Control Line: Navy Carrier

APC Propellers IN THE APRIL issue mentioned recent propeller releases Landing Productsthe competition series APC propellers nine inch diameter pitches 65 75 85 inches Ive since received information Fred Burgdorf describing development production APC propellers differences sport competition propellers APC propellers first described last four Model Propeller Noise articles Vess Heathcoat Nagel appeared December 1989 March 1990 issues Model Aviation articles described mechanisms propellers model aircraft contribute overall noise model aircraft primary observations researchers Power Bob Ritzs Guardian McCoy 60 spring-ioaded throttie coupied intake baffie weii throt tie operated single ilne through system pulisys Suction fuei system Some older engines past Carrier modeis Anyone iew 1 960a early 1970s should have no trouble identifying younger readers clockwise top Rossi 60 Fox 59 McCoy 60 APC propeiiers Landing Products main subject month new competition series propeiier 9 x 65 size appears between two Sport series props revised biade shape enlarged hub Competition prop apparent 50 Model Aviation [Lx Navy Carrier Dick Perry 6739 Stonecutter Dr Burke VA 22015 ABSTRACT months column contains formation about new competition series APC propellers some discussions about Carrier earlier years request information east coast Carrier fliers Grumman Guardian fiown Carrier competition before advent dispisoement ciasses belonged Bob Ritz predates Stoning Guardian kit J-Roberts bellcrank detail went model finish markings example us aii Continued page 181 CL Navy Carrier/Perry Continued page 50 1 Propellers predominant source noise model aircraft effective mufflers 2 Torque noise prominent type propeller noise 3 reason torque noise high because model propellers very inefficient turning torque engine output thrust final article described APC propellers cited quiet operation point research no measurements taken APC propellers because available research begun however tested subjectively compared other propellers part research results although quantified showed APC propellers significantly quieter Certain APC propellers also produced higher flight speeds achieved other propellers same models engines performance increase surprising considering low noise levels APC propellers quieter propeller turns less torque noise leaving torque convert thrust Propeller design procedures basically unchanged Wright brothers through 1960s Improvements performance result experimentation theoretical analysis has since development computational fluid dynamics computers support propellers could designed tested benefit wind tunnels experimental flight tests Model propellers have evolved much same way Propeller developments have largely result trial error Commercial propeller designs have often dictated production limitations carving wood props economics having start SCRATCHBUILD 14 SCALE PLANS span sheet price CESSNA AGWAGON123-54~S60-OO CESSNA U206TU206107575nrS6500 CESSNA 152 AEROBAT99573uS5S0O PIPER PAWNEE10874nS60O0 TRANSA VIA AIRTRUK117875nS65OO EDO FLOATS5872n5390O EDO AMPHIBFLOATS 613~S49-00 Add 40Z Surface Mail P & P VISA & MASTERCARD Welcome r OONO FIZRHOO FOR COMPLETE LISTING OF ALL PLANS BOORS PROSUCTS SERTICRO FREE WITH ALL ORSERO wood prop theoretical arbitrary pitch distribution design master casting synthetic propeller Landing Products took different approach using computer-aided design manufacturing CAD/CAM techniques computer program uses very carefully chosen mathematical descriptions propeller shapes descriptions sufficiently general nature allow high design flexibility sacrificing desirable aerodynamic characteristics mathematically defined shapes design program converted commands direct numerically controlled milling machine makes production molds process typical 1 1-in-diameter propeller requires about seven hours computer time compute control commands another seven hours machining produce molds tests Vess et al demonstrated propeller efficiencies generally less 50% ie less half engines power making thrust rest consumed noise other losses improvement possible could readily deduced full-scale propeller efficiencies can top 85% Vess tests measured actual efficiencies over range operating points have similar data APC propellers subjective performance comparisons reduced noise levels point significantly improved efficiencies APC propellers first introduced APC propellers sport series designation B 11 cast hub B-ll props designed have optimum pitch airfoil over very large portion blade B-l 1 propellers rapid transition hub optimum blade airfoil within about inch radius center 9-in-diameter propeller early design experienced some failures field conditions propellers have replaced sport series C-2 design C-2 propellers significantly stronger original APC propellers latest iteration APC propeller Continued page 182 IfTRAU u ULTRA WINGMAN Glow Plug Driver ometer ust GasTemperature Indicator e Expanded-Scale Voltmeter Flight Check Flight Select bel Meter e Timer Modes Pattern Select ent Temperature ULTRA WINGMAN $20000 Includes Unit cable battery pack charger Helicopter version$21000 Airborne-Sensor Pack$4000 CONVENIENT The Ultra Wingman achieves multiple tunctions such Glow Plug driver Exhaust Gas Temperature indicator Tachometer Expanded Scale Voltmeter through connection model airborne-sensor pack approx 1 ounce easily installed drilling halt inch hole tuselage routing tour leads appropriate positions SAFE The Ultra Wingman otters sate ig nition ot glow plug well simultaneous reading ot RPMs Exhaust Gas Temperature through single connection sately distanced trom prop same connection frequent receiver battery pack checks made easy Ultra Wingmans loaded digital Expanded Scale Voltmeter Pre-Flight Check list provided help assure sate preparation operation ot model ECONOMICAL The Ultra Wingman ot ters ten distinct tunctions compact hand-held unit Actual size 4 73/418 cable SALES & CUSTOMER SERVICE Z 5455 LINGER LONGER ROAD CUMMING GA 30130 August 1991 181 BO SCAT NEW ZEALAND AERO PRODUCTS 34 WARS PARADE STIRLING POINT RLOFF NEW ZEALAND ill GAIN ONT1tOL~71 Losing control can nightmare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical in-house radio service can depend Radio South customer satisfaction isnt just mono Its way life Let us put back control Futaba Knr 5524 N Palafox Pensacola FL 32503 repair information 904 434-0909 1-800-962-7802 Toll Free Order Line lOrders Only Please Natural resonant frequencies also considered designed higher anticipated operating speed resulting propellers designated D- 1 sold competition series As accompanying photographs illustrate D-l propellers have blade area inboard 65 70% diameter enlarged hub comparison between 9 x 7 C-2 sport prop 9 x 75 D-1 competition propeller shows D- 1 able absorb 70% power 15% higher rpm produce 40% thrust same internal stress propeller blade APC propellers molded longfiber composite material has over double strength unreinforced nylon 25 30% stronger glass-filled nylon shorter fibers resulting propeller very stiff stiffness improves performance also increases stress blade subjected shock loading such hitting deck landing Prudence would dictate replacing propeller after arrested landing least thoroughly inspecting before using again advice valid propeller just APC Landing Products As being written have yet complete muffler-equipped practice model use club Northern Virginia Control Line Association flying field Test results comparing APC props other propellers commonly used Carrier will have wait next installment column Nostalgia model engine photos month Ron Duly Burbank California Ron active Navy Carrier quite now renewing activity event won Class II Riverside California NATS 1977 first recipient Eugene Ely Award outstanding Navy Carrier flier Riverside started flying Carrier 1967 Sturdi-Built AM-i Mauler McCoy 60 Mauler kit could MEYS HI TECH HOBBY INC White Pond Rd Stormville NY 12582 Introduces. AcuScaleAccu rately Scaled R/C Aircraft Plus Full Line Hobby Shop Supplies 110 Scale A6 Intruder 1/16 Scale B-17 Electric Span 636 Length 655 ht 9 11 lbs Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers chable Wings Vacuformed Canopy Moch Morel Uses Dynamax Faa72 1090 Size Engine Intro Price35O Span 7175 Lengtb 56 Convened Gas Fiberglass Fuse Cares w/Mnlded Fiberglass Skins Precut Farmers Vacuformed Cowlings Much 4/05 Motors Intro Price425 purchased about $1500 back three engines have quite history Rossi Bill Johnson fuel meter exhaust slide Rons engine 1977 NATS could easily top 120 mph good dayprobably still can McCoy 60 probably popular engine since beginning Carrier flying used beginning having started out ignition engine 1940s 65 displacement limit established Class split off littles Carrier models McCoy still going strong Class II engine particular engine also fitted Johnson meter slide belonged long time Carrier Hobby Horn hobby specialties MIDWAY MODEL C2 Old Timer Kits R/C AND FF Hobby Horn discount prices MMC FULL KITS listed Full Kits include cut parts plan strip sheet wood wire window material Kits marked have wire landinear pre-bent $6799 1938 R4jehou5e SO" $3596 1937 Lon Cabin 70 $4952 1939 U Sporlster 50 s3596 1937 Quaker Flash 6T 4784 1940 Buzzard Bombshell 50 span kit 3590 1937 Air Chief Si 3776 1940 New Ruler 74 1939 Thermic 100 Glider 100 Span Old Yirner 7472 Sailplane--modifications shown RIG $8623 P & W MODEL SERVICE Old Timer kits FF R/O following discount p rice full kits full kits clude cut parts plan stick sheet wood wire windshield material 1935 Miss America 84$7556 1936 Buccaneer 84$6296 1937 Dallaire 108$7992 1938 Clipper Mk 172$5596 1938 Kloud King 63$4440 1938 Powerhouse 84$5624 1938 Record Breaker 96$7304 1930 Trenton Terror 72$4280 1939 Korda wake 44$2012 1939 Mercury 72$6128 1939 Zipper 54$5624 1940 Ranger 48$3355 1940 Saillane 70$8900 1940 So Long 50$3168 1941 Brigidier 56$4279 1941 Super Quaker 78$7640 1941 Playboy Jr 54$3272 1941 Playboy Sr 78$5372 1941 Brooklyn Oodqer 56$4448 250 $2 pp/lst Class free $ 01 $2000 adrequested 1st order 8 4 82 Page 1991 CATALOGUF $300$2001to$45 add 375 $4501 $7000 add $500 bb Horn $7000 add $425 Oe 15173 MO STIAI Calif add 600%tax Send BOX 2212 MO VISNMC # & ExplowESTMINsTERCA 92684 checksHours Mon-Fri 9AM 5PM Check allow up 30 714 893-83llPhone days clearance 714 895-6629 FAX 182 Model Aviation Coming Soon. Electric -130 tric OV-1 OA Bronco r Etendard Duct Fan a A-37 Duct Fan Call 914 878-75239am 3pm est 914 279-32704pm 8pm est modeler Roland Baltes models appeared April 1991 column Fox 59 its intake