Recent sales developments announced by Dutch engine builder Stork-Werkspoor Diesel b.v. of Amsterdam include three 6-cylinder TM 410 diesels and one 9-cylinder TM 410 ordered by Dutch shipbuilder de Merwede for the dredging company Zanen Verstoep of The Hague. These engines will propel a new cutter dredge, and also drive its sand pumps. Zanen previously used TM 410s to power its cutter dredges Libra and Aquarius. Two 9-cylinder 410s were ordered by IHC-Smit as the main engines for a new hopper dredge due for delivery to Zanen Verstoep next January.
Harlingen, the Dutch shipbuilder, has ordered a 6-cylinder TM 410 engine, with an output of 4,000 bhp at 750 rpm, for Dutch shipowner Kennemerland. This engine will power the biggest deepsea trawler ever built in the Netherlands. The vessel is scheduled for delivery in March 1982.
Stork's latest engine model, the TM 620, has entered service in a number of main propulsion applications. A single V-form, medium-speed TM 620 of only 12 cylinders has an output of 22,000 bhp (16,200 kw).
With fuel consumption such an important factor today, SWD continues to concentrate its research and development efforts in this area. Developments are made constantly on many engine details to reach the best values possible. When first introduced, the TM 620 engine had a fuel rate of 190 grams per kw-hour.
From the beginning, the TM 410 and TM 620 engines were designed and developed to run on heavy fuel. As a consequence, only small adaptations are necessary for the fuels of increasingly inferior quality that are expected to appear on the market in the near future.