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The RUDDER, February 1938

The Small Power Houseboat:
Shallow Draft, Comfort and Low Power Make This Type Desirable
by J.A. Emmett

 

 
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The waterborne Volkwagen:

 

 

 

The Small Power Houseboat

NO ONE wants a craft as seedy-looking as a typical river shanty-boat, nor can many of us afford anything as palatial as a custom-designed shoal-draft river cruiser. Still, in between these extremes are many models of houseboats shoal draft enough to navigate our shallow rivers, inlets, and bays, roomy and with more real living conveniences aboard than the average cruiser, and, when powered with an outboard motor, mobile enough to at least satisfy the urge most of us feel to see what lies beyond the next point of land.

To look well, behave properly and last satisfactorily thought must be given to the design of a houseboat. Effort should be made to guard against excessive top hamper, not because of any effect on stability but that the completed boat will not appear boxlike; likewise, final trim and painting should further the effect of length. Weights and their distribution must be considered because these wide shallow hulls are easily thrown out of trim. And, all important, the hull especially, must be put together properly and with some knowledge of the stresses and strains thrown on such beamy structures by grounding, swells, and hauling out. All this is in direct contrast to the building of the usual houseboat which "just grows" and too often looks it.

In considering the size of the boat to be built remember houseboats run large for their length. For instance, a thirty-foot long boat with a waterline length of say twenty-two feet and a beam of twelve feet could be laid out to give a full-width seven-foot long main cabin, a six-foot double stateroom and a large toilet room and galley in addition to wide decks fore and aft. By laying the cabin flooring atop the bottom frames full headroom can be secured without carrying the house unduly high and long ends would add to the effect of length. At the other extreme even the cabin of a small sixteen-foot outboard powered cruising scow might provide berths each side, stove space in one corner and a work table and food stowage in the other. Canvas curtains to roll up each end would afford clear vision as well as make for a cool boat when used on our inland rivers or wherever summer weather is very hot.

In between these limits something around twenty-five feet would have most of the merits of both, being fairly easily moved about, still give good living accommodations for two or four persons.

 

Nothing adds to the appearance of a houseboat more than having the sheer raised at the bow and tucked up a little at the stern. This is not difficult, being done by shaping the top strakes of side planking. Deck planking can then follow this sheer or be run level so the sides form a rail or coaming.

Side guards may be necessary if the house sides come flush with the planking. These are merely slatted runways, eighteen inches or so wide, to enable the crew to get fore and aft without passing through the house. If the house rests on top of the hull the deck beams may be carried out to support these guards but if it sets down In the hull, angles or some arrangement must be used often making the guards weak. One loses a little cabin space by keeping the house in a foot from the sides but the boat looks better and there are no guards to consider in canals and when docking.

Make some effort to blend the house in with the hull. The roof or cabin top camber may be made excessive and rounded into the sides, house corners may be curved pleasingly or sides even slightly streamed out to give the effect of length. Hatches should be fitted in forward and stern decks for bilge ventilation and examination and for stowage. Houseboats are usually used in warmer than average sections of the country and if an effort is not made to air the hull thoroughly it will not last long.

Quarter bitts both fore and aft should be on the heavy side as these boats are notoriously hard to hold on a mooring or anchor. A thirty-foot houseboat requires equal ground tackle to a sixty-foot cruiser, even bearing in mind the fact that the latter will be bringing up often in open waters. The easiest way to fasten bitts is to carry them down to the bottom planking inside the side planking and through bolt to the latter. Roller chocks should be fitted in the rail ahead of the bitts. If you intend using a winch fit quarter bitts too because the large house will be in the way of carrying spring lines aft.

Some designs feature a sunken deck or well forward, often the full size of the deck. This should be kept above the waterline and fitted with scuppers to carry off rain, also the door threshold should be well raised to keep deck water out of the cabin.

 

Awnings or canopies should preferably be of a type which can be taken completely down for winter or made so canvas alone can be taken off for lengthy cruising. Purely houseboat designs are apt to extend the house top fore and aft to form porches; these may be comfortable but they hold wind badly under way and at anchor. Keeping the house well down in the hull adds to the appearance of any houseboat, lowers weights and improves the craft's behaviour both under power and moored. Possible objections are that it makes for a warmer cabin, the hull may lack strength in the way of the house because of the absence of crossbeams, also bilge water may rise above the cabin floor.

Properly locating windows, and if necessary arranging some system of forced ventilation, overcomes the first failing. Older boats used to carry their houses out to the extreme ends; newer designs favor shorter houses and more deck space doing away with the second objection. Finally, bilge water has no place in a houseboat; it rushes to one side and throws the boat badly out of trim. It is not difficult to keep these scow hulls from leaking; their heavy planking either holds caulking well or swells tight while weaving and working can be guarded against by proper construction.

Even in the cabin layout one must keep the principles of good designing in mind. In houseboats heavy weights, such as tanks, stoves, and toilet fixtures are invariably located well outboard towards the sides of the hull, although having narrow decks alongside the house tends to prevent this. In arriving at your layout figure weights to balance one another, also consider the effect of tanks both empty and filled. Aboard smaller boats one-room layouts make for coolness. Berths may be curtained for privacy nights or stateroom partitions formed of wire mesh panels. Curtains lower over these at night to give privacy while during the daytime the air has a full sweep through the cabin.

