I wonder does is possible to go into space with as many Gs as possible

[Pawelk198604]

I wonder why when i watched space shuttle launch the Gs was low at first than increased than lower again, and than increase again.

I wonder does is possible to make into orbit with 2 Gs instead of 3?

[Thomassino]

Yes it is. The Space Shuttle could make an orbit if one or two of its main engines failed during the launch. However, this was possible only when it was already travelling very fast in space. If an engine failed during atmospheric flight, they had multiple abort scenarios.

It had fortunately happened only once on STS 51-F ... RS-25 is a reliable beast

Edited August 30, 2015 by Thomassino
Engine malfunction update

[MinimumSky5]

The G loading increased at first as the fuel remaining in the shuttle stack went down. This means that a similar force from the engines was pushing on a smaller mass, causing a bigger acceleration. The G forces went down later when the shuttles boosters were detached, so less force was pushing on the vehicle. The engines themselves get throttled down about a minutes before the external tank gets jettisoned, to stop the crew and the orbiter experiencing high G loads.

[Shpaget]

Any acceleration that can match the gravity and then just a little bit more (>1G) is enough to get you into orbit, provided you can maintain it for long enough.

[PB666]

Any acceleration that can match the gravity and then just a little bit more (>1G) is enough to get you into orbit, provided you can maintain it for long enough.

SLS accelerrated just below 2 g until just below Mach, them powered down SSME to control maximum dynamic force......g + F_{dra g} . If you want to accelerate faster you need to lower the coefficient of drag on your leadind parts and make sure the rocket in front of the engine has a general fusiforms shape.

[FishInferno]

It had never happened though... RS-25 is a reliable beast

Actually it did once. On one mission a single engine failed and they had to ATO (abort to orbit), which means they disregarded the mission parameters and went directly into orbit even if it wasn't the planned orbit. But I elieve that they were able to complete all objectives of the mission regardless.

[Thomassino]

Actually it did once. On one mission a single engine failed and they had to ATO (abort to orbit), which means they disregarded the mission parameters and went directly into orbit even if it wasn't the planned orbit. But I elieve that they were able to complete all objectives of the mission regardless.

You are right, sir. I looked it up, and it happened on STS 51-F. Thanks for pointing it out.

[KerikBalm]

STS accelerrated just below 2 g until just below Mach, them powered down SSME to control maximum dynamic force

Fixed that for you.

[ChrisSpace]

If you have near-infinite Dv you could reach orbit with a TWR of 1.00001

[SAI Peregrinus]

If you have near-infinite Dv you could reach orbit with a TWR of 1.00001

Actually you can get away with a TWR quite a lot below 1 in that case, via a spaceplane design. As long as it can lift off and fly horizontally it can gain velocity and altitude and eventually reach orbit. Or just go for the very long duration "just move the whole planet" version.

[Lukaszenko]

If you have near-infinite Dv you could reach orbit with a TWR of 1.00001

Or even a TWR of 1.00000

You'd could just have a guy come up and give it an initial push off the launchpad, and it would just keep that speed all the way up. But then again, if you have near-infinite Dv, you wouldn't even need to reach orbit. You could just fly up to space and hover there for as long as you need.

[Windspren]

Or even a TWR of 1.00000

You'd could just have a guy come up and give it an initial push off the launchpad, and it would just keep that speed all the way up. But then again, if you have near-infinite Dv, you wouldn't even need to reach orbit. You could just fly up to space and hover there for as long as you need.

Yay stereotype rocket! When the engine turns off, it falls down!