“SEA SLUG” Liner Floats on WORM DRIVE
COMBINING speed and comfort with modern streamline design, the “sea slug” liner employs an unusual means of propulsion. Instead of the screw propeller drive used on ocean ships, this craft is driven by a series of worm screw impellers.
These impellers also eliminate the common hull design. The center portion of the ship is hollowed out for the series of four worm screws. The sides of the hull float and with the hollow screws provide buoyancy for the liner. As speed of the ship increases, the hull rises, lowering its resistance in the water.
While the idea of a cross country cruise ship was pretty far fetched, the technology described seems to work. The Rolligon corporation is actually a going concern that makes big vehicles with really big rolligons.
CROSS-COUNTRY CRUISE SHIP
You’ll be riding on air â€” squashy bags of it that roll happily over every obstacle.
By Frank Tinsley
THE crazy, mixed-up amphibious train shown on this page, half bulldozer, half river boat and all Tom Swift, is only an adaptation of a vehicle now being operated experimentally by the Army.
The rolligon wagon rolls slowly but implacably on a number of limp blimpsâ€”sausage-like air bags without much air in them. These saggy bladders are a vast improvement over the wheel when it comes to moving things over sand, muck, rocks and rubble. For several years the boating public has been using low-pressure rollers for moving boats on every type of ground.
The Mysterious Submarine
By F. D. BURKE
THE interesting little toy described in this article will, when placed in water, automatically dive and come to the surface again, repeating this performance, on an average, once a minute over a long period of time. It not only makes a very good toy for a boy but can be used also for advertising purposes. Placed in a glass tank and displayed in a show window, its actions will attract the attention and interest of passers-by, who will stop to wonder how it operates.
COMBINING many features of an automobile, an airplane and a boat, the Island Commuter cruises through the water at 50 miles an hour. The 36-foot aluminum vessel was built by Anthony Sulak to carry him between Seattle and an island 85 miles away. Two airplane propellers drive the craft on water or land. The vessel has four retractable airplane wheels which are used when it is beached. At rest, it draws only 1-1/2 inches and at top speed it planes four or five inches out of the water. The 3200-pound craft costs $24,000.
Spearing Balloons Is New Boat-Race Hazard
Balloon “busting” from careering speedboats is the spectacular sport recently devised by a racing association in California. Before the start of a race, a cable is stretched above the starting line of the course about ten feet above the water. Large toy balloons are suspended from the cable by means of weighted cords that are just long enough to enable the balloons to be touched by a mechanic standing in a speeding boat. As the pilots steer their craft under the balloons at the finish of each lap, the mechanic, armed with a spear and standing in the boat, attempts to puncture a balloon. If he fails, the pilot must circle about until the mechanic finally succeeds in spearing his balloon. Only then can the boat continue on with the next lap.
Well that certainly is an interesting way to cross a harbor. I can’t imagine why the Golden Gate beat out this design. Wouldn’t you feel completely safe driving through a “boat tunnel”?
“Boat Tunnel” for Harbor Crossing
PROPOSED as a substitute for the suggested Golden Gate suspension bridge at San Francisco is an ingenious boat tunnel of unique design which, it is claimed, can be built for one-third the estimated $35,000,000 cost of a suspension bridge. This and other advantages of the design have led authorities to consider seriously the erection of the boat tunnel bridge, which would be the only one of its kind in the world. It was conceived by Cleve F. Shaffer of San Francisco.
HUMAN SUBMARINE Shoots Fish with Arrows
FISH are shot with steel arrows by human submarines who cruise just below the surface of the water, in a novel variation on the sport of underwater fish hunting, which has gained great popularity along the shores of the Mediterranean. Donning goggles, and closing his nostrils with a nose clamp, the underwater hunter places one end of a rubber breathing tube in his mouth, wades into the water, and propels himself just beneath the surface by paddling with the aid of curious webfoot attachments strapped to his ankles.
WHAT’S WRONG With Uncle Sam’s Navy?
A naval officer frankly discloses just how badly American defense has suffered through inadequate building program.
by Lieut. John Edwin Hogg, U.S.N.R.
(Note: The views and opinions expressed herein are those of the author and should not be construed as reflecting the official views or opinions of the Navy Department.)
AS THESE lines are written the American navy is in the worst condition of decrepitude and impotence that has ever marked its history.
Pacifist domination and sheer neglect has left us with a navy so skeletonized and anaemic as to threaten our national security. Among some none-too-friendly neighbor nations armed to the teeth and in a world seething with social, political, and economic unrest, we find ourselves with a run-down battle fleet that is only 65 per cent of the estimated strength necessary for national defense. Moreover, this precariously weakened “first line of national defense” is only 85 per cent manned!
The headline kind of reminds me of this old ad.
“Come with Me on My Jeepmarine”
Submarine holidays are made possible by a peacetime adaptation of the British “torpedo built for two”
By WALTER NUNN O’BONDIE
EVERYBODY seems to be thinking of flying for fun after the war. Many Americans apparently hope to swap their flivvers for helicopters and spend their spare time dangling from the sky, munching hot dogs bought at a convenient blimp filling station. But not for me! My wife and I are going to spend our week ends touring the bottom of the sea on our jeepmarine. We plan to explore caves and grottoes on the ocean floor. We’ll park our tandem underwater motorbike on the barnacled deck of some ancient wreck, and search for doubloons and pieces of eight. When time permits, we’ll ship our jeepmarine to tropic seas and go riding through coral groves, dismounting occasionally to look for pearls. At least, we’ll be sure to return with a handsome bath sponge of our own plucking.