Outboard Powered Runabouts, Launches  


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Sea Fury-A 15 Ft 3-Pt Hydro Runabout (Pub. No. 5301)

by William D. Jackson, Naval Architect

Now, for the first time, you can build a sleek sports runabout, using a threepoint racing-type hull similar to those that have captured championship trophies in hydro-class competition year after year. With ordinary 35-40 hp motors, "Sea Fury" will begin to plane in her own length and becomes practically air-borne at speeds of 45-50 mph. This, along with the full-length hard chines to dig in on turns, make "Sea Fury" an exciting boat to handle and a money saving project for the back-yard boat builder

12 pages, 3 plate(s)

Sportster--A Speedy 12.5-Ft. Outboard Runabout (Pub. No. 5306)

Here is an outboard runabout especially adapted to plywood fabrication. Construction is simplified and easy, while building costs are low. The completed boat is fast, light in weight, safe and sturdy, giving its best performance with outboard motors from ten to thirty horsepower. Sportster may be built with a single open cockpit or with two cockpits as indicated. If high speed is not an objective, air cooled inboard motors may be used.

10 pages, 1 plate(s)

Mackerel--A 16-Foot Family Type Outboard Runabout (Pub. No. 7050)

Designed by Charles G. MacGregor

LOA 15 ft. 8 in., BEAM 4 ft. 3 in., DEPTH 1 ft. 11 in.

This is a design of a popular type of small family runabout, using any one of the small outboard motors from about 6 hp, up to 10 hp. This little craft will carry as many as eight passengers, and if not overloaded will attain speeds up to 15    m.p.h., depending on the power used. By making slight alterations to the hull-structure a small air-cooled inboard motor can be used. Waterproof plywood is used throughout where possible and feasible. Panels can be obtained -in 16' lengths without a splice or butt, and this is recommended. However, if these panels are not readily available in your locality, do not hesitate to use shorter lengths and make a butt.

2 page(s)

Perky--A Fast and Handsome 12-Footer (Pub. No. 5327)

by Henry Clark

Fast and handsome, this 12-footer proves the adage that good things come in small packages.

Luxury and looks on a low budget. That's the current commercial cry, and it applies perfectly to Perky. For a modest cost, the builder of this boat launches 12 ft. of style, utility and zip. Why 12 ft.? Well, we thought the 14 ft. Chipmunk was just right, but spacewise this 12-ft. hull is almost the same for much less effort and materials, along with the following advantages: Low cost of building; low cost 10 to 18 hp motor able to haul a skier slalom; uses smallest trailer built; easy into and out of water; a snap to drive, to beach, to dock, to store and maintain. Carries a family of five, with safe freeboard, wide beam, and soft ride. Long sweeping fins are not fins, but side panels, forming a built-in spray rail all around. Solid stock harpin eases forming the rounded bow, affording wide deck and smashes down the largest cruiser waves you can ram into. Simple plywood transom is edged with solid stock front and back, and braced with unique corner knees, another Clark gimmick to eliminate the chunky floor knee. Corner knees double as storage trays. Frame "ribs" are all straight stock, another Clark trick to ease building and still get an exacting bottom curvature for a soft ride. Ribs are easily assembled over the full size paper layouts. Stem is oak, shaped with plane, joined to forefoot with bolts. Forefoot lies right on keelson top. No notching. The gunnel, or sheer line is straight, making for a flat jig setup. Sheer line parallels keel.

8 pages, 4 plate(s)

Septa--A 12-Footer (Pub. No. 5331)

by Robert and George Schleier

This interesting 12-footer has a novel convertible top and foredeck anchor hatch.

Septa, the seventh boat built by this father-and-son team, is a 12-footer, with a 54-inch beam, having a foredeck with a hatch, a cross deck amidships and a novel convertible top. With an 18hp outboard motor she does a good 22 mph which is sufficient speed for skiing, not to mention getting to your favorite fishing grounds in a hurry. When the going is rough, her vee forward section cushions the impact, taking large waves without pounding. The flaring bow tends to make her a dry boat. She has simple, clean lines and her seaworthiness was proved to us during hurricane "Donna" when we found it necessary to buck the elements in her to get out and check the mooring lines on our 25-footer. The teeners like her because of her neat appearance, speed and her roominess which provides plenty of storage space for such gear as the necessary boat equipment, skis, scuba equipment, and, of course, there must be the radio and the refreshments. Three can comfortably seat themselves in the fore cockpit and have adequate protection from the elements or enjoy the cool shade under the convertible top.

14 pages, 4 plate(s)

Victory--A 12-14-16-Ft. Runabout (Pub. No. 5357)

By changing frame positions, you can easily lengthen this outboard runabout.

