Quickly made in about 10 minutes for a joking bridge challenge attempt.
You MUST stage once to be able to use the kraken drive. It works by using hydraulics to force a decoupled shaft with wheels into a pusher plate attached to the plane.Throttle controls the hydraulic extension, use it very carefully. Too much can summon the kraken and break your everything. Also make sure you use SAS, and be very on top of the controls, if it tilts too much in either direction it can become unrecoverable.