You've tried to build one and discovered it ain't so easy. Now, we are offering for the first time anywhere a finished rotating radar as seen on the Ken MacKenzie tugboat. This includes the curved radar support arm, the brass mast and the motor case and radar arm.
The key to the unit is an ultra miniature motor that rotates at just the right realistic speed.
It is powered by one 1-1/2 volt battery. The battery holder is sold separately. Found below the video.
The radar motor case, supporting arm and mast is made of sturdy cast polymer. The mast cross arms are brass tubing. Add your selection of light fixtures and you'll be ready to navigate.
Dimensions: Total Height: 7-7/8" Total width (including the swing of the radar and the mast outlets): 4-1/8" Depth (at base, thickest part): 1"