All requirements for an outboard runabout are met in the Victory sport runabout. Due to a proven method of bottom design, the hull is fast, stable, handles well at all speeds with different sized motors, and has trim and attractive lines. Built of waterproof marine plywood, the construction is simplified and produces a lightweight, strong hull suitable for many uses. To meet every possible requirement of readers, the hull is designed so that it can be built in 12, 14 or 16 ft lengths by making a few simple changes in these plans. This boat is a good project for winter work.

12 pages, 2 plate(s)

Cobra--Fin-Tailed 15-Ft Runabout (Pub. No. 5361)

by William D. Jackson, NA

A Fin-Tailed 15-foot Outboard Runabout

Used with any outboard motor from 10 hp to 50 hp, Cobra will achieve speeds of from 20mph to 45 mph and will leave most kit or professionally-built boats well In its wake. At wide-open throttle, this craft rides on top of the water with a minimum of disturbance and, because of its bevelled chines and trim tabs, ft can make abrupt turns safely and without waste-effort spray.

12 pages, 5 plate(s)

Apple Sauce--A Fast Little Speedster (Pub. No. 5380)

by F.T. Irgens

A clever design and building instructions for an inexpensive little outboard boat which anyone can build

Speed and continually more speed is the demand of the outboard motor enthusiast these days. Designers have been producing new types and styles of little boats intended particularly for outboard motor propulsion in large numbers. The design presented herewith represents the result of much experimental work, and is a most succssful little boat for its purpose. When equipped with any of the modern 4 h. p. outboard engines, it will easily do 20 m.p.h., and is also able and seaworthy considering its type and size. The idea underlying the preparation of this design is to permit the outboard motor enthusiasts to construct an inexpensive and speedy craft. With this thought in mind, the designer has arranged his materials so as to eliminate difficult carpenter work, and permit the boat to be constructed with simple and ordinary tools. The addition of the dummy keel gives the boat the appearance of a Vee bottom craft, and also gives it exceptional maneuvering ability. This keel has not the disadvantages of the flimsier metal fin. By carrying the Vee bottom all the way to the transom, all of the bottom sections of the ribs are identical, and the boat will bank nicely when rounding a turn.

5 pages, 4 plate(s)

Flyer--A 10-Ft. Midget Runabout (Pub. No. 5381)

by Willard S. Crandall. Design by Bruce N. Crandall.

The Flyer Midget runabout is a unique design that shouid fill a long standing need. It is only ten feet long; and the bottom design and weight balance of this little boat is such that it will actually plane with outboard motors so small they are hardly ever considered in relation to speed. The many small motors in the five-to-ten horsepower range can be used successfully on this boat. Because of the hydroplane design a very maximum of speed is obtained from these motors, often much more than their owners thought them capable of. A sixteen horsepower motor is the largest size recommended. Like all Flyer designs, simplicity of construction is stressed. The stem, for example, is the simple racing boat style. The total weight runs about one hundred and twenty-five pounds. The roadster cockpit is built to accommodate two persons. Here is a chance to get some revs out of a fishing motor. The ease of construction, low building cost and speed possibilities of the boat make it a wonderful addition to the family of any boatman who has a small outboard motor.

9 pages, 3 plate(s)

Black Arrow--A 13-Ft. Outboard Racing Runabout (Pub. No. 5384)

by Bruce N. Crandall

Because of the constantly increasing popularity of outboard runabout racing and the adaptability of waterproof marine plywood to this type of hull, many requests have been received for a new racing runabout which ccculd be easily built with this material. This new boat is a development from the Flyer Racing Runabout which set many runabout class records since the first appearance of its design. Except for the narrowing of the running surface by the addition of the lap in the bottom the underbody of this new boat is essentially the same as that of the Flyer Racing Runabout. The boat may be built with or without the lap, as desired. So as to simplify planking with waterproof plywood, the sides, bevelled chines, and forward part of the bottom have been redesigned. The use of this plywood planking results in increased strength, easier construction, and a smoother bottom, and also allows the boat to be built without difficulty as light as 200 pounds for class C racing. The principal measurements are as follows: length over all, 13 feet 2 inches; water line beam, 491/4 inches, and height of sides amidships, 141/2 inches.

8 pages, 2 plate(s)

Flyer Racing Runabout--An Outboard Design (Pub. No. 5385)

by Willard Crandall. Design by Bruce N. Crandall

Recent summer seasons saw outboard runabout racing, which has long been popular on the Pacific Coast, gain a foothold over the entire country. The Flyer Racing Runabout has been designed for the stiffest competition, numerous experiments and long experience with West Coast runabout racing contributing toward the finished design. While simplicity of construction is stressed in this design, speed is in no way sacrificed. This racing runabout is the result of years’ experience in designing, racing and actual manufacture of racing boats on the Pacific Coast. It turns sharply, handles well in rough water and has plenty of speed. Bevelled chines make the craft non-tripping, yet the beam is sufficient to keep it riding high at full speed. The overall length is 13 feet and 1/2 inch, and the beam 48 inches. The boat can be raced in the four runabout classes—class F, class E for service motors, and class C for racing motors and for service motors.

