Model Boats

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Vamoose II--A Cruiser for Model Builders (Pub. No. 5411)

by H. B. Pickering

Complete design and instructions from which a smart forty-five-inch gasoline engined cruiser can be built.

The instructions and drawings which follow are entirely complete and no doubt many of these little boats will be built. In building this model the main thought was to keep to the drawings closely and at the same time produce a job which would be strong and substantial, following the same construction methods that would be used on the real boat. The result is a hull of great strength, with a total weight of slightly under five pounds, which permits a 5 to 7 pound allowance for motor, gas tank and equipment. The power used was a single cylinder gasoline motor of 11/8 inch bore by 13/16 inch stroke, air cooled, equipped with a regular carbureter, spark-plug and ignition coil.

16 pages, 4 plate(s)

Submarine in a Bottle, A (Pub. No. 5475)

by Bill North

Sure to stump your friends as to how it was done, this intriguing novelty makes a neverending conversation piece for your mantel.

You needn't be an accomplished modelmaker or a salty old fo’c’sle hand to put a submarine into a bottle. A sub shortcuts much of the labor associated with ship-model building; it’s noticeably short on leech lines, clew cringles, buntline fairleads and other gewgaws that delight the traditional windjammer buff. Nevertheless, it produces a handsome result—in as little as a weekend. Our sub-in-a-bottle is hull-deep in other practical advantages: It is impervious to dust, weather, overzealous admirers and almost any accident short of a fall on a hard floor. And like any ship-in-a-bottle, it poses that question so puzzling to the beholder and satisfying to the builder: “How on earth did you get it into the bottle?” Unlike the more typical bottle boat which is made from the waterline up, this model has a full hull. To give a submerged effect, it stands above the ocean floor on two clear-plastic legs; a green-tinted bottle adds to the illusion.

8 pages, 2 plate(s)

Build this Model Walking-Beam engine (Pub. No. 5481)

by Rudy Kouhoupt

Actual working model requires no castings, features semi-rotary, glandless valve.

As a prime mover, the steam engine came into existence over two centuries ago. From its humble beginnings, James Watt improved upon the operation of the steam engine until he raised it to the position of a great industrial and economic force. One of his innovations, the parallel link motion, functions in this captivating miniature just as Watt specified in his patent of 1784. Briefly, this is how it works: Steam, regulated by the valve, drives the piston up and down in the cylinder in a vertical, straight line. The piston rod, likewise, travels in a straight line but is connected to one end of the beam. This is where the parallel link motion comes in. It is interposed between the piston rod and the beam. There it converts the linear motion of the piston rod into the radial motion necessary for the beam to oscillate, or walk, about its midpoint. At the opposite end of the beam, the connecting rod drops to the crank to impart a rotary motion to the crankshaft. An eccentric mounted on the crankshaft controls the valve so that steam is admitted to and exhausted from the cylinder in the proper sequence of events. The cylinder is double action

11 pages, 1 plate(s)

How to Get "Finish" on Ship Models (Pub. No. 5562)

Reprinted from Ships and Ship Models, February-March 1937

by "Jason".

Finishing, painting, decorating.

8 pages

Ship Model Mast Making (Pub. No. 5563)

Reprinted from Ships and Ship Models, April 1937

by C.N. Millward

11 pages

Ship Model Building in Cardboard (Pub. No. 5564)

Reprinted from Ships and Ship Models, May-July 1937

by Ian MacDougall

20 pages

Ship Modeler's Scrapbook, The (Pub. No. 5567)

Reprinted from Ships and Ship Models, 1935-1937

Tips and Hints for Modelers.

