Where you voice your views... and the editors do the listening
Where do you put the oil? What does a do-it-yourselfer do with the used crankcase motor oil when it has been removed from the vehicle? In the interest of controlling pollution and in not upsetting our ecology, I’m curious as to what POPULAR SCIENCE recommends for this practice.
A clinic on cars by America's most famous mechanic
Each month in POPULAR SCIENCE Smokey Yunick answers questions on cars—family cars, high-performance jobs, hot rods, and racing cars— selected from those sent in by readers. Got a problem? Send it to: "Say, Smokey—” Popular Science, 355 Lexington Ave., New York, N.Y. 10017.
Can gardening be fun? Yes, if you use the new labor-saving tools on backbreaking jobs
E. F. LINDSLEY
Ten to one, by midsummer your lawn will have power-mower scruff— a look of cut but unkempt raggedness. Like most of us, you probably mow one gear too fast. You don’t have time to creep, back, and cramp to get in tight, so you leave a scraggly margin of unsightly rank growth around trees, foundations, curbs, and posts.
“By 1976, eighty percent of original-equipment tires in America will be of radial construction,” predicts Firestone’s Andrew Rodger Jr. Firestone has just added several new radiais to its product line: Mini-Sport Radial for small imports, Steel Belt Radial for compacts, and the Radial V-1 for full-size cars.
News, comment, and opinion from the world of home— entertainment electronics
The plot thickens
A really different videotape player
On the four-channel scene—
On the record—by Ken Furie
Review by Arthur Fisher
C. P. GILMORE
Sony’s U-Matic version of cassette TV [PS, Apr. ’70] is now on the market. Cartrivision [Look & Listen, Apr. ’72] goes on sale this month. Several Japanese firms are working on home TV recorder/playback machines, and there are a number of playback-only systems that have been demonstrated or announced [Look & Listen, Dec., Nov., ’71, Mar. ’72].
We call them sports cars, but their space, versatility, and finish qualify them as family cars, too
How PS tests cars—and what the tests show
JAN P. NORBYE
One look tells you they’re sports cars. Or perhaps you prefer to call them GT ( Grand Touring) coupes. Both labels fit perfectly. The three cars set new records in our braking and handling tests, accelerated right along with some of the biggest American V8s you can buy, and surprised us with their gasoline mileage.
The following patents have been issued on these inventions: Water saver— No. 3,543,294 to Carl F. Boester, Arlington, Va.; Swimming-pool jets— No. 3,534,413 to Prosper P.Y.R. Plasseraud, St-Cloud, France; Tape applicator—No. 3,537,942 to George J. Kefalos, Barberton, Ohio; Underwater boat scrubber—No.
The fastest way to find a hot wire in a maze of others is to touch it. A safer—if slower—way is to use a volt meter or an indicator lamp. Now there’s a third tool, faster than a meter and less painful than a finger. It’s called Tic Tracer and that’s exactly what it does—ticks as it traces an AC electrical field.
Early last March, an official of the Long Island State Park Commission in New York dipped into 1,520 applicant numbers and started drawing for 165 available campsites at Hither Hills park. About 1,100 applicants wound up with permits to use sites during July and August.
Five animal species that seemed on the verge of extinction not too long ago have made dramatic comebacks and may be out of danger, according to Dr. Carl L. Hubbs, a marine biologist with the Scripps Institution of Oceanography. The animals, which include some of the most fascinating mammals on Earth, are the gray whale, sea otter, northern elephant seal, and two species of fur seal.
Chrysler will make sure that none of its ’73 cars produces over 84 db of noise at wide-open throttle. To meet the goal, the company has changed intake and exhaust systems. The cars will be quieter inside, too. Better seals along the beltline will cut much of the noise entering through window joints.
The Experimental Safety Vehicle shown on our cover this month was first displayed to the public at the New York Automobile Show this spring. When our cover artist, Ted Lodigensky, was painting our cover illustration it had not yet been unveiled, so the only impression we had was from photographs and engineering drawings.
