The Dumlupinar was a Turkish mine laying submarine of 920 tons displacement launched in 1931. The Dumlupinar was powered by M.A.N. diesel engines providing a top speed of 17.5 knots surfaced and electric motors providing a top speed of 9 knots submerged. She carried a complement of 47 and was armed with one 4 inch gun; one machine-gun; four 21 inch... Found on http://www.probertencyclopaedia.com/browse/RD.HTM