8 pages, 2 plate(s)

Toto--An Outboard Motored Runabout (Pub. No. 5387)

Designed by Chester A. Nedwidek

A complete design and building instructions for a substantial little boat of an increasingly popular type which can be easily built

An easily built runabout of a type which is becoming more popular every day, is shown in the present design. Intended particularly for use with any of the larger sizes of outboard engines, it will make an ideal boat for use around a camp, or for general utility service wherever a handy boat is necessary. While Toto is not of the real high speed type of outboard motor boat, such as is generally used for racing alone, it will still be sufficiently lively to suit most people. As can be seen from the drawings, it has been arranged with two separate cockpits or wells, the forward one of which serves as a passenger cockpit, being equipped with seats to accommodate four persons, two on each seat, while the after cockpit is reserved for the use of the operator or helmsman, where he will be alone and undisturbed, so that his entire attention can be centered on the operation of the boat.

4 pages, 3 plate(s)

Speedo--A Novel Outboard Boat (Pub. No. 5413)

Designed by Harold Tapken, N.A.

A sixteen foot outboard engined runabout with the engine mounted amidships.

What do you think, of putting the motor in the thiddle of the boat and the driver further back toward the stern, so that the boat might trim on an even keel when at rest? The engine, of course an outboard motor of the usual form, must be placed in a well, so that it can be removed at need, if anything happens to the propeller or a shear pin breaks. Now this well would have to be rather large, say 11/2 feet in length and about one foot wide. The water would rush into it, as soon as the boat started, and the faster the boat went, the more the water would shoot into the well, causing great resistance. So one would have to fit a lid to the bottom of the well in order to make it watertight and prevent the water from rushing in. This now presents some great difficulties, for the underwater parts of an outboard motor are rather awkwardly shaped and the lid would have to fit perfectly tight, while on the other hand it should be easily removable. The more we thought about the details, the more complicated everything seemed to get, so that we soon began to look about for another way of fitting the motor, or at least another form of well, if one could not do without this. Well, what about fitting a step? Even if the motor were not very powerful, its power would just be sufficient to push the boat along at planing speed, so that a step would not add to the resistance in any way. As the water tears off at the step a good part of the boat's bottom is clear of water as soon as a certains peed is attained. If, now, the well is placed at this point, no water could possible run into it, as soon as the boat is under way. The top half of the motor was turned around so that the carbureter pointed backwards towards the driver, who only had to stretch out his hand to make any necessary adjustment. It was a great idea to lead the exhaust gases through a flexible pipe into the step, where they could expand readily, as there would not only be no back pressure to overcome, but where they would be drawn away by the vacuum, which occurs just behind the step. In order to give the exhaust a free passage, the muffler was removed, with the hope that enough silence would be obtained by the gases expanding under the bottom of the boat, metal fins being fitted to prevent the sound from taking the shortest way out. In this way we hoped to get rid of the back pressure, as well as the noise, and the arrangement proved to be a success in every way. Instead of the clumsy motor hanging at the transom, it was neatly tucked away and visible only from behind. The boat therefore had the appearance of a real motor boat with inboard engine, but had the advantage, that the motor took up hardly any space inside the hull, the entire bow portion of the boat being left for useful purposes, even being spacious enough to permit an afternoon’s nap.     A second virtue of the boat is that it always trims well, at rest, at slow speed, and high. This fact makes the boat easy to handle and very seaworthy.

16 pages, 5 plate(s)

12' 6" Outbard Runabout (Pub. No. 5449)

by Edson I. Schock

This runabout was designed for a general utility, fishing, or family boat. Her carrying capacity is large, and she is steady. Around a camp she is particularly useful, serving as a towboat, grocery truck, marine hayride, or what-have-you. She is not quite as easy to build as the type used for sailing, since the bottom planking has a sharp bend at the bow. This type of bottom, however, is better for a power boat. The bend does not require that the plywood be sprung or steamed, as the bottom is a true developable surface. You should not have any real trouble building her.

4 pages, 3 plate(s)

Build the Scottish Schooner (Pub. No. 5460)

by Hal Kelly

The Scots—knowledgeable as they are in the methods of thrift (stretching a penny as far as it will stretch) —have a way of taking an ordinary substance, disguising it cleverly, giving it a fancy name and getting unexpected mileage out of it. Witness Scotch Woodcock, which turns out not to be related to pheasant under glass at all, but is scrambled eggs and fish paste on toast. Thus we have the Scottish Schooner. It’s actually a 15½-ft. runabout, but it is so successfully designed to get the maximum use out of limited space and so economical to operate, it might as well be a schooner. The little craft is also almost 5½ ft. wide and 31½ in. deep. No wonder its payload is rated at six adults plus storage. It’s fine for offshore fishing and will troll for hours for mere pennies. Or you can just put-put around in it. For a power plant you’ll want a small air-cooled engine. A 4-hp Clinton, picked up at a close-out for $55, was used on the original Scottish Schooner. The craft will take a mill that pumps out 40 horses—with no problem—but then it wouldn’t be Scottish. If you use an air-cooled engine of less than 10 hp you’ll have ample power and you won’t need to register the boat.

