NATS NEWS Tom Culmsee Event Director Soaring years AMA Nats called let everyone know what schedule would Its quite bit different past years please read carefully Soaring Nats will run Monday July 18 through Saturday July 23 Flying will nice big field near Richland WA south east corner state rundown daily events Monday Cross-Country race AMA Sanc tioned flown provisional F3H rules Fliers X-C can go up fabulous Eagle Butte some Slope fun-flying Tuesday Hand-Launch event Transmitter check 100-500 pm Wednesday Scale F3B events Transmitter check 100-500 pm Thursday Unlimited Class event Friday Standard Class event Saturday Two-Meter Class event NSS Banquet will evening Clover land Inn awards will presented events Looks like great week flying sched ule adds two days Tuesday-through-Friday program used recent years New course Hand-Launch event chance partici pate Cross-Country race during Nats week Both types flying gaining popularity Nats exposure should really give big boost Also running Sailplane class per day will new should able get nearly same number flights before because three classes plus Scale have flown over four days past years sites facilities said first class expanded Soaring schedule op portunity families combine Nats vacation scenic Northwest have hunch will turn Out very popular Nats Sailplaners Better get entry early Ques tions can addressed SASE Tom Culm see 2190 SW 8th Dr Gresham OR 97080 telephone 503 667-4532 Wil Byers 632 Meadows Drive East Richland WA 99352 tele phone 509 627-5224 North Alabama Silent Fliers Ron Swinehart sent group photo taken 88 LSF South eastern Regional Contest wanted let know about host club new NASF Soaring club Huntsville AL Ron club pres ident said have great 58-acre sod farm hybrid Bermuda grass use flying field NASF has grown 33 members years time personal note Ron said has using ATRCS-modified Airtronics Module radio since August LJMP Meteor flat wings fully sheeted ailerons Flies great 95-oz 129 ozIsq ft wing load ing fliers north Alabama wishing con tact Ron address 8733 Edgehill Dr Hunts ville AL 35802 Database Soaring clubs really appreciate re ceiving word about new clubs because beginners often write asking live Possum Bottom get started Gliders know best way start Soaring get hooked up experienced fliers knew Soaring group near beginner Id able put him touch AMA has listing Chartered Clubs clubs arent chart ered some groups dont go formality organizing club point have sort Soaring group willing help beginners Id appreciate hearing New Larry Jolly Gliders photos Larrys partner Dennis Brandt taken F3B Team Selection Finals September Win some shown prototype model about 90% finished time Its good look ing 128-in-span plane fully sheeted builtup balsa wing ailerons flaps spoilers glass fuse lage slip-on nose cone T-tail fixed stab/separate elevator should flying now will get report Larry Dennis 1 12-in-span Cheetah available now UMP $150 list price plane 48 Model Aviation Radio Conoi Soaring Byron Blakeslee WInnebago Dr Sedalla CO 80135 Can count 27 pilots photo entrants 1988 1SF Southeastern Regional Contest hosted North Alabama Silent Fliers Club Winners 1SF plaques NASFs contest L-R Bob Sowder 1SF V Paul Behr Loren Banco Dick Renskers Tom Killough Wayne Blankenship Kendall McDonald Alex Dydulas Raleigh NC two Sailpianes based Airtronics Sagitta family calls smaller 130-in span Cumic Plus Plus larger 150-in span Cumic XC Photo above gives other look Cumic XC sports blue/white finish Alex tells designed months column beautiful proportions really looks right has same fuselage LJMP Pantera designed Don Chancy back late Sev enties Pantera 100-in-span polyhedral ship Eppler 205 airfoil still good plane can buy class Modified Pantera kits straight wings make excellent Standardclass aileron planes What Dennis Larry have done Cheetah improve good thing has same airfoil wings straight tapered fully sheeted side extended 6 rudder all-flying stab same Pan tera Dennis has flying prototypes two seasons says nicest handling Glider hes flown fully sheeted wings make effi cient also light Cheetah can climb out gopher belches according Den nis cant beat LJMP can contacted 5501 W Como Santa Ana CA 92703 phone 714 826-6861 missing Sagitta Alex Dydula Raleigh NC sent such interesting letter cant better print its entirety Take away Alex thought Id take time share some recent building experiences belong RISE Raleigh Independent Soaring Enthu siasts Club write articles club newslet ter kit reviews construction mods hints-and-tips kind stuff Ive active building flying Sailplanes over three years just having completed LSF Level Ill really got bug now have wide col lection kits fuselages two-car Sail plane factory garage know Tony Arnoux Miami fairly well converse him Continued page 148 Carry Largest Only Stock Kraft Parts World .. Kraft alive working KRAFT MIDWEST Au66orIzsd Warranty Service ILL FLY WHAT Fl FREOUENCY CONVERSION $1000 Disnoont Regal Rapait Moot Makes Models Converted Towng Dons Spectwm Anelyter Also Service ForACE U/C jjj] Only Full Time Servicenter Ihe Midwesl ~17 East Main St Northville Michin 48167 Upper Level-u1occor Phone IJIJJ-tUAJOJ Visa Meeterrd hlcorneMarch 1989 49 Dennis Brandt newest Larry Jolly Model Products kit Cheetah Its available right now Wingspan 112 Wings fully sheeted have ailerons spoilers Holds twelve gb-plugs U Made tough fuel resistant Protects elements dirt hard knocks Keeps gb-plugs neat organized easy find easy use See favorite Hobby Shop Du-Bro Products Inc Bonner Road Wauconda IL 60084 r Dennis Brandt again tnis time proto type new LJMP Winsome Foreshort ening wing due wing tip being close camera Details column Ji~ K-LINE -4 $975AVAILABLE AT AMERICAS$525 FINEST HOBBY SHOPS DISTRIBUTED BY SAUflflHI ZNDVDERZZD7950 Sot Gobriel Rood cadoro CA 53422 905 466-1717 S Fiberglass Cowls BALSA USA Citabria Aerohalic Pro 2100 EAABPlane1950 J-3 Cab /4 scale wlengine SUB ISSUEA STRIES Aeronca Champion 40 1300 Citabria 40 size 1300 Aeronca Champ 1/4 scale . 2100 Citabria 1/4 scale 2100 Mr Malligan w/hlisters 3100 CARL GOLISEK KITS Seper Chipmank 2100 Electric Glider5 50 J-3 Cab1200 mini macu J3/J4 i/ scale.12 00 J3/J4 i/ scale1700 GREAT PLANES CAP 21 40 size 1300 CAP 21 60 size 1900 Electric Cah 750 Saper Aeromaster 1500 LAJICE BAR AIRCRAFT MPG F4U open flaps 2100 P-5123 00 RV329 00 MAUL AIRPLANE NEWS Aero Fox 11 00 Saper Hots 1100 Big Hots 1700 Knight Twister 3100 Liberty Sport B 2600 PICA Aeronca Sedan 1/ scale .. 1600 Cessna 192 scale 2100 Joegmeister w/blisters 1000 T2B 1/5 Scale 2500 Waco /s w/blisters 2200 SIB J-3 Cah w/engine 2100 Cuh Special PA 11 2100 KadetSr 1100 Keagar 950 Skybolt 1300 SCAlE PLANS MIS P1101K Gloster Gladiator scale .. 2600 PT19 e 2100 Super Marine SOB scale 2500 Floats 70 long pair12500 Wace YMF-5 /a scale2700 WE TECHNICAL SERVICES PLANS Beoter Wittman Racer 2900 Cessna AW 1700 Cartiss Falcon 31 00 Spad XIII Cl 2000 WORLD ENGINE CAP 21 40 size 1400 Draqon Lady 1900 Rabin Hood 09 2100 OTHER KITS ASTRO FLIGHTPnrtertield 900 DAVE PLATTJangmeister . 2100 MIDWESTSuper Hots 1150 RC KITS Star Daster 2100 Strive get good setup ma neuver wings should level constant al titude contestant announces Beginning now Maneuver complete Smooth corrections during flight coun ter adverse winds gusts sudden crosswinds should cause loss points Consider ation scale speed overall flying qualities model should given judges minds lack precision will result de duction points manner present flight should pleasure judge Dont make difficult vague Stand close judges can hear call program Fly program easy judges see Start finish ma neuvers stated rule book Read de scription to flown Avoid er rors specified possible During practice sessions fly program critique yourself Above honest self possible have friend help ask him flight went Work having crossover points right front Have maneuvers comfortable eye level altitude distance out judges folks want impress years ago told elderly gentle man get out something what THE BEST FUSELAGE JIG EVER PERIOD Provides Solid Support Accurate Building Rugged construction 7 Ply Aircraft Plywood Provides Lifetime use Two Sizes Available Regular Fuselages Up 6 Wide Jumbo lages Up 9 Wide Use Own Building Board Work Bench Base Mount Jig Station Uni-Strut Guide Rails Most Versatile SettJp contains complete Hardware Instructions Including Uni-Strut Information Box 4 Standard Jig Stations 91795 Box 4 Jumbo Jig Stations 1995 TwoS ft long Guide Rails including mounting nuts 2195 FIBERGLASS Dept MA Rt 1 Box 530 Goodview VA 24095 womunm Utmh lbs cut US add 5300 up ibugs Va nua add 4/a% ulus tax US USIBSES VISA MuteeCud COIL dm5 accepted add S2U ulpplg Cbu3S SiBIdS Kilt US wells *pIag rs uduelq lachde $100 US mini patams mId huldihlg PUnK inininsa wuinAnou 703-890-6017 9am 9 pm EDT Send Si 00 8-page brochure featuring hundreds cowls wheelpants radial cowls Brochure free order put winners work hard As step off soapbox Ill now announce Article com plete RC Soaring/Blakeslee Continued page 49 once week purchased two Roke kits Tony SB-l0 ASW-17 SB10 nearly complete real reason letter tell about fooling around Sagitta family Sailplanes discovery Missing Sagitta given broken 600 quickly repaired flew its pants off graduated 900 Cumic friend gave 600 also Sagitta XC al ways amazed no way get kit since has withdrawn Airtronics started looking Sagitta family Sailplanes comparing wingspans planforms polyhe dral angles tail moments etctrying under stand what made ships fly great Yes Eppler 205 common denominator 30/100 poly angles same missing link found compare wingspans ter need establish baseline before going further primary interests Sailplanes IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure aileron elevator rudder throw Takes guess work out trimming out airplane quality toot complete