The Synchronous Motor will work for that type of prop, I personally have not built one but others here have using linkage for the back and forth motion. I believe there is a current thread on Leering Skellies right now that used them. http://www.halloweenforum.com/halloween-props/141918-leering-skeleton.htmlI know the wiper motors don't reverse but with the 3 linkages I can get the back and forth motion I'm looking for. I want to do a leering skeleton effect and was hoping for ease and piece of mind I could find a rotisserie motor to do it with. I want to put it in an existing space and have limited room for the linkage to work.
Would the motor you linked to have enough torque to do a leering skeleton? I'm relatively new to motors and still feeling my way through all this. I have several vent motors on hand as well I could use. Going to try those tonight to see if they reverse under a load.
Thanks for the comments keep um coming...