* Posts by mtakala82

4 posts • joined 8 Jan 2016

Cocky SpaceX will try another sea landing with next rocket launch


That video is a year old, with outdated graphics, and purely notional.

They aren't going to panel up the former Shuttle Fixed Service Structure as depicted; it would be costly and wouldn't actually do much to protect it.

It has been calculated at the Nasaspaceflight.com forums that Falcon 9 Heavy using Falcon 9 FT booster performance (best estimate) will not be economical if the center core arrives at the landing site. It becomes sensible rocket only if the center core lands on the barge.


In addition, the barge landings generally do not do the 180 degree turn to boost back to launch site. Barge landing Falcon 9 will do a boostback burn just to target to the landing platform, then a re-entry burn and landing burn as it does with land landings. The boostback burn is the one that consumes the most propellant.


Three points:

1) The return to launch site (land) landing requires a lot of performance reserve, that is not available for a lot of missions to be flown on the Falcon 9 FT rocket version. Those flights will just have to satisfy to a barge landing in the future as well.

2) Future Falcon 9 Heavy rocket version will have three booster cores. The side boosters will return to land after separating from the launcher, but the center booster core will continue to so high velocity, that it does not have margin to land on land. That center booster will continue to do barge landings.

3) This Jason 3 launch is being performed on the older version (Falcon 9 1.1) rocket which has less performance than the one that flew before the holidays (Falcon 9 FT). But even if it had Falcon 9 FT, it might not have enough performance to do a land landing on this flight.


Re: They land back to earh requires an ungodly amount of fuel

Launching towards East from the West Coast is not possible for any launcher, as flight over populated area is prohibited. Any mishaps would be dangerous!

West Coast launches are performed generally towards directions in between South and West which enable polar orbiting flights and retrograde orbits. Flying to those orbits is not possible from the East Coast (Florida) because exactly the same reasons.

The SpaceX-assigned Landing Pad next to the launch pad at the west coast is currently occupied by a temporary building in where SpaceX is doing something that has not been revealed yet.


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