instructions logbook carrying case5795 -I PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass Sited nylon adjusters included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket 9695 Include 92 SOIltem UPS esidents Add 6% Sales Tan GATOR R/C PRODUCTS 3713 Pompano Dr acola FL 32514 1 476-8639 flying high long Cross-Country So tends make want large ships good pen etration qualities should explain did what did first Cumic Plusstretched span 130 118 increased stab area 15% Right out blocks ship thermalled exceptionally well penetrated beautifully Three dubbed Cumic Plus Plus have built flown very success fully However super thermaling ship it still ultimate X-C machine mainly because visibility problems high altitudes Now Missing Sagitta mic Plus 118-in wingspan Plus Plus 130 Sagitta XC 174 inwell measurements plus photograph 600 900 XC taken contest two years ago led believe something missing 140/150-in range After some initial layouts thought looked like Missing Sagitta would fit requirements fine X-C ma chine also outstanding all-out Thermal ship Sagitta XC big heavy tend requires assistance launching Cumic Plus Plus little too small wanted plane didnt need FAA checklist flythe famous KISS keep sinople stupid RMcM principle No high tech except airfoil Just rudder elevator spoilers photo shows both experimental Sailplanes Plus Plus smaller Missing Sagitta Ive named Cumic XC larger used Bob Sealy Jupiter fuselage stretched 6 same length Sagitta XC 57 wing three-piece bolt-on design fuselage cut out pro vide saddle area wing center section rest Michael Seligs 3021 improved E205 about 1 % thinner used air foil After new Sagitta family member de serves little sprucing up center panels 39 side con structed % x 3R-in main spars 0007 car bon fiber outer sides % x A-in drag spar also used Spoilers five bays wide Tip panels 36 making total span 150 Chord main panels 12 mak ing airfoil thick enough good strength tal area 1656 sq Construction typical D tube t selected strength noah spans 36 has NACA 0010 section thick root first flights went very successfully Cumic XC real dream ship fly grooves very well turns very stablelike giant Paragon S3021 seems have good speed range required X-C flying works lift well Sailplane weve flown Continued page 153 PLUG-IN WING ADJUSTER KIT Four glass filled nylon brackets included key wing panels front rear allow accurately adjust panel straight flight complete hardware & instructions5995 NG TUBE & SOOCETS Aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 dia x 2S 895 1diax2S 995 1diax3S1495 148 Model Aviation RC Soaring/Blakeslee Continued page 148 12-ft wing plus wide chord make easy see extreme altitudes Landings full spoilers Up elevator fairly easyit just mushes slowly no Dutch roll think its impressive majestic ship both air ground Perhaps nonstandard-size planes like Cumic XC economical kit doesnt stop being excep tional Sailplanes Whats next 192-in Super Sagitta XC S3021 airfoil After SB-b com pleted Wasnt marvelous piece engineering Alexs part seems quite logical once hear story demise Sailaire theres no kit US market know 135/150-in-span rangewhich makes good sized combination X-C AMA Thermal Duration contest ship Sailaire speedy enough X-C Sailplanes size both ailerons have popu lar British Open Class Thermal contests some years havent caught yet Any Airtronics reading LSF News President Bob Steele sent news re lease announcing LSF has new address PO Box 517 Winfield IL 60190 Bob said new address will provide better service mem bers less work LSF staff Please make change voucher youre think ing Source Rohacell letter just re ceived modeler may have heard Matt Gewain Im very serious FAI modeler fly mostly FlA Free Flight Towline Gliders know FlA best Ive also flown other events including RC Soaring off past 28 years flying FLA Ive good fortune make US team few times recent years well attend some other im portant international contests impressions acquired international competitions US 5-10 years behind advanced countries mod eling technology reflected both design construction methods wanted use state-of-the-art modeling materials tech niques saw Europe However found ma terials available except large quantities So started new company Com posite Structures Technology make supe rior modeling materials available everyone US case youre familiar Rohacell what spec sheet says about Rohacell light rigid high-quality poly methacrylimide foam available 19- 31-lb densities Most impressive its strengthto-weight characteristic compared balsa sty rene polyurethane foams Rohacells high compression modulus makes ideal use core high-strength composite structures pure white color can shaped stan dard woodworking techniques should hot-wired because harmful vapors may formed Most modeling adhesives suitable cluding epoxy polyester slow-cure cyanoa crylate Since Rohacell nonporous adhesives requiring evaporation cure like white glues recommended Matt sells Rohacell sheet thicknesses 10 15 20 30 40mm larger incre ments up 50mm thick Thicknesses up 2mm 31-lb density thicker sheets 19-lb den sity comes various lengths widths /2 x 2 ft up 2 x 4 ft Its cheap piece 2mm x 12 x 48 costs $1675 com mon use Rohacell sandwich core ma terial between fiberglass skins molded wings 100-in plane would need four sheetsor $68 worth Rohacell hey youre talk ing world-class Sailplanes quality efficiencynot costare considerations Matt also sells Kevlar fiberglass cloth Safe-T-Poxy epoxy resin mold release spray self-sticking synthetic rubber strip seal ing vacuum bags Because expert mod eler himself can rely Matts advice about best materials applications Send SASE information complete ordering de tails Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 telephone number 213 5427393 Strength glue joints Youve heard re mark several times before about good newsletter South Bay club Northern Cal ifornia Editor John Dvorak has knack get ting very informative articles members Recall two members Seth Dawson Rich Spicer 89 US F3B team re cent issue Silent Flyer article Reinhard Lahde Bob Bayard contained such important information about gluing carbon fiber felt bad passed along Sailplan ers process continuing some work us BB started strength wing spars felt need find best way glue strips carbon-fiber/epoxy laminates other other materials such spruce finding glue strengths aliphatic glue gap-filling cyanoacrylate fast 5-minute medium-speed 30-minute slow epoxies Slow epoxy kind sets up about three hours best left overnight harden strength interested shear strength ability glue joint resist sliding failure along glued surface typical test sample shown sketch have tested adhesion carbon fiber spruce balsa carbon fiber itself PullCarbonPull FiberSpruce Epoxy does bond well epoxy sur face carbon fiber/epoxy laminate lam inate surface partially unsanded Cyano somewhat tolerant some shiny surface spots laminate Best course sand laminate surfaces until no shiny spots remain results reported based no shiny spots preparation reason know about shiny spot problem too thorough sanding earlier phases inquiry best joints made least glue clamping two pieces excess glue squeezed out made test pieces thicker glue joints glue pulled apart chunks rather shearing along whole sur face Strength very lowno about well-made joint good joint between CF balsa fails pulling slivers wood off piece Bonds beDESIGNiD DIVGLOPID 35 0815 MACSIN THE LEADER IN COM PETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266/778 13677/8 14677/8 1567 16678 PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCHPRICE 534 634 72833/,456 833/4568 845667 94566/z77/z 10 4566 106W8W 106EW 114677A7748 115W 116EW 67 4W 125W 1256 1356 \J 1456 1556 164N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N5/N SERIES 400C 8I66777/4 9777 W WIDE BLADE EW EXTRA WIDE N NARROW March 1989 153 Tr ES 100 NEW WANNA RACE NORTHEAST AREA BEGINNER RACES 0-500 * FORM-i * FAI %j Instructions Club Programs Information Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 508 528-4043 203 673-2000 Length 0087 Span 6 Wing Area 750 ag 775 8SOa Waght Offered Super Deluxe Pm-Built Kit $45000 Completely Finished Model Call info & pricingVISAS MASTERCARD WELCOME aatS1M5Iw5ifofoAIfrs 406298-0311 FAXS 4082g8-6538 PLAIN CRADLE-2 Purchase local hobby shop order direct Completely Fuelproof Wide Fuselage Unbreakable es Flat Perfect Field Shop Same Day Shipping net aaUaN eat, muea fUrfuad Marty Berr 84 Stonefield Trail South Windsor CT 06074 Alao sae ad full satisfaction full refund ..... *316 par yard Lataat Japan. P3gm DesIgn Dalgned & Flown TOP Japan. Pilot Sultable FM AMA CI.. eRiSpa0m Rase itklsYra 4 ThlarcswaIisp hUndr & Phsoi Phesal tween two materials weakest cause balsa inherently weak tension Joints between CF spruce much stronger CF/balsa fail combination pulling some splinters out wood shearing some glue itself Joints between CF CF fail mostly separating gluelaminate interface well-sanded surfac es strength CF/CF joints close CF/spruce maybe bit Some joints taxed tension machine reengineered order break samples average breaking shear stress sam ples both CF/spruce CF/CF given table As table shows aliphatic glues make weakest bond should used carbon fiber Next come epoxies order cure time slowest being best Cya noacrylate strongest quite bit twice strong slow epoxy four times stronger fast epoxy summary want good joint tween CF laminate spruce other laminate sand until shiny spots disappear clean ac etone apply slow Zap sparingly clamp squeeze excess glue out Thats best joint thanks Reinhard Bob doing important research main use CF strengthen spruce wing spars tensile strength CF laminate normally much greater glue joint its important best bonding job can Otherwise CF little help aiding spar resist bending because glue joint lets go wing goes