Show t PERFECT WIRELESS TELEPHONE IS AMERICAS GREATEST WAR SECRET becket for months american airplanes Airplane sHero here and in europe have been equipped with apparatus by which their movements were directed by voice command hardest tests fall fail to impair its complete efficiency WILLIAM A WILLIS in the new york herald americas Ameri caa biggest war secret the development and perfection of tile wireless telephone Is no longer a secret kight years of work by wizards of 0 science in the ho united states aminy aided by civilian workers lit in radio problems camo to buccey saul consummation last F february ebrun ry since that hint time american airplanes here and in europe been equipped vi ith apparatus which lina has made vocal between them while hying us as well as communication with tho earth carth it simple ju matter litter the secret lins has been well kept for many months outside of members of tile the air service few have known it those few davd maintained absolute absolu to dolence balence dl bi lence tile war department ims has regarded tile solution Bol ullon of tile problem of what now Is called voice command flying ns no one of the greatest and most important of the ago age its value in war was so BO tremendous that extraordinary precautions taken to prevent the slightest inkling of the alio development reached from leaking out germans germana had only a hint german aviators know knew that tho american flying nian m n had some advanced method of coin communication tion but did not know exil exactly etly what it was tito french and hying flying forces have dabbled with the wireless telephone in connection with airplanes for mome line tile british meeting with nomo suc cems it remained however for men of the ho american air service to perfect the radiophone alila T ills they have done tito writer la Is the first civilian out elde aldo of newton 1 I linker secretary of war mr john 1 I itean director of aircraft production and ono one or two other highly lilg lily placed government III claim to observe this latest of great american inventions tried out it was on oil receipt of wort from myneola bli neola that the tinniest hardest tests the alio now new wireless i telephone hurt had ever been gumto tn bad failed to impair its complete em clency i taint ar htyan lit in washington washing of made the first news ever given out i of the now new discovery these tests were mado tit nt huist tind roosevelt fields triena alln colit coin under the personal direction of gen Wil willinia linin L reilly chief ot of the division of who canio over from for the ho purpose of finding out if there was tiny font feat lo lit aviation that could brenk down alio lie voice colm coin inand system of when lie quit after tilt nn afternoon of calr bulsing stunts midi every kind of front from the slow planes to elioso swift sv aft eagles or of tile io till clr the do flu lie expressed linsell lin ng completely satisfied that tiia ware least tele telephone ns as part ot of airplane 41 illin neilt lins has como come to stay nud nil li Is tit ILI to meet tally iny situation short ot of nn an actual sina no need for fop further secrecy se ecy the endwig of the lie war has anade further secrecy in connection with this invention in ill lie opinion of air lynn htyan and general kenly thoro there are certain secrets lit in connection with tile apparatus used that will riot not bo be revealed but tile principles involved were made clear without reserve by col clarence 0 culver of the aviation corps tit alio mon mail who mho has led tile tho work of perfecting the wireless telephone liono und and wha Is IB credited by scientists with the major chrt art of tho the cre credit allt for its success those who havo have seen airplanes in n baffle ninny many thousands or oc feet in the air have perhaps pel imps won dorcI how nt at it given moment they have nil turned or looped or lived dived as ono mono tun inn chine maintaining tile tho precision ra blost of west collit condeta clidel on oil drum parade tito tho answer Is that each wall hai a telephone receiver foste fastened ried in III ills hel through which lie he hith re i calved the alie order of file lie squad squadron roll corn coin 0 aiji tinder ns as clearly land end audibly na as it if ho was till nn on tile tho ground M being rig addressed by ills his company cap call inari tile roar of thil motor and tilt whir of tile propellers have no ito whatever on ills his power of clear mission aslon or on oil tile ability of lila ills to receive ills words the tremendous value of the lien colonel culver and those associate with jilin bilm have brought to 1 perfection Is riot not easily understandable by civilians but through its operations of erat ions it Is now flow possible to sund send students into tile the air alone and direct their dally drill drift from the ground thus eliminating the necessity of endangering dan It gering ingerling experienced pilots who us its instructors have hitherto been obliged A to go up tit in tile alio air with their pupils it also la ill now possible to train aviators in advanced lying flying the instructor on oil the lie ground being able to see tile work of film student tind instantly correct ills faults in training and directing pilot gunners and bombing pilots tile the wireless telephone also Is of inestimable value the tests of the new invention were conducted in tile presence of general kenly colonel culver col mallord I 1 V ilarion II armon jr commander of the first provisional wing maj ittia ralph cousins commander of roosevelt field george 0 norton it n lawyer and tho the writer blout hudson it scoring took tile tho air in a do haviland nt at hazelhurst lold field fit at nil an order kenly looks like ordinary transmitter colonel culver took what looked to ile bo till in ordinary telephone transmitter in III his fits hand tills this transmitter was connected by a wire with a small wireless plant built on oil the held field lieutenant scoring had i ik receiver in ills helmet but no transmitter so lie had been instructed to indicate yes by a slight forward tip of ills his machine and no by waving ills piano from aldo to side bide much tho the smile samo as a boat rocking lit in tho the water when scoring was 2600 feet in the air and perhaps half a amilo allo from roin where the party was sin standing tidIng colonel C cuvar i biver speaking king later the transmitter