throttle used early Carrier pioneer Bill Netzband shown another engine would pretty well round out field 1960 early 1970s Carrier rear intake SuperTigre G65 its flat piston directional porting also quite good engine saw quite evolution iron/steel piston liner plastic rotor ABC construction steel rotor finally Perry Directional Porting introduced just Schnuerle porting becoming popular earlier loop-scavenged engines produced lot torque lower speeds current crop Schnuerle engines could probably still hold own Carrier circles especially higher pitch propellers now available other advantage over current 65sthey about quarter pound lighter Grumman Guardian belonged late Bob Ritz McCoy 60 pre Roberts throttle mechanism consisting single steel line routed around pulleys actuating spring loaded exhaust baffle stovepipe-damper type intake throttle model used suction fuel system Ive giving little thought Carrier event revive older models nat available yaar habbtl shap ORDER DIRtCT tar immediate shipment Check MO iliaa MC ar COD accepted Add $250 tar LIPS $300 tsr COD 6/o sales tan far Calif residents engines would use pre-1976 rulesmuch like Old-time Nostalgia Stunt events popular Id interested hear thoughts such event enough interest no serious detractors Ill put together some rules suggestions future column Let know what think Virginia Area Carrier Interest has quite since Carrier events flown Winston-Salem North Carolina quite long since last Carrier contest Norfolk Virginia know few newcomers Carrier events Virginia Maryland well few flew Carrier days past have inquires few areas east coast about Carrier interestmost recently William Davis Winston-Salem would like organize Carrier contest Washington DC area common question What kind participation would help answer question Id like hear east coast Carrier modelers particularly Maryland New Jersey Pennsylvania Virginia West Virginia North South Carolina Let know address give idea far would drive attend contest Continued page 184 Snuf-Vibe BACK PLATE MOUNTS Front Intake Engines Aluminum Back Plate Mounts ar light weight easy install Just bolt engine crank case mounts equipped SNUF-ViBE isoiation system double protection engine vibration SIX SIZES FOR ENGINES 15 TO 182 JT-BPI 09 15 1496JT-BP4 60 901496 JT-8P2 19 26 1496JT-6P6 MAX 90-1081795 JT-6P3 29- 056 1496JT-9P6 ST2SOO-30002196 -gzi SEND 251 STAMPmhw FOR ADDITIONAL INFO AND JIEC tATALOG164 School St Daly CIty CA 94014 14161 7563400 SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Foal $495 pIus 10% Subtotal Continental US UPS Neat Day Air $1400 plua $1 00 per lb Shipment total 000 add $395 Foreign Ordera Parcel Post Air $495 * 20% Subtotal US Mail $495 plus 10% Subtotal August 1991 183 PRECISION MODEL PRODUCTS iZJ gsA Made U S BARSTOCK ALUMINUM SPINNERS Part NoSize 11-150-B 2 T1-175-B1-3/4 11-200-B 2 TT-225-B2-1/4 TT-226-B 4 FAt . 11-250-B 2 11-251-B.2-1/2FAI . 11-275-B2-3/4 T1-276-B2-3/4 FAt 11-300-B3 11-301-B3FAI 11-325-B3-1/4 TT-350-B3-1/2 TT-375-B3-3/4 TT-400-B4 RetailApprox PriceWeight S1395 .. 058 oz 149509502 1595 10002 169516002 1895.15002 1895 02 2095170 oz 2295 --22002 2495200 02 2695 . -26002 2895. 25002 3695- 34002 499547002 5995- 520ox 69 95 . . 570 07 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $3 00 Per Spinner PROP NUT ADAPTORS V 0 Part No Size 11-140-A . 8 11-147-A1/4-28/7mm IT-610-A6 x 1 0mm TT-710-A7 x 1 0mm TT-516-A5/16-24 TT-518-A5/16-24/8mm TT-810-A8 x 10mm TT-825-A . 25mm TT-375-A -24 11-125-A x 125mm pp too Weight 061 02 061 07 063 ox 082 02 076 02 076 02 076 02 075 02 117 02 115 02 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 will make list names addresses available anyone thinking about organizing Carrier contest Perhaps through better communication can bring Carrier flying back central east coast regionLI Flying Fun/Mathews Continued page 105 super careful frequency control rules place list detailing has what frequency circulated minimize duplications group meets formally once year envy area long waiting list membership kept waited three years admitted after unfortunate death members Normally openings occur someone moves away Wichita some utopian flying field obtainable rich just plain old bunch dedicated fliers hauled off solved problem own begging some city council board directors help Sure its bit cosfly flying park someones guest compared other outdoor activities its actually bargain Considering costs involved some jerk shoots out air crowded public facility get tangled mid air student place cheap would seem approach viable fliers way develop secure flying site over have control constant worry potential eviction Perhaps should get rid mind set someone owes us place fly ourselves GHQ Several mentions made previous RC Old Timer columns concerning truly ghastly reputation pre- post-war GHQ engines things available throughout war no other manufacturer production sold little $395 making 184 Model Aviation Retail Price S495 495 495 4 95 4 95 495 495 495 595 595 Continued page 186 Satisfaction Guaranteed EAv HINGE 5H710 Pkg 24 $295 THE HIGH-TECH HINGE DESIGNED FOR THE CYANOACRYLATE AGE Easier install other hinge No gouging picking messy epoxies Simply cut single knife slot hinge slide hinges place apply few drops favorite CA glue youre donel SUPER FAST SUPER EASY SUPER STRONG _ _ MFG CO INC.401-7 So Front St.Montezuma IA 50171 623-5154 Serious Horsepower1 0S ST VS Rossi & Webra Parts Service Custom Engines Accessories Dave Shadel Performance Specialties yJWi $1 DOfor fully illustrated catalog Available VS Long & Short Stroke OS Long Stroke 05 6IFSR 05 40 VRP/VF 0S 91 VRDF STX-40 Rossi 40 coming soon information Call 619 729-1658 Hours 10 am 5 pm Monday Thursday P 0 Box 3146 nerville NV 89410 attractive youngsters buying first gas engines Ive often wondered young people disappointed GHQ lost modeling forever Strangely responses reports have substantiated bad reputation Ive actually some good things say about power plant Hugh Black Bucyrus Ohio wrote Just let know GHQs bad everyone said over years have right now runs pretty good think should moderate comments Clarence Lee RCM extremely wide production tolerances made GHQ almost impossible average fellow run Stu Richmond Model Builder modifications porting good rework some modelers have able run GHQs John Wormly Savanna Georgia GHQ first engine did run some miracle didnt lose finger huge rough-cast aluminum prop Im surprised disappointed some enthusiast hasnt offered reproduction Id sure like have runs well Don Tyler Sanford Florida Zipper quite some time did buy prop made ita reverse pitch ighten bolt time ran Later got used Bunch Midget what difference Franldy hated damn thing made much noise Brown Ohlsson Wish still it would make great door stop Notice examples above repeated mention huge heavy factory-sold aluminum props reverse rotation Ive seen few reworked GHQs run always 4 volts huge props would seem some ran some rather poorly some rather well So can Perhaps short note received Max Faltelson San Antonio Texas can shed some light worked GHQ during 1938 1939 making engines naturally owned engines wide variances running because wide variances manufacturing After extensive rework got run very well Heres what did Honed out cylinder bore Removed webs flash Chromed piston fit cylinder Honed crankshaft bearing Chromed shaft fit bearing original engine designed manufactured sold Pete Loutrel Brooklyn New York company bought out engine re-designed built sold cheaply Loutrel sold $100 complete $75 kit $35 castings should give some idea much cheapened Well no wonder some ran some didnt Thanks Max input MORE NAVY NATS STUFF April column recalled some feel old National Championships however nothing can come closer photo sent Fran Ptaszkiewicz Towanda New York color print made color slide some blue has lost dye faded slide passing youve looked old Kodachrome slides years may suggest get transferred videotape ASAP Notice photos much shine wings of models younger guys information heat shrink material its silk lots lots clear dopelike 20 coats hand rubbed Now workmanship dying art Continued page 188 ADVANCED AERO PRODUCTS VS & OS SIMPASS ISO EXHAIST SYSTECALL XX WRITE FOR IWCRIAATB ma tOR NOAIEX MITtEN NRIAAFT AND ULTEBAS Set ADVANCEX AERO PJCTS Ru BOX 6-C ARRA TX 75003 714 9IT4-3R4X Learn fly planes private field Five 6 day course $350 Open year round Send SASE complete info Southwest RO Flying 2818 Carolina NE Albuquerque NM 87110505-832-6394 e I3000PIUS1XXXX3-NWWXhNXOSI Icolor OTO PAAKSIncluing KOKUFAN 186 Model Aviation 209 645 5535 GOLDEN GATE HOBBIES PO BOX 27001 FRESNO CAUFORNIA 93729 M/C VISA OR COD HA TORI RA DICICON IMMSK HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4FT $ 5 WE WANT NEW DEALERS ! HATORI 650 LONG PIPE $4350 TO DEALERS CATALOG $ 200 OR FREE Will-I ORDERS Make Real Decals computer printer Send $800 S/H over 15 sq ft decal materials plus instructions LABCO 27563 Dover Warren MI 48093 well think print will reproduce well enough pick up such interesting detail young fellows working models shop apron sleeping cot front work bench model trailers mix Free Flight Control Line models grasp scope its necessary realize photo shows about third total work bench area letter Fran recalls night flight pulse jet powered Control Line model space between two hangers 1950 Nats Dallas kind neat see glowing tube going round round youve ever heard things run can imagine noise echoing off two adjacent hanger walls landed asked cease desist because lateness hour area flying did course Also remember two stunt models tied tail-to-tail involved engine tug war see engine powerful Jim Walker doing ceiling walker glider routines hanger manner tricks Incidentally Fran source reprints old deBolt kit plans contact him 23 Marlee Drive Towanda New York 14150 information EDCO GYRO PLANS Through kindness Frank Zelinka Coral Gables Florida now have enough way drawings pursue Control Line gyro mentioned last column Frank writes dad Nick saw fly sometime around 1951 immediately bought kit built Frank born 1953 dad taught him fly control line time five Frank took third Nationals Jr/Sr Stunt six deBolt American powered a Johnson 35 dad decided fly gyro Bullet 29 Like would fly After let go would run along ground sometimes cutting circle would have run away fool thing avoid being hit As several readers have pointed out although instructions did mention way get gyro fly give blades vigorous spin before releasing model Once done flew well simply enough slip stream effect drive rotors otherwise Ill keep posted get farther project ANOTHER OF THOSE WEIRD COINCIDENCES