snap confess no idea slow cyano much better slow epoxy although Id done few informal peel tests both Another item about cyanos cure speed strength de crease sit around bench Unopened cyano lasts indefinitely freezer dont use up bottle few months its wise chuck Upcoming Cross-Country races X-C Racing fans will want make note two Eastern events Fifth Annual Sugarloaf Classic will held May 20-21 Dickerson MD about 40 miles northwest Washington DC Capital Area 154 Model Aviation Average Strength Gluepsi Aliphatic1220 Epoxy-fast 5-mm 1530 Epoxy-medium 30-mm 2190 Epoxy-slow 3-hr 3410 Cyanoacrylate6560 Send $1796 plus *200 shipping handling 1/4 1/3 Scale Sizes 6 plus *200 S & I-I THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great perfor mance Thermal Charger fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Soaring Association sponsor popular race fact its popular channels RC38 RC56 plus few new lower channels already taken Pat Flinn Detroit won last year Don Gougnnor/Terry Luckenback sec ond Sarget/Dickes/Sowder third less quarter mile info contact CD Guy Dickes 6331 Paddington Lane Centreville VA 22020 phone number 703 830-3631 Central Ontario Glider Group will try ob tain FAI sanction years Dash Cash make official F3H International contest Dash scheduled July 1-3 will held near Cookstown Ontario has popular event also deal year cant send entry form before April 15 will make fairer everyone have shot frequency However can get entry form right now contacting Neil Tinker 35 Cairnside Crescent Willowdale tario M2J 3M9 Canada Soaring high finance Over past few months Ive described Sailplaners wonderful features new Airtronics Vision 8SP radiothe ATRCS pro nounced A-Tracks computer encoder described January 1989 column Im excited about radio because ATRCS will eas ily tricks required multitask Soar ing question price comes up $850 list four servos sometimes look disappointment sets try explain its much considering what get also consid ering actual over-the-counter price retailers will almost assuredly substan tially less course what spend hobby personal thing whats bad per son too much another start talk ing over $500 theres no doubt impor tant investment territory worth proba bly consider Soaring main interestas serious sport just fly Gentle Ladies Oly us really need good four-channel set like Airtronics Vanguard Futaba Conquest can bought $150 less fact can fly lot very competitive Thermal Duration ships like Nats-winning Larry Jolly Model Products Meteor just three channels Bob Dodgsons Windsong ailerons flaps performs great four channels lot mechanical mixing have itch move up mid dle ground Randy Reynolds talked about last monthto fly ship ailerons flaps all-electronic coupling mixingthen Vi sion 8SP radio probably answer Its much less costly anything comparable US marketwith exception course Air tronics Module 7SP transmitter converted ATRCS $300 Control Systems Laborator ses give tale little perspective let re late some history first digital proportional ra dio set came Out about 1963 Bonnet Digi mite sold over $900 1965 bought first digital set Kraft six-channel cost bit over $600 same year also bought small Oldsmobile cost $3000 similar new car today would about $ 12000or four times much logic top-of-the-line ra dio should now sell over $2000 believe radio sets have improved lot over past 23 years cars have reason sophisticated radios relatively inexpensive today because competition space age computer-on-a-chip technology Have become spoiled being able buy very good reliable set about same price quality kit Id say answer yes fliers now buy whole radio set planes because price less receiver servos switch harness battery bought separately look way transmitter free Editors note might want read George M Myers Radio Tech nique column month since talks about very problem RMcM So moral story seriously en joy wonderful hobby/sport have ambi tion step up full-house plane cost first-class radio really much com pared lots other hobbies could get mixed up Besides live once Cash VISA Certified Cheek R/C EXTRAS 712-9434102 RR1 Box 28B Sergeant Bluff IA 51054 LMarch 1989 155 OPS orYS parts close phor 1-800-535-2568 Dealer Inquiries Invited SThe P Comfwacro% 7m&z4 r CARBON FIBER LAMINATES Aerospace Composite Products offers variety rigid carbon fiber/epoxy sheets add stiffness almost material- fiberglass foam bal sawood laminates can used reinforce foam wings leading trailing edges wing spars Carbon Fiber bonds easily slow setting cyanoacrylates 5-minute epoxies laminate can stripped narrower widths TYPICAL INSTALLATION CL-i 007 thick 1x48-$500 1x72-$70CNA FOAM WING CL-2 014 thick 1x48-$800 1x72-$11C0 Send SASE information additional sizes products Add $300 shipping handling Calif residents add 6% tax Overseas orders add 15%-Order COD send check money order IIThe source lightweight materials Stand Off Extra 230 Kits Scale Now Available Three Sizes 1/3 Scale Kit plus $15 shipping 30% Scale Kit plus $15 shipping 1/4 Scale Kit plus $10 shipping Also Available Weeks Special plus $15 ship PO Box 16621 Dept M Irvine CA 92714 714 250-1107
Edition: Model Aviation - 1989/03
Page Numbers: 48, 49, 148, 153, 154, 155
NATS NEWS Tom Culmsee Event Director Soaring years AMA Nats called let everyone know what schedule would Its quite bit different past years please read carefully Soaring Nats will run Monday July 18 through Saturday July 23 Flying will nice big field near Richland WA south east corner state rundown daily events Monday Cross-Country race AMA Sanc tioned flown provisional F3H rules Fliers X-C can go up fabulous Eagle Butte some Slope fun-flying Tuesday Hand-Launch event Transmitter check 100-500 pm Wednesday Scale F3B events Transmitter check 100-500 pm Thursday Unlimited Class event Friday Standard Class event Saturday Two-Meter Class event NSS Banquet will evening Clover land Inn awards will presented events Looks like great week flying sched ule adds two days Tuesday-through-Friday program used recent years New course Hand-Launch event chance partici pate Cross-Country race during Nats week Both types flying gaining popularity Nats exposure should really give big boost Also running Sailplane class per day will new should able get nearly same number flights before because three classes plus Scale have flown over four days past years sites facilities said first class expanded Soaring schedule op portunity families combine Nats vacation scenic Northwest have hunch will turn Out very popular Nats Sailplaners Better get entry early Ques tions can addressed SASE Tom Culm see 2190 SW 8th Dr Gresham OR 97080 telephone 503 667-4532 Wil Byers 632 Meadows Drive East Richland WA 99352 tele phone 509 627-5224 North Alabama Silent Fliers Ron Swinehart sent group photo taken 88 LSF South eastern Regional Contest wanted let know about host club new NASF Soaring club Huntsville AL Ron club pres ident said have great 58-acre sod farm hybrid Bermuda grass use flying field NASF has grown 33 members years time personal note Ron said has using ATRCS-modified Airtronics Module radio since August LJMP Meteor flat wings fully sheeted ailerons Flies great 95-oz 129 ozIsq ft wing load ing fliers north Alabama wishing con tact Ron address 8733 Edgehill Dr Hunts ville AL 35802 Database Soaring clubs really appreciate re ceiving word about new clubs because beginners often write asking live Possum Bottom get started Gliders know best way start Soaring get hooked up experienced fliers knew Soaring group near beginner Id able put him touch AMA has listing Chartered Clubs clubs arent chart ered some groups dont go formality organizing club point have sort Soaring group willing help beginners Id appreciate hearing New Larry Jolly Gliders photos Larrys partner Dennis Brandt taken F3B Team Selection Finals September Win some shown prototype model about 90% finished time Its good look ing 128-in-span plane fully sheeted builtup balsa wing ailerons flaps spoilers glass fuse lage slip-on nose cone T-tail fixed stab/separate elevator should flying now will get report Larry Dennis 1 12-in-span Cheetah available now UMP $150 list price plane 48 Model Aviation Radio Conoi Soaring Byron Blakeslee WInnebago Dr Sedalla CO 80135 Can count 27 pilots photo entrants 1988 1SF Southeastern Regional Contest hosted North Alabama Silent Fliers Club Winners 1SF plaques NASFs contest L-R Bob Sowder 1SF V Paul Behr Loren Banco Dick Renskers Tom Killough Wayne Blankenship Kendall McDonald Alex Dydulas Raleigh NC two Sailpianes based Airtronics Sagitta family calls smaller 130-in span Cumic Plus Plus larger 150-in span Cumic XC Photo above gives other look Cumic XC sports blue/white finish Alex tells designed months column beautiful proportions really looks right has same fuselage LJMP Pantera designed Don Chancy back late Sev enties Pantera 100-in-span polyhedral ship Eppler 205 airfoil still good plane can buy class Modified Pantera kits straight wings make excellent Standardclass aileron planes What Dennis Larry have done Cheetah improve good thing has same airfoil wings straight tapered fully sheeted side extended 6 rudder all-flying stab same Pan tera Dennis has flying prototypes two seasons says nicest handling Glider hes flown fully sheeted wings make effi cient also light Cheetah can climb out gopher belches according Den nis cant beat LJMP can contacted 5501 W Como Santa Ana CA 92703 phone 714 826-6861 missing Sagitta Alex Dydula Raleigh NC sent such interesting letter cant better print its entirety Take away Alex thought Id take time share some recent building experiences belong RISE Raleigh Independent Soaring Enthu siasts Club write articles club newslet ter kit reviews construction mods hints-and-tips kind stuff Ive active building flying Sailplanes over three years just having completed LSF Level Ill really got bug now have wide col lection kits fuselages two-car Sail plane factory garage know Tony Arnoux Miami fairly well converse him Continued page 148 Carry Largest Only Stock Kraft Parts World .. Kraft alive working KRAFT MIDWEST Au66orIzsd Warranty Service ILL FLY WHAT Fl FREOUENCY CONVERSION $1000 Disnoont Regal Rapait Moot Makes Models Converted Towng Dons Spectwm Anelyter Also Service ForACE U/C jjj] Only Full Time Servicenter Ihe Midwesl ~17 East Main St Northville Michin 48167 Upper Level-u1occor Phone IJIJJ-tUAJOJ Visa Meeterrd hlcorneMarch 1989 49 Dennis Brandt newest Larry Jolly Model Products kit Cheetah Its available right now Wingspan 112 Wings fully sheeted have ailerons spoilers Holds twelve gb-plugs U Made tough fuel resistant Protects elements dirt hard knocks Keeps gb-plugs neat organized easy find easy use See favorite Hobby Shop Du-Bro Products Inc Bonner Road Wauconda IL 60084 r Dennis Brandt again tnis time proto type new LJMP Winsome Foreshort ening wing due wing tip being close camera Details column Ji~ K-LINE -4 $975AVAILABLE AT AMERICAS$525 FINEST HOBBY SHOPS DISTRIBUTED BY SAUflflHI ZNDVDERZZD7950 Sot Gobriel Rood cadoro CA 53422 905 466-1717 S Fiberglass Cowls BALSA USA Citabria Aerohalic Pro 2100 EAABPlane1950 J-3 Cab /4 scale wlengine SUB ISSUEA STRIES Aeronca Champion 40 1300 Citabria 40 size 1300 Aeronca Champ 1/4 scale . 