zolotiyeruki Posted February 2, 2018 Share Posted February 2, 2018 38 minutes ago, CatastrophicFailure said: Giant Rocket: 1, butterfly: 0 Ok, so I'm here in orlando with the family, and this got me even more excited to go try and watch the launch. Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted February 2, 2018 Share Posted February 2, 2018 Spoiler 17 hours ago, DAL59 said: Anyway, what happened to the fairing recovery boats? On their way to home Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted February 2, 2018 Share Posted February 2, 2018 (edited) 1 hour ago, Racescort666 said: @CatastrophicFailure, I have been hyped. There was no controlling it. A good weather forecast sometimes does that. Well, we’re within a week, now. Maybe it’s time to start loading up the ol’ Hype Train. Edited February 2, 2018 by CatastrophicFailure Ithinkivanithinkican Quote Link to comment Share on other sites More sharing options...
StrandedonEarth Posted February 2, 2018 Share Posted February 2, 2018 Train? Hype Heavy is on the pad! Quote Link to comment Share on other sites More sharing options...
kerbiloid Posted February 2, 2018 Share Posted February 2, 2018 Spoiler 27 minutes ago, StrandedonEarth said: Train? Hype Heavy is on the pad! A heavy hype train Quote Link to comment Share on other sites More sharing options...
Josh IN SPACE Posted February 2, 2018 Share Posted February 2, 2018 I'm nervous and excited. I don't want to make any predictions yet. Quote Link to comment Share on other sites More sharing options...
_Augustus_ Posted February 2, 2018 Share Posted February 2, 2018 2 hours ago, zolotiyeruki said: Ok, so I'm here in orlando with the family, and this got me even more excited to go try and watch the launch. I'll be down there on Sunday. Can't wait! Quote Link to comment Share on other sites More sharing options...
cubinator Posted February 2, 2018 Share Posted February 2, 2018 I realized a couple days ago while thinking about how I'm going to write the launch theme that we could see both a successful mission and a spectacular explosion if there's an issue with a booster after separation. Quote Link to comment Share on other sites More sharing options...
_Augustus_ Posted February 2, 2018 Share Posted February 2, 2018 3 minutes ago, cubinator said: a spectacular explosion if there's an issue with a booster after separation. A single booster exploding on a nearly empty tank would not be much of an explosion. Look at the videos of failed landings; the barge at most suffered from some scorch marks and debris. Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted February 2, 2018 Share Posted February 2, 2018 8 minutes ago, _Augustus_ said: A single booster exploding on a nearly empty tank would not be much of an explosion. Look at the videos of failed landings; the barge at most suffered from some scorch marks and debris. Indeed, look at videos of failed landings. Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted February 3, 2018 Share Posted February 3, 2018 22 minutes ago, cubinator said: I realized a couple days ago while thinking about how I'm going to write the launch theme that we could see both a successful mission and a spectacular explosion if there's an issue with a booster after separation. Speaking of boosters, has a controlled separation like they’re planning ever even been done before? Quote Link to comment Share on other sites More sharing options...
cubinator Posted February 3, 2018 Share Posted February 3, 2018 2 minutes ago, _Augustus_ said: A single booster exploding on a nearly empty tank would not be much of an explosion. Look at the videos of failed landings; the barge at most suffered from some scorch marks and debris. Still noteworthy enough to make a difference in the music. Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted February 3, 2018 Share Posted February 3, 2018 50 minutes ago, CatastrophicFailure said: Speaking of boosters, has a controlled separation like they’re planning ever even been done before? No. Quote Link to comment Share on other sites More sharing options...
StrandedonEarth Posted February 3, 2018 Share Posted February 3, 2018 54 minutes ago, CatastrophicFailure said: Speaking of boosters, has a controlled separation like they’re planning ever even been done before? Big side boosters have been separated before (Shuttle SRB, Delta 4 Heavy, Soyuz). It has to be done in a controlled fashion, of course, to prevent collision. But without using pyros (don't actually know what Soyuz uses), with continuing active guidance and maneuvering of the boosters after separation? Yeah, don't think so. Really doubt that. Quote Link to comment Share on other sites More sharing options...
cubinator Posted February 3, 2018 Share Posted February 3, 2018 I suppose the engines can gimbal to help the boosters GTFO, as the pushers are surely not as strong as any variant of Sepatron rocket. I'm very excited to see it happen any way. Quote Link to comment Share on other sites More sharing options...
DAL59 Posted February 3, 2018 Share Posted February 3, 2018 Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted February 3, 2018 Share Posted February 3, 2018 the Hype Barge is officially underway. Quote Link to comment Share on other sites More sharing options...