sorts things keep happening get really goose bumpy Heres another planning use photos enlarged Astro Hog months column mention connection Bruce Daugerhty Astro Hog old control line DI-Doe Along comes May issue lo behold George Aldrich has three view some information DI-Doe Welcome twilight zone DDC name firm kitted DI-Doe gentlemen responsible Bruce Daugerhty Fred Dunn Herb Considder Dunn moved Ohio California developed Astro Hog swept top four places 1958 Nats II NNXJVAJr WE MQIXBI. PcJJcT PRFFNTS THE NORTH AMERICAN F~1Th 1ffTTTANrc IPRICE KIT rt FLEX I-GLASS FUSE * MACHINE CUT WINGS * MACHINE CUT STABS * ALL BUMPS & BLISTERS * 5 VIEWS & PLANS * CLEAR INSTRUCTIONS * GENEROUS HARDWARE PKG * CARBON FIBRE SPARS * ALL VACUFORMED PARTS * CLEAR CANOPY * RETRACT LOCATION SHOWN ACCESSOB ES AVA LABLE * STATIC & FLYING SPINNER /PROPS * FULL COCKPIT KIT IMODEL BUILT BY HI-ThU NUIJL bU MELE* BOMBSTANKSPILOT TO ORDER SEND CHECK OR MONEY ORDER TO Free Cockpit kit w/each order $30 value * RETRACTS & STRUTS INNOVATIVE MODEL PRODUCTS INC JUDE IN THE P 0 BOX 4365MARGATE FL 33063 OR CALL 8007803190 USA MODEL SPECIFICATIONS SPANV62SINMASTER CARD & VISA ACCECPTED 3WEIGHT 1SLBS ENGINE 108 2CY 120 4CYADD $2000 SHIPPING AND HANDLING 188 Model Aviation Flag waver! LoRTHEASr SCREEN GRAPHICS 21 FISHER AVE EAST WHGMEADIIW MA O1H2R 42CD QUADRA 41 4CC / 25301 29HP / 4OLBS SPRING STARTER ALUMINUM MOUNT MUFFLER PROPS PLANS SUPERTANKS MUFFLERS FULL LINE QUADRA PARTS & ACCESSORIES SEND $100 FOR COMPLETE CATALOG U S QUADRA RT 1 NEODESHA KS 66757 316 325-2821 FAX 325-2222 TEl 413-525-411R FAX 413-525-719 became legend Wonder George knew also see Georges Up Around photo earlier-mentioned American stunter LITTLE WHITE RIPE little white bipe scratch designed Ultimate modified 4-40 bipe Should say highly modified started 4-40 bipe kit obviously reworked cockpit turtledeck vertical fin swept wings still just 4-40 bipe under skin Im delighted just couldnt resist using photo Early flight testing indicates K&B 45 Sportster absolute top end power curve Im sure would fly very nicely 25 in3 power plant wildly fast full throttle breathtaking vertical performance point exercise no definite decision about publication and/or kitting Nonetheless sure did turn out pretty PHOTOS PLEASE Support RC groups has excellent now need material Free Flighters guys will just get some stuff Ill gladly report sport free flight activitiesD foe Card Page 142 Ea5eo3slasrtt0 N L Y -6 RAFTIRADIO ID LABEL SETS Identify aircraft per AMA safety rules SeIf-ssck labels ease apjOiy permanent Send check tar set $125 plus 45 P&H 52201 sets $490 plus 190 P&H $590 taIsadrsf Enserpises P080515 tree Sods NY 19021 SAMS MODELS SPITFIRE England13 or2G span Europes lead ng F eta F ght & V ntage specialist SAMS 1600 item catalog FREE Send $2 postage SAMS Chapel Sandon Harts SG9 OOJ England NOTE S billsNlSAl Master Card hecks & stamps valid England FF Duration/Murphy Continued page 57 expected relatively low because FAI Team Finals being staged West Coast just couple weeks prior Lawrenceville Nationals FlG Coupe dHiver FIH Al Towline also outdrew sophisticated counterparts FlB Wakefield Rubber FlA A2 Towline considerable margins well Although bolstered good showings two rubber-powered classes FAI events group trailed list category averages 318 entries per event compared 426 entries per event average events category leader AMA Gas 574 entries per event Probably few other national competitions have drawn such evenly distributed event entry numbers such full complement event categories Nationals along AMA FAI schedules numerous SAM Old Timer events six NFFS Nostalgia Gas events offered within five-day session well Obviously events various hi-point award challenges being offered within categories forced contestants make choices about events enter sacrifice simply wasnt enough time fly everything might want days time mention get older get slower subtle development has also noted others frequent large affairs amazing resurgence participation various rubber-powered events past few years popularity obvious perusing numbers charts headed P-30 Mulvihill Rubber relatively new NFFS Nostalgia Gas movement still growing could grow steadier hi-tech materials screaming Schnuerles utilization variable flying surfaces along other gadgetry continues infiltrate influence AMA Gas classes greater degree could Nostalgia Gas events will eventually haven prefer build fly simple machine special Nostalgia Gas Ignition event will probably catch up levels OldTimer Gas Ignition entries before long interest still climbing will no doubt accelerate event approaches official status under Nos Gas umbrella simpler events also head OldTimer category 020 Replica obvious category leader basic OT stick fuselage Rubber events show fine representations entries about equal four events New kit releases vintage designs will surely maintain increase levels participation well add entry numbers together Electric B class would make top 40 charts Electric interest Free Flight has growing about rate trickle charger Midwest least have gone step up one-and-two entrant levels years past seems electric power offers whole different set parameters lot experimentation involved effective results notice serious competitors field have forsaken other events concentrate battery-powered concepts should expect years hence fellows will forefathers power source seems inevitable regardless apparent current apathetic interest other Free Flight competitors would guess future breakthroughs current weight handicaps motors batteries will greatly speed acceptance power alteruative Just will get nuclearpowered models anyones guess Continued page 190 reader-written publication about R/C soaring dedicated sharing technical educational information theory practical application $19 Bulk/Third Class $26 First Class Outside USA Please write RIC Soaring Digest PO Box 6680 Concord CA 94524 August 1991 189 R/C Battery Test V Those apply Sorry cant fly today. forgot charge up last night E I hope didnt cook batteries charged full rate way over 16 hours 0 This should realty last flight Im sure bstteries fully charged [1 I wish could remember name device trickle charges batteries wouldnt have worry about time know tile doesnt require assembly soldering.ifs about size 5 golf-ball 0 Sure can fly today trickle charge RIC system continuously French Trickier! Take worry Out battery charging. trickle charge batteries days weeks avert months Convenient Glow-Light assures trickier doing its job. ready fly anytimell $995 S & H French Electronics Inc P0 Boa 255 Worthington OH 43085 Linquire local hobby shop first ZENOAH SACHS-oOLMAR & QUADRA ENGINES ERCOUPE TOMAHAWK te J3 KIlTEN KITS ZINGER PROPS FUEL TANKS CB WHEELS Carbon-Fiber Arrowahafta Ceconite & Glue OGA & MGA PILOTS Sand $100 catalog JIM MESSERS QUALITY MODEL PRODUCTS Valley View Box 43 Allegany NY 14706 PINSPATCHES Lutan irnIiim Co CUSTOM ENAMEL PINS & EMBROIDERED PATCHES MADE TO YOUR DESIGN 303 667-4940 P0 Box 1615Loveland CO80539

APC Propellers IN THE APRIL issue mentioned recent propeller releases Landing Productsthe competition series APC propellers nine inch diameter pitches 65 75 85 inches Ive since received information Fred Burgdorf describing development production APC propellers differences sport competition propellers APC propellers first described last four Model Propeller Noise articles Vess Heathcoat Nagel appeared December 1989 March 1990 issues Model Aviation articles described mechanisms propellers model aircraft contribute overall noise model aircraft primary observations researchers Power Bob Ritzs Guardian McCoy 60 spring-ioaded throttie coupied intake baffie weii throt tie operated single ilne through system pulisys Suction fuei system Some older engines past Carrier modeis Anyone iew 1 960a early 1970s should have no trouble identifying younger readers clockwise top Rossi 60 Fox 59 McCoy 60 APC propeiiers Landing Products main subject month new competition series propeiier 9 x 65 size appears between two Sport series props revised biade shape enlarged hub Competition prop apparent 50 Model Aviation [Lx Navy Carrier Dick Perry 6739 Stonecutter Dr Burke VA 22015 ABSTRACT months column contains formation about new competition series APC propellers some discussions about Carrier earlier years request information east coast Carrier fliers Grumman Guardian fiown Carrier competition before advent dispisoement ciasses belonged Bob Ritz predates Stoning Guardian kit J-Roberts bellcrank detail went model finish markings example us aii Continued page 181 CL Navy Carrier/Perry Continued page 50 1 Propellers predominant source noise model aircraft effective mufflers 2 Torque noise prominent type propeller noise 3 reason torque noise high because model propellers very inefficient turning torque engine output thrust final article described APC propellers cited quiet operation point research no measurements taken APC propellers because available research begun however tested subjectively compared other propellers part research results although quantified showed APC propellers significantly quieter Certain APC propellers also produced higher flight speeds achieved other propellers same models engines performance increase surprising considering low noise levels APC propellers quieter propeller turns less torque noise leaving torque convert thrust Propeller design procedures basically unchanged Wright brothers through 1960s Improvements performance result experimentation theoretical analysis has since development computational fluid dynamics computers support propellers could designed tested benefit wind tunnels experimental flight tests Model propellers have evolved much same way Propeller developments have largely result trial error Commercial propeller designs have often dictated production limitations carving wood props economics having start SCRATCHBUILD 14 SCALE PLANS span sheet price CESSNA AGWAGON123-54~S60-OO CESSNA U206TU206107575nrS6500 CESSNA 152 AEROBAT99573uS5S0O PIPER PAWNEE10874nS60O0 TRANSA VIA AIRTRUK117875nS65OO EDO FLOATS5872n5390O EDO AMPHIBFLOATS 613~S49-00 Add 40Z Surface Mail P & P VISA & MASTERCARD Welcome r OONO FIZRHOO FOR COMPLETE LISTING OF ALL PLANS BOORS PROSUCTS SERTICRO FREE WITH ALL ORSERO wood prop theoretical arbitrary pitch distribution design master casting synthetic propeller Landing Products took different approach using computer-aided design manufacturing CAD/CAM techniques computer program uses very carefully chosen mathematical descriptions propeller shapes descriptions sufficiently general nature allow high design