Inboard Runabouts 


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Scram--A flashing 15 1/2 ft Runabout (Pub. No. 5032)

"Scram" is a fitting name for a boat that has the flash and sheer brilliancy of performance that this runabout has.  Can “Scram” travel? You get in her comfortable front cockpit alongside the dock, settle into the seat and press the starter button.  The downdraft carburetor shoots a charge of gasoline into the intake manifold, and the engine comes to life like a machine gun. Cast off of lines and thread out into open water as the engine ticks along. With wide water on all sides, you shove in the gun and get ready for a new kind of thrill.

16 pages, 6 plate(s)

Spanker--A Racing Runabout (Pub. No. 5041)

by Gerald Taylor White

Although it’s true that maximum speed with any given horsepower will always come from the hydroplane type of boat, it’s likewise true that interest in V-bottom racing ruriabouts is increasing rather than falling off. There are logical reasons for this. As anyone who has ever ridden in a hydroplane knows, it is uncomfortable and its passenger-carrying ability is strictly limited. The designer of a hydroplane must arrange the weights so the total load is properly apportioned between the planing surfaces. The addition of extra passengers throws the boat out of balance, destroys her speed, and, in many cases, makes her difficult to handle. An additional disadvantage is the fact that the hydroplane can be properly steered only when running at relatively high speeds. If you have to slow down for rough water—or to catch your breath—you find that the boat is sluggish, refuses to handle, and fails to lift over any sea that may be running.  The racing runabout overcomes many of these disadvantages at a cost in speed that many feel is amply justified. While no racing boat can be an ideal rough-weather eraft, racing runabouts can be relatively comfortable and can be used for purposes other than racing. Spanker is an excellent example of what the racing rules have produced in the way of a boat having extreme speed, yet one that is able to stand a moderate amount of rough water and to carry up to four passengers.

16 pages, 3 plate(s)

Broncho, A Hand 29 foot Cruising Runabout (Pub. No. 5052)

Designed by William H. Hand, Jr.

BRONCHO, our latest Hand V-bottom creation, is a distinct novelty in modern boat building. This boat--while not intended for real serious cruising is provided with suitable berths and other essentials, so that should one desire to stay away from his home port for a night he can make himself and a friend or two quite comfortable on board without the necessity of looking up hotel accommodations. Broncho’s power plant has been selected with a view to reliable sustained speed and the motor specified will drive the boat at twenty miles per hour without undue effot. This boat will make one of the best balanced combinations that we know
of. The hull is particularly designed for fast work, and the motor will certainly do all that is expected of it. Anyone who builds a boat from these plans will certainly have a job to be proud of. The arrangement provides berths for two or three people forward under the deck. The motor is carried amidships, also inside the cabin. The gosoline tanks are distributed one each on either side of the motor and the smaller one aft under the stern deck. There is ample room under the cockpit floor for stowing miscellaneous gear and other essentials usually carried on small boats. This boat should make a wonderful outfit for its happy owner. The speed is exceptional and faster than the usual class of small runabouts. The additional features of sleeping accommodations will provide comfort for an occasional short cruise away from hotel life.


This is a husky runabout with exceptional seaworthy qualities and with the specified motor a speed better than twenty miles can be obtained. The large cockpit affords ample room for a party on day trips, and the arrangement forward provides accommodations for two for a weekend trip. For fishing, gunning trips and all round boating it is believed a craft of this type fills the bill.--WM. H. HAND, Jr.

10 pages, 6 plate(s)

Riviera--A 17 ft Inboard Runabout (Pub. No. 5079)

by William D. Jackson

You can do more than just wish that you had a sleek, powerful, mahogany-decked runabout like Riviera. By constructing it yourself you can turn out this eye-appealing 38-mph boat that will be the pride of the lake and a treat to ride in, yet spend only 1/5 the price of even modest boats of the same size and power. You can further fit Riviera to your pocketbook by bargain hunting and using just the amount of trim you wish. Although Riviera is up to date in design and is built to provide years of dependable service, the same construction techniques are used that have proven themselves over and over in home-builder boat projects.

