January 25, 20215 yr Administrators Seems to be live, but there seems to be a wind condition at the moment! Charlie AronAVSIM Board of Directors-ADMIN/Moderator-RegistrarJust going to run a Chromebook and not upgrade to a Windows computer. Too many problems with the new Sims! 😱Trying to keep peace and harmony and the will of Landru on the site seems to be a full time job!
January 25, 20215 yr Author Oh right. 20:26 here, so I'll be fast asleep by the time they launch probably. 😄
January 28, 20215 yr Author Personally now clear of the pad. Although the original road closures have now elapsed. So looking like no go today. EDIT: Aparently Elon is currently on the phone to the FAA to try and get launch clearence. 😁 Edited January 28, 20215 yr by martin-w
February 2, 20215 yr Author I'm not sure if anyone is interested or not, so this will be my last reply, unless there's interest. SN9 is on for the launch today. Crane has now been removed prior to launch. Finally SpaceX has FAA approval. Bit of a mystery what was gaping on there with the FAA, lots of speculation. SN10 is also on the pad, so shouldn't be too long after SN9 takes to the skies that we see SN10 doing the same. Roughly two hours from now the launch. Edited February 2, 20215 yr by martin-w
February 2, 20215 yr Maybe third time lucky?? Christopher Low AMD Ryzen 7 9800X3D CPU / 64GB DDR5-6000 RAM / 12GB Nvidia RTX 4070 Super GPU / Gigabyte X870E Aorus Elite Wifi 7 / 1+2TB Samsung Evo Plus M2 Nvme UK2000 Beta Tester
February 3, 20215 yr 3 hours ago, Christopher Low said: Maybe third time lucky?? Well, this approach (perfecting it by blowing it up) did put the Russians in space before the Americans; who had lost a whole lot of rockets too. They`ll sort it out. They`re rocket scientists, after all.
February 3, 20215 yr Personally, I do think that the "swing" from the belly flop position to the landing position is quite violent for a large rocket like Starship. I dread to think what it would feel like for the astronauts! Christopher Low AMD Ryzen 7 9800X3D CPU / 64GB DDR5-6000 RAM / 12GB Nvidia RTX 4070 Super GPU / Gigabyte X870E Aorus Elite Wifi 7 / 1+2TB Samsung Evo Plus M2 Nvme UK2000 Beta Tester
February 3, 20215 yr Author 1 hour ago, Christopher Low said: Personally, I do think that the "swing" from the belly flop position to the landing position is quite violent for a large rocket like Starship. I dread to think what it would feel like for the astronauts! I don't think the forces on the crew would be that high to be honest. Takes about 3 seconds or so for the flip and the pivot point is quite high up the rocket. I have to say, I was a bit dubious about the flip to begin with, but both failures have been due to hardware failure rather than relating to the flip, first the header tank pressure and now it looks like a Raptor failed to ignite for the landing. I'm still unsure about this technique to be honest. Raptors have to be reliable in this respect, we cant have issues with them reigniting. Elon has said that there will be a multitude of unmanned cargo flights for Spaceship before he risks a crew. Again though, this wasn't about the landing, the gaol was to demonstrate control and sub sonic reentry. So successful in that respect. Edited February 3, 20215 yr by martin-w
February 3, 20215 yr SN8 at least managed to flip into the vertical (slightly beyond in fact, but it was corrected) and was beautiful to watch, but the SN9 fireball was rather spectacular! 🍻 Mark Robinson Part-time Ferroequinologist Author of FLIGHT: A near-future short story (ebook available on amazon) I made the baby cry - A2A Simulations L-049 Constellation Sky Simulations MD-11 V2.2 Pilot. The best "lite" MD-11 money can buy (well, it's not freeware!)
February 3, 20215 yr It's not like they were word not allowed... 🙃 https://arstechnica.com/science/2021/02/as-starships-crash-understand-this-is-a-stupidly-difficult-thing-to-do/
February 4, 20215 yr Moderator Honestly, I think the whole concept of recovery using this method is fundamentally flawed. I believe that they need to begin the vertical re-orientation much earlier allowing it longer to stabilize, thus giving the engines longer to slow the thing down. Fr. Bill AOPA Member: 07141481 AARP Member: 3209010556 Avsim Board of Directors | Avsim Forums Moderator
February 4, 20215 yr Author 44 minutes ago, n4gix said: Honestly, I think the whole concept of recovery using this method is fundamentally flawed. I believe that they need to begin the vertical re-orientation much earlier allowing it longer to stabilize, thus giving the engines longer to slow the thing down. Fuel is the limiting factor though. Hence the low altitude that the flip takes place. They wont be able to afford to flip and burn at a higher altitude in terms of fuel capacity. Don't forget, it is intended to take 100 metric tons into orbit. SN8 and SN9 failed due to a header tank issue and a Raptor that failed. So nothing to do with the height the flip and burn commenced. The flip and burn for Mars will occur at about 800 feet. I know the way you feel though, it does make me raise an eyebrow. It just looks risky. 🙂 There s Mars landing animation below. https://www.spacex.com/vehicles/starship/ https://www.spacex.com/media/starship_users_guide_v1.pdf Edited February 4, 20215 yr by martin-w
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