flexibility sacrificing desirable aerodynamic characteristics mathematically defined shapes design program converted commands direct numerically controlled milling machine makes production molds process typical 1 1-in-diameter propeller requires about seven hours computer time compute control commands another seven hours machining produce molds tests Vess et al demonstrated propeller efficiencies generally less 50% ie less half engines power making thrust rest consumed noise other losses improvement possible could readily deduced full-scale propeller efficiencies can top 85% Vess tests measured actual efficiencies over range operating points have similar data APC propellers subjective performance comparisons reduced noise levels point significantly improved efficiencies APC propellers first introduced APC propellers sport series designation B 11 cast hub B-ll props designed have optimum pitch airfoil over very large portion blade B-l 1 propellers rapid transition hub optimum blade airfoil within about inch radius center 9-in-diameter propeller early design experienced some failures field conditions propellers have replaced sport series C-2 design C-2 propellers significantly stronger original APC propellers latest iteration APC propeller Continued page 182 IfTRAU u ULTRA WINGMAN Glow Plug Driver ometer ust GasTemperature Indicator e Expanded-Scale Voltmeter Flight Check Flight Select bel Meter e Timer Modes Pattern Select ent Temperature ULTRA WINGMAN $20000 Includes Unit cable battery pack charger Helicopter version$21000 Airborne-Sensor Pack$4000 CONVENIENT The Ultra Wingman achieves multiple tunctions such Glow Plug driver Exhaust Gas Temperature indicator Tachometer Expanded Scale Voltmeter through connection model airborne-sensor pack approx 1 ounce easily installed drilling halt inch hole tuselage routing tour leads appropriate positions SAFE The Ultra Wingman otters sate ig nition ot glow plug well simultaneous reading ot RPMs Exhaust Gas Temperature through single connection sately distanced trom prop same connection frequent receiver battery pack checks made easy Ultra Wingmans loaded digital Expanded Scale Voltmeter Pre-Flight Check list provided help assure sate preparation operation ot model ECONOMICAL The Ultra Wingman ot ters ten distinct tunctions compact hand-held unit Actual size 4 73/418 cable SALES & CUSTOMER SERVICE Z 5455 LINGER LONGER ROAD CUMMING GA 30130 August 1991 181 BO SCAT NEW ZEALAND AERO PRODUCTS 34 WARS PARADE STIRLING POINT RLOFF NEW ZEALAND ill GAIN ONT1tOL~71 Losing control can nightmare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical in-house radio service can depend Radio South customer satisfaction isnt just mono Its way life Let us put back control Futaba Knr 5524 N Palafox Pensacola FL 32503 repair information 904 434-0909 1-800-962-7802 Toll Free Order Line lOrders Only Please Natural resonant frequencies also considered designed higher anticipated operating speed resulting propellers designated D- 1 sold competition series As accompanying photographs illustrate D-l propellers have blade area inboard 65 70% diameter enlarged hub comparison between 9 x 7 C-2 sport prop 9 x 75 D-1 competition propeller shows D- 1 able absorb 70% power 15% higher rpm produce 40% thrust same internal stress propeller blade APC propellers molded longfiber composite material has over double strength unreinforced nylon 25 30% stronger glass-filled nylon shorter fibers resulting propeller very stiff stiffness improves performance also increases stress blade subjected shock loading such hitting deck landing Prudence would dictate replacing propeller after arrested landing least thoroughly inspecting before using again advice valid propeller just APC Landing Products As being written have yet complete muffler-equipped practice model use club Northern Virginia Control Line Association flying field Test results comparing APC props other propellers commonly used Carrier will have wait next installment column Nostalgia model engine photos month Ron Duly Burbank California Ron active Navy Carrier quite now renewing activity event won Class II Riverside California NATS 1977 first recipient Eugene Ely Award outstanding Navy Carrier flier Riverside started flying Carrier 1967 Sturdi-Built AM-i Mauler McCoy 60 Mauler kit could MEYS HI TECH HOBBY INC White Pond Rd Stormville NY 12582 Introduces. AcuScaleAccu rately Scaled R/C Aircraft Plus Full Line Hobby Shop Supplies 110 Scale A6 Intruder 1/16 Scale B-17 Electric Span 636 Length 655 ht 9 11 lbs Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers chable Wings Vacuformed Canopy Moch Morel Uses Dynamax Faa72 1090 Size Engine Intro Price35O Span 7175 Lengtb 56 Convened Gas Fiberglass Fuse Cares w/Mnlded Fiberglass Skins Precut Farmers Vacuformed Cowlings Much 4/05 Motors Intro Price425 purchased about $1500 back three engines have quite history Rossi Bill Johnson fuel meter exhaust slide Rons engine 1977 NATS could easily top 120 mph good dayprobably still can McCoy 60 probably popular engine since beginning Carrier flying used beginning having started out ignition engine 1940s 65 displacement limit established Class split off littles Carrier models McCoy still going strong Class II engine particular engine also fitted Johnson meter slide belonged long time Carrier Hobby Horn hobby specialties MIDWAY MODEL C2 Old Timer Kits R/C AND FF Hobby Horn discount prices MMC FULL KITS listed Full Kits include cut parts plan strip sheet wood wire window material Kits marked have wire landinear pre-bent $6799 1938 R4jehou5e SO" $3596 1937 Lon Cabin 70 $4952 1939 U Sporlster 50 s3596 1937 Quaker Flash 6T 4784 1940 Buzzard Bombshell 50 span kit 3590 1937 Air Chief Si 3776 1940 New Ruler 74 1939 Thermic 100 Glider 100 Span Old Yirner 7472 Sailplane--modifications shown RIG $8623 P & W MODEL SERVICE Old Timer kits FF R/O following discount p rice full kits full kits clude cut parts plan stick sheet wood wire windshield material 1935 Miss America 84$7556 1936 Buccaneer 84$6296 1937 Dallaire 108$7992 1938 Clipper Mk 172$5596 1938 Kloud King 63$4440 1938 Powerhouse 84$5624 1938 Record Breaker 96$7304 1930 Trenton Terror 72$4280 1939 Korda wake 44$2012 1939 Mercury 72$6128 1939 Zipper 54$5624 1940 Ranger 48$3355 1940 Saillane 70$8900 1940 So Long 50$3168 1941 Brigidier 56$4279 1941 Super Quaker 78$7640 1941 Playboy Jr 54$3272 1941 Playboy Sr 78$5372 1941 Brooklyn Oodqer 56$4448 250 $2 pp/lst Class free $ 01 $2000 adrequested 1st order 8 4 82 Page 1991 CATALOGUF $300$2001to$45 add 375 $4501 $7000 add $500 bb Horn $7000 add $425 Oe 15173 MO STIAI Calif add 600%tax Send BOX 2212 MO VISNMC # & ExplowESTMINsTERCA 92684 checksHours Mon-Fri 9AM 5PM Check allow up 30 714 893-83llPhone days clearance 714 895-6629 FAX 182 Model Aviation Coming Soon. Electric -130 tric OV-1 OA Bronco r Etendard Duct Fan a A-37 Duct Fan Call 914 878-75239am 3pm est 914 279-32704pm 8pm est modeler Roland Baltes models appeared April 1991 column Fox 59 its intake throttle used early Carrier pioneer Bill Netzband shown another engine would pretty well round out field 1960 early 1970s Carrier rear intake SuperTigre G65 its flat piston directional porting also quite good engine saw quite evolution iron/steel piston liner plastic rotor ABC construction steel rotor finally Perry Directional Porting introduced just Schnuerle porting becoming popular earlier loop-scavenged engines produced lot torque lower speeds current crop Schnuerle engines could probably still hold own Carrier circles especially higher pitch propellers now available other advantage over current 65sthey about quarter pound lighter Grumman Guardian belonged late Bob Ritz McCoy 60 pre Roberts throttle mechanism consisting single steel line routed around pulleys actuating spring loaded exhaust baffle stovepipe-damper type intake throttle model used suction fuel system Ive giving little thought Carrier event revive older models nat available yaar habbtl shap ORDER DIRtCT tar immediate shipment Check MO iliaa MC ar COD accepted Add $250 tar LIPS $300 tsr COD 6/o sales tan far Calif residents engines would use pre-1976 rulesmuch like Old-time Nostalgia Stunt events popular Id interested hear thoughts such event enough interest no serious detractors Ill put together some rules suggestions future column Let know what think Virginia Area Carrier Interest has quite since Carrier events flown Winston-Salem North Carolina quite long since last Carrier contest Norfolk Virginia know few newcomers Carrier events Virginia Maryland well few flew Carrier days past have inquires few areas east coast about Carrier interestmost recently William Davis Winston-Salem would like organize Carrier contest Washington DC area common question What kind participation would help answer question Id like hear east coast Carrier modelers particularly Maryland New Jersey Pennsylvania Virginia West Virginia North South Carolina Let know address give idea far would drive attend contest Continued page 184 Snuf-Vibe BACK PLATE MOUNTS Front Intake Engines Aluminum Back Plate Mounts ar light weight easy install Just bolt engine crank case mounts equipped SNUF-ViBE isoiation system double protection engine vibration SIX SIZES FOR ENGINES 15 TO 182 JT-BPI 09 15 1496JT-BP4 60 901496 JT-8P2 19 26 1496JT-6P6 MAX 90-1081795 JT-6P3 29- 056 1496JT-9P6 ST2SOO-30002196 -gzi SEND 251 STAMPmhw FOR ADDITIONAL INFO AND JIEC tATALOG164 School St Daly CIty CA 94014 14161 7563400 SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Foal $495 pIus 10% Subtotal Continental US UPS Neat Day Air $1400 plua $1 00 per lb Shipment total 000 add $395 Foreign Ordera Parcel Post Air $495 * 20% Subtotal US Mail $495 plus 10% Subtotal August 1991 183 PRECISION MODEL PRODUCTS iZJ gsA Made U S BARSTOCK ALUMINUM SPINNERS Part NoSize 11-150-B 2 T1-175-B1-3/4 11-200-B 2 TT-225-B2-1/4 TT-226-B 4 FAt . 11-250-B 2 11-251-B.2-1/2FAI . 11-275-B2-3/4 T1-276-B2-3/4 FAt 11-300-B3 11-301-B3FAI 11-325-B3-1/4 TT-350-B3-1/2 TT-375-B3-3/4 TT-400-B4 RetailApprox PriceWeight S1395 .. 058 oz 149509502 1595 10002 169516002 1895.15002 1895 02 2095170 oz 2295 --22002 2495200 02 2695 . -26002 2895. 25002 3695- 34002 499547002 5995- 520ox 69 95 . . 570 07 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $3 00 Per Spinner PROP NUT ADAPTORS V 0 Part No Size 11-140-A . 8 11-147-A1/4-28/7mm IT-610-A6 x 1 0mm TT-710-A7 x 1 0mm TT-516-A5/16-24 TT-518-A5/16-24/8mm TT-810-A8 x 10mm TT-825-A . 