Dragutin Karlo Novak (16 February 1892 in Zagreb – 31 October 1978, Zagreb) was the first person in what is now Croatia to make a heavier-than-air flight by flying a plane constructed by Slavoljub Eduard Penkala, June 22, 1910. Novak flew in an airplane made by constructor Slavoljub Penkala from the military training-field in Črnomerec, Zagreb. Later, during one of Novak's flying achievements, on 20 October 1910, the airplane was damaged, and Penkala gave up on aircraft design.