2100 Citabria 1/4 scale 2100 Mr Malligan w/hlisters 3100 CARL GOLISEK KITS Seper Chipmank 2100 Electric Glider5 50 J-3 Cab1200 mini macu J3/J4 i/ scale.12 00 J3/J4 i/ scale1700 GREAT PLANES CAP 21 40 size 1300 CAP 21 60 size 1900 Electric Cah 750 Saper Aeromaster 1500 LAJICE BAR AIRCRAFT MPG F4U open flaps 2100 P-5123 00 RV329 00 MAUL AIRPLANE NEWS Aero Fox 11 00 Saper Hots 1100 Big Hots 1700 Knight Twister 3100 Liberty Sport B 2600 PICA Aeronca Sedan 1/ scale .. 1600 Cessna 192 scale 2100 Joegmeister w/blisters 1000 T2B 1/5 Scale 2500 Waco /s w/blisters 2200 SIB J-3 Cah w/engine 2100 Cuh Special PA 11 2100 KadetSr 1100 Keagar 950 Skybolt 1300 SCAlE PLANS MIS P1101K Gloster Gladiator scale .. 2600 PT19 e 2100 Super Marine SOB scale 2500 Floats 70 long pair12500 Wace YMF-5 /a scale2700 WE TECHNICAL SERVICES PLANS Beoter Wittman Racer 2900 Cessna AW 1700 Cartiss Falcon 31 00 Spad XIII Cl 2000 WORLD ENGINE CAP 21 40 size 1400 Draqon Lady 1900 Rabin Hood 09 2100 OTHER KITS ASTRO FLIGHTPnrtertield 900 DAVE PLATTJangmeister . 2100 MIDWESTSuper Hots 1150 RC KITS Star Daster 2100 Strive get good setup ma neuver wings should level constant al titude contestant announces Beginning now Maneuver complete Smooth corrections during flight coun ter adverse winds gusts sudden crosswinds should cause loss points Consider ation scale speed overall flying qualities model should given judges minds lack precision will result de duction points manner present flight should pleasure judge Dont make difficult vague Stand close judges can hear call program Fly program easy judges see Start finish ma neuvers stated rule book Read de scription to flown Avoid er rors specified possible During practice sessions fly program critique yourself Above honest self possible have friend help ask him flight went Work having crossover points right front Have maneuvers comfortable eye level altitude distance out judges folks want impress years ago told elderly gentle man get out something what THE BEST FUSELAGE JIG EVER PERIOD Provides Solid Support Accurate Building Rugged construction 7 Ply Aircraft Plywood Provides Lifetime use Two Sizes Available Regular Fuselages Up 6 Wide Jumbo lages Up 9 Wide Use Own Building Board Work Bench Base Mount Jig Station Uni-Strut Guide Rails Most Versatile SettJp contains complete Hardware Instructions Including Uni-Strut Information Box 4 Standard Jig Stations 91795 Box 4 Jumbo Jig Stations 1995 TwoS ft long Guide Rails including mounting nuts 2195 FIBERGLASS Dept MA Rt 1 Box 530 Goodview VA 24095 womunm Utmh lbs cut US add 5300 up ibugs Va nua add 4/a% ulus tax US USIBSES VISA MuteeCud COIL dm5 accepted add S2U ulpplg Cbu3S SiBIdS Kilt US wells *pIag rs uduelq lachde $100 US mini patams mId huldihlg PUnK inininsa wuinAnou 703-890-6017 9am 9 pm EDT Send Si 00 8-page brochure featuring hundreds cowls wheelpants radial cowls Brochure free order put winners work hard As step off soapbox Ill now announce Article com plete RC Soaring/Blakeslee Continued page 49 once week purchased two Roke kits Tony SB-l0 ASW-17 SB10 nearly complete real reason letter tell about fooling around Sagitta family Sailplanes discovery Missing Sagitta given broken 600 quickly repaired flew its pants off graduated 900 Cumic friend gave 600 also Sagitta XC al ways amazed no way get kit since has withdrawn Airtronics started looking Sagitta family Sailplanes comparing wingspans planforms polyhe dral angles tail moments etctrying under stand what made ships fly great Yes Eppler 205 common denominator 30/100 poly angles same missing link found compare wingspans ter need establish baseline before going further primary interests Sailplanes IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure aileron elevator rudder throw Takes guess work out trimming out airplane quality toot complete instructions logbook carrying case5795 -I PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass Sited nylon adjusters included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket 9695 Include 92 SOIltem UPS esidents Add 6% Sales Tan GATOR R/C PRODUCTS 3713 Pompano Dr acola FL 32514 1 476-8639 flying high long Cross-Country So tends make want large ships good pen etration qualities should explain did what did first Cumic Plusstretched span 130 118 increased stab area 15% Right out blocks ship thermalled exceptionally well penetrated beautifully Three dubbed Cumic Plus Plus have built flown very success fully However super thermaling ship it still ultimate X-C machine mainly because visibility problems high altitudes Now Missing Sagitta mic Plus 118-in wingspan Plus Plus 130 Sagitta XC 174 inwell measurements plus photograph 600 900 XC taken contest two years ago led believe something missing 140/150-in range After some initial layouts thought looked like Missing Sagitta would fit requirements fine X-C ma chine also outstanding all-out Thermal ship Sagitta XC big heavy tend requires assistance launching Cumic Plus Plus little too small wanted plane didnt need FAA checklist flythe famous KISS keep sinople stupid RMcM principle No high tech except airfoil Just rudder elevator spoilers photo shows both experimental Sailplanes Plus Plus smaller Missing Sagitta Ive named Cumic XC larger used Bob Sealy Jupiter fuselage stretched 6 same length Sagitta XC 57 wing three-piece bolt-on design fuselage cut out pro vide saddle area wing center section rest Michael Seligs 3021 improved E205 about 1 % thinner used air foil After new Sagitta family member de serves little sprucing up center panels 39 side con structed % x 3R-in main spars 0007 car bon fiber outer sides % x A-in drag spar also used Spoilers five bays wide Tip panels 36 making total span 150 Chord main panels 12 mak ing airfoil thick enough good strength tal area 1656 sq Construction typical D tube t selected strength noah spans 36 has NACA 0010 section thick root first flights went very successfully Cumic XC real dream ship fly grooves very well turns very stablelike giant Paragon S3021 seems have good speed range required X-C flying works lift well Sailplane weve flown Continued page 153 PLUG-IN WING ADJUSTER KIT Four glass filled nylon brackets included key wing panels front rear allow accurately adjust panel straight flight complete hardware & instructions5995 NG TUBE & SOOCETS Aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 dia x 2S 895 1diax2S 995 1diax3S1495 148 Model Aviation RC Soaring/Blakeslee Continued page 148 12-ft wing plus wide chord make easy see extreme altitudes Landings full spoilers Up elevator fairly easyit just mushes slowly no Dutch roll think its impressive majestic ship both air ground Perhaps nonstandard-size planes like Cumic XC economical kit doesnt stop being excep tional Sailplanes Whats next 192-in Super Sagitta XC S3021 airfoil After SB-b com pleted Wasnt marvelous piece engineering Alexs part seems quite logical once hear story demise Sailaire theres no kit US market know 135/150-in-span rangewhich makes good sized combination X-C AMA Thermal Duration contest ship Sailaire speedy enough X-C Sailplanes size both ailerons have popu lar British Open Class Thermal contests some years havent caught yet Any Airtronics reading LSF News President Bob Steele sent news re lease announcing LSF has new address PO Box 517 Winfield IL 60190 Bob said new address will provide better service mem bers less work LSF staff Please make change voucher youre think ing Source Rohacell letter just re ceived modeler may have heard Matt Gewain Im very serious FAI modeler fly mostly FlA Free Flight Towline Gliders know FlA best Ive also flown other events including RC Soaring off past 28 years flying FLA Ive good fortune make US team few times recent years well attend some other im portant international contests impressions acquired international competitions US 5-10 years behind advanced countries mod eling technology reflected both design construction methods wanted use state-of-the-art modeling materials tech niques saw Europe However found ma terials available except large quantities So started new company Com posite Structures Technology make supe rior modeling materials available everyone US case youre familiar Rohacell what spec sheet says about Rohacell light rigid high-quality poly methacrylimide foam available 19- 31-lb densities Most impressive its strengthto-weight characteristic compared balsa sty rene polyurethane foams Rohacells high compression modulus makes ideal use core high-strength