24 pages, 7 plate(s)

Chum--Speedy Inboard Runabout (Pub. No. 5083)

This speedy inboard runabout is designed for a converted Jeep motor

by William D. Jackson

This convex bottom (hydroconic) runabout is 15½ ft. long with a beam of 6 ft. and a maximum draft of 20 in. You can use either a double cockpit or a single cockpit style for utility use. "Chum" was designed for use with a Marined Jeep Engine (such as the Lehman Econ-o-Power, which develops 60-hp at 3400 rpm and will propel "Chum" at over 30 mph). Any 25-100 hp similar engine may also be used to power "Chum", as long as the motor is of light weight, high-speed design.  Plywood of 3/8-in. thickness is used to cover this boat and, with the framework indicated, "Chum" will stand up indefinitely under all conditions of usage.

8 pages, 2 plate(s)

Comet--A fast 16 ft Runabout, The (Pub. No. 5090)

The Comet has been designed to be used with the conventional outboard motor. It really does not matter what power plant you put in this trim little craft as all will work equally well. If you desire a boat to travel at moderate speed, a very inexpensive power plant can be used. If, however, you like to travel at 25 or even 35 miles per hour you will find equipment for the purpose comparatively inexpensive and within the reach of most everyone.  By variations in the deck arrangement, the hull can be made to accord with your probable passenger requirements or ideas of style.

11 pages, 3 plate(s)

Striper--A Shoal-Draft Utility Boat (Pub. No. 5094)

by A. Mason, Naval Architect

LOA 15' 2", BEAM 5' 91/2", DRAUGHT 131/2".

"Striper" is a shoal-draft launch only 15 feet long that not only has all the safety and seaworthiness of a real fishing boat but also has all the beauty and roominess of a handsome utility runabout. It is nearer the ideal solution of the average small-boat owner than almost any other craft, being a boat your family or youngsters will be proud to use and one on which your friends will always be eager to join you in a fishing excursion. -The hull will permit you to get there in a hurry, yet with the small dependable Universal marine engine shown, she can troll all day long at greater economy and reliability than an equally powered outboard engine. Also, the hull form has been designed to be as nonpounding as possible yet allow maximum use of plywood for sturdiness and practically leakproof construction. Furthermore, "Striper" has a tunnel aft that, besides being slightly unusual in a small boat, allows a substantial saving in draft and much added protection to the propeller that will more than offset the slight loss in speed due to the added resistance of the tunnel and skeg. While a small amount of extra work is involved, the construction has been kept simple: all the sides are flat surfaces without any sharp corners to interfere with the maximum efficient flow of water to the propeller. To avoid any air pocket, the tunnel does not project above the water line.

12 pages, 4 plate(s)

15 ft Inboard Motor Boat (Pub. No. 5108)

(60 Miles on a Gallon of Gas)

Setting a new high in economy of operation, this 15-foot boat is designed for fishing and any general use that requires a seaworthy, low-cost, practical inboard motor boat. The remarkable economy in fuel—60 miles to a gallon of gasoline or even more—is made possible through a special design that assures maximum efficiency from the air-cooled marine motors on the market.  Such inherently important factors as seaworthiness and shallow draft have in no way been sacrificed in obtaining this efficiency from the air-cooled marine the fact that an air-cooled motor is not subject to the corrosive action of salt water combine to make the boat ideal for salt-water use. Any desired trolling speed may be had.  The hull is of a simplified V-bottom type, as easy to build as a flat-bottom boat. There is no difficult bending, and most of the planks can be put on in straight pieces with little or no fitting. The small, light motor offers no installation problems. Marine plywood may be used instead of planking, if desired, eliminating the need of battens and substantially reducing the total weight.  The speed obtained with the 3/4-h.p. motor shown in the boat in the photograph was between 6 and 7 rn.p.h. This may be increased to as much as 10 m.p.h. by the use of a 4- or 5-h.p. motor.

