CLEARANCE: Top Secret
- Aug 13, 2007
- Reaction score
Musk tweeted those picture about Dragon 2
Again his sense of humor...
Again his sense of humor...
In a burst of activity that should probably be expected at this point but still feels like a complete surprise, SpaceX technicians took a major step towards completing the first Starship hopper prototype by combining the last two remaining sections (aft and nose) scarcely six weeks after assembly began.
Anybody know why they don't snag them out of the air the way the USAF grabs drones with helicopters?fredymac said:Fairing catch practice. I would guess the parachute guidance aims at a fixed GPS location but winds are too strong. I wonder if they can switch to a homing beacon from the ship or update the GPS aim point in realtime so it matches the ship.
Spacex twitter link:
Meh. You're adding systems. A ship *should* be able to catch the fairings, especially with guided parafoils. It'll just take practice. And if you can do it with ships, then choppers are extraneous.sferrin said:
Agreed. They just seem to be having difficulty making it work.Orionblamblam said:Meh. You're adding systems. A ship *should* be able to catch the fairings, especially with guided parafoils. It'll just take practice. And if you can do it with ships, then choppers are extraneous.sferrin said:
https://twitter.com/RogerLewisHolt/status/1083267259785719810Roger Holt @RogerLewisHolt
The Join is complete , no crane! @John_Gardi @Avron_p @JaneidyEve @DrPhiltill @austinbarnard45
:Tyler Thomas Rasmussen
2:40 AM - Jan 10, 2019
On NSF they have some close-ups of what looks like a tank bulkhead weld as seen on the outside.Orionblamblam said:Were any *innards* ever observed being installed? You know, tanks and lines and pumps and and all the rest?
Looking at that again I wonder if just making the parachute a bit bigger to slow it's decent would help.Orionblamblam said:Meh. You're adding systems. A ship *should* be able to catch the fairings, especially with guided parafoils. It'll just take practice. And if you can do it with ships, then choppers are extraneous.sferrin said:
Unknown, they built the thing with a concrete shell around the base, so we didn't even see the nozzles (regardless of whether they're attached to any engines) get inserted before it was raised and placed elsewhere.Orionblamblam said:Were any *innards* ever observed being installed? You know, tanks and lines and pumps and and all the rest?
https://twitter.com/elonmusk/status/1081572521105707009Engines currently on Starship hopper are a blend of Raptor development & operational parts. First hopper engine to be fired is almost finished assembly in California. Probably fires next month.
[Posted on the 6th of Jan]Adrian @LPAmdee
How long until the first hopper test. What do you think?
Elon Musk @elonmusk
Replying to @LPAmdee
Aiming for 4 weeks, which probably means 8 weeks, due to unforeseen issues
Kinda counter -intuitive, but possibly need the opposite.sferrin said:Looking at that again I wonder if just making the parachute a bit bigger to slow it's decent would help.Orionblamblam said:sferrin said:
Or make the 'chute steerable._Del_ said:Kinda counter -intuitive, but possibly need the opposite.sferrin said:Looking at that again I wonder if just making the parachute a bit bigger to slow it's decent would help.Orionblamblam said:sferrin said:
Bigger actually makes you more susceptible to wind drift. But it'd definitely work if they never launch when it's windy out at sea downrange
https://twitter.com/austinbarnard45/status/1083831714152177665So I was able to get a bunch of clear shots of the raptors and the “bulkhead,” there is also an envoy of cement trucks and I counted 12 already on the launch pad tilling the cement in the back of the trucks waiting until their gonna start poring i have to guess.
The nice border patrol agents at the check point that I just became friends with have just informed me that this upcoming Monday is when their going to take apart the hopper and insert the fuel tanks.
kitnut617 said:The article in Microsoft News says the layoff is partly because of the downturn in companies wanting to launch satellites.
Should have added that each launch is capable of multiple deployments (the SpaceX launch before the New Year had 60 satellites on board), which means there would be less launches. At least that's what the article insinuated.sferrin said:
New drone photos of the hopper.Ask and you shall receive! Here's an image with the mighty #SaturnV compared to the @SpaceX's upcoming #Starship and #Superheavy stack! Really gives a sense of scale how truly massive the rocket will be!
This and many of my other renders are now also available at my shop!
I don't think either (tank). But if their intend is to test the specific reentry manoeuvre (horizontal decent + 90deg rotation before starting the boosted recovery), they will need to reach a representative initial speed for the test, hence the high impulse request necessitating the 3 engines. Also, for the Mars mission, a supersonic pitch up + relight would have to be performed, something that could be tested in the higher earth atmosphere. Hence (IMOHO) the design choices.Dragon029 said:I personally doubt they'll use any more than the lower portion as a tank:
Doing a very rough estimation of the Starhopper's internal volume there's roughly 1600m^2 potential tank volume, which, if filled with a 4:1 ratio of LOX & Methane, would give a fuel mass of about 1,600 metric tons. A single Raptor engine meanwhile (noting that figures are subject to change) puts out about 203 metric tons (1993kN) of thrust; 3 of them simply could not lift the entire Starhopper if it was filled.
Also, while this is just speculation, some have suggested that the Starhopper may have 3 engines in order to test engine-out landing capability, which would require 2 engines to still achieve a >1 T:W.
And then lastly, you have to keep in mind that the real Starship will have something like 40% of its forward length as empty / dry mass (with the weight of payload, passengers, etc being significantly lighter than fuel). Although this Starhopper isn't meant to test re-entry or be a 1:1 analogue, it would be beneficial to have a ballpark-similar centre of gravity for getting relevant control dynamics data.