The New ESVs: Race to Build the World's Safest Car
Spurred by federal contracts for Experimental Safety Vehicles, the auto industry and two non-automotive companies are developing cars to let you walk away from "fatal" crashes
JAN P. NORBYE
Take a brand new $250,000 automobile. Load it with dummy passengers. Then drive it into a wall at 50 mph. The same with a second car. A few more—11 in all—ram into the wall so there’s nothing left but a tangle of very high-priced metal and plastic—and one thing more: a basis for the know-how that will let you walk away from a “fatal” crash.
Felix Wankel's Zisch-boat can carry four persons at 60 mph with ocean-going capability
A boat you can almost drive like a car on water? Sounds fantastic. Yet this boat exists, and has been tested successfully as a scale model. Two full-size boats are now under construction, and testing will start this month. The inventor is Dr. Felix Wankel, the same man who built the rotary engine bearing his name.
Kodak's New Pocket Instamatics -and a system to go with them
Can't be bothered carrying a camera? Now there's a camera that's no bother
EVERETT H. ORTNER
With 50 million cameras around the world shooting Kodak or Kodaklicensed Instamatic cartridges, you’d think those folks at Rochester, N.Y., would be satisfied. Not so. A few people, somewhere, haven’t been taking pictures. Claim cameras are too big, or too nuisancy to carry.
Two New Electric Tractors— No Fuss, No Noise, No Gas
These Electraks are cheaper and smaller than GE's original "kilowatt" riders
OFF THE DRAWING BOARD AND INTO YOUR YARD:
E. F. LINDSLEY
If you had a “wait and see” feeling about electric tractors when GE introduced its Electraks two years ago, you weren’t alone. Would the batteries stand up? Would the operating time be too short? Happily, the tractors have performed as advertised.
If you’re a concerned consumer on riding-mower safety, you’ll like the new Bolens 728. Its long development went from an experimental wheeled test-bed ( only slightly less ugly than the Lunar Rover) into what now appears to be one of the safest, most functional riders on the market.
Fail-Safe Tire Lets You Drive at Speed After Blowout
Incredible but true: go 50 mph for a hundred miles— safely—on a flat tire
Ever try cornering hard at 50 mph with a flat outside front tire? I did, and accelerated out of the bend to barrel down the following straight. It was at a race track in southern France near Marseille, where Dunlop recently unveiled its “total mobility tire.” This breakthrough in tire design aims to take all the hazard out of a blowout at speed, to remove the inconvenience of a simple puncture or slow leak, and to let you drive on safely at near-normal speeds for up to 100 miles.
Take your choice: cartridge, cassette, or FM stereo-and in two or four channels
WILLIAM J. HAWKINS
For a lot less than a conventional hifi rig, you can have a music system that will follow you just about anywhere. For your car, camper, or boat, you’ll now find a tremendous variety of sophisticated gear, including: • Cartridge players for regular two-channel cartridges.
Mount a connector on the rear of your deck and solder a 560-ohm resistor across the terminals. Solder a two-conductor cable to the mating plug; run the wire under the hood to an aluminum box containing remaining three resistors and relay.
Do you need them? What kind is best for your towing rig? Can you add them yourself? Here are answers to these vital questions—plus other facts you need to know to bring Tougher laws and bigger recreational vehicles are putting new demands on trailer owners and makers.
A PICTURE ROUNDUP OF NEW PRODUCTS AND DEVELOPMENTS
Tapering smoothly forward like a bullet, Maserati Boomerang by Ital Design is 3 1/2 feet high. A mid-mounted 310-hp V8 pushes it over the road at a whopping 185 mph. The wrap over doors have fixed upper windows, wind-down lower panes. Seats? Two reclining buckets. What else?