If you decide to fit your boat out with house furniture buy something suitable, do not make shift with castoffs from home. Maple looks well, is popular and fairly low priced. Built-in fixtures always look more shippy, though. Berths and settees can be built to take stock size mattresses, wardrobes and lockers can be worked into corners, although chests of drawers are more difficult. I would suggest buying the latter, also ice box, medicine cabinet, and desk, then building in about them even covering doors and drawer fronts with the same wood as used for interior trim. Houseboat cabins are shaped to take these pieces, cruiser hulls are not.

So many good insulating materials are available at reasonable prices one should use them in order to have a cooler boat summers and a warmer one in cold weather; this, aside from any matter of inside appearance. By all means plan the layout, figure on a heating arrangement and build your boat with the idea of being aboard a good deal during early spring and late fall. You will always be glad to get afloat early after a long winter and during the fall an easily heated houseboat makes the best possible base for duck shooting and all kinds of hunting, its draft permitting navigating shallow inlets and winding rivers in search of good sport.

A houseboat, as claimed, can be built by a carpenter or one without knowledge of boat building, but if it is, it should be only from a stock or custom design prepared by a competent architect showing the exact method of construction and giving full timber specifications. Far better have such a boat built by a professional and if you cannot afford that have him at least put the hull together and go ahead from there on yourself or have a carpenter complete the decks, house, and interior.

These wide shallow hulls are subject to more wracking strains than a narrower, deeper hull and having no vertical girder for strength are apt to sag at the corners when hauled out for winter or repairs unless properly framed and cross braced, also to leak and generally be a nuisance. Planking is always on the heavy side, at least two inches in large boats, but they should not depend on this alone for strength, as many do, but be knit together with keelsons and diagonals. The bottom may be either cross planked or strakes run fore and aft.

Athwartship planking is more usual but should be backed by keelsons and side keelsons shaped to fit on up the rakes fore and aft. Full length planking must necessarily stop where the bottom rakes up at the bow and stern because it will not take the sharp bends. Ends may then be cross planked or rabbeted pieces fitted to take the ends of bottom and rake planks. Fore and aft Planking also requires bottom frames which should be let into chine pieces for strength. Heavy cross planking is simply fastened to backing chines spiked or bolted to sides. Many simply drift bolt side planks atop one another using wide widths and depending on their thickness to keep the sides in line. It is better to use narrower strakes, not only spiked together but backed with side frames.

The present tendency is towards lighter material but better fastening. Some builders caulk houseboat hulls, others rely on the wood swelling to make all tight, merely laying glue or lead soaked strips of oakum atop overturned side edges before fastening bottom planks. One must know their wood and guard not only against possible leaks but also avoid forcing planks so closely together they will buckle when the wood swells.

 

Decks and cabin top should be of well-seasoned lumber, always canvas covered. Deck beams should be closely spaced, you will likely use 2 x 4 stock, and cambered slightly, say 3/4-inch in their length, to prevent water lodging about the house or deck fixtures. House construction should be of waterproof plywood or composition board, tongue-and-groove or other light weight material with every effort made to have a tight joint where the sides join the deck possibly bringing up deck canvas there under a flashing piece.

There is now absolutely no reason why a houseboat should stay moored in one spot. These heavy hulls cannot be driven fast but an outboard motor will permit moving from place to place, even allow lengthy vacation cruises if you confine yourself to sheltered waters. Small boats shove easily with a five horsepower motor because there is so little of them in the water; larger boats require double this, either one motor or two. A hatch may be cut in the after deck to allow the motor to be clamped to the stern with the latter cut down a bit, if necessary, to give the wheel a better grip on the water. A special bracket may be bought to fasten astern to take the motor or most models can now be bought with extra length shafts, even with larger than ordinary wheels which turn up slower but are more efficient for such use. Steering lines and a control to kill the motor are easily led to the forward deck for navigating. A fair-sized skiff with an outboard will not do, much out on a towline ahead but it will take the boat along at a fair clip if you lash it against bumpers alongside, steering from the skiff or taking steering lines aboard the houseboat. You will need a small boat anyway for side trips and that is one reason for using two small outboards astern instead of a larger one; one can always be used on the small boat whereas it would be too much trouble to shift a larger one. Metal or wooden hoods can be made to lower over the running motor in bad weather also to lock down when leaving the boat.

The cost of a houseboat is pretty much what you make it. A good design, honestly built of first-grade material by a professional will run about the same as a cruiser of equal length, less the engine. For instance a thirty-foot boat may cost up to $1,500 complete. Rather than attempt to reduce this price by using inferior lumber or used stuff build a smaller boat or have only the hull built now and go ahead with the decks and house when able. Good used houseboats are always hard to pick up. Check closely anything considered. Hulls are apt to be rotted, particularly where side planks featheredge out at their ends, also watch where house sides join the hull and decking about hatches and bitts. Wonders can be worked with the appearance of an old boat by fitting false sheer planks or rails to take away the boxlike appearance.

Powered with an outboard motor or used in conjunction with an inboard powered runabout a houseboat has many good features. They fit in nicely with amateur building efforts and do give more room foot for foot than other types. To many who live where the water is plentiful but spread thinly they offer all the advantages of living aboard week-ends and vacations while the outboard motor has removed the old objection of those of us who would rather cruise than lay at moorings.