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Progress, Volume VI, Issue 12, 2 October 1911, Page 833

Our German Correspondent Engineer 1. Selmeeweiss, of Chennitz (Saxony), has just succeeded in constructing a neAV type of airship motor presenting many advantages from a technical and practical standpoint. The "Wodan" motor is made of an extra tough aluminium composition of low specific gravity. The form of the crankease is such that it can be mounted in six divers ways. The six motors may be fastened to round Mannesmann pipes, flat U irons, angular or T irons, or joists. There are two types -working with 4, 0 and 8 cylinders. The 4 and 6-cylinder motors have the cylinders beside each other; the S-cylinder motors are arranged in the shape of a V. The six different models are. as follows: — Number of Cylinders 4 G 8 -I 6 S Bore ..". ... 135 125 125 100 160 IGO Stroke 130 130 130 ISO ISO 180 Capacity per H.P. ... 55/60 SO/85 110/120 100 150 200 Eovolutions per min. 1200 1200 1200 <JOO 900 UOO Weight in hundredweights 2 3 4 ,1 6 16 The gearing is enclosed in a case that can easily be removed. The crank shafts have live journals of the very best kind,

the (i-cylinder motors have seven main hearings. The crank-shafts are of good dimensions, hollow-bored and provided with oil-canals. There are ball bearings for taking up the axial pressure. Each of the main bearings has also one or two oil troughs. Particular attention has been given to the cylinders, so that they may meet all requirements. The walls are of almost the same thickness, varying only 4 to 5 millimetres, so that there is an even expansion and arming on all parts. The material used is a fine-grained castiron,

the only kind that warrants long life. The running cylinder is furnished with a number of longitudinal and transverse ribs which makes it more solid. The ribs lie in the water-tank and aid in cooling the cylinder walls. The water mantle is a seamless drawn copper tube, caulked with two steel rings. The exhaustion canals are arranged in the hot-Avater tank, thus helping in preliminarily warming the

gases entering. The blow-off canals are very short, so that very little heat can reach the cooling water. Each of the cylinders is fastened by six steel bows, which make it impossible for them to get loose. The valves are in complete sets and may be exchanged. The ignition is the most perfect on the market to-day: the Bosch igniter. The carburetter has automatic air regulation. Special care has been given to the distribution and fore-warming of the gas, the method adopted being patented in Germany and abroad. The central lubrication is with fresh oil, no oil-pump being used. Every drop of oil can be regulated and controlled, which is impossible when a pump is employed. The water pumps are a special construction and are driven positively. Engineer Hchnceweiss supplied the two 200 h.p. 8-cylinder motors for the airship of the Veeh Airship Constructing Co., of Munich, which is one of the strongest and fastest dirigibles in the world. He also delivered a second set of two 150 h.p. 6-cylinder motors. In addition, he builds aeroplane motors of 55, 85, 110, 350, and 300 h.p.. with 4. 6, and 8 cylinders. These have been installed in large ; flyers in Germany and abroad.