Bike is a Free Spirit FS3, 3-Speed internally geared. Not sure of the year as it does not have a Sturmey-Archer hub.
Lately I noticed that when pedaling it feels as though the left crank is hitting the kickstand but it certainly isn't, I tied the kickstand up to the frame to be sure. It only does it when pedaling slow, or I can't feel it when pedaling faster. It's hard to describe, it feels like it's 'slipping' and it seems to be felt more in the left pedal.
Kind of new to the bicycle world here; I've got a Giant Boulder mountain bike, two Huffy Camaros (1968), one 'mens' colored green, one 'womens' colored purple and white, a red Free Spirit FS3, an old blue Huffy, unsure of year, and an old blue Schwinn, also year unknown.