KSK Posted February 3, 2018 Share Posted February 3, 2018 (edited) Hyperspace is just misspelled Hype Space, right? Lets Jump! My buddy Elon will get those engines working on time - or this'll be the shortest launch of all time... Edited February 3, 2018 by KSK Quote Link to comment Share on other sites More sharing options...
YNM Posted February 3, 2018 Share Posted February 3, 2018 (edited) Probably not on-topic : On 2/2/2018 at 10:24 PM, sevenperforce said: Elon posited that two FH launches is all it would take to drop astronauts on the moon and bring them back. Who would a private human launch falls into jurisdiction-wise ? I guess after Dragon sends people to ISS, maybe Musk can pull up a show or something. Edited February 3, 2018 by YNM Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted February 3, 2018 Share Posted February 3, 2018 14 hours ago, StrandedonEarth said: Big side boosters have been separated before (Shuttle SRB, Delta 4 Heavy, Soyuz). It has to be done in a controlled fashion, of course, to prevent collision. But without using pyros (don't actually know what Soyuz uses), with continuing active guidance and maneuvering of the boosters after separation? Yeah, don't think so. Really doubt that. In a sense, the Shuttle SRBs were actively controlled post-sep, since they were tracked and chuted down, but the sep mechanism was single-use, they used pyros, and the SRBs were essentially inert cylinders all the way to splashdown, so it's not really comparable. The Soyuz boosters vent the LOX ullage pressure from the nose of each booster, nudging them away from the core. 14 hours ago, cubinator said: I suppose the engines can gimbal to help the boosters GTFO, as the pushers are surely not as strong as any variant of Sepatron rocket. I'm very excited to see it happen any way. As far as we know, sep will take place post-MECO-1, so the engines on the boosters will not aid in separation. The cold-gas thrusters on the top of the boosters can push them away from the core, but the primary concern is that the CoM will be high enough that this would cause rotation, potentially slamming the engine cluster into the core before it can clear. Two possibilities exist: one, that the lower attachment points have a rotational degree of freedom, allowing the upper attachments to be released first so that the boosters yaw away from the core before the lower attachments are released. The other, that the lower attachments have pneumatic pushers to shove the octawebs apart with enough force to counteract thruster-induced rotation. Quote Link to comment Share on other sites More sharing options...
StrandedonEarth Posted February 3, 2018 Share Posted February 3, 2018 3 minutes ago, sevenperforce said: The Soyuz boosters vent the LOX ullage pressure from the nose of each booster, nudging them away from the core I must say, that is an elegant solution. Quote Link to comment Share on other sites More sharing options...
YNM Posted February 3, 2018 Share Posted February 3, 2018 8 minutes ago, sevenperforce said: The Soyuz boosters vent the LOX ullage pressure from the nose of each booster, nudging them away from the core. ... And makes a nice cross. Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted February 3, 2018 Share Posted February 3, 2018 (edited) The Zenit boosters for Energia used pyros for joint separation, then used a second set of pyros to separate from each others, then used a drogue on the tail to re-enter nose-first, then cut the drogue and popped mains at the empty CoM, then deployed landing legs and fired a third set of pyros to brake at horizontal touchdown. Probably the most complex solution for sep and recovery, but surprisingly error-proof. I recently did strap-on boosters with liquid retrothrusters near the CoM. Used action groups to fire the retrothrusters for separation, then switched back to the main engines for a boostback burn to KSC, then cut the engines, popped drogues, popped mains, deployed landing legs, and fired the retrothrusters again for soft touchdown. Edited February 3, 2018 by sevenperforce Quote Link to comment Share on other sites More sharing options...
CatastrophicFailure Posted February 3, 2018 Share Posted February 3, 2018 2 hours ago, sevenperforce said: As far as we know, sep will take place post-MECO-1, so the engines on the boosters will not aid in separation. I remember hearing a while back that they would keep one engine running on the boosters, specifically to “fly” away under control, presumably with help from the pushers for the initial oomph. Whether this is still the plan, I have no idea. They can’t give them too much of a rotational shove or they’ll tumble out of control. Intereting aside on the Energia boosters, do you have a source for pics of that? Quote Link to comment Share on other sites More sharing options...
sevenperforce Posted February 3, 2018 Share Posted February 3, 2018 13 minutes ago, CatastrophicFailure said: I remember hearing a while back that they would keep one engine running on the boosters, specifically to “fly” away under control, presumably with help from the pushers for the initial oomph. Whether this is still the plan, I have no idea. They can’t give them too much of a rotational shove or they’ll tumble out of control. I heard that proposed, but not by anyone connected. 13 minutes ago, CatastrophicFailure said: Intereting aside on the Energia boosters, do you have a source for pics of that? Yep! Spoiler Quote Link to comment Share on other sites More sharing options...
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