My plane does backflips

[Bluejayek]

I am trying to make a plane to piggy back a small orbital rocket on. However, whatever I seem to do the plane just does backflips after takeoff and crashes. Can anybody give tips?

[RedDwarfIV]

SAS.

[Letum]

ASAS

[AD-Edge]

Adjust center of gravity

[Bluejayek]

Adjust center of gravity

How specifically. I tried just extending the plane forward with more fuel tanks, and it didnt make a difference.

[Kosmo-not]

The canard seems to always be the issue. You can mount it further back in the plane and see if that helps.

The other thing you can do with it is flip it 180°.

[RC1062]

Have you tried moving to rocket part forward? The rocket fuel is very dense and would be best suited right over the centre of mass of the plane.

[Gojira]

IT\'S A FRONTFLIP

But yeah, ASAS and RCS.

[RC1062]

IT\'S A FRONTFLIP

But yeah, ASAS and RCS.

I am trying to make a plane to piggy back a small orbital rocket on. However, whatever I seem to do the plane just does backflips after takeoff and crashes. Can anybody give tips?

I think it is doing a front flip...

[Kosmo-not]

I flipped the canard around like shown in the attached picture, and that did the trick.

[Bluejayek]

I flipped the canard around like shown in the attached picture, and that did the trick.

Thanks. Working now, even if I have no idea why that makes a difference. The aerodynamic way seems to me the pointy side forward...

[vexx32]

It probably just gives a greater degree of control that way... or it would, if KSP had fluid simulation for air flow. No clue as to why it would with the physics engine it uses, though.

[Tim_Barrett]

You have too much air getting under the front wings when your alter your pitch the slightest bit. To make them be more of the part that is being 'dragged' through the air, either move them back or extend the fuselage.

It\'s pretty much the same way how you cannot easily back up a truck with it\'s cargo connected by a hinge; you will fishtail, if you know what I mean.

[boolybooly]

I would comment the top advanced canards are dragging the top backwards as is the piggy back ship, you need to counter that not increase it. If you cant move the payload you can still move the adv canards, preferrably below the center of mass.

Also since the center of mass is above the vector of thrust this also produces back flip torque, you could try angling the connectors carrying the outer nacelles so that the outer nacelles are raised up and are closer to the center of mass, that should reduce the torque but the bottom nacelle will still produce some.