25mm TT-375-A -24 11-125-A x 125mm pp too Weight 061 02 061 07 063 ox 082 02 076 02 076 02 076 02 075 02 117 02 115 02 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 will make list names addresses available anyone thinking about organizing Carrier contest Perhaps through better communication can bring Carrier flying back central east coast regionLI Flying Fun/Mathews Continued page 105 super careful frequency control rules place list detailing has what frequency circulated minimize duplications group meets formally once year envy area long waiting list membership kept waited three years admitted after unfortunate death members Normally openings occur someone moves away Wichita some utopian flying field obtainable rich just plain old bunch dedicated fliers hauled off solved problem own begging some city council board directors help Sure its bit cosfly flying park someones guest compared other outdoor activities its actually bargain Considering costs involved some jerk shoots out air crowded public facility get tangled mid air student place cheap would seem approach viable fliers way develop secure flying site over have control constant worry potential eviction Perhaps should get rid mind set someone owes us place fly ourselves GHQ Several mentions made previous RC Old Timer columns concerning truly ghastly reputation pre- post-war GHQ engines things available throughout war no other manufacturer production sold little $395 making 184 Model Aviation Retail Price S495 495 495 4 95 4 95 495 495 495 595 595 Continued page 186 Satisfaction Guaranteed EAv HINGE 5H710 Pkg 24 $295 THE HIGH-TECH HINGE DESIGNED FOR THE CYANOACRYLATE AGE Easier install other hinge No gouging picking messy epoxies Simply cut single knife slot hinge slide hinges place apply few drops favorite CA glue youre donel SUPER FAST SUPER EASY SUPER STRONG _ _ MFG CO INC.401-7 So Front St.Montezuma IA 50171 623-5154 Serious Horsepower1 0S ST VS Rossi & Webra Parts Service Custom Engines Accessories Dave Shadel Performance Specialties yJWi $1 DOfor fully illustrated catalog Available VS Long & Short Stroke OS Long Stroke 05 6IFSR 05 40 VRP/VF 0S 91 VRDF STX-40 Rossi 40 coming soon information Call 619 729-1658 Hours 10 am 5 pm Monday Thursday P 0 Box 3146 nerville NV 89410 attractive youngsters buying first gas engines Ive often wondered young people disappointed GHQ lost modeling forever Strangely responses reports have substantiated bad reputation Ive actually some good things say about power plant Hugh Black Bucyrus Ohio wrote Just let know GHQs bad everyone said over years have right now runs pretty good think should moderate comments Clarence Lee RCM extremely wide production tolerances made GHQ almost impossible average fellow run Stu Richmond Model Builder modifications porting good rework some modelers have able run GHQs John Wormly Savanna Georgia GHQ first engine did run some miracle didnt lose finger huge rough-cast aluminum prop Im surprised disappointed some enthusiast hasnt offered reproduction Id sure like have runs well Don Tyler Sanford Florida Zipper quite some time did buy prop made ita reverse pitch ighten bolt time ran Later got used Bunch Midget what difference Franldy hated damn thing made much noise Brown Ohlsson Wish still it would make great door stop Notice examples above repeated mention huge heavy factory-sold aluminum props reverse rotation Ive seen few reworked GHQs run always 4 volts huge props would seem some ran some rather poorly some rather well So can Perhaps short note received Max Faltelson San Antonio Texas can shed some light worked GHQ during 1938 1939 making engines naturally owned engines wide variances running because wide variances manufacturing After extensive rework got run very well Heres what did Honed out cylinder bore Removed webs flash Chromed piston fit cylinder Honed crankshaft bearing Chromed shaft fit bearing original engine designed manufactured sold Pete Loutrel Brooklyn New York company bought out engine re-designed built sold cheaply Loutrel sold $100 complete $75 kit $35 castings should give some idea much cheapened Well no wonder some ran some didnt Thanks Max input MORE NAVY NATS STUFF April column recalled some feel old National Championships however nothing can come closer photo sent Fran Ptaszkiewicz Towanda New York color print made color slide some blue has lost dye faded slide passing youve looked old Kodachrome slides years may suggest get transferred videotape ASAP Notice photos much shine wings of models younger guys information heat shrink material its silk lots lots clear dopelike 20 coats hand rubbed Now workmanship dying art Continued page 188 ADVANCED AERO PRODUCTS VS & OS SIMPASS ISO EXHAIST SYSTECALL XX WRITE FOR IWCRIAATB ma tOR NOAIEX MITtEN NRIAAFT AND ULTEBAS Set ADVANCEX AERO PJCTS Ru BOX 6-C ARRA TX 75003 714 9IT4-3R4X Learn fly planes private field Five 6 day course $350 Open year round Send SASE complete info Southwest RO Flying 2818 Carolina NE Albuquerque NM 87110505-832-6394 e I3000PIUS1XXXX3-NWWXhNXOSI Icolor OTO PAAKSIncluing KOKUFAN 186 Model Aviation 209 645 5535 GOLDEN GATE HOBBIES PO BOX 27001 FRESNO CAUFORNIA 93729 M/C VISA OR COD HA TORI RA DICICON IMMSK HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4FT $ 5 WE WANT NEW DEALERS ! HATORI 650 LONG PIPE $4350 TO DEALERS CATALOG $ 200 OR FREE Will-I ORDERS Make Real Decals computer printer Send $800 S/H over 15 sq ft decal materials plus instructions LABCO 27563 Dover Warren MI 48093 well think print will reproduce well enough pick up such interesting detail young fellows working models shop apron sleeping cot front work bench model trailers mix Free Flight Control Line models grasp scope its necessary realize photo shows about third total work bench area letter Fran recalls night flight pulse jet powered Control Line model space between two hangers 1950 Nats Dallas kind neat see glowing tube going round round youve ever heard things run can imagine noise echoing off two adjacent hanger walls landed asked cease desist because lateness hour area flying did course Also remember two stunt models tied tail-to-tail involved engine tug war see engine powerful Jim Walker doing ceiling walker glider routines hanger manner tricks Incidentally Fran source reprints old deBolt kit plans contact him 23 Marlee Drive Towanda New York 14150 information EDCO GYRO PLANS Through kindness Frank Zelinka Coral Gables Florida now have enough way drawings pursue Control Line gyro mentioned last column Frank writes dad Nick saw fly sometime around 1951 immediately bought kit built Frank born 1953 dad taught him fly control line time five Frank took third Nationals Jr/Sr Stunt six deBolt American powered a Johnson 35 dad decided fly gyro Bullet 29 Like would fly After let go would run along ground sometimes cutting circle would have run away fool thing avoid being hit As several readers have pointed out although instructions did mention way get gyro fly give blades vigorous spin before releasing model Once done flew well simply enough slip stream effect drive rotors otherwise Ill keep posted get farther project ANOTHER OF THOSE WEIRD COINCIDENCES sorts things keep happening get really goose bumpy Heres another planning use photos enlarged Astro Hog months column mention connection Bruce Daugerhty Astro Hog old control line DI-Doe Along comes May issue lo behold George Aldrich has three view some information DI-Doe Welcome twilight zone DDC name firm kitted DI-Doe gentlemen responsible Bruce Daugerhty Fred Dunn Herb Considder Dunn moved Ohio California developed Astro Hog swept top four places 1958 Nats II NNXJVAJr WE MQIXBI. PcJJcT PRFFNTS THE NORTH AMERICAN F~1Th 1ffTTTANrc IPRICE KIT rt FLEX I-GLASS FUSE * MACHINE CUT WINGS * MACHINE CUT STABS * ALL BUMPS & BLISTERS * 5 VIEWS & PLANS * CLEAR INSTRUCTIONS * GENEROUS HARDWARE PKG * CARBON FIBRE SPARS * ALL VACUFORMED PARTS * CLEAR CANOPY * RETRACT LOCATION SHOWN ACCESSOB ES AVA LABLE * STATIC & FLYING SPINNER /PROPS * FULL COCKPIT KIT IMODEL BUILT BY HI-ThU NUIJL bU MELE* BOMBSTANKSPILOT TO ORDER SEND CHECK OR MONEY ORDER TO Free Cockpit kit w/each order $30 value * RETRACTS & STRUTS INNOVATIVE MODEL PRODUCTS INC JUDE IN THE P 0 BOX 4365MARGATE FL 33063 OR CALL 8007803190 USA MODEL SPECIFICATIONS SPANV62SINMASTER CARD & VISA ACCECPTED 3WEIGHT 1SLBS ENGINE 108 2CY 120 4CYADD $2000 SHIPPING AND HANDLING 188 Model Aviation Flag waver! LoRTHEASr SCREEN GRAPHICS 21 FISHER AVE EAST WHGMEADIIW MA O1H2R 42CD QUADRA 41 4CC / 25301 29HP / 4OLBS SPRING STARTER ALUMINUM MOUNT MUFFLER PROPS PLANS SUPERTANKS MUFFLERS FULL LINE QUADRA PARTS & ACCESSORIES SEND $100 FOR COMPLETE CATALOG U S QUADRA RT 1 NEODESHA KS 66757 316 325-2821 FAX 325-2222 TEl 413-525-411R FAX 413-525-719 became legend Wonder George knew also see Georges Up Around photo earlier-mentioned American stunter LITTLE WHITE RIPE little white bipe scratch designed Ultimate modified 4-40 bipe Should say highly modified started 4-40 bipe kit obviously reworked cockpit turtledeck vertical fin swept wings still just 4-40 bipe under skin Im delighted just couldnt resist using photo Early flight testing indicates K&B 45 Sportster absolute top end power curve Im sure would fly very nicely 25 in3 power plant wildly fast full throttle breathtaking vertical performance point exercise no definite decision about publication and/or kitting Nonetheless sure did turn out pretty PHOTOS PLEASE Support RC groups has excellent now need material Free Flighters guys will just get some stuff Ill gladly report sport free flight activitiesD foe Card Page 142 Ea5eo3slasrtt0 N L Y -6 RAFTIRADIO ID LABEL SETS Identify aircraft per AMA safety rules SeIf-ssck labels ease apjOiy permanent Send check tar set $125 plus 45 P&H 52201 sets $490 plus 190 P&H $590 taIsadrsf Enserpises P080515 tree Sods NY 19021 SAMS MODELS SPITFIRE England13 or2G span Europes lead ng F eta F ght & V ntage specialist SAMS 1600 item catalog FREE Send $2 postage SAMS Chapel Sandon Harts SG9 OOJ England NOTE S billsNlSAl Master Card hecks & stamps valid England FF Duration/Murphy Continued page 57 expected relatively low because FAI Team Finals being staged West Coast just couple weeks prior Lawrenceville Nationals FlG Coupe dHiver FIH Al Towline also outdrew sophisticated counterparts FlB Wakefield Rubber FlA A2 Towline considerable margins well Although bolstered good showings two rubber-powered classes FAI events group trailed list category averages 318 entries per event compared 426 entries per event average events category leader AMA Gas 574 entries per event Probably few other national competitions have drawn such evenly distributed event entry numbers such full complement event categories Nationals along AMA FAI schedules numerous SAM Old Timer events