Walt Good0 Battle RC Frequencies frequen cies enjoyed today RC fliers have evolved through ongoing series negotiations tween AMA FCC other terested parties since Forties report chroni cles some interplay Part 2 3 THE RC POPULATION grows19521958 Prior acquisition two license-free RC channels RC Nats held late 1940s averaged about 30 entries used Ham frequencies 50 MHz band required Ham operator li cense 1951 new 465 MHz RC gear available two compa nies Citizen-Ship Babcock Models Nats RC entries evenly split between Ham 50 MHz license-free 465 MHz frequencies new 27255 MHz RC channel au thorized FCC came use March 1952 years Nats fre quency usage distribution stood 50% us ing 50 MHz 30% using 465 MHz 20% flying 27 MHz See Table 1 1954 Nats 50% RC fliers us ing 27 MHz frequency 40% 50 MHz Ham channels 465 MHz usage dropped 10% trend confirmed Babcock sales figures three-year period mid-Fifties showed 27 MHz outpac ing 465 MHz units 10 Actual sales 10000 versus 1000 units Thus appears lower cost 27 MHz units both commercial homebuilt attracted bulk RCers Neverthe less 1950 1955 465 MHz units did provide first license-free system serve RC community As Table 1 clearly shows availability 465 MHz gear 1951 spurred rapid crossover 50 MHz frequency However 1958 less expensive home-built gear 27255 MHz taken strong lead 465 MHz usage receded 1958 Nats 40 Model Aviation FCC Docket 10086 published after three years negotiations between AMA FCC announced first home-built RC frequency established 27255 MHz ef fective March 24 1952 transmitter required crystal-controlled less 5 watts major advance no examination required FCC license FCC 529 Before 7J9D2BAI 0012 IXflCATIC2TS C013413S1011 Washington 05 D C i4atter ox Amendment o Part 19 Commissions Rules Regulatons Governing CitiscnsRadio Service 1CKET NO 10036 0 RD t session Fed-ral Communications Commission held its o&fices Washington N C th 13th February Commission having under consideration above captioned matter erovido use frequency 27255 Mc control objects devices radio Citizens 2adlo Service II rare old photograph depicts Bill left Walt right Good attending demonstration early RC equipment Henry Ford hat hand 1940 Ford Airport near Dearborne Ml Note transmitter powered car battery 400-volt dynemotor 30-watt output 72201 Glenview IL over 75% 280 RC en tries used 27 MHz 20% Ham gear scant percentage still 465 MHz availability license-free RC equip ment stimulated rapid growth RC air plane hobbybut certainly didnt eradicate its problems Interference 27255 MHz1958 As earlier test flights shown re gions country radio interference RC models 27255 MHz wasnt gen erally concern Beginning 1958 ever problem surfaced few specific areas key cause certain met ropolitan areas traffic control transmitters adopted same 27255 MHz frequency acquired RC use 1958 RC Nats Chicago po tential conflict severe enough call halt RC event during afternoon rush hour Chicago traffic signals being switched radio different flow mode ease homebound traffic after workand 200-watt traffic transmitter used same 27255 MHz frequency RC fliers Los Angeles Long land NY traffic systems also utilizing transmitters frequencywith Los Angeles earning epithet King Kong among local RCers AMA complained about inter ference FCC reminded us RC users 27255 MHz frequency must ac cept whatever garbage signals might assigned ISM band fre quency part Although AMA did re member caution scarcely antic ipated 200-watt transmitters city wide coverage would considered ap propriate use ISM band Several modelers shall remain name less known upon occasion ease homeward travel using RC transmitters own switching local traffic signals path Much relief radio-controlled traffic signal systems retired use within few years Some Los Angeles area fliers found switching RC gear other frequency released interference caused King Konga strata gem sometimes led bigger prob lems story goes mod eler flying near Los Angeles Sepul veda Basin another came asked could fly too Saying spe cial channel avoid King Kong air borne flier gave newcomer go-ahead second flier launched planeand crashed almost immediately followed short ly crash plane number As RCers learned too late both using 29 MHz frequency course illegal Sidestepping overloaded King Kong channel backfired case addition traffic control transmit ters other sources interfer ence RC ISM-band users Some radio-dispatched trucksbut fortunately fewwere using 27255 MHz channel time medical area di- channels1956-58 As ranks RCers athermy equipment used 27255 MHz increased did desire fly several frequency during patient treatment models same time same field course flying models well away hospitals solved problem typical 27255 MHz receiver period very broad receiving band al megahertz width receptive almost signal within band Char acteristic simple super-regenerative type circuit prevalent wideband receivers susceptible interference narrow-band types came later contrast crystalcontrolled RC transmitters period emitted very narrow band energy hence did cause problem others time Additional RC channels needed sat isfy goal same time avoid ing interference non-RC inhabi tants overloaded 27255 MHz chn nel AMA appealed FCC help resolve needs Second Battle RC frequencies launched status quo relatively undis turbed however until 1956 young communications attorney named Ed Ansell approached AMA volunteer ser vices free charge Having worked within FCC several years Ansell wanted bolster portfolio experience ad vance position private domain decided strategy forging out June 1989 41 Bill Good tuning receiver 1940 Nats Chicago Because inherent instability equipment era frequent tuning requiredsomething like other flight Second Battle additional RC clipping West Coast Model News dated February 16 1952 announced negotia tiona between AMA FCC finally paid off new RC frequency 27255 MHz POWER DIVE Little Planes Hit Bad Beep WALTER WINGO water tank nearby RUNt Virginia sends out beep 1 sep rad signals inutes Acad entv Model Aeronautics says its reason alarming increase model plane crashes re cently Vlat bothers Academy ilioUt ldnk radiowhich notifies its owners waler levelis variety oilier radios arc device hand same M frequency assigned radio-conrolled model planes Sunday doing lilt te lilglm-allitude flying noctl II uooiivni r~of Wheaton said Dr Wallet A nnd l3cthesda golden hysicist chairman ASIAs radio-controlled 5 visury coiimniss' Washington Daily News February 19 1957 dIscussed Virginia water tank trans mitted beeping signai 15 minutes causing RC model controls maifunction al crashing plane Because both using same FCC-assigned frequency 27255 MHz incidents like occurring alarming regularity spurred AMA continuous negotiations FCC new frequencies less interference own link between FCC ap propriate client such AMA Ansell already cognizant some AMAs needs area Radio Con trol also aware FCC preparing docket Citizens Radio Ser vice low-power walkie-talkies 1956 Ansell began drafting AMA assis tance official petition five new RC channels 27 MHz band petition became part FCC Docket #11994 January23 1957 month later Washington Daily News generated little publicity about RC fliers problem story called Lit tle Planes Hit Bad Beep February 19 1957 news feature related RC plane almost shot down ra dio signal local water tank height water tank being measured electronic device sent radio signal distant office reg ular intervals Obviously calibration de vice assigned same 27255 MHz frequency RC modelers used yet another example electronic applica tions swept heavily saturated ISM band known uncompli mentary jargon day Garbage Band FCC established ground rules RC modelers beginning 27255 MHz frequency never exclusive prerogative no conveni ent scapegoats no extenuating alibis Clear ly though after five years RC use sit uation caught up us problems wtth interference worsened time seek additional RC channels RC fliers determination pointed up telling quote abovementioned Washington Daily News article Curtis Plummer head FCCs Safety Special Radio Services declared AMA bunch getting very vocal ago got about 2000 letters telling flight disasters bemoah ing fact can fly plane time contests fact FCC port form re ply handle deluge protest letters RC modelers modelers took part effort owed belated thank-you Due part support September 11 1958 FCC isstted five new RC channels 27 MHz cam paign worked five 27 MHz RC channels spaced 50 kHz sandwiched among 22 Citi zens Band CB channels low-powered two-way voice comnmnication sets spaced 10 kHz shown Table 2 newly established close frequency spacing required narrow-band receiver ca pable selecting specific RC channel desired rather bringing several RC CB channels once Clearly old wideband super-regenerative receiver dropped crystal-controlled superheterodyne receiver answered new requirements narrow-band receiver neces sary precision allowed capture single desired RC channel re ject rest fortunate parallel develop ment then-new transistor would soon replacing vacuum tube yielding smaller better receiver before acquisition five new RC chan nels freed modelers conduct RC Pylon Sailplane competitions up five models simultaneous flight also opened 42 Model Aviation U Model Airplane News January 1959 carrIed report Doris Ed yuike FCCs grant ing five new RC frequencies 27 MHz band new frequencies awarded September 1958 AMA negotiated FCC four years obtain Finaily possible average modeiers fly several RC planes same time way multiple plane fun-flying local club field As sidelight assigning RC CB us ers chunk 27 MHz band FCC obliged take same portion 11-meter Ham band RC mod elers felt grateful Ham operators latter furious time Six years after assignment first RC channel 27255 MHz Second Battle RC channels time being reached satisfying resolution Strange Invitation FCC 1958 before five new channels 27 MHz band activated late 1958 FCC issued invitation AMA participate formers review frequencies between 27 MHz 900 MHz purpose forecast needs various potential users frequen cies seemed strange indeed consider ing additional future RC channels fore five new channels acti vated underlying reason learned FCC wanted draw up future frequency plans encompassing various user groups information would pre sented US Delegation Ge neva convention discussion other participating countries goal make new worldwide frequency assign ments cooperative basis As wed al ready noted countries adopted RC band 27 MHz several using 465 MHz band well AMA accepted invitation opportunity present overall RC fre quency story FCC Commissioners staff review took place mid-1959 helped set stage future re quests additional RC channels needed retrospect ap pears eyes FCC stature AMA increasing icquisition five new 27 MHz band RC channels September 1958 could have timely both RC club fliers large-scale competitions Just two months before new channels activated 1958 Nats RC event Chicago swamped 215 RC entries single 27255 MHz channel large number partly due branch ing RC event five categories three Pattern contestsRudder Intermedi ate Multiplus Scale Pylon So well represented Pattern events competition stretched out four days qualifying flights two days finals During early phase-in 27 MHz frequencies 50 kHz spacing seemed quite compatible new crystalcontrolled transmitters narrow-band superheterodyne receivers came market 1958 1959 Nearly half receivers 1960 Nats superhetero dyne ones Although home-builts still permitted five new channels es Continued page 44 FEDERAL CONMUNICATIONS COMMISS ION Washington 25 D C August 26 1959 77543 VIOLATIONS CF THE CITIZENS RADIO SERVICE RULES Commission sionitoring stations continuing detect violations Citizens Radio Service Rules issuing large numbers citations licensees volntions cited fajl mainly tuc large groups uency operation ths use Ciiizns Radio Service stations communications vhioh permissible undor Rules FCC Bulletin #77548 dated August 26 1959 stated some CSers using illegal high power non-CS channels citations issued violators Trans iation Some CBers causing probiems high-powered gear new RC channels Jamming Thwarts Model Fliers CY CHARLES REm WASHINOTONTha plan clinthed mt sleep atall faiteced p102nd tailspin arasbod Earth d watched Tragedy Nttonsrely ant brennan wan radinaontrnlled motlol Bun primary ennan saab accident ha snetlel aleplarn fans boiling mad sod deeply invalved tha Pedoral Cotnnooi nations Cotaminsion Tha problem thn radIo freqoenay sipted toe model airplann pilot nbsrad albert different radio obleativot An remIt 0 man panbieg twitch operate Ills note malta garage door cutting hi Iwo-way car radio way interrupt radio beam model plane mod eat control AS PUT BY DR WALl KR Good Botba da Md. o eltokeuman fee lb Aandeosy Model Aeronautic Thia yen renaider amen models urn very complicated have 5foea wieg span coat up 55110 morn h 1- Ucwwnnco*aat ononeoc eta l 1 ]TI ug baa sad An excerpt Chicago Daily News March 27 1965 entitled Jamming Thwarts Model Fliers After six years new frequencies CS population increased millions interference adjacent RC spots become intolerable model fliers Again AMA appealed FCC better channels aptly depicted papers cartoon Five new frequencies 72 MHz band authorized May 1966 mentioned clip ping American Modeler September/October 1966 expected greatly reduce interference problems RC planes new RC gear required have FCC typeacceptance home-built units werent permitted restriction considered seri ous few remaining home-builders commercial units quickly made available June 1989 43 New Spectrum Home RC Modelers JEREMIAH COURTNEY Climaxing years work Academy Model Aeronautics FCC approved five new frequencies will enormously redice eliminate interference As anything new questions answered Heres rundown.. inua wlI 101 uu Ii zuvxi BALSA SHUTS 36 48 1 162 33 3322 40 18 243 316249 14 2 58 1323 37 120337 1 163 374831 33234458 37 18 3 5471 45 3163-628255 143 7385 61 5163 85110 38 3 89124 71 12 3110155 34 3165181 I164 58.7648 3324 709458 16 4 8010668 3164 5312275 4 411013484 3/8 4165225129 2 4225261 MATCHED SHEETS 43 3324100 154108 3164120 144131 3D BALM STICKS 3646 1161409 1163810 1161214 3321410 3323812 3321216 191608 18141116 18381218 19121624 3163161116 316381720 316122230 14141624 14361926 14122130 14343444 1414055 5165162128 38382737 38123246 36344256 3815270 12123653 1 2344662 1215978 5/85/84865 34346790 1~414 w BALM TREANGLES 36 1/41425 3183830 1/211235 34 34 45 155 BALSA PLANKS 36 1195 12150 13200 14 280 1123 215 11124360 22225 23 325 24435 343495 34686 TAPERED SHEETS36 1142 65 143 85 38o268 3183 98 123120 CUSTOM CUT CONTEST BALSA Sheets Piecee Sanded Close Tolerances AAA Grade modeler dShippedlOO% areKiln Drie seriousand want performance must try 4-6 lb balsa LIGHT 4-6 LB WOOD36 1323 53 1203 53 1163 53 332363 1183 77 316388 143104 383122 123158 343242 13335 116483 3324100 164115 3164133 144156 384536 124322 ThAILING WOE 36 141 32 5161 14 39 381 12 46 112270 BASS WOOU 3/16311626 311611430 3/162/838 3/1611246 3163460 114 ,114 42 143849 1463480 3/83/660 31811270 31831490 1121/290 UNDLE DEALS. 20-1 11 84338889 2011l64361025 20-3/32 336865 15332436955 151/8336735 10-116436695 153/16336920 10316436835 10-114336655 101144369i30 10318336870 5-318436655 5-112336540 5-134361080 103/32446885 5-118448500 5-3116446600 5-14448645 - *NEW* Hundreds new sizes accessories and- finishing materials Send #10 SASE latest catalog 5P914ICEdTICKS 36 46 118 118 -1725 118 142026 18 382232 31163116 2838 114 1143450 114 3184955 1/4 1124585 3/8 3/8.4869 3/85 1/26077 112 1126688 1/253/47597 SPRUCE TRIANGLES 36 31831847 112112 - 64 31434 - 81 HA5D MAPLE 1436 31636 318 112 318 34 1234 BIRCH DOWELS 16 316 14 516 39 26 40 45 50 58 69 36 09 11 14 25 32 3PLYBIRCH45 16412620 13212445 1/1612455 1/812496 SPLYBINCH 3/3212 1/8412 3/16 12 1/4t12 3/8 12 1/212 48 5-99 625 626 625 725 900 RAI SA HOT L LONE STAR EPOXY -INSTANTOLUELIrE PL 548OROOVEDLO MOUNTS So L,--8 951 o Thck 296 5, 598los Th, 298 Ieha Call fBeS7454394 lOam bpmCeetrelTImelSr,n5662osThok5581/8561553/834/1/840 LONE30o/5982o Tho5501/812 -3153/83/4 5/33/40 _____________________1/462501/231413/16/45 14612495 STAR MODELS coma HandlIng Charge pay UPS Add $3 00 COD $300 extra PP APO FPO 1623 57th St Lubbock TX 79412 565. 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V euo Clevis Remover Clevis Remover designed especipily sit uations davis located very tight spot within fuselage also removes arms off servos removes servo plug-ins Futaba radio receivers use simply insert Clevis Remover between servo arm end clevis tilt right towards thresd ad part davis tool hand-made engraved purchasers name price includes shipping handling Available direct Reynolds Jewelry 1707 Crter St. Vidalla LA 71373 318-3364606 - Its Stock f Immedt ShIpnsent ZENOAH G4237ca In828495 New Quadra 40 CDI 13-bea4og spring start 917595 Rae Quadra 46 614986 Briaghells flywheel 88 Rag Quadra 40 PswatAsaenbly Only points 96896 OUADRAOZENOAH R6f%IR *18O0iplus parts Jim Mesas ERCOUPE PLANS 92388 FuLL-KIT *32896 Jim Mess TOMAHAWKPLANS 62385 PuILKIT 923989 Jim Meager J-2 KITTENPLAN592996 FULL-KIT *21896 510 KADET SENIOR KIT-68989 isass 62260 810 KADET SENIORITA KIT93889 says 81688i ZENOAH 0-23 86ZENOAH G-38 85 FLOATS 48% 1/4 scale ss2l89 ssmpleta hit 94789 18 WWl WHEELS 8P/K Spring Starter 92496 PLANS SUPER STSARMAN 114 iGodlreyl $2896 1/3 TAYLORCRAIT 1/3 CUE NalIt 62885 MGA Paintad Pilot Busts 1/4 s.WW-I WW-2 CIV *1996 Servos H-482 424491289 World 818 forirge modals 94495 Prom sites ER TOP FLflt DYNATHRUST 28% OFF US Quadra FUELTAI6KSlBoz9796320 9896 FIEERGLASSARROWSHAPrS8/18s23lsog 84sr61195 24 No, Sarsiw 92 SOpostuas Bush Cheshorms JIM MESSERS QUALITY MODEL PRODUCTS VaUeyVIewDr Box 43ANgany NY 14706 tablished RC industry quick market acceptable designs encourage younger pilots minimum age dropped 18 12 years RC CB opera tion early transition 27 MHz fre quency smooth new RC channels worked well little iniding problems would develop sooner ex pected leading much earlier resump tion search different channels experienced almost no interference between adjacent RC channels spaced 50 kHz seeing occa sional glitches ii RC model flight caused interference CR walkie-talkies spaced 10 kHz short order began hear reports GB users illegally shifting crystals less crowded RC chan nels documented case interference caused severe injuries out-of control RC plane crashed spectator California instance CRer located near flying field committed two vi olations shifted CR frequency RC channel added 40-watt amplifier could play disc jockey other CRers Armed information RC club bad attempted several times before accident get CRer off RC chan nel FCC able prosecute CR vIolator - Increasing problems interference 1-960 mounting Citizen Band radio us- age hordes operators air brought ever increasing interference RC fliers CBers -were emulating Ham ra dio operators requisite skills legally licensed amateur radio operators stories heard CRers using illegal high-powered amplifiers large directional beam antennas make long-distance contact foreign countries FCC intended Citizen Radio Service used primarily local nec essary useful brief messagesthe le gal power limit five wattsnot continuous unrestricted entertainment con suming up 5000 watts power CBers indulging mod elers suffering repercussions Some five-watt CR station users dis covering five RC channelsand ille gally shifting crystals quiet oa ses avoid high-wattage peers During period recall watching screen spectrum -analyzer showed CR channels active spikes jump ing up down mainly proper fre quency locations five RC spots should have appeared comparatively like lulls several didnt Instead showed active voice modulation CR chan nels indicating illegal non-RC usage Another group CRers called Part 15 Gang exploited loophole Part 15 FCC Regulationsa rule permitting 100milliwatt transn-sission type section 27 MHz band used RC coterie targeted five RC chaqnels claiming appeared least WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITTI Satisfaction Guaranteed Direct Only 44 Model Aviation GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO 941 2B TEU 415 342 5581M/C VISA COD MON 6PM 10PM SAT & SUN SAM CAUFORNIA liME HATORI HEADERS PIPES MUFFLERS AND ACCESSORIES SO SIZE PIPE LONG O4AMU5 II I SCALE AND NW MUFFLERS SE ThROUGH FRAME ~L ThROUGH FRAME SL RIGHT SIDE MOUNTL AIMORA AlLANTA 1 used frequencies band Perhaps did survey nighttime RCers werent flying As result CB operators increas ingly invasive habits 27 MHz region becoming saturated nearly 15 mil lion walkie-talkie users few emitting illegal radiation affecting safe flight RC planes areas began realize though five 27 MHz RC channels active five years high time push acquisition new RC chan nels different band Third Battle1963-66 As specialist communications law FCC affilia tions Ed Ansell enormously speeded up 1958 acquisition 27 MHz chan nels Having moved California Ansell no longer available AMA sought attorney comparable merit assist negotiating desired new channels AMA soon found what looking Jerry Courtney former Assistant Gen eral Counsel FCC now private prac tice Courtney seeking clients needs outside giant broadcast industry Retained AMA 1963 Courtney quickly initiated action toward obtaining new RC frequencies 72 MHz perfect match AMA still advis es us daythough claims semiretired Turning voluminous RC files over Oz~zi L3I7 SHORT RADIUSMEDIUM RADIUS Courtney thought finally step ping aside quickly disabused notion counsel averred client case AMAmust always part ner attorney state clients needs critique attorneys proposed implementation request Ed Lo renz chairman AMA RC Committee acted committees contact Courtneyand greatly enjoyed experience Serving us com mittee Maynard Hill John Phelps Jack Port Howard McEntee Paul Runge Vernon MacNabb FCC allocation five RC channels 72 MHz band wasnt easily won Among opposition faced fear RC modeler interference part several industrial companies used such RC-controlled equipment overhead cranes Courtney Lorenz persuaded companies probability interfer ence cranes RC plane signals less crane controls acci dentally shooting down RC model plane Time has borne out knowledge has never complaint indus try about RC plane interference After three years concentrated effort AMA Frequency Committee Courtneys law firm emerged Third Battle RC user rights five new 72 MHz frequencies narrow vic tory June 1966 FCC Commissioners Continued page 157 June 1989 45 4 FLASH -j 1st US RIC Flight School Stop Crashing Start Learning Dave Scott Most Experienced Instructor North America Over 3000 hrs flying time time profes sional instructor ue science instruction cannot imitated anywherel ything provided school ially designed Ulti mate Trainer ly 30000 air-miles flownl Original training handbook ning success rate ly vacation area/field prices food/accomodations ACT NOW CLASSES FILLING FASTInfo pack $200 1st US RIC FLIGHT SCHOOL 521 S Sawyer. Shawano WI 54166 17161524-2985 5 Yor 081 Add 0011 f No308-i/S Scale s595 No307 /7 Scale s6%5 U m15Tu ml iTe1 F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 40, 41, 42, 43, 44, 45, 157
