> How does the trim wheel work? Is it mechanically connected to the stabilizer?
On 737s, yes, the trim wheel is mechanically connected by cables. To quote the 737-800 FCOM:
"Manual stabilizer control is accomplished through cables which allow the pilot to position the stabilizer by rotating the stabilizer trim wheels. The stabilizer is held in position by two independent brake systems. Manual rotation of the trim wheels can be used to override autopilot or main electric trim. The effort required to manually rotate the stabilizer trim wheels may be higher under certain flight conditions. Grasping the stabilizer trim wheel will stop stabilizer trim motion."
Ok, so in the worst case you are still able to block the motor that does the automatic trimming with your bare hands. Which seems like a reasonable fall-back. Thanks!
