one

and let down Falcon 9. Go SpaceX

>> vehicles.

>> M1 chamber pressures nominal.

>> Starlink mission 17 and 40. SpaceX's

Falcon and rocket launched 24 Starling

satellite to low Earth orbit from space

launch complex 4 east at Wendenburg

Space Force Base in California. This was

the 17th flight for the Falcon 9 first

stage booster supporting this mission

which previously launched NOL 126

transporter 12 SPHR

NOL57

and 12 Starlink missions. Following

first stage separation, the first stage

booster landed on the off course lab

drone ship which was stationed in the

Pacific Ocean.

Falcon 9 first incorporate nine Merlin

engines and aluminium lithium alloy

tanks containing liquid oxygen and

rocket grade kerosene propellent. Falcon

9 generate more than 1.7 million pounds

of thrust at the sea level. The nine

Merlin engines on the first stage are

gradually throttled near the end of the

first stage flight to limit the launch

vehicle acceleration as the rocket's

mass decreases with the burning of fuel.

These engines are also used to reorient

the first stage prior to re-entry and to

deacelate the vehicle for landing.

Merlin is a family of rocket engines

developed by SpaceX for use on its

Falcon 1, Falcon 9 and Falcon Heavy

launch vehicles. Merlin engines use a

rocket grade kerosene propellent and

liquid oxygen as a rocket propellant in

a gas genator power cycle. The Merlin

engine was originally designed for

recovery and reuse. Merlin vacuum

features a larger exhaust section and a

significantly larger expansion nozzle to

maximize the engine's efficiency in the

vacuum of space. Its combustion chamber

is regeneratively cooled while the

expansion nozzle is radiatively cooled.

At full power, the Merlin vacuum engine

operates with the greatest efficiency

ever for an Americanmade hydrocarbon

rocket engine. The Falcon 9 first stage

is equipped with four landing legs made

of state-of-the-art carbon fiber with

aluminium honeycomb placed symmetrically

around the base of the rocket. They are

stubbed at the base of the vehicle and

deployed just prior to landing.

The interstage is a composite structure

that connects first and the second

stages and houses a panometic pusher

that allow first and the second stage to

separate during flight. Falcon 9 is

equipped with four hypersonic grid fins

positioned at the base of the

interstage. They orient the rocket

during re-entry by moving center of

pressure. The second stage powered by a

single Merlin vacuum engine delivers

Falcon 9's payload to the desired orbit.

The second stage engine ignites a few

seconds after the stage separation and

can be restarted multiple times to place

multiple payloads into different orbits.

Made of a carbon composite material, the

fairing protect satellite on their way

to orbit. The fairing is jettisoned

approximately 3 minutes into flight and

SpaceX continues to recover fairing for

reuse on its future missions.

All 24 Starling satellites are

encapsulated in a 13.1 m high and 5.2 m

diameter fairing. Later SpaceX confirmed

the deployment of all 24 Starling

satellite launched on its mission 17 and

40.

>> Stage two is in terminal guidance.

Stage one landing light deploy.

Stage one landing confirmed.