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Deptfordx posted:drat, how do you actually slow down and land one of those things? You stop doing the acceleration loop and instead start doing things that bleed off energy until it's slowed down enough to land?
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Jul 22, 2020 10:50
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drunkill posted:https://twitter.com/Lensaloft/status/1285845932399972352 drat that's loving neat.
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Jul 22, 2020 13:19
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Animated: https://twitter.com/Qantas/status/1285873193840816130?s=20 Also: https://twitter.com/UPSAirlines/status/1285190350949294082?s=20
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Jul 22, 2020 14:35
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Cat Mattress posted:You stop doing the acceleration loop and instead start doing things that bleed off energy until it's slowed down enough to land?
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Jul 22, 2020 16:28
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evil_bunnY posted:Yeah you just dirty up the airframe (flaps, crow, spoilers) and it'll slow right down and sink like a brick if you want to. These gliders probably have none of the above (though I'm not sure what you meant by "crow"... "gear?") but it doesn't matter, once you stop doing the dynamic soaring maneuver, drag will slow it down. Maybe they even zoom up to a high attitude and fly it around like a regular glider for a while. vessbot fucked around with this message at 16:37 on Jul 22, 2020 |
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Jul 22, 2020 16:32
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A plane of that size has the square–cube law working hard against maintaining its momentum.
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Jul 22, 2020 16:40
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vessbot posted:These gliders probably have none of the above (though I'm not sure what you meant by "crow"... "gear?") but it doesn't matter, once you stop doing the dynamic soaring maneuver, drag will slow it down. Maybe they even zoom up to a high attitude and fly it around like a regular glider for a while. https://www.flyingrc.net/crow.html
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Jul 22, 2020 17:31
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Just learned something new, thanks! e: and I was wrong about these planes not having flaps. vessbot fucked around with this message at 18:18 on Jul 22, 2020 |
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Jul 22, 2020 18:11
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You’re a coward of you don’t fly the wings off and just catch the fuselage as it falls.
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Jul 22, 2020 21:02
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Warbird posted:You’re a coward of you don’t fly the wings off and just catch the fuselage as it falls. Ah, like those estes rockets!
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Jul 22, 2020 21:10
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hobbesmaster posted:Ah, like those estes rockets! I lost a shitload of those in the field next to my house as a kid. Mostly because we jammed in motors that were too big for the rocket and it probably got up to like 5000 feet and we couldn't see it anymore then i assume it blew up when the parachute charge fired.
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Jul 22, 2020 21:20
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I miss making my own rockets from whatever materials I could scavenge, then stuffing the biggest (D?) engines inside and hoping they’d fly straight, or at least not veer into anyone pr anything flammable.
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Jul 22, 2020 21:32
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Loucks posted:I miss making my own rockets from whatever materials I could scavenge, then stuffing the biggest (D?) engines inside and hoping they’d fly straight, or at least not veer into anyone pr anything flammable. Model rockets are the last hobby they'll let a kid buy dangerous and volatile materials for. 
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Jul 22, 2020 21:38
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Loucks posted:I miss making my own rockets from whatever materials I could scavenge, then stuffing the biggest (D?) engines inside and hoping they’d fly straight, or at least not veer into anyone pr anything flammable. Those big styrofoam gliders with a D in the back are hilarious.
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Jul 22, 2020 22:51
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High powered rocketry is a hobby available to you. 
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Jul 22, 2020 23:28
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Ambihelical Hexnut posted:High powered rocketry is a hobby available to you. There’s a lot going on in High Powered Rocketry!
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Jul 22, 2020 23:30
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Probably not compared to like...knitting, or birdwatching, but there are dozens of us!
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Jul 22, 2020 23:32
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Ambihelical Hexnut posted:High powered rocketry is a hobby available to you. *assuming you don't live near, or can travel to areas outside of, Class B airspace.
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Jul 22, 2020 23:34
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Ambihelical Hexnut posted:Probably not compared to like...knitting, or birdwatching, but there are dozens of us! This was a bad reference to “there’s a whole lot going on in air defense” video from the 70s https://youtu.be/85MDZfZr1ag The soundtrack rules
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Jul 22, 2020 23:36
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I don’t want to know you if you didn’t want the Mean Machine from the Estes catalog.
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Jul 22, 2020 23:38
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Haha that takes me back. When I discovered you could stage motors by taping them together I would stick 3x c6-5(? That's in my memory for some reason) and they'd hang out the back of the little rocket and fly out of sight. My brother would soak the parachute wadding in gasoline to make a fireball. Good times.
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Jul 22, 2020 23:38
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MRC48B posted:*assuming you don't live near, or can travel to areas outside of, Class B airspace. I will concede it's not a great hobby for someone without a car. priznat posted:This was a bad reference to “there’s a whole lot going on in air defense” video from the 70s Some sweet rocket footage as well. I will make a giant scale patriot one day.
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Jul 22, 2020 23:41
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Ambihelical Hexnut posted:I will concede it's not a great hobby for someone without a car. Save up some pennies for airfare and you can probably swing launching a full-scale Scud, or Burkan, or Qiam, or something like that.