Has the golf-ball-in-the-water problem been solved? Trap-It, a cast-aluminum cup with telescoping shaft may do it. Place the cup overthe ball and a sliding pin goes up and down to snag it. A nine-foot Trap-It is $5; a 12-footer, $7. C.l. Industries, 3210 N. Pierce St, Milwaukee 53212.
Dirty headlights? Press a but ton and this German device sprays the lens with water as a wiper swings out from the rim to make two revolutions. Cycle takes eight seconds. From Auto-Technik KG Berlin-Koln, D-5000 Koln 1, Neue Wyer strasse 10, West Germany.
A long, lean handle for easier holding, a longer-lasting motor, and two contoured heads for smooth-cutting-that's what Sunbeam claims for their SM7 shaver, It has a sideburn trimmer and comes in a hard finish travel case. Price: $33.50.
No long cords needed to trigger a second flash unit. When the master flash on your camera fires, Spira Slave sets off the auxiliary. It won't react to ambient light, needs no batteries, attaches with a suction cup. $9.45 from Spiratone, Inc., 135-06 Northern Blvd., Flushing, N.Y.
Parking meters in Paris are taking on a new look. This one delivers a ticket that gives the arrival time and the parking time allowed for the money paid. The ticket is then placed on the windshield for checking by the gendarmes.
Two seconds after a pilot pulls the ejection handles, he's out side under an inflated parachute. Developed by McDonnell Douglas and called ACES, the new rocket-powered system is estimated to be effective at an altitude as low as 200 feet— even if the plane's inverted.
Load in seconds? Fire 250 shots for a dollar? That's the claim of the Rocky Mountain Arms Corp. for their new black-powder breech loader just going into production. To load, you pour a loose powder charge into a fixed-capacity chamber in the rotating turret, push a ball overthe charge, slip a cap-pistol paper cap inside the nipple cover at the other end of the turret, and spin the turret to firing position. The ball can't be loaded from the muzzle-it's too big. A swaging cone shapes it to fit the rifling. Rifle calibers: .22, .36, .44. Rocky Mountain Arms Corp., Box 224, Salt Lake City, Utah 84110.
There's no buckling with this English seat belt. No leaving it off, either. Open the door and the belt automatically lifts clear of the seat. Close the door and the belt wraps around the driver. Secret: a motorized reel. Auto Restraint Systems, 39 Fitzroy Square, London W1P 6AX.
Pushbutton call box
Aid for motorists just seconds away with this new roadside call box from ADT. Four buttons labeled Fire, Police, Ambulance, and Service activate the unit's solid-state FM transmitter. The box operates without batteries; opening the door generates electricity for the radio.
Run one battery cable through this mercury switch, and two things happen in a crash ora roll-over: Juice is cut off to the distributor cable (to prevent fire), and horn and brake lights are activated to warn other motorists. Ferrario, Viale Lombardia 1, 20056 Trezzo Sull'Adda, Milan, Italy.
What floats on Plexiglas runiers and gives off a cool blue light? Glo Bed II, of course. The light comes from two tubes beneath the mattress and foundation. Price is cool, too-$1,200 without mattress. From Simmons Co., 280 Park Ave., New York, N.Y. 10017.
When you need a road in a hurry, Mo-Mat's the answer. Just unroll it and drive. Developed by PPG to keep heavy equipment moving through mud, sand, and snow, the light weight fiberglass laminate is skid resistant. And it can be rerolled for re-use.
portable sauna suit
Those fancy sauna rooms too expensive for you? Now you can get instant heat with the Sauna Suit-a vinyl "sleeping bag" full of warm, dry air. All you do is connect it to an ordinary hair dryer, slip inside, zip up the front, and relax. Warm air then inflates the suit to keep your body toasty warm. The suit has a velcro closure for proper fit at the neck. It's $34.95 from Spacetron, Box 84, Broadview, III. 60153.
When you're done with this can of beer, you crush the can and throw it away or burn it. The 8 1/2-inch-long plastic tube holds 8.8 ounces of suds. A paper sleeve keeps it rigid during pouring and upright on a table. Imperial Chemical Industries makes it in Britain.
