orbit

[iandward]

what the best % to get in to earth obit

[Ted]

Could you expand on your question a bit? I'm not entirely sure what you mean.

[Vanamonde]

With my example rocket and walkthrough? http://forum.kerbalspaceprogram.com/showthread.php/25008-How-to-reach-orbit-and-a-rocket-that-can-do-it-a-walkthrough-for-newbies

[Godot]

I don´t think that you will be able to get into earth orbit ... Kerbol and its planets are in another universe than earth and AFAIK Kerbal technology isn´t developed enough to cross the boundaries between the universes

[Nibb31]

Percentage of what ?

[Xenonclave]

I'd say around 4%.

No but seriously what exactly is the question?

[iandward]

im trying to get in to obit but whats the best way to do this

[1001sd]

Maybe he means the inclination?

If you try to get in orbit, then Vanamonde's thread can help you. (The same can a video from Scott Manley (search for him on youtube), and there is an orbit tutorial on the wiki too.)

[UNSC]

For the very basic way, burn upwards to 100K, then burn right until you are in orbit. This is highly inefficient, but easiest to pilot.

[Nibb31]

After launch, start tilting the rocket

towards the East, very slowly, so that you reach a horizontal position when you reach 70000m.

To reach orbit, you want horizontal speed more than altitude. Reach 2300m/s, and you will be in orbit.

[karolus10]

I think that he/she is talking about payload fraction: how much mass of the rocket end up on orbit... right ?

[Specialist290]

I think that he/she is talking about payload fraction: how much mass of the rocket end up on orbit... right ?

If that's the case, then there's the Rocket Equation, which is explained here quite well in layman's terms. This other page on the same site explains how to apply it to multistage rockets.

Note that you need roughly 4500 m/s of delta-v to reach stable orbit from Kerbin's surface, assuming ideal piloting.

[Kegereneku]

I think that he/she is talking about payload fraction: how much mass of the rocket end up on orbit... right ?

I though the same at first, but someone who can't formulate a complete sentence to explain his problem cannot be thinking about a complicated concept like this.

Seriously iandward, we all want to help you, some with finely-crafted step-by-step explanation, but you'll have to explain your situation.

Else I can only give you tips :

- Use high-thrust engines first

- Use staging to get rid of mass as you discard empty fuel-tank.

- Don't forget to turn along the ascent to gain horizontal speed

- Last : don't be afraid of low-thrust engines once you approach the apogee (apoapsis) because they are more economic

The idea or orbiting is to gain so much horizontal speed that even if you "fall" you"ll miss the ground continuously.

[Atanar]

After launch, start tilting the rocket

towards the East, very slowly, so that you reach a horizontal position when you reach 70000m.

To reach orbit, you want horizontal speed more than altitude. Reach 2300m/s, and you will be in orbit.

That's nonsene. Tilting your rocket before you are out of the thick part of the atmospshere means you sacrifice a lot of your intended horizontal velocity to drag.

[Nibb31]

That's nonsene. Tilting your rocket before you are out of the thick part of the atmospshere means you sacrifice a lot of your intended horizontal velocity to drag.

Did I say to tilt it to 45° at launch? No. You can start a very slight 1 or 2° tilt to the east as soon as you launch. What you lose in drag, you gain in horizontal speed.

When you go straight up to 15000m and tilt 45° in one go, as some people suggest, you might gain a little bit of energy by getting out of the thickest part of the atmosphere slightly quicker, but you lose a whole lot more by converting your vertical speed to horizontal speed.

The most efficient flight path is a curve that starts at launch and ends at the limit of the atmosphere. Of course, this isn't easy to control manually.