launch - What happens to the Falcon 9 second stage after payload ...
Jan 15, 2015 · Reality bit them harder than expected, and they are focused on the next booster (BFR - Big F-ing Rocket, using Raptor engines) and its second stage for reuse. A second …
Why does the Falcon 9 use RP-1/LOx and not LH2/LOx?
Jun 13, 2018 · It's quite a bit bigger than most other second stages and has a lot more thrust. A hydrogen powered F9 second stage would require much more powerful engine than the typical …
How do second stage rockets ignite their engines?
Feb 28, 2022 · $\begingroup$ The ullage motors are not the second stage ignition system. The intent of ullage engines is twofold: To prevent the first stage from colliding with the second, …
What fuel is used in the second stage of orbital launch vehicles?
Dec 16, 2017 · Propellants of second stage varies from UDMH to RP1. Usually propellant is selected on the basis of required characteristics of launch vehicle, its efficiency, and its ease …
spacex - Could Falcon 9 push the second stage a little longer after ...
May 12, 2023 · The first stage only adds momentum (and speed) to the second stage if the first stage is itself still accelerating. What that does mean is the first stage can burn longer if it is …
Developing intuition about altitude and velocity in multi stage …
Sep 28, 2022 · The single stage rocket: $$\Delta v = 282s \cdot 9.81m/s^2 \cdot \ln{\left(\frac{580698kg + 26226kg}{26226kg}\right)} = 8690m/s$$ With a thrust to weight ratio …
Why do Proton rockets use two types of main engines in its …
Jun 17, 2015 · The second stage of Proton (8K-82K) rocket has two types of main engines (RD-0210 and RD-0211). Does someone knows why?
Optimum velocity for first stage separation in a two-stage launcher
Jul 10, 2015 · So, there is a relatively broad optimum where the first stage has around 80% of the mass of the total rocket and the second stage is responsible for around 60% of the total …
What happens to the parts of rockets after they burn up?
Apr 5, 2022 · Second stages either burn up or are cast adrift in orbit. Any rocket stage that ends up at high sub orbital velocity is likely to disintegrate due to frictional forces which will reduce …
Main reasons for a 2nd burn of a 2nd stage in Earth orbit?
Oct 6, 2020 · For SpaceX specifically, the second stage reaches LEO, then, if the satellite like Starman wants to go beyond LEO, they fire the engines to put them in a transfer orbit about …