Walt Good0 Battle RC Frequencies frequen cies enjoyed today RC fliers have evolved through ongoing series negotiations tween AMA FCC other terested parties since Forties report chroni cles some interplay Part 2 3 THE RC POPULATION grows19521958 Prior acquisition two license-free RC channels RC Nats held late 1940s averaged about 30 entries used Ham frequencies 50 MHz band required Ham operator li cense 1951 new 465 MHz RC gear available two compa nies Citizen-Ship Babcock Models Nats RC entries evenly split between Ham 50 MHz license-free 465 MHz frequencies new 27255 MHz RC channel au thorized FCC came use March 1952 years Nats fre quency usage distribution stood 50% us ing 50 MHz 30% using 465 MHz 20% flying 27 MHz See Table 1 1954 Nats 50% RC fliers us ing 27 MHz frequency 40% 50 MHz Ham channels 465 MHz usage dropped 10% trend confirmed Babcock sales figures three-year period mid-Fifties showed 27 MHz outpac ing 465 MHz units 10 Actual sales 10000 versus 1000 units Thus appears lower cost 27 MHz units both commercial homebuilt attracted bulk RCers Neverthe less 1950 1955 465 MHz units did provide first license-free system serve RC community As Table 1 clearly shows availability 465 MHz gear 1951 spurred rapid crossover 50 MHz frequency However 1958 less expensive home-built gear 27255 MHz taken strong lead 465 MHz usage receded 1958 Nats 40 Model Aviation FCC Docket 10086 published after three years negotiations between AMA FCC announced first home-built RC frequency established 27255 MHz ef fective March 24 1952 transmitter required crystal-controlled less 5 watts major advance no examination required FCC license FCC 529 Before 7J9D2BAI 0012 IXflCATIC2TS C013413S1011 Washington 05 D C i4atter ox Amendment o Part 19 Commissions Rules Regulatons Governing CitiscnsRadio Service 1CKET NO 10036 0 RD t session Fed-ral Communications Commission held its o&fices Washington N C th 13th February Commission having under consideration above captioned matter erovido use frequency 27255 Mc control objects devices radio Citizens 2adlo Service II rare old photograph depicts Bill left Walt right Good attending demonstration early RC equipment Henry Ford hat hand 1940 Ford Airport near Dearborne Ml Note transmitter powered car battery 400-volt dynemotor 30-watt output 72201 Glenview IL over 75% 280 RC en tries used 27 MHz 20% Ham gear scant percentage still 465 MHz availability license-free RC equip ment stimulated rapid growth RC air plane hobbybut certainly didnt eradicate its problems Interference 27255 MHz1958 As earlier test flights shown re gions country radio interference RC models 27255 MHz wasnt gen erally concern Beginning 1958 ever problem surfaced few specific areas key cause certain met ropolitan areas traffic control transmitters adopted same 27255 MHz frequency acquired RC use 1958 RC Nats Chicago po tential conflict severe enough call halt RC event during afternoon rush hour Chicago traffic signals being switched radio different flow mode ease homebound traffic after workand 200-watt traffic transmitter used same 27255 MHz frequency RC fliers Los Angeles Long land NY traffic systems also utilizing transmitters frequencywith Los Angeles earning epithet King Kong among local RCers AMA complained about inter ference FCC reminded us RC users 27255 MHz frequency must ac cept whatever garbage signals might assigned ISM band fre quency part Although AMA did re member caution scarcely antic ipated 200-watt transmitters city wide coverage would considered ap propriate use ISM band Several modelers shall remain name less known upon occasion ease homeward travel using RC transmitters own switching local traffic signals path Much relief radio-controlled traffic signal systems retired use within few years Some Los Angeles area fliers found switching RC gear other frequency released interference caused King Konga strata gem sometimes led bigger prob lems story goes mod eler flying near Los Angeles Sepul veda Basin another came asked could fly too Saying spe cial channel avoid King Kong air borne flier gave newcomer go-ahead second flier launched planeand crashed almost immediately followed short ly crash plane number As RCers learned too late both using 29 MHz frequency course illegal Sidestepping overloaded King Kong channel backfired case addition traffic control transmit ters other sources interfer ence RC ISM-band users Some radio-dispatched trucksbut fortunately fewwere using 27255 MHz channel time medical area di- channels1956-58 As ranks RCers athermy equipment used 27255 MHz increased did desire fly several frequency during patient treatment models same time same field course flying models well away hospitals solved problem typical 27255 MHz receiver period very broad receiving band al megahertz width receptive almost signal within band Char acteristic simple super-regenerative type circuit prevalent wideband receivers susceptible interference narrow-band types came later contrast crystalcontrolled RC transmitters period emitted very narrow band energy hence did cause problem others time Additional RC channels needed sat isfy goal same time avoid ing interference non-RC inhabi tants overloaded 27255 MHz chn nel AMA appealed FCC help resolve needs Second Battle RC frequencies launched status quo relatively undis turbed however until 1956 young communications attorney named Ed Ansell approached AMA volunteer ser vices free charge Having worked within FCC several years Ansell wanted bolster portfolio experience ad vance position private domain decided strategy forging out June 1989 41 Bill Good tuning receiver 1940 Nats Chicago Because inherent instability equipment era frequent tuning requiredsomething like other flight Second Battle additional RC clipping West Coast Model News dated February 16 1952 announced negotia tiona between AMA FCC finally paid off new RC frequency 27255 MHz POWER DIVE Little Planes Hit Bad Beep WALTER WINGO water tank nearby RUNt Virginia sends out beep 1 sep rad signals inutes Acad entv Model Aeronautics says its reason alarming increase model plane crashes re cently Vlat bothers Academy ilioUt ldnk radiowhich notifies its owners waler levelis variety oilier radios arc device hand same M frequency assigned radio-conrolled model planes Sunday doing lilt te lilglm-allitude flying noctl II uooiivni r~of Wheaton said Dr Wallet A nnd l3cthesda golden hysicist chairman ASIAs radio-controlled 5 visury coiimniss' Washington Daily News February 19 1957 dIscussed Virginia water tank trans mitted beeping signai 15 minutes causing RC model controls maifunction al crashing plane Because both using same FCC-assigned frequency 27255 MHz incidents like occurring alarming regularity spurred AMA continuous negotiations FCC new frequencies less interference own link between FCC ap propriate client such AMA Ansell already cognizant some AMAs needs area Radio Con trol also aware FCC preparing docket Citizens Radio Ser vice low-power walkie-talkies 1956 Ansell began drafting AMA assis tance official petition five new RC channels 27 MHz band petition became part FCC Docket #11994 January23 1957 month later Washington Daily News generated little publicity about RC fliers problem story called Lit tle Planes Hit Bad Beep February 19 1957 news feature related RC plane almost shot down ra dio signal local water tank height water tank being measured electronic device sent radio signal distant office reg ular intervals Obviously calibration de vice assigned same 27255 MHz frequency RC modelers used yet another example electronic applica tions swept heavily saturated ISM band known uncompli mentary jargon day Garbage Band FCC established ground rules RC modelers beginning 27255 MHz frequency never exclusive prerogative no conveni ent scapegoats no extenuating alibis Clear ly though after five years RC use sit uation caught up us problems wtth interference worsened time seek additional RC channels RC fliers determination pointed up telling quote abovementioned Washington Daily News article Curtis Plummer head FCCs Safety Special Radio Services declared AMA bunch getting very vocal ago got about 2000 letters telling flight disasters bemoah ing fact can fly plane time contests fact FCC port form re ply handle deluge protest letters RC modelers modelers took part effort owed belated thank-you Due part support September 11 1958 FCC isstted five new RC channels 27 MHz cam paign worked five 27 MHz RC channels spaced 50 kHz sandwiched among 22 Citi zens Band CB channels low-powered two-way voice comnmnication sets spaced 10 kHz shown Table 2 newly established close frequency spacing required narrow-band receiver ca pable selecting specific RC channel desired rather bringing several RC CB channels once Clearly old wideband super-regenerative receiver dropped crystal-controlled superheterodyne receiver answered new requirements narrow-band receiver neces sary precision allowed capture single desired RC channel re ject rest fortunate parallel develop ment then-new transistor would soon replacing vacuum tube yielding smaller better receiver before acquisition five new RC chan nels freed modelers conduct RC Pylon Sailplane competitions up five models simultaneous flight also opened 42 Model Aviation U Model Airplane News January 1959 carrIed report Doris Ed yuike FCCs grant ing five new RC frequencies 27 MHz band new frequencies awarded September 1958 AMA negotiated FCC four years obtain Finaily possible average modeiers fly several RC planes same time way multiple plane fun-flying local club field As sidelight assigning RC CB us ers chunk 27 MHz band FCC obliged take same portion 11-meter Ham band RC mod elers felt grateful Ham operators latter furious time Six years after assignment first RC channel 27255 MHz Second Battle RC channels time being reached satisfying resolution Strange Invitation FCC 1958 before five new channels 27 MHz band activated late 1958 FCC issued invitation AMA participate formers review frequencies between 27 MHz 900 MHz purpose forecast needs various potential users frequen cies seemed strange indeed consider ing additional future RC channels fore five new channels acti vated underlying reason learned FCC wanted draw up future frequency plans encompassing various user groups information would pre sented US Delegation Ge neva convention discussion other participating countries goal make new worldwide frequency assign ments cooperative basis As wed al ready noted countries adopted RC band 27 MHz several using 465 MHz band well AMA accepted invitation opportunity present overall RC fre quency story FCC Commissioners staff review took place mid-1959 helped set stage future re quests additional RC channels needed retrospect ap pears eyes FCC stature AMA increasing icquisition five new 27 MHz band RC channels September 1958 could have timely both RC club fliers large-scale competitions Just two months before new channels activated 1958 Nats RC event Chicago swamped 215 RC entries single 27255 MHz channel large number partly due branch ing RC event five categories three Pattern contestsRudder Intermedi ate Multiplus Scale Pylon So well represented Pattern events competition stretched out four days qualifying flights two days finals During early phase-in 27 MHz frequencies 50 kHz spacing seemed quite compatible new crystalcontrolled transmitters narrow-band superheterodyne receivers came market 1958 1959 Nearly half receivers 1960 Nats superhetero dyne ones Although home-builts still permitted five new channels es Continued page 44 FEDERAL CONMUNICATIONS COMMISS ION Washington 25 D C August 26 1959 77543 VIOLATIONS CF THE CITIZENS RADIO SERVICE RULES Commission sionitoring stations continuing detect violations Citizens Radio Service Rules issuing large numbers citations licensees volntions cited fajl mainly tuc large groups uency operation ths use Ciiizns Radio Service stations communications vhioh permissible undor Rules FCC Bulletin #77548 dated August 26 1959 stated some CSers using illegal high power non-CS channels citations issued violators Trans iation Some CBers causing probiems high-powered gear new RC channels Jamming Thwarts Model Fliers CY CHARLES REm WASHINOTONTha plan clinthed mt sleep atall faiteced p102nd tailspin arasbod Earth d watched Tragedy Nttonsrely ant brennan wan radinaontrnlled motlol Bun primary ennan saab accident ha snetlel aleplarn fans boiling mad sod deeply invalved tha Pedoral Cotnnooi nations Cotaminsion Tha problem thn radIo freqoenay sipted toe model airplann pilot nbsrad albert different radio obleativot An remIt 0 man panbieg twitch operate Ills note malta garage door cutting hi Iwo-way car radio way interrupt radio beam model plane mod eat control AS PUT BY DR WALl KR Good Botba da Md. o eltokeuman fee lb Aandeosy Model Aeronautic Thia yen renaider amen models urn very complicated have 5foea wieg span coat up 55110 morn h 1- Ucwwnnco*aat ononeoc eta l 1 ]TI ug baa sad An excerpt Chicago Daily News March 27 1965 entitled Jamming Thwarts Model Fliers After six years new frequencies CS population increased millions interference adjacent RC spots become intolerable model fliers Again AMA appealed FCC better channels aptly depicted papers cartoon Five new frequencies 72 MHz band authorized May 1966 mentioned clip ping American Modeler September/October 1966 expected greatly reduce interference problems RC planes new RC gear required have FCC typeacceptance home-built units werent permitted restriction considered seri ous few remaining home-builders commercial units quickly made available June 1989 43 New Spectrum Home RC Modelers JEREMIAH COURTNEY Climaxing years work Academy Model Aeronautics FCC approved five new frequencies will enormously redice eliminate interference As anything new questions answered Heres rundown.. inua wlI 101 uu Ii zuvxi BALSA SHUTS 36 48 1 162 33 3322 40 18 243 316249 14 2 58 1323 37 120337 1 163 374831 33234458 37 18 3 5471 45 3163-628255 143 7385 61 5163 85110 38 3 89124 71 12 3110155 34 3165181 I164 58.7648 3324 709458 16 4 8010668 3164 5312275 4 411013484 3/8 4165225129 2 4225261 MATCHED SHEETS 43 3324100 154108 3164120 144131 3D BALM STICKS 3646 1161409 1163810 1161214 3321410 3323812 3321216 191608 18141116 18381218 19121624 3163161116 316381720 316122230 14141624 14361926 14122130 14343444 1414055 5165162128 38382737 38123246 36344256 3815270 12123653 1 2344662 1215978 5/85/84865 34346790 1~414 w BALM TREANGLES 36 1/41425 3183830 1/211235 34 34 45 155 BALSA PLANKS 36 1195 12150 13200 14 280 1123 215 11124360 22225 23 325 24435 343495 34686 TAPERED SHEETS36 1142 65 143 85 38o268 3183 98 123120 CUSTOM CUT CONTEST BALSA Sheets Piecee Sanded Close Tolerances AAA Grade modeler dShippedlOO% areKiln Drie seriousand want performance must try 4-6 lb balsa LIGHT 4-6 LB WOOD36 1323 53 1203 53 1163 53 332363 1183 77 316388 143104 383122 123158 343242 13335 116483 3324100 164115 3164133 144156 384536 124322 ThAILING WOE 36 141 32 5161 14 39 381 12 46 112270 BASS WOOU 3/16311626 311611430 3/162/838 3/1611246 3163460 114 ,114 42 143849 1463480 3/83/660 31811270 31831490 1121/290 UNDLE DEALS. 20-1 11 84338889 2011l64361025 20-3/32 336865 15332436955 151/8336735 10-116436695 153/16336920 10316436835 10-114336655 101144369i30 10318336870 5-318436655 5-112336540 5-134361080 103/32446885 5-118448500 5-3116446600 5-14448645 - *NEW* Hundreds new sizes accessories and- finishing materials Send #10 SASE latest catalog 5P914ICEdTICKS 36 46 118 118 -1725 118 142026 18 382232 31163116 2838 114 1143450 114 3184955 1/4 1124585 3/8 3/8.4869 3/85 1/26077 112 1126688 1/253/47597 SPRUCE TRIANGLES 36 31831847 112112 - 64 31434 - 81 HA5D MAPLE 1436 31636 318 112 318 34 1234 BIRCH DOWELS 16 316 14 516 39 26 40 45 50 58 69 36 09 11 14 25 32 3PLYBIRCH45 16412620 13212445 1/1612455 1/812496 SPLYBINCH 3/3212 1/8412 3/16 12 1/4t12 3/8 12 1/212 48 5-99 625 626 625 725 900 RAI SA HOT L LONE STAR EPOXY -INSTANTOLUELIrE PL 548OROOVEDLO MOUNTS So L,--8 951 o Thck 296 5, 598los Th, 298 Ieha Call fBeS7454394 lOam bpmCeetrelTImelSr,n5662osThok5581/8561553/834/1/840 LONE30o/5982o Tho5501/812 -3153/83/4 5/33/40 _____________________1/462501/231413/16/45 14612495 STAR MODELS coma HandlIng Charge pay UPS Add $3 00 COD $300 extra PP APO FPO 1623 57th St Lubbock TX 79412 565. 