composite structures pure white color can shaped stan dard woodworking techniques should hot-wired because harmful vapors may formed Most modeling adhesives suitable cluding epoxy polyester slow-cure cyanoa crylate Since Rohacell nonporous adhesives requiring evaporation cure like white glues recommended Matt sells Rohacell sheet thicknesses 10 15 20 30 40mm larger incre ments up 50mm thick Thicknesses up 2mm 31-lb density thicker sheets 19-lb den sity comes various lengths widths /2 x 2 ft up 2 x 4 ft Its cheap piece 2mm x 12 x 48 costs $1675 com mon use Rohacell sandwich core ma terial between fiberglass skins molded wings 100-in plane would need four sheetsor $68 worth Rohacell hey youre talk ing world-class Sailplanes quality efficiencynot costare considerations Matt also sells Kevlar fiberglass cloth Safe-T-Poxy epoxy resin mold release spray self-sticking synthetic rubber strip seal ing vacuum bags Because expert mod eler himself can rely Matts advice about best materials applications Send SASE information complete ordering de tails Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 telephone number 213 5427393 Strength glue joints Youve heard re mark several times before about good newsletter South Bay club Northern Cal ifornia Editor John Dvorak has knack get ting very informative articles members Recall two members Seth Dawson Rich Spicer 89 US F3B team re cent issue Silent Flyer article Reinhard Lahde Bob Bayard contained such important information about gluing carbon fiber felt bad passed along Sailplan ers process continuing some work us BB started strength wing spars felt need find best way glue strips carbon-fiber/epoxy laminates other other materials such spruce finding glue strengths aliphatic glue gap-filling cyanoacrylate fast 5-minute medium-speed 30-minute slow epoxies Slow epoxy kind sets up about three hours best left overnight harden strength interested shear strength ability glue joint resist sliding failure along glued surface typical test sample shown sketch have tested adhesion carbon fiber spruce balsa carbon fiber itself PullCarbonPull FiberSpruce Epoxy does bond well epoxy sur face carbon fiber/epoxy laminate lam inate surface partially unsanded Cyano somewhat tolerant some shiny surface spots laminate Best course sand laminate surfaces until no shiny spots remain results reported based no shiny spots preparation reason know about shiny spot problem too thorough sanding earlier phases inquiry best joints made least glue clamping two pieces excess glue squeezed out made test pieces thicker glue joints glue pulled apart chunks rather shearing along whole sur face Strength very lowno about well-made joint good joint between CF balsa fails pulling slivers wood off piece Bonds beDESIGNiD DIVGLOPID 35 0815 MACSIN THE LEADER IN COM PETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266/778 13677/8 14677/8 1567 16678 PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCHPRICE 534 634 72833/,456 833/4568 845667 94566/z77/z 10 4566 106W8W 106EW 114677A7748 115W 116EW 67 4W 125W 1256 1356 \J 1456 1556 164N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N5/N SERIES 400C 8I66777/4 9777 W WIDE BLADE EW EXTRA WIDE N NARROW March 1989 153 Tr ES 100 NEW WANNA RACE NORTHEAST AREA BEGINNER RACES 0-500 * FORM-i * FAI %j Instructions Club Programs Information Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 508 528-4043 203 673-2000 Length 0087 Span 6 Wing Area 750 ag 775 8SOa Waght Offered Super Deluxe Pm-Built Kit $45000 Completely Finished Model Call info & pricingVISAS MASTERCARD WELCOME aatS1M5Iw5ifofoAIfrs 406298-0311 FAXS 4082g8-6538 PLAIN CRADLE-2 Purchase local hobby shop order direct Completely Fuelproof Wide Fuselage Unbreakable es Flat Perfect Field Shop Same Day Shipping net aaUaN eat, muea fUrfuad Marty Berr 84 Stonefield Trail South Windsor CT 06074 Alao sae ad full satisfaction full refund ..... *316 par yard Lataat Japan. P3gm DesIgn Dalgned & Flown TOP Japan. Pilot Sultable FM AMA CI.. eRiSpa0m Rase itklsYra 4 ThlarcswaIisp hUndr & Phsoi Phesal tween two materials weakest cause balsa inherently weak tension Joints between CF spruce much stronger CF/balsa fail combination pulling some splinters out wood shearing some glue itself Joints between CF CF fail mostly separating gluelaminate interface well-sanded surfac es strength CF/CF joints close CF/spruce maybe bit Some joints taxed tension machine reengineered order break samples average breaking shear stress sam ples both CF/spruce CF/CF given table As table shows aliphatic glues make weakest bond should used carbon fiber Next come epoxies order cure time slowest being best Cya noacrylate strongest quite bit twice strong slow epoxy four times stronger fast epoxy summary want good joint tween CF laminate spruce other laminate sand until shiny spots disappear clean ac etone apply slow Zap sparingly clamp squeeze excess glue out Thats best joint thanks Reinhard Bob doing important research main use CF strengthen spruce wing spars tensile strength CF laminate normally much greater glue joint its important best bonding job can Otherwise CF little help aiding spar resist bending because glue joint lets go wing goes snap confess no idea slow cyano much better slow epoxy although Id done few informal peel tests both Another item about cyanos cure speed strength de crease sit around bench Unopened cyano lasts indefinitely freezer dont use up bottle few months its wise chuck Upcoming Cross-Country races X-C Racing fans will want make note two Eastern events Fifth Annual Sugarloaf Classic will held May 20-21 Dickerson MD about 40 miles northwest Washington DC Capital Area 154 Model Aviation Average Strength Gluepsi Aliphatic1220 Epoxy-fast 5-mm 1530 Epoxy-medium 30-mm 2190 Epoxy-slow 3-hr 3410 Cyanoacrylate6560 Send $1796 plus *200 shipping handling 1/4 1/3 Scale Sizes 6 plus *200 S & I-I THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great perfor mance Thermal Charger fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Soaring Association sponsor popular race fact its popular channels RC38 RC56 plus few new lower channels already taken Pat Flinn Detroit won last year Don Gougnnor/Terry Luckenback sec ond Sarget/Dickes/Sowder third less quarter mile info contact CD Guy Dickes 6331 Paddington Lane Centreville VA 22020 phone number 703 830-3631 Central Ontario Glider Group will try ob tain FAI sanction years Dash Cash make official F3H International contest Dash scheduled July 1-3 will held near Cookstown Ontario has popular event also deal year cant send entry form before April 15 will make fairer everyone have shot frequency However can get entry form right now contacting Neil Tinker 35 Cairnside Crescent Willowdale tario M2J 3M9 Canada Soaring high finance Over past few months Ive described Sailplaners wonderful features new Airtronics Vision 8SP radiothe ATRCS pro nounced A-Tracks computer encoder described January 1989 column Im excited about radio because ATRCS will eas ily tricks required multitask Soar ing question price comes up $850 list four servos sometimes look disappointment sets try explain its much considering what get also consid ering actual over-the-counter price retailers will almost assuredly substan tially less course what spend hobby personal thing whats bad per son too much another start talk ing over $500 theres no doubt impor tant investment territory worth proba bly consider Soaring main interestas serious sport just fly Gentle Ladies Oly us really need good four-channel set like Airtronics Vanguard Futaba Conquest can bought $150 less fact can fly lot very competitive Thermal Duration ships like Nats-winning Larry Jolly Model Products Meteor just three channels Bob Dodgsons Windsong ailerons flaps performs great four channels lot mechanical mixing have itch move up mid dle ground Randy Reynolds talked about last monthto fly ship ailerons flaps all-electronic coupling mixingthen Vi sion 8SP radio probably answer Its much less costly anything comparable US marketwith exception course Air tronics Module 7SP transmitter converted ATRCS $300 Control Systems Laborator ses give tale little perspective let re late some history first digital proportional ra dio set came Out about 1963 Bonnet Digi mite sold over $900 1965 bought first digital set Kraft six-channel cost bit over $600 same year also bought small Oldsmobile cost $3000 similar new car today would about $ 12000or four times much logic top-of-the-line ra dio should now sell over $2000 believe radio sets have improved lot over past 23 years cars have reason sophisticated radios relatively inexpensive today because competition space age computer-on-a-chip technology Have become spoiled being able buy very good reliable set about same price quality kit Id say answer yes fliers now buy whole radio set planes because price less receiver servos switch harness battery bought separately look way transmitter free Editors note might want read George M Myers Radio Tech nique column month since talks about very problem RMcM So moral story seriously en joy wonderful hobby/sport have ambi tion step up full-house plane cost first-class radio really much com pared lots other hobbies could get mixed up Besides live once Cash VISA Certified Cheek R/C EXTRAS 712-9434102 RR1 Box 28B Sergeant Bluff IA 51054 LMarch 1989 155 OPS orYS parts close phor 1-800-535-2568 Dealer Inquiries Invited SThe P Comfwacro% 7m&z4 r CARBON FIBER LAMINATES Aerospace Composite Products offers variety rigid carbon fiber/epoxy sheets add stiffness almost material- fiberglass foam bal sawood laminates can used reinforce foam wings leading trailing edges wing spars Carbon Fiber bonds easily slow setting cyanoacrylates 5-minute epoxies laminate can stripped narrower widths TYPICAL INSTALLATION CL-i 007 thick 1x48-$500 1x72-$70CNA FOAM WING CL-2 014 thick 1x48-$800 1x72-$11C0 Send SASE information additional sizes products Add $300 shipping handling Calif residents add 6% tax Overseas orders add 15%-Order COD send check money order IIThe source lightweight materials Stand Off Extra 230 Kits Scale Now Available Three Sizes 1/3 Scale Kit plus $15 shipping 30% Scale Kit plus $15 shipping 1/4 Scale Kit plus $10 shipping Also Available Weeks Special plus $15 ship PO Box 16621 Dept M Irvine CA 92714 714 250-1107
