| Show Care of Tires Becomes Vital With Rationing WASHINGTON D D. Before C.-Before C. C n C.-n Before fore tire lire rationing became an actuality motorists motorists mo mo- and car owners owner in the United States s considered a tire as ns Just another another another an an- other ever n needed Then few motorists motorist gave cave any reasonable amount o of thought to ways and means o of lengthening the life lite of their tires There are arc a good Rood number of motorists mo who are well acquainted with will the story making the rounds concerning con con- a 11 test test car car driver who was asked how he would wear out a new brand set of tires in three days Those motorists more than likely after hearing that story began to to check up on themselves to see I If I they were guilty of such actions sug sug- Bested by the Ule test-driver test in that suc-j suc story stor story sto sto- r ry the idea of which is repe repeated ted here Successful Tire Wear Near The successful ways to wear out tires Ures according to that veteran driver arc are each tire lire about 20 per cent Drive In hilly country where the roads are arc twisty and the grades steep Select a pavement pave ment having a sandpaper top t I Choose hot dry weather Take curves so fast the tires lIres slide and squeal loudly run mostly on the road shoulders Spin the Ule wheels when starting starling open er cr cr up to tu 70 or better when you can and always make screaming sudden stops But Dut today motorists arent aren't out for such an experimental lark They are intelligently doing the following things test car research has proved about tires lires and their proper care They are keeping careful check checkon on the In Inflation atlon of ot their tires For p- p M sEia Y 4 Before and After It n has been found that Increases tread wear causes walls and cords to break brenk down and increases increases in in- creases susceptibility to pinch pinch dam age concentrates wear In the tread center makes males wheels bounce spin and skid and promote bruises and hard riding If a tire lire Is 15 run flat fiat it might be ruined in but buta a few seconds Th Thin 01 they e now realize there is the matter of pinching bruising and overloading Such is often hooked I up with willi improper inflation Pinching Pinch ing usually is caused by striking objects objects objects ob ob- which fold told a tire Ure wall against the rim often breaking or loosening cords Bruising comes from striking strike striking ing stones chuck holes or curbing Overloading inabilities the effect of such thoughtless abuses Good Tires Only Recapped And at tills this point motorists should understand it will be only the Ule good tire that the government through army specialists will permit to be recapped Not just any tire is goIng go go- Ing lag to be recapped For there is a definite time and condition of at the theme life me of a tire beyond which it is uneconomical uneconomical un un- un economical to recap Trying to get wear out of the Ule last few thousand miles puts a tire in the class where recapping for economically suitable use is doubtful Besides the above points which motorists are paying strict attention to to here are some Borne more suggestions as read In Popular Science Monthly J that are helpful in adding miles and perhaps years ean to tires Prevent wheel misalignment which scrubs rubber from tram treads Similar damage comes from Improper Im tin proper wheel front camber and caster cast er bent axles loose bearings wheel wobble unequal brakes and out out out-of- of round drums Likewise proper balance bal ance once of the wheel heel and the shifting of tires with the spare included in ht the shilling shifting further decreases rubber wear And a Few Tew Donth A few tew for motorists interested interested in in- in longer tire life are Dont Don't speed in hot weather Dont Don't let the brakes become Dont Don't wheel spin the car ol oil off to a jumping jumping start start especially especially in gravel end and cin chi How flow w c are arc antiaircraft antl guns uns How flow can cnn they hit a target like II a n speedy elusive plane Isn't It difficult to fire heavy henvy projectiles several miles up Into the llie air against the strong pull of gravity These questions are arc arising Inthe in inthe inthe the minds of many Americans now that coastal cities of the United States lore are preparing ring for air raids and guns arc are being set up to guard I against them Actually British experience In this war has shown that the chief value of ot anti aircraft guns Is not in bringIng bringing bring- bring Ing ng down enemy bombers but in keeping cooping them high and spoiling their aim says a bulletin