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V euo Clevis Remover Clevis Remover designed especipily sit uations davis located very tight spot within fuselage also removes arms off servos removes servo plug-ins Futaba radio receivers use simply insert Clevis Remover between servo arm end clevis tilt right towards thresd ad part davis tool hand-made engraved purchasers name price includes shipping handling Available direct Reynolds Jewelry 1707 Crter St. Vidalla LA 71373 318-3364606 - Its Stock f Immedt ShIpnsent ZENOAH G4237ca In828495 New Quadra 40 CDI 13-bea4og spring start 917595 Rae Quadra 46 614986 Briaghells flywheel 88 Rag Quadra 40 PswatAsaenbly Only points 96896 OUADRAOZENOAH R6f%IR *18O0iplus parts Jim Mesas ERCOUPE PLANS 92388 FuLL-KIT *32896 Jim Mess TOMAHAWKPLANS 62385 PuILKIT 923989 Jim Meager J-2 KITTENPLAN592996 FULL-KIT *21896 510 KADET SENIOR KIT-68989 isass 62260 810 KADET SENIORITA KIT93889 says 81688i ZENOAH 0-23 86ZENOAH G-38 85 FLOATS 48% 1/4 scale ss2l89 ssmpleta hit 94789 18 WWl WHEELS 8P/K Spring Starter 92496 PLANS SUPER STSARMAN 114 iGodlreyl $2896 1/3 TAYLORCRAIT 1/3 CUE NalIt 62885 MGA Paintad Pilot Busts 1/4 s.WW-I WW-2 CIV *1996 Servos H-482 424491289 World 818 forirge modals 94495 Prom sites ER TOP FLflt DYNATHRUST 28% OFF US Quadra FUELTAI6KSlBoz9796320 9896 FIEERGLASSARROWSHAPrS8/18s23lsog 84sr61195 24 No, Sarsiw 92 SOpostuas Bush Cheshorms JIM MESSERS QUALITY MODEL PRODUCTS VaUeyVIewDr Box 43ANgany NY 14706 tablished RC industry quick market acceptable designs encourage younger pilots minimum age dropped 18 12 years RC CB opera tion early transition 27 MHz fre quency smooth new RC channels worked well little iniding problems would develop sooner ex pected leading much earlier resump tion search different channels experienced almost no interference between adjacent RC channels spaced 50 kHz seeing occa sional glitches ii RC model flight caused interference CR walkie-talkies spaced 10 kHz short order began hear reports GB users illegally shifting crystals less crowded RC chan nels documented case interference caused severe injuries out-of control RC plane crashed spectator California instance CRer located near flying field committed two vi olations shifted CR frequency RC channel added 40-watt amplifier could play disc jockey other CRers Armed information RC club bad attempted several times before accident get CRer off RC chan nel FCC able prosecute CR vIolator - Increasing problems interference 1-960 mounting Citizen Band radio us- age hordes operators air brought ever increasing interference RC fliers CBers -were emulating Ham ra dio operators requisite skills legally licensed amateur radio operators stories heard CRers using illegal high-powered amplifiers large directional beam antennas make long-distance contact foreign countries FCC intended Citizen Radio Service used primarily local nec essary useful brief messagesthe le gal power limit five wattsnot continuous unrestricted entertainment con suming up 5000 watts power CBers indulging mod elers suffering repercussions Some five-watt CR station users dis covering five RC channelsand ille gally shifting crystals quiet oa ses avoid high-wattage peers During period recall watching screen spectrum -analyzer showed CR channels active spikes jump ing up down mainly proper fre quency locations five RC spots should have appeared comparatively like lulls several didnt Instead showed active voice modulation CR chan nels indicating illegal non-RC usage Another group CRers called Part 15 Gang exploited loophole Part 15 FCC Regulationsa rule permitting 100milliwatt transn-sission type section 27 MHz band used RC coterie targeted five RC chaqnels claiming appeared least WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITTI Satisfaction Guaranteed Direct Only 44 Model Aviation GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO 941 2B TEU 415 342 5581M/C VISA COD MON 6PM 10PM SAT & SUN SAM CAUFORNIA liME HATORI HEADERS PIPES MUFFLERS AND ACCESSORIES SO SIZE PIPE LONG O4AMU5 II I SCALE AND NW MUFFLERS SE ThROUGH FRAME ~L ThROUGH FRAME SL RIGHT SIDE MOUNTL AIMORA AlLANTA 1 used frequencies band Perhaps did survey nighttime RCers werent flying As result CB operators increas ingly invasive habits 27 MHz region becoming saturated nearly 15 mil lion walkie-talkie users few emitting illegal radiation affecting safe flight RC planes areas began realize though five 27 MHz RC channels active five years high time push acquisition new RC chan nels different band Third Battle1963-66 As specialist communications law FCC affilia tions Ed Ansell enormously speeded up 1958 acquisition 27 MHz chan nels Having moved California Ansell no longer available AMA sought attorney comparable merit assist negotiating desired new channels AMA soon found what looking Jerry Courtney former Assistant Gen eral Counsel FCC now private prac tice Courtney seeking clients needs outside giant broadcast industry Retained AMA 1963 Courtney quickly initiated action toward obtaining new RC frequencies 72 MHz perfect match AMA still advis es us daythough claims semiretired Turning voluminous RC files over Oz~zi L3I7 SHORT RADIUSMEDIUM RADIUS Courtney thought finally step ping aside quickly disabused notion counsel averred client case AMAmust always part ner attorney state clients needs critique attorneys proposed implementation request Ed Lo renz chairman AMA RC Committee acted committees contact Courtneyand greatly enjoyed experience Serving us com mittee Maynard Hill John Phelps Jack Port Howard McEntee Paul Runge Vernon MacNabb FCC allocation five RC channels 72 MHz band wasnt easily won Among opposition faced fear RC modeler interference part several industrial companies used such RC-controlled equipment overhead cranes Courtney Lorenz persuaded companies probability interfer ence cranes RC plane signals less crane controls acci dentally shooting down RC model plane Time has borne out knowledge has never complaint indus try about RC plane interference After three years concentrated effort AMA Frequency Committee Courtneys law firm emerged Third Battle RC user rights five new 72 MHz frequencies narrow vic tory June 1966 FCC Commissioners Continued page 157 June 1989 45 4 FLASH -j 1st US RIC Flight School Stop Crashing Start Learning Dave Scott Most Experienced Instructor North America Over 3000 hrs flying time time profes sional instructor ue science instruction cannot imitated anywherel ything provided school ially designed Ulti mate Trainer ly 30000 air-miles flownl Original training handbook ning success rate ly vacation area/field prices food/accomodations ACT NOW CLASSES FILLING FASTInfo pack $200 1st US RIC FLIGHT SCHOOL 521 S Sawyer. Shawano WI 54166 17161524-2985 5 Yor 081 Add 0011 f No308-i/S Scale s595 No307 /7 Scale s6%5 U m15Tu ml iTe1 F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 40, 41, 42, 43, 44, 45, 157
Walt Good0 Battle RC Frequencies frequen cies enjoyed today RC fliers have evolved through ongoing series negotiations tween AMA FCC other terested parties since Forties report chroni cles some interplay Part 2 3 THE RC POPULATION grows19521958 Prior acquisition two license-free RC channels RC Nats held late 1940s averaged about 30 entries used Ham frequencies 50 MHz band required Ham operator li cense 1951 new 465 MHz RC gear available two compa nies Citizen-Ship Babcock Models Nats RC entries evenly split between Ham 50 MHz license-free 465 MHz frequencies new 27255 MHz RC channel au thorized FCC came use March 1952 years Nats fre quency usage distribution stood 50% us ing 50 MHz 30% using 465 MHz 20% flying 27 MHz See Table 1 1954 Nats 50% RC fliers us ing 27 MHz frequency 40% 50 MHz Ham channels 465 MHz usage dropped 10% trend confirmed Babcock sales figures three-year period mid-Fifties showed 27 MHz outpac ing 465 MHz units 10 Actual sales 10000 versus 1000 units Thus appears lower cost 27 MHz units both commercial homebuilt attracted bulk RCers Neverthe less 1950 1955 465 MHz units did provide first license-free system serve RC community As Table 1 clearly shows availability 465 MHz gear 1951 spurred rapid crossover 50 MHz frequency However 1958 less expensive home-built gear 27255 MHz taken strong lead 465 MHz usage receded 1958 Nats 40 Model Aviation FCC Docket 10086 published after three years negotiations between AMA FCC announced first home-built RC frequency established 27255 MHz ef fective March 24 1952 transmitter required crystal-controlled less 5 watts major advance no examination required FCC license FCC 529 Before 7J9D2BAI 0012 IXflCATIC2TS C013413S1011 Washington 05 D C i4atter ox Amendment o Part 19 Commissions Rules Regulatons Governing CitiscnsRadio Service 1CKET NO 10036 0 RD t session Fed-ral Communications Commission held its o&fices Washington N C th 13th February Commission having under consideration above captioned matter erovido use frequency 27255 Mc control objects devices radio Citizens 2adlo Service II rare old photograph depicts Bill left Walt right Good attending demonstration early RC equipment Henry Ford hat hand 1940 Ford Airport near Dearborne Ml Note transmitter powered car battery 400-volt dynemotor 30-watt output 72201 Glenview IL over 75% 280 RC en tries used 27 MHz 20% Ham gear scant percentage still 465 MHz availability license-free RC equip ment stimulated rapid growth RC air plane hobbybut certainly didnt eradicate its problems Interference 27255 MHz1958 As earlier test flights shown re gions country radio interference RC models 27255 MHz wasnt gen erally concern Beginning 1958 ever problem surfaced few specific areas key cause certain met ropolitan areas traffic control transmitters adopted same 27255 MHz frequency acquired RC use 1958 RC Nats Chicago po tential conflict severe enough call halt RC event during afternoon rush hour Chicago traffic signals being switched radio different flow mode ease homebound traffic after workand 200-watt traffic transmitter used same 27255 MHz frequency RC fliers Los Angeles Long land NY traffic systems also utilizing transmitters frequencywith Los Angeles earning epithet King Kong among local RCers AMA complained about inter ference FCC reminded us RC users 27255 MHz frequency must ac cept whatever garbage signals might assigned ISM band fre quency part Although AMA did re member caution scarcely antic ipated 200-watt transmitters city wide coverage would considered ap propriate use ISM band Several modelers shall remain name less known upon occasion ease homeward travel using RC transmitters own switching local traffic signals path Much relief radio-controlled traffic signal systems retired use within few years Some Los Angeles area fliers found switching RC gear other frequency released interference caused King Konga strata gem sometimes led bigger prob lems story goes mod eler flying near Los Angeles Sepul veda Basin another came asked could fly too Saying spe cial channel avoid King Kong air borne flier gave newcomer go-ahead second flier launched planeand crashed almost immediately followed short ly crash plane number As RCers learned too late both using 29 MHz frequency course illegal Sidestepping overloaded King Kong channel backfired case addition traffic control transmit ters other sources interfer ence RC ISM-band users Some radio-dispatched trucksbut fortunately fewwere using 27255 MHz channel time medical area di- channels1956-58 As ranks RCers athermy equipment used 27255 MHz increased did desire fly several frequency during patient treatment models same time same field course flying models well away hospitals solved problem typical 27255 MHz receiver period very broad receiving band al megahertz width receptive almost signal within band Char acteristic simple super-regenerative type circuit prevalent wideband receivers susceptible interference narrow-band types came later contrast crystalcontrolled RC transmitters period emitted very narrow band energy hence did cause problem others time Additional RC channels needed sat isfy goal same time avoid ing interference non-RC inhabi tants overloaded 27255 MHz chn nel AMA appealed FCC help resolve needs Second Battle RC frequencies launched status quo relatively undis turbed however until 1956 young communications attorney named Ed Ansell approached AMA volunteer ser vices free charge Having worked within FCC several years Ansell wanted bolster portfolio experience ad vance position private domain decided strategy forging out June 1989 41 Bill Good tuning receiver 1940 Nats Chicago Because inherent instability equipment era frequent tuning requiredsomething like other flight Second Battle additional RC clipping West Coast Model News dated February 16 1952 announced negotia tiona between AMA FCC finally paid off new RC frequency 27255 MHz POWER DIVE Little Planes Hit Bad Beep WALTER WINGO water tank nearby RUNt Virginia sends out beep 1 sep rad signals inutes Acad entv Model Aeronautics says its reason alarming increase model plane crashes re cently Vlat bothers Academy ilioUt ldnk radiowhich notifies its owners waler levelis variety oilier radios arc device hand same M frequency assigned radio-conrolled model planes Sunday doing lilt te lilglm-allitude flying noctl II uooiivni r~of Wheaton said Dr Wallet A nnd l3cthesda golden hysicist chairman ASIAs radio-controlled 5 visury coiimniss' Washington Daily News February 19 1957 dIscussed Virginia water tank trans mitted beeping signai 15 minutes causing RC model controls maifunction al crashing plane Because both using same FCC-assigned frequency 27255 MHz incidents like occurring alarming regularity spurred AMA continuous negotiations FCC new frequencies less interference own link between FCC ap propriate client such AMA Ansell already cognizant some AMAs needs area Radio Con trol also aware FCC preparing docket Citizens Radio Ser vice low-power walkie-talkies 1956 Ansell began drafting AMA assis tance official petition five new RC channels 27 MHz band petition became part FCC Docket #11994 January23 1957 month later Washington Daily News generated little publicity about RC fliers problem story called Lit tle Planes Hit Bad Beep February 19 1957 news feature related RC plane almost shot down ra dio signal local water tank height water tank being measured electronic device sent radio signal distant office reg ular intervals Obviously calibration de vice assigned same 27255 MHz frequency RC modelers used yet another example electronic applica tions swept heavily saturated ISM band known uncompli mentary jargon day Garbage Band FCC established ground rules RC modelers beginning 27255 MHz frequency never exclusive prerogative no conveni ent scapegoats no extenuating alibis Clear ly though after five years RC use sit uation caught up us problems wtth interference worsened time seek additional RC channels RC fliers determination pointed up telling quote abovementioned Washington Daily News article Curtis Plummer head FCCs Safety Special Radio Services declared AMA bunch getting very vocal ago got about 2000 letters telling flight disasters bemoah ing fact can fly plane time contests fact FCC port form re ply handle deluge protest letters RC modelers modelers took part effort owed belated thank-you Due part support September 11 1958 FCC isstted five new RC channels 27 MHz cam paign worked five 27 MHz RC channels spaced 50 kHz sandwiched among 22 Citi zens Band CB channels low-powered two-way voice comnmnication sets spaced 10 kHz shown Table 2 newly established close frequency spacing required narrow-band receiver ca pable selecting specific RC channel desired rather bringing several RC CB channels once Clearly old wideband super-regenerative receiver dropped crystal-controlled superheterodyne receiver answered new requirements narrow-band receiver neces sary precision allowed capture single desired RC channel re ject rest fortunate parallel develop ment then-new transistor would soon replacing vacuum tube yielding smaller better receiver before acquisition five new RC chan nels freed modelers conduct RC Pylon Sailplane competitions up five models simultaneous flight also opened 42 Model Aviation U Model Airplane News January 1959 carrIed report Doris Ed yuike FCCs grant ing five new RC frequencies 27 MHz band new frequencies awarded September 1958 AMA negotiated FCC four years obtain Finaily possible average modeiers fly several RC planes same time way multiple plane fun-flying local club field As sidelight assigning RC CB us ers chunk 27 MHz band FCC obliged take same portion 11-meter Ham band RC mod elers felt grateful Ham operators latter furious time Six years after assignment first RC channel 27255 MHz Second Battle RC channels time being reached satisfying resolution Strange Invitation FCC 1958 before five new channels 27 MHz band activated late 1958 FCC issued invitation AMA participate formers review frequencies between 27 MHz 900 MHz purpose forecast needs various potential users frequen cies seemed strange indeed consider ing additional future RC channels fore five new channels acti vated underlying reason learned FCC wanted draw up future frequency plans encompassing various user groups information would pre sented US Delegation Ge neva convention discussion other participating countries goal make new worldwide frequency assign ments cooperative basis As wed al ready noted countries adopted RC band 27 MHz several using 465 MHz band well AMA accepted invitation opportunity present overall RC fre quency story FCC Commissioners staff review took place mid-1959 helped set stage future re quests additional RC channels needed retrospect ap pears eyes FCC stature AMA increasing icquisition five new 27 MHz band RC channels September 1958 could have timely both RC club fliers large-scale competitions Just two months before new channels activated 1958 Nats RC event Chicago swamped 215 RC entries single 27255 MHz channel large number partly due branch ing RC event five categories three Pattern contestsRudder Intermedi ate Multiplus Scale Pylon So well represented Pattern events competition stretched out four days qualifying flights two days finals During early phase-in 27 MHz frequencies 50 kHz spacing seemed quite compatible new crystalcontrolled transmitters narrow-band superheterodyne receivers came market 1958 1959 Nearly half receivers 1960 Nats superhetero dyne ones Although home-builts still permitted five new channels es Continued page 44 FEDERAL CONMUNICATIONS COMMISS ION Washington 25 D C August 26 1959 77543 VIOLATIONS CF THE CITIZENS RADIO SERVICE RULES Commission sionitoring stations continuing detect violations Citizens Radio Service Rules issuing large numbers citations licensees volntions cited fajl mainly tuc large groups uency operation ths use Ciiizns Radio Service stations communications vhioh permissible undor Rules FCC Bulletin #77548 dated August 26 1959 stated some CSers using illegal high power non-CS channels citations issued violators Trans iation Some CBers causing probiems high-powered gear new RC channels Jamming Thwarts Model Fliers CY CHARLES REm WASHINOTONTha plan clinthed mt sleep atall faiteced p102nd tailspin arasbod Earth d watched Tragedy Nttonsrely ant brennan wan radinaontrnlled motlol Bun primary ennan saab accident ha snetlel aleplarn fans boiling mad sod deeply invalved tha Pedoral Cotnnooi nations Cotaminsion Tha problem thn radIo freqoenay sipted toe model airplann pilot nbsrad albert different radio obleativot An remIt 0 man panbieg twitch operate Ills note malta garage door cutting hi Iwo-way car radio way interrupt radio beam model plane mod eat control AS PUT BY DR WALl KR Good Botba da Md. o eltokeuman fee lb Aandeosy Model Aeronautic Thia yen renaider amen models urn very complicated have 5foea wieg span coat up 55110 morn h 1- Ucwwnnco*aat ononeoc eta l 1 ]TI ug baa sad An excerpt Chicago Daily News March 27 1965 entitled Jamming Thwarts Model Fliers After six years new frequencies CS population increased millions interference adjacent RC spots become intolerable model fliers Again AMA appealed FCC better channels aptly depicted papers cartoon Five new frequencies 72 MHz band authorized May 1966 mentioned clip ping American Modeler September/October 1966 expected greatly reduce interference problems RC planes new RC gear required have FCC typeacceptance home-built units werent permitted restriction considered seri ous few remaining home-builders commercial units quickly made available June 1989 43 New Spectrum Home RC Modelers JEREMIAH COURTNEY Climaxing years work Academy Model Aeronautics FCC approved five new frequencies will enormously redice eliminate interference As anything new questions answered Heres rundown.. inua wlI 101 uu Ii zuvxi BALSA SHUTS 36 48 1 162 33 3322 40 18 243 316249 14 2 58 1323 37 120337 1 163 374831 33234458 37 18 3 5471 45 3163-628255 143 7385 61 5163 85110 38 3 89124 71 12 3110155 34 3165181 I164 58.7648 3324 709458 16 4 8010668 3164 5312275 4 411013484 3/8 4165225129 2 4225261 MATCHED SHEETS 43 3324100 154108 3164120 144131 3D BALM STICKS 3646 1161409 1163810 1161214 3321410 3323812 3321216 191608 18141116 18381218 19121624 3163161116 316381720 316122230 14141624 14361926 14122130 14343444 1414055 5165162128 38382737 38123246 36344256 3815270 12123653 1 2344662 1215978 5/85/84865 34346790 1~414 w BALM TREANGLES 36 1/41425 3183830 1/211235 34 34 45 155 BALSA PLANKS 36 1195 12150 13200 14 280 1123 215 11124360 22225 23 325 24435 343495 34686 TAPERED SHEETS36 1142 65 143 85 38o268 3183 98 123120 CUSTOM CUT CONTEST BALSA Sheets Piecee Sanded Close Tolerances AAA Grade modeler dShippedlOO% areKiln Drie seriousand want performance must try 4-6 lb balsa LIGHT 4-6 LB WOOD36 1323 53 1203 53 1163 53 332363 1183 77 316388 143104 383122 123158 343242 13335 116483 3324100 164115 3164133 144156 384536 124322 ThAILING WOE 36 141 32 5161 14 39 381 12 46 112270 BASS WOOU 3/16311626 311611430 3/162/838 3/1611246 3163460 114 ,114 42 143849 1463480 3/83/660 31811270 31831490 1121/290 UNDLE DEALS. 