I 1 in n i n tone tome only slightly above normal wild liala cun can you hear TOO me scoring instantly the machine took a forward dip do you hear me clearly asked colonel culver the tha machine lebine wi took another forward lip dip are arc you yola cold was the next question tito tho machine instantly began rocking from side to side well climb a bit hl higher glier ordered colonel culver without a second of delay lint scoring started up Tl inta high enough said colonel C culver liver tito ma machino eliano flattened out then followed it bewildering series of stunts 0 O knelt lit in response to a vocal order from froat the ground the lyer flyer doing nothing on oil its ills own initiative during lieutenant See heerings rings flight ile be ranged from 2600 2500 feet to feet altitude at no time was lie more inore than han three miles from khero general renly and colonel culver stood neither ills nItI tudo nor ills his distance front from the transmitter however affect pd ill lila ills nilley nill ty to hear wha whatever tover was sold said to him from froin field general kon ken ly took its ills party to roosevelt held field where the performance given was wag so remarkable that it throw threw into the tit shade the test mado made with ll 11 lieutenant euten tint scoring astonishing as that seemed irl ift tho the time nineteen battle planes the swiftest of tho lie do equipped with liberty motors took the lie air at once bivy wore were commanded ed hy fly I 1 maj josaph III 13 kaisell Ko Ito isell issell acting ns jig squadron eighteen of tile pilots were equipped with ing apparatus major kossell alone lint had a transmitter equipment this air illet shot on off into tile south at it a speed of miles nn lilt hour but soon oon returned in III it V formation fonn atlon major sell flying higher lil glier and well behind ills his squadron passing over roosevelt field tile miti squadron adron weri went through bertil forming right ines and left lines illies breaking off ui III ilider ant tit directions and nd swinging back into 1 I 1 file evereti Eve everything ing wha wan dune done with perfect prec lilon colonel calier explained that major it hossell oss ell wits giving every everi order by w word ord of mouth th und find that lint eve every ry anoll in 11 ohp fleet was ans getting orders nt fit tile exact instant 1 now if you yell wont to you can stand hot lipto 0 o on oil the ground find he halt nr A major give these orders and nn on can nt at the munie time that youji them see thein carried out sntos I 1 colonel culver lie ho led us ii to a i 4 from the roof rio of which dwarf ed cd put receivers over our aurra ears and ami a woffie nt later I 1 heard eky daig ouia voice say ity ily tile right flank L lien there was it beconi of lie hesitation sita tiou followed by a stentorian stentor lun long drawn out go ond and away oft off in the esaw the long line hue of dinall dots on to tit alir right lind for tile mo moment blent out of sight might ali aud those wordis wor escame ds gaine came from shinken in ai ione gnp feet in tile the air and fully live miles from froin ibero I 1 was otan ling and I 1 was informed would have beon been just tile the same q it lie ho lind laid been further away however wever tile range of the new Is one of ilio iho secrets tt creta that the division of military aeronautics Is sot wt revealing just now ft for more titan than nn an hour I 1 heard hear major put ills hla squadron through a drill and nt at the theT same auie time that I 1 heird ills ijas orders itean irsa v thern them executed these things took place whilo irl llo U 1040 10 19 airplanes were rushing along nt at allore than a i bunah d in ellei nil mi hour nt at nn lilt altitude ran ang froin to feet and I giving tho the order fully two 1 miles lacs from tile nearest of its his inen the apparatus used fo na wireless tel eplion ang Is so SIMPI e 0 4 so coin coal pact that one would never notice either tile transmitting devices le vices on nn nil airplane unless ills its attention was called to it mith tile consent of 0 culver gave me n great information about these do 1 c I 1 the following facts anre the afi r 4 0 le bout about iv lint perhaps Is tao i lit invention antion of tile war ivar description of devit th the e transi transmitting nitting set consists of 0 d power plant a set box a transmitter or microphone and an antenna system tito the power plant consists of A generator driven on tile tho windmill principle by tile passage of tile airplane through tile nir air it Is placed some w here in III the open usually on the running gear or on ono lie of the wings ivings and tta its tiny propeller blade whirls vigorously as tile airplane travels along tito the so bo culled called set get box receives the power front from the ho generator con converts veits it ind and it on the aerials in the form feral of 0 sustained or Waves waves tito voice entering tile the transmitter varies the electric current on the wires which tire are connected as aa in tho ordinary telephone in the set box pu aie variations received from tit jhc transmitter tire ore converted and act to effect it modulation of tile continuous or waves already referred io tito tho antenna system consists bi of an aerial of oho or two trailing wires efres of approximately 10 feet in length strung out lit front from the wing tips till lit Is counterpoised counter poised by tho the wires bild othor other metallic parts of the airplanes till all bonded together these two elements or oc tile the ant antenna entla system are abato analogous 9 one to largo large overhead wires and to the ground or of a land wireless station tito the receiving set consists of 1 t receiving set box it head re receiver cLIver a source of power und and nn all fin antenna tenna system the Is the lie saire its as tile the ant entin system in taio transmitting set tito source of power Is a oneall storage battery tito tho licad head receiver to Is built into the avla aviator torp hel helmet lilet in such buell na as to exclude sounds from tile tho motor reaching tile the pilots car and interfering with ills hearing tile set box proper contains apparatus quite similar to tho the receiving ain ratus of a first 0 les wireless station ilow how ever it possesses a num number or of r allne ellne inesti over elege which increase it ali I 1 14 audibility of incoming signals I 1 withstand vibration and minimize weight |