from the National Na Na- lonal Geographic society If It a bombing plane Is to score a n alit nhit hit lit on its objective on the ground far farbelow below below it must fly lIy in a straight line linein linen In n the direction of ot the target for a D afew few ew minutes to give the bombardier a chance to set his bomb sight ac nc- It is during this period that a bomber is vulnerable to antiaircraft antiaircraft anti anti- aircraft fire for then the pilot cannot cannot can can- not dodge or follow a zigzag course Anti aircraft gunners worry less about bout overcoming the pull pun of ot gravity than han about getting their shells up fast ast enough to explode near or hit their heir rapidly moving target Antiaircraft Antiaircraft Anti Anti- aircraft shells contain a powerful charge harge of ot powder designed primer ly ny to launch the projectile I ton on Us s' upward path with the greatest possible ble Ie speed Bomber Domber pilots have learned in this war var to watch for the flash of antiaircraft antiaircraft antiaircraft anti anti- aircraft guns firing at nt them theta from ders ers Dont Don't speed And once again dont don't let the rubber on your our thes tires get ct too low before beCore having them re re- treaded or recapped For technicians point out that a aire tire ire which is recapped before the rubber is worn wont to too great reat an extent extent ex- ex tent will give clone to the original mileage obtained from a new tire Say these technicians the recapping of a n tire fire by the addition of ot approximately approximately approximately 1 15 pounds of at rubber keeps in service a n tire of about four times that weight according to estimations Finally here Is what an authority has las to say to put the finishing touch ouch on tire conservation The Th kind of driving that is safest for the driver drier his passengers pedestrians and the occupants of other cars is precisely the kind that produces longest life Ufe in ink tires and the car it it- it self sell below according to British officers I who have been Interviewed in this country When they sec see the flash nash they thy know that It will take several seconds for the shell to reach their level and explode In this brief period period pe pe- of grace crace they try to dodge if possible Hence the importance of making shells sheilS travel upward at the Ule greatest possible speed Fighter planes are the best defense de de- de tense against enemy bombers the British have found During the heavy air attacks on England in 1910 British fighters shot down nearly nearly near near- ly 10 times as ns ninny many German bombers bomb bomb- ers as did anti aircraft guns Heavy guns gums of about three Inch bore and ond upwards ore are used against highflying high fly ing bombers Against dive bombers which zoom down close to their targets light rapid fire anti aircraft guns are arc effective ef ef- effective British experience shows I One of ot the most useful is a n 40 milli 40 millimeter milli- milli meter a about bout lay li inch gun sun The best I way to use such a gun is to walt wait until the dive bomber is very close i ito to the ground and the llie range is short and then fire at high speed If It a n dive bomber is fired upon when Itis It Itis itis is still high the pilot can see the location of the guns and has time timeto to pull out of his dive and approach from a new direction Machine sun gun fire also is Js effective against dive bombers If the Ule gunner gunner can restrain his eagerness until the plane is at very close range British British Brit Brit- ish report During the llie evacuation evacuation evac evac- of the British army from Dunkerque Dunkerque Dun Dun- some German dive bombers even were brought down by conc concentrated concentrated con con- c rifle tire fire One incidental use for heavy anti anti- ai craft guns gums is to show friendly fighter planes plants the location of enemy bombers It is often difficult for fliers In the nir air to spot other planes Gunners on the llie ground In England sometimes fire lire a n few bursts of shrapnel shrapnel nel in the direction of an enemy bomber formation to point out its lo location location lo- lo cation to British fighters that are ore in inthe inthe inthe the air nir then leave leav the battle to the airmen Anti aircraft shells are set to explode ex ex- at any desired height before they lire are loaded In the gun The height and other factors that enter into calculation of the Ule range ore are determined determined de de- by secret and highly complicated complicated com com- apparatus When When a shell bursts fragments of shrapnel are sent flying lying in all directions over a considerable area |