20-1 11 84338889 2011l64361025 20-3/32 336865 15332436955 151/8336735 10-116436695 153/16336920 10316436835 10-114336655 101144369i30 10318336870 5-318436655 5-112336540 5-134361080 103/32446885 5-118448500 5-3116446600 5-14448645 - *NEW* Hundreds new sizes accessories and- finishing materials Send #10 SASE latest catalog 5P914ICEdTICKS 36 46 118 118 -1725 118 142026 18 382232 31163116 2838 114 1143450 114 3184955 1/4 1124585 3/8 3/8.4869 3/85 1/26077 112 1126688 1/253/47597 SPRUCE TRIANGLES 36 31831847 112112 - 64 31434 - 81 HA5D MAPLE 1436 31636 318 112 318 34 1234 BIRCH DOWELS 16 316 14 516 39 26 40 45 50 58 69 36 09 11 14 25 32 3PLYBIRCH45 16412620 13212445 1/1612455 1/812496 SPLYBINCH 3/3212 1/8412 3/16 12 1/4t12 3/8 12 1/212 48 5-99 625 626 625 725 900 RAI SA HOT L LONE STAR EPOXY -INSTANTOLUELIrE PL 548OROOVEDLO MOUNTS So L,--8 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V euo Clevis Remover Clevis Remover designed especipily sit uations davis located very tight spot within fuselage also removes arms off servos removes servo plug-ins Futaba radio receivers use simply insert Clevis Remover between servo arm end clevis tilt right towards thresd ad part davis tool hand-made engraved purchasers name price includes shipping handling Available direct Reynolds Jewelry 1707 Crter St. Vidalla LA 71373 318-3364606 - Its Stock f Immedt ShIpnsent ZENOAH G4237ca In828495 New Quadra 40 CDI 13-bea4og spring start 917595 Rae Quadra 46 614986 Briaghells flywheel 88 Rag Quadra 40 PswatAsaenbly Only points 96896 OUADRAOZENOAH R6f%IR *18O0iplus parts Jim Mesas ERCOUPE PLANS 92388 FuLL-KIT *32896 Jim Mess TOMAHAWKPLANS 62385 PuILKIT 923989 Jim Meager J-2 KITTENPLAN592996 FULL-KIT *21896 510 KADET SENIOR KIT-68989 isass 62260 810 KADET SENIORITA KIT93889 says 81688i ZENOAH 0-23 86ZENOAH G-38 85 FLOATS 48% 1/4 scale ss2l89 ssmpleta hit 94789 18 WWl WHEELS 8P/K Spring Starter 92496 PLANS SUPER STSARMAN 114 iGodlreyl $2896 1/3 TAYLORCRAIT 1/3 CUE NalIt 62885 MGA Paintad Pilot Busts 1/4 s.WW-I WW-2 CIV *1996 Servos H-482 424491289 World 818 forirge modals 94495 Prom sites ER TOP FLflt DYNATHRUST 28% OFF US Quadra FUELTAI6KSlBoz9796320 9896 FIEERGLASSARROWSHAPrS8/18s23lsog 84sr61195 24 No, Sarsiw 92 SOpostuas Bush Cheshorms JIM MESSERS QUALITY MODEL PRODUCTS VaUeyVIewDr Box 43ANgany NY 14706 tablished RC industry quick market acceptable designs encourage younger pilots minimum age dropped 18 12 years RC CB opera tion early transition 27 MHz fre quency smooth new RC channels worked well little iniding problems would develop sooner ex pected leading much earlier resump tion search different channels experienced almost no interference between adjacent RC channels spaced 50 kHz seeing occa sional glitches ii RC model flight caused interference CR walkie-talkies spaced 10 kHz short order began hear reports GB users illegally shifting crystals less crowded RC chan nels documented case interference caused severe injuries out-of control RC plane crashed spectator California instance CRer located near flying field committed two vi olations shifted CR frequency RC channel added 40-watt amplifier could play disc jockey other CRers Armed information RC club bad attempted several times before accident get CRer off RC chan nel FCC able prosecute CR vIolator - Increasing problems interference 1-960 mounting Citizen Band radio us- age hordes operators air brought ever increasing interference RC fliers CBers -were emulating Ham ra dio operators requisite skills legally licensed amateur radio operators stories heard CRers using illegal high-powered amplifiers large directional beam antennas make long-distance contact foreign countries FCC intended Citizen Radio Service used primarily local nec essary useful brief messagesthe le gal power limit five wattsnot continuous unrestricted entertainment con suming up 5000 watts power CBers indulging mod elers suffering repercussions Some five-watt CR station users dis covering five RC channelsand ille gally shifting crystals quiet oa ses avoid high-wattage peers During period recall watching screen spectrum -analyzer showed CR channels active spikes jump ing up down mainly proper fre quency locations five RC spots should have appeared comparatively like lulls several didnt Instead showed active voice modulation CR chan nels indicating illegal non-RC usage Another group CRers called Part 15 Gang exploited loophole Part 15 FCC Regulationsa rule permitting 100milliwatt transn-sission type section 27 MHz band used RC coterie targeted five RC chaqnels claiming appeared least WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITTI Satisfaction Guaranteed Direct Only 44 Model Aviation GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO 941 2B TEU 415 342 5581M/C VISA COD MON 6PM 10PM SAT & SUN SAM CAUFORNIA liME HATORI HEADERS PIPES MUFFLERS AND ACCESSORIES SO SIZE PIPE LONG O4AMU5 II I SCALE AND NW MUFFLERS SE ThROUGH FRAME ~L ThROUGH FRAME SL RIGHT SIDE MOUNTL AIMORA AlLANTA 1 used frequencies band Perhaps did survey nighttime RCers werent flying As result CB operators increas ingly invasive habits 27 MHz region becoming saturated nearly 15 mil lion walkie-talkie users few emitting illegal radiation affecting safe flight RC planes areas began realize though five 27 MHz RC channels active five years high time push acquisition new RC chan nels different band Third Battle1963-66 As specialist communications law FCC affilia tions Ed Ansell enormously speeded up 1958 acquisition 27 MHz chan nels Having moved California Ansell no longer available AMA sought attorney comparable merit assist negotiating desired new channels AMA soon found what looking Jerry Courtney former Assistant Gen eral Counsel FCC now private prac tice Courtney seeking clients needs outside giant broadcast industry Retained AMA 1963 Courtney quickly initiated action toward obtaining new RC frequencies 72 MHz perfect match AMA still advis es us daythough claims semiretired Turning voluminous RC files over Oz~zi L3I7 SHORT RADIUSMEDIUM RADIUS Courtney thought finally step ping aside quickly disabused notion counsel averred client case AMAmust always part ner attorney state clients needs critique attorneys proposed implementation request Ed Lo renz chairman AMA RC Committee acted committees contact Courtneyand greatly enjoyed experience Serving us com mittee Maynard Hill John Phelps Jack Port Howard McEntee Paul Runge Vernon MacNabb FCC allocation five RC channels 72 MHz band wasnt easily won Among opposition faced fear RC modeler interference part several industrial companies used such RC-controlled equipment overhead cranes Courtney Lorenz persuaded companies probability interfer ence cranes RC plane signals less crane controls acci dentally shooting down RC model plane Time has borne out knowledge has never complaint indus try about RC plane interference After three years concentrated effort AMA Frequency Committee Courtneys law firm emerged Third Battle RC user rights five new 72 MHz frequencies narrow vic tory June 1966 FCC Commissioners Continued page 157 June 1989 45 4 FLASH -j 1st US RIC Flight School Stop Crashing Start Learning Dave Scott Most Experienced Instructor North America Over 3000 hrs flying time time profes sional instructor ue science instruction cannot imitated anywherel ything provided school ially designed Ulti mate Trainer ly 30000 air-miles flownl Original training handbook ning success rate ly vacation area/field prices food/accomodations ACT NOW CLASSES FILLING FASTInfo pack $200 1st US RIC FLIGHT SCHOOL 521 S Sawyer. Shawano WI 54166 17161524-2985 5 Yor 081 Add 0011 f No308-i/S Scale s595 No307 /7 Scale s6%5 U m15Tu ml iTe1 F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 40, 41, 42, 43, 44, 45, 157
Walt Good0 Battle RC Frequencies frequen cies enjoyed today RC fliers have evolved through ongoing series negotiations tween AMA FCC other terested parties since Forties report chroni cles some interplay Part 2 3 THE RC POPULATION grows19521958 Prior acquisition two license-free RC channels RC Nats held late 1940s averaged about 30 entries used Ham frequencies 50 MHz band required Ham operator li cense 1951 new 465 MHz RC gear available two compa nies Citizen-Ship Babcock Models Nats RC entries evenly split between Ham 50 MHz license-free 465 MHz frequencies new 27255 MHz RC channel au thorized FCC came use March 1952 years Nats fre quency usage distribution stood 50% us ing 50 MHz 30% using 465 MHz 20% flying 27 MHz See Table 1 1954 Nats 50% RC fliers us ing 27 MHz frequency 40% 50 MHz Ham channels 465 MHz usage dropped 10% trend confirmed Babcock sales figures three-year period mid-Fifties showed 27 MHz outpac ing 465 MHz units 10 Actual sales 10000 versus 1000 units Thus appears lower cost 27 MHz units both commercial homebuilt attracted bulk RCers Neverthe less 1950 1955 465 MHz units did provide first license-free system serve RC community As Table 1 clearly shows availability 465 MHz gear 1951 spurred rapid crossover 50 MHz frequency However 1958 less expensive home-built gear 27255 MHz taken strong lead 465 MHz usage receded 1958 Nats 40 Model Aviation FCC Docket 10086 published after three years negotiations between AMA FCC announced first home-built RC frequency established 27255 MHz ef fective March 24 1952 transmitter required crystal-controlled less 5 watts major advance no examination required FCC license FCC 529 Before 7J9D2BAI 0012 IXflCATIC2TS C013413S1011 Washington 05 D C i4atter ox Amendment o Part 19 Commissions Rules Regulatons Governing CitiscnsRadio Service 1CKET NO 10036 0 RD t session Fed-ral Communications Commission held its o&fices Washington N C th 13th February Commission having under consideration above captioned matter erovido use frequency 27255 Mc control objects devices radio Citizens 2adlo Service II rare old photograph depicts Bill left Walt right Good attending demonstration early RC equipment Henry Ford hat hand 1940 Ford Airport near Dearborne Ml Note transmitter powered car battery 400-volt dynemotor 30-watt output 72201 Glenview IL over 75% 280 RC en tries used 27 MHz 20% Ham gear scant percentage still 465 MHz availability license-free RC equip ment stimulated rapid growth RC air plane hobbybut certainly didnt eradicate its problems Interference 27255 MHz1958 As earlier test flights shown re gions country radio interference RC models 27255 MHz wasnt gen erally concern Beginning 1958 ever problem surfaced few specific areas key cause certain met ropolitan areas traffic control transmitters adopted same 27255 MHz frequency acquired RC use 1958 RC Nats Chicago po tential conflict severe enough call halt RC event during afternoon rush hour Chicago traffic signals being switched radio different flow mode ease homebound traffic after workand 200-watt traffic transmitter used same 27255 MHz frequency RC fliers Los Angeles Long land NY traffic systems also utilizing transmitters frequencywith Los Angeles earning epithet King Kong among local RCers AMA complained about inter ference FCC reminded us RC users 27255 MHz frequency must ac cept whatever garbage signals might assigned ISM band fre quency part Although AMA did re member caution scarcely antic ipated 200-watt transmitters city wide coverage would considered ap propriate use ISM band Several modelers shall remain name less known upon occasion ease homeward travel using RC transmitters own switching local traffic signals path Much relief radio-controlled traffic signal systems retired use within few years Some Los Angeles area fliers found switching RC gear other frequency released interference caused King Konga strata gem sometimes led bigger prob lems story goes mod eler flying near Los Angeles Sepul veda Basin another came asked could fly too Saying spe cial channel avoid King Kong air borne flier gave newcomer go-ahead second flier launched planeand crashed almost immediately followed short ly crash plane number As RCers learned too late both using 29 MHz frequency course illegal Sidestepping overloaded King Kong channel backfired case addition traffic control transmit ters other sources interfer ence RC ISM-band users Some radio-dispatched trucksbut fortunately fewwere using 27255 MHz channel time medical area di- channels1956-58 As ranks RCers athermy equipment used 27255 MHz increased did desire fly several frequency during patient treatment models same time same field course flying models well away hospitals solved problem typical 27255 MHz receiver period very broad receiving band al megahertz width receptive almost signal within band Char acteristic simple super-regenerative type circuit prevalent wideband receivers susceptible interference narrow-band types came later contrast crystalcontrolled RC transmitters period emitted very narrow band energy hence did cause problem others time Additional RC channels needed sat isfy goal same time avoid ing interference non-RC inhabi tants overloaded 27255 MHz chn nel AMA appealed FCC help resolve needs Second Battle RC frequencies launched status quo relatively undis turbed however until 1956 young communications attorney named Ed Ansell approached AMA volunteer ser vices free charge Having worked within FCC several years Ansell wanted bolster portfolio experience ad vance position private domain decided strategy forging out June 1989 41 Bill Good tuning receiver 1940 Nats Chicago Because inherent instability equipment era frequent tuning requiredsomething like other flight Second Battle additional RC clipping West Coast Model News dated February 16 1952 announced negotia tiona between AMA FCC finally paid off new RC frequency 27255 MHz POWER DIVE Little Planes Hit Bad Beep WALTER WINGO water tank nearby RUNt Virginia sends out beep 1 sep rad signals inutes Acad entv Model Aeronautics says its reason alarming increase model plane crashes re cently Vlat bothers Academy ilioUt ldnk radiowhich notifies its owners waler levelis variety oilier radios arc device hand same M frequency assigned radio-conrolled model planes Sunday doing lilt te lilglm-allitude flying noctl II uooiivni r~of Wheaton said Dr Wallet A nnd l3cthesda golden hysicist chairman ASIAs radio-controlled 5 visury coiimniss' Washington Daily News February 19 1957 dIscussed Virginia water tank trans mitted beeping signai 15 minutes causing RC model controls maifunction al crashing plane Because both using same FCC-assigned frequency 27255 MHz incidents like occurring alarming regularity spurred AMA continuous negotiations FCC new frequencies less interference own link between FCC ap propriate client such AMA Ansell already cognizant some AMAs needs area Radio Con trol also aware FCC preparing docket Citizens Radio Ser vice low-power walkie-talkies 1956 Ansell began drafting AMA assis tance official petition five new RC channels 27 MHz band petition became part FCC Docket #11994 January23 1957 month later Washington Daily News generated little publicity about RC fliers problem story called Lit tle Planes Hit Bad Beep February 19 1957 news feature related RC plane almost shot down ra dio signal local water tank height water tank being measured electronic device sent radio signal distant office reg ular intervals Obviously calibration de vice assigned same 27255 MHz frequency RC modelers used yet another example electronic applica tions swept heavily saturated ISM band known uncompli mentary jargon day Garbage Band FCC established ground rules RC modelers beginning 27255 MHz frequency never exclusive prerogative no conveni ent scapegoats no extenuating alibis Clear ly though after five years RC use sit uation caught up us problems wtth interference worsened time seek additional RC channels RC fliers determination pointed up telling quote abovementioned Washington Daily News article Curtis Plummer head FCCs Safety Special Radio Services declared AMA bunch getting very vocal ago got about 2000 letters telling flight disasters bemoah ing fact can fly plane time contests fact FCC port form re ply handle deluge protest letters RC modelers modelers took part effort owed belated thank-you Due part support September 11 1958 FCC isstted five new RC channels 27 MHz cam paign worked five 27 MHz RC channels spaced 50 kHz sandwiched among 22 Citi zens Band CB channels low-powered two-way voice comnmnication sets spaced 10 kHz shown Table 2 newly established close frequency spacing required narrow-band receiver ca pable selecting specific RC channel desired rather bringing several RC CB channels once Clearly old wideband super-regenerative receiver dropped crystal-controlled superheterodyne receiver answered new requirements narrow-band receiver neces sary precision allowed capture single desired RC channel re ject rest fortunate parallel develop ment then-new transistor would soon replacing vacuum tube yielding smaller better receiver before acquisition five new RC chan nels freed modelers conduct RC Pylon Sailplane competitions up five models simultaneous flight also opened 42 Model Aviation U Model Airplane News January 1959 carrIed report Doris Ed yuike FCCs grant ing five new RC frequencies 27 MHz band new frequencies awarded September 1958 AMA negotiated FCC four years obtain Finaily possible average modeiers fly several RC planes same time way multiple plane fun-flying local club field As sidelight assigning RC CB us ers chunk 27 MHz band FCC obliged take same portion 11-meter Ham band RC mod elers felt grateful Ham operators latter furious time Six years after assignment first RC channel 27255 MHz Second Battle RC channels time being reached satisfying resolution Strange Invitation FCC 1958 before five new channels 27 MHz band activated late 1958 FCC issued invitation AMA participate formers review frequencies between 27 MHz 900 MHz purpose forecast needs various potential users frequen cies seemed strange indeed consider ing additional future RC channels fore five new channels acti vated underlying reason learned FCC wanted draw up future frequency plans encompassing various user groups information would pre sented US Delegation Ge neva convention discussion other participating countries goal make new worldwide frequency assign ments cooperative basis As wed al ready noted countries adopted RC band 27 MHz several using 465 MHz band well AMA accepted invitation opportunity present overall RC fre quency story FCC Commissioners staff review took place mid-1959 helped set stage future re quests additional RC channels needed retrospect ap pears eyes FCC stature AMA increasing icquisition five new 27 MHz band RC channels September 1958 could have timely both RC club fliers large-scale competitions Just two months before new channels activated 1958 Nats RC event Chicago swamped 215 RC entries single 27255 MHz channel large number partly due branch ing RC event five categories three Pattern contestsRudder Intermedi ate Multiplus Scale Pylon So well represented Pattern events competition stretched out four days qualifying flights two days finals During early phase-in 27 MHz frequencies 50 kHz spacing seemed quite compatible new crystalcontrolled transmitters narrow-band superheterodyne receivers came market 1958 1959 Nearly half receivers 1960 Nats superhetero dyne ones Although home-builts still permitted five new channels es Continued page 44 FEDERAL CONMUNICATIONS COMMISS ION Washington 25 D C August 26 1959 77543 VIOLATIONS CF THE CITIZENS RADIO SERVICE RULES Commission sionitoring stations continuing detect violations Citizens Radio Service Rules issuing large numbers citations licensees volntions cited fajl mainly tuc large groups uency operation