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Jul 23, 2020 01:01
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Ambihelical Hexnut posted:High powered rocketry is a hobby available to you. And how 
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Jul 23, 2020 01:03
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priznat posted:There’s a lot going on in High Powered Rocketry! https://www.youtube.com/watch?v=zWvYe37r44c
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Jul 23, 2020 01:08
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Holy poo poo a quick Google revealed that the V-2 is, in fact, full scale
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Jul 23, 2020 01:24
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There are a lot of amazing projects out there like that. Jim Jarvis is amazing: https://www.youtube.com/watch?v=nzGOcTSvWNo
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Jul 23, 2020 01:29
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Model rockets are obviously cool as hell but the ultimate in nerdum in my mind are scale model rc aircraft.
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Jul 23, 2020 01:52
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So how long until an amateur high power rocket officially reaches the Karman line? Like, aside from (so far) not going high enough, some of those things look basically indistinguishable from suborbital sounding rockets. Reaching an apogee of 40+ km is less far from 80km or 100km than you might think.
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Jul 23, 2020 01:52
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Luneshot posted:So how long until an amateur high power rocket officially reaches the Karman line? And I'm morbidly interested in knowing how long until amateurs are able to use single-board computer advances to make homegrown SA-2s out of them. In Minecraft, of course. >.> Hi  .
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Jul 23, 2020 01:59
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Luneshot posted:So how long until an amateur high power rocket officially reaches the Karman line? https://www.google.com/search?q=amateur+high-power+rocketry+altitude+record Amm, 2004?
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Jul 23, 2020 01:59
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babyeatingpsychopath posted:https://www.google.com/search?q=amateur+high-power+rocketry+altitude+record Well that serves me right for not googling. That's seriously impressive.
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Jul 23, 2020 02:04
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The sounding rocket science is pretty well known/published. Going that high now is (I believe but have no personal experience) expensive because of the range/downrange, simulation, and tracking requirements, above the vehicle and propellant cost.
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Jul 23, 2020 02:30
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PainterofCrap posted:And how Nice
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Jul 23, 2020 03:26
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Plinkey posted:https://www.aviatorsmarket.com/detail/aircraft-for-sale/1980-general-dynamics-f-16-a-b-palm-beach-fl/2180 Man, that's in the hangar next to where my last job was Never saw no F-15 sitting around there, though.
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Jul 23, 2020 03:53
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Luneshot posted:So how long until an amateur high power rocket officially reaches the Karman line? I know I am beaten, but it was literally the #1 rocket in the video which was linked,
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Jul 23, 2020 04:46
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slidebite posted:Model rockets are obviously cool as hell but the ultimate in nerdum in my mind are scale model rc aircraft. I built a very big feature creeped quadcopter back before DJI and commercially available quads were a thing. All sorts of hacked together techs and I STILL haven't been game to fly it. I got the bug for some aerial photography so bit the bullet and actually bought a Phantom. I feel so dirty sitting this tiny Phantom next to my own creation.
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Jul 23, 2020 13:50
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https://www.youtube.com/watch?v=7E-_Uz8kqBc 1/16 scale N1 rocket. Video quality sucks, but it captures the moment.
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Jul 23, 2020 14:55
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babyeatingpsychopath posted:https://www.google.com/search?q=amateur+high-power+rocketry+altitude+record It would have been cool if they’d accomplished it one year earlier to bookend the Century of Flight.
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Jul 23, 2020 14:56
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BIG HEADLINE posted:And I'm morbidly interested in knowing how long until amateurs are able to use single-board computer advances to make homegrown SA-2s out of them. In Minecraft, of course. >.> This dude has a good engineering mind but I believe a finance degree and he will likely soon hit 1KM with hobby rocket motors and thrust vector control. Though, obviously very slow and very far away from an SA-2. https://www.youtube.com/watch?v=33NK2M6GXM4 Depending on the design requirements, IMO any demented engineer who reads "Ignition! A History of Rocket Propellants" and has a passing interest in mechanical design/electronics/SDRs could make a decent semi steerable rocket to launch at an unsuspecting helicopter or GA plane. Especially if the requirement is "scare the poo poo out of them once" during perfect conditions and not actually collide, operate in any adverse environments, or carry a warhead to detonate. Designing and manufacturing within 18 months a telephone pole sized missile of rapidly changing weight and balance that can track targets then maneuver in time at > Mach 1 however is still beyond most lone wolf designers. And probably all of those things are minimum capabilities to make something like a 1960s SAM. EDIT: Doing it for sub $50,000 would prob be a huge challenge as well. This thing will weigh 5000+ lbs, need to be transported, etc. SA-2 is a long way off most likely. Still, it worries me that its more and more possible, especially as simulators get better and better. You can do a lot of subsystem testing in a garage. CarForumPoster fucked around with this message at 16:06 on Jul 23, 2020 |
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Jul 23, 2020 15:59
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