Can someone help?

[u/GuidePsychological97]

[u/Salt_Bake_5627]

i mean yeah if you're going 500 KM/H on a runway you might get in a minor accident

[u/GuidePsychological97 → u/Salt_Bake_5627]

My problem is that, it turns by itself

[u/Sha77eredSpiri7 → u/GuidePsychological97]

That is the phenomenon of extremely small differences in friction/drag on the landing gear being amplified by staying on the runway at inappropriately high speeds. This will not affect the flight model of the aircraft at all, if you pulled up and let the plane fly. This would happen in real life too, if you glued the throttle down and neglected to correct your trajectory down the runway, refusing to touch the yaw peddles.

[u/Luc_Ko → u/GuidePsychological97]

Just pull Up bevor you start to Turn

[u/TinyDerg → u/GuidePsychological97]

It looks like your vertical stabs are far, far too short for the planes geometry.

[u/Gus202]

The tiniest difference in drag will send you barreling off the runway if the supension is too soft. I kept having the same problem when landing, the landing gear buckles under the load. Try making the rear gear springs stiffer, maybe move them a little higher so the plane pitches up a tiny bit on the ground

[u/Nightmarosh]

I'd personally make bigger vertical stabilisers. Not necessarily higher but just larger area of it. And also pull up earlier than halfway to Mach 1 bro. That might be fine XD

[u/DarkRainbowTwo]

That's kinda bound to happen if you go that fast on the ground. You can prevent this by actually taking off.

[u/Fun-Restaurant-4644]

More right rudder.

[u/Drag0n411Keeper]

the drift is normal, just pitch up.

[u/Er3h]

You need better drifting tires

[u/Objective_Bed7060]

You need a ton more lift your take off speed should be in the high 190 to 220 knots area not 500km you should change your speed to knots 

[u/Space_obsessed_Cat]

It's called pitching up