32 pages

Model Yacht Building (Pub. No. 5716)

by Charles Z. Klauder

Of course, it is trite to say that people are various, but is not the proof of that exemplified in the case of the author, who, being strenuously engaged in the profession of architecture, is not content with the designing of buildings and, must seek model yacht building as a recreation? What is to be thought of a person who, despite his absorbing activities, finds lurking in the back of his mind thoughts of the sea, with its many manifestations, and an urge to be part of them, and who satisfies this longing by constructing model boats? On the other hand, it may be that like qualities are inherent in the designing of buildings and boats, for it has been said that architecture has the attributes of firmness, commodity, and delight. Similarly, marine architecture has these same qualities, inasmuch, as boats must be firm, must shelter people, and besides being beautiful, they must be capable of motion, and in most cases swift motion. Just as good architecture expresses pleasantly and artistically the practical and technical requirements of buildings, in like manner one hopes and trusts that beautiful hull and sail plans denote the same for boats. In any case, no one can observe a fine Gardner designed yacht without being conscious of its beauty. Is that not sufficient reason for attempting to create a thing as beautiful? If all this is digressing, it may also be the impelling cause and reason for what follows. Starting from a small beginning, but with a mind trained in presenting intricate forms in graphic, but tight methods, it was not difficult to visualize the surface which would result from the drawings. After the designs, a model was built on the bread and butter form, with the inside as smooth and carefully executed as the outside surface, and the result a fairly good object to look at. As time progressed and vision expanded, it seemed possible to construct a model which could be made to float on a preconceived waterline to conform to racing rules, and to be not only an object fair to look upon, but also an exact replica of the thing which it was made to represent. To attain such a result was only half the intention in the last of the models constructed, for to be perfectly satisfactory to the owner, the boat had to have the ability to sail: The result is a model 36 inches on the load waterline, representing a racing boat of the P-class, at a scale of 1 inch to the foot, made in accord with the designs of the larger boats of which it is a model, and being proportionately of the same length, width, and draught, and made to carry the same proportionate sail-area, but to have its centre of gravity so low that it would sail in competition with other racing models of the same size. It might be well at this place to say why it is necessary to have the centre of gravity lower in the model than it is in the larger boat, which the model represents. Everyone familiar with sailing full-sized craft and models—or, to put it another way, anyone familiar with sailing a large boat as well as a small one— knows that in any given velocity of wind the larger boat has greater stability than the smaller one, everything being equal and proportionate. It is well known that a boat of 75-foot waterline length stands up with as little difficulty in a 30-mile breeze as an 18-foot waterline boat does in a 15-mile breeze.

12 pages

Model Your Own Dream Boat (Pub. No. 5847)

by Weston Farmer

Dreaming of that boat that you hope to build some day? Then you can’t afford to pass this up. It shows you how to make certain that you’ll get the boat you want.

Boat-minded sportsmen usually have a “feel” for sweet curves and flowing lines. But they find it difficult to get these down on paper so that the boatbuilder may interpret what is wanted. Few laymen have the necessary professional skill to draw out a boat, calculate the weight, peg the proper waterline, and predetermine the performance. How, then, to get the boat you want out of dream stuff? How do you know how it will actually look and how it will perform? The method is easy. You model it. Anyone who can handle scissors and a tube of model-airplane cement can get, with the method I show here, a miniature of his boat which will show him how his dream ship is going to look and how it is going to perform.

8 pages, 2 plate(s)

Lathes and Lathe Work for Modelers (Pub. No. 5906)

CONTENTS--The type of lathe to purchase for model making—Setting up the lathe—Elementary lathe work—Wood turning—Grinding tools—KnurlingMetal spinning—Turning crankshafts—Screw cutting—Internal lathe work—Attachments for a model engineer 's lathe—A small lathe made portable by mounting it in a cabinet.

The lathe for model making or light experimental work need not be an expensive one. A complete outfit, comprising a practical lathe with a few tools and attachments for nearly all ordinary jobs, may be purchased for a couple of hundred bucks (check out Harbor Freight for great tool bargains), depending upon the equipment desired with it. Money so invested is well spent, for not only does the home lathe offer opportunities for developing a fascinating and edifying hobby, but it will also provide many a chance to turn an honest penny for its owner. The field to-day for mechanical toys, novelties, and working models is tremendous and the wise home mechanic will make his work lucrative to the extent of paying for his equipment and perhaps giving him a little surplus besides. And, in this connection, let it be said that there is probably no single tool in the entire shop that develops in its owner and user such a sense of affection as the lathe

8 pages

Electro-Plating in Model Work (Pub. No. 5909)

CONTENTS--Explanation of the process—Description of a small plating outfit—Solutions used for the electro-deposition of copper, silver and nickel—Cleansing solutions for various metals—Polishing and finishing work.