ths use Ciiizns Radio Service stations communications vhioh permissible undor Rules FCC Bulletin #77548 dated August 26 1959 stated some CSers using illegal high power non-CS channels citations issued violators Trans iation Some CBers causing probiems high-powered gear new RC channels Jamming Thwarts Model Fliers CY CHARLES REm WASHINOTONTha plan clinthed mt sleep atall faiteced p102nd tailspin arasbod Earth d watched Tragedy Nttonsrely ant brennan wan radinaontrnlled motlol Bun primary ennan saab accident ha snetlel aleplarn fans boiling mad sod deeply invalved tha Pedoral Cotnnooi nations Cotaminsion Tha problem thn radIo freqoenay sipted toe model airplann pilot nbsrad albert different radio obleativot An remIt 0 man panbieg twitch operate Ills note malta garage door cutting hi Iwo-way car radio way interrupt radio beam model plane mod eat control AS PUT BY DR WALl KR Good Botba da Md. o eltokeuman fee lb Aandeosy Model Aeronautic Thia yen renaider amen models urn very complicated have 5foea wieg span coat up 55110 morn h 1- Ucwwnnco*aat ononeoc eta l 1 ]TI ug baa sad An excerpt Chicago Daily News March 27 1965 entitled Jamming Thwarts Model Fliers After six years new frequencies CS population increased millions interference adjacent RC spots become intolerable model fliers Again AMA appealed FCC better channels aptly depicted papers cartoon Five new frequencies 72 MHz band authorized May 1966 mentioned clip ping American Modeler September/October 1966 expected greatly reduce interference problems RC planes new RC gear required have FCC typeacceptance home-built units werent permitted restriction considered seri ous few remaining home-builders commercial units quickly made available June 1989 43 New Spectrum Home RC Modelers JEREMIAH COURTNEY Climaxing years work Academy Model Aeronautics FCC approved five new frequencies will enormously redice eliminate interference As anything new questions answered Heres rundown.. inua wlI 101 uu Ii zuvxi BALSA SHUTS 36 48 1 162 33 3322 40 18 243 316249 14 2 58 1323 37 120337 1 163 374831 33234458 37 18 3 5471 45 3163-628255 143 7385 61 5163 85110 38 3 89124 71 12 3110155 34 3165181 I164 58.7648 3324 709458 16 4 8010668 3164 5312275 4 411013484 3/8 4165225129 2 4225261 MATCHED SHEETS 43 3324100 154108 3164120 144131 3D BALM STICKS 3646 1161409 1163810 1161214 3321410 3323812 3321216 191608 18141116 18381218 19121624 3163161116 316381720 316122230 14141624 14361926 14122130 14343444 1414055 5165162128 38382737 38123246 36344256 3815270 12123653 1 2344662 1215978 5/85/84865 34346790 1~414 w BALM TREANGLES 36 1/41425 3183830 1/211235 34 34 45 155 BALSA PLANKS 36 1195 12150 13200 14 280 1123 215 11124360 22225 23 325 24435 343495 34686 TAPERED SHEETS36 1142 65 143 85 38o268 3183 98 123120 CUSTOM CUT CONTEST BALSA Sheets Piecee Sanded Close Tolerances AAA Grade modeler dShippedlOO% areKiln Drie seriousand want performance must try 4-6 lb balsa LIGHT 4-6 LB WOOD36 1323 53 1203 53 1163 53 332363 1183 77 316388 143104 383122 123158 343242 13335 116483 3324100 164115 3164133 144156 384536 124322 ThAILING WOE 36 141 32 5161 14 39 381 12 46 112270 BASS WOOU 3/16311626 311611430 3/162/838 3/1611246 3163460 114 ,114 42 143849 1463480 3/83/660 31811270 31831490 1121/290 UNDLE DEALS. 20-1 11 84338889 2011l64361025 20-3/32 336865 15332436955 151/8336735 10-116436695 153/16336920 10316436835 10-114336655 101144369i30 10318336870 5-318436655 5-112336540 5-134361080 103/32446885 5-118448500 5-3116446600 5-14448645 - *NEW* Hundreds new sizes accessories and- finishing materials Send #10 SASE latest catalog 5P914ICEdTICKS 36 46 118 118 -1725 118 142026 18 382232 31163116 2838 114 1143450 114 3184955 1/4 1124585 3/8 3/8.4869 3/85 1/26077 112 1126688 1/253/47597 SPRUCE TRIANGLES 36 31831847 112112 - 64 31434 - 81 HA5D MAPLE 1436 31636 318 112 318 34 1234 BIRCH DOWELS 16 316 14 516 39 26 40 45 50 58 69 36 09 11 14 25 32 3PLYBIRCH45 16412620 13212445 1/1612455 1/812496 SPLYBINCH 3/3212 1/8412 3/16 12 1/4t12 3/8 12 1/212 48 5-99 625 626 625 725 900 RAI SA HOT L LONE STAR EPOXY -INSTANTOLUELIrE PL 548OROOVEDLO MOUNTS So L,--8 951 o Thck 296 5, 598los Th, 298 Ieha Call fBeS7454394 lOam bpmCeetrelTImelSr,n5662osThok5581/8561553/834/1/840 LONE30o/5982o Tho5501/812 -3153/83/4 5/33/40 _____________________1/462501/231413/16/45 14612495 STAR MODELS coma HandlIng Charge pay UPS Add $3 00 COD $300 extra PP APO FPO 1623 57th St Lubbock TX 79412 565. Weaccept Visa MasteiCard personal checks orCOD 661% tax InTexas US curmncyonly Minimum Wood Order *1000 9 V. V euo Clevis Remover Clevis Remover designed especipily sit uations davis located very tight spot within fuselage also removes arms off servos removes servo plug-ins Futaba radio receivers use simply insert Clevis Remover between servo arm end clevis tilt right towards thresd ad part davis tool hand-made engraved purchasers name price includes shipping handling Available direct Reynolds Jewelry 1707 Crter St. Vidalla LA 71373 318-3364606 - Its Stock f Immedt ShIpnsent ZENOAH G4237ca In828495 New Quadra 40 CDI 13-bea4og spring start 917595 Rae Quadra 46 614986 Briaghells flywheel 88 Rag Quadra 40 PswatAsaenbly Only points 96896 OUADRAOZENOAH R6f%IR *18O0iplus parts Jim Mesas ERCOUPE PLANS 92388 FuLL-KIT *32896 Jim Mess TOMAHAWKPLANS 62385 PuILKIT 923989 Jim Meager J-2 KITTENPLAN592996 FULL-KIT *21896 510 KADET SENIOR KIT-68989 isass 62260 810 KADET SENIORITA KIT93889 says 81688i ZENOAH 0-23 86ZENOAH G-38 85 FLOATS 48% 1/4 scale ss2l89 ssmpleta hit 94789 18 WWl WHEELS 8P/K Spring Starter 92496 PLANS SUPER STSARMAN 114 iGodlreyl $2896 1/3 TAYLORCRAIT 1/3 CUE NalIt 62885 MGA Paintad Pilot Busts 1/4 s.WW-I WW-2 CIV *1996 Servos H-482 424491289 World 818 forirge modals 94495 Prom sites ER TOP FLflt DYNATHRUST 28% OFF US Quadra FUELTAI6KSlBoz9796320 9896 FIEERGLASSARROWSHAPrS8/18s23lsog 84sr61195 24 No, Sarsiw 92 SOpostuas Bush Cheshorms JIM MESSERS QUALITY MODEL PRODUCTS VaUeyVIewDr Box 43ANgany NY 14706 tablished RC industry quick market acceptable designs encourage younger pilots minimum age dropped 18 12 years RC CB opera tion early transition 27 MHz fre quency smooth new RC channels worked well little iniding problems would develop sooner ex pected leading much earlier resump tion search different channels experienced almost no interference between adjacent RC channels spaced 50 kHz seeing occa sional glitches ii RC model flight caused interference CR walkie-talkies spaced 10 kHz short order began hear reports GB users illegally shifting crystals less crowded RC chan nels documented case interference caused severe injuries out-of control RC plane crashed spectator California instance CRer located near flying field committed two vi olations shifted CR frequency RC channel added 40-watt amplifier could play disc jockey other CRers Armed information RC club bad attempted several times before accident get CRer off RC chan nel FCC able prosecute CR vIolator - Increasing problems interference 1-960 mounting Citizen Band radio us- age hordes operators air brought ever increasing interference RC fliers CBers -were emulating Ham ra dio operators requisite skills legally licensed amateur radio operators stories heard CRers using illegal high-powered amplifiers large directional beam antennas make long-distance contact foreign countries FCC intended Citizen Radio Service used primarily local nec essary useful brief messagesthe le gal power limit five wattsnot continuous unrestricted entertainment con suming up 5000 watts power CBers indulging mod elers suffering repercussions Some five-watt CR station users dis covering five RC channelsand ille gally shifting crystals quiet oa ses avoid high-wattage peers During period recall watching screen spectrum -analyzer showed CR channels active spikes jump ing up down mainly proper fre quency locations five RC spots should have appeared comparatively like lulls several didnt Instead showed active voice modulation CR chan nels indicating illegal non-RC usage Another group CRers called Part 15 Gang exploited loophole Part 15 FCC Regulationsa rule permitting 100milliwatt transn-sission type section 27 MHz band used RC coterie targeted five RC chaqnels claiming appeared least WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITTI Satisfaction Guaranteed Direct Only 44 Model Aviation GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO 941 2B TEU 415 342 5581M/C VISA COD MON 6PM 10PM SAT & SUN SAM CAUFORNIA liME HATORI HEADERS PIPES MUFFLERS AND ACCESSORIES SO SIZE PIPE LONG O4AMU5 II I SCALE AND NW MUFFLERS SE ThROUGH FRAME ~L ThROUGH FRAME SL RIGHT SIDE MOUNTL AIMORA AlLANTA 1 used frequencies band Perhaps did survey nighttime RCers werent flying As result CB operators increas ingly invasive habits 27 MHz region becoming saturated nearly 15 mil lion walkie-talkie users few emitting illegal radiation affecting safe flight RC planes areas began realize though five 27 MHz RC channels active five years high time push acquisition new RC chan nels different band Third Battle1963-66 As specialist communications law FCC affilia tions Ed Ansell enormously speeded up 1958 acquisition 27 MHz chan nels Having moved California Ansell no longer available AMA sought attorney comparable merit assist negotiating desired new channels AMA soon found what looking Jerry Courtney former Assistant Gen eral Counsel FCC now private prac tice Courtney seeking clients needs outside giant broadcast industry Retained AMA 1963 Courtney quickly initiated action toward obtaining new RC frequencies 72 MHz perfect match AMA still advis es us daythough claims semiretired Turning voluminous RC files over Oz~zi L3I7 SHORT RADIUSMEDIUM RADIUS Courtney thought finally step ping aside quickly disabused notion counsel averred client case AMAmust always part ner attorney state clients needs critique attorneys proposed implementation request Ed Lo renz chairman AMA RC Committee acted committees contact Courtneyand greatly enjoyed experience Serving us com mittee Maynard Hill John Phelps Jack Port Howard McEntee Paul Runge Vernon MacNabb FCC allocation five RC channels 72 MHz band wasnt easily won Among opposition faced fear RC modeler interference part several industrial companies used such RC-controlled equipment overhead cranes Courtney Lorenz persuaded companies probability interfer ence cranes RC plane signals less crane controls acci dentally shooting down RC model plane Time has borne out knowledge has never complaint indus try about RC plane interference After three years concentrated effort AMA Frequency Committee Courtneys law firm emerged Third Battle RC user rights five new 72 MHz frequencies narrow vic tory June 1966 FCC Commissioners Continued page 157 June 1989 45 4 FLASH -j 1st US RIC Flight School Stop Crashing Start Learning Dave Scott Most Experienced Instructor North America Over 3000 hrs flying time time profes sional instructor ue science instruction cannot imitated anywherel ything provided school ially designed Ulti mate Trainer ly 30000 air-miles flownl Original training handbook ning success rate ly vacation area/field prices food/accomodations ACT NOW CLASSES FILLING FASTInfo pack $200 1st US RIC FLIGHT SCHOOL 521 S Sawyer. Shawano WI 54166 17161524-2985 5 Yor 081 Add 0011 f No308-i/S Scale s595 No307 /7 Scale s6%5 U m15Tu ml iTe1 F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 40, 41, 42, 43, 44, 45, 157
Walt Good0 Battle RC Frequencies frequen cies enjoyed today RC fliers have evolved through ongoing series negotiations tween AMA FCC other terested parties since Forties report chroni cles some interplay Part 2 3 THE RC POPULATION grows19521958 Prior acquisition two license-free RC channels RC Nats held late 1940s averaged about 30 entries used Ham frequencies 50 MHz band required Ham operator li cense 1951 new 465 MHz RC gear available two compa nies Citizen-Ship Babcock Models Nats RC entries evenly split between Ham 50 MHz license-free 465 MHz frequencies new 27255 MHz RC channel au thorized FCC came use March 1952 years Nats fre quency usage distribution stood 50% us ing 50 MHz 30% using 465 MHz 20% flying 27 MHz See Table 1 1954 Nats 50% RC fliers us ing 27 MHz frequency 40% 50 MHz Ham channels 465 MHz usage dropped 10% trend confirmed Babcock sales figures three-year period mid-Fifties showed 27 MHz outpac ing 465 MHz units 10 Actual sales 10000 versus 1000 units Thus appears lower cost 27 MHz units both commercial homebuilt attracted bulk RCers Neverthe less 1950 1955 465 MHz units did provide first license-free system serve RC community As Table 1 clearly shows availability 465 MHz gear 1951 spurred rapid crossover 50 MHz frequency However 1958 less expensive home-built gear 27255 MHz taken strong lead 465 MHz usage receded 1958 Nats 40 Model Aviation FCC Docket 10086 published after three years negotiations between AMA FCC announced first home-built RC frequency established 27255 MHz ef fective March 24 1952 transmitter required crystal-controlled less 5 watts major advance no examination required FCC license FCC 529 Before 7J9D2BAI 0012 IXflCATIC2TS C013413S1011 Washington 05 D C i4atter ox Amendment o Part 19 Commissions Rules Regulatons Governing CitiscnsRadio Service 1CKET NO 10036 0 RD t session Fed-ral Communications Commission held its o&fices Washington N C th 13th February Commission having under consideration above captioned matter erovido use frequency 27255 Mc control objects devices radio Citizens 2adlo Service II rare old photograph depicts Bill left Walt right Good attending demonstration early RC equipment Henry Ford hat hand 1940 Ford Airport near Dearborne Ml Note transmitter powered car battery 400-volt dynemotor 30-watt output 72201 Glenview IL over 75% 280 RC en tries used 27 MHz 20% Ham gear scant percentage still 465 MHz availability license-free RC equip ment stimulated rapid growth RC air plane hobbybut certainly didnt eradicate its problems Interference 27255 MHz1958 As earlier test flights shown re gions country radio interference RC models 27255 MHz wasnt gen erally concern Beginning 1958 ever problem surfaced few specific areas key cause certain met ropolitan areas traffic control transmitters adopted same 27255 MHz frequency acquired RC use 1958 RC Nats Chicago po tential conflict severe enough call halt RC event during afternoon rush hour Chicago traffic signals being switched radio different flow mode ease homebound traffic after workand 200-watt traffic transmitter used same 27255 MHz frequency RC fliers Los Angeles Long land NY traffic systems also utilizing transmitters frequencywith Los Angeles earning epithet King Kong among local RCers AMA complained about inter ference FCC reminded us RC users 27255 MHz frequency must ac cept whatever garbage signals might assigned ISM band fre quency part Although AMA did re member caution scarcely antic ipated 200-watt transmitters city wide coverage would considered ap propriate use ISM band Several modelers shall remain name less known upon occasion ease homeward travel using RC transmitters own switching local traffic signals path Much relief radio-controlled traffic signal systems retired use within few years Some Los Angeles area fliers found switching RC gear other frequency released interference caused King Konga strata gem sometimes led bigger prob lems story goes mod eler flying near Los Angeles Sepul veda Basin another came asked could fly too Saying spe cial channel avoid King Kong air borne flier gave newcomer go-ahead second flier launched planeand crashed almost immediately followed short ly crash plane number As RCers learned too late both using 29 MHz frequency course illegal Sidestepping overloaded King Kong channel backfired case addition traffic control transmit ters other sources interfer ence RC ISM-band users Some radio-dispatched trucksbut fortunately fewwere using 27255 MHz channel time medical area di- channels1956-58 As ranks RCers athermy equipment used 27255 MHz increased did desire fly several frequency during patient treatment models same time same field course flying models well away hospitals solved problem typical 27255 MHz receiver period very broad receiving band al megahertz width receptive almost signal within band Char acteristic simple super-regenerative type circuit prevalent wideband receivers susceptible interference narrow-band types came later contrast crystalcontrolled RC transmitters period emitted very narrow band energy hence did cause problem others time Additional RC channels needed sat isfy goal same time avoid ing interference non-RC inhabi tants overloaded 27255 MHz chn nel AMA appealed FCC help resolve needs Second Battle RC frequencies launched status quo relatively undis turbed however until 1956 young communications attorney named Ed Ansell approached AMA volunteer ser vices free charge Having worked within FCC several years Ansell wanted bolster portfolio experience ad vance position private domain decided strategy forging out June 1989 41 Bill Good tuning receiver 1940 Nats Chicago Because inherent instability equipment era frequent tuning requiredsomething like other flight Second Battle additional RC clipping West Coast Model News dated February 16 1952 announced negotia tiona between AMA FCC finally paid off new RC frequency 27255 MHz POWER DIVE Little Planes Hit Bad Beep WALTER WINGO water tank nearby RUNt Virginia sends out beep 1 sep rad signals inutes Acad entv Model Aeronautics says its reason alarming increase model plane crashes re cently Vlat bothers Academy ilioUt ldnk radiowhich notifies its owners waler levelis variety oilier radios arc device hand same M frequency assigned radio-conrolled model planes Sunday doing lilt te lilglm-allitude flying noctl II uooiivni r~of Wheaton said Dr Wallet A nnd l3cthesda golden hysicist chairman ASIAs radio-controlled 5 visury coiimniss' Washington Daily News February 19 1957 dIscussed Virginia water tank trans mitted beeping signai 15 minutes causing RC model controls maifunction al crashing plane Because both using same FCC-assigned frequency 27255 MHz incidents like occurring alarming regularity spurred AMA continuous negotiations FCC new frequencies less interference own link between FCC ap propriate client such AMA Ansell already cognizant some AMAs needs area Radio Con trol also aware FCC preparing docket Citizens Radio Ser vice low-power walkie-talkies 1956 Ansell began drafting AMA assis tance official petition five new RC channels 27 MHz band petition became part FCC Docket #11994 January23 1957 month later Washington Daily News generated little publicity about RC fliers problem story called Lit tle Planes Hit Bad Beep February 19 1957 news feature related RC plane almost shot down ra dio signal local water tank height water tank being measured electronic device sent radio signal distant office reg ular intervals Obviously calibration de vice assigned same 27255 MHz frequency RC modelers used yet another example electronic applica tions swept heavily saturated ISM band known uncompli mentary jargon day Garbage Band FCC established ground rules RC modelers beginning 27255 MHz frequency never exclusive prerogative no conveni ent scapegoats no extenuating alibis Clear ly though after five years RC use sit uation caught up us problems wtth interference worsened time seek additional RC channels RC fliers determination pointed up telling quote abovementioned Washington Daily News article Curtis Plummer head FCCs Safety Special Radio Services declared AMA bunch getting very vocal ago got about 2000 letters telling flight disasters bemoah ing fact can fly plane time contests fact FCC port form re ply handle deluge protest letters RC modelers modelers took part effort owed belated thank-you Due part support September 11 1958 FCC isstted five new RC channels 27 MHz cam paign worked five 27 MHz RC channels spaced 50 kHz sandwiched among 22 Citi zens Band CB channels low-powered two-way voice comnmnication sets spaced 10 kHz shown Table 2 newly established close frequency spacing required narrow-band receiver ca pable selecting specific RC channel desired rather bringing several RC CB channels once Clearly old wideband super-regenerative receiver dropped crystal-controlled superheterodyne receiver answered new requirements narrow-band