All Questions
Tagged with accelerationrockets
8 questions
5votes
2answers
528views
Are rockets deliberately throttled back towards the end of the burn to spare crew and airframe g-forces?
Throughout its burn, a rocket gets lighter as propellant is consumed. As a result, acceleration (and g-force) increase. In the shuttle, the SSMEs were throttled back towards the end of the burn ...
- 33k
3votes
2answers
2kviews
How to account for burned fuel mass when calculating spacecraft acceleration?
I thought I could simply remove half of the burned fuel mass to account for the mass lost during the engine burn. But I could not find a Newton's Second Law formula Calculator that would allow that, ...
0votes
1answer
160views
Thrust & acceleration produced by a rocket engine
For given propellants, with their mass flow decided by the rpm of the turbo pump, what decides the thrust and acceleration produced by a rocket engine? Can we control them independently?
- 3,806
3votes
0answers
151views
How fast can a rocket with constant thrust but changing mass travel a linear distance with limited delta V?
Background I am developing a game / simulation that has spacecraft with advanced albeit at least not physically impossible drives travelling in the solar system. As operation time should be far more ...
- 31
25votes
6answers
6kviews
Why do rockets have multiple stages?
I guess, almost all the rockets have multiple stages. But, I was wondering, why do they have multiple stages? Couldn't they have just 1 stage? With more stages, they would require more engines (...
0votes
1answer
777views
How much anti-matter is needed for an anti-matter propelled rocket to reach $P$ % ($P\lt{100}$) of the speed of light (c)?
I think this is a tough one. Imagine a rocket is produced which is propelled by a matter-anti-matter device. Its sole purpose is to reach high velocity. Which means the mass can be kept low, say $m$ ...
6votes
2answers
19kviews
How do I calculate a rockets burn time from required velocity?
Say my rocket could produce F newtons of thrust while consuming M1 kilograms of fuel per second. It's mass at start is M0, and it keeps burning until it reaches V velocity. How would I find out the ...
- 123
14votes
2answers
6kviews
SpaceX rocket strange velocity
In SpaceX launch on May 1st, 2017, we get to see the full flight path of the first stage rocket of the falcon 9 from launch to land: It accelerates to around 1685m/s ...
- 143
