When trying to grav turn spaceship spins out

[linkwinner]

When I'm trying to grav turn at 10km to get a rocket ship into orbit it starts to fall to the side and I cant control it.

(I'm on kerbin launch pad)

Edited January 22, 2017 by linkwinner

[Foxster]

You have some fins on the back end?

[ForScience6686]

You are using an old method.  You need to begin your gravity turn right off the pad.  Then just let it slowly fall to three horizon.  Most people say you should be at 45° @10-15km.  It will take some practice to get good at it, but it should only take a few degree nudge once you've stated moving.

[Benoit Hage]

It is also worth noting that if you have an angle of attack too steep (as in, you're pointing too far away from the direction you're going at), you will create a lot drag on the side of your rocket which make rockets flip during the gravity turn.

As said above, add a lot of control authority like canards at the bottom end of the ship and try to begin your gravity turn as soon as you have taken off and let it gently fall to the desired direction.

Edited January 22, 2017 by Benoit Hage

[ForScience6686]

Please keep in mind, while fins do help, it can be done without them with proper rocket design and fuel flow.  Set the priority of your fuel tanks to drain from the bottom first in a stack.  This keeps your mass forward helping to prevent flips.

[linkwinner]

I have been trying to do the gradual grav turn but I am very bad at it  Any tips or instrucions?

(I do have orbit but I have less fuel than I needed, sadly I don't have docking ports so I need to restart the mission.)

 

 

 

Edited January 23, 2017 by linkwinner
Update

[Hodari]

12 hours ago, linkwinner said:

I have been trying to do the gradual grav turn but I am very bad at it  Any tips or instrucions?

 

 

 

It's going to vary a little bit with each rocket design, so it'll take some practice and it's hard to give overly specific instructions.  Make sure your TWR is reasonable(somewhere between 1.2-1.8 is probably good) and start your turn at about 50-100m/s to start out with, see how it goes, and then if it didn't work, make adjustments and try again from there.

[Spricigo]

5 hours ago, Hodari said:

It's going to vary a little bit with each rocket design, so it'll take some practice and it's hard to give overly specific instructions.  Make sure your TWR is reasonable(somewhere between 1.2-1.8 is probably good) and start your turn at about 50-100m/s to start out with, see how it goes, and then if it didn't work, make adjustments and try again from there.

This.

A good design is one that you can just launch with a few degrees of inclination and it will do a gravity turn by itself or with help of SAS set to prograde. It takes time to be able to do it consistently but is also very rewarding.

[ajburges]

On 1/23/2017 at 6:42 AM, Hodari said:

It's going to vary a little bit with each rocket design, so it'll take some practice and it's hard to give overly specific instructions.  Make sure your TWR is reasonable(somewhere between 1.2-1.8 is probably good) and start your turn at about 50-100m/s to start out with, see how it goes, and then if it didn't work, make adjustments and try again from there.

Third.

My favorite launchers are SRB first stages that launch at 1-2° and 60-80% thrust with no SAS. I only exercise control to correct heading/inclinàtion. Then engage prograde follow for stage 2.