receiver neces sary precision allowed capture single desired RC channel re ject rest fortunate parallel develop ment then-new transistor would soon replacing vacuum tube yielding smaller better receiver before acquisition five new RC chan nels freed modelers conduct RC Pylon Sailplane competitions up five models simultaneous flight also opened 42 Model Aviation U Model Airplane News January 1959 carrIed report Doris Ed yuike FCCs grant ing five new RC frequencies 27 MHz band new frequencies awarded September 1958 AMA negotiated FCC four years obtain Finaily possible average modeiers fly several RC planes same time way multiple plane fun-flying local club field As sidelight assigning RC CB us ers chunk 27 MHz band FCC obliged take same portion 11-meter Ham band RC mod elers felt grateful Ham operators latter furious time Six years after assignment first RC channel 27255 MHz Second Battle RC channels time being reached satisfying resolution Strange Invitation FCC 1958 before five new channels 27 MHz band activated late 1958 FCC issued invitation AMA participate formers review frequencies between 27 MHz 900 MHz purpose forecast needs various potential users frequen cies seemed strange indeed consider ing additional future RC channels fore five new channels acti vated underlying reason learned FCC wanted draw up future frequency plans encompassing various user groups information would pre sented US Delegation Ge neva convention discussion other participating countries goal make new worldwide frequency assign ments cooperative basis As wed al ready noted countries adopted RC band 27 MHz several using 465 MHz band well AMA accepted invitation opportunity present overall RC fre quency story FCC Commissioners staff review took place mid-1959 helped set stage future re quests additional RC channels needed retrospect ap pears eyes FCC stature AMA increasing icquisition five new 27 MHz band RC channels September 1958 could have timely both RC club fliers large-scale competitions Just two months before new channels activated 1958 Nats RC event Chicago swamped 215 RC entries single 27255 MHz channel large number partly due branch ing RC event five categories three Pattern contestsRudder Intermedi ate Multiplus Scale Pylon So well represented Pattern events competition stretched out four days qualifying flights two days finals During early phase-in 27 MHz frequencies 50 kHz spacing seemed quite compatible new crystalcontrolled transmitters narrow-band superheterodyne receivers came market 1958 1959 Nearly half receivers 1960 Nats superhetero dyne ones Although home-builts still permitted five new channels es Continued page 44 FEDERAL CONMUNICATIONS COMMISS ION Washington 25 D C August 26 1959 77543 VIOLATIONS CF THE CITIZENS RADIO SERVICE RULES Commission sionitoring stations continuing detect violations Citizens Radio Service Rules issuing large numbers citations licensees volntions cited fajl mainly tuc large groups uency operation ths use Ciiizns Radio Service stations communications vhioh permissible undor Rules FCC Bulletin #77548 dated August 26 1959 stated some CSers using illegal high power non-CS channels citations issued violators Trans iation Some CBers causing probiems high-powered gear new RC channels Jamming Thwarts Model Fliers CY CHARLES REm WASHINOTONTha plan clinthed mt sleep atall faiteced p102nd tailspin arasbod Earth d watched Tragedy Nttonsrely ant brennan wan radinaontrnlled motlol Bun primary ennan saab accident ha snetlel aleplarn fans boiling mad sod deeply invalved tha Pedoral Cotnnooi nations Cotaminsion Tha problem thn radIo freqoenay sipted toe model airplann pilot nbsrad albert different radio obleativot An remIt 0 man panbieg twitch operate Ills note malta garage door cutting hi Iwo-way car radio way interrupt radio beam model plane mod eat control AS PUT BY DR WALl KR Good Botba da Md. o eltokeuman fee lb Aandeosy Model Aeronautic Thia yen renaider amen models urn very complicated have 5foea wieg span coat up 55110 morn h 1- Ucwwnnco*aat ononeoc eta l 1 ]TI ug baa sad An excerpt Chicago Daily News March 27 1965 entitled Jamming Thwarts Model Fliers After six years new frequencies CS population increased millions interference adjacent RC spots become intolerable model fliers Again AMA appealed FCC better channels aptly depicted papers cartoon Five new frequencies 72 MHz band authorized May 1966 mentioned clip ping American Modeler September/October 1966 expected greatly reduce interference problems RC planes new RC gear required have FCC typeacceptance home-built units werent permitted restriction considered seri ous few remaining home-builders commercial units quickly made available June 1989 43 New Spectrum Home RC Modelers JEREMIAH COURTNEY Climaxing years work Academy Model Aeronautics FCC approved five new frequencies will enormously redice eliminate interference As anything new questions answered Heres rundown.. inua wlI 101 uu Ii zuvxi BALSA SHUTS 36 48 1 162 33 3322 40 18 243 316249 14 2 58 1323 37 120337 1 163 374831 33234458 37 18 3 5471 45 3163-628255 143 7385 61 5163 85110 38 3 89124 71 12 3110155 34 3165181 I164 58.7648 3324 709458 16 4 8010668 3164 5312275 4 411013484 3/8 4165225129 2 4225261 MATCHED SHEETS 43 3324100 154108 3164120 144131 3D BALM STICKS 3646 1161409 1163810 1161214 3321410 3323812 3321216 191608 18141116 18381218 19121624 3163161116 316381720 316122230 14141624 14361926 14122130 14343444 1414055 5165162128 38382737 38123246 36344256 3815270 12123653 1 2344662 1215978 5/85/84865 34346790 1~414 w BALM TREANGLES 36 1/41425 3183830 1/211235 34 34 45 155 BALSA PLANKS 36 1195 12150 13200 14 280 1123 215 11124360 22225 23 325 24435 343495 34686 TAPERED SHEETS36 1142 65 143 85 38o268 3183 98 123120 CUSTOM CUT CONTEST BALSA Sheets Piecee Sanded Close Tolerances AAA Grade modeler dShippedlOO% areKiln Drie seriousand want performance must try 4-6 lb balsa LIGHT 4-6 LB WOOD36 1323 53 1203 53 1163 53 332363 1183 77 316388 143104 383122 123158 343242 13335 116483 3324100 164115 3164133 144156 384536 124322 ThAILING WOE 36 141 32 5161 14 39 381 12 46 112270 BASS WOOU 3/16311626 311611430 3/162/838 3/1611246 3163460 114 ,114 42 143849 1463480 3/83/660 31811270 31831490 1121/290 UNDLE DEALS. 20-1 11 84338889 2011l64361025 20-3/32 336865 15332436955 151/8336735 10-116436695 153/16336920 10316436835 10-114336655 101144369i30 10318336870 5-318436655 5-112336540 5-134361080 103/32446885 5-118448500 5-3116446600 5-14448645 - *NEW* Hundreds new sizes accessories and- finishing materials Send #10 SASE latest catalog 5P914ICEdTICKS 36 46 118 118 -1725 118 142026 18 382232 31163116 2838 114 1143450 114 3184955 1/4 1124585 3/8 3/8.4869 3/85 1/26077 112 1126688 1/253/47597 SPRUCE TRIANGLES 36 31831847 112112 - 64 31434 - 81 HA5D MAPLE 1436 31636 318 112 318 34 1234 BIRCH DOWELS 16 316 14 516 39 26 40 45 50 58 69 36 09 11 14 25 32 3PLYBIRCH45 16412620 13212445 1/1612455 1/812496 SPLYBINCH 3/3212 1/8412 3/16 12 1/4t12 3/8 12 1/212 48 5-99 625 626 625 725 900 RAI SA HOT L LONE STAR EPOXY -INSTANTOLUELIrE PL 548OROOVEDLO MOUNTS So L,--8 951 o Thck 296 5, 598los Th, 298 Ieha Call fBeS7454394 lOam bpmCeetrelTImelSr,n5662osThok5581/8561553/834/1/840 LONE30o/5982o Tho5501/812 -3153/83/4 5/33/40 _____________________1/462501/231413/16/45 14612495 STAR MODELS coma HandlIng Charge pay UPS Add $3 00 COD $300 extra PP APO FPO 1623 57th St Lubbock TX 79412 565. Weaccept Visa MasteiCard personal checks orCOD 661% tax InTexas US curmncyonly Minimum Wood Order *1000 9 V. V euo Clevis Remover Clevis Remover designed especipily sit uations davis located very tight spot within fuselage also removes arms off servos removes servo plug-ins Futaba radio receivers use simply insert Clevis Remover between servo arm end clevis tilt right towards thresd ad part davis tool hand-made engraved purchasers name price includes shipping handling Available direct Reynolds Jewelry 1707 Crter St. Vidalla LA 71373 318-3364606 - Its Stock f Immedt ShIpnsent ZENOAH G4237ca In828495 New Quadra 40 CDI 13-bea4og spring start 917595 Rae Quadra 46 614986 Briaghells flywheel 88 Rag Quadra 40 PswatAsaenbly Only points 96896 OUADRAOZENOAH R6f%IR *18O0iplus parts Jim Mesas ERCOUPE PLANS 92388 FuLL-KIT *32896 Jim Mess TOMAHAWKPLANS 62385 PuILKIT 923989 Jim Meager J-2 KITTENPLAN592996 FULL-KIT *21896 510 KADET SENIOR KIT-68989 isass 62260 810 KADET SENIORITA KIT93889 says 81688i ZENOAH 0-23 86ZENOAH G-38 85 FLOATS 48% 1/4 scale ss2l89 ssmpleta hit 94789 18 WWl WHEELS 8P/K Spring Starter 92496 PLANS SUPER STSARMAN 114 iGodlreyl $2896 1/3 TAYLORCRAIT 1/3 CUE NalIt 62885 MGA Paintad Pilot Busts 1/4 s.WW-I WW-2 CIV *1996 Servos H-482 424491289 World 818 forirge modals 94495 Prom sites ER TOP FLflt DYNATHRUST 28% OFF US Quadra FUELTAI6KSlBoz9796320 9896 FIEERGLASSARROWSHAPrS8/18s23lsog 84sr61195 24 No, Sarsiw 92 SOpostuas Bush Cheshorms JIM MESSERS QUALITY MODEL PRODUCTS VaUeyVIewDr Box 43ANgany NY 14706 tablished RC industry quick market acceptable designs encourage younger pilots minimum age dropped 18 12 years RC CB opera tion early transition 27 MHz fre quency smooth new RC channels worked well little iniding problems would develop sooner ex pected leading much earlier resump tion search different channels experienced almost no interference between adjacent RC channels spaced 50 kHz seeing occa sional glitches ii RC model flight caused interference CR walkie-talkies spaced 10 kHz short order began hear reports GB users illegally shifting crystals less crowded RC chan nels documented case interference caused severe injuries out-of control RC plane crashed spectator California instance CRer located near flying field committed two vi olations shifted CR frequency RC channel added 40-watt amplifier could play disc jockey other CRers Armed information RC club bad attempted several times before accident get CRer off RC chan nel FCC able prosecute CR vIolator - Increasing problems interference 1-960 mounting Citizen Band radio us- age hordes operators air brought ever increasing interference RC fliers CBers -were emulating Ham ra dio operators requisite skills legally licensed amateur radio operators stories heard CRers using illegal high-powered amplifiers large directional beam antennas make long-distance contact foreign countries FCC intended Citizen Radio Service used primarily local nec essary useful brief messagesthe le gal power limit five wattsnot continuous unrestricted entertainment con suming up 5000 watts power CBers indulging mod elers suffering repercussions Some five-watt CR station users dis covering five RC channelsand ille gally shifting crystals quiet oa ses avoid high-wattage peers During period recall watching screen spectrum -analyzer showed CR channels active spikes jump ing up down mainly proper fre quency locations five RC spots should have appeared comparatively like lulls several didnt Instead showed active voice modulation CR chan nels indicating illegal non-RC usage Another group CRers called Part 15 Gang exploited loophole Part 15 FCC Regulationsa rule permitting 100milliwatt transn-sission type section 27 MHz band used RC coterie targeted five RC chaqnels claiming appeared least WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITTI Satisfaction Guaranteed Direct Only 44 Model Aviation GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO 941 2B TEU 415 342 5581M/C VISA COD MON 6PM 10PM SAT & SUN SAM CAUFORNIA liME HATORI HEADERS PIPES MUFFLERS AND ACCESSORIES SO SIZE PIPE LONG O4AMU5 II I SCALE AND NW MUFFLERS SE ThROUGH FRAME ~L ThROUGH FRAME SL RIGHT SIDE MOUNTL AIMORA AlLANTA 1 used frequencies band Perhaps did survey nighttime RCers werent flying As result CB operators increas ingly invasive habits 27 MHz region becoming saturated nearly 15 mil lion walkie-talkie users few emitting illegal radiation affecting safe flight RC planes areas began realize though five 27 MHz RC channels active five years high time push acquisition new RC chan nels different band Third Battle1963-66 As specialist communications law FCC affilia tions Ed Ansell enormously speeded up 1958 acquisition 27 MHz chan nels Having moved California Ansell no longer available AMA sought attorney comparable merit assist negotiating desired new channels AMA soon found what looking Jerry Courtney former Assistant Gen eral Counsel FCC now private prac tice Courtney seeking clients needs outside giant broadcast industry Retained AMA 1963 Courtney quickly initiated action toward obtaining new RC frequencies 72 MHz perfect match AMA still advis es us daythough claims semiretired Turning voluminous RC files over Oz~zi L3I7 SHORT RADIUSMEDIUM RADIUS Courtney thought finally step ping aside quickly disabused notion counsel averred client case AMAmust always part ner attorney state clients needs critique attorneys proposed implementation request Ed Lo renz chairman AMA RC Committee acted committees contact Courtneyand greatly enjoyed experience Serving us com mittee Maynard Hill John Phelps Jack Port Howard McEntee Paul Runge Vernon MacNabb FCC allocation five RC channels 72 MHz band wasnt easily won Among opposition faced fear RC modeler interference part several industrial companies used such RC-controlled equipment overhead cranes Courtney Lorenz persuaded companies probability interfer ence cranes RC plane signals less crane controls acci dentally shooting down RC model plane Time has borne out knowledge has never complaint indus try about RC plane interference After three years concentrated effort AMA Frequency Committee Courtneys law firm emerged Third Battle RC user rights five new 72 MHz frequencies narrow vic tory June 1966 FCC Commissioners Continued page 157 June 1989 45 4 FLASH -j 1st US RIC Flight School Stop Crashing Start Learning Dave Scott Most Experienced Instructor North America Over 3000 hrs flying time time profes sional instructor ue science instruction cannot imitated anywherel ything provided school ially designed Ulti mate Trainer ly 30000 air-miles flownl Original training handbook ning success rate ly vacation area/field prices food/accomodations ACT NOW CLASSES FILLING FASTInfo pack $200 1st US RIC FLIGHT SCHOOL 521 S Sawyer. Shawano WI 54166 17161524-2985 5 Yor 081 Add 0011 f No308-i/S Scale s595 No307 /7 Scale s6%5 U m15Tu ml iTe1 F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 40, 41, 42, 43, 44, 45, 157
Walt Good0 Battle RC Frequencies frequen cies enjoyed today RC fliers have evolved through ongoing series negotiations tween AMA FCC other terested parties since Forties report chroni cles some interplay Part 2 3 THE RC POPULATION grows19521958 Prior acquisition two license-free RC channels RC Nats held late 1940s averaged about 30 entries used Ham frequencies 50 MHz band required Ham operator li cense 1951 new 465 MHz RC gear available two compa nies Citizen-Ship Babcock Models Nats RC entries evenly split between Ham 50 MHz license-free 465 MHz frequencies new 27255 MHz RC channel au thorized FCC came use March 1952 years Nats fre quency usage distribution stood 50% us ing 50 MHz 30% using 465 MHz 20% flying 27 MHz See Table 1 1954 Nats 50% RC fliers us ing 27 MHz frequency 40% 50 MHz Ham channels 465 MHz usage dropped 10% trend confirmed Babcock sales figures three-year period mid-Fifties showed 27 MHz outpac ing 465 MHz units 10 Actual sales 10000 versus 1000 units Thus appears lower cost 27 MHz units both commercial homebuilt attracted bulk RCers Neverthe less 1950 1955 465 MHz units did provide first license-free system serve RC community As Table 1 clearly shows availability 465 MHz gear 1951 spurred rapid crossover 50 MHz frequency However 1958 less expensive home-built gear 27255 MHz taken strong lead 465 MHz usage receded 1958 Nats 40 Model Aviation FCC Docket 10086 published after three years negotiations between AMA FCC announced first home-built RC frequency established 27255 MHz ef fective March 24 1952 transmitter required crystal-controlled less 5 watts major advance no examination required FCC license FCC 529 Before 7J9D2BAI 0012 IXflCATIC2TS C013413S1011 Washington 05 D C i4atter ox Amendment o Part 19 Commissions Rules Regulatons Governing CitiscnsRadio Service 1CKET NO 10036 0 RD t session Fed-ral Communications Commission held its o&fices Washington N C th 13th February Commission having under consideration above captioned matter erovido use frequency 27255 Mc control objects devices radio Citizens 2adlo Service II rare old photograph depicts Bill left Walt right Good attending demonstration early RC equipment Henry Ford hat hand 1940 Ford Airport near Dearborne Ml Note transmitter powered car battery 400-volt dynemotor 30-watt output 72201 Glenview IL over 75% 280 RC en tries used 27 MHz 20% Ham gear scant percentage still 465 MHz availability license-free RC equip ment stimulated rapid growth RC air plane hobbybut certainly didnt eradicate its problems Interference 27255 MHz1958 As earlier test flights shown re gions country radio interference RC models 27255 MHz wasnt gen erally concern Beginning 1958 ever problem surfaced few specific areas key cause certain met ropolitan areas traffic control transmitters adopted same 27255 MHz frequency acquired RC use 1958 RC Nats Chicago po tential conflict severe enough call halt RC event during afternoon rush hour Chicago traffic signals being switched radio different flow mode ease homebound traffic after workand 200-watt traffic transmitter used same 27255 MHz frequency RC fliers Los Angeles Long land NY traffic systems also utilizing transmitters frequencywith Los Angeles earning epithet King Kong among local RCers AMA complained about inter ference FCC reminded us RC users 27255 MHz frequency must ac cept whatever garbage signals might assigned ISM band fre quency part Although AMA did re member caution scarcely antic ipated 200-watt transmitters city wide coverage would considered ap propriate use ISM band Several modelers shall remain name less known upon occasion ease homeward travel using RC transmitters own switching local traffic signals path Much relief radio-controlled traffic signal systems retired use within few years Some Los Angeles area fliers found switching RC gear other frequency released interference caused King Konga strata gem sometimes led bigger prob lems story goes mod eler flying near Los Angeles Sepul veda Basin another came asked could fly too Saying spe cial channel avoid King Kong air borne flier gave newcomer go-ahead second flier launched planeand crashed almost immediately followed short ly crash plane number As RCers learned too late both using 29 MHz frequency course illegal Sidestepping overloaded King Kong channel backfired case addition traffic control transmit ters other sources interfer ence RC ISM-band users Some radio-dispatched trucksbut fortunately fewwere using 27255 MHz channel time medical area di- channels1956-58 As ranks RCers athermy equipment used 27255 MHz increased did desire fly several frequency during patient treatment models same time same field course flying models well away hospitals solved problem typical 27255 MHz receiver period very broad receiving band al megahertz width receptive almost signal within band Char acteristic simple super-regenerative type circuit prevalent wideband receivers susceptible interference narrow-band types came later contrast crystalcontrolled RC transmitters period emitted very narrow band energy hence did cause problem others time Additional RC channels needed sat isfy goal same time avoid ing interference non-RC inhabi tants overloaded 27255 MHz chn nel AMA appealed FCC help resolve needs Second Battle RC frequencies launched status quo relatively undis turbed however until 1956 young communications attorney named Ed Ansell approached AMA volunteer ser vices free charge Having worked within FCC several years Ansell wanted bolster portfolio experience ad vance position private domain decided strategy forging out June 1989 41 Bill Good tuning receiver 1940 Nats Chicago Because inherent instability equipment era frequent tuning requiredsomething like other flight Second Battle additional RC clipping West Coast Model News dated February 16 1952 announced negotia tiona between AMA FCC finally paid off new RC frequency 27255 MHz POWER DIVE Little Planes