Page:Model Engineer & Practical Electrician 1501.pdf/28

From Wikisource
Jump to navigation Jump to search
This page needs to be proofread.

162 The Model Engineer and Practical Electrician. February 13, 1930.


American practice. * Sir Morris" had eccentrics, Minny "had Baker gear, and Josie has Walschaerts for the sake of variety Valve travel is nearly 3/16th in.; she cuts off at roughly 70 per cent. in full gear, and can, of course, be notched up like "big sister. " As the boiler is oil-fired, it was made on the water-tube system at the request of the future owner; however, as the grate space is no less than 3 ins. Yong and 2 ins. wide (as big as many 2-in. gauge engines) on account of it being over the four-wheel trailing truck, it would make an ideal type of engine to have a regular coal-fired locomotive-type boiler. The present boiler is 12 ins. long with a 2-in. dia- meter barrel. Feed is by a simple hand pump in the tender, as the boiler holds a good drop of water and only requires feeding at intervals. The burner is a variation of the axle-dodger type described in back notes and in my book, and the fittings and trimmings are practically the same as on 66 Minnehaha." " As soon as track tests are through, Mr. Calvert Holt has promised to take a photo of her for these notes, and if anybody would like to build a replica, will give the necessary sketches and a few hints and tips. She should be more powerful than "Sir Morris, as she carries 25 lbs. higher steam pressure and has a larger and heavier boiler. She should go around a 10-ft. circle if the leading end of the frame is filed to clear the front truck wheels, and the rear truck pivoted forward of the smaller pair of wheels so that the whole issue can swing bodily over like a Bissell truck. The drawbar is attached to the rear end of the trail- ing truck frame and coupled to the leading tender truck, so it doesn't matter a bean how much overhang there is, within reason, as the engine rear bumper-bar and tender sill are entirely free of each other and move quite independently. She is a fairly simple job to build, the only ticklish places in the erecting being the steam and exhaust pipes, as connections have to be made inside the saddle. As this is only a shade over in. wide, there isn't much room to play. about in, as you may guess; and if any brother loco man has a shot at building a copy of " Josie " and gets into difficulties at this point, I guess he'd better buy a box of candy or chocolates and try the effect of " bribery and corruption on those members of his family who have the most delicate fingers. More about young "Josie " later, if all's well. A Shock for the "Abortionists." I saw an incident a little while ago, common enough in America, but which in Great Britain would give forty-odd fits to those poor mis- guided folk who dress up a bundle of wires in the shape of a steam locomotive and think the result magnificent; yet, if a steam loco-fan put a boiler and a pair of cylinders inside an electric locomotive's working costume, lynching would be too good for him, in their estimation. Well, just where the New York, New Haven and Hartford electric tracks join the New York Central, near Mount Vernon, there is a flyover junction, visible from the roadway. The former road uses overhead wires and A.C., and the latter third rail and D.C., the motors on the locomotives and trains being arranged for either 66 system. As the old tin Lizzie hove in sight of the junction, I saw a New Haven train headed by one of the latest type electric locomotives. just approaching the flyover. She eased up as she crossed the bridge and left the overhead wires, dropped her trolley (pantagraph type) and started blowing off; just like friend Irvin's engine would when he shuts off over the fly- over at Finsbury Park on one of the up morning rush-hour trains from High Barnet to Moorgate. Poor old " abortionists wouldn't they just open their eyes wide and think that the order of things had been reversed!! But the explana- tion is very simple. The train was a through express which had been brought to the motive- power change-over point by a steam locomotive, to be hauled thence to New York by an electric. All the trains are steam-heated, and naturally the travelling public don't want to freeze for the sake of keeping the district around New York City free from locomotive smoke and ashes; so all the electric locomotives are fitted with an oil- fired boiler for the purpose of keeping the cars warm. The safety valve is on top of the cab, and does its duty in regulation style. But it sure looks peculiar to see some of the electric locomotives at the change-over, waiting to take their trains into the city, and occasionally popping off as if to show their steam sisters that they, too, can make a noise in the world when occasion arises. Also, it does much to dispel that " dead-as-ditchwater" atmosphere usually inseparable from electric stock. Another one of the "little things that matter!" How to Fit the Averill Cylinders to the Chassis. This is a simple enough job and doesn't require any of the apparatus usually employed on setting-up and lining-up operations. I use just a big toolmaker's cramp and a bit of string or cotton, that's all. The first operation is to set up the driving axleboxes to runaing position, and this can be done by screwing up the nuts holding the axlebox springs so as to get plenty of tension on them, and then jamming a piece of metal the requisite thickness between the bottom of the axlebox and the hornstay or pedestal tie. The pull of the spring will hold it tight enough to stay put. Tip: aways set the axleboxes to running position when fitting side or main rods, valve gear rods or connec- tions, axle feed pumps or any other blobs and gadgets which derive motion from, or work with, the wheels of the locomotive when on the track. Beginners especially take heed, and you'll save bags of trouble and much heart-burning. When at Norbury I had a job sent me from a place eight thousand miles away; the builder had erected it with the axleboxes at the bottom of the slots, and when he put it on the track he said it went all pooey, so therefore fooled around for six weeks or so trying to correct it. As the axleboxes in running position stood a good 3/16th in. off the hornstays, it didn't need a Sherlock Holmes to locate the cause of the pooeyness," and a few hours' work put things in shipshape order. Just before we left England, I had a letter from our worthy brother and he said the engine was doing well. 14 " Next take the two cylinders off the Averill steam-chest, and set the latter in the frames, with the spigots projecting through the big circular holes. Don't spring the frame to enter the spigots or you may give it a permanent