The average amateur mechanic seems inclined to regard electro-plating as a very complicated and difficult process, involving the use of costly materials and apparatus. This is not the case, however, as the successful electro-deposition of copper, nickel and silver is a comparatively simple process, the practice of which easily comes within the resources and ability of the amateur. An electro-plating outfit should be included in the equipment of every workshop, and it is the purpose of the author to describe in the following lines the construction and manipulation of a small but practical outfit, which will enable the mechanic to properly plate and finish his machine or instrument parts.

8 pages

A Model Slide-Crank Steam Engine (Pub. No. 5910)

CONTENTS--Description of the engine—Procedure in machining and finishing the
various parts.

This model represents what is probably the acme of simplicity in steam engine construction. It ranks favorably with the old type oscillating cylinder machines in this particular, although it is admittedly superior in point of mechanical efficiency and design. The entire absence of cross head and usual connecting rod, with their attendant difficulties from the builder's standpoint, leaves nothing to be desired.

8 pages

A Model Twin-Cylinder Steam Engine (Pub. No. 5911)

CONTENTS--Description of the type of the engine—Machining the cylinder castings, crankcase, valve chest, crankshaft and valve mechanism—Finishing the engine.

The model described below resembles the Westinghouse high speed stationary steam engines used in driving electric generators for lighting circuits. It is simple in design, serviceable in operation and presents no great difficulties in construction.
This engine, when constructed from a set of magnalite castings, makes a wonderful power plant for a model boat of from three to five feet long, and it delivers considerable speed and power. It will also be found to be a reliable and consistent runner, which is a valuable advantage.

8 pages

A Single-Cylinder Steam Engine (Pub. No. 5912)

CONTENTS--General procedure in machining the engine parts, employing the most
practical methods—Finishing the engine.

This particular design of engine is really the forerunner of the "Speedy" class of engines, having been built before the slide crank engine was designed. The engine has proven its worth on several occasions.

8 pages

Soft and Hard Soldering for the Model Maker (Pub. No. 5913)

CONTENTS--How to make soft solder adhere—Soldering fluxes—Preparation of metallic surfaces to receive solder—Methods of holding work while solder is being applied—Information on silver soldering—Silver soldering outfit—Composition of silver solder—Application of silver solder.

Soldering, both hard and soft, is an important operation with which the model engineer will have to become very familiar. Both processes require extensive practice to become proficient in, but this should not discourage the model maker, as it is quite possible to do good work with a little practice, providing the directions are followed carefully and the necessary precautions to insure success are taken. It may be that the first two or three jobs of silver soldering or brazing will not be entirely successful, but after the model maker has made a few experiments along this line, no difficulty will be experienced in doing good work, which, although it may not be perfect, will serve its purpose.

8 pages

Hardening and Tempering Steel in Model Making (Pub. No. 5914)

CONTENTS--Simple experiments in the tempering of steel—Proper temperature for tempering to various degrees of hardness—Case hardening—Carbonaceous material employed—Proper heating—Notes on case hardening furnaces.

In model building and experimental work it often becomes necessary to harden a piece of steel and temper it to a definite degree of hardness or soften a hard piece such as a spring so it can be drilled or machined and a few simple experiments in heat treatment of steel are sufficient to enable one to obtain the desired results.

8 pages

Pattern Making for Models (Pub. No. 5915)

CONTENTS--General foundry practice—How moulds are made—Various kinds of patterns—Making patterns—Cores and core boxes—Parted patterns and how to make them—Finishing patterns.

Pattern making is an extensive trade, and a man could well spend a lifetime learning its various sides ; the beginner, therefore, should not attempt the building of large or complicated pieces without the help and advice of a practical man, but by keeping constantly in mind the elementary operations in the moulding and drawing of ordinary patterns he should be able to turn out satisfactory work, and not suffer the humiliation of hearing it pronounced faulty by the foundrymen.

8 pages

A Model Twin-Cylinder Marine Engine (Pub. No. 5916)

CONTENTS--Description of the engine and various parts—Lathe and machine work necessary in finishing the engine—Making a built-up crankshaft for the engine.

