Size 16D is
for model airplanes from
ca. 2.800 to 15.000 g weight
shaft diameter from 6,0 mm to 12,0 mm
adjustable upward gradient from 6,0'' (152,4 mm) to ca. 25'' (635 mm)
propeller diameter from16,2'' (412 mm) to 22,6'' (574 mm)