Ever try to carry a heavy load up stairs with a hand truck? This German stair dolly ends the bumping and struggling. The device carries three rotating wheels on each side. When you pull the dolly, each wheel uses a successive step. Fred Frieden, 7888 Rheinfelden, Baden, West Germany.
The harder the driver hits the brakes, the faster and brighter the light pulses from an amber Cyberlite in the center rear of this car. The deceleration warning is being tested by San Francisco Yellow Cabs, under permit from the California Highway Patrol.
Now you can put a toadstool in your living room: An accent chair with a polyurethane-foam cushion made by a speedy new cold-cure molding process. Mushrooms range from 12 to 36 inches across, sell for $19 to $40. Table has foam edge. Glomar Ind., 637 Stewart Ave., Garden City, N.Y. 11530.
<bondi:objectDescription>Tapering smoothly forward like a bullet, Maserati Boomerang by Ital Design is 3 1/2 feet high. A mid-mounted 310-hp V8 pushes it over the road at a whopping 185 mph. The wrap over doors have fixed upper windows, wind-down lower panes.
Tough screw to turn? A swingout arm on this rachet screwdriver lets you multiply torque enough to make almost any screw give up. With three interchangeable bits, it's $7.85, plus $1.15 postage. Three Phillips bits add $2.50 to the price. Brookstone Co., Peterborough, N.H. 03458.
No rattles, no loose nuts, if you insert a two-piece Loc-Kit assembly on a bolt. When a bolt elongates with vibration, the washers rotate on inclined planes to take up the gap. When the bolt contracts, the washers turn the other way. Loc-Kits are made by Flushing Enterprises, Flushing, Ohio.
Quarter-degree accuracy in miter joints, repeatable every time, is claimed for this English sawing jig. The work is located and clamped by a square pin, block, and wedge, positioned in holes in the baseboard according to the required angle. Saw guides are faced with nylon springs that hold the blade plumb. The jig can be used for 90-degree butt, double-corner, mortise—and— tenon, dovetail, and other joints. In England, the Jointmaster sells for about $10. It's made by Copydex Ltd., 1 Torquay St., Harrow Rd., London W. 2, England.
Attach an Angle Finder to your level and you've got a dial instrument that gives accurate angular measurements from zero to 90 degrees in any quadrant. It fits over the handhold—no drilling needed. Retail price: $3. Maker is Pro Products, 812 22nd St., Rockford, 111.61108.
Lots of home-handyman problems can be solved with this four-areosol kit: silicone lubricant, penetrating oil, moisture repellent, and belt dressing. All four (three 16— ounce cans, one 15) are $5.80 from L. H. Shingle Co., 1300 Walnut St., Camden, NJ. 08103.
No marking, measuring, or center-punching—the selfcentering Vix-Bit drills the right size hole in the right place to the right depth. Secret: a retractable drill guide. Two sizes: for cabinet hinges ($3.99) and butt hinges ($5). Both, $7.95 from H. L. Japs, 126 7th Ave., Hopkins, Minn.
Only long-nose locking plier on the market, this new Lever— Wrench can get into the tight spots for quick, no-fumble grabbing, with automatic locking. It's $4.99 from Leverage Tools, Inc., Glenvil, Nebr. 68941.
<bondi:objectDescription>Tough screw to turn? A swingout arm on this rachet screwdriver lets you multiply torque enough to make almost any screw give up. With three interchangeable bits, it's <bondi:objectPrice>$7.85</bondi:objectPrice>, plus $1.15 postage.
Get a spare tire out in 10 seconds? That’s the claim for Hugh’s Spare Tire Carrier. It stores under the rear of a pickup for quick access, requires no lifting or going under the truck. $29.95. BMAC Industries, 69 W. Congress St., St. Paul, Minn. 55107.