The beautifully executed model pictured and described in this chapter was built by the famous London model engineering firm of Whitney in City Road. The model is of brass throughout. Possibly for flash boiler steam, and that is admittedly the best for the purpose, it might be well to specify cast iron for the cylinders and pistons. It is said that brass or gunmetal will pit and otherwise cause trouble with very highly superheated steam. Accordingly, it is the prerogative of the builder to decide which material to use. He has but to weigh the ease of construction of brass with the superior operating qualities of cast iron. While this model is not recommended as a project for the dabbler or the rank amateur in mechanics, its construction is delightfully simple for the worker who is possessed of a lathe and who knows how to use it. A screw cutting lathe is not essential as all of the work can be done with a small speed lathe fitted with a slide rest. Of course, the heavier the lathe, within limits, the easier the job and the better the workmanship. However, the advanced model maker who is capable of using his head to overcome difficulties need not hesitate to undertake the construction on even a small bench lathe. The illustrations cover every detail of the engine, the working drawing being supplemented with photographs of the part of the machine ready for assembly. It is assumed that the worker who attempts the construction will be sufficiently familiar with lathe practice to be able to work directly from the drawings without detailed instruction.

8 pages

Flash Steam Plant (Pub. No. 5917)

CONTENTS--How flash steam plants operate—Description of the various parts and fitting employed in a flash plant—Regulation of the water supplyLubrication—Difficulties in adjustment—Gasolene burners for flash steam plants.

Flash steam plants are more adaptable to the propulsion of model steam boats than ordinary "pot" boilers, as they generate steam more rapidly and are therefore able to furnish more power to the engine. Although somewhat more unwieldy to handle than ordinary boilers and somewhat difficult to adjust, they are, nevertheless, preferred for model speed-boat work. All the present records are held by boats propelled with flash steam plants, which alone is enough to indorse their use. The average American model maker is not very familiar with the operation and construction of flash steam plants and this text is devoted to the method of operation and the general features of construction.

8 pages

Flash Steam Plant for Large Model airplanes (Pub. No. 5918)

CONETNTS--A description of the engine and what it is capable of doing—Machine work necessary to finish the engine—A flash steam plant for the engine and how to make it.

In view of the great activity recently evinced in the designing of model power plants for aviation and other purposes, this compact and efficient power plant should prove of considerable interest. Providing as it does a self-contained plant of sufficient power to make it eminently practical and of great utility, the construction of this engine at once supplies the model maker with a most interesting project, and furnishes him with a reliable source of power. While no special effort was made to secure lightness, as the engine was originally designed to propel a canoe, for which purpose it has proven perfectly successful, the power plant is not too heavy for the large airplane model which it would be capable of driving, and would undoubtedly prove an ideal solution to the propulsion problem in connection with such a model. In fact, the author considers that it would vindicate the employment of steam vs. other prime movers in whatever field in which it might be put, and in addition, the construction alone would be of sufficient interest to repay the model maker for his expense and labor. The engine, which will deliver a maximum of about 21/2 H.P., utilizes steam from a flash boiler in four single-acting, radially disposed cylinders. From the standpoint of compactness, there is little doubt that this arrangement is superior to any other, and a great simplification of valve mechanism is also secured. In this case, the distribution of steam to the four stationary cylinders which are, of course, at an angle of 90 degrees to each other, is effected by means of a rotating member flexibly coupled to the crankshaft and revolving in a casing connected with the steam supply and with the cylinder heads. This member carries on its periphery two ports, one, communicating continually with a small chamber under pressure from the boiler, serves to admit steam to the cylinders in succession as it passes the ends of the pipes connected with the cylinders, and is of such length as to cut off the admission of steam to the cylinders after about 20 degrees of the inlet stroke; the other port is in communication with the atmosphere by a series of holes and permits the cylinders to exhaust during about 80 degrees of the stroke. The general appearance of the engine is conveyed by Fig. 118. The four pistons are all connected to a single crankpin by means of a disc rigidly affixed to one connecting rod, and carrying supports for the other three rods on which they may pivot slightly as the crankshaft revolves. One of the most unique features of the engine described below is that no castings are required; all parts being made either of cold rolled steel or brass stock.

8 pages

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