Large ship take-off issues

I’ve run into a weird problem when trying to fly my Carrack and Caterpillar… that being I cannot take off. Before anyone mentions these “solutions”, no its not a speed limiter issue, or a proximity on/off issue or even a power to engines problem… all have been messed and still these ships won’t take off or stay “air borne” on a planet. When entering landing bays with the Caterpillar occasionally I get pulled down the platform (like a steel to a magnet) and bam stuck again.
Thoughts?

Check to make sure you’re in coupled mode. Decoupled mode you’ll drift the last direction you thrusted towards and gravity will pull you down.

You have a speed limiter, assigned by default to left alt + mouse wheel scroll.
You also have a thrust/acceleration limiter that limits the actual nozzle output. Have you checked to see if you assigned them, if so to what and make sure that the thrust output is set appropriately. If the controls are set somewhere and you bumped it down accidentally gravity will take over.

Caterpillar having trouble taking off is nothing new, often have to pull the nose up and afterburn to break free of some planets.