-I V-USI NvLiuc lyrpa Before FEDERAL COMMUNICATIONS COMMISSION Washington DC20554 Matter Amendment Parts 2 2122818790 95 Commissions Rules provide additional spectrum between 72 76 MHz radio control model aircraft boats cars other similar devices G-3 FCC 82-145 31081 General Docket 82-181 RM-3248 MHz radio control channels available due interference fixed land mobile operations industrial users use spectrum land mobile services growing 4 In addition need find replace ment frequencies 26-27 MHz 72-76 MHz channels Academy states need some 20 25 additional channels support growth Radio Control Radio Service over next ten years 5 As additional radio control channels requested might found Aced eny suggests secondary use ten 72-76 MHz channels currently allocated low power 1 watt less land mobile operations Special Industrial Manufacturers Railroad Radio Services along eleven guard band channels separating Govern ment non-Government allocations tween 30 42 MHz Academy also asks spectrum might found 222224 MHz 450-460 MHz 900 MHz bands 6 A series meetings held during fall 1979 Note 1] between members Commissions Staff Petitioner representatives several manufacturers radio control equipment discuss spectrum requirements manufacturers felt cause wide separation between eleven guard band channels between 30 42 MHz channels would well suited radio control models Commissions staff pointed out 222224 MHz band allocated part Amateur Radio Service attempt re-allocate spectrum would encounter much resistance amateur communi ty staff also pointed out heavy usage being made 450 460 MHz band Thus channels might readily available respect spectrum 900 MHz Academy indicated long term solution might use spectrum 900 MHZ however considerable testing would required before formal request could made Note 2] Adopted April 11982 Released April 131982 Commission Introduction 1 On 17 November 1978 Commission received petition CRM-3248 Acad emy Model Aeronautics Inc Academy requesting Commission amend Parts 2 95 Commissions Rules pro vide additional spectrum radio control model airplanes boats cars Acad emy stated additional spectrum needed order cope anticipated expan sion model activities during next ten years compensate diminished use existing thirteen frequencies 2699 2726 MHz 720 760 MHz bands due interference caused other op erations bands 2 The Academy states its petition because spectrum congestion high power operation forty Citizens Band Radio Service frequencies between 2696 2741 MHz 26-27 MHz band six inter leaved channels band allo cated Radio Control Radio Service nearly useless radio control operations 3 Currently Academy notes other spectrum available Radio Control Radio Service seven channels 72-76 MHz band however use second ary operational fixed stations Indus trial Land Transportation Public Safety Services well low power land mobile stations Manufacturers Radio Service According Academy num ber cities eg Houston TX Tampa FL etc few seven 72-76 7 As result series meetings Petitioner indicated near term 10 20 years spectrum requirements could best served allocation additional spec trum 72-76 MHz band end Petitioner established Joint Academy-Indus try Committee study nability ex panded radio control operations inter laced odd 20 kHz channels 72-76 MHz band ie 72.01 7203 7205 MHz etc establish technical parameters workable 72-76 MHz assignment plan 11 September 1980 Academy submitted Commission findings recom mendations Joint Committee Report 72-76 MHz Radio Control Systems dated September 1980 later modified letter dated 15 July 1981 8 The Academy Report proposes implemen tation additional 72-76 MHz frequencies follows a Model aircraft fifty 8 kHz chan nels starting 72010 MHz proceeding 38 Model Aviation IN JANUARY delegation Academy Frequency Committee met seven Federal Communications Commissioners Wash ington DC offices session 20-minute illustrated presentation given Fred Marks emphasize urgent need granting additional frequencies 72-76 MHz band soon scheduled action FCCS agenda special effort well received Commissioners climax four years AMA rts in-person meetings created better un derstanding within FCCS decision-making team concerning model avia tion growing need immediate relief minimal number radio frequencies presently available FCC April 1 voted adopt long-awaited Notice Proposed Rule Making NPRM released April 13 1982 public com ment Hundreds copies printed within hours after receipt mailed 200 key personnel including AMA officers model press model indus try Wednesday April 14 largest mailing printed packaged over 2200 AMA Chartered Clubs action newsletter editors publication FCC required responses NPRM within 30 days entailed rapid compressed schedule events Individuals received copies part key communications link AMA membership requested discuss NPRM club members AMA requested comments forwarded quickly possible preferably AMA Frequency Committee via AMA HQ Washington DC committee meet again April 30 May 1 draft single AMA response NPRM conjunction special weekend session model industry re view meeting planned coordinate industry inputs effort develop single AMA response NPRM behalf AMA membership should substantially decrease time required FCC decision expected release some 80 new frequencies later year Printed below NPRMBob Aberle Chairman AMA Frequency Committee NOTICE OF PROPOSED RULE MAKIrSG sdRuIE 20 kHz through 72990 MHz b Terrestrial models twenty-three 8 kHz channels starting 75410 MHz proceeding 20 kHz through 75850 MHz c Phase out existing seven 72 76 MHz frequencies within five years d Permit type emission used 9 The current rules restrict type emis sion employed radio control stations amplitude modulation Academy feels operations 72-76 MHz band should restricted using amplitude modulation point out frequency phase modulation used other coun tries may prove beneficial permitted country Discussion 10 The Commissions licensing records indi cate has considerable growth Radio Control Service over last f ifteen years particularly last five years can seen TABLE 1 attached hereto growth trend tends support Acad emys contention need ad ditional spectrum support anticipated expansion model activities over next ten years 11 At present Radio Control Radio Ser vice licensees have access thirteen 8 kHz channels six 26-27 MHz band [Note 31 seven 72-76 MI-Iz band [Note 4] control models thirteen channels four [Note 5] restricted solely control model aircraft Academy claims because sheer number licensees high power opeations forty Citizens Band Radio Service channels 27 MHz six interleaved radio control channels nearly useless radio control operation particularly control model aircraft suburban urban areas 12 The Academy also claims areas signal level fixed stations operat ing 72-76 MHz band precludes use some 72-76 MHz radio control chan nels Because growth land mobile radio service 7276 MHz fixed operations associated Academy feels number radio con trol channels precluded use because interference facilities supporting land mobile operations will drastically increase un less some relief forthcoming Academy suggests form relief would expand radio controllers access 7276 MHz band 13 In United States band segments 720-730 MHz 754-760 MHz 7276 MHz band currently allocated primary basis non-Government Fixed Service [Note 6] 20 kHz channelling plan begins 7202 MHz proceeds 7298 MHz 7560 through 7598 MHz has estab lished following FCC radio services permitted access spectrum AlaskaPublic Fixed Service Aviation Service mestic Public Fixed Radio Service Domestic Land Mobile Radio Service Industrial Radio Services Land Transportation Radio Services Maritime Service Public Safety Radio Ser vices Maritime Service Public Safety Radio Services Non-Government footnote 49 NG49 permits low power 1 watt less non-Government mobile service use limited number same 72-76 MHz chan nels several Industrial Land Transportation Sub-Radio Services [Note 7] Additionally non-Government footnote 56 NG56 permits secondary basis low power 1 watt less mobile service use seven channels control models li censees Radio Control Radio Service [Note 8] operations band sub ject condition no interference caused reception signals television channels 4 5 14 The 72-76 MHz frequencies predomi nantly used licensees private Part 90 common carrier Parts 21 22 radio services control remote transmit ters operating 30-50 MHz 152-162 MHz 450470 MHz bands both services high growth rates Developments likely increase demand 72-76 MHz transmitter control links land mobile service Telephone-company-supplied wireline control circuits 72-76 MHz systems can replace have both increased cost declined availability metallic copper pairs traditionally used transmitter control circuits available number areas carrier digital fiber optical technology has come use wireline con trol circuits available prices have inincreased point cost 7276 MHz radio system matched relative ly short time savings leased telephone line charges trend common carrier paging service moreover multiple site simulcast operations Control simulcast transmitters requires precise matching amplitude phase audio signals supplied individual transmitters dif ficult best achieve using wire line con trol circuits due day-to-day variations frequency phase response circuit However control simulcast transmitters easily achieved radio circuits 15 The reallocation twenty 35-43 MHz channels common carrier paging Report Order FCC 81-296 adopted 30 June 1981 CC Docket 80-189 pro posed allocation up hundred twenty 900 MHz paging channels both common carrier private systems General Docket 80-183 Notice Proposed Rule Making FCC 80-231 adopted 24 April 1980 Supplemental Notice Proposed Rule Mak ing FCC 80-510 adopted 21 October 1980 can expected place greater de mand upon frequency resources 72-76 MHz band transmitter control purposes Thus additional channels will precluded use possibilities interference transmitter control operations 16 justifying its request additional spectrum control models Acad emy states experience has shown fifteen models operated simultaneously given location operator confustion becomes major problem fore safety purposes number models operation given location practically limited fifteen less Addition ally Academy states desirable have additional five channels testing models Thus given modelling area total number desired interference free channels would twenty 17 In areas fixed stations operating channels ie 7202 7204 7296 7298 MHz 7542 7544 7598 MHz mobile use adjacent chan nels ie 7201 7203 97 7299 MHz 75417543 .7597 7599MHz would also precluded because potential interference being caused models re ceiver fixed station size area involved dependent primarily upon fixed station transmitter power amount natural radio shielding between fixed transmitter models receiver Thus provide requested twenty inter ference free channels given location modeler would need access block significantly twenty channels 18 The Academy feels modelers permitted access fifty channels con trol airborne models between 720 730 MHz twenty-three channels between 7540 7586 MHz control ter restrial models will able obtain July 198239 BASICS OF THE NPRM Assuming acceptance AMA proposals FCC will 50 new RC frequencies model aircraft will no longer sharing frequency numbers industrial users due very high power close proximity RC field interferes us will plenty other frequencies move 2 All existing equipment usable five years implementation date 3 All existing equipment usable year six year eight im plementation date change crystals re-tuning 4 After eighth year receivers exist now will made obsolete 5 Transmitters exist now operate narrow enough bandwidth usable forever crystal tuning changes twenty interference free channels locations 19 The Academy proposal would make avail able additional seventy-three new channels control models however would useable given location Some would excluded due interference caused continued use over next several years existing seven 72-76 MHz radio control channels others would ex cluded due interference caused fixed stations television broadcast stations op erating TV channels 4 5 Additionally intermodulation IM products caused use intermediate frequency IF 455 kHz may preclude use spectrum tween 7200-7252 7586-7600 MHz until such time equipment manufacturers can develop receiving systems employ different IF frequency Note 91 20 The potential harmful interference ing caused mobile radio model control transmitters fixed land mobile control sta tions slight First 10 kHz separa tion between model transmitter frequency control station receiver frequency Second model control station has trans mitter output power about 05 watts utilizes single vertical radiator approxi mately quarter wavelength ground plane consisting transmitter box fixed land mobile control station commonly operates output power 50 100 watts employs directional antennas both receiving transmitting stations fixed stations thus operate power level excess 20 dB above used control models combined direc tional characteristics fixed station anten nas should reduce possibility interfer ence problems occurring 21 There also slight potential harmful interference being caused mobile radio model control transmitters television recep tion channels 4 66-72 MHz 5 76-82 MHz general television station trans mitter output power excess 1 kilo watt Therefore ratio between model transmitter signal television transmit ter signal over 30 dB date have no recorded cases interference tele vision reception caused radio control models seven channels currently used 72-76 MHz Proposal 22 The Academys request additional mo bile service spectrum use frequency phase modulation well amplitude modu lation control models does have merit Therefore Commission proposes amend its Rules make available band segments 720-73fl 754-76fl MHz permit both amplitude frequency phase modulation control models accordance proposed rule changes outlined Appendix Editor Copies Appendix NPRM available free MA HQ Please include pre-oddressed No 10 size business envelope postage affixed get immediate attention note outiside lower left corner en velope AMA HQ NPRM Appendix 23 In addition footnote NG49 sec 2106 we now also including mobile service allocation column 8 bands 72-73 754-76fl MHz reflect actual use frequency bands parallels fixed service allocation both coyered footnotes NG1 NG3 includ ed Table Footnote NG49 also being amended specifically reflect its current pri mary status 72-73 75A-760 MHz band action simply editorial nature Regulatory Flexibility Act 1980 Initial Analysis 24 Reason action proceeding response petition rule making request ing additional spectrum radio control models 25 The objectives Commission desires comments proposal provide ex panded access 72-76 MHz band radio control models 26 Legal basis action proposed fur therance Sections 4i 303r Communications Act 1934 amended permits Commission make such rules regulations inconsistent law may necessary execution its functions additional view public welfare 27 Descriptions potential impact num ber small entities affected Implementation proposed rules would provide spectrum relief licensees perceive no ad verse impact other licensees mainly individuals engaged radio con trol models present over 200000 valid licenses force could pos sibly increase radio control equipment sales well sales models using radio equipment 28 Recording record-keeping other com pliance requirements No additional require ments would imposed proposed rule changes adopted 29 Federal rules overlap duplicate conflict proposed rules None 30 Any significant alternatives minimizing impact small entities consistent stated objective None 31 In accordance requirements Regulatory Flexibility Act 1980 PL 96-354 19 September 1980 Section 603a Secretary directed transmit copy initial analysis Chief Counsel Advocacy Small Business Administra tion 32 Authority issuance Notice contained Sections 4i 303r Communications Act 1934 amended 47 USC 4i 303r Pursuant proced ures set out Section 1415 Commis sions Rules Regulations 47 CFR 1 A15 interested persons may file comments before May 13 1982 reply comments before May 28 1982 relevant timely comments will considered Commission before final action taken proceeding reaching its decision Commission may take account informa tion ideas contained com ments provided such information writing indicating nature source such information placed public file provided fact Commis sions reliance such information