In addition to being a homebuilder, Ross Farnham runs Racetech Inc., which builds, supports, and distributes SDS (Simple Digital Systems) EFI and EI kits for Experimental aircraft engines. He currently flies an RV-6A powered by a turbo EJ22 Subaru.
Ground effect, or changes in airflow when flying a wingspan distance above the ground, affects longitudinal stability, elevator effectiveness and possibly even your airspeed indicator. By Ed Kolano.