Hit Bad Beep WALTER WINGO water tank nearby RUNt Virginia sends out beep 1 sep rad signals inutes Acad entv Model Aeronautics says its reason alarming increase model plane crashes re cently Vlat bothers Academy ilioUt ldnk radiowhich notifies its owners waler levelis variety oilier radios arc device hand same M frequency assigned radio-conrolled model planes Sunday doing lilt te lilglm-allitude flying noctl II uooiivni r~of Wheaton said Dr Wallet A nnd l3cthesda golden hysicist chairman ASIAs radio-controlled 5 visury coiimniss' Washington Daily News February 19 1957 dIscussed Virginia water tank trans mitted beeping signai 15 minutes causing RC model controls maifunction al crashing plane Because both using same FCC-assigned frequency 27255 MHz incidents like occurring alarming regularity spurred AMA continuous negotiations FCC new frequencies less interference own link between FCC ap propriate client such AMA Ansell already cognizant some AMAs needs area Radio Con trol also aware FCC preparing docket Citizens Radio Ser vice low-power walkie-talkies 1956 Ansell began drafting AMA assis tance official petition five new RC channels 27 MHz band petition became part FCC Docket #11994 January23 1957 month later Washington Daily News generated little publicity about RC fliers problem story called Lit tle Planes Hit Bad Beep February 19 1957 news feature related RC plane almost shot down ra dio signal local water tank height water tank being measured electronic device sent radio signal distant office reg ular intervals Obviously calibration de vice assigned same 27255 MHz frequency RC modelers used yet another example electronic applica tions swept heavily saturated ISM band known uncompli mentary jargon day Garbage Band FCC established ground rules RC modelers beginning 27255 MHz frequency never exclusive prerogative no conveni ent scapegoats no extenuating alibis Clear ly though after five years RC use sit uation caught up us problems wtth interference worsened time seek additional RC channels RC fliers determination pointed up telling quote abovementioned Washington Daily News article Curtis Plummer head FCCs Safety Special Radio Services declared AMA bunch getting very vocal ago got about 2000 letters telling flight disasters bemoah ing fact can fly plane time contests fact FCC port form re ply handle deluge protest letters RC modelers modelers took part effort owed belated thank-you Due part support September 11 1958 FCC isstted five new RC channels 27 MHz cam paign worked five 27 MHz RC channels spaced 50 kHz sandwiched among 22 Citi zens Band CB channels low-powered two-way voice comnmnication sets spaced 10 kHz shown Table 2 newly established close frequency spacing required narrow-band receiver ca pable selecting specific RC channel desired rather bringing several RC CB channels once Clearly old wideband super-regenerative receiver dropped crystal-controlled superheterodyne receiver answered new requirements narrow-band receiver neces sary precision allowed capture single desired RC channel re ject rest fortunate parallel develop ment then-new transistor would soon replacing vacuum tube yielding smaller better receiver before acquisition five new RC chan nels freed modelers conduct RC Pylon Sailplane competitions up five models simultaneous flight also opened 42 Model Aviation U Model Airplane News January 1959 carrIed report Doris Ed yuike FCCs grant ing five new RC frequencies 27 MHz band new frequencies awarded September 1958 AMA negotiated FCC four years obtain Finaily possible average modeiers fly several RC planes same time way multiple plane fun-flying local club field As sidelight assigning RC CB us ers chunk 27 MHz band FCC obliged take same portion 11-meter Ham band RC mod elers felt grateful Ham operators latter furious time Six years after assignment first RC channel 27255 MHz Second Battle RC channels time being reached satisfying resolution Strange Invitation FCC 1958 before five new channels 27 MHz band activated late 1958 FCC issued invitation AMA participate formers review frequencies between 27 MHz 900 MHz purpose forecast needs various potential users frequen cies seemed strange indeed consider ing additional future RC channels fore five new channels acti vated underlying reason learned FCC wanted draw up future frequency plans encompassing various user groups information would pre sented US Delegation Ge neva convention discussion other participating countries goal make new worldwide frequency assign ments cooperative basis As wed al ready noted countries adopted RC band 27 MHz several using 465 MHz band well AMA accepted invitation opportunity present overall RC fre quency story FCC Commissioners staff review took place mid-1959 helped set stage future re quests additional RC channels needed retrospect ap pears eyes FCC stature AMA increasing icquisition five new 27 MHz band RC channels September 1958 could have timely both RC club fliers large-scale competitions Just two months before new channels activated 1958 Nats RC event Chicago swamped 215 RC entries single 27255 MHz channel large number partly due branch ing RC event five categories three Pattern contestsRudder Intermedi ate Multiplus Scale Pylon So well represented Pattern events competition stretched out four days qualifying flights two days finals During early phase-in 27 MHz frequencies 50 kHz spacing seemed quite compatible new crystalcontrolled transmitters narrow-band superheterodyne receivers came market 1958 1959 Nearly half receivers 1960 Nats superhetero dyne ones Although home-builts still permitted five new channels es Continued page 44 FEDERAL CONMUNICATIONS COMMISS ION Washington 25 D C August 26 1959 77543 VIOLATIONS CF THE CITIZENS RADIO SERVICE RULES Commission sionitoring stations continuing detect violations Citizens Radio Service Rules issuing large numbers citations licensees volntions cited fajl mainly tuc large groups uency operation ths use Ciiizns Radio Service stations communications vhioh permissible undor Rules FCC Bulletin #77548 dated August 26 1959 stated some CSers using illegal high power non-CS channels citations issued violators Trans iation Some CBers causing probiems high-powered gear new RC channels Jamming Thwarts Model Fliers CY CHARLES REm WASHINOTONTha plan clinthed mt sleep atall faiteced p102nd tailspin arasbod Earth d watched Tragedy Nttonsrely ant brennan wan radinaontrnlled motlol Bun primary ennan saab accident ha snetlel aleplarn fans boiling mad sod deeply invalved tha Pedoral Cotnnooi nations Cotaminsion Tha problem thn radIo freqoenay sipted toe model airplann pilot nbsrad albert different radio obleativot An remIt 0 man panbieg twitch operate Ills note malta garage door cutting hi Iwo-way car radio way interrupt radio beam model plane mod eat control AS PUT BY DR WALl KR Good Botba da Md. o eltokeuman fee lb Aandeosy Model Aeronautic Thia yen renaider amen models urn very complicated have 5foea wieg span coat up 55110 morn h 1- Ucwwnnco*aat ononeoc eta l 1 ]TI ug baa sad An excerpt Chicago Daily News March 27 1965 entitled Jamming Thwarts Model Fliers After six years new frequencies CS population increased millions interference adjacent RC spots become intolerable model fliers Again AMA appealed FCC better channels aptly depicted papers cartoon Five new frequencies 72 MHz band authorized May 1966 mentioned clip ping American Modeler September/October 1966 expected greatly reduce interference problems RC planes new RC gear required have FCC typeacceptance home-built units werent permitted restriction considered seri ous few remaining home-builders commercial units quickly made available June 1989 43 New Spectrum Home RC Modelers JEREMIAH COURTNEY Climaxing years work Academy Model Aeronautics FCC approved five new frequencies will enormously redice eliminate interference As anything new questions answered Heres rundown.. inua wlI 101 uu Ii zuvxi BALSA SHUTS 36 48 1 162 33 3322 40 18 243 316249 14 2 58 1323 37 120337 1 163 374831 33234458 37 18 3 5471 45 3163-628255 143 7385 61 5163 85110 38 3 89124 71 12 3110155 34 3165181 I164 58.7648 3324 709458 16 4 8010668 3164 5312275 4 411013484 3/8 4165225129 2 4225261 MATCHED SHEETS 43 3324100 154108 3164120 144131 3D BALM STICKS 3646 1161409 1163810 1161214 3321410 3323812 3321216 191608 18141116 18381218 19121624 3163161116 316381720 316122230 14141624 14361926 14122130 14343444 1414055 5165162128 38382737 38123246 36344256 3815270 12123653 1 2344662 1215978 5/85/84865 34346790 1~414 w BALM TREANGLES 36 1/41425 3183830 1/211235 34 34 45 155 BALSA PLANKS 36 1195 12150 13200 14 280 1123 215 11124360 22225 23 325 24435 343495 34686 TAPERED SHEETS36 1142 65 143 85 38o268 3183 98 123120 CUSTOM CUT CONTEST BALSA Sheets Piecee Sanded Close Tolerances AAA Grade modeler dShippedlOO% areKiln Drie seriousand want performance must try 4-6 lb balsa LIGHT 4-6 LB WOOD36 1323 53 1203 53 1163 53 332363 1183 77 316388 143104 383122 123158 343242 13335 116483 3324100 164115 3164133 144156 384536 124322 ThAILING WOE 36 141 32 5161 14 39 381 12 46 112270 BASS WOOU 3/16311626 311611430 3/162/838 3/1611246 3163460 114 ,114 42 143849 1463480 3/83/660 31811270 31831490 1121/290 UNDLE DEALS. 20-1 11 84338889 2011l64361025 20-3/32 336865 15332436955 151/8336735 10-116436695 153/16336920 10316436835 10-114336655 101144369i30 10318336870 5-318436655 5-112336540 5-134361080 103/32446885 5-118448500 5-3116446600 5-14448645 - *NEW* Hundreds new sizes accessories and- finishing materials Send #10 SASE latest catalog 5P914ICEdTICKS 36 46 118 118 -1725 118 142026 18 382232 31163116 2838 114 1143450 114 3184955 1/4 1124585 3/8 3/8.4869 3/85 1/26077 112 1126688 1/253/47597 SPRUCE TRIANGLES 36 31831847 112112 - 64 31434 - 81 HA5D MAPLE 1436 31636 318 112 318 34 1234 BIRCH DOWELS 16 316 14 516 39 26 40 45 50 58 69 36 09 11 14 25 32 3PLYBIRCH45 16412620 13212445 1/1612455 1/812496 SPLYBINCH 3/3212 1/8412 3/16 12 1/4t12 3/8 12 1/212 48 5-99 625 626 625 725 900 RAI SA HOT L LONE STAR EPOXY -INSTANTOLUELIrE PL 548OROOVEDLO MOUNTS So L,--8 951 o Thck 296 5, 598los Th, 298 Ieha Call fBeS7454394 lOam bpmCeetrelTImelSr,n5662osThok5581/8561553/834/1/840 LONE30o/5982o Tho5501/812 -3153/83/4 5/33/40 _____________________1/462501/231413/16/45 14612495 STAR MODELS coma HandlIng Charge pay UPS Add $3 00 COD $300 extra PP APO FPO 1623 57th St Lubbock TX 79412 565. Weaccept Visa MasteiCard personal checks orCOD 661% tax InTexas US curmncyonly Minimum Wood Order *1000 9 V. V euo Clevis Remover Clevis Remover designed especipily sit uations davis located very tight spot within fuselage also removes arms off servos removes servo plug-ins Futaba radio receivers use simply insert Clevis Remover between servo arm end clevis tilt right towards thresd ad part davis tool hand-made engraved purchasers name price includes shipping handling Available direct Reynolds Jewelry 1707 Crter St. Vidalla LA 71373 318-3364606 - Its Stock f Immedt ShIpnsent ZENOAH G4237ca In828495 New Quadra 40 CDI 13-bea4og spring start 917595 Rae Quadra 46 614986 Briaghells flywheel 88 Rag Quadra 40 PswatAsaenbly Only points 96896 OUADRAOZENOAH R6f%IR *18O0iplus parts Jim Mesas ERCOUPE PLANS 92388 FuLL-KIT *32896 Jim Mess TOMAHAWKPLANS 62385 PuILKIT 923989 Jim Meager J-2 KITTENPLAN592996 FULL-KIT *21896 510 KADET SENIOR KIT-68989 isass 62260 810 KADET SENIORITA KIT93889 says 81688i ZENOAH 0-23 86ZENOAH G-38 85 FLOATS 48% 1/4 scale ss2l89 ssmpleta hit 94789 18 WWl WHEELS 8P/K Spring Starter 92496 PLANS SUPER STSARMAN 114 iGodlreyl $2896 1/3 TAYLORCRAIT 1/3 CUE NalIt 62885 MGA Paintad Pilot Busts 1/4 s.WW-I WW-2 CIV *1996 Servos H-482 424491289 World 818 forirge modals 94495 Prom sites ER TOP FLflt DYNATHRUST 28% OFF US Quadra FUELTAI6KSlBoz9796320 9896 FIEERGLASSARROWSHAPrS8/18s23lsog 84sr61195 24 No, Sarsiw 92 SOpostuas Bush Cheshorms JIM MESSERS QUALITY MODEL PRODUCTS VaUeyVIewDr Box 43ANgany NY 14706 tablished RC industry quick market acceptable designs encourage younger pilots minimum age dropped 18 12 years RC CB opera tion early transition 27 MHz fre quency smooth new RC channels worked well little iniding problems would develop sooner ex pected leading much earlier resump tion search different channels experienced almost no interference between adjacent RC channels spaced 50 kHz seeing occa sional glitches ii RC model flight caused interference CR walkie-talkies spaced 10 kHz short order began hear reports GB users illegally shifting crystals less crowded RC chan nels documented case interference caused severe injuries out-of control RC plane crashed spectator California instance CRer located near flying field committed two vi olations shifted CR frequency RC channel added 40-watt amplifier could play disc jockey other CRers Armed information RC club bad attempted several times before accident get CRer off RC chan nel FCC able prosecute CR vIolator - Increasing problems interference 1-960 mounting Citizen Band radio us- age hordes operators air brought ever increasing interference RC fliers CBers -were emulating Ham ra dio operators requisite skills legally licensed amateur radio operators stories heard CRers using illegal high-powered amplifiers large directional beam antennas make long-distance contact foreign countries FCC intended Citizen Radio Service used primarily local nec essary useful brief messagesthe le gal power limit five wattsnot continuous unrestricted entertainment con suming up 5000 watts power CBers indulging mod elers suffering repercussions Some five-watt CR station users dis covering five RC channelsand ille gally shifting crystals quiet oa ses avoid high-wattage peers During period recall watching screen spectrum -analyzer showed CR channels active spikes jump ing up down mainly proper fre quency locations five RC spots should have appeared comparatively like lulls several didnt Instead showed active voice modulation CR chan nels indicating illegal non-RC usage Another group CRers called Part 15 Gang exploited loophole Part 15 FCC Regulationsa rule permitting 100milliwatt transn-sission type section 27 MHz band used RC coterie targeted five RC chaqnels claiming appeared least WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITTI Satisfaction Guaranteed Direct Only 44 Model Aviation GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO 941 2B TEU 415 342 5581M/C VISA COD MON 6PM 10PM SAT & SUN SAM CAUFORNIA liME HATORI HEADERS PIPES MUFFLERS AND ACCESSORIES SO SIZE PIPE LONG O4AMU5 II I SCALE AND NW MUFFLERS SE ThROUGH FRAME ~L ThROUGH FRAME SL RIGHT SIDE MOUNTL AIMORA AlLANTA 1 used frequencies band Perhaps did survey nighttime RCers werent flying As result CB operators increas ingly invasive habits 27 MHz region becoming saturated nearly 15 mil lion walkie-talkie users few emitting illegal radiation affecting safe flight RC planes areas began realize though five 27 MHz RC channels active five years high time push acquisition new RC chan nels different band Third Battle1963-66 As specialist communications law FCC affilia tions Ed Ansell enormously speeded up 1958 acquisition 27 MHz chan nels Having moved California Ansell no longer available AMA sought attorney comparable merit assist negotiating desired new channels AMA soon found what looking Jerry Courtney former Assistant Gen eral Counsel FCC now private prac tice Courtney seeking clients needs outside giant broadcast industry Retained AMA 1963 Courtney quickly initiated action toward obtaining new RC frequencies 72 MHz perfect match AMA still advis es us daythough claims semiretired Turning voluminous RC files over Oz~zi L3I7 SHORT RADIUSMEDIUM RADIUS Courtney thought finally step ping aside quickly disabused notion counsel averred client case AMAmust always part ner attorney state clients needs critique attorneys proposed implementation request Ed Lo renz chairman AMA RC Committee acted committees contact Courtneyand greatly enjoyed experience Serving us com mittee Maynard Hill John Phelps Jack Port Howard McEntee Paul Runge Vernon MacNabb FCC allocation five RC channels 72 MHz band wasnt easily won Among opposition faced fear RC modeler interference part several industrial companies used such RC-controlled equipment overhead cranes Courtney Lorenz persuaded companies probability interfer ence cranes RC plane signals less crane controls acci dentally shooting down RC model plane Time has borne out knowledge has never complaint indus try about RC plane interference After three years concentrated effort AMA Frequency Committee Courtneys law firm emerged Third Battle RC user rights five new 72 MHz frequencies narrow vic tory June 1966 FCC Commissioners Continued page 157 June 1989 45 4 FLASH -j 1st US RIC Flight School Stop Crashing Start Learning Dave Scott Most Experienced Instructor North America Over 3000 hrs flying time time profes sional instructor ue science instruction cannot imitated anywherel ything provided school ially designed Ulti mate Trainer ly 30000 air-miles flownl Original training handbook ning success rate ly vacation area/field prices food/accomodations ACT NOW CLASSES FILLING FASTInfo pack $200 1st US RIC FLIGHT SCHOOL 521 S Sawyer. Shawano WI 54166 17161524-2985 5 Yor 081 Add 0011 f No308-i/S Scale s595 No307 /7 Scale s6%5 U m15Tu ml iTe1 F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 40, 41, 42, 43, 44, 45, 157
