How will SpaceX achieve landing of the Falcon 9 first stage?

July 9, 2017 – 08:45 am

After the first stage main engine cutoff, cold gas N2 thrusters are used to rotate the booster into the direction of flight, they reignite 3 of the Merlin 1D engines. (With 9 in the Octaweb alignment, the center and two on either side of it allow a 'line' of engines to fire).

They use this to kill forward momentum. They continue arcing upwards (since vertical and horizontal momentum components are independent) until they start falling down again.

Finally they use the hypersonic grid fins at the top of the upper stage, the cold gas N2 thrusters in combination to try and steer the booster to its target. Time will tell if they have sufficient control to hit a small target that's 300 feet long by 170 feet wide (91 by 52 meters) precisely enough for Falcon 9's leg span of about 70 feet (21 meters).

Once they approach their landing surface, in the last few seconds (10-30 seconds?) they re-ignite the central Merlin 1D to decelerate from terminal velocity to a landing. Hopefully down to 4.5 mph (7.2 km/h) at the time of touchdown, a number that was mentioned during the recent CRS-5 pre-launch news conference. If not, bad things happen.

scam capital


NASA Commercial Crew Human Spaceflight Program for Transport to the International Space Station (ISS): SpaceX Dragon and Boeing CST-100 Contracts, Safety Reviews, History and Update Reports
eBooks (Progressive Management)

You might also like:

Spacex Crs 6 Launch And Falcon 9 First Stage Landing
Spacex Crs 6 Launch And Falcon 9 First Stage Landing
SpaceX - Falcon 9 First Stage Re-Entry Rocket Coming Back
SpaceX - Falcon 9 First Stage Re-Entry Rocket Coming Back ...
SpaceX Falcon 9 First Stage Ocean Landing
SpaceX Falcon 9 First Stage Ocean Landing
NASA's Commercial Orbital Transportation Services: A New Era in Spaceflight - History of International Space Station (ISS) Cargo and Crew, SpaceX, Orbital Sciences, Bigelow
eBooks (Progressive Management)
ACESR Spacex Year Of The Dragon Mouse Pad / Mouse Mat / Mousepad / Mousemat
Office Product (ACESR)
  • Excellent tracking for all mice
  • Smooth Cloth Surface
  • Non-skid base securely holds the mouse pad in place
  • Create Personalized Photo Mouse Pads
  • Dye Sublimation imprinted
SamSingl Samsingl Women Spacex Dragon Capsule Flip-flop 5.5 B(m) Us Rubber Colorful
Sports (SamSingl)
  • Cozy, beach-ready
  • SamSingl
  • Cozy, beach-ready sandal
  • Women
ACESR iPhone 6 Plus Case, Spacex - Year Of The Dragon Iphone Customize Photo Case for iPhone 6 Plus 5.5inch with TPU Black Border
Wireless (ACESR)
  • Designed for the Lastest iPhone 6 Plus(5.5inch), NOT for Apple iPhone 6 (4.7inch)
  • Durable TPU Materia
  • Access to all ports, controls & sensors.
  • Create a custom case with your favorite photos and designs
  • Thermal transfer, Photo Printed in the plastic plate

Related posts:

  1. SpaceX Falcon 9 v1.1 YouTube
  2. SpaceX Falcon 9 Capsule
  3. SpaceX Falcon 9 First Flight
  4. SpaceX crs-3 First Stage