Quote from: brainbit on 12/31/2017 02:33 pmIf they can do this then they may very well attempt to catch a Dragon2 with a net.I would say, not a chance!
If they can do this then they may very well attempt to catch a Dragon2 with a net.
First you need precision landing (800m doesn't cut it),
second it is several magnitudes heavier than a fairing half (how big/strong would the net have to be?),
third if it missed and hit the side of the ship, the crew could die.
Guided parafoil would solve all those problems. But would need a bunch of testing, so don't get your hopes up.
Quotethird if it missed and hit the side of the ship, the crew could die.The net appears to extend way over the side of the ship, see this picture. If the landing targets off center, and it misses the net, it will fall in the ocean.
In this video an Apollo text capsule is dropped on hard clay at 7 m/sec vertical and up to 15 m/sec horizontal velocity. The Avcoat heat shield doesn't look too bad, even when it's quite visible because the capsule winds up on its nose. This looks survivable, for well cushioned passengers, and a successfully slowed Dragon 2 would be going much slower with well controlled attitude.edit: Trying to link, but YouTube embeds.
Quote from: speedevil on 12/31/2017 12:30 pmQuote from: woods170 on 12/31/2017 11:54 amLet me put it this way. There is no sled on Cargo Dragon. Nevertheless, Cargo Dragon routinely splashes down within 2 miles from the recovery ships.Conclusion: you don't need a sled on Crew Dragon to make pinpoint ocean landings.<bing>'Please lean to the left'Don't be sillyThe sled was forward and back for controlling the angle of attack, not side to side.If they put the seats on slides like for rowing machines the passengers could move "up and down". They would be given some display panel graphic to follow.It would be a fun thing to do on reentry.And the first Dragon landed within a half mile of the target (800 meters), not two miles.Plenty accurate for ocean landings, it would appear.On a serious note, do you have any data, woods170, to back up the "routinely splashes down within 2 miles" comment or is that just an observation from the videos?SpaceX gave that 0.8 km value, and one or two more, IIRC, but then stopped.
Quote from: woods170 on 12/31/2017 11:54 amLet me put it this way. There is no sled on Cargo Dragon. Nevertheless, Cargo Dragon routinely splashes down within 2 miles from the recovery ships.Conclusion: you don't need a sled on Crew Dragon to make pinpoint ocean landings.<bing>'Please lean to the left'
Let me put it this way. There is no sled on Cargo Dragon. Nevertheless, Cargo Dragon routinely splashes down within 2 miles from the recovery ships.Conclusion: you don't need a sled on Crew Dragon to make pinpoint ocean landings.
Quote from: Comga on 12/31/2017 01:02 pm(snip)On a serious note, do you have any data, woods170, to back up the "routinely splashes down within 2 miles" comment or is that just an observation from the videos?SpaceX gave that 0.8 km value, and one or two more, IIRC, but then stopped.No public source to back up my statment, other than the public statements you refer to. However, I've discussed this with my own sources at SpaceX and they are the ones who gave me the "routinely within 2 miles from the recovery ships". And they should know given that one of them is routinely involved with Cargo Dragon recovery.Also, it is worth noting that 800 meters falls well within the "within 2 miles" part. Given how my SpaceX sources phrased their description of recovery I have reason to believe that no Cargo Dragon ever splashed down beyond 2 miles from the recovery ships.
(snip)On a serious note, do you have any data, woods170, to back up the "routinely splashes down within 2 miles" comment or is that just an observation from the videos?SpaceX gave that 0.8 km value, and one or two more, IIRC, but then stopped.
Quote from: Comga on 12/31/2017 07:52 pmIn this video an Apollo text capsule is dropped on hard clay at 7 m/sec vertical and up to 15 m/sec horizontal velocity. The Avcoat heat shield doesn't look too bad, even when it's quite visible because the capsule winds up on its nose. This looks survivable, for well cushioned passengers, and a successfully slowed Dragon 2 would be going much slower with well controlled attitude.PicaX is very different from Avcoat; it is much more brittle.
In this video an Apollo text capsule is dropped on hard clay at 7 m/sec vertical and up to 15 m/sec horizontal velocity. The Avcoat heat shield doesn't look too bad, even when it's quite visible because the capsule winds up on its nose. This looks survivable, for well cushioned passengers, and a successfully slowed Dragon 2 would be going much slower with well controlled attitude.
No public source to back up my statment, other than the public statements you refer to. However, I've discussed this with my own sources at SpaceX and they are the ones who gave me the "routinely within 2 miles from the recovery ships". And they should know given that one of them is routinely involved with Cargo Dragon recovery.Also, it is worth noting that 800 meters falls well within the "within 2 miles" part. Given how my SpaceX sources phrased their description of recovery I have reason to believe that no Cargo Dragon ever splashed down beyond 2 miles from the recovery ships.
Don't remember seeing this before, apologies if it's a duplicate. According to this article, SpaceX is leasing property at Area 59 from CCAFS as a home for Dragon.http://www.floridatoday.com/story/tech/science/space/2018/01/01/spacex-leases-cape-canaveral-home-crew-dragon/982606001/
"The model used in the investigation was a 1/4-scale dynamic model of the command module of the Apollo spacecraft. Detailed information of the model construction is given in reference 6 and model dimensions are given in figure 1. "The model was constructed of an aluminum frame to which an outer skin of approximately 1/8 in. (0.635 cm) (model scale) thick fiber glass and plastic was attached. The bottom of the crew compartment was filled with balsa wood to reduce structural vibrations. Mahogany blocks were inserted in the balsa wood to serve as accelerometer mounts...
(One of) These buildings. https://www.google.ca/maps/@28.4696037,-80.5786328,1019m/data=!3m1!1e3
This is where I think is the location. On a KSC map, it's called SATELLITE PROCESSING & STORAGE AREA. The entry road is called SATELLITE ROAD. It's on Flight Control Road east of Phillips Parkway, the major north-south artery through CCAFS.
Could Dragon 2 actually be launched now, or is it ready for human flight? I ask this question because of NASA delays, not just SpaceX delays. If so, why doesn't SpaceX go ahead and launch it unmanned for testing? Why the delays?
Is spacex currently online for the launch of the manned dragon in August?
Quote from: Nik Tmi on 01/03/2018 02:45 pmIs spacex currently online for the launch of the manned dragon in August?NASA has not publicly changed the dates, but some recent unofficial postings would suggest the answer is probably no.https://forum.nasaspaceflight.com/index.php?topic=37802.msg1766115#msg1766115https://forum.nasaspaceflight.com/index.php?topic=8184.msg1766457#msg1766457