Put a shock absorber between cab and bed of your pickup for a smoother ride and less vehicle wear, say the makers of Cab Damper. Reason: It absorbs body torque and twist. They’re $25.95 a pair ($35.95 in chrome). Blackstone Mfg. Co., 4630 W. Harrison St., Chicago, III. 60644.
Designed for driver-education programs, the brake-pedal extension at left gives the short guys a break. It’s attached with thumbscrews, fits all cars but subcompacts. There’s one available for the accelerator, too. $2.95 from Bumpa-Tel, Inc., P.O. Box 611, Cape Girardeau, Mo. 63701.
For car buffs who want to neaten their wiring, Zippertubing wraps around the cables and zips closed. No need for disassembly. The tubing can be unzipped again or sealed permanently. $2.95 for a 10foot roll. Zippertubing Co., 494 S. Riverview Dr., Totowa, N.J. 07512.
<bondi:objectDescription>Get a spare tire out in 10 seconds? That’s the claim for Hugh’s Spare Tire Carrier. It stores under the rear of a pickup for quick access, requires no lifting or going under the truck. <bondi:objectPrice>$29.95</bondi:objectPrice>.
Here's a new version of the old classic Franklin wood-burning stove, but this one broils your steak as well as keeps you warm. Franklin fireplace features a three-quart cooking pot and swing-out barbecue grill. It’s $225.95 from Preway, Inc., Wisconsin Rapids, Wis. 54494.
Want privacy plus beauty? New Scotch-Weave woven fencing comes in four-, five-, or six-foot heights, vertical or horizontal weaves. Eight-foot sections come assembled, and there’s a matching lattice “topper." Potlatch Forests, Inc. P.O. Box 3591, San Francisco, Calif. 94119.
You never see that chopping board below until you need it. Made with a “drawer front," the 11/2-inch-thick board rolls out on ball bearings. The cabinet is $116. Long-Bell, P.O. Box 8411, Portland, Ore. 97207.
Aztec’s the name of the interesting molding pattern on the door above. The plastic molding can be pairted to match your door, and it won’t warp, crack, shrink, or swell. Pease Co., Ever/Strait Div., 7100 Dixie Hwy., Fairfield, Conn. 45014.
Those motorized compactors too expensive? Put a Trashpactor Impactor on your garbage can. Just put in the liner, fill 'er up, slip on the lid, and tamp with the plunger. Price without the can: $9.95. AkensAdornetto Industries, Inc., Route 9, West Pike, Zanesville, Ohio 43701.
<bondi:objectDescription>Here's a new version of the old classic Franklin wood-burning stove, but this one broils your steak as well as keeps you warm. Franklin fireplace features a three-quart cooking pot and swing-out barbecue grill.
Listen to music while you do calculations? Right. Crown Radio’s new unit features a battery-operated clock, a seven-transistor AM/FM radio, and a 10-key, eight-digit calculator. It’s $220. Crown Radio Corp., 228 E. Harris Ave., San Francisco, Calif. 94080.
Crown Radio Corp.
Crown Radio Corp.
For the hi-fi buff, here’s an oscilloscope that measures the “heartbeat” of your stereo system. A five-position selector checks voltage measurement, leftand right-channel audio signal, tuner performance, and antenna reception. The Kenwood Audio Lab Scope is $225.
Crown Radio Corp.
This electronic sniffer senses carbon monoxide, butane, propane, and other air contaminates and converts them into an electrical signal. A buzzer alerts you of danger. The Life Guard Selector plugs into any AC outlet, sells for about $40. MRL, 7227 Lee Hwy., Falls Church, Va. 22046.
Crown Radio Corp.
Here’s a neat package: AM/FM radio; cassette recorder with built-in mike, automatic record-level circuit, automatic end-of-tape stop; and a rechargeable battery. The 7%pound Wollensak model 4515 is $100.
Crown Radio Corp.