noted Report Order 33 In accordance provisions Sec tion 1419 Commissions Rules Regulations 47 CFR 1 A19 formal partici pants shall file original five 5 copies comments other materials Par ticipants wishing Commissioner have personal copy comments should file original eleven 11 copies Members general public wish express interest participating informally may submitting 1 copy com ments given same consideration regardless number copies submitted documents will available public spection during regular business hours Commissions Public Reference Room its headquarters located 1919 M Street NW Washington DC 34 For purposes non-restricted notice comment rulemaking proceeding mem bers public advised ex parte contacts permitted time Commission adopts notice proposed rule making until time public notice issued stating substantive disposition matter considered forthcoming meeting until final order disposing matter adopted Commission ever earlier general ex porte presenta tion written oral communication other formal written commentslplead ings formal oral arguments between person outside Commission Com missioner member Commissions staff addresses merits pro ceeding Any person submits written ex porte presentation must serve copy presentation Commissions Secre tary inclusion public file Any per son makes oral ex porte presentation addressing matters fully covered previously-filed written comments proceeding must prepare written summary presentation day oral pres entation written summary must served Commissions Secretary clusion public file copy Commission official receiving oral presen tation ex porte presentation described above must state its face Secretary has served must also state dock et number proceeding relates See generally Section 11231 Commis sions rules 47 CFR 11231 35 For further information concerning pro cedures follow respect rule Continued page 129 40 Model Aviation TABLE 1 Number Radio Control Radio Service licenses force year end figures YearNo Licenses 196630300 196735695 196831721 196932600 197037598 197139094 197239514 197337736 197436774 1975533251 197686916 19771569012 1978191577 1979214314 1980226364 1981219387 Notes 11n March 1975 license fee reduced $2000 $400 21n January 1977 license fee eliminated hpxE Vmph527CD X Eq 6 must know hp propeller absorbingthe effective poweroutput engine approximate efficiency propeller can attain indicated V latter will vary substantially P/D 16 x 4 being capable about 67% maximum 9 x 7 being able reach about 85% maximum CD will vary greatly depending type aircraft involved can low 0025 up probably high 007 5 heavy slow flying biplane flat cowl lots wing struts wires wire-spoked wheels etc S should easy determine point illustrate much detail information needed calculate flight speed accurately Obviously get close multiplying pitch x rpm x efficiency will accident painless type Eq 6 can however used accurately quantify effect changing parameters involved leaving others fixed will close example involving E Lets suppose observed 11 x 694 propeller flight P real good power plant tuming 15000 rpm time J would 08 x 063 0504 actual V would about 115 fps or784 mph Fig 1 can determine F would about 077 Recognizing propeller operating higher-than-optimum angle attack wish change propellers P pitch reduced d must increased preserve hp net effect J will also decrease about 045 Fig will no longer valid since pitch angle will reduced FCC NPRM Continued aqe 40 making proceeding contact Donald Draper Campbell FCC Office Science Tech nology Spectrum Planning Branch Washing ton DC 20554 telephone 202 653-81 77 Federal Communications Commission William J Tricario Secretary Note 1 26 October 17 November 12 De cember 1979 Note 2 end Academy applied experimental license Part 5 19 August 1980 file number 8272-ER-PL-8o operate four 900 MHz frequencies An experimen tal license KK2XFz issued 28 Janu ary 1981 Note 3 26995 27045 27095 27145 27195 27255 MHz latter frequen cy shared other services Note 4 7208 7216 7224 7232 7240 7296 7564 MHz Continued page 132 SERVO GARD SERVO GARD mon bone fhght battery peck voltage well radio signal received transmitter cod reneiver malfunction detected part system SERVO GARO reduces throttle automatically ample time before battery failure safely land model SPECIFICATIONS Size unit installed KPS-14 servo case easy installation Just plug throttle servo output Weight Approx 1 oz Sensitivity Accurate within 02 Volts Servo Pulse Unit shipped positive pulse systems negative pulse available upon request SERVO GARD comes complete pro-wired pigtails servo connectors choice installed specify connector type orderl SEE YOUR DEALER OR ORDER DIRECT DEALER INOUIRIES IN VI TED Price $3795 Postpaid ISpecify connector typo positive negative pulse orderingl ENDORSED BY THE SPIRIT OF AMERICA SHOW TEAM LIMA OHIO R F Enterprises 106 N Main St Arlington OH 45814 419 365-5360 July 1982 129 Equating Eq 4a Eq. 5 solving y new efficiency curve will somewhat givesleft curve Fig 1 E J will beGet install don t take off about080 andthenewVwillbewithout Ken Willard RCM 6x 7841013 x 784 slight further increase V would result reduced slip stream velocity Such small change would justified desire squeeze last drop performance Out power plant engine plus propeller close hoped points have made clearly Take propellers complicated exciting further hoped article will enable respond definite yes answer asked question title truly BIG PuTS S-2A want superb 135 scale biplane kit features easy-to-build Snap-Lock construction numbered die-cut hand-machined balsa hardwood parts vacuum-formed cowl wheel pants clear windscreen neces sary hardware color decals full-size plans photo building guide radio installation directions List Price$32995 E&R Price$21995 BELLANCA DECATHLON top quality kit Pilot has wingspan 96/3 1519 sq area 60 long Kit features numbered die-cut hand-machined parts pre-cut window 3-dimensional instrument panel fullsized plans photo building guide pre-formed cowl wheel pants plus much List Price$30495 E&R Price$22995 NEW Bellanca Decathlon 40 same /4-scale kit above smaller has wingspan 67/4 774 sq wing area designed fly 40- 60-size engine List Price$13995 E&R Price$10695 FUTABA 6-FP-6FN radio complete standard charger including ERR special heavy-duty /4-scale pack age includes 4 large servos produce 154 oz torque 1 standard S-26 servo use throttle control also include heavy-duty 1800 MAH battery pack List Price$46990 E&R Price$32999 R R 1 Box 10 ______ Edgeley ND 58433 701/493-2015~obbieS PRODUCTS Complete Line Exhaust Systems * Tuned Pipes * Muffled Tuned Pipes * Headers * Venturi Mufflers * Expansion Mufflers Helicopter Ball Mufflers ialized Exhaust Systems Unsurpassed Worh~ h Pqrformance Nate 5 7208 7224 7240 7564 MHz Nate 6 See sec 2106 Commissions Rules Nate 7 NG49 following frequencies may autharized low-power 1 watt input mobile operations radio services shown subject condition no inter ference caused reception television stations operating channels 4 5 Manufacturers Radio Service MHZMHzMHzMHZMHZ 7202 7210 7218 7226 7234 7204 7212 7220 7228 7236 7206 7214 7222 7230 7238 7208 7216 7224 7232 7240 Special Industrial Radio Service Manufacturers Radio Service Railroad Radio Service MHz MHz MHz MHZ MHZ 7244 7252 7260 7548 7556 724d 7256 7544 7552 7560 Nate 8 NG56 Th frequencies 7208 7216 7224 7232 7240 7296 7564 MHz may authorized low power 1-watt put mobile operations Personal Radio Services radio control models subject condition interference will caused remote control industrial equip ment operating same adjacent fre quencies reception television stations operating Channels 4 5 TV terference shall considered occur ever reception regularly used television signals Impaired destroyed regardless strength television signais distance television station Note 9 No doubt reason Academy has requested access band segment 7586-7600 MHZ Bell XP-77/Berliner Continued paoe 44 tough would switch materials probably would have quit spot late June design gross weight up pqfl performance ysrem TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN KAB SUPER POSY THINNER K&B SUPER POSY PRIMER K&9 SUPER FOXY PAINT K&B MIXING CUPS 3650 lb still within plans Arnolds formula high wing loading would mean such long takeoff run decided cut structure gross weight 3000 lb Already price tag up $700000 end sight January 1943 six airplanes supposed have delivered Bell told Air Corps serious complications arisen efforts build high-speed airplane wood aiming July delivery first airplanes others end year schedule almost year off cost project up S2 million Bell blamed slippage need sub contract wood construction companies werent already loaded work troopcarrying gliders major friction tween Bell its subcontractors matters quality inspection working drawings top off Ranger engine having cooling troubles May 1943 serious thought given dumping entire XP-77 project because Bell couldnt concentrate- enough effort company too busy its P-63 Kingcobra very secret P-59 Airacomet jet flown first time October 1942 Finally Air Corps decided cancel thing first two prototypes felt would useful obtainingvaluable flight data type plywood aircraft troubles came light Bell stopped inspecting production factory Goshen Indiana Veneer Co building wings Air Corps help Bell discovered Goshen built set test wings no flight wings November 1943 Vidal Research Corp built both 132 Model Aviation scale Pitts S2A Pilot Kit Scale Flight u-uzu GEARED PROP DRIVE Swing Big Prop Realistic RPM Its she2 Ooncs Piop $1950 eKII-107 Con Pee Wee 020o 020 ,II sog 7-4 0-4 prOp 4 roabstcJeibcerrt sc4e IligOl KRESS TECHNOLOGY INC 27 Mdi Road IEI 6 11PM Lloyd i-lan,, N V 11743 00 /Ditibot inqokie ore lenited ZONA SAWS The one wood handle good blade Razor #200 $210 Sabre * 400 -$185 Sa100-389 Replacement blades available yosr dealer ModeS SupplyPO Box 3957 A 90510 uSA
Edition: Model Aviation - 1982/07
Page Numbers: 38, 39, 40, 129, 132
-I V-USI NvLiuc lyrpa Before FEDERAL COMMUNICATIONS COMMISSION Washington DC20554 Matter Amendment Parts 2 2122818790 95 Commissions Rules provide additional spectrum between 72 76 MHz radio control model aircraft boats cars other similar devices G-3 FCC 82-145 31081 General Docket 82-181 RM-3248 MHz radio control channels available due interference fixed land mobile operations industrial users use spectrum land mobile services growing 4 In addition need find replace ment frequencies 26-27 MHz 72-76 MHz channels Academy states need some 20 25 additional channels support growth Radio Control Radio Service over next ten years 5 As additional radio control channels requested might found Aced eny suggests secondary use ten 72-76 MHz channels currently allocated low power 1 watt less land mobile operations Special Industrial Manufacturers Railroad Radio Services along eleven guard band channels separating Govern ment non-Government allocations tween 30 42 MHz Academy also asks spectrum might found 222224 MHz 450-460 MHz 900 MHz bands 6 A series meetings held during fall 1979 Note 1] between members Commissions Staff Petitioner representatives several manufacturers radio control equipment discuss spectrum requirements manufacturers felt cause wide separation between eleven guard band channels between 30 42 MHz channels would well suited radio control models Commissions staff pointed out 222224 MHz band allocated part Amateur Radio Service attempt re-allocate spectrum would encounter much resistance amateur communi ty staff also pointed out heavy usage being made 450 460 MHz band Thus channels might readily available respect spectrum 900 MHz Academy indicated long term solution might use spectrum 900 MHZ however considerable testing would required before formal request could made Note 2] Adopted April 11982 Released April 131982 Commission Introduction 1 On 17 November 1978 Commission received petition CRM-3248 Acad emy Model Aeronautics Inc Academy requesting Commission amend Parts 2 95 Commissions Rules pro vide additional spectrum radio control model airplanes boats cars Acad emy stated additional spectrum needed order cope anticipated expan sion model activities during next ten years compensate diminished use existing thirteen frequencies 2699 2726 MHz 720 760 MHz bands due interference caused other op erations bands 2 The Academy states its petition because spectrum congestion high power operation forty Citizens Band Radio Service frequencies between 2696 2741 MHz 26-27 MHz band six inter leaved channels band allo cated Radio Control Radio Service nearly useless radio control operations 3 Currently Academy notes other spectrum available Radio Control Radio Service seven channels 72-76 MHz band however use second ary operational fixed stations Indus trial Land Transportation Public Safety Services well low power land mobile stations Manufacturers Radio Service According Academy num ber cities eg Houston TX Tampa FL etc few seven 72-76 7 As result series meetings Petitioner indicated near term 10 20 years spectrum requirements could best served allocation additional spec trum 72-76 MHz band end Petitioner established Joint Academy-Indus try Committee study nability ex panded radio control operations inter laced odd 20 kHz channels 72-76 MHz band ie 72.01 7203 7205 MHz etc establish technical parameters workable 72-76 MHz assignment plan 11 September 1980 Academy submitted Commission findings recom mendations Joint Committee Report 72-76 MHz Radio Control Systems dated September 1980 later modified letter dated 15 July 1981 8 The Academy Report proposes implemen tation additional 72-76 MHz frequencies follows a Model aircraft fifty 8 kHz chan nels starting 72010 MHz proceeding 38 Model Aviation IN JANUARY delegation Academy Frequency Committee met seven Federal Communications Commissioners Wash ington DC offices session 20-minute illustrated presentation given Fred Marks emphasize urgent need granting additional frequencies 72-76 MHz band soon scheduled action FCCS agenda special effort well received Commissioners climax four years AMA rts in-person meetings created better un derstanding within FCCS decision-making team concerning model avia tion growing need immediate relief minimal number radio frequencies presently available FCC April 1 voted adopt long-awaited Notice Proposed Rule Making NPRM released April 13 1982 public com ment Hundreds copies printed within hours after receipt mailed 200 key personnel including AMA officers model press model indus try Wednesday April 14 largest mailing printed packaged over 2200 AMA Chartered Clubs action newsletter editors publication FCC required responses NPRM within 30 days entailed rapid compressed schedule events Individuals received copies part key communications link AMA membership requested discuss NPRM club members AMA requested comments forwarded quickly possible preferably AMA Frequency Committee via AMA HQ Washington DC committee meet again April 30 May 1 draft single AMA response NPRM conjunction special weekend session model industry re view meeting planned coordinate industry inputs effort develop single AMA response NPRM behalf AMA membership should substantially decrease time required FCC decision expected release some 80 new frequencies later year Printed below NPRMBob Aberle Chairman AMA Frequency Committee NOTICE OF PROPOSED RULE MAKIrSG sdRuIE 20 kHz through 72990 MHz b Terrestrial models twenty-three 8 kHz channels starting 75410 MHz proceeding 20 kHz through 75850 MHz c Phase out existing seven 72 76 MHz frequencies within five years d Permit type emission used 9 The current rules restrict type emis sion employed radio control stations amplitude modulation Academy feels operations 72-76 MHz band should restricted using amplitude modulation point out frequency phase modulation used other coun tries may prove beneficial permitted country Discussion 10 The Commissions licensing records indi cate has considerable growth Radio Control Service over last f ifteen years particularly last five years can seen TABLE 1 attached hereto growth trend tends support Acad emys contention need ad ditional spectrum support anticipated expansion model activities over next ten years 11 At present Radio Control Radio Ser vice licensees have access thirteen 8 kHz channels six 26-27 MHz band [Note 31 seven 72-76 MI-Iz band [Note 4] control models thirteen channels four [Note 5] restricted solely control model aircraft Academy claims because sheer number licensees high power opeations forty Citizens Band Radio Service channels 27 MHz six interleaved radio control