How much space does a BullFrog switch machine need? May 10, 2019 19:22 It takes about 2" of vertical clearance to fit a BullFrog switch machine. You can download this drawing from here. Related articles What is a SideWinder? What BullFrog components do I need for each turnout? What is a BullFrog Switch Machine? The BullFrog Switch Machine and Accessories Building Turnouts Using Fast Tracks Assembly Fixtures.