16 pages, 2 plate(s)

Doane's 40-Mile Hydrobout (Pub. No. 5120)

Here are the lines, offsets and specifications for the famous Doane Hydrobout--a one-step uitility hydroplane runabout which has been highly developed by Art Doane.

The advent of the outboard hydroplane had both its good and bad consequences. On the good side it taught us that the placing of a step in a boat could and almost always would increase the speed if the boat was of the planing type. We learned where this step should be placed, and a lot of correlative features concerning steps. On the bad side were noted many spills and a gemeral “greased pig” behavior of hulls. Most of these handling difficulties have been attributed to their proper place: That is to the motor and the placement of weights in an outboard hull, but in some quarters the notion got around that the step caused the chine to dig and that step hulls weren’t as easy to handle or as stable as straight bottom planing boats. That notion is a lot of poppycock, fit to be classed with the mistaken notion that Hoover was the cause of the depression. With a properly designed step bottom the handling is no different from an ordinary runabout, and the speed is, of course, generally about ten miles an hour faster for a given power. The reason for this increase in speed is because the water breaks away from the hull, and air is admitted at a point where atmospheric pressure is beginning to turn into a vacuum tending to further load the boat, depress the stern, and slow her up. The step boat, properly designed, just as an airplane or a motor boat should be (with respect to planing areas, weights, etc.), is drier, softer riding, worlds faster, and as sweet handling as the old-fashioned straight bottom stuff.

12 pages, 2 plate(s)

Mary Jane (Pub. No. 5157)

by Robert M. Steward

Measuring 17 feet 7 inches, this round-bottom inboard launch offers the challenge of real boat building, but on a small scale.

"Mary Jane" is a round-bottom launch 17 feet 7 inches overall, with a beam of 5 feet 8 inches and shallow draft of 14 inches. This boat is powered with a small inboard engine. The cost of fuel will be very small and the tank holding a full day’s supply is a permanent part of the boat, but the owner must be content with moderate speeds of up to ten miles an hour depending on the load. Mary Jane was designed for those amateurs who would like to try their hand at a real boat building job on a small scale. It is a matter of opinion, of course, but a round bottom hull of light construction is not much more difficult to build than a hard chine boat. The light frames and planking are easy to handle and the experience gained from her construction will be valuable should a larger boat be attempted in the future.

4 pages, 2 plate(s)

Sea Mate--A Rugged Sea-worthy Skiff (Pub. No. 5185)

by William D. Jackson, Naval Architect

The design for this rugged seaworthy boat was taken from proven sea skiffs used by fishermen for generations. It has been brought up to date so that the backyard boat builder can use newer materials and still retain the durability and seaworthiness of original designs. "Sea Mate" was built with a plywood bottom and lapped plank sides; however, plywood may be used for the sides or board and batten construction may be used for the sides and bottom. This wide choice of building materials will enable you to make a faithful reproduction of this little boat with the materials at hand regardless of what part of the world you live in. It is powered with a Trollabout inboard marine engine. This small air-cooled engine utilizes the same efficient method of propulsion as ocean liners—namely, a 2 to 1 reduction gear that permits the engine to turn at higher efficient speeds while propeller speed is reduced by one-half. Integral gear box has lever controlled setting for forward, neutral and reverse.

16 pages, 3 plate(s)

Sassy--A Rough Water Runabout (Pub. No. 5198)

by Charles M. Ungerbuehler, Yacht Designer

LOA 21' 2", BEAM 7' 21/2", WEIGHT 3275 LBS.