channels nearly useless radio control operation particularly control model aircraft suburban urban areas 12 The Academy also claims areas signal level fixed stations operat ing 72-76 MHz band precludes use some 72-76 MHz radio control chan nels Because growth land mobile radio service 7276 MHz fixed operations associated Academy feels number radio con trol channels precluded use because interference facilities supporting land mobile operations will drastically increase un less some relief forthcoming Academy suggests form relief would expand radio controllers access 7276 MHz band 13 In United States band segments 720-730 MHz 754-760 MHz 7276 MHz band currently allocated primary basis non-Government Fixed Service [Note 6] 20 kHz channelling plan begins 7202 MHz proceeds 7298 MHz 7560 through 7598 MHz has estab lished following FCC radio services permitted access spectrum AlaskaPublic Fixed Service Aviation Service mestic Public Fixed Radio Service Domestic Land Mobile Radio Service Industrial Radio Services Land Transportation Radio Services Maritime Service Public Safety Radio Ser vices Maritime Service Public Safety Radio Services Non-Government footnote 49 NG49 permits low power 1 watt less non-Government mobile service use limited number same 72-76 MHz chan nels several Industrial Land Transportation Sub-Radio Services [Note 7] Additionally non-Government footnote 56 NG56 permits secondary basis low power 1 watt less mobile service use seven channels control models li censees Radio Control Radio Service [Note 8] operations band sub ject condition no interference caused reception signals television channels 4 5 14 The 72-76 MHz frequencies predomi nantly used licensees private Part 90 common carrier Parts 21 22 radio services control remote transmit ters operating 30-50 MHz 152-162 MHz 450470 MHz bands both services high growth rates Developments likely increase demand 72-76 MHz transmitter control links land mobile service Telephone-company-supplied wireline control circuits 72-76 MHz systems can replace have both increased cost declined availability metallic copper pairs traditionally used transmitter control circuits available number areas carrier digital fiber optical technology has come use wireline con trol circuits available prices have inincreased point cost 7276 MHz radio system matched relative ly short time savings leased telephone line charges trend common carrier paging service moreover multiple site simulcast operations Control simulcast transmitters requires precise matching amplitude phase audio signals supplied individual transmitters dif ficult best achieve using wire line con trol circuits due day-to-day variations frequency phase response circuit However control simulcast transmitters easily achieved radio circuits 15 The reallocation twenty 35-43 MHz channels common carrier paging Report Order FCC 81-296 adopted 30 June 1981 CC Docket 80-189 pro posed allocation up hundred twenty 900 MHz paging channels both common carrier private systems General Docket 80-183 Notice Proposed Rule Making FCC 80-231 adopted 24 April 1980 Supplemental Notice Proposed Rule Mak ing FCC 80-510 adopted 21 October 1980 can expected place greater de mand upon frequency resources 72-76 MHz band transmitter control purposes Thus additional channels will precluded use possibilities interference transmitter control operations 16 justifying its request additional spectrum control models Acad emy states experience has shown fifteen models operated simultaneously given location operator confustion becomes major problem fore safety purposes number models operation given location practically limited fifteen less Addition ally Academy states desirable have additional five channels testing models Thus given modelling area total number desired interference free channels would twenty 17 In areas fixed stations operating channels ie 7202 7204 7296 7298 MHz 7542 7544 7598 MHz mobile use adjacent chan nels ie 7201 7203 97 7299 MHz 75417543 .7597 7599MHz would also precluded because potential interference being caused models re ceiver fixed station size area involved dependent primarily upon fixed station transmitter power amount natural radio shielding between fixed transmitter models receiver Thus provide requested twenty inter ference free channels given location modeler would need access block significantly twenty channels 18 The Academy feels modelers permitted access fifty channels con trol airborne models between 720 730 MHz twenty-three channels between 7540 7586 MHz control ter restrial models will able obtain July 198239 BASICS OF THE NPRM Assuming acceptance AMA proposals FCC will 50 new RC frequencies model aircraft will no longer sharing frequency numbers industrial users due very high power close proximity RC field interferes us will plenty other frequencies move 2 All existing equipment usable five years implementation date 3 All existing equipment usable year six year eight im plementation date change crystals re-tuning 4 After eighth year receivers exist now will made obsolete 5 Transmitters exist now operate narrow enough bandwidth usable forever crystal tuning changes twenty interference free channels locations 19 The Academy proposal would make avail able additional seventy-three new channels control models however would useable given location Some would excluded due interference caused continued use over next several years existing seven 72-76 MHz radio control channels others would ex cluded due interference caused fixed stations television broadcast stations op erating TV channels 4 5 Additionally intermodulation IM products caused use intermediate frequency IF 455 kHz may preclude use spectrum tween 7200-7252 7586-7600 MHz until such time equipment manufacturers can develop receiving systems employ different IF frequency Note 91 20 The potential harmful interference ing caused mobile radio model control transmitters fixed land mobile control sta tions slight First 10 kHz separa tion between model transmitter frequency control station receiver frequency Second model control station has trans mitter output power about 05 watts utilizes single vertical radiator approxi mately quarter wavelength ground plane consisting transmitter box fixed land mobile control station commonly operates output power 50 100 watts employs directional antennas both receiving transmitting stations fixed stations thus operate power level excess 20 dB above used control models combined direc tional characteristics fixed station anten nas should reduce possibility interfer ence problems occurring 21 There also slight potential harmful interference being caused mobile radio model control transmitters television recep tion channels 4 66-72 MHz 5 76-82 MHz general television station trans mitter output power excess 1 kilo watt Therefore ratio between model transmitter signal television transmit ter signal over 30 dB date have no recorded cases interference tele vision reception caused radio control models seven channels currently used 72-76 MHz Proposal 22 The Academys request additional mo bile service spectrum use frequency phase modulation well amplitude modu lation control models does have merit Therefore Commission proposes amend its Rules make available band segments 720-73fl 754-76fl MHz permit both amplitude frequency phase modulation control models accordance proposed rule changes outlined Appendix Editor Copies Appendix NPRM available free MA HQ Please include pre-oddressed No 10 size business envelope postage affixed get immediate attention note outiside lower left corner en velope AMA HQ NPRM Appendix 23 In addition footnote NG49 sec 2106 we now also including mobile service allocation column 8 bands 72-73 754-76fl MHz reflect actual use frequency bands parallels fixed service allocation both coyered footnotes NG1 NG3 includ ed Table Footnote NG49 also being amended specifically reflect its current pri mary status 72-73 75A-760 MHz band action simply editorial nature Regulatory Flexibility Act 1980 Initial Analysis 24 Reason action proceeding response petition rule making request ing additional spectrum radio control models 25 The objectives Commission desires comments proposal provide ex panded access 72-76 MHz band radio control models 26 Legal basis action proposed fur therance Sections 4i 303r Communications Act 1934 amended permits Commission make such rules regulations inconsistent law may necessary execution its functions additional view public welfare 27 Descriptions potential impact num ber small entities affected Implementation proposed rules would provide spectrum relief licensees perceive no ad verse impact other licensees mainly individuals engaged radio con trol models present over 200000 valid licenses force could pos sibly increase radio control equipment sales well sales models using radio equipment 28 Recording record-keeping other com pliance requirements No additional require ments would imposed proposed rule changes adopted 29 Federal rules overlap duplicate conflict proposed rules None 30 Any significant alternatives minimizing impact small entities consistent stated objective None 31 In accordance requirements Regulatory Flexibility Act 1980 PL 96-354 19 September 1980 Section 603a Secretary directed transmit copy initial analysis Chief Counsel Advocacy Small Business Administra tion 32 Authority issuance Notice contained Sections 4i 303r Communications Act 1934 amended 47 USC 4i 303r Pursuant proced ures set out Section 1415 Commis sions Rules Regulations 47 CFR 1 A15 interested persons may file comments before May 13 1982 reply comments before May 28 1982 relevant timely comments will considered Commission before final action taken proceeding reaching its decision Commission may take account informa tion ideas contained com ments provided such information writing indicating nature source such information placed public file provided fact Commis sions reliance such information noted Report Order 33 In accordance provisions Sec tion 1419 Commissions Rules Regulations 47 CFR 1 A19 formal partici pants shall file original five 5 copies comments other materials Par ticipants wishing Commissioner have personal copy comments should file original eleven 11 copies Members general public wish express interest participating informally may submitting 1 copy com ments given same consideration regardless number copies submitted documents will available public spection during regular business hours Commissions Public Reference Room its headquarters located 1919 M Street NW Washington DC 34 For purposes non-restricted notice comment rulemaking proceeding mem bers public advised ex parte contacts permitted time Commission adopts notice proposed rule making until time public notice issued stating substantive disposition matter considered forthcoming meeting until final order disposing matter adopted Commission ever earlier general ex porte presenta tion written oral communication other formal written commentslplead ings formal oral arguments between person outside Commission Com missioner member Commissions staff addresses merits pro ceeding Any person submits written ex porte presentation must serve copy presentation Commissions Secre tary inclusion public file Any per son makes oral ex porte presentation addressing matters fully covered previously-filed written comments proceeding must prepare written summary presentation day oral pres entation written summary must served Commissions Secretary clusion public file copy Commission official receiving oral presen tation ex porte presentation described above must state its face Secretary has served must also state dock et number proceeding relates See generally Section 11231 Commis sions rules 47 CFR 11231 35 For further information concerning pro cedures follow respect rule Continued page 129 40 Model Aviation TABLE 1 Number Radio Control Radio Service licenses force year end figures YearNo Licenses 196630300 196735695 196831721 196932600 197037598 197139094 197239514 197337736 197436774 1975533251 197686916 19771569012 1978191577 1979214314 1980226364 1981219387 Notes 11n March 1975 license fee reduced $2000 $400 21n January 1977 license fee eliminated hpxE Vmph527CD X Eq 6 must know hp propeller absorbingthe effective poweroutput engine approximate efficiency propeller can attain indicated V latter will vary substantially P/D 16 x 4 being capable about 67% maximum 9 x 7 being able reach about 85% maximum CD will vary greatly depending type aircraft involved can low 0025 up probably high 007 5 heavy slow flying biplane flat cowl lots wing struts wires wire-spoked wheels etc S should easy determine point illustrate much detail information needed calculate flight speed accurately Obviously get close multiplying pitch x rpm x efficiency will accident painless type Eq 6 can however used accurately quantify effect changing parameters involved leaving others fixed will close example involving E Lets suppose observed 11 x 694 propeller flight P real good power plant tuming 15000 rpm time J would 08 x 063 0504 actual V would about 115 fps or784 mph Fig 1 can determine F would about 077 Recognizing propeller operating higher-than-optimum angle attack wish change propellers P pitch reduced d must increased preserve hp net effect J will also decrease about 045 Fig will no longer valid since pitch angle will reduced FCC NPRM Continued aqe 40 making proceeding contact Donald Draper Campbell FCC Office Science Tech nology Spectrum Planning Branch Washing ton DC 20554 telephone 202 653-81 77 Federal Communications Commission William J Tricario Secretary Note 1 26 October 17 November 12 De cember 1979 Note 2 end Academy applied experimental license Part 5 19 August 1980 file number 8272-ER-PL-8o operate four 900 MHz frequencies An experimen tal license KK2XFz issued 28 Janu ary 1981 Note 3 26995 27045 27095 27145 27195 27255 MHz latter frequen cy shared other services Note 4 7208 7216 7224 7232 7240 7296 7564 MHz Continued page 132 SERVO GARD SERVO GARD mon bone fhght battery peck voltage well radio signal received transmitter cod reneiver malfunction detected part system SERVO GARO reduces throttle automatically ample time before battery failure safely land model SPECIFICATIONS Size unit installed KPS-14 servo case easy installation Just plug throttle servo output Weight Approx 1 oz Sensitivity Accurate within 02 Volts Servo Pulse Unit shipped positive pulse systems negative pulse available upon request SERVO GARD comes complete pro-wired pigtails servo connectors choice installed specify connector type orderl SEE YOUR DEALER OR ORDER DIRECT DEALER INOUIRIES IN VI TED Price $3795 Postpaid ISpecify connector typo positive negative pulse orderingl ENDORSED BY THE SPIRIT OF AMERICA SHOW TEAM LIMA OHIO R F Enterprises 106 N Main St Arlington OH 45814 419 365-5360 July 1982 129 Equating Eq 4a Eq. 5 solving y new efficiency curve will somewhat givesleft curve Fig 1 E J will beGet install don t take off about080 andthenewVwillbewithout Ken Willard RCM 6x 7841013 x 784 slight further increase V would result reduced slip stream velocity Such small change would justified desire squeeze last drop performance Out power plant engine plus propeller close hoped points have made clearly Take propellers complicated exciting further hoped article will enable respond definite yes answer asked question title truly BIG PuTS S-2A want superb 135 scale biplane kit features easy-to-build Snap-Lock construction numbered die-cut hand-machined balsa hardwood parts vacuum-formed cowl wheel pants clear windscreen neces sary hardware color decals full-size plans photo building guide radio installation directions List Price$32995 E&R Price$21995 BELLANCA DECATHLON top quality kit Pilot has wingspan 96/3 1519 sq area 60 long Kit features numbered die-cut hand-machined parts pre-cut window 3-dimensional instrument panel fullsized plans photo building guide pre-formed cowl wheel pants plus much List Price$30495 E&R Price$22995 NEW Bellanca Decathlon 40 same /4-scale kit above smaller has wingspan 67/4 774 sq wing area designed fly 40- 60-size engine List Price$13995 E&R Price$10695 FUTABA 6-FP-6FN radio complete standard charger including ERR special heavy-duty /4-scale pack age includes 4 large servos produce 154 oz torque 1 standard S-26 servo use throttle control also include heavy-duty 1800 MAH battery pack List Price$46990 E&R Price$32999 R R 1 Box 10 ______ Edgeley ND 58433 701/493-2015~obbieS PRODUCTS Complete Line Exhaust Systems * Tuned Pipes * Muffled Tuned Pipes * Headers * Venturi Mufflers * Expansion Mufflers Helicopter Ball Mufflers ialized Exhaust Systems Unsurpassed Worh~ h Pqrformance Nate 5 7208 7224 7240 7564 MHz Nate 6 See sec 2106 Commissions Rules Nate 7 NG49 following frequencies may autharized low-power 1 watt input mobile operations radio services shown subject condition no inter ference caused reception television stations operating channels 4 5 Manufacturers Radio Service MHZMHzMHzMHZMHZ 7202 7210 7218 7226 7234 7204 7212 7220 7228 7236 7206 7214 7222 7230 7238 7208 7216 7224 7232 7240 Special Industrial Radio Service Manufacturers Radio Service Railroad Radio Service MHz MHz MHz MHZ MHZ 7244 7252 7260 7548 7556 724d 7256 7544 7552 7560 Nate 8 NG56 Th frequencies 7208 7216 7224 7232 7240 7296 7564 MHz may authorized low power 1-watt put mobile operations Personal Radio Services radio control models subject condition interference will caused remote control industrial equip ment operating same adjacent fre quencies reception television stations operating Channels 4 5 TV terference shall considered occur ever reception regularly used television signals Impaired destroyed regardless strength television signais distance television station Note 9 No doubt reason Academy has requested access band segment 7586-7600 MHZ Bell XP-77/Berliner Continued paoe 44 tough would switch materials probably would have quit spot late June design gross weight up pqfl performance ysrem TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN KAB SUPER POSY THINNER K&B SUPER POSY PRIMER K&9 SUPER FOXY PAINT K&B MIXING CUPS 3650 lb still within plans Arnolds formula high wing loading would mean such long takeoff run decided cut structure gross weight 3000 lb Already price tag up $700000 end sight January 1943 six airplanes supposed have delivered Bell told Air Corps serious complications arisen efforts build high-speed airplane wood aiming July delivery first airplanes others end year schedule almost year off cost project up S2 million Bell blamed slippage need sub contract wood construction companies werent already loaded work troopcarrying gliders major friction tween Bell its subcontractors matters quality inspection working drawings top off Ranger engine having cooling troubles May 1943 serious thought given dumping entire XP-77 project because Bell couldnt concentrate- enough effort company too busy its P-63 Kingcobra very secret P-59 Airacomet jet flown first time October 1942 Finally Air Corps decided cancel thing first two prototypes felt would useful obtainingvaluable flight data type plywood aircraft troubles came light Bell stopped inspecting production factory Goshen Indiana Veneer Co building wings Air Corps help Bell discovered Goshen built set test wings no flight wings November 1943 Vidal Research Corp built both 132 Model Aviation scale Pitts S2A Pilot Kit Scale Flight u-uzu GEARED PROP DRIVE Swing Big Prop Realistic RPM Its she2 Ooncs Piop $1950 eKII-107 Con Pee Wee 020o 020 ,II sog 7-4 0-4 prOp 4 roabstcJeibcerrt sc4e IligOl KRESS TECHNOLOGY INC 27 Mdi Road IEI 6 11PM Lloyd i-lan,, N V 11743 00 /Ditibot inqokie ore lenited ZONA SAWS The one wood handle good blade Razor #200 $210 Sabre * 400 -$185 Sa100-389 Replacement blades available yosr dealer ModeS SupplyPO Box 3957 A 90510 uSA
Edition: Model Aviation - 1982/07
Page Numbers: 38, 39, 40, 129, 132
-I V-USI NvLiuc lyrpa Before FEDERAL COMMUNICATIONS COMMISSION Washington DC20554 Matter Amendment Parts 2 2122818790 95 Commissions Rules provide additional spectrum between 72 76 MHz radio control model aircraft boats cars other similar devices G-3 FCC 82-145 31081 General Docket 82-181 RM-3248 MHz radio control channels available due interference fixed land mobile operations industrial users use spectrum land mobile services growing 4 In addition need find replace ment frequencies 26-27 MHz 72-76 MHz channels Academy states need some 20 25 additional channels support growth Radio Control Radio Service over next ten years 5 As additional radio control channels requested might found Aced eny suggests secondary use ten 72-76 MHz channels currently allocated low power 1 watt less land mobile operations Special Industrial Manufacturers Railroad Radio Services along eleven guard band channels separating Govern ment non-Government allocations tween 30 42 MHz Academy also asks spectrum might found 222224 MHz 450-460 MHz 900 MHz bands 6 A series meetings held during fall 1979 Note 1] between members Commissions Staff Petitioner representatives several manufacturers radio control equipment discuss spectrum requirements manufacturers felt cause wide separation between eleven guard band channels between 30 42 MHz channels would well suited radio control models Commissions staff pointed out 222224 MHz band allocated part Amateur Radio Service attempt re-allocate spectrum would encounter much resistance amateur communi ty staff also pointed out heavy usage being made 450 460 MHz band Thus channels might readily available respect spectrum 900 MHz Academy indicated long term solution might use spectrum 900 MHZ however considerable testing would required before formal request could made Note 2] Adopted April 11982 Released April 131982 Commission Introduction 1 On 17 November 1978 Commission received petition CRM-3248 Acad emy Model Aeronautics Inc Academy requesting Commission amend Parts 2 95 Commissions Rules pro vide additional spectrum radio control model airplanes boats cars Acad emy stated additional spectrum needed order cope anticipated expan sion model activities during next ten years compensate diminished use existing thirteen frequencies 2699 2726 MHz 720 760 MHz bands due interference caused other op erations bands 2 The Academy states its petition because spectrum congestion high power operation forty Citizens Band Radio Service frequencies between 2696 2741 MHz 26-27 MHz band six inter leaved channels band allo cated Radio Control Radio Service nearly useless radio control operations 3 Currently Academy notes other spectrum available Radio Control Radio Service seven channels 72-76 MHz band however use second ary operational fixed stations Indus trial Land Transportation Public Safety Services well low power land mobile stations Manufacturers Radio Service According Academy num ber cities eg Houston TX Tampa FL etc few seven 72-76 7 As result series meetings Petitioner indicated near term 10 20 years spectrum requirements could best served allocation additional spec trum 72-76 MHz band end Petitioner established Joint Academy-Indus try Committee study nability ex panded radio control operations inter laced odd 20 kHz channels 72-76 MHz band ie 72.01 7203 7205 MHz etc establish technical parameters workable 72-76 MHz assignment plan 11 September 1980 Academy submitted Commission findings recom mendations Joint Committee Report 72-76 MHz Radio Control Systems dated September 1980 later modified letter dated 15 July 1981 8 The Academy Report proposes implemen tation additional 72-76 MHz frequencies follows a Model aircraft fifty 8 kHz chan nels starting 72010 MHz proceeding 38 Model Aviation IN JANUARY delegation Academy Frequency Committee met seven Federal Communications Commissioners Wash ington DC offices session 20-minute illustrated presentation given Fred Marks emphasize urgent need granting additional frequencies 72-76 MHz band soon scheduled action FCCS agenda special effort well received Commissioners climax four years AMA rts in-person meetings created better un derstanding within FCCS decision-making team concerning model avia tion growing need immediate relief minimal number radio frequencies presently available FCC April 1 voted adopt long-awaited Notice Proposed Rule Making NPRM released April 13 1982 public com ment Hundreds copies printed within hours after receipt mailed 200 key personnel including AMA officers model press model indus try Wednesday April 14 largest mailing printed packaged over 2200 AMA Chartered Clubs action newsletter editors publication FCC required responses NPRM within 30 days entailed rapid compressed schedule events Individuals received copies part key communications link AMA membership requested discuss NPRM club members AMA requested comments forwarded quickly possible preferably AMA Frequency Committee via AMA HQ Washington DC committee meet again April 30 May 1 draft single AMA response NPRM conjunction special weekend session model industry re view meeting planned coordinate industry inputs effort develop single AMA response NPRM behalf AMA membership should substantially decrease time required FCC decision expected release some 80 new frequencies later year Printed below NPRMBob Aberle Chairman AMA Frequency Committee NOTICE OF PROPOSED RULE MAKIrSG sdRuIE 20 kHz through 72990 MHz b Terrestrial models twenty-three 8 kHz channels starting 75410 MHz proceeding 20 kHz through 75850 MHz c Phase out existing seven 72 76 MHz frequencies within five years d Permit type emission used 9 The current rules restrict type emis sion employed radio control stations amplitude modulation Academy feels operations 72-76 MHz band should restricted using amplitude modulation point out frequency phase modulation used other coun tries may prove beneficial permitted country Discussion 10 The Commissions licensing records indi cate has considerable growth Radio Control Service over last f ifteen years particularly last five years can seen TABLE 1 attached hereto growth trend tends support Acad emys contention need ad ditional spectrum support anticipated expansion model activities over next ten years 11 At present Radio Control Radio Ser vice licensees have access thirteen 8 kHz channels six 26-27 MHz band [Note 31 seven 72-76 MI-Iz band [Note 4] control models thirteen channels four [Note 5] restricted solely control model aircraft Academy claims because sheer number licensees high power opeations forty Citizens Band Radio Service channels 27 MHz six interleaved radio control channels nearly useless radio control operation particularly control model aircraft suburban urban areas 12 The Academy also claims areas signal level fixed stations operat ing 72-76 MHz band precludes use some 72-76 MHz radio control chan nels Because growth land mobile radio service 7276 MHz fixed operations associated Academy feels number radio con trol channels precluded use because interference facilities supporting land mobile operations will drastically increase un less some relief forthcoming Academy suggests form relief would expand radio controllers access 7276 MHz band 13 In United States band segments 720-730 MHz 754-760 MHz 7276 MHz band currently allocated primary basis non-Government Fixed Service [Note 6] 20 kHz channelling plan begins 7202 MHz proceeds 7298 MHz 7560 through 7598 MHz has estab lished following FCC radio services permitted access spectrum AlaskaPublic Fixed Service Aviation Service mestic Public Fixed Radio Service Domestic Land Mobile Radio Service Industrial Radio Services Land Transportation Radio Services Maritime Service Public Safety Radio Ser vices Maritime Service Public Safety Radio Services Non-Government footnote 49 NG49 permits low power 1 watt less non-Government mobile service use limited number same 72-76 MHz chan nels several Industrial Land Transportation Sub-Radio Services [Note 7] Additionally non-Government footnote 56 NG56 permits secondary basis low power 1 watt less mobile service use seven channels control models li censees Radio Control Radio Service [Note 8] operations band sub ject condition no interference caused reception signals television channels 4 5 14 The 72-76 MHz frequencies predomi nantly used licensees private Part 90 common carrier Parts 21 22 radio services control remote transmit ters operating 30-50 MHz 152-162 MHz 450470 MHz bands both services high growth rates Developments likely increase demand 72-76 MHz transmitter control links land mobile service Telephone-company-supplied wireline control circuits 72-76 MHz systems can replace have both increased cost declined availability metallic copper pairs traditionally used transmitter control circuits available number areas carrier digital fiber optical technology has come use wireline con trol circuits available prices have inincreased point cost 7276 MHz radio system matched relative ly short time savings leased telephone line charges trend common carrier paging service moreover multiple site simulcast operations Control simulcast transmitters requires precise matching amplitude phase audio signals supplied individual transmitters dif ficult best achieve using wire line con trol circuits due day-to-day variations frequency phase response circuit However control simulcast transmitters easily achieved radio circuits 15 The reallocation twenty 35-43 MHz channels common carrier paging Report Order FCC 81-296 adopted 30 June 1981 CC Docket 80-189 pro posed allocation up hundred twenty 900 MHz paging channels both common carrier private systems General Docket 80-183 Notice Proposed Rule Making FCC 80-231 adopted 24 April 1980 Supplemental Notice Proposed Rule Mak ing FCC 80-510 adopted 21 October 1980 can expected place greater de mand upon frequency resources 72-76 MHz band transmitter control purposes Thus additional channels will precluded use possibilities interference transmitter control operations 16 justifying its request additional spectrum control models Acad emy states experience has shown fifteen models operated simultaneously given location operator confustion becomes major problem fore safety purposes number models operation given location practically limited fifteen less Addition ally Academy states desirable have additional five channels testing models Thus given modelling area total number desired interference free channels would twenty 17 In areas fixed stations operating channels ie 7202 7204 7296 7298 MHz 7542 7544 7598 MHz mobile use adjacent chan nels ie 7201 7203 97 7299 MHz 75417543 .7597 7599MHz would also precluded because potential interference being caused models re ceiver fixed station size area involved dependent primarily upon fixed station transmitter power amount natural radio shielding between fixed transmitter models receiver Thus provide requested twenty inter ference free channels given location modeler would need access block significantly twenty channels 18 The Academy feels modelers permitted access fifty channels con trol airborne models between 720 730 MHz twenty-three channels between 7540 7586 MHz control ter restrial models will able obtain July 198239 BASICS OF THE NPRM Assuming acceptance AMA proposals FCC will 50 new RC frequencies model aircraft will no longer sharing frequency numbers industrial users due very high power close proximity RC field interferes us will plenty other frequencies move 2 All existing equipment usable five years implementation date 3 All existing equipment usable year six year eight im plementation date change crystals re-tuning 4 After eighth year receivers exist now will made obsolete 5 Transmitters exist now operate narrow enough bandwidth usable forever crystal tuning changes twenty interference free channels locations 19 The Academy proposal would make avail able additional seventy-three new channels control models however would useable given location Some would excluded due interference caused continued use over next several years existing seven 72-76 MHz radio control channels others would ex cluded due interference caused fixed stations television broadcast stations op erating TV channels 4 5 Additionally intermodulation IM products caused use intermediate frequency IF 455 kHz may preclude use spectrum tween 7200-7252 7586-7600 MHz until such time equipment manufacturers can develop receiving systems employ different IF frequency Note 91 20 The potential harmful interference ing caused mobile radio model control transmitters fixed land mobile control sta tions slight First 10 kHz separa tion between model transmitter frequency control station receiver frequency Second model control station has trans mitter output power about 05 watts utilizes single vertical radiator approxi mately quarter wavelength ground plane consisting transmitter box fixed land mobile control station commonly operates output power 50 100 watts employs directional antennas both receiving transmitting stations fixed stations thus operate power level excess 20 dB above used control models combined direc tional characteristics fixed station anten nas should reduce possibility interfer ence problems occurring 21 There also slight potential