Buckminister Fuller requested that this phrase be placed on his headstone: Call Me Trimtab.What is a trimtab you might ask? On a boat the trimtab is a small but vital part of the rudder mechanism. On an airplane the trimtab is an adjustable tab on the trailing edge of the elevator control surface that the pilot sets to keep the aircraft steady and level. Lose your tiny trimtab and you lose your ability to control the direction of your vessel. The trimtab, though small, can move a big ship.