Some runabout owners want their boats to be as fast as possible; others desire their craft to be comfortable in rough going. For this latter class, "Sassy" has been created. Her construction is on the fairly heavy side and her lines have been worked out to produce an easy-running boat. The drawings show a V-8 Mercury marine conversion. Any good marine engine weighing not over 650 lbs. and developing not over 100 hp. could be used.

8 pages, 4 plate(s)

Simple Simon (Pub. No. 5203)

With a 3-hp. air-cooled inboard engine, this attractive 15-foot plywood utility boat will do 10 mph.

LOA 15' 71/4", BEAM 4' 51/4", DRAUGHT 13".

Designed to be seaworthy,"Simple Simon" is almost perfect for fishing and general use wherever the water kicks up a bit. While an outboard motorboat has many obviously attractive characteristics, it is far from its best in rough seas or choppy waters. You see, its stern must be broad to carry the combined weight of the motor and the operator without squatting. And its transom must be kept low--or must be cut down at the center-—so the propeller will operate in solid water. In a following sea, sooner or later a wave will come aboard, drowning the motor and perhaps even swamping the boat. An inboard boat such as "Simple Simon" can operate in a following sea without danger because its transom is higher and narrower than that of an outboard-powered boat and its engine, being located well forward of the stern, is protected. "Simple Simon" seats six in comfort. There’s room under the forward deck for quite a bit of gear. Thanks to her simplified V-bottom construction, her first cost will be low and she’ll be almost as easy to build as a flat-bottom boat. There is no difficult bending to be done. She can be powered with any small aircooled engine. With a 3/4-hp. unit, she’ll do 6 mph; with 11/2-hp., she’ll do 8 mph; and with 3 hp., she’ll do 10 mph. It isn’t advisable to put in much more than 4 hp. as she isn’t designed for speed. The air-cooled engines have three distinct advantages. First, they are simple to install. Second, they have no cooling systems to corrode or rust away. And third, they are economical to operate-—"Simple Simon" will go 64 miles on a gallon of gasoline when run at 6 mph with a 3/4-hp. engine.

12 pages, 4 plate(s)

Scram III--A 15-Ft. 9" Plywood Speedboat (Pub. No. 5218)

We won't attempt to start this article off by telling you how good a design "Scram" is; the boat has spoken for herself. The advent of waterproof plywood has made the double planked bottom and the seam battened sides no longer necessary. This material can take an ungodly beating so it doesn’t need to be as thick as solid wood—thereby saving on hull weight.

8 pages, 3 plate(s)

Imp--A 14-Ft. Utility Inboard (Pub. No. 5228)

by Gerald Taylor White

"Imp" has all the earmarks of a good boat. If she were twice her length, the same hull form would still produce a good boat for all-around use. There’s enough deadrise to avoid pounding in any ordinary sea and enough draft to hang on instead of sliding crabwise every time she gets smacked by a beam or quartering sea. To keep her crew dry, "Imp" has more than the usual amount of freeboard. Her nicely flaring sides forward round into a pleasing tumblehome aft, quite like her larger sisters who swing proudly at anchor off the swanky yacht clubs. Of course, "Imp" is not a cruiser—or is she? The canvas weather cloth forward certainly covers ample space to stow all sorts of camping gear and if the after seat is made removable, there’ll be room enough to spread a couple of inflatable mattresses. A second canvas, buttoned to the forward spray shield and over the sheer molding, will provide as snug a bit of cabin as lots of people would want. Powered by a 5-hp aircooled motor, "Imp" will run just about all day on a buck’s worth of gasoline and oil. The small propeller will keep the draft shallow enough so that you can sneak up picturesque waterways where the bigger boats wouldn’t dare to venture. If you do get snared on a sandbank, simply jump overboard and shove ‘er off.