six NFFS Nostalgia Gas events offered within five-day session well Obviously events various hi-point award challenges being offered within categories forced contestants make choices about events enter sacrifice simply wasnt enough time fly everything might want days time mention get older get slower subtle development has also noted others frequent large affairs amazing resurgence participation various rubber-powered events past few years popularity obvious perusing numbers charts headed P-30 Mulvihill Rubber relatively new NFFS Nostalgia Gas movement still growing could grow steadier hi-tech materials screaming Schnuerles utilization variable flying surfaces along other gadgetry continues infiltrate influence AMA Gas classes greater degree could Nostalgia Gas events will eventually haven prefer build fly simple machine special Nostalgia Gas Ignition event will probably catch up levels OldTimer Gas Ignition entries before long interest still climbing will no doubt accelerate event approaches official status under Nos Gas umbrella simpler events also head OldTimer category 020 Replica obvious category leader basic OT stick fuselage Rubber events show fine representations entries about equal four events New kit releases vintage designs will surely maintain increase levels participation well add entry numbers together Electric B class would make top 40 charts Electric interest Free Flight has growing about rate trickle charger Midwest least have gone step up one-and-two entrant levels years past seems electric power offers whole different set parameters lot experimentation involved effective results notice serious competitors field have forsaken other events concentrate battery-powered concepts should expect years hence fellows will forefathers power source seems inevitable regardless apparent current apathetic interest other Free Flight competitors would guess future breakthroughs current weight handicaps motors batteries will greatly speed acceptance power alteruative Just will get nuclearpowered models anyones guess Continued page 190 reader-written publication about R/C soaring dedicated sharing technical educational information theory practical application $19 Bulk/Third Class $26 First Class Outside USA Please write RIC Soaring Digest PO Box 6680 Concord CA 94524 August 1991 189 R/C Battery Test V Those apply Sorry cant fly today. forgot charge up last night E I hope didnt cook batteries charged full rate way over 16 hours 0 This should realty last flight Im sure bstteries fully charged [1 I wish could remember name device trickle charges batteries wouldnt have worry about time know tile doesnt require assembly soldering.ifs about size 5 golf-ball 0 Sure can fly today trickle charge RIC system continuously French Trickier! Take worry Out battery charging. trickle charge batteries days weeks avert months Convenient Glow-Light assures trickier doing its job. ready fly anytimell $995 S & H French Electronics Inc P0 Boa 255 Worthington OH 43085 Linquire local hobby shop first ZENOAH SACHS-oOLMAR & QUADRA ENGINES ERCOUPE TOMAHAWK te J3 KIlTEN KITS ZINGER PROPS FUEL TANKS CB WHEELS Carbon-Fiber Arrowahafta Ceconite & Glue OGA & MGA PILOTS Sand $100 catalog JIM MESSERS QUALITY MODEL PRODUCTS Valley View Box 43 Allegany NY 14706 PINSPATCHES Lutan irnIiim Co CUSTOM ENAMEL PINS & EMBROIDERED PATCHES MADE TO YOUR DESIGN 303 667-4940 P0 Box 1615Loveland CO80539

APC Propellers IN THE APRIL issue mentioned recent propeller releases Landing Productsthe competition series APC propellers nine inch diameter pitches 65 75 85 inches Ive since received information Fred Burgdorf describing development production APC propellers differences sport competition propellers APC propellers first described last four Model Propeller Noise articles Vess Heathcoat Nagel appeared December 1989 March 1990 issues Model Aviation articles described mechanisms propellers model aircraft contribute overall noise model aircraft primary observations researchers Power Bob Ritzs Guardian McCoy 60 spring-ioaded throttie coupied intake baffie weii throt tie operated single ilne through system pulisys Suction fuei system Some older engines past Carrier modeis Anyone iew 1 960a early 1970s should have no trouble identifying younger readers clockwise top Rossi 60 Fox 59 McCoy 60 APC propeiiers Landing Products main subject month new competition series propeiier 9 x 65 size appears between two Sport series props revised biade shape enlarged hub Competition prop apparent 50 Model Aviation [Lx Navy Carrier Dick Perry 6739 Stonecutter Dr Burke VA 22015 ABSTRACT months column contains formation about new competition series APC propellers some discussions about Carrier earlier years request information east coast Carrier fliers Grumman Guardian fiown Carrier competition before advent dispisoement ciasses belonged Bob Ritz predates Stoning Guardian kit J-Roberts bellcrank detail went model finish markings example us aii Continued page 181 CL Navy Carrier/Perry Continued page 50 1 Propellers predominant source noise model aircraft effective mufflers 2 Torque noise prominent type propeller noise 3 reason torque noise high because model propellers very inefficient turning torque engine output thrust final article described APC propellers cited quiet operation point research no measurements taken APC propellers because available research begun however tested subjectively compared other propellers part research results although quantified showed APC propellers significantly quieter Certain APC propellers also produced higher flight speeds achieved other propellers same models engines performance increase surprising considering low noise levels APC propellers quieter propeller turns less torque noise leaving torque convert thrust Propeller design procedures basically unchanged Wright brothers through 1960s Improvements performance result experimentation theoretical analysis has since development computational fluid dynamics computers support propellers could designed tested benefit wind tunnels experimental flight tests Model propellers have evolved much same way Propeller developments have largely result trial error Commercial propeller designs have often dictated production limitations carving wood props economics having start SCRATCHBUILD 14 SCALE PLANS span sheet price CESSNA AGWAGON123-54~S60-OO CESSNA U206TU206107575nrS6500 CESSNA 152 AEROBAT99573uS5S0O PIPER PAWNEE10874nS60O0 TRANSA VIA AIRTRUK117875nS65OO EDO FLOATS5872n5390O EDO AMPHIBFLOATS 613~S49-00 Add 40Z Surface Mail P & P VISA & MASTERCARD Welcome r OONO FIZRHOO FOR COMPLETE LISTING OF ALL PLANS BOORS PROSUCTS SERTICRO FREE WITH ALL ORSERO wood prop theoretical arbitrary pitch distribution design master casting synthetic propeller Landing Products took different approach using computer-aided design manufacturing CAD/CAM techniques computer program uses very carefully chosen mathematical descriptions propeller shapes descriptions sufficiently general nature allow high design flexibility sacrificing desirable aerodynamic characteristics mathematically defined shapes design program converted commands direct numerically controlled milling machine makes production molds process typical 1 1-in-diameter propeller requires about seven hours computer time compute control commands another seven hours machining produce molds tests Vess et al demonstrated propeller efficiencies generally less 50% ie less half engines power making thrust rest consumed noise other losses improvement possible could readily deduced full-scale propeller efficiencies can top 85% Vess tests measured actual efficiencies over range operating points have similar data APC propellers subjective performance comparisons reduced noise levels point significantly improved efficiencies APC propellers first introduced APC propellers sport series designation B 11 cast hub B-ll props designed have optimum pitch airfoil over very large portion blade B-l 1 propellers rapid transition hub optimum blade airfoil within about inch radius center 9-in-diameter propeller early design experienced some failures field conditions propellers have replaced sport series C-2 design C-2 propellers significantly stronger original APC propellers latest iteration APC propeller Continued page 182 IfTRAU u ULTRA WINGMAN Glow Plug Driver ometer ust GasTemperature Indicator e Expanded-Scale Voltmeter Flight Check Flight Select bel Meter e Timer Modes Pattern Select ent Temperature ULTRA WINGMAN $20000 Includes Unit cable battery pack charger Helicopter version$21000 Airborne-Sensor Pack$4000 CONVENIENT The Ultra Wingman achieves multiple tunctions such Glow Plug driver Exhaust Gas Temperature indicator Tachometer Expanded Scale Voltmeter through connection model airborne-sensor pack approx 1 ounce easily installed drilling halt inch hole tuselage routing tour leads appropriate positions SAFE The Ultra Wingman otters sate ig nition ot glow plug well simultaneous reading ot RPMs Exhaust Gas Temperature through single connection sately distanced trom prop same connection frequent receiver battery pack checks made easy Ultra Wingmans loaded digital Expanded Scale Voltmeter Pre-Flight Check list provided help assure sate preparation operation ot model ECONOMICAL The Ultra Wingman ot ters ten distinct tunctions compact hand-held unit Actual size 4 73/418 cable SALES & CUSTOMER SERVICE Z 5455 LINGER LONGER ROAD CUMMING GA 30130 August 1991 181 BO SCAT NEW ZEALAND AERO PRODUCTS 34 WARS PARADE STIRLING POINT RLOFF NEW ZEALAND ill GAIN ONT1tOL~71 Losing control can nightmare wrong response given command can take its toll model nerves wallet Radio South know feel about hobby too avid RC enthusiasts nearly half century combined experience modeling radio repair So avoid inflated repair costs undue service time Radio South fast economical in-house radio service can depend Radio South customer satisfaction isnt just mono Its way life Let us put back control Futaba Knr 5524 N Palafox Pensacola FL 32503 repair information 904 434-0909 1-800-962-7802 Toll Free Order Line lOrders Only Please Natural resonant frequencies also considered designed higher anticipated operating speed resulting propellers designated D- 1 sold competition series As accompanying photographs illustrate D-l propellers have blade area inboard 65 70% diameter enlarged hub comparison between 9 x 7 C-2 sport prop 9 x 75 D-1 competition propeller shows D- 1 able absorb 70% power 15% higher rpm produce 40% thrust same internal stress propeller blade APC propellers molded longfiber composite material has over double strength unreinforced nylon 25 