harmful interference being caused mobile radio model control transmitters television recep tion channels 4 66-72 MHz 5 76-82 MHz general television station trans mitter output power excess 1 kilo watt Therefore ratio between model transmitter signal television transmit ter signal over 30 dB date have no recorded cases interference tele vision reception caused radio control models seven channels currently used 72-76 MHz Proposal 22 The Academys request additional mo bile service spectrum use frequency phase modulation well amplitude modu lation control models does have merit Therefore Commission proposes amend its Rules make available band segments 720-73fl 754-76fl MHz permit both amplitude frequency phase modulation control models accordance proposed rule changes outlined Appendix Editor Copies Appendix NPRM available free MA HQ Please include pre-oddressed No 10 size business envelope postage affixed get immediate attention note outiside lower left corner en velope AMA HQ NPRM Appendix 23 In addition footnote NG49 sec 2106 we now also including mobile service allocation column 8 bands 72-73 754-76fl MHz reflect actual use frequency bands parallels fixed service allocation both coyered footnotes NG1 NG3 includ ed Table Footnote NG49 also being amended specifically reflect its current pri mary status 72-73 75A-760 MHz band action simply editorial nature Regulatory Flexibility Act 1980 Initial Analysis 24 Reason action proceeding response petition rule making request ing additional spectrum radio control models 25 The objectives Commission desires comments proposal provide ex panded access 72-76 MHz band radio control models 26 Legal basis action proposed fur therance Sections 4i 303r Communications Act 1934 amended permits Commission make such rules regulations inconsistent law may necessary execution its functions additional view public welfare 27 Descriptions potential impact num ber small entities affected Implementation proposed rules would provide spectrum relief licensees perceive no ad verse impact other licensees mainly individuals engaged radio con trol models present over 200000 valid licenses force could pos sibly increase radio control equipment sales well sales models using radio equipment 28 Recording record-keeping other com pliance requirements No additional require ments would imposed proposed rule changes adopted 29 Federal rules overlap duplicate conflict proposed rules None 30 Any significant alternatives minimizing impact small entities consistent stated objective None 31 In accordance requirements Regulatory Flexibility Act 1980 PL 96-354 19 September 1980 Section 603a Secretary directed transmit copy initial analysis Chief Counsel Advocacy Small Business Administra tion 32 Authority issuance Notice contained Sections 4i 303r Communications Act 1934 amended 47 USC 4i 303r Pursuant proced ures set out Section 1415 Commis sions Rules Regulations 47 CFR 1 A15 interested persons may file comments before May 13 1982 reply comments before May 28 1982 relevant timely comments will considered Commission before final action taken proceeding reaching its decision Commission may take account informa tion ideas contained com ments provided such information writing indicating nature source such information placed public file provided fact Commis sions reliance such information noted Report Order 33 In accordance provisions Sec tion 1419 Commissions Rules Regulations 47 CFR 1 A19 formal partici pants shall file original five 5 copies comments other materials Par ticipants wishing Commissioner have personal copy comments should file original eleven 11 copies Members general public wish express interest participating informally may submitting 1 copy com ments given same consideration regardless number copies submitted documents will available public spection during regular business hours Commissions Public Reference Room its headquarters located 1919 M Street NW Washington DC 34 For purposes non-restricted notice comment rulemaking proceeding mem bers public advised ex parte contacts permitted time Commission adopts notice proposed rule making until time public notice issued stating substantive disposition matter considered forthcoming meeting until final order disposing matter adopted Commission ever earlier general ex porte presenta tion written oral communication other formal written commentslplead ings formal oral arguments between person outside Commission Com missioner member Commissions staff addresses merits pro ceeding Any person submits written ex porte presentation must serve copy presentation Commissions Secre tary inclusion public file Any per son makes oral ex porte presentation addressing matters fully covered previously-filed written comments proceeding must prepare written summary presentation day oral pres entation written summary must served Commissions Secretary clusion public file copy Commission official receiving oral presen tation ex porte presentation described above must state its face Secretary has served must also state dock et number proceeding relates See generally Section 11231 Commis sions rules 47 CFR 11231 35 For further information concerning pro cedures follow respect rule Continued page 129 40 Model Aviation TABLE 1 Number Radio Control Radio Service licenses force year end figures YearNo Licenses 196630300 196735695 196831721 196932600 197037598 197139094 197239514 197337736 197436774 1975533251 197686916 19771569012 1978191577 1979214314 1980226364 1981219387 Notes 11n March 1975 license fee reduced $2000 $400 21n January 1977 license fee eliminated hpxE Vmph527CD X Eq 6 must know hp propeller absorbingthe effective poweroutput engine approximate efficiency propeller can attain indicated V latter will vary substantially P/D 16 x 4 being capable about 67% maximum 9 x 7 being able reach about 85% maximum CD will vary greatly depending type aircraft involved can low 0025 up probably high 007 5 heavy slow flying biplane flat cowl lots wing struts wires wire-spoked wheels etc S should easy determine point illustrate much detail information needed calculate flight speed accurately Obviously get close multiplying pitch x rpm x efficiency will accident painless type Eq 6 can however used accurately quantify effect changing parameters involved leaving others fixed will close example involving E Lets suppose observed 11 x 694 propeller flight P real good power plant tuming 15000 rpm time J would 08 x 063 0504 actual V would about 115 fps or784 mph Fig 1 can determine F would about 077 Recognizing propeller operating higher-than-optimum angle attack wish change propellers P pitch reduced d must increased preserve hp net effect J will also decrease about 045 Fig will no longer valid since pitch angle will reduced FCC NPRM Continued aqe 40 making proceeding contact Donald Draper Campbell FCC Office Science Tech nology Spectrum Planning Branch Washing ton DC 20554 telephone 202 653-81 77 Federal Communications Commission William J Tricario Secretary Note 1 26 October 17 November 12 De cember 1979 Note 2 end Academy applied experimental license Part 5 19 August 1980 file number 8272-ER-PL-8o operate four 900 MHz frequencies An experimen tal license KK2XFz issued 28 Janu ary 1981 Note 3 26995 27045 27095 27145 27195 27255 MHz latter frequen cy shared other services Note 4 7208 7216 7224 7232 7240 7296 7564 MHz Continued page 132 SERVO GARD SERVO GARD mon bone fhght battery peck voltage well radio signal received transmitter cod reneiver malfunction detected part system SERVO GARO reduces throttle automatically ample time before battery failure safely land model SPECIFICATIONS Size unit installed KPS-14 servo case easy installation Just plug throttle servo output Weight Approx 1 oz Sensitivity Accurate within 02 Volts Servo Pulse Unit shipped positive pulse systems negative pulse available upon request SERVO GARD comes complete pro-wired pigtails servo connectors choice installed specify connector type orderl SEE YOUR DEALER OR ORDER DIRECT DEALER INOUIRIES IN VI TED Price $3795 Postpaid ISpecify connector typo positive negative pulse orderingl ENDORSED BY THE SPIRIT OF AMERICA SHOW TEAM LIMA OHIO R F Enterprises 106 N Main St Arlington OH 45814 419 365-5360 July 1982 129 Equating Eq 4a Eq. 5 solving y new efficiency curve will somewhat givesleft curve Fig 1 E J will beGet install don t take off about080 andthenewVwillbewithout Ken Willard RCM 6x 7841013 x 784 slight further increase V would result reduced slip stream velocity Such small change would justified desire squeeze last drop performance Out power plant engine plus propeller close hoped points have made clearly Take propellers complicated exciting further hoped article will enable respond definite yes answer asked question title truly BIG PuTS S-2A want superb 135 scale biplane kit features easy-to-build Snap-Lock construction numbered die-cut hand-machined balsa hardwood parts vacuum-formed cowl wheel pants clear windscreen neces sary hardware color decals full-size plans photo building guide radio installation directions List Price$32995 E&R Price$21995 BELLANCA DECATHLON top quality kit Pilot has wingspan 96/3 1519 sq area 60 long Kit features numbered die-cut hand-machined parts pre-cut window 3-dimensional instrument panel fullsized plans photo building guide pre-formed cowl wheel pants plus much List Price$30495 E&R Price$22995 NEW Bellanca Decathlon 40 same /4-scale kit above smaller has wingspan 67/4 774 sq wing area designed fly 40- 60-size engine List Price$13995 E&R Price$10695 FUTABA 6-FP-6FN radio complete standard charger including ERR special heavy-duty /4-scale pack age includes 4 large servos produce 154 oz torque 1 standard S-26 servo use throttle control also include heavy-duty 1800 MAH battery pack List Price$46990 E&R Price$32999 R R 1 Box 10 ______ Edgeley ND 58433 701/493-2015~obbieS PRODUCTS Complete Line Exhaust Systems * Tuned Pipes * Muffled Tuned Pipes * Headers * Venturi Mufflers * Expansion Mufflers Helicopter Ball Mufflers ialized Exhaust Systems Unsurpassed Worh~ h Pqrformance Nate 5 7208 7224 7240 7564 MHz Nate 6 See sec 2106 Commissions Rules Nate 7 NG49 following frequencies may autharized low-power 1 watt input mobile operations radio services shown subject condition no inter ference caused reception television stations operating channels 4 5 Manufacturers Radio Service MHZMHzMHzMHZMHZ 7202 7210 7218 7226 7234 7204 7212 7220 7228 7236 7206 7214 7222 7230 7238 7208 7216 7224 7232 7240 Special Industrial Radio Service Manufacturers Radio Service Railroad Radio Service MHz MHz MHz MHZ MHZ 7244 7252 7260 7548 7556 724d 7256 7544 7552 7560 Nate 8 NG56 Th frequencies 7208 7216 7224 7232 7240 7296 7564 MHz may authorized low power 1-watt put mobile operations Personal Radio Services radio control models subject condition interference will caused remote control industrial equip ment operating same adjacent fre quencies reception television stations operating Channels 4 5 TV terference shall considered occur ever reception regularly used television signals Impaired destroyed regardless strength television signais distance television station Note 9 No doubt reason Academy has requested access band segment 7586-7600 MHZ Bell XP-77/Berliner Continued paoe 44 tough would switch materials probably would have quit spot late June design gross weight up pqfl performance ysrem TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN KAB SUPER POSY THINNER K&B SUPER POSY PRIMER K&9 SUPER FOXY PAINT K&B MIXING CUPS 3650 lb still within plans Arnolds formula high wing loading would mean such long takeoff run decided cut structure gross weight 3000 lb Already price tag up $700000 end sight January 1943 six airplanes supposed have delivered Bell told Air Corps serious complications arisen efforts build high-speed airplane wood aiming July delivery first airplanes others end year schedule almost year off cost project up S2 million Bell blamed slippage need sub contract wood construction companies werent already loaded work troopcarrying gliders major friction tween Bell its subcontractors matters quality inspection working drawings top off Ranger engine having cooling troubles May 1943 serious thought given dumping entire XP-77 project because Bell couldnt concentrate- enough effort company too busy its P-63 Kingcobra very secret P-59 Airacomet jet flown first time October 1942 Finally Air Corps decided cancel thing first two prototypes felt would useful obtainingvaluable flight data type plywood aircraft troubles came light Bell stopped inspecting production factory Goshen Indiana Veneer Co building wings Air Corps help Bell discovered Goshen built set test wings no flight wings November 1943 Vidal Research Corp built both 132 Model Aviation scale Pitts S2A Pilot Kit Scale Flight u-uzu GEARED PROP DRIVE Swing Big Prop Realistic RPM Its she2 Ooncs Piop $1950 eKII-107 Con Pee Wee 020o 020 ,II sog 7-4 0-4 prOp 4 roabstcJeibcerrt sc4e IligOl KRESS TECHNOLOGY INC 27 Mdi Road IEI 6 11PM Lloyd i-lan,, N V 11743 00 /Ditibot inqokie ore lenited ZONA SAWS The one wood handle good blade Razor #200 $210 Sabre * 400 -$185 Sa100-389 Replacement blades available yosr dealer ModeS SupplyPO Box 3957 A 90510 uSA
Edition: Model Aviation - 1982/07
Page Numbers: 38, 39, 40, 129, 132
-I V-USI NvLiuc lyrpa Before FEDERAL COMMUNICATIONS COMMISSION Washington DC20554 Matter Amendment Parts 2 2122818790 95 Commissions Rules provide additional spectrum between 72 76 MHz radio control model aircraft boats cars other similar devices G-3 FCC 82-145 31081 General Docket 82-181 RM-3248 MHz radio control channels available due interference fixed land mobile operations industrial users use spectrum land mobile services growing 4 In addition need find replace ment frequencies 26-27 MHz 72-76 MHz channels Academy states need some 20 25 additional channels support growth Radio Control Radio Service over next ten years 5 As additional radio control channels requested might found Aced eny suggests secondary use ten 72-76 MHz channels currently allocated low power 1 watt less land mobile operations Special Industrial Manufacturers Railroad Radio Services along eleven guard band channels separating Govern ment non-Government allocations tween 30 42 MHz Academy also asks spectrum might found 222224 MHz 450-460 MHz 900 MHz bands 6 A series meetings held during fall 1979 Note 1] between members Commissions Staff Petitioner representatives several manufacturers radio control equipment discuss spectrum requirements manufacturers felt cause wide separation between eleven guard band channels between 30 42 MHz channels would well suited radio control models Commissions staff pointed out 222224 MHz band allocated part Amateur Radio Service attempt re-allocate spectrum would encounter much resistance amateur communi ty staff also pointed out heavy usage being made 450 460 MHz band Thus channels might readily available respect spectrum 900 MHz Academy indicated long term solution might use spectrum 900 MHZ however considerable testing would required before formal request could made Note 2] Adopted April 11982 Released April 131982 Commission Introduction 1 On 17 November 1978 Commission received petition CRM-3248 Acad emy Model Aeronautics Inc Academy requesting Commission amend Parts 2 95 Commissions Rules pro vide additional spectrum radio control model airplanes boats cars Acad emy stated additional spectrum needed order cope anticipated expan sion model activities during next ten years compensate diminished use existing thirteen frequencies 2699 2726 MHz 720 760 MHz bands due interference caused other op erations bands 2 The Academy states its petition because spectrum congestion high power operation forty Citizens Band Radio Service frequencies between 2696 2741 MHz 26-27 MHz band six inter leaved channels band allo cated Radio Control Radio Service nearly useless radio control operations 3 Currently Academy notes other spectrum available Radio Control Radio Service seven channels 72-76 MHz band however use second ary operational fixed stations Indus trial Land Transportation Public Safety Services well low power land mobile stations Manufacturers Radio Service According Academy num ber cities eg Houston TX Tampa FL etc few seven 72-76 7 As result series meetings Petitioner indicated near term 10 20 years spectrum requirements could best served allocation additional spec trum 72-76 MHz band end Petitioner established Joint Academy-Indus try Committee study nability ex panded radio control operations inter laced odd 20 kHz