Space Plane Help

[Quinantine]

I am having trouble with this space plane. At around 20 km it wants to spin out of control but it doesn't look like a flame out.

3 for the Jets and 4 for the rocket.

I do use mechjeb for intake control but it was removed from the file.

Craft File http://www./?sg1y5dsvfnoiiw6

[PolecatEZ]

Those big scoops do nothing but create a lot of strange drag starting at about 12000m and capping out at 26000m or so. Those forward mono fuel tanks could also be the culprit, but unlikely - you could plant them further back just in case. For my money though, I'll bet that it is a spike flameout due to the scoops. Set the mechjeb 2 tolerance to 20% to prevent flameout and you'll see your air runs out around 20,000 or so with that setup.