30% stronger glass-filled nylon shorter fibers resulting propeller very stiff stiffness improves performance also increases stress blade subjected shock loading such hitting deck landing Prudence would dictate replacing propeller after arrested landing least thoroughly inspecting before using again advice valid propeller just APC Landing Products As being written have yet complete muffler-equipped practice model use club Northern Virginia Control Line Association flying field Test results comparing APC props other propellers commonly used Carrier will have wait next installment column Nostalgia model engine photos month Ron Duly Burbank California Ron active Navy Carrier quite now renewing activity event won Class II Riverside California NATS 1977 first recipient Eugene Ely Award outstanding Navy Carrier flier Riverside started flying Carrier 1967 Sturdi-Built AM-i Mauler McCoy 60 Mauler kit could MEYS HI TECH HOBBY INC White Pond Rd Stormville NY 12582 Introduces. AcuScaleAccu rately Scaled R/C Aircraft Plus Full Line Hobby Shop Supplies 110 Scale A6 Intruder 1/16 Scale B-17 Electric Span 636 Length 655 ht 9 11 lbs Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers chable Wings Vacuformed Canopy Moch Morel Uses Dynamax Faa72 1090 Size Engine Intro Price35O Span 7175 Lengtb 56 Convened Gas Fiberglass Fuse Cares w/Mnlded Fiberglass Skins Precut Farmers Vacuformed Cowlings Much 4/05 Motors Intro Price425 purchased about $1500 back three engines have quite history Rossi Bill Johnson fuel meter exhaust slide Rons engine 1977 NATS could easily top 120 mph good dayprobably still can McCoy 60 probably popular engine since beginning Carrier flying used beginning having started out ignition engine 1940s 65 displacement limit established Class split off littles Carrier models McCoy still going strong Class II engine particular engine also fitted Johnson meter slide belonged long time Carrier Hobby Horn hobby specialties MIDWAY MODEL C2 Old Timer Kits R/C AND FF Hobby Horn discount prices MMC FULL KITS listed Full Kits include cut parts plan strip sheet wood wire window material Kits marked have wire landinear pre-bent $6799 1938 R4jehou5e SO" $3596 1937 Lon Cabin 70 $4952 1939 U Sporlster 50 s3596 1937 Quaker Flash 6T 4784 1940 Buzzard Bombshell 50 span kit 3590 1937 Air Chief Si 3776 1940 New Ruler 74 1939 Thermic 100 Glider 100 Span Old Yirner 7472 Sailplane--modifications shown RIG $8623 P & W MODEL SERVICE Old Timer kits FF R/O following discount p rice full kits full kits clude cut parts plan stick sheet wood wire windshield material 1935 Miss America 84$7556 1936 Buccaneer 84$6296 1937 Dallaire 108$7992 1938 Clipper Mk 172$5596 1938 Kloud King 63$4440 1938 Powerhouse 84$5624 1938 Record Breaker 96$7304 1930 Trenton Terror 72$4280 1939 Korda wake 44$2012 1939 Mercury 72$6128 1939 Zipper 54$5624 1940 Ranger 48$3355 1940 Saillane 70$8900 1940 So Long 50$3168 1941 Brigidier 56$4279 1941 Super Quaker 78$7640 1941 Playboy Jr 54$3272 1941 Playboy Sr 78$5372 1941 Brooklyn Oodqer 56$4448 250 $2 pp/lst Class free $ 01 $2000 adrequested 1st order 8 4 82 Page 1991 CATALOGUF $300$2001to$45 add 375 $4501 $7000 add $500 bb Horn $7000 add $425 Oe 15173 MO STIAI Calif add 600%tax Send BOX 2212 MO VISNMC # & ExplowESTMINsTERCA 92684 checksHours Mon-Fri 9AM 5PM Check allow up 30 714 893-83llPhone days clearance 714 895-6629 FAX 182 Model Aviation Coming Soon. Electric -130 tric OV-1 OA Bronco r Etendard Duct Fan a A-37 Duct Fan Call 914 878-75239am 3pm est 914 279-32704pm 8pm est modeler Roland Baltes models appeared April 1991 column Fox 59 its intake throttle used early Carrier pioneer Bill Netzband shown another engine would pretty well round out field 1960 early 1970s Carrier rear intake SuperTigre G65 its flat piston directional porting also quite good engine saw quite evolution iron/steel piston liner plastic rotor ABC construction steel rotor finally Perry Directional Porting introduced just Schnuerle porting becoming popular earlier loop-scavenged engines produced lot torque lower speeds current crop Schnuerle engines could probably still hold own Carrier circles especially higher pitch propellers now available other advantage over current 65sthey about quarter pound lighter Grumman Guardian belonged late Bob Ritz McCoy 60 pre Roberts throttle mechanism consisting single steel line routed around pulleys actuating spring loaded exhaust baffle stovepipe-damper type intake throttle model used suction fuel system Ive giving little thought Carrier event revive older models nat available yaar habbtl shap ORDER DIRtCT tar immediate shipment Check MO iliaa MC ar COD accepted Add $250 tar LIPS $300 tsr COD 6/o sales tan far Calif residents engines would use pre-1976 rulesmuch like Old-time Nostalgia Stunt events popular Id interested hear thoughts such event enough interest no serious detractors Ill put together some rules suggestions future column Let know what think Virginia Area Carrier Interest has quite since Carrier events flown Winston-Salem North Carolina quite long since last Carrier contest Norfolk Virginia know few newcomers Carrier events Virginia Maryland well few flew Carrier days past have inquires few areas east coast about Carrier interestmost recently William Davis Winston-Salem would like organize Carrier contest Washington DC area common question What kind participation would help answer question Id like hear east coast Carrier modelers particularly Maryland New Jersey Pennsylvania Virginia West Virginia North South Carolina Let know address give idea far would drive attend contest Continued page 184 Snuf-Vibe BACK PLATE MOUNTS Front Intake Engines Aluminum Back Plate Mounts ar light weight easy install Just bolt engine crank case mounts equipped SNUF-ViBE isoiation system double protection engine vibration SIX SIZES FOR ENGINES 15 TO 182 JT-BPI 09 15 1496JT-BP4 60 901496 JT-8P2 19 26 1496JT-6P6 MAX 90-1081795 JT-6P3 29- 056 1496JT-9P6 ST2SOO-30002196 -gzi SEND 251 STAMPmhw FOR ADDITIONAL INFO AND JIEC tATALOG164 School St Daly CIty CA 94014 14161 7563400 SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Foal $495 pIus 10% Subtotal Continental US UPS Neat Day Air $1400 plua $1 00 per lb Shipment total 000 add $395 Foreign Ordera Parcel Post Air $495 * 20% Subtotal US Mail $495 plus 10% Subtotal August 1991 183 PRECISION MODEL PRODUCTS iZJ gsA Made U S BARSTOCK ALUMINUM SPINNERS Part NoSize 11-150-B 2 T1-175-B1-3/4 11-200-B 2 TT-225-B2-1/4 TT-226-B 4 FAt . 11-250-B 2 11-251-B.2-1/2FAI . 11-275-B2-3/4 T1-276-B2-3/4 FAt 11-300-B3 11-301-B3FAI 11-325-B3-1/4 TT-350-B3-1/2 TT-375-B3-3/4 TT-400-B4 RetailApprox PriceWeight S1395 .. 058 oz 149509502 1595 10002 169516002 1895.15002 1895 02 2095170 oz 2295 --22002 2495200 02 2695 . -26002 2895. 25002 3695- 34002 499547002 5995- 520ox 69 95 . . 570 07 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $3 00 Per Spinner PROP NUT ADAPTORS V 0 Part No Size 11-140-A . 8 11-147-A1/4-28/7mm IT-610-A6 x 1 0mm TT-710-A7 x 1 0mm TT-516-A5/16-24 TT-518-A5/16-24/8mm TT-810-A8 x 10mm TT-825-A . 25mm TT-375-A -24 11-125-A x 125mm pp too Weight 061 02 061 07 063 ox 082 02 076 02 076 02 076 02 075 02 117 02 115 02 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 will make list names addresses available anyone thinking about organizing Carrier contest Perhaps through better communication can bring Carrier flying back central east coast regionLI Flying Fun/Mathews Continued page 105 super careful frequency control rules place list detailing has what frequency circulated minimize duplications group meets formally once year envy area long waiting list membership kept waited three years admitted after unfortunate death members Normally openings occur someone moves away Wichita some utopian flying field obtainable rich just plain old bunch dedicated fliers hauled off solved problem own begging some city council board directors help Sure its bit cosfly flying park someones guest compared other outdoor activities its actually bargain Considering costs involved some jerk shoots out air crowded public facility get tangled mid air student place cheap would seem approach viable fliers way develop secure flying site over have control constant worry potential eviction Perhaps should get rid mind set someone owes us place fly ourselves GHQ Several mentions made previous RC Old Timer columns concerning truly ghastly reputation pre- post-war GHQ engines things available throughout war no other manufacturer production sold little $395 making 184 Model Aviation Retail Price S495 495 495 4 95 4 95 495 495 495 595 595 Continued page 186 Satisfaction Guaranteed EAv HINGE 5H710 Pkg 24 $295 THE HIGH-TECH HINGE DESIGNED FOR THE CYANOACRYLATE AGE Easier install other hinge No gouging picking messy epoxies Simply cut single knife slot hinge slide hinges place apply few drops favorite CA glue youre donel SUPER FAST SUPER EASY SUPER STRONG _ _ MFG CO INC.401-7 So Front St.Montezuma IA 50171 623-5154 Serious Horsepower1 0S ST VS Rossi & Webra Parts Service Custom Engines Accessories Dave Shadel Performance Specialties yJWi $1 DOfor fully illustrated catalog Available VS Long & Short Stroke OS Long Stroke 05 6IFSR 05 40 VRP/VF 0S 91 VRDF STX-40 Rossi 40 coming soon information Call 619 729-1658 Hours 10 am 5 pm Monday Thursday P 0 Box 3146 nerville NV 89410 attractive youngsters buying first gas engines Ive often wondered young people disappointed GHQ lost modeling forever Strangely responses reports have substantiated bad reputation Ive actually some good things say about power plant Hugh Black Bucyrus Ohio wrote Just let know GHQs bad everyone said over years have right now runs pretty good think should moderate comments Clarence Lee RCM extremely wide production tolerances made GHQ almost impossible average fellow run Stu Richmond Model Builder modifications porting good rework some modelers have able run GHQs John Wormly Savanna Georgia GHQ first engine did run some miracle didnt lose finger huge rough-cast aluminum prop Im surprised disappointed some enthusiast hasnt offered reproduction Id sure like have runs well Don Tyler Sanford Florida Zipper quite some time did buy prop made ita reverse pitch ighten bolt time ran Later got used Bunch Midget what difference Franldy hated damn thing made much noise Brown Ohlsson Wish still it would make great door stop Notice examples above repeated mention huge heavy factory-sold aluminum props reverse rotation Ive seen few reworked GHQs run always 4 volts huge props would seem some ran some rather poorly some rather well So can Perhaps short note received Max Faltelson San Antonio Texas