SSTO takeoff problems

[pulp_user]

Hi Guys,

i need some help with an SSTO I'm currently woking on. I get it into Orbit and all that kind of stuff but somehow my spaceplane has a drag to the right at the very start of the flight. I built everything symetrically and it doesn't do this once it has taken off. I'm using 0.21 Mechjeb and 0.21 B9 Aerospace Pack. The landing gear itself is stock.

This is an attempt that has a very low drag to the right:

The problem is that the airintake, the wheel is mounted on, is not very durable during a rough landing. But if i don't mount the front wheel on the airintake like this:

the drag increases like crazy.

These two are as unstable as the 2nd one. If you don't steer it leaves the runway halfway and crashes:

Here is one image of the whole SSTO:

I hope that the images work .

I'm sorry if this is a noob problem, I'm still quite new to KSP, espacially to SSTOs. The only idea I'have about this is, that the lights of the wheels are all facing to the right. So they aren't flipped like all the other parts. But I can't do anything about that without them facing to the wrong direction.

regards Simon

[Hodo]

Ok I had this problem once a long time ago.

You can get rid of those pylons that your gear is attached to. I found that if I strut the back of the intakes to what ever they are connected to it will make them FAR more durable for gear work. I like to use 2 struts connected at the back sides of the intakes and then to the section it is connected to. I also use the Variable Geometry intakes for most of my intake work now. They create the least amount of drag and are most useful at higher speeds. And you really don't need that many intakes with a SABRE engine. The four variable geometry intakes you have under the wings will do fine.

[pulp_user]

I thought the more intake the higher I can fly without switching to oxidizer? So the engine will flameout on a lower altitude if I take away the intakes, won't it?

[Hodo]

I thought the more intake the higher I can fly without switching to oxidizer? So the engine will flameout on a lower altitude if I take away the intakes, won't it?

With a 3:1 intake to Jet ratio you can get to around 24-28km altitude without flame out. You will need to be going fast... REAL fast. Ideally over 1600m/s before you switch over to rockets. But if you just have one SABRE M you will need a minimum of 3 Variable Geometry intakes to make it to 24km. The SABRE M is a REALLY powerful engine and it sucks the fuel.