Want top sound from prerecorded cassettes? This top-performance playback deck has circuitry for cassettes recorded with the Dolby noise-reduction system. Advent’s 202 is $130. Another model has built-in headphone amplifier and jack. Advent Corp., 195 Albany St., Cambridge, Mass. 02134.
<bondi:objectDescription>Listen to music while you do calculations? Right. Crown Radio’s new unit features a battery-operated clock, a seven-transistor AM/FM radio, and a 10-key, eight-digit calculator. It’s <bondi:objectPrice>$220</bondi:objectPrice>.
Square yo-yo? No—it’s a multipurpose floating reel for ski or anchor rope. Made of polyfoam, it’s a boat fender or anchor marker, too. Type I (for 125 feet of 1/4-inch rope): $6.95. Type II (for 3/8-inch rope): $7.95. UERM Marine Products, 5846 East Ave., Livermore, Calif. 94550.
UERM Marine Products
For the backpacker or lone sportsman, here’s an eight-foot canoe. Weighing in at about 20 pounds, the Papoose is made of aircraft aluminum and lined with plastic foam. Price is $185. It’s made by Sportspal, Inc., Emlenton, Pa. 16373.
UERM Marine Products
Safety-glass walk-through windshield, built-in step for easy shoreside boarding, carpeting underfoot, side trays for storage, and full foam flotation —these are some of the features of Fiberform’s new Beachcomber. The 18 ½-foottri-hull weighs 1,510 pounds without engine.
UERM Marine Products
There’s no priming or pumping with this stainless-steel alcohol boat stove—and, says the maker, it lights instantly and won't flare up. Fuel tank holds a quart. Price: $84 from Bass Products, Box 901, Marblehead, Mass. 01945.
UERM Marine Products
It’s like taking your garden patio out on the water. The Islander 16 offers vinyl carpeting, safety and swim rails, and eight by 16 feet of fun boat sitting on two fiberglass pontoons. It’s $1,295 from Holiday, Box 67, Sturgis, Mich. 49091.
UERM Marine Products
When your fishing boat's powered by the Ranger II Remote electric motor, you can keep both hands on the fishing rod. To turn, you press the foot pedal: toe for right, heel for left. It’s $189.50. Electra Pal, 1400 E. Lafayette St., Bloomington, III. 61701.
UERM Marine Products
If chain and padlock won’t foil outboard thieves, maybe the Sher-Lock will. It fits over the turndown handles of the motor mount, locking them inside. A cylinder lock, turning on a bolt in the Sher-Lock’s bottom plate, secures it. It's $8.95. Maker: The Brandon Co., Rte. 1025, St. Paul, Minn. 55110.
<bondi:objectDescription>Square yo-yo? No—it’s a multipurpose floating reel for ski or anchor rope. Made of polyfoam, it’s a boat fender or anchor marker, too. Type I (for 125 feet of 1/4-inch rope): $6.95. Type II (for 3/8-inch rope): <bondi:objectPrice>$7.95</bondi:objectPrice>.
Go camping in your VW and sleep on the roof? You can if you’ve got a Bug House—a four-by-eight foot rooftop deck fitted with a polyurethane-coated nylon tent. Fold the fiberglass deck and it becomes a storage cavity for the tent. Leave it on the roof and you’ve got a luggage rack. The tent has windows that open and close for privacy, and double-zippered openings at each end. An anodized aluminum ladder lets you climb up to the tent once it’s set up. The Bug House weighs 75 pounds and costs $495. From Weslen, Inc., Torrance, Calif.
For bike campers, here’s a backpack on wheels. It’s the Bugger, fine for shopping and golfing, too. A unique torsion control arm assures no-weave tracking and perfect handling, says the maker. It’s $39.95. Cannondale Corp., 35 Pulaski St., Stamford, Conn. 06902.
Ever wish you had a camper that would let you pack the ice chest, fill the water tank, and stop to have lunch—without having to unlatch the top? Wish no longer. A rear panel on Nimrod campers gives access to the kitchen. Nimrod, 500 Ford Blvd., Hamilton, Ohio 45011.
