I had the field to myself of Friday around noon… a break in our recent heavy rainstorm allowed me to get in a bit of practice. Sue filmed my landings from the ramp next to Runway 19L. Landings went well, and the air was calm. The carpet in the plane got wet in the baggage compartment due to the whopping rain over the last couple days. And during “run up” prior to take-off, the engine dropped 400+ RPM’s with the initial application of carb heat. I taxied out “lean” and did not notice any hesitation in power. However, the conditions may have been pretty ripe for carb ice. I did a much longer pre-takeoff check with high power to bring the engine temp up a bit..and soon the engine resumed normal operation. No indications during the flight of any ice either. A fun practice flight.