MOTORS AND MOTORING.

New Zealand Herald, Volume XLIV, Issue 13453, 1 June 1907, Page 8

MOTORS AND MOTORING.

A double-acting two-cycle motor has t „> w been invented ami made in America. This engine has » separated mixing cv tinder and piston for positive delivery of "(ho form! charge always, this being effected by the ma ton valve between the pump ami tflfl ix>v«„cylinders. Being a two-stroke motor, wit;, its simplicity and absence of complication! it can be made, especially if double -acting extremely light, for. the h.p. obtained, whilst the turning effect is exactly that of a 6 tear» engine. These manufacturers have got ov.-r a vexed question in the system of cooiini; double-acting motors. The motor abo starts on gasolene, and runs on ordinary kerosene, and the regularity of running is » feature, of the motor. The (rouble exoes-i----diced in double-acting motors has been "a. good packing for the piston rod stopping boxes, but. this has been got over in th fl above-mentioned motor, and also in (. ro large double-acting Jersey City standard motors. The cooling of the pistons, which on account of (ho double number of explosives, get extremely hot, has been effected by a tube in tho crosshead by tho centre piston rod, with a return flow" outside tho tube. By a system of mechanism in tho large-powered double-acting dersey City standards, certain valves can be "locked, open and closed, so that tho engine can b« converted into a single-acting one if desired Also, the two units of three cylinders each can bo unelutehed, so that the after three cylinders can be operated alone and single acting, which reduces power, and also consumption, to one-fourth.