Many a skinned knuckle, tangled line, and broken leader are eliminated by this reel, claims the maker. It works on the planetary-gear principle, but only the knob rotates—on its own axis instead of whirling around the spool. $62.50. Val-Craft, 67 N. Worcester St., Chartley, Mass. 02712.
Lock and alarm are combined in the Howler. If a thief breaks its locking cable, it’ll howl for an hour unless it’s turned off with your key. The ABS-plastic alarm unitwill, it’s claimed, withstand even hammer blows It’s $16.95 from Sunrise House, Blake Bldg., Gilroy, Calif. 95020.
Install this V-shaped guide over your car’s hitch bar and you'll have a perfect line-up of your car and trailer every time for easy coupling. The guard is removed for traveling. Price: $19.95. MFG Co., Box 675, Ashtabula, Ohio 44004.
Lost? Boatmen or hunters can use this simple radio direction finder to find their exact position day or night. The two-band H.E.L.P. Mark 2 R/CDF comes with ferrite antenna, compass, and earphone. $39.95 from Davis Instruments, 857 Thornton St., San Leandro, Calif. 94577.
<bondi:objectDescription>Go camping in your VW and sleep on the roof? You can if you’ve got a Bug House—a four-by-eight foot rooftop deck fitted with a polyurethane-coated nylon tent. Fold the fiberglass deck and it becomes a storage cavity for the tent.
PS takes the guesswork out of dome building with a dome designed, engineered, tested by the best in the business
How to order plans for building the dome
Have you been thinking of building a dome, but waiting for the right design to come along? Wait no longer. We think we’ve got the best design on the market. Our plans? They’re right from Buckminster Fuller—the inventor of the geodesic dome.
Surfboard Conveyor: New Wave in Ground Transportation?
Here's how a stationary track may transport you on waves of air
You step into a ground-conveyor car; the door clicks shut. There’s a faint whoosh of air. Beneath your feet, the floor suddenly rises and your car tilts forward slightly. You’re zipping toward a plane or train departure gate on a wave of air!
Honda's Dual-Purpose Single Quiet on the Street, a Tiger on the Trail
You can ride this machine right out of the showroom, down the road, into the woods
PS West Coast Editor Trail riding’s fun. So is street riding. But how many of us can afford a trail bike and a street machine at the same time? That’s where the latest bike I’ve tested comes inHonda’s XL-250 Motosport. It’s made for both street and trail.
PLATE TECTONICS-A Startling New View of Our Turbulent Earth
Throw away the geology textbooks. The surface of our "stable" planet is in constant motion, with the very continents whirling, tilting, drifting, and plunging beneath our feet
An answer to all the questions
Matching jigsaw-puzzle pieces
How moving plates create geological features
Decades later, a breakthrough
Visible results of trench activity
Plate tectonics glimpses the future
Ever since men began to wonder, they have been asking themselves questions about the world they lived on. How did the mountains that towered above them arise? Why did the ground periodically tremble, often with dreadful results? Why did volcanoes sometimes disgorge a fiery red liquid?
GREAT FOR THE CHASE ...those rugged inshore/offshore fishermen
Now wherever big fish inhabit big waters, you'll find these fishing machines in action
PS Boating Editor T his rugged breed of boat handles both inshore and offshore fishing action amazingly well. It’s designed to go out through the inlets in the morning, beat it offshore to where the fish are, stay on station safely for long hours, and come back in through those inlets at night.
HANG GLIDERS— low and slow, and easy does it, with these far-out, fly-yourself craft
The skies over Southern California and other selected parts of the country have been dotted recently with strange shapes—and we don’t mean flying saucers. They are bat-like and delta-winged, monoplane and biplane, put together with everything from metal conduit to bamboo.