channels 72-76 MHz band ie 72.01 7203 7205 MHz etc establish technical parameters workable 72-76 MHz assignment plan 11 September 1980 Academy submitted Commission findings recom mendations Joint Committee Report 72-76 MHz Radio Control Systems dated September 1980 later modified letter dated 15 July 1981 8 The Academy Report proposes implemen tation additional 72-76 MHz frequencies follows a Model aircraft fifty 8 kHz chan nels starting 72010 MHz proceeding 38 Model Aviation IN JANUARY delegation Academy Frequency Committee met seven Federal Communications Commissioners Wash ington DC offices session 20-minute illustrated presentation given Fred Marks emphasize urgent need granting additional frequencies 72-76 MHz band soon scheduled action FCCS agenda special effort well received Commissioners climax four years AMA rts in-person meetings created better un derstanding within FCCS decision-making team concerning model avia tion growing need immediate relief minimal number radio frequencies presently available FCC April 1 voted adopt long-awaited Notice Proposed Rule Making NPRM released April 13 1982 public com ment Hundreds copies printed within hours after receipt mailed 200 key personnel including AMA officers model press model indus try Wednesday April 14 largest mailing printed packaged over 2200 AMA Chartered Clubs action newsletter editors publication FCC required responses NPRM within 30 days entailed rapid compressed schedule events Individuals received copies part key communications link AMA membership requested discuss NPRM club members AMA requested comments forwarded quickly possible preferably AMA Frequency Committee via AMA HQ Washington DC committee meet again April 30 May 1 draft single AMA response NPRM conjunction special weekend session model industry re view meeting planned coordinate industry inputs effort develop single AMA response NPRM behalf AMA membership should substantially decrease time required FCC decision expected release some 80 new frequencies later year Printed below NPRMBob Aberle Chairman AMA Frequency Committee NOTICE OF PROPOSED RULE MAKIrSG sdRuIE 20 kHz through 72990 MHz b Terrestrial models twenty-three 8 kHz channels starting 75410 MHz proceeding 20 kHz through 75850 MHz c Phase out existing seven 72 76 MHz frequencies within five years d Permit type emission used 9 The current rules restrict type emis sion employed radio control stations amplitude modulation Academy feels operations 72-76 MHz band should restricted using amplitude modulation point out frequency phase modulation used other coun tries may prove beneficial permitted country Discussion 10 The Commissions licensing records indi cate has considerable growth Radio Control Service over last f ifteen years particularly last five years can seen TABLE 1 attached hereto growth trend tends support Acad emys contention need ad ditional spectrum support anticipated expansion model activities over next ten years 11 At present Radio Control Radio Ser vice licensees have access thirteen 8 kHz channels six 26-27 MHz band [Note 31 seven 72-76 MI-Iz band [Note 4] control models thirteen channels four [Note 5] restricted solely control model aircraft Academy claims because sheer number licensees high power opeations forty Citizens Band Radio Service channels 27 MHz six interleaved radio control channels nearly useless radio control operation particularly control model aircraft suburban urban areas 12 The Academy also claims areas signal level fixed stations operat ing 72-76 MHz band precludes use some 72-76 MHz radio control chan nels Because growth land mobile radio service 7276 MHz fixed operations associated Academy feels number radio con trol channels precluded use because interference facilities supporting land mobile operations will drastically increase un less some relief forthcoming Academy suggests form relief would expand radio controllers access 7276 MHz band 13 In United States band segments 720-730 MHz 754-760 MHz 7276 MHz band currently allocated primary basis non-Government Fixed Service [Note 6] 20 kHz channelling plan begins 7202 MHz proceeds 7298 MHz 7560 through 7598 MHz has estab lished following FCC radio services permitted access spectrum AlaskaPublic Fixed Service Aviation Service mestic Public Fixed Radio Service Domestic Land Mobile Radio Service Industrial Radio Services Land Transportation Radio Services Maritime Service Public Safety Radio Ser vices Maritime Service Public Safety Radio Services Non-Government footnote 49 NG49 permits low power 1 watt less non-Government mobile service use limited number same 72-76 MHz chan nels several Industrial Land Transportation Sub-Radio Services [Note 7] Additionally non-Government footnote 56 NG56 permits secondary basis low power 1 watt less mobile service use seven channels control models li censees Radio Control Radio Service [Note 8] operations band sub ject condition no interference caused reception signals television channels 4 5 14 The 72-76 MHz frequencies predomi nantly used licensees private Part 90 common carrier Parts 21 22 radio services control remote transmit ters operating 30-50 MHz 152-162 MHz 450470 MHz bands both services high growth rates Developments likely increase demand 72-76 MHz transmitter control links land mobile service Telephone-company-supplied wireline control circuits 72-76 MHz systems can replace have both increased cost declined availability metallic copper pairs traditionally used transmitter control circuits available number areas carrier digital fiber optical technology has come use wireline con trol circuits available prices have inincreased point cost 7276 MHz radio system matched relative ly short time savings leased telephone line charges trend common carrier paging service moreover multiple site simulcast operations Control simulcast transmitters requires precise matching amplitude phase audio signals supplied individual transmitters dif ficult best achieve using wire line con trol circuits due day-to-day variations frequency phase response circuit However control simulcast transmitters easily achieved radio circuits 15 The reallocation twenty 35-43 MHz channels common carrier paging Report Order FCC 81-296 adopted 30 June 1981 CC Docket 80-189 pro posed allocation up hundred twenty 900 MHz paging channels both common carrier private systems General Docket 80-183 Notice Proposed Rule Making FCC 80-231 adopted 24 April 1980 Supplemental Notice Proposed Rule Mak ing FCC 80-510 adopted 21 October 1980 can expected place greater de mand upon frequency resources 72-76 MHz band transmitter control purposes Thus additional channels will precluded use possibilities interference transmitter control operations 16 justifying its request additional spectrum control models Acad emy states experience has shown fifteen models operated simultaneously given location operator confustion becomes major problem fore safety purposes number models operation given location practically limited fifteen less Addition ally Academy states desirable have additional five channels testing models Thus given modelling area total number desired interference free channels would twenty 17 In areas fixed stations operating channels ie 7202 7204 7296 7298 MHz 7542 7544 7598 MHz mobile use adjacent chan nels ie 7201 7203 97 7299 MHz 75417543 .7597 7599MHz would also precluded because potential interference being caused models re ceiver fixed station size area involved dependent primarily upon fixed station transmitter power amount natural radio shielding between fixed transmitter models receiver Thus provide requested twenty inter ference free channels given location modeler would need access block significantly twenty channels 18 The Academy feels modelers permitted access fifty channels con trol airborne models between 720 730 MHz twenty-three channels between 7540 7586 MHz control ter restrial models will able obtain July 198239 BASICS OF THE NPRM Assuming acceptance AMA proposals FCC will 50 new RC frequencies model aircraft will no longer sharing frequency numbers industrial users due very high power close proximity RC field interferes us will plenty other frequencies move 2 All existing equipment usable five years implementation date 3 All existing equipment usable year six year eight im plementation date change crystals re-tuning 4 After eighth year receivers exist now will made obsolete 5 Transmitters exist now operate narrow enough bandwidth usable forever crystal tuning changes twenty interference free channels locations 19 The Academy proposal would make avail able additional seventy-three new channels control models however would useable given location Some would excluded due interference caused continued use over next several years existing seven 72-76 MHz radio control channels others would ex cluded due interference caused fixed stations television broadcast stations op erating TV channels 4 5 Additionally intermodulation IM products caused use intermediate frequency IF 455 kHz may preclude use spectrum tween 7200-7252 7586-7600 MHz until such time equipment manufacturers can develop receiving systems employ different IF frequency Note 91 20 The potential harmful interference ing caused mobile radio model control transmitters fixed land mobile control sta tions slight First 10 kHz separa tion between model transmitter frequency control station receiver frequency Second model control station has trans mitter output power about 05 watts utilizes single vertical radiator approxi mately quarter wavelength ground plane consisting transmitter box fixed land mobile control station commonly operates output power 50 100 watts employs directional antennas both receiving transmitting stations fixed stations thus operate power level excess 20 dB above used control models combined direc tional characteristics fixed station anten nas should reduce possibility interfer ence problems occurring 21 There also slight potential harmful interference being caused mobile radio model control transmitters television recep tion channels 4 66-72 MHz 5 76-82 MHz general television station trans mitter output power excess 1 kilo watt Therefore ratio between model transmitter signal television transmit ter signal over 30 dB date have no recorded cases interference tele vision reception caused radio control models seven channels currently used 72-76 MHz Proposal 22 The Academys request additional mo bile service spectrum use frequency phase modulation well amplitude modu lation control models does have merit Therefore Commission proposes amend its Rules make available band segments 720-73fl 754-76fl MHz permit both amplitude frequency phase modulation control models accordance proposed rule changes outlined Appendix Editor Copies Appendix NPRM available free MA HQ Please include pre-oddressed No 10 size business envelope postage affixed get immediate attention note outiside lower left corner en velope AMA HQ NPRM Appendix 23 In addition footnote NG49 sec 2106 we now also including mobile service allocation column 8 bands 72-73 754-76fl MHz reflect actual use frequency bands parallels fixed service allocation both coyered footnotes NG1 NG3 includ ed Table Footnote NG49 also being amended specifically reflect its current pri mary status 72-73 75A-760 MHz band action simply editorial nature Regulatory Flexibility Act 1980 Initial Analysis 24 Reason action proceeding response petition rule making request ing additional spectrum radio control models 25 The objectives Commission desires comments proposal provide ex panded access 72-76 MHz band radio control models 26 Legal basis action proposed fur therance Sections 4i 303r Communications Act 1934 amended permits Commission make such rules regulations inconsistent law may necessary execution its functions additional view public welfare 27 Descriptions potential impact num ber small entities affected Implementation proposed rules would provide spectrum relief licensees perceive no ad verse impact other licensees mainly individuals engaged radio con trol models present over 200000 valid licenses force could pos sibly increase radio control equipment sales well sales models using radio equipment 28 Recording record-keeping other com pliance requirements No additional require ments would imposed proposed rule changes adopted 29 Federal rules overlap duplicate conflict proposed rules None 30 Any significant alternatives minimizing impact small entities consistent stated objective None 31 In accordance requirements Regulatory Flexibility Act 1980 PL 96-354 19 September 1980 Section 603a Secretary directed transmit copy initial analysis Chief Counsel Advocacy Small Business Administra tion 32 Authority issuance Notice contained Sections 4i 303r Communications Act 1934 amended 47 USC 4i 303r Pursuant proced ures set out Section 1415 Commis sions Rules Regulations 47 CFR 1 A15 interested persons may file comments before May 13 1982 reply comments before May 28 1982 relevant timely comments will considered Commission before final action taken proceeding reaching its decision Commission may take account informa tion ideas contained com ments provided such information writing indicating nature source such information placed public file provided fact Commis sions reliance such information noted Report Order 33 In accordance provisions Sec tion 1419 Commissions Rules Regulations 47 CFR 1 A19 formal partici pants shall file original five 5 copies comments other materials Par ticipants wishing Commissioner have personal copy comments should file original eleven 11 copies Members general public wish express interest participating informally may submitting 1 copy com ments given same consideration regardless number copies submitted documents will available public spection during regular business hours Commissions Public Reference Room its headquarters located 1919 M Street NW Washington DC 34 For purposes non-restricted notice comment rulemaking proceeding mem bers public advised ex parte contacts permitted time Commission adopts notice proposed rule making until time public notice issued stating substantive disposition matter considered forthcoming meeting until final order disposing matter adopted Commission ever earlier general ex porte presenta tion written oral communication other formal written commentslplead ings formal oral arguments between person outside Commission Com missioner member Commissions staff addresses merits pro ceeding Any person submits written ex porte presentation must serve copy presentation Commissions Secre tary inclusion public file Any per son makes oral ex porte presentation addressing matters fully covered previously-filed written comments proceeding must prepare written summary presentation day oral pres entation written summary must served Commissions Secretary clusion public file copy Commission official receiving oral presen tation ex porte presentation described above must state its face Secretary has served must also state dock et number proceeding relates See generally Section 11231 Commis sions rules 47 CFR 11231 35 For further information concerning pro cedures follow respect rule Continued page 129 40 Model Aviation TABLE 1 Number Radio Control Radio Service licenses force year end figures YearNo Licenses 196630300 196735695 196831721 196932600 197037598 197139094 197239514 197337736 197436774 1975533251 197686916 19771569012 1978191577 1979214314 1980226364 1981219387 Notes 11n March 1975 license fee reduced $2000 $400 21n January 1977 license fee eliminated hpxE Vmph527CD X Eq 6 must know hp propeller absorbingthe effective poweroutput engine approximate efficiency propeller can attain indicated V latter will vary substantially P/D 16 x 4 being capable about 67% maximum 9 x 7 being able reach about 85% maximum CD will vary greatly depending type aircraft involved can low 0025 up probably high 007 5 heavy slow flying biplane flat cowl lots wing struts wires wire-spoked wheels etc S should easy determine point illustrate much detail information needed calculate flight speed accurately Obviously get close multiplying pitch x rpm x efficiency will accident painless type Eq 6 can however used accurately quantify effect changing parameters involved leaving others fixed will close example involving E Lets suppose observed 11 x 694 propeller flight P real good power plant tuming 15000 rpm time J would 08 x 063 0504 actual V would about 115 fps or784 mph Fig 1 can determine F would about 077 Recognizing propeller operating higher-than-optimum angle attack wish change