detect -20 magnitude light source can be done in four hours with today's technology. The guided shells are only active for about 9 seconds (10 kms and 90km range) so the cooling would only have to last that long.
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