Walt Good0 Battle RC Frequencies frequen cies enjoyed today RC fliers have evolved through ongoing series negotiations tween AMA FCC other terested parties since Forties report chroni cles some interplay Part 2 3 THE RC POPULATION grows19521958 Prior acquisition two license-free RC channels RC Nats held late 1940s averaged about 30 entries used Ham frequencies 50 MHz band required Ham operator li cense 1951 new 465 MHz RC gear available two compa nies Citizen-Ship Babcock Models Nats RC entries evenly split between Ham 50 MHz license-free 465 MHz frequencies new 27255 MHz RC channel au thorized FCC came use March 1952 years Nats fre quency usage distribution stood 50% us ing 50 MHz 30% using 465 MHz 20% flying 27 MHz See Table 1 1954 Nats 50% RC fliers us ing 27 MHz frequency 40% 50 MHz Ham channels 465 MHz usage dropped 10% trend confirmed Babcock sales figures three-year period mid-Fifties showed 27 MHz outpac ing 465 MHz units 10 Actual sales 10000 versus 1000 units Thus appears lower cost 27 MHz units both commercial homebuilt attracted bulk RCers Neverthe less 1950 1955 465 MHz units did provide first license-free system serve RC community As Table 1 clearly shows availability 465 MHz gear 1951 spurred rapid crossover 50 MHz frequency However 1958 less expensive home-built gear 27255 MHz taken strong lead 465 MHz usage receded 1958 Nats 40 Model Aviation FCC Docket 10086 published after three years negotiations between AMA FCC announced first home-built RC frequency established 27255 MHz ef fective March 24 1952 transmitter required crystal-controlled less 5 watts major advance no examination required FCC license FCC 529 Before 7J9D2BAI 0012 IXflCATIC2TS C013413S1011 Washington 05 D C i4atter ox Amendment o Part 19 Commissions Rules Regulatons Governing CitiscnsRadio Service 1CKET NO 10036 0 RD t session Fed-ral Communications Commission held its o&fices Washington N C th 13th February Commission having under consideration above captioned matter erovido use frequency 27255 Mc control objects devices radio Citizens 2adlo Service II rare old photograph depicts Bill left Walt right Good attending demonstration early RC equipment Henry Ford hat hand 1940 Ford Airport near Dearborne Ml Note transmitter powered car battery 400-volt dynemotor 30-watt output 72201 Glenview IL over 75% 280 RC en tries used 27 MHz 20% Ham gear scant percentage still 465 MHz availability license-free RC equip ment stimulated rapid growth RC air plane hobbybut certainly didnt eradicate its problems Interference 27255 MHz1958 As earlier test flights shown re gions country radio interference RC models 27255 MHz wasnt gen erally concern Beginning 1958 ever problem surfaced few specific areas key cause certain met ropolitan areas traffic control transmitters adopted same 27255 MHz frequency acquired RC use 1958 RC Nats Chicago po tential conflict severe enough call halt RC event during afternoon rush hour Chicago traffic signals being switched radio different flow mode ease homebound traffic after workand 200-watt traffic transmitter used same 27255 MHz frequency RC fliers Los Angeles Long land NY traffic systems also utilizing transmitters frequencywith Los Angeles earning epithet King Kong among local RCers AMA complained about inter ference FCC reminded us RC users 27255 MHz frequency must ac cept whatever garbage signals might assigned ISM band fre quency part Although AMA did re member caution scarcely antic ipated 200-watt transmitters city wide coverage would considered ap propriate use ISM band Several modelers shall remain name less known upon occasion ease homeward travel using RC transmitters own switching local traffic signals path Much relief radio-controlled traffic signal systems retired use within few years Some Los Angeles area fliers found switching RC gear other frequency released interference caused King Konga strata gem sometimes led bigger prob lems story goes mod eler flying near Los Angeles Sepul veda Basin another came asked could fly too Saying spe cial channel avoid King Kong air borne flier gave newcomer go-ahead second flier launched planeand crashed almost immediately followed short ly crash plane number As RCers learned too late both using 29 MHz frequency course illegal Sidestepping overloaded King Kong channel backfired case addition traffic control transmit ters other sources interfer ence RC ISM-band users Some radio-dispatched trucksbut fortunately fewwere using 27255 MHz channel time medical area di- channels1956-58 As ranks RCers athermy equipment used 27255 MHz increased did desire fly several frequency during patient treatment models same time same field course flying models well away hospitals solved problem typical 27255 MHz receiver period very broad receiving band al megahertz width receptive almost signal within band Char acteristic simple super-regenerative type circuit prevalent wideband receivers susceptible interference narrow-band types came later contrast crystalcontrolled RC transmitters period emitted very narrow band energy hence did cause problem others time Additional RC channels needed sat isfy goal same time avoid ing interference non-RC inhabi tants overloaded 27255 MHz chn nel AMA appealed FCC help resolve needs Second Battle RC frequencies launched status quo relatively undis turbed however until 1956 young communications attorney named Ed Ansell approached AMA volunteer ser vices free charge Having worked within FCC several years Ansell wanted bolster portfolio experience ad vance position private domain decided strategy forging out June 1989 41 Bill Good tuning receiver 1940 Nats Chicago Because inherent instability equipment era frequent tuning requiredsomething like other flight Second Battle additional RC clipping West Coast Model News dated February 16 1952 announced negotia tiona between AMA FCC finally paid off new RC frequency 27255 MHz POWER DIVE Little Planes Hit Bad Beep WALTER WINGO water tank nearby RUNt Virginia sends out beep 1 sep rad signals inutes Acad entv Model Aeronautics says its reason alarming increase model plane crashes re cently Vlat bothers Academy ilioUt ldnk radiowhich notifies its owners waler levelis variety oilier radios arc device hand same M frequency assigned radio-conrolled model planes Sunday doing lilt te lilglm-allitude flying noctl II uooiivni r~of Wheaton said Dr Wallet A nnd l3cthesda golden hysicist chairman ASIAs radio-controlled 5 visury coiimniss' Washington Daily News February 19 1957 dIscussed Virginia water tank trans mitted beeping signai 15 minutes causing RC model controls maifunction al crashing plane Because both using same FCC-assigned frequency 27255 MHz incidents like occurring alarming regularity spurred AMA continuous negotiations FCC new frequencies less interference own link between FCC ap propriate client such AMA Ansell already cognizant some AMAs needs area Radio Con trol also aware FCC preparing docket Citizens Radio Ser vice low-power walkie-talkies 1956 Ansell began drafting AMA assis tance official petition five new RC channels 27 MHz band petition became part FCC Docket #11994 January23 1957 month later Washington Daily News generated little publicity about RC fliers problem story called Lit tle Planes Hit Bad Beep February 19 1957 news feature related RC plane almost shot down ra dio signal local water tank height water tank being measured electronic device sent radio signal distant office reg ular intervals Obviously calibration de vice assigned same 27255 MHz frequency RC modelers used yet another example electronic applica tions swept heavily saturated ISM band known uncompli mentary jargon day Garbage Band FCC established ground rules RC modelers beginning 27255 MHz frequency never exclusive prerogative no conveni ent scapegoats no extenuating alibis Clear ly though after five years RC use sit uation caught up us problems wtth interference worsened time seek additional RC channels RC fliers determination pointed up telling quote abovementioned Washington Daily News article Curtis Plummer head FCCs Safety Special Radio Services declared AMA bunch getting very vocal ago got about 2000 letters telling flight disasters bemoah ing fact can fly plane time contests fact FCC port form re ply handle deluge protest letters RC modelers modelers took part effort owed belated thank-you Due part support September 11 1958 FCC isstted five new RC channels 27 MHz cam paign worked five 27 MHz RC channels spaced 50 kHz sandwiched among 22 Citi zens Band CB channels low-powered two-way voice comnmnication sets spaced 10 kHz shown Table 2 newly established close frequency spacing required narrow-band receiver ca pable selecting specific RC channel desired rather bringing several RC CB channels once Clearly old wideband super-regenerative receiver dropped crystal-controlled superheterodyne receiver answered new requirements narrow-band receiver neces sary precision allowed capture single desired RC channel re ject rest fortunate parallel develop ment then-new transistor would soon replacing vacuum tube yielding smaller better receiver before acquisition five new RC chan nels freed modelers conduct RC Pylon Sailplane competitions up five models simultaneous flight also opened 42 Model Aviation U Model Airplane News January 1959 carrIed report Doris Ed yuike FCCs grant ing five new RC frequencies 27 MHz band new frequencies awarded September 1958 AMA negotiated FCC four years obtain Finaily possible average modeiers fly several RC planes same time way multiple plane fun-flying local club field As sidelight assigning RC CB us ers chunk 27 MHz band FCC obliged take same portion 11-meter Ham band RC mod elers felt grateful Ham operators latter furious time Six years after assignment first RC channel 27255 MHz Second Battle RC channels time being reached satisfying resolution Strange Invitation FCC 1958 before five new channels 27 MHz band activated late 1958 FCC issued invitation AMA participate formers review frequencies between 27 MHz 900 MHz purpose forecast needs various potential users frequen cies seemed strange indeed consider ing additional future RC channels fore five new channels acti vated underlying reason learned FCC wanted draw up future frequency plans encompassing various user groups information would pre sented US Delegation Ge neva convention discussion other participating countries goal make new worldwide frequency assign ments cooperative basis As wed al ready noted countries adopted RC band 27 MHz several using 465 MHz band well AMA accepted invitation opportunity present overall RC fre quency story FCC Commissioners staff review took place mid-1959 helped set stage future re quests additional RC channels needed retrospect ap pears eyes FCC stature AMA increasing icquisition five new 27 MHz band RC channels September 1958 could have timely both RC club fliers large-scale competitions Just two months before new channels activated 1958 Nats RC event Chicago swamped 215 RC entries single 27255 MHz channel large number partly due branch ing RC event five categories three Pattern contestsRudder Intermedi ate Multiplus Scale Pylon So well represented Pattern events competition stretched out four days qualifying flights two days finals During early phase-in 27 MHz frequencies 50 kHz spacing seemed quite compatible new crystalcontrolled transmitters narrow-band superheterodyne receivers came market 1958 1959 Nearly half receivers 1960 Nats superhetero dyne ones Although home-builts still permitted five new channels es Continued page 44 FEDERAL CONMUNICATIONS COMMISS ION Washington 25 D C August 26 1959 77543 VIOLATIONS CF THE CITIZENS RADIO SERVICE RULES Commission sionitoring stations continuing detect violations Citizens Radio Service Rules issuing large numbers citations licensees volntions cited fajl mainly tuc large groups uency operation ths use Ciiizns Radio Service stations communications vhioh permissible undor Rules FCC Bulletin #77548 dated August 26 1959 stated some CSers using illegal high power non-CS channels citations issued violators Trans iation Some CBers causing probiems high-powered gear new RC channels Jamming Thwarts Model Fliers CY CHARLES REm WASHINOTONTha plan clinthed mt sleep atall faiteced p102nd tailspin arasbod Earth d watched Tragedy Nttonsrely ant brennan wan radinaontrnlled motlol Bun primary ennan saab accident ha snetlel aleplarn fans boiling mad sod deeply invalved tha Pedoral Cotnnooi nations Cotaminsion Tha problem thn radIo freqoenay sipted toe model airplann pilot nbsrad albert different radio obleativot An remIt 0 man panbieg twitch operate Ills note malta garage door cutting hi Iwo-way car radio way interrupt radio beam model plane mod eat control AS PUT BY DR WALl KR Good Botba da Md. o eltokeuman fee lb Aandeosy Model Aeronautic Thia yen renaider amen models urn very complicated have 5foea wieg span coat up 55110 morn h 1- Ucwwnnco*aat ononeoc eta l 1 ]TI ug baa sad An excerpt Chicago Daily News March 27 1965 entitled Jamming Thwarts Model Fliers After six years new frequencies CS population increased millions interference adjacent RC spots become intolerable model fliers Again AMA appealed FCC better channels aptly depicted papers cartoon Five new frequencies 72 MHz band authorized May 1966 mentioned clip ping American Modeler September/October 1966 expected greatly reduce interference problems RC planes new RC gear required have FCC typeacceptance home-built units werent permitted restriction considered seri ous few remaining home-builders commercial units quickly made available June 1989 43 New Spectrum Home RC Modelers JEREMIAH COURTNEY Climaxing years work Academy Model Aeronautics FCC approved five new frequencies will enormously redice eliminate interference As anything new questions answered Heres rundown.. inua wlI 101 uu Ii zuvxi BALSA SHUTS 36 48 1 162 33 3322 40 18 243 316249 14 2 58 1323 37 120337 1 163 374831 33234458 37 18 3 5471 45 3163-628255 143 7385 61 5163 85110 38 3 89124 71 12 3110155 34 3165181 I164 58.7648 3324 709458 16 4 8010668 3164 5312275 4 411013484 3/8 4165225129 2 4225261 MATCHED SHEETS 43 3324100 154108 3164120 144131 3D BALM STICKS 3646 1161409 1163810 1161214 3321410 3323812 3321216 191608 18141116 18381218 19121624 3163161116 316381720 316122230 14141624 14361926 14122130 14343444 1414055 5165162128 38382737 38123246 36344256 3815270 12123653 1 2344662 1215978 5/85/84865 34346790 1~414 w BALM TREANGLES 36 1/41425 3183830 1/211235 34 34 45 155 BALSA PLANKS 36 1195 12150 13200 14 280 1123 215 11124360 22225 23 325 24435 343495 34686 TAPERED SHEETS36 1142 65 143 85 38o268 3183 98 123120 CUSTOM CUT CONTEST BALSA Sheets Piecee Sanded Close Tolerances AAA Grade modeler dShippedlOO% areKiln Drie seriousand want performance must try 4-6 lb balsa LIGHT 4-6 LB WOOD36 1323 53 1203 53 1163 53 332363 1183 77 316388 143104 383122 123158 343242 13335 116483 3324100 164115 3164133 144156 384536 124322 ThAILING WOE 36 141 32 5161 14 39 381 12 46 112270 BASS WOOU 3/16311626 311611430 3/162/838 3/1611246 3163460 114 ,114 42 143849 1463480 3/83/660 31811270 31831490 1121/290 UNDLE DEALS. 20-1 11 84338889 2011l64361025 20-3/32 336865 15332436955 151/8336735 10-116436695 153/16336920 10316436835 10-114336655 101144369i30 10318336870 5-318436655 5-112336540 5-134361080 103/32446885 5-118448500 5-3116446600 5-14448645 - *NEW* Hundreds new sizes accessories and- finishing materials Send #10 SASE latest catalog 5P914ICEdTICKS 36 46 118 118 -1725 118 142026 18 382232 31163116 2838 114 1143450 114 3184955 1/4 1124585 3/8 3/8.4869 3/85 1/26077 112 1126688 1/253/47597 SPRUCE TRIANGLES 36 31831847 112112 - 64 31434 - 81 HA5D MAPLE 1436 31636 318 112 318 34 1234 BIRCH DOWELS 16 316 14 516 39 26 40 45 50 58 69 36 09 11 14 25 32 3PLYBIRCH45 16412620 13212445 1/1612455 1/812496 SPLYBINCH 3/3212 1/8412 3/16 12 1/4t12 3/8 12 1/212 48 5-99 625 626 625 725 900 RAI SA HOT L LONE STAR EPOXY -INSTANTOLUELIrE PL 548OROOVEDLO MOUNTS So L,--8 951 o Thck 296 5, 598los Th, 298 Ieha Call fBeS7454394 lOam bpmCeetrelTImelSr,n5662osThok5581/8561553/834/1/840 LONE30o/5982o Tho5501/812 -3153/83/4 5/33/40 _____________________1/462501/231413/16/45 14612495 STAR MODELS coma HandlIng Charge pay UPS Add $3 00 COD $300 extra PP APO FPO 1623 57th St Lubbock TX 79412 565. Weaccept Visa MasteiCard personal checks orCOD 661% tax InTexas US curmncyonly Minimum Wood Order *1000 9 V. V euo Clevis Remover Clevis Remover designed especipily sit uations davis located very tight spot within fuselage also removes arms off servos removes servo plug-ins Futaba radio receivers use simply insert Clevis Remover between servo arm end clevis tilt right towards thresd ad part davis tool hand-made engraved purchasers name price includes shipping handling Available direct Reynolds Jewelry 1707 Crter St. Vidalla LA 71373 318-3364606 - Its Stock f Immedt ShIpnsent ZENOAH G4237ca In828495 New Quadra 40 CDI 13-bea4og spring start 917595 Rae Quadra 46 614986 Briaghells flywheel 88 Rag Quadra 40 PswatAsaenbly Only points 96896 OUADRAOZENOAH R6f%IR *18O0iplus parts Jim Mesas ERCOUPE PLANS 92388 FuLL-KIT *32896 Jim Mess TOMAHAWKPLANS 62385 PuILKIT 923989 Jim Meager J-2 KITTENPLAN592996 FULL-KIT *21896 510 KADET SENIOR KIT-68989 isass 62260 810 KADET SENIORITA KIT93889 says 81688i ZENOAH 0-23 86ZENOAH G-38 85 FLOATS 48% 1/4 scale ss2l89 ssmpleta hit 94789 18 WWl WHEELS 8P/K Spring Starter 92496 PLANS SUPER STSARMAN 114 iGodlreyl $2896 1/3 TAYLORCRAIT 1/3 CUE NalIt 62885 MGA Paintad Pilot Busts 1/4 s.WW-I WW-2 CIV *1996 Servos H-482 424491289 World 818 forirge modals 94495 Prom sites ER TOP FLflt DYNATHRUST 28% OFF US Quadra FUELTAI6KSlBoz9796320 9896 FIEERGLASSARROWSHAPrS8/18s23lsog 84sr61195 24 No, Sarsiw 92 SOpostuas Bush Cheshorms JIM MESSERS QUALITY MODEL PRODUCTS VaUeyVIewDr Box 43ANgany NY 14706 tablished RC industry quick market acceptable designs encourage younger pilots minimum age dropped 18 12 years RC CB opera tion early transition 27 MHz fre quency smooth new RC channels worked well little iniding problems would develop sooner ex pected leading much earlier resump tion search different channels experienced almost no interference between adjacent RC channels spaced 50 kHz seeing occa sional glitches ii RC model flight caused interference CR walkie-talkies spaced 10 kHz short order began hear reports GB users illegally shifting crystals less crowded RC chan nels documented case interference caused severe injuries out-of control RC plane crashed spectator California instance CRer located near flying field committed two vi olations shifted CR frequency RC channel added 40-watt amplifier could play disc jockey other CRers Armed information RC club bad attempted several times before accident get CRer off RC chan nel FCC able prosecute CR vIolator - Increasing problems interference 1-960 mounting Citizen Band radio us- age hordes operators air brought ever increasing interference RC fliers CBers -were emulating Ham ra dio operators requisite skills legally licensed amateur radio operators stories heard CRers using illegal high-powered amplifiers large directional beam antennas make long-distance contact foreign countries FCC intended Citizen Radio Service used primarily local nec essary useful brief messagesthe le gal power limit five wattsnot continuous unrestricted entertainment con suming up 5000 watts power CBers indulging mod elers suffering repercussions Some five-watt CR station users dis covering five RC channelsand ille gally shifting crystals quiet oa ses avoid high-wattage peers During period recall watching screen spectrum -analyzer showed CR channels active spikes jump ing up down mainly proper fre quency locations five RC spots should have appeared comparatively like lulls several didnt Instead showed active voice modulation CR chan nels indicating illegal non-RC usage Another group CRers called Part 15 Gang exploited loophole Part 15 FCC Regulationsa rule permitting 100milliwatt transn-sission type section 27 MHz band used RC coterie targeted five RC chaqnels claiming appeared least WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITTI Satisfaction Guaranteed Direct Only 44 Model Aviation GOLDEN GATE HOBBIES PO BOX 282005 SAN FRANCISCO 941 2B TEU 415 342 5581M/C VISA COD MON 6PM 10PM SAT & SUN SAM CAUFORNIA liME HATORI HEADERS PIPES MUFFLERS AND ACCESSORIES SO SIZE PIPE LONG O4AMU5 II I SCALE AND NW MUFFLERS SE ThROUGH FRAME ~L ThROUGH FRAME SL RIGHT SIDE MOUNTL AIMORA AlLANTA 1 used frequencies band Perhaps did survey nighttime RCers werent flying As result CB operators increas ingly invasive habits 27 MHz region becoming saturated nearly 15 mil lion walkie-talkie users few emitting illegal radiation affecting safe flight RC planes areas began realize though five 27 MHz RC channels active five years high time push acquisition new RC chan nels different band Third Battle1963-66 As specialist communications law FCC affilia tions Ed Ansell enormously speeded up 1958 acquisition 27 MHz chan nels Having moved California Ansell no longer available AMA sought attorney comparable merit assist negotiating desired new channels AMA soon found what looking Jerry Courtney former Assistant Gen eral Counsel FCC now private prac tice Courtney seeking clients needs outside giant broadcast industry Retained AMA 1963 Courtney quickly initiated action toward obtaining new RC frequencies 72 MHz perfect match AMA still advis es us daythough claims semiretired Turning voluminous RC files over Oz~zi L3I7 SHORT RADIUSMEDIUM RADIUS Courtney thought finally step ping aside quickly disabused notion counsel averred client case AMAmust always part ner attorney state clients needs critique attorneys proposed implementation request Ed Lo renz chairman AMA RC Committee acted committees contact Courtneyand greatly enjoyed experience Serving us com mittee Maynard Hill John Phelps Jack Port Howard McEntee Paul Runge Vernon MacNabb FCC allocation five RC channels 72 MHz band wasnt easily won Among opposition faced fear RC modeler interference part several industrial companies used such RC-controlled equipment overhead cranes Courtney Lorenz persuaded companies probability interfer ence cranes RC plane signals less crane controls acci dentally shooting down RC model plane Time has borne out knowledge has never complaint indus try about RC plane interference After three years concentrated effort AMA Frequency Committee Courtneys law firm emerged Third Battle RC user rights five new 72 MHz frequencies narrow vic tory June 1966 FCC Commissioners Continued page 157 June 1989 45 4 FLASH -j 1st US RIC Flight School Stop Crashing Start Learning Dave Scott Most Experienced Instructor North America Over 3000 hrs flying time time profes sional instructor ue science instruction cannot imitated anywherel ything provided school ially designed Ulti mate Trainer ly 30000 air-miles flownl Original training handbook ning success rate ly vacation area/field prices food/accomodations ACT NOW CLASSES FILLING FASTInfo pack $200 1st US RIC FLIGHT SCHOOL 521 S Sawyer. Shawano WI 54166 17161524-2985 5 Yor 081 Add 0011 f No308-i/S Scale s595 No307 /7 Scale s6%5 U m15Tu ml iTe1 F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157