propellers P pitch reduced d must increased preserve hp net effect J will also decrease about 045 Fig will no longer valid since pitch angle will reduced FCC NPRM Continued aqe 40 making proceeding contact Donald Draper Campbell FCC Office Science Tech nology Spectrum Planning Branch Washing ton DC 20554 telephone 202 653-81 77 Federal Communications Commission William J Tricario Secretary Note 1 26 October 17 November 12 De cember 1979 Note 2 end Academy applied experimental license Part 5 19 August 1980 file number 8272-ER-PL-8o operate four 900 MHz frequencies An experimen tal license KK2XFz issued 28 Janu ary 1981 Note 3 26995 27045 27095 27145 27195 27255 MHz latter frequen cy shared other services Note 4 7208 7216 7224 7232 7240 7296 7564 MHz Continued page 132 SERVO GARD SERVO GARD mon bone fhght battery peck voltage well radio signal received transmitter cod reneiver malfunction detected part system SERVO GARO reduces throttle automatically ample time before battery failure safely land model SPECIFICATIONS Size unit installed KPS-14 servo case easy installation Just plug throttle servo output Weight Approx 1 oz Sensitivity Accurate within 02 Volts Servo Pulse Unit shipped positive pulse systems negative pulse available upon request SERVO GARD comes complete pro-wired pigtails servo connectors choice installed specify connector type orderl SEE YOUR DEALER OR ORDER DIRECT DEALER INOUIRIES IN VI TED Price $3795 Postpaid ISpecify connector typo positive negative pulse orderingl ENDORSED BY THE SPIRIT OF AMERICA SHOW TEAM LIMA OHIO R F Enterprises 106 N Main St Arlington OH 45814 419 365-5360 July 1982 129 Equating Eq 4a Eq. 5 solving y new efficiency curve will somewhat givesleft curve Fig 1 E J will beGet install don t take off about080 andthenewVwillbewithout Ken Willard RCM 6x 7841013 x 784 slight further increase V would result reduced slip stream velocity Such small change would justified desire squeeze last drop performance Out power plant engine plus propeller close hoped points have made clearly Take propellers complicated exciting further hoped article will enable respond definite yes answer asked question title truly BIG PuTS S-2A want superb 135 scale biplane kit features easy-to-build Snap-Lock construction numbered die-cut hand-machined balsa hardwood parts vacuum-formed cowl wheel pants clear windscreen neces sary hardware color decals full-size plans photo building guide radio installation directions List Price$32995 E&R Price$21995 BELLANCA DECATHLON top quality kit Pilot has wingspan 96/3 1519 sq area 60 long Kit features numbered die-cut hand-machined parts pre-cut window 3-dimensional instrument panel fullsized plans photo building guide pre-formed cowl wheel pants plus much List Price$30495 E&R Price$22995 NEW Bellanca Decathlon 40 same /4-scale kit above smaller has wingspan 67/4 774 sq wing area designed fly 40- 60-size engine List Price$13995 E&R Price$10695 FUTABA 6-FP-6FN radio complete standard charger including ERR special heavy-duty /4-scale pack age includes 4 large servos produce 154 oz torque 1 standard S-26 servo use throttle control also include heavy-duty 1800 MAH battery pack List Price$46990 E&R Price$32999 R R 1 Box 10 ______ Edgeley ND 58433 701/493-2015~obbieS PRODUCTS Complete Line Exhaust Systems * Tuned Pipes * Muffled Tuned Pipes * Headers * Venturi Mufflers * Expansion Mufflers Helicopter Ball Mufflers ialized Exhaust Systems Unsurpassed Worh~ h Pqrformance Nate 5 7208 7224 7240 7564 MHz Nate 6 See sec 2106 Commissions Rules Nate 7 NG49 following frequencies may autharized low-power 1 watt input mobile operations radio services shown subject condition no inter ference caused reception television stations operating channels 4 5 Manufacturers Radio Service MHZMHzMHzMHZMHZ 7202 7210 7218 7226 7234 7204 7212 7220 7228 7236 7206 7214 7222 7230 7238 7208 7216 7224 7232 7240 Special Industrial Radio Service Manufacturers Radio Service Railroad Radio Service MHz MHz MHz MHZ MHZ 7244 7252 7260 7548 7556 724d 7256 7544 7552 7560 Nate 8 NG56 Th frequencies 7208 7216 7224 7232 7240 7296 7564 MHz may authorized low power 1-watt put mobile operations Personal Radio Services radio control models subject condition interference will caused remote control industrial equip ment operating same adjacent fre quencies reception television stations operating Channels 4 5 TV terference shall considered occur ever reception regularly used television signals Impaired destroyed regardless strength television signais distance television station Note 9 No doubt reason Academy has requested access band segment 7586-7600 MHZ Bell XP-77/Berliner Continued paoe 44 tough would switch materials probably would have quit spot late June design gross weight up pqfl performance ysrem TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN KAB SUPER POSY THINNER K&B SUPER POSY PRIMER K&9 SUPER FOXY PAINT K&B MIXING CUPS 3650 lb still within plans Arnolds formula high wing loading would mean such long takeoff run decided cut structure gross weight 3000 lb Already price tag up $700000 end sight January 1943 six airplanes supposed have delivered Bell told Air Corps serious complications arisen efforts build high-speed airplane wood aiming July delivery first airplanes others end year schedule almost year off cost project up S2 million Bell blamed slippage need sub contract wood construction companies werent already loaded work troopcarrying gliders major friction tween Bell its subcontractors matters quality inspection working drawings top off Ranger engine having cooling troubles May 1943 serious thought given dumping entire XP-77 project because Bell couldnt concentrate- enough effort company too busy its P-63 Kingcobra very secret P-59 Airacomet jet flown first time October 1942 Finally Air Corps decided cancel thing first two prototypes felt would useful obtainingvaluable flight data type plywood aircraft troubles came light Bell stopped inspecting production factory Goshen Indiana Veneer Co building wings Air Corps help Bell discovered Goshen built set test wings no flight wings November 1943 Vidal Research Corp built both 132 Model Aviation scale Pitts S2A Pilot Kit Scale Flight u-uzu GEARED PROP DRIVE Swing Big Prop Realistic RPM Its she2 Ooncs Piop $1950 eKII-107 Con Pee Wee 020o 020 ,II sog 7-4 0-4 prOp 4 roabstcJeibcerrt sc4e IligOl KRESS TECHNOLOGY INC 27 Mdi Road IEI 6 11PM Lloyd i-lan,, N V 11743 00 /Ditibot inqokie ore lenited ZONA SAWS The one wood handle good blade Razor #200 $210 Sabre * 400 -$185 Sa100-389 Replacement blades available yosr dealer ModeS SupplyPO Box 3957 A 90510 uSA
Edition: Model Aviation - 1982/07
Page Numbers: 38, 39, 40, 129, 132
-I V-USI NvLiuc lyrpa Before FEDERAL COMMUNICATIONS COMMISSION Washington DC20554 Matter Amendment Parts 2 2122818790 95 Commissions Rules provide additional spectrum between 72 76 MHz radio control model aircraft boats cars other similar devices G-3 FCC 82-145 31081 General Docket 82-181 RM-3248 MHz radio control channels available due interference fixed land mobile operations industrial users use spectrum land mobile services growing 4 In addition need find replace ment frequencies 26-27 MHz 72-76 MHz channels Academy states need some 20 25 additional channels support growth Radio Control Radio Service over next ten years 5 As additional radio control channels requested might found Aced eny suggests secondary use ten 72-76 MHz channels currently allocated low power 1 watt less land mobile operations Special Industrial Manufacturers Railroad Radio Services along eleven guard band channels separating Govern ment non-Government allocations tween 30 42 MHz Academy also asks spectrum might found 222224 MHz 450-460 MHz 900 MHz bands 6 A series meetings held during fall 1979 Note 1] between members Commissions Staff Petitioner representatives several manufacturers radio control equipment discuss spectrum requirements manufacturers felt cause wide separation between eleven guard band channels between 30 42 MHz channels would well suited radio control models Commissions staff pointed out 222224 MHz band allocated part Amateur Radio Service attempt re-allocate spectrum would encounter much resistance amateur communi ty staff also pointed out heavy usage being made 450 460 MHz band Thus channels might readily available respect spectrum 900 MHz Academy indicated long term solution might use spectrum 900 MHZ however considerable testing would required before formal request could made Note 2] Adopted April 11982 Released April 131982 Commission Introduction 1 On 17 November 1978 Commission received petition CRM-3248 Acad emy Model Aeronautics Inc Academy requesting Commission amend Parts 2 95 Commissions Rules pro vide additional spectrum radio control model airplanes boats cars Acad emy stated additional spectrum needed order cope anticipated expan sion model activities during next ten years compensate diminished use existing thirteen frequencies 2699 2726 MHz 720 760 MHz bands due interference caused other op erations bands 2 The Academy states its petition because spectrum congestion high power operation forty Citizens Band Radio Service frequencies between 2696 2741 MHz 26-27 MHz band six inter leaved channels band allo cated Radio Control Radio Service nearly useless radio control operations 3 Currently Academy notes other spectrum available Radio Control Radio Service seven channels 72-76 MHz band however use second ary operational fixed stations Indus trial Land Transportation Public Safety Services well low power land mobile stations Manufacturers Radio Service According Academy num ber cities eg Houston TX Tampa FL etc few seven 72-76 7 As result series meetings Petitioner indicated near term 10 20 years spectrum requirements could best served allocation additional spec trum 72-76 MHz band end Petitioner established Joint Academy-Indus try Committee study nability ex panded radio control operations inter laced odd 20 kHz channels 72-76 MHz band ie 72.01 7203 7205 MHz etc establish technical parameters workable 72-76 MHz assignment plan 11 September 1980 Academy submitted Commission findings recom mendations Joint Committee Report 72-76 MHz Radio Control Systems dated September 1980 later modified letter dated 15 July 1981 8 The Academy Report proposes implemen tation additional 72-76 MHz frequencies follows a Model aircraft fifty 8 kHz chan nels starting 72010 MHz proceeding 38 Model Aviation IN JANUARY delegation Academy Frequency Committee met seven Federal Communications Commissioners Wash ington DC offices session 20-minute illustrated presentation given Fred Marks emphasize urgent need granting additional frequencies 72-76 MHz band soon scheduled action FCCS agenda special effort well received Commissioners climax four years AMA rts in-person meetings created better un derstanding within FCCS decision-making team concerning model avia tion growing need immediate relief minimal number radio frequencies presently available FCC April 1 voted adopt long-awaited Notice Proposed Rule Making NPRM released April 13 1982 public com ment Hundreds copies printed within hours after receipt mailed 200 key personnel including AMA officers model press model indus try Wednesday April 14 largest mailing printed packaged over 2200 AMA Chartered Clubs action newsletter editors publication FCC required responses NPRM within 30 days entailed rapid compressed schedule events Individuals received copies part key communications link AMA membership requested discuss NPRM club members AMA requested comments forwarded quickly possible preferably AMA Frequency Committee via AMA HQ Washington DC committee meet again April 30 May 1 draft single AMA response NPRM conjunction special weekend session model industry re view meeting planned coordinate industry inputs effort develop single AMA response NPRM behalf AMA membership should substantially decrease time required FCC decision expected release some 80 new frequencies later year Printed below NPRMBob Aberle Chairman AMA Frequency Committee NOTICE OF PROPOSED RULE MAKIrSG sdRuIE 20 kHz through 72990 MHz b Terrestrial models twenty-three 8 kHz channels starting 75410 MHz proceeding 20 kHz through 75850 MHz c Phase out existing seven 72 76 MHz frequencies within five years d Permit type emission used 9 The current rules restrict type emis sion employed radio control stations amplitude modulation Academy feels operations 72-76 MHz band should restricted using amplitude modulation point out frequency phase modulation used other coun tries may prove beneficial permitted country Discussion 10 The Commissions licensing records indi cate has considerable growth Radio Control Service over last f ifteen years particularly last five years can seen TABLE 1 attached hereto growth trend tends support Acad emys contention need ad ditional spectrum support anticipated expansion model activities over next ten years 11 At present Radio Control Radio Ser vice licensees have access thirteen 8 kHz channels six 26-27 MHz band [Note 31 seven 72-76 MI-Iz band [Note 4] control models thirteen channels four [Note 5] restricted solely control model aircraft Academy claims because sheer number licensees high power opeations forty Citizens Band Radio Service channels 27 MHz six interleaved radio control channels nearly useless radio control operation particularly control model aircraft suburban urban areas 12 The Academy also claims areas signal level fixed stations operat ing 72-76 MHz band precludes use some 72-76 MHz radio control chan nels Because growth land mobile radio service 7276 MHz fixed operations associated Academy feels number radio con trol channels precluded use because interference facilities supporting land mobile operations will drastically increase un less some relief forthcoming Academy suggests form relief would expand radio controllers access 7276 MHz band 13 In United States band segments 720-730 MHz 754-760 MHz 7276 MHz band currently allocated primary basis non-Government Fixed Service [Note 6] 20 kHz channelling plan begins 7202 MHz proceeds 7298 MHz 7560 through 7598 MHz has estab lished following FCC radio services permitted access spectrum AlaskaPublic Fixed Service Aviation Service mestic Public Fixed Radio Service Domestic Land Mobile Radio Service Industrial Radio Services Land Transportation Radio Services Maritime Service Public Safety Radio Ser vices Maritime Service Public Safety Radio Services Non-Government footnote 49 NG49 permits low power 1 watt less non-Government mobile service use limited number same 72-76 MHz chan nels several Industrial Land Transportation Sub-Radio Services [Note 7] Additionally non-Government footnote 56 NG56 permits secondary basis low power 1 watt less mobile service use seven channels control models li censees Radio Control Radio Service [Note 8] operations band sub ject condition no interference caused reception signals television channels 4 5 14 The 72-76 MHz frequencies predomi nantly used licensees private Part 90 common carrier Parts 21 22 radio services control remote transmit ters operating 30-50 MHz 152-162 MHz 450470 MHz bands both services high growth rates Developments likely increase demand 72-76 MHz transmitter control links land mobile service Telephone-company-supplied wireline control circuits 72-76 MHz systems can replace have both increased cost declined availability metallic copper pairs traditionally used transmitter control circuits available number areas carrier digital fiber optical technology has come use wireline con trol circuits available prices have inincreased point cost 7276 MHz radio system matched relative ly short time savings leased telephone line charges trend common carrier paging service moreover multiple site simulcast operations Control simulcast transmitters requires precise matching amplitude phase audio signals supplied individual transmitters dif ficult best achieve using wire line con trol circuits due day-to-day variations frequency phase response circuit However control simulcast transmitters easily achieved radio circuits 15 The reallocation twenty 35-43 MHz channels common carrier paging Report Order FCC 81-296 adopted 30 June 1981 CC Docket 80-189 pro posed allocation up hundred twenty 900 MHz paging channels both common carrier private systems General Docket 80-183 Notice Proposed Rule Making FCC 80-231 adopted 24 April 1980 Supplemental Notice Proposed Rule Mak ing FCC 80-510 adopted 21 October 1980 can expected place greater de mand upon frequency resources 72-76 MHz band transmitter control purposes