• Visit 'Mars' in Space.com's new 'Space Traveler' mini-documentary - Watch here! 🚀

Why does space x waste time and money with landable boosters

Dec 6, 2020
3
0
10
These silly landable boosters reduce top speed and or payload and no matter what Musk says they are not less expensive as they cost 5 to 10 times more to build and need fuel to land that has weight which impacts the mission.

So why?
 
Dec 9, 2020
1
1
10
These silly landable boosters reduce top speed and or payload and no matter what Musk says they are not less expensive as they cost 5 to 10 times more to build and need fuel to land that has weight which impacts the mission.

So why?
I'd suspect your analysis is wrong, where do you get your numbers from?

The fuel used to land is kept to a minimum so the impact of extra fuel is minimal and minimized. Thurst to weight ratio isn't an issue as is demonstrated by the fact they throttle down before the stresses on the rocket are too great.

Reuse is key, it's why almost everyone is pursuing it
 
  • Like
Reactions: BoxCar
Dec 22, 2020
2
0
10
It will be great if rocket had some catalytic converter to create fuel, as it landed or possibly take off, from atmosphere (H2, O2, CO2, and H2O)
 
Feb 18, 2021
4
0
10
I'd suspect your analysis is wrong, where do you get your numbers from?

The fuel used to land is kept to a minimum so the impact of extra fuel is minimal and minimized. Thurst to weight ratio isn't an issue as is demonstrated by the fact they throttle down before the stresses on the rocket are too great.

Reuse is key, it's why almost everyone is pursuing it
They are cutting too many corners why havnt they got any counter measures in place for when malfunction occurs

I personally would have had all the raptor engines on detachable links or an interchangeable belt with a backup centre above the 3 so it doesn't effect balance and weight as much as its in the center of craft

And do the flip a bit higher to allows counter measures to take place

The method they use to centre craft out before flip could of worked to correct sn9 if it had 2 thrusters on adjacent sides and boost to correct balance on over swing

I dont know why it dont just land like a plane and use crane to stand it up again

Reusable and wings could be folding into body and come out on landing
 
Mar 29, 2021
13
4
15
These silly landable boosters reduce top speed and or payload and no matter what Musk says they are not less expensive as they cost 5 to 10 times more to build and need fuel to land that has weight which impacts the mission.

So why?
Silly is a Mack tractor-trailer rig being
used for one job, then being junked.
 
  • Like
Reactions: BoxCar

Wolfshadw

Moderator
Apr 1, 2020
349
274
1,060
Silly is a Mack tractor-trailer rig being
used for one job, then being junked.
While I agree, a Mack tractor-trailer rig doesn't require an expensive retrofit after each use. I agree that we need reuseability, but I don't think SpaceX is anywhere near the cost savings it wants.

-Wolf sends
 
Mar 29, 2021
13
4
15
While I agree, a Mack tractor-trailer rig doesn't require an expensive retrofit after each use. I agree that we need reuseability, but I don't think SpaceX is anywhere near the cost savings it wants.

-Wolf sends
The refit isn't as expensive as manufacturing an entire new item.
$5K US per kilo to a 500km (311 mile) orbit.
A Falcon 9 booster recently completed it's ninth mission
 
Last edited:
Nov 20, 2019
13
3
515
These silly landable boosters reduce top speed and or payload and no matter what Musk says they are not less expensive as they cost 5 to 10 times more to build and need fuel to land that has weight which impacts the mission.

So why?
Indeed, you are correct. Space X and what ever the Chinese and Indians use, are basically just larger fireworks . There is a project in the UK called the Skylon Project . The aim is to use ram jets to take off like an aeroplane from an airfield and turn on the rockets at the edge of space . On the way up it scoops up, and stores, oxygen from the atmosphere which it uses to combine with on board hydrogen for the rocket motor. The big problem has been, so far, is that the speed in atmosphere makes the engines too hot. To get round that it quenches one thousand degrees Celsius to minus Celsius in a fraction of a second. That has been tested and proved by firing an American fighter jet engine straight at the cooling system. What they haven't said so far is how much power the air cooling system will require, I would have thought that must be significant
 
Feb 11, 2021
18
5
15
Why did you decide that the money SpaceX spends goes to waste? Why tell it to you? And even if it's true, everything SpaceX does now is an investment in our future. Engineers spend millions of dollars now to save money in the future.
 
Aug 29, 2020
17
10
15
U'd think in an Earth's atmosphere landing somehow they'd employ parachutes as part of the "Stages" of descent, then release them at final touch down> Why not, it's worked for ocean "splash downs" but when near the surface deploy the rockets to set down w/minimum fuel use
 

ASK THE COMMUNITY

TRENDING THREADS