It's easy to build, and lasts a lifetime without maintenance. The secret? Pressure-treated lumber
A. J. HAND
Summer’s here at last. Want to make the most of it? Move your activities outdoors to this A-frame gazebo, a sure-fire family pleaser. To your wife it’s an outdoor entertainment center with room inside for a barbecue grille and picnic table.
This summer, put your patio on the water. It's easier than you think
Step-by-step guide to assembly
Checklist of materials you'll need to build your raft
Want to go for a swim in the middle of the lake? Or invite your friends for a waterborne barbecue? Troll for fish or idly slip along shore enjoying the scenery? Build this 10-by-12-foot pleasure raft. Mine cost me about $400, and went together in about two days, once all the parts were cut and finished.
Three modes make this a triple-threat clock that reads time as you would speak it
WILLIAM J. HAWKINS
Here’s an electronic digital clock that’s not like any other you’ve seen. Normally, the smoky Plexiglas cube is completely dark. Then, at a time that you’ve selected, two digits appear on its face: For example, 09. A second later, two others take their place: 12, say.
Continuing the saga of our full-security house on stilts, we frame the two extensions
Beyond the four main poles: the only supporting walls in the house
How to Order Your Plans
Last month we concentrated on the pole-and-beam cage that supports the basic 16' cube of our Lockbox leisure home. The two wings that jut from this cube are also pole-supported, but their construction is of more conventional platform type: The kitchen walls, for example, bear the weight of the bathroom and an extension of the main roof.
Part II: How to add the deck and all the fittings, make and install your own mast and boom, and prepare your Pumpkin Seed for her first sail
Rules for proposed Pumpkin Seed class
How to order building plans and templates
<p moved="true">JACK PAYNE</p> <p moved="true">TOM McCONAGHIE</p> Pumpkin Seed’s hull is shaped by a novel boat-building technique. Thin wood strips are laid up, one by one, around and over the hull frames.
Here’s a quick way to make your pool filter mobile—a portable cart. You can store it in your garage or yard shed during the winter and won’t have to worry about having it damaged or stolen. Any filter weighing less than 100 pounds can be easily mounted on an inexpensive rubbish-can cart.
Keep running costs down by keeping performance up with these sure-fire checks
There’s a real tiger for troubleshooting and maintaining the ignition system of your car—and you can own it for $20 or less. It’s a volt-ohm-milliammeter—VOM for short. With a VOM you can make go/nogo checks of primary wiring (nontransistorized ignitions only), coil, distributor points, spark cables, ignition switch, ground circuit, distributor cap, rotor, built-in primary resistance, and more.
Saturday-night thieves will have a tough time foiling this one. Defensive Instruments, Inc., borrowed Sylvania’s Magicube camera flash and ended up with Flashguard—an ingenious, low-cost, burglar-alarm system. There’s no need to install extensive wiring as with other alarm systems; four D-cell batteries power an alarm bell.
Operate summer air conditioner like winter heating
Your lawn as an air conditioner
How to take care of your chain-saw chains
Revised Sakrete project booklet now available
How to install an in-ground lawn sprinkler
ROBERT P. STEVENSON
Sears makes a direct appeal to do-it-yourselfers in its ’72 autoparts catalog. A statement on the cover says: “If you’ve been hesitating about installing auto parts yourself, this catalog might change your mind.” Instructions inside include checking plugs, points, rotor, and gap, using a dwell tachometer, and checking timing.
The $75 price tag on a trio of stack tables I saw in a furniture store sent me home with a resolve to make my own set. As it turned out, I saved $65, and I ended up with sturdier tables than those in the store. The tops are plastic-laminate sink cutouts (a local cabinet shop will often sell you these at low cost).
Want to really get back to nature? Build this private lookout in the treetops
J. C. SPANGLER Sr.
Ask any successful wildlife photographer the secret of getting good pictures. He’ll tell you it’s getting close to your subject. One of the best techniques I’ve found for getting close to birds and other animals is to work from a tree perch.