can shed some light worked GHQ during 1938 1939 making engines naturally owned engines wide variances running because wide variances manufacturing After extensive rework got run very well Heres what did Honed out cylinder bore Removed webs flash Chromed piston fit cylinder Honed crankshaft bearing Chromed shaft fit bearing original engine designed manufactured sold Pete Loutrel Brooklyn New York company bought out engine re-designed built sold cheaply Loutrel sold $100 complete $75 kit $35 castings should give some idea much cheapened Well no wonder some ran some didnt Thanks Max input MORE NAVY NATS STUFF April column recalled some feel old National Championships however nothing can come closer photo sent Fran Ptaszkiewicz Towanda New York color print made color slide some blue has lost dye faded slide passing youve looked old Kodachrome slides years may suggest get transferred videotape ASAP Notice photos much shine wings of models younger guys information heat shrink material its silk lots lots clear dopelike 20 coats hand rubbed Now workmanship dying art Continued page 188 ADVANCED AERO PRODUCTS VS & OS SIMPASS ISO EXHAIST SYSTECALL XX WRITE FOR IWCRIAATB ma tOR NOAIEX MITtEN NRIAAFT AND ULTEBAS Set ADVANCEX AERO PJCTS Ru BOX 6-C ARRA TX 75003 714 9IT4-3R4X Learn fly planes private field Five 6 day course $350 Open year round Send SASE complete info Southwest RO Flying 2818 Carolina NE Albuquerque NM 87110505-832-6394 e I3000PIUS1XXXX3-NWWXhNXOSI Icolor OTO PAAKSIncluing KOKUFAN 186 Model Aviation 209 645 5535 GOLDEN GATE HOBBIES PO BOX 27001 FRESNO CAUFORNIA 93729 M/C VISA OR COD HA TORI RA DICICON IMMSK HATORI BLUEPRINT SHOWS ALL EXHAUST ITEMS FULL SIZE 2FT X 4FT $ 5 WE WANT NEW DEALERS ! HATORI 650 LONG PIPE $4350 TO DEALERS CATALOG $ 200 OR FREE Will-I ORDERS Make Real Decals computer printer Send $800 S/H over 15 sq ft decal materials plus instructions LABCO 27563 Dover Warren MI 48093 well think print will reproduce well enough pick up such interesting detail young fellows working models shop apron sleeping cot front work bench model trailers mix Free Flight Control Line models grasp scope its necessary realize photo shows about third total work bench area letter Fran recalls night flight pulse jet powered Control Line model space between two hangers 1950 Nats Dallas kind neat see glowing tube going round round youve ever heard things run can imagine noise echoing off two adjacent hanger walls landed asked cease desist because lateness hour area flying did course Also remember two stunt models tied tail-to-tail involved engine tug war see engine powerful Jim Walker doing ceiling walker glider routines hanger manner tricks Incidentally Fran source reprints old deBolt kit plans contact him 23 Marlee Drive Towanda New York 14150 information EDCO GYRO PLANS Through kindness Frank Zelinka Coral Gables Florida now have enough way drawings pursue Control Line gyro mentioned last column Frank writes dad Nick saw fly sometime around 1951 immediately bought kit built Frank born 1953 dad taught him fly control line time five Frank took third Nationals Jr/Sr Stunt six deBolt American powered a Johnson 35 dad decided fly gyro Bullet 29 Like would fly After let go would run along ground sometimes cutting circle would have run away fool thing avoid being hit As several readers have pointed out although instructions did mention way get gyro fly give blades vigorous spin before releasing model Once done flew well simply enough slip stream effect drive rotors otherwise Ill keep posted get farther project ANOTHER OF THOSE WEIRD COINCIDENCES sorts things keep happening get really goose bumpy Heres another planning use photos enlarged Astro Hog months column mention connection Bruce Daugerhty Astro Hog old control line DI-Doe Along comes May issue lo behold George Aldrich has three view some information DI-Doe Welcome twilight zone DDC name firm kitted DI-Doe gentlemen responsible Bruce Daugerhty Fred Dunn Herb Considder Dunn moved Ohio California developed Astro Hog swept top four places 1958 Nats II NNXJVAJr WE MQIXBI. PcJJcT PRFFNTS THE NORTH AMERICAN F~1Th 1ffTTTANrc IPRICE KIT rt FLEX I-GLASS FUSE * MACHINE CUT WINGS * MACHINE CUT STABS * ALL BUMPS & BLISTERS * 5 VIEWS & PLANS * CLEAR INSTRUCTIONS * GENEROUS HARDWARE PKG * CARBON FIBRE SPARS * ALL VACUFORMED PARTS * CLEAR CANOPY * RETRACT LOCATION SHOWN ACCESSOB ES AVA LABLE * STATIC & FLYING SPINNER /PROPS * FULL COCKPIT KIT IMODEL BUILT BY HI-ThU NUIJL bU MELE* BOMBSTANKSPILOT TO ORDER SEND CHECK OR MONEY ORDER TO Free Cockpit kit w/each order $30 value * RETRACTS & STRUTS INNOVATIVE MODEL PRODUCTS INC JUDE IN THE P 0 BOX 4365MARGATE FL 33063 OR CALL 8007803190 USA MODEL SPECIFICATIONS SPANV62SINMASTER CARD & VISA ACCECPTED 3WEIGHT 1SLBS ENGINE 108 2CY 120 4CYADD $2000 SHIPPING AND HANDLING 188 Model Aviation Flag waver! LoRTHEASr SCREEN GRAPHICS 21 FISHER AVE EAST WHGMEADIIW MA O1H2R 42CD QUADRA 41 4CC / 25301 29HP / 4OLBS SPRING STARTER ALUMINUM MOUNT MUFFLER PROPS PLANS SUPERTANKS MUFFLERS FULL LINE QUADRA PARTS & ACCESSORIES SEND $100 FOR COMPLETE CATALOG U S QUADRA RT 1 NEODESHA KS 66757 316 325-2821 FAX 325-2222 TEl 413-525-411R FAX 413-525-719 became legend Wonder George knew also see Georges Up Around photo earlier-mentioned American stunter LITTLE WHITE RIPE little white bipe scratch designed Ultimate modified 4-40 bipe Should say highly modified started 4-40 bipe kit obviously reworked cockpit turtledeck vertical fin swept wings still just 4-40 bipe under skin Im delighted just couldnt resist using photo Early flight testing indicates K&B 45 Sportster absolute top end power curve Im sure would fly very nicely 25 in3 power plant wildly fast full throttle breathtaking vertical performance point exercise no definite decision about publication and/or kitting Nonetheless sure did turn out pretty PHOTOS PLEASE Support RC groups has excellent now need material Free Flighters guys will just get some stuff Ill gladly report sport free flight activitiesD foe Card Page 142 Ea5eo3slasrtt0 N L Y -6 RAFTIRADIO ID LABEL SETS Identify aircraft per AMA safety rules SeIf-ssck labels ease apjOiy permanent Send check tar set $125 plus 45 P&H 52201 sets $490 plus 190 P&H $590 taIsadrsf Enserpises P080515 tree Sods NY 19021 SAMS MODELS SPITFIRE England13 or2G span Europes lead ng F eta F ght & V ntage specialist SAMS 1600 item catalog FREE Send $2 postage SAMS Chapel Sandon Harts SG9 OOJ England NOTE S billsNlSAl Master Card hecks & stamps valid England FF Duration/Murphy Continued page 57 expected relatively low because FAI Team Finals being staged West Coast just couple weeks prior Lawrenceville Nationals FlG Coupe dHiver FIH Al Towline also outdrew sophisticated counterparts FlB Wakefield Rubber FlA A2 Towline considerable margins well Although bolstered good showings two rubber-powered classes FAI events group trailed list category averages 318 entries per event compared 426 entries per event average events category leader AMA Gas 574 entries per event Probably few other national competitions have drawn such evenly distributed event entry numbers such full complement event categories Nationals along AMA FAI schedules numerous SAM Old Timer events six NFFS Nostalgia Gas events offered within five-day session well Obviously events various hi-point award challenges being offered within categories forced contestants make choices about events enter sacrifice simply wasnt enough time fly everything might want days time mention get older get slower subtle development has also noted others frequent large affairs amazing resurgence participation various rubber-powered events past few years popularity obvious perusing numbers charts headed P-30 Mulvihill Rubber relatively new NFFS Nostalgia Gas movement still growing could grow steadier hi-tech materials screaming Schnuerles utilization variable flying surfaces along other gadgetry continues infiltrate influence AMA Gas classes greater degree could Nostalgia Gas events will eventually haven prefer build fly simple machine special Nostalgia Gas Ignition event will probably catch up levels OldTimer Gas Ignition entries before long interest still climbing will no doubt accelerate event approaches official status under Nos Gas umbrella simpler events also head OldTimer category 020 Replica obvious category leader basic OT stick fuselage Rubber events show fine representations entries about equal four events New kit releases vintage designs will surely maintain increase levels participation well add entry numbers together Electric B class would make top 40 charts Electric interest Free Flight has growing about rate trickle charger Midwest least have gone step up one-and-two entrant levels years past seems electric power offers whole different set parameters lot experimentation involved effective results notice serious competitors field have forsaken other events concentrate battery-powered concepts should expect years hence fellows will forefathers power source seems inevitable regardless apparent current apathetic interest other Free Flight competitors would guess future breakthroughs current weight handicaps motors batteries will greatly speed acceptance power alteruative Just will get nuclearpowered models anyones guess Continued page 190 reader-written publication about R/C soaring dedicated sharing technical educational information theory practical application $19 Bulk/Third Class $26 First Class Outside USA Please write RIC Soaring Digest PO Box 6680 Concord CA 94524 August 1991 189 R/C Battery Test V Those apply Sorry cant fly today. forgot charge up last night E I hope didnt cook batteries charged full rate way over 16 hours 0 This should realty last flight Im sure bstteries fully charged [1 I wish could remember name device trickle charges batteries wouldnt have worry about time know tile doesnt require assembly soldering.ifs about size 5 golf-ball 0 Sure can fly today trickle charge RIC system continuously French Trickier! Take worry Out battery charging. trickle charge batteries days weeks avert months Convenient Glow-Light assures trickier doing its job. ready fly anytimell $995 S & H French Electronics Inc P0 Boa 255 Worthington OH 43085 Linquire local hobby shop first ZENOAH SACHS-oOLMAR & QUADRA ENGINES ERCOUPE TOMAHAWK te J3 KIlTEN KITS ZINGER PROPS FUEL TANKS CB WHEELS Carbon-Fiber Arrowahafta Ceconite & Glue OGA & MGA PILOTS Sand $100 catalog JIM MESSERS QUALITY MODEL PRODUCTS Valley View Box 43 Allegany NY 14706 PINSPATCHES Lutan irnIiim Co CUSTOM ENAMEL PINS & EMBROIDERED PATCHES MADE TO YOUR DESIGN 303 667-4940 P0 Box 1615Loveland CO80539