CREATE TABLE table_63883 ("Driver" CLOB, "Navigator" CLOB, "Vehicle" CLOB, "Class" CLOB, "Capacity" FLOAT, "Total Time" CLOB, "Margin" CLOB)

Which capacity has the class 4c3h?
SELECT "Capacity" FROM table_63883 WHERE "Class" = '4c3h'
SELECT "Capacity" FROM "table_63883" WHERE "Class" = '4c3h'