Thus additional channels will precluded use possibilities interference transmitter control operations 16 justifying its request additional spectrum control models Acad emy states experience has shown fifteen models operated simultaneously given location operator confustion becomes major problem fore safety purposes number models operation given location practically limited fifteen less Addition ally Academy states desirable have additional five channels testing models Thus given modelling area total number desired interference free channels would twenty 17 In areas fixed stations operating channels ie 7202 7204 7296 7298 MHz 7542 7544 7598 MHz mobile use adjacent chan nels ie 7201 7203 97 7299 MHz 75417543 .7597 7599MHz would also precluded because potential interference being caused models re ceiver fixed station size area involved dependent primarily upon fixed station transmitter power amount natural radio shielding between fixed transmitter models receiver Thus provide requested twenty inter ference free channels given location modeler would need access block significantly twenty channels 18 The Academy feels modelers permitted access fifty channels con trol airborne models between 720 730 MHz twenty-three channels between 7540 7586 MHz control ter restrial models will able obtain July 198239 BASICS OF THE NPRM Assuming acceptance AMA proposals FCC will 50 new RC frequencies model aircraft will no longer sharing frequency numbers industrial users due very high power close proximity RC field interferes us will plenty other frequencies move 2 All existing equipment usable five years implementation date 3 All existing equipment usable year six year eight im plementation date change crystals re-tuning 4 After eighth year receivers exist now will made obsolete 5 Transmitters exist now operate narrow enough bandwidth usable forever crystal tuning changes twenty interference free channels locations 19 The Academy proposal would make avail able additional seventy-three new channels control models however would useable given location Some would excluded due interference caused continued use over next several years existing seven 72-76 MHz radio control channels others would ex cluded due interference caused fixed stations television broadcast stations op erating TV channels 4 5 Additionally intermodulation IM products caused use intermediate frequency IF 455 kHz may preclude use spectrum tween 7200-7252 7586-7600 MHz until such time equipment manufacturers can develop receiving systems employ different IF frequency Note 91 20 The potential harmful interference ing caused mobile radio model control transmitters fixed land mobile control sta tions slight First 10 kHz separa tion between model transmitter frequency control station receiver frequency Second model control station has trans mitter output power about 05 watts utilizes single vertical radiator approxi mately quarter wavelength ground plane consisting transmitter box fixed land mobile control station commonly operates output power 50 100 watts employs directional antennas both receiving transmitting stations fixed stations thus operate power level excess 20 dB above used control models combined direc tional characteristics fixed station anten nas should reduce possibility interfer ence problems occurring 21 There also slight potential harmful interference being caused mobile radio model control transmitters television recep tion channels 4 66-72 MHz 5 76-82 MHz general television station trans mitter output power excess 1 kilo watt Therefore ratio between model transmitter signal television transmit ter signal over 30 dB date have no recorded cases interference tele vision reception caused radio control models seven channels currently used 72-76 MHz Proposal 22 The Academys request additional mo bile service spectrum use frequency phase modulation well amplitude modu lation control models does have merit Therefore Commission proposes amend its Rules make available band segments 720-73fl 754-76fl MHz permit both amplitude frequency phase modulation control models accordance proposed rule changes outlined Appendix Editor Copies Appendix NPRM available free MA HQ Please include pre-oddressed No 10 size business envelope postage affixed get immediate attention note outiside lower left corner en velope AMA HQ NPRM Appendix 23 In addition footnote NG49 sec 2106 we now also including mobile service allocation column 8 bands 72-73 754-76fl MHz reflect actual use frequency bands parallels fixed service allocation both coyered footnotes NG1 NG3 includ ed Table Footnote NG49 also being amended specifically reflect its current pri mary status 72-73 75A-760 MHz band action simply editorial nature Regulatory Flexibility Act 1980 Initial Analysis 24 Reason action proceeding response petition rule making request ing additional spectrum radio control models 25 The objectives Commission desires comments proposal provide ex panded access 72-76 MHz band radio control models 26 Legal basis action proposed fur therance Sections 4i 303r Communications Act 1934 amended permits Commission make such rules regulations inconsistent law may necessary execution its functions additional view public welfare 27 Descriptions potential impact num ber small entities affected Implementation proposed rules would provide spectrum relief licensees perceive no ad verse impact other licensees mainly individuals engaged radio con trol models present over 200000 valid licenses force could pos sibly increase radio control equipment sales well sales models using radio equipment 28 Recording record-keeping other com pliance requirements No additional require ments would imposed proposed rule changes adopted 29 Federal rules overlap duplicate conflict proposed rules None 30 Any significant alternatives minimizing impact small entities consistent stated objective None 31 In accordance requirements Regulatory Flexibility Act 1980 PL 96-354 19 September 1980 Section 603a Secretary directed transmit copy initial analysis Chief Counsel Advocacy Small Business Administra tion 32 Authority issuance Notice contained Sections 4i 303r Communications Act 1934 amended 47 USC 4i 303r Pursuant proced ures set out Section 1415 Commis sions Rules Regulations 47 CFR 1 A15 interested persons may file comments before May 13 1982 reply comments before May 28 1982 relevant timely comments will considered Commission before final action taken proceeding reaching its decision Commission may take account informa tion ideas contained com ments provided such information writing indicating nature source such information placed public file provided fact Commis sions reliance such information noted Report Order 33 In accordance provisions Sec tion 1419 Commissions Rules Regulations 47 CFR 1 A19 formal partici pants shall file original five 5 copies comments other materials Par ticipants wishing Commissioner have personal copy comments should file original eleven 11 copies Members general public wish express interest participating informally may submitting 1 copy com ments given same consideration regardless number copies submitted documents will available public spection during regular business hours Commissions Public Reference Room its headquarters located 1919 M Street NW Washington DC 34 For purposes non-restricted notice comment rulemaking proceeding mem bers public advised ex parte contacts permitted time Commission adopts notice proposed rule making until time public notice issued stating substantive disposition matter considered forthcoming meeting until final order disposing matter adopted Commission ever earlier general ex porte presenta tion written oral communication other formal written commentslplead ings formal oral arguments between person outside Commission Com missioner member Commissions staff addresses merits pro ceeding Any person submits written ex porte presentation must serve copy presentation Commissions Secre tary inclusion public file Any per son makes oral ex porte presentation addressing matters fully covered previously-filed written comments proceeding must prepare written summary presentation day oral pres entation written summary must served Commissions Secretary clusion public file copy Commission official receiving oral presen tation ex porte presentation described above must state its face Secretary has served must also state dock et number proceeding relates See generally Section 11231 Commis sions rules 47 CFR 11231 35 For further information concerning pro cedures follow respect rule Continued page 129 40 Model Aviation TABLE 1 Number Radio Control Radio Service licenses force year end figures YearNo Licenses 196630300 196735695 196831721 196932600 197037598 197139094 197239514 197337736 197436774 1975533251 197686916 19771569012 1978191577 1979214314 1980226364 1981219387 Notes 11n March 1975 license fee reduced $2000 $400 21n January 1977 license fee eliminated hpxE Vmph527CD X Eq 6 must know hp propeller absorbingthe effective poweroutput engine approximate efficiency propeller can attain indicated V latter will vary substantially P/D 16 x 4 being capable about 67% maximum 9 x 7 being able reach about 85% maximum CD will vary greatly depending type aircraft involved can low 0025 up probably high 007 5 heavy slow flying biplane flat cowl lots wing struts wires wire-spoked wheels etc S should easy determine point illustrate much detail information needed calculate flight speed accurately Obviously get close multiplying pitch x rpm x efficiency will accident painless type Eq 6 can however used accurately quantify effect changing parameters involved leaving others fixed will close example involving E Lets suppose observed 11 x 694 propeller flight P real good power plant tuming 15000 rpm time J would 08 x 063 0504 actual V would about 115 fps or784 mph Fig 1 can determine F would about 077 Recognizing propeller operating higher-than-optimum angle attack wish change propellers P pitch reduced d must increased preserve hp net effect J will also decrease about 045 Fig will no longer valid since pitch angle will reduced FCC NPRM Continued aqe 40 making proceeding contact Donald Draper Campbell FCC Office Science Tech nology Spectrum Planning Branch Washing ton DC 20554 telephone 202 653-81 77 Federal Communications Commission William J Tricario Secretary Note 1 26 October 17 November 12 De cember 1979 Note 2 end Academy applied experimental license Part 5 19 August 1980 file number 8272-ER-PL-8o operate four 900 MHz frequencies An experimen tal license KK2XFz issued 28 Janu ary 1981 Note 3 26995 27045 27095 27145 27195 27255 MHz latter frequen cy shared other services Note 4 7208 7216 7224 7232 7240 7296 7564 MHz Continued page 132 SERVO GARD SERVO GARD mon bone fhght battery peck voltage well radio signal received transmitter cod reneiver malfunction detected part system SERVO GARO reduces throttle automatically ample time before battery failure safely land model SPECIFICATIONS Size unit installed KPS-14 servo case easy installation Just plug throttle servo output Weight Approx 1 oz Sensitivity Accurate within 02 Volts Servo Pulse Unit shipped positive pulse systems negative pulse available upon request SERVO GARD comes complete pro-wired pigtails servo connectors choice installed specify connector type orderl SEE YOUR DEALER OR ORDER DIRECT DEALER INOUIRIES IN VI TED Price $3795 Postpaid ISpecify connector typo positive negative pulse orderingl ENDORSED BY THE SPIRIT OF AMERICA SHOW TEAM LIMA OHIO R F Enterprises 106 N Main St Arlington OH 45814 419 365-5360 July 1982 129 Equating Eq 4a Eq. 5 solving y new efficiency curve will somewhat givesleft curve Fig 1 E J will beGet install don t take off about080 andthenewVwillbewithout Ken Willard RCM 6x 7841013 x 784 slight further increase V would result reduced slip stream velocity Such small change would justified desire squeeze last drop performance Out power plant engine plus propeller close hoped points have made clearly Take propellers complicated exciting further hoped article will enable respond definite yes answer asked question title truly BIG PuTS S-2A want superb 135 scale biplane kit features easy-to-build Snap-Lock construction numbered die-cut hand-machined balsa hardwood parts vacuum-formed cowl wheel pants clear windscreen neces sary hardware color decals full-size plans photo building guide radio installation directions List Price$32995 E&R Price$21995 BELLANCA DECATHLON top quality kit Pilot has wingspan 96/3 1519 sq area 60 long Kit features numbered die-cut hand-machined parts pre-cut window 3-dimensional instrument panel fullsized plans photo building guide pre-formed cowl wheel pants plus much List Price$30495 E&R Price$22995 NEW Bellanca Decathlon 40 same /4-scale kit above smaller has wingspan 67/4 774 sq wing area designed fly 40- 60-size engine List Price$13995 E&R Price$10695 FUTABA 6-FP-6FN radio complete standard charger including ERR special heavy-duty /4-scale pack age includes 4 large servos produce 154 oz torque 1 standard S-26 servo use throttle control also include heavy-duty 1800 MAH battery pack List Price$46990 E&R Price$32999 R R 1 Box 10 ______ Edgeley ND 58433 701/493-2015~obbieS PRODUCTS Complete Line Exhaust Systems * Tuned Pipes * Muffled Tuned Pipes * Headers * Venturi Mufflers * Expansion Mufflers Helicopter Ball Mufflers ialized Exhaust Systems Unsurpassed Worh~ h Pqrformance Nate 5 7208 7224 7240 7564 MHz Nate 6 See sec 2106 Commissions Rules Nate 7 NG49 following frequencies may autharized low-power 1 watt input mobile operations radio services shown subject condition no inter ference caused reception television stations operating channels 4 5 Manufacturers Radio Service MHZMHzMHzMHZMHZ 7202 7210 7218 7226 7234 7204 7212 7220 7228 7236 7206 7214 7222 7230 7238 7208 7216 7224 7232 7240 Special Industrial Radio Service Manufacturers Radio Service Railroad Radio Service MHz MHz MHz MHZ MHZ 7244 7252 7260 7548 7556 724d 7256 7544 7552 7560 Nate 8 NG56 Th frequencies 7208 7216 7224 7232 7240 7296 7564 MHz may authorized low power 1-watt put mobile operations Personal Radio Services radio control models subject condition interference will caused remote control industrial equip ment operating same adjacent fre quencies reception television stations operating Channels 4 5 TV terference shall considered occur ever reception regularly used television signals Impaired destroyed regardless strength television signais distance television station Note 9 No doubt reason Academy has requested access band segment 7586-7600 MHZ Bell XP-77/Berliner Continued paoe 44 tough would switch materials probably would have quit spot late June design gross weight up pqfl performance ysrem TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN KAB SUPER POSY THINNER K&B SUPER POSY PRIMER K&9 SUPER FOXY PAINT K&B MIXING CUPS 3650 lb still within plans Arnolds formula high wing loading would mean such long takeoff run decided cut structure gross weight 3000 lb Already price tag up $700000 end sight January 1943 six airplanes supposed have delivered Bell told Air Corps serious complications arisen efforts build high-speed airplane wood aiming July delivery first airplanes others end year schedule almost year off cost project up S2 million Bell blamed slippage need sub contract wood construction companies werent already loaded work troopcarrying gliders major friction tween Bell its subcontractors matters quality inspection working drawings top off Ranger engine having cooling troubles May 1943 serious thought given dumping entire XP-77 project because Bell couldnt concentrate- enough effort company too busy its P-63 Kingcobra very secret P-59 Airacomet jet flown first time October 1942 Finally Air Corps decided cancel thing first two prototypes felt would useful obtainingvaluable flight data type plywood aircraft troubles came light Bell stopped inspecting production factory Goshen Indiana Veneer Co building wings Air Corps help Bell discovered Goshen built set test wings no flight wings November 1943 Vidal Research Corp built both 132 Model Aviation scale Pitts S2A Pilot Kit Scale Flight u-uzu GEARED PROP DRIVE Swing Big Prop Realistic RPM Its she2 Ooncs Piop $1950 eKII-107 Con Pee Wee 020o 020 ,II sog 7-4 0-4 prOp 4 roabstcJeibcerrt sc4e IligOl KRESS TECHNOLOGY INC 27 Mdi Road IEI 6 11PM Lloyd i-lan,, N V 11743 00 /Ditibot inqokie ore lenited ZONA SAWS The one wood handle good blade Razor #200 $210 Sabre * 400 -$185 Sa100-389 Replacement blades available yosr dealer ModeS SupplyPO Box 3957 A 90510 uSA