12 pages, 3 plate(s)

Fontana (Pub. No. 5230)

by S. S. Rabl, Naval Architect

We who live on the sea coasts have been in the habit of thinking that all worthwhile boating is done in arms of the sea. In the past few years, however, thanks to the several Federally sponsored hydroelectrification projects, many inland manmade lakes, connected with thousands of miles of cruising water, have appeared. In the Tennessee Valley, where one of the projects is located, a new generation of boatmen has come into being. I have passed through this region several times and have seen enough of its advantages to want to spend the rest of my life in its quietude. It is possible to take a small boat in there by trailer and it was to this end that "Fontana" was designed and named in honor of one of the beautiful lakes of the region. Many hotels and motor courts are set close to the water, so it is not necessary to spend one’s vacation cramped in a small cuddy cabin. "Fontana" is therefore an open boat with a sedan top. If caught far from tourists’ quarters, she can be converted to an overnighter by rigging her canvas curtains. For berths, lay two inflated beach mattresses on the flooring. For cooking, use a Coleman stove.

12 pages, 6 plate(s)

Whoosh--A Fast Runabout (Pub. No. 5231)

by Charles M. Ungerbuehler, Yacht Designer

If you’ve ever harbored the desire (and who hasn’t?) to own a trim, racy runabout, one that is fairly easy to build and will give years of reliable service and pleasure, then you’ll want to get started on "Whoosh". Performance-wise, this snappy little speedster is everything that her name implies, and is ideally suited for general river and lake use. While "Whoosh" is not primarly intended for rough, deep-water operation, her sea-going qualities have not been sacrificed in the interest of greater speed. The design incorporates a modern constant-section afterbody, which has proved its superiority on countless other craft, and a generous degree of deadrise to keep riding comfort at a maximum consistent with this type. With these design considerations, "Whoosh" will never have to take a back seat to any stock-built runabout of comparable size when the going gets choppy. The arrangement is planned for the utmost in comfort, convenience, and stability. Reached through a hatch, the shelf under the forward deck provides stowage space for anchor, line, and other light gear. A little farther astern is the driver’s seat, which holds two comfortably and has locker space below.

16 pages, 3 plate(s)

Vixen--A 21-Ft. Runabout (Pub. No. 5243)

by George E. Meese

Here’s a craft with an underwater form specially designed to move at almost PT boat speeds, whether the water is smooth or choppy.

Were you ever out boating with some friends when a runabout slipped past causing everyone aboard your boat to remark about its speed? After a few words along that line, one of the supposedly water-wise characters comes up with the sour-grapes remark, “Yeh, but he can only do that on smooth water!” That remark might have been true in the past. However, naval architectural research has developed an underwater form that will give a high smooth-water speed and still allow the boat to be pushed at nearly those same speeds in rough water. "Vixen" was developed from these lines in order to give maximum performance in both smooth and rought water, and still be easy enough to build by the amateur.

16 pages, 5 plate(s)

Electrolysis--Causes and Prevention (Pub. No. 4907 )

A collection of articles on the program bound together in one Hand-Book. From the Table of Contents: Cavitation and Electrolysis of Propellers; The Proper Hook-Up; Galvanic Corrosion--What it is--And how to Fight t; Cause of Marine Corrosion; Electrolysis can be Controlled, Dissimilar Metals in Impure Water Causes Electrolysis; The Control of Electrolysis; The Electromotive Series; More About Electrolysis.

30 pages

Falcon--A trim Strudy 18 ft Inboard (Pub. No. 4909)

by Don B. Pederson

A Trim and Sturdy Inboard Runabout

Incorporating the latest developments in boat construction and eliminating many problems which usually confront the average, novice in boat building, “Falcon” is an all-around utilify runabout which can be transformed easily into a sleek cabin .cruiser if desired. The cost of building the original boat as a runabout was $125 at Newport Beach, Calif. The hull is adapted for use of almost any marine engine from 5 to 20 hp. Total depth .16 in., beam 66 in., draft 42 in., passengers 7 or 8 and speed 17 m.p.h. with a 20 hp. motor. The boat planes at 7 m.p.h.

68 pages

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