7 pages, 3 plate(s)

Buzzer II--a Fourteen-foot Outboard Speedster (Pub. No. 5499)

by Ernest A. Johnson, N.A.

Here is a worthy successor to the famous “Buzzer” that scored a great hit.

“Buzzer II” preserves the best features of her predecessor, but is pointed up all along the line, and her construction has been simplified as well. “Buzzer,” proved so successful that we have decided to give you a boat of the same size and general lines as “Buzzer,” but with certain changes in the construction so that it will be easier to build. Buzzer II will have a top speed of about 35 miles an hour, which will vary somewhat with the size of the motor used.

5 pages, 3 plate(s)

Scud--A Fast 14-Ft. Outboard (Pub. No. 5501)

by A. Mason, Naval Architect

LOA 14' 11/2", BEAM 4' 91/2", WEIGHT 250 LBS, DRAUGHT 2'.

"Scud" will be as much fun to build as to use. Her construction makes maximum use of plywood—which is light, sturdy, and watertight—-yet the hull form is fast and seaworthy. She is as modern looking as any boat in the fleet and suitable for fishing, aquaplaning, or just a fast spin over the water. She was designed to use any outboard motor from 10 to 33 hp. With a 10-hp. motor, she’ll do about 19 m.p.h.; with 22 hp., the speed will go up to 30 m.p.h.; and with 33 hp., she’ll zoom along in the neighborhood of 35 m.p.h. A single, large cockpit is often preferred in a boat generally used for fishing—-it’s slightly more comfortable and much more roomy. If this appeals to you, simply omit the bridge deck.

7 pages, 3 plate(s)

Crack--An Outboard Runabout (Pub. No. 5551)

Crack! Yes-sir, just that—”of superior excellence,” as Mr. Webster puts it. Here is a double cockpit runabout, which, given a suitable motor, will perform in a smother of spray with whip-like speed. Even with the narrow beam of 52 in. which makes this high speed possible,  “Crack” is dry and seaworthy, the generous flare to the forward sections giving the craft great lifting power in a sea while keeping off the spray.  Looking her over, you will notice that “Crack” is an even 16 ft. long, thereby falling into a class of outboards which need not be numbered. There are two cockpits, each comfortably seating two passengers. Complete remote control is possible with a short-type steerer with gas, choke and starter cables to an electricstarting outboard motor. There is a small hatch immediately forward of the motor well which allows of the installation of a reserve gas tank, storage battery, autopulse or other necessary equipment; otherwise, the hatch gives plenty of stowage space for clothing, fishing tackle and the like. The forward part of the boat is accessible from the forward cockpit and affords a convenient place for storing oars, anchors, and such odds and ends as will not be harmed by the small amount of water which, in every boat, collects in the bilge. Each seat also furnishes another dry, clean locker which can be used to good advantage. Never can there be too much locker space.

20 pages, 6 plate(s)

Torpedo--A Fast 131/2 Foot Runabout (Pub. No. 5554)

Fast, safe and comfortable is the “Torpedo”—a distinctive runabout that skims over the water at race-boat speeds and carries four passengers in a capacious hull that will remain leakproof and light in weight during a lifetime of usage.  Marine plywood is used to cover the sides, bottom and deck, and besides dispensing with considerable labor in construction, the use of this material provides a boat that is strong and inexpensive to build and run. If the larger outboard motors from 10 hp. up are used, high speeds with economy of operation will result with lower fuel cost per mile due to the highly efficient planing action of the hull. This runabout, with speeds rivaling any racing hull, is not necessarily confined to such usage. Its commodious accommodations permit it to be used as a day cruising craft afloat, comparable to the auto ashore.

12 pages, 2 plate(s)

Victory--A 12-14-16 Foot Runabout (Pub. No. 5555)

All requirements for an outboard runabout are met in the “Victory” sport runabout. Due to a new method of bottom design, the hull is fast, stable, handles well at all speeds with different sized motors, and has trim and attractive lines. Built of waterproof marine plywood, the construction is simplified and produces a lightweight, strong hull suitable for many uses. To meet every possible requirement of readers, the hull is designed so that it can be built in 12-, 14-, or 16-ft. lengths by making a few simple changes in these plans. This boat is a good project for winter work.

16 pages, 1 plate(s)

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