Edition: Model Aviation - 1989/03
Page Numbers: 48, 49, 148, 153, 154, 155
NATS NEWS Tom Culmsee Event Director Soaring years AMA Nats called let everyone know what schedule would Its quite bit different past years please read carefully Soaring Nats will run Monday July 18 through Saturday July 23 Flying will nice big field near Richland WA south east corner state rundown daily events Monday Cross-Country race AMA Sanc tioned flown provisional F3H rules Fliers X-C can go up fabulous Eagle Butte some Slope fun-flying Tuesday Hand-Launch event Transmitter check 100-500 pm Wednesday Scale F3B events Transmitter check 100-500 pm Thursday Unlimited Class event Friday Standard Class event Saturday Two-Meter Class event NSS Banquet will evening Clover land Inn awards will presented events Looks like great week flying sched ule adds two days Tuesday-through-Friday program used recent years New course Hand-Launch event chance partici pate Cross-Country race during Nats week Both types flying gaining popularity Nats exposure should really give big boost Also running Sailplane class per day will new should able get nearly same number flights before because three classes plus Scale have flown over four days past years sites facilities said first class expanded Soaring schedule op portunity families combine Nats vacation scenic Northwest have hunch will turn Out very popular Nats Sailplaners Better get entry early Ques tions can addressed SASE Tom Culm see 2190 SW 8th Dr Gresham OR 97080 telephone 503 667-4532 Wil Byers 632 Meadows Drive East Richland WA 99352 tele phone 509 627-5224 North Alabama Silent Fliers Ron Swinehart sent group photo taken 88 LSF South eastern Regional Contest wanted let know about host club new NASF Soaring club Huntsville AL Ron club pres ident said have great 58-acre sod farm hybrid Bermuda grass use flying field NASF has grown 33 members years time personal note Ron said has using ATRCS-modified Airtronics Module radio since August LJMP Meteor flat wings fully sheeted ailerons Flies great 95-oz 129 ozIsq ft wing load ing fliers north Alabama wishing con tact Ron address 8733 Edgehill Dr Hunts ville AL 35802 Database Soaring clubs really appreciate re ceiving word about new clubs because beginners often write asking live Possum Bottom get started Gliders know best way start Soaring get hooked up experienced fliers knew Soaring group near beginner Id able put him touch AMA has listing Chartered Clubs clubs arent chart ered some groups dont go formality organizing club point have sort Soaring group willing help beginners Id appreciate hearing New Larry Jolly Gliders photos Larrys partner Dennis Brandt taken F3B Team Selection Finals September Win some shown prototype model about 90% finished time Its good look ing 128-in-span plane fully sheeted builtup balsa wing ailerons flaps spoilers glass fuse lage slip-on nose cone T-tail fixed stab/separate elevator should flying now will get report Larry Dennis 1 12-in-span Cheetah available now UMP $150 list price plane 48 Model Aviation Radio Conoi Soaring Byron Blakeslee WInnebago Dr Sedalla CO 80135 Can count 27 pilots photo entrants 1988 1SF Southeastern Regional Contest hosted North Alabama Silent Fliers Club Winners 1SF plaques NASFs contest L-R Bob Sowder 1SF V Paul Behr Loren Banco Dick Renskers Tom Killough Wayne Blankenship Kendall McDonald Alex Dydulas Raleigh NC two Sailpianes based Airtronics Sagitta family calls smaller 130-in span Cumic Plus Plus larger 150-in span Cumic XC Photo above gives other look Cumic XC sports blue/white finish Alex tells designed months column beautiful proportions really looks right has same fuselage LJMP Pantera designed Don Chancy back late Sev enties Pantera 100-in-span polyhedral ship Eppler 205 airfoil still good plane can buy class Modified Pantera kits straight wings make excellent Standardclass aileron planes What Dennis Larry have done Cheetah improve good thing has same airfoil wings straight tapered fully sheeted side extended 6 rudder all-flying stab same Pan tera Dennis has flying prototypes two seasons says nicest handling Glider hes flown fully sheeted wings make effi cient also light Cheetah can climb out gopher belches according Den nis cant beat LJMP can contacted 5501 W Como Santa Ana CA 92703 phone 714 826-6861 missing Sagitta Alex Dydula Raleigh NC sent such interesting letter cant better print its entirety Take away Alex thought Id take time share some recent building experiences belong RISE Raleigh Independent Soaring Enthu siasts Club write articles club newslet ter kit reviews construction mods hints-and-tips kind stuff Ive active building flying Sailplanes over three years just having completed LSF Level Ill really got bug now have wide col lection kits fuselages two-car Sail plane factory garage know Tony Arnoux Miami fairly well converse him Continued page 148 Carry Largest Only Stock Kraft Parts World .. Kraft alive working KRAFT MIDWEST Au66orIzsd Warranty Service ILL FLY WHAT Fl FREOUENCY CONVERSION $1000 Disnoont Regal Rapait Moot Makes Models Converted Towng Dons Spectwm Anelyter Also Service ForACE U/C jjj] Only Full Time Servicenter Ihe Midwesl ~17 East Main St Northville Michin 48167 Upper Level-u1occor Phone IJIJJ-tUAJOJ Visa Meeterrd hlcorneMarch 1989 49 Dennis Brandt newest Larry Jolly Model Products kit Cheetah Its available right now Wingspan 112 Wings fully sheeted have ailerons spoilers Holds twelve gb-plugs U Made tough fuel resistant Protects elements dirt hard knocks Keeps gb-plugs neat organized easy find easy use See favorite Hobby Shop Du-Bro Products Inc Bonner Road Wauconda IL 60084 r Dennis Brandt again tnis time proto type new LJMP Winsome Foreshort ening wing due wing tip being close camera Details column Ji~ K-LINE -4 $975AVAILABLE AT AMERICAS$525 FINEST HOBBY SHOPS DISTRIBUTED BY SAUflflHI ZNDVDERZZD7950 Sot Gobriel Rood cadoro CA 53422 905 466-1717 S Fiberglass Cowls BALSA USA Citabria Aerohalic Pro 2100 EAABPlane1950 J-3 Cab /4 scale wlengine SUB ISSUEA STRIES Aeronca Champion 40 1300 Citabria 40 size 1300 Aeronca Champ 1/4 scale . 2100 Citabria 1/4 scale 2100 Mr Malligan w/hlisters 3100 CARL GOLISEK KITS Seper Chipmank 2100 Electric Glider5 50 J-3 Cab1200 mini macu J3/J4 i/ scale.12 00 J3/J4 i/ scale1700 GREAT PLANES CAP 21 40 size 1300 CAP 21 60 size 1900 Electric Cah 750 Saper Aeromaster 1500 LAJICE BAR AIRCRAFT MPG F4U open flaps 2100 P-5123 00 RV329 00 MAUL AIRPLANE NEWS Aero Fox 11 00 Saper Hots 1100 Big Hots 1700 Knight Twister 3100 Liberty Sport B 2600 PICA Aeronca Sedan 1/ scale .. 1600 Cessna 192 scale 2100 Joegmeister w/blisters 1000 T2B 1/5 Scale 2500 Waco /s w/blisters 2200 SIB J-3 Cah w/engine 2100 Cuh Special PA 11 2100 KadetSr 1100 Keagar 950 Skybolt 1300 SCAlE PLANS MIS P1101K Gloster Gladiator scale .. 2600 PT19 e 2100 Super Marine SOB scale 2500 Floats 70 long pair12500 Wace YMF-5 /a scale2700 WE TECHNICAL SERVICES PLANS Beoter Wittman Racer 2900 Cessna AW 1700 Cartiss Falcon 31 00 Spad XIII Cl 2000 WORLD ENGINE CAP 21 40 size 1400 Draqon Lady 1900 Rabin Hood 09 2100 OTHER KITS ASTRO FLIGHTPnrtertield 900 DAVE PLATTJangmeister . 2100 MIDWESTSuper Hots 1150 RC KITS Star Daster 2100 Strive get good setup ma neuver wings should level constant al titude contestant announces Beginning now Maneuver complete Smooth corrections during flight coun ter adverse winds gusts sudden crosswinds should cause loss points Consider ation scale speed overall flying qualities model should given judges minds lack precision will result de duction points manner present flight should pleasure judge Dont make difficult vague Stand close judges can hear call program Fly program easy judges see Start finish ma neuvers stated rule book Read de scription to flown Avoid er rors specified possible During practice sessions fly program critique yourself Above honest self possible have friend help ask him flight went Work having crossover points right front Have maneuvers comfortable eye level altitude distance out judges folks want impress years ago told elderly gentle man get out something what THE BEST FUSELAGE JIG EVER PERIOD Provides Solid Support Accurate Building Rugged construction 7 Ply Aircraft Plywood Provides Lifetime use Two Sizes Available Regular Fuselages Up 6 Wide Jumbo lages Up 9 Wide Use Own Building Board Work Bench Base Mount Jig Station Uni-Strut Guide Rails Most Versatile SettJp contains complete Hardware Instructions Including Uni-Strut Information Box 4 Standard Jig Stations 91795 Box 4 Jumbo Jig Stations 1995 TwoS ft long Guide Rails including mounting nuts 2195 FIBERGLASS Dept MA Rt 1 Box 530 Goodview VA 24095 womunm Utmh lbs cut US add 5300 up ibugs Va nua add 4/a% ulus tax US USIBSES VISA MuteeCud COIL dm5 accepted add S2U ulpplg Cbu3S SiBIdS Kilt US wells *pIag rs uduelq lachde $100 US mini patams mId huldihlg PUnK inininsa wuinAnou 703-890-6017 9am 9 pm EDT Send Si 00 8-page brochure featuring hundreds cowls wheelpants radial cowls Brochure free order put winners work hard As step off soapbox Ill now announce Article com plete RC Soaring/Blakeslee Continued page 49 once week purchased two Roke kits Tony SB-l0 ASW-17 SB10 nearly complete real reason letter tell about fooling around Sagitta family Sailplanes discovery Missing Sagitta given broken 600 quickly repaired flew its pants off graduated 900 Cumic friend gave 600 also Sagitta XC al ways amazed no way get kit since has withdrawn Airtronics started looking Sagitta family Sailplanes comparing wingspans planforms polyhe dral angles tail moments etctrying under stand what made ships fly great Yes Eppler 205 common denominator 30/100 poly angles same missing link found compare wingspans ter need establish baseline before going further primary interests Sailplanes IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure aileron elevator rudder throw Takes guess work out trimming out airplane quality toot complete instructions logbook carrying case5795 -I PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass Sited nylon adjusters included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket 9695 Include 92 SOIltem UPS esidents Add 6% Sales Tan GATOR R/C PRODUCTS 3713 Pompano Dr acola FL 32514 1 476-8639 flying high long Cross-Country So tends make want large ships good pen etration qualities should explain did what did first Cumic Plusstretched span 130 118 increased stab area 15% Right out blocks ship thermalled exceptionally well penetrated beautifully Three dubbed Cumic Plus Plus have built flown very success fully However super thermaling ship it still ultimate X-C machine mainly because visibility problems high altitudes Now Missing Sagitta mic Plus 118-in wingspan Plus Plus 130 Sagitta XC 174 inwell measurements plus photograph 600 900 XC taken contest two years ago led believe something missing 140/150-in range After some initial layouts thought looked like Missing Sagitta would fit requirements fine X-C ma chine also outstanding all-out Thermal ship Sagitta XC big heavy tend requires assistance launching Cumic Plus Plus little too small wanted plane didnt need FAA checklist flythe famous KISS keep sinople stupid RMcM principle No high tech except airfoil Just rudder elevator spoilers photo shows both experimental Sailplanes Plus Plus smaller Missing Sagitta Ive named Cumic XC larger used Bob Sealy Jupiter fuselage stretched 6 same length Sagitta XC 57 wing three-piece bolt-on design fuselage cut out pro vide saddle area wing center section rest Michael Seligs 3021 improved E205 about 1 % thinner used air foil After new Sagitta family member de serves little sprucing up center panels 39 side con structed % x 3R-in main spars 0007 car bon fiber outer sides % x A-in drag spar also used Spoilers five bays wide Tip panels 36 making total span 150 Chord main panels 12 mak ing airfoil thick enough good strength tal area 1656 sq Construction typical D tube t selected strength noah spans 36 has NACA 0010 section thick root first flights went very successfully Cumic XC real dream ship fly grooves very well turns very stablelike giant Paragon S3021 seems have good speed range required X-C flying works lift well Sailplane weve flown Continued page 153 PLUG-IN WING ADJUSTER KIT Four glass filled nylon brackets included key wing panels front rear allow accurately adjust panel straight flight complete hardware & instructions5995 NG TUBE & SOOCETS Aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 dia x 2S 895 1diax2S 995 1diax3S1495 148 Model Aviation RC Soaring/Blakeslee Continued page 148 12-ft wing plus wide chord make easy see extreme altitudes Landings full spoilers Up elevator fairly easyit just mushes slowly no Dutch roll think its impressive majestic ship both air ground Perhaps nonstandard-size planes like Cumic XC economical kit doesnt stop being excep tional Sailplanes Whats next 192-in Super Sagitta XC S3021 airfoil After SB-b com pleted Wasnt marvelous piece engineering Alexs part seems quite logical once hear story demise Sailaire theres no kit US market know 135/150-in-span rangewhich makes good sized combination X-C AMA Thermal Duration contest ship Sailaire speedy enough X-C Sailplanes size both ailerons have popu lar British Open Class Thermal contests some years havent caught yet Any Airtronics reading LSF News President Bob Steele sent news re lease announcing LSF has new address PO Box 517 Winfield IL 60190 Bob said new address will provide better service mem bers less work LSF staff Please make change voucher youre think ing Source Rohacell letter just re ceived modeler may have heard Matt Gewain Im very serious FAI modeler fly mostly FlA Free Flight Towline Gliders know FlA best Ive also flown other events including RC Soaring off past 28 years flying FLA Ive good fortune make US team few times recent years well attend some other im portant international contests impressions acquired international competitions US 5-10 years behind advanced countries mod eling technology reflected both design construction methods wanted use state-of-the-art modeling materials tech niques saw Europe However found ma terials available except large quantities So started new company Com posite Structures Technology make supe rior modeling materials available everyone US case youre familiar Rohacell what spec sheet says about Rohacell light rigid high-quality poly methacrylimide foam available 19- 31-lb densities Most impressive its strengthto-weight characteristic compared balsa sty rene polyurethane foams Rohacells high compression modulus makes ideal use core high-strength composite structures pure white color can shaped stan dard woodworking techniques should hot-wired because harmful vapors may formed Most modeling adhesives suitable cluding epoxy polyester slow-cure cyanoa crylate Since Rohacell nonporous adhesives requiring evaporation cure like white glues recommended Matt sells Rohacell sheet thicknesses 10 15 20 30 40mm larger incre ments up 50mm thick Thicknesses up 2mm 31-lb density thicker sheets 19-lb den sity comes various lengths widths /2 x 2 ft up 2 x 4 ft Its cheap piece 2mm x 12 x 48 costs $1675 com mon use Rohacell sandwich core ma terial between fiberglass skins molded wings 100-in plane would need four sheetsor $68 worth Rohacell hey youre talk ing world-class Sailplanes quality efficiencynot costare considerations Matt also sells Kevlar fiberglass cloth Safe-T-Poxy epoxy resin mold release spray self-sticking synthetic rubber strip seal ing vacuum bags Because expert mod eler himself can rely Matts advice about best materials applications Send SASE information complete ordering de tails Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 telephone number 213 5427393 Strength glue joints Youve heard re mark several times before about good newsletter South Bay club Northern Cal ifornia Editor John Dvorak has knack get ting very informative articles members Recall two members Seth Dawson Rich Spicer 89 US F3B team re cent issue Silent Flyer article Reinhard Lahde Bob Bayard contained such important information about gluing carbon fiber felt bad passed along Sailplan ers process continuing some work us BB started strength wing spars felt need find best way glue strips carbon-fiber/epoxy laminates other other materials such spruce finding glue strengths aliphatic glue gap-filling cyanoacrylate fast 5-minute medium-speed 30-minute slow epoxies Slow epoxy kind sets up about three hours best left overnight harden strength interested shear strength ability glue joint resist sliding failure along glued surface typical test sample shown sketch have tested adhesion carbon fiber spruce balsa carbon fiber itself PullCarbonPull FiberSpruce Epoxy does bond well epoxy sur face carbon fiber/epoxy laminate lam inate surface partially unsanded Cyano somewhat tolerant some shiny surface spots laminate Best course sand laminate surfaces until no shiny spots remain results reported based no shiny spots preparation reason know about shiny spot problem too thorough sanding earlier phases inquiry best joints made least glue clamping two pieces excess glue squeezed out made test pieces thicker glue joints glue pulled apart chunks rather shearing along whole sur face Strength very lowno about well-made joint good joint between CF balsa fails pulling slivers wood off piece Bonds beDESIGNiD DIVGLOPID 35 0815 MACSIN THE LEADER IN COM PETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266/778 13677/8 14677/8 1567 16678 PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCHPRICE 534 634 72833/,456 833/4568 845667 94566/z77/z 10 4566 106W8W 106EW 114677A7748 115W 116EW 67 4W 125W 1256 1356 \J 1456 1556 164N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N5/N SERIES 400C 8I66777/4 9777 W WIDE BLADE EW EXTRA WIDE N NARROW March 1989 153 Tr ES 100 NEW WANNA RACE NORTHEAST AREA BEGINNER RACES 0-500 * FORM-i * FAI %j Instructions Club Programs Information Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 508 528-4043 203 673-2000 Length 0087 Span 6 Wing Area 750 ag 775 8SOa Waght Offered Super Deluxe Pm-Built Kit $45000 Completely Finished Model Call info & pricingVISAS MASTERCARD WELCOME aatS1M5Iw5ifofoAIfrs 406298-0311 FAXS 4082g8-6538 PLAIN CRADLE-2 Purchase local hobby shop order direct Completely Fuelproof Wide Fuselage Unbreakable es Flat Perfect Field Shop Same Day Shipping net aaUaN eat, muea fUrfuad Marty Berr 84 Stonefield Trail South Windsor CT 06074 Alao sae ad full satisfaction full refund ..... *316 par yard Lataat Japan. P3gm DesIgn Dalgned & Flown TOP Japan. Pilot Sultable FM AMA CI.. eRiSpa0m Rase itklsYra 4 ThlarcswaIisp hUndr & Phsoi Phesal tween two materials weakest cause balsa inherently weak tension Joints between CF spruce much stronger CF/balsa fail combination pulling some splinters out wood shearing some glue itself Joints between CF CF fail mostly separating gluelaminate interface well-sanded surfac es strength CF/CF joints close CF/spruce maybe bit Some joints taxed tension machine reengineered order break samples average breaking shear stress sam ples both CF/spruce CF/CF given table As table shows aliphatic glues make weakest bond should used carbon fiber Next come epoxies order cure time slowest being best Cya noacrylate strongest quite bit twice strong slow epoxy four times stronger fast epoxy summary want good joint tween CF laminate spruce other laminate sand until shiny spots disappear clean ac etone apply slow Zap sparingly clamp squeeze excess glue out Thats best joint thanks Reinhard Bob doing important research main use CF strengthen spruce wing spars tensile strength CF laminate normally much greater glue joint its important best bonding job can Otherwise CF little help aiding spar resist bending because glue joint lets go wing goes snap confess no idea slow cyano much better slow epoxy although Id done few informal peel tests both Another item about cyanos cure speed strength de crease sit around bench Unopened cyano lasts indefinitely freezer dont use up bottle few months its wise chuck Upcoming Cross-Country races X-C Racing fans will want make note two Eastern events Fifth Annual Sugarloaf Classic will held May 20-21 Dickerson MD about 40 miles northwest Washington DC Capital Area 154 Model Aviation Average Strength Gluepsi Aliphatic1220 Epoxy-fast 5-mm 1530 Epoxy-medium 30-mm 2190 Epoxy-slow 3-hr 3410 Cyanoacrylate6560 Send $1796 plus *200 shipping handling 1/4 1/3 Scale Sizes 6 plus *200 S & I-I THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great perfor mance Thermal Charger fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Soaring Association sponsor popular race fact its popular channels RC38 RC56 plus few new lower channels already taken Pat Flinn Detroit won last year Don Gougnnor/Terry Luckenback sec ond Sarget/Dickes/Sowder third less quarter mile info contact CD Guy Dickes 6331 Paddington Lane Centreville VA 22020 phone number 703 830-3631 Central Ontario Glider Group will try ob tain FAI sanction years Dash Cash make official F3H International contest Dash scheduled July 1-3 will held near Cookstown Ontario has popular event also deal year cant send entry form before April 15 will make fairer everyone have shot frequency However can get entry form right now contacting Neil Tinker 35 Cairnside Crescent Willowdale tario M2J 3M9 Canada Soaring high finance Over past few months Ive described Sailplaners wonderful features new Airtronics Vision 8SP radiothe ATRCS pro nounced A-Tracks computer encoder described January 1989 column Im excited about radio because ATRCS will eas ily tricks required multitask Soar ing question price comes up $850 list four servos sometimes look disappointment sets try explain its much considering what get also consid ering actual over-the-counter price retailers will almost assuredly substan tially less course what spend hobby personal thing whats bad per son too much another start talk ing over $500 theres no doubt impor tant investment territory worth proba bly consider Soaring main interestas serious sport just fly Gentle Ladies Oly us really need good four-channel set like Airtronics Vanguard Futaba Conquest can bought $150 less fact can fly lot very competitive Thermal Duration ships like Nats-winning Larry Jolly Model Products Meteor just three channels Bob Dodgsons Windsong ailerons flaps performs great four channels lot mechanical mixing have itch move up mid dle ground Randy Reynolds talked about last monthto fly ship ailerons flaps all-electronic coupling mixingthen Vi sion 8SP radio probably answer Its much less costly anything comparable US marketwith exception course Air tronics Module 7SP transmitter converted ATRCS $300 Control Systems Laborator ses give tale little perspective let re late some history first digital proportional ra dio set came Out about 1963 Bonnet Digi mite sold over $900 1965 bought first digital set Kraft six-channel cost bit over $600 same year also bought small Oldsmobile cost $3000 similar new car today would about $ 12000or four times much logic top-of-the-line ra dio should now sell over $2000 believe radio sets have improved lot over past 23 years cars have reason sophisticated radios relatively inexpensive today because competition space age computer-on-a-chip technology Have become spoiled being able buy very good reliable set about same price quality kit Id say answer yes fliers now buy whole radio set planes because price less receiver servos switch harness battery bought separately look way transmitter free Editors note might want read George M Myers Radio Tech nique column month since talks about very problem RMcM So moral story seriously en joy wonderful hobby/sport have ambi tion step up full-house plane cost first-class radio really much com pared lots other hobbies could get mixed up Besides live once Cash VISA Certified Cheek R/C EXTRAS 712-9434102 RR1 Box 28B Sergeant Bluff IA 51054 LMarch 1989 155 OPS orYS parts close phor 1-800-535-2568 Dealer Inquiries Invited SThe P Comfwacro% 7m&z4 r CARBON FIBER LAMINATES Aerospace Composite Products offers variety rigid carbon fiber/epoxy sheets add stiffness almost material- fiberglass foam bal sawood laminates can used reinforce foam wings leading trailing edges wing spars Carbon Fiber bonds easily slow setting cyanoacrylates 5-minute epoxies laminate can stripped narrower widths TYPICAL INSTALLATION CL-i 007 thick 1x48-$500 1x72-$70CNA FOAM WING CL-2 014 thick 1x48-$800 1x72-$11C0 Send SASE information additional sizes products Add $300 shipping handling Calif residents add 6% tax Overseas orders add 15%-Order COD send check money order IIThe source lightweight materials Stand Off Extra 230 Kits Scale Now Available Three Sizes 1/3 Scale Kit plus $15 shipping 30% Scale Kit plus $15 shipping 1/4 Scale Kit plus $10 shipping Also Available Weeks Special plus $15 ship PO Box 16621 Dept M Irvine CA 92714 714 250-1107
Edition: Model Aviation - 1989/03
Page Numbers: 48, 49, 148, 153, 154, 155
NATS NEWS Tom Culmsee Event Director Soaring years AMA Nats called let everyone know what schedule would Its quite bit different past years please read carefully Soaring Nats will run Monday July 18 through Saturday July 23 Flying will nice big field near Richland WA south east corner state rundown daily events Monday Cross-Country race AMA Sanc tioned flown provisional F3H rules Fliers X-C can go up fabulous Eagle Butte some Slope fun-flying Tuesday Hand-Launch event Transmitter check 100-500 pm Wednesday Scale F3B events Transmitter check 100-500 pm Thursday Unlimited Class event Friday Standard Class event Saturday Two-Meter Class event NSS Banquet will evening Clover land Inn awards will presented events Looks like great week flying sched ule adds two days Tuesday-through-Friday program used recent years New course Hand-Launch event chance partici pate Cross-Country race during Nats week Both types flying gaining popularity Nats exposure should really give big boost Also running Sailplane class per day will new should able get nearly same number flights before because three classes plus Scale have flown over four days past years sites facilities said first class expanded Soaring schedule op portunity families combine Nats vacation scenic Northwest have hunch will turn Out very popular Nats Sailplaners Better get entry early Ques tions can addressed SASE Tom Culm see 2190 SW 8th Dr Gresham OR 97080 telephone 503 667-4532 Wil Byers 632 Meadows Drive East Richland WA 99352 tele phone 509 627-5224 North Alabama Silent Fliers Ron Swinehart sent group photo taken 88 LSF South eastern Regional Contest wanted let know about host club new NASF Soaring club Huntsville AL Ron club pres ident said have great 58-acre sod farm hybrid Bermuda grass use flying field NASF has grown 33 members years time personal note Ron said has using ATRCS-modified Airtronics Module radio since August LJMP Meteor flat wings fully sheeted ailerons Flies great 95-oz 129 ozIsq ft wing load ing fliers north Alabama wishing con tact Ron address 8733 Edgehill Dr Hunts ville AL 35802 Database Soaring clubs really appreciate re ceiving word about new clubs because beginners often write asking live Possum Bottom get started Gliders know best way start Soaring get hooked up experienced fliers knew Soaring group near beginner Id able put him touch AMA has listing Chartered Clubs clubs arent chart ered some groups dont go formality organizing club point have sort Soaring group willing help beginners Id appreciate hearing New Larry Jolly Gliders photos Larrys partner Dennis Brandt taken F3B Team Selection Finals September Win some shown prototype model about 90% finished time Its good look ing 128-in-span plane fully sheeted builtup balsa wing ailerons flaps spoilers glass fuse lage slip-on nose cone T-tail fixed stab/separate elevator should flying now will get report Larry Dennis 1 12-in-span Cheetah available now UMP $150 list price plane 48 Model Aviation Radio Conoi Soaring Byron Blakeslee WInnebago Dr Sedalla CO 80135 Can count 27 pilots photo entrants 1988 1SF Southeastern Regional Contest hosted North Alabama Silent Fliers Club Winners 1SF plaques NASFs contest L-R Bob Sowder 1SF V Paul Behr Loren Banco Dick Renskers Tom Killough Wayne Blankenship Kendall McDonald Alex Dydulas Raleigh NC two Sailpianes based Airtronics Sagitta family calls smaller 130-in span Cumic Plus Plus larger 150-in span Cumic XC Photo above gives other look Cumic XC sports blue/white finish Alex tells designed months column beautiful proportions really looks right has same fuselage LJMP Pantera designed Don Chancy back late Sev enties Pantera 100-in-span polyhedral ship Eppler 205 airfoil still good plane can buy class Modified Pantera kits straight wings make excellent Standardclass aileron planes What Dennis Larry have done Cheetah improve good thing has same airfoil wings straight tapered fully sheeted side extended 6 rudder all-flying stab same Pan tera Dennis has flying prototypes two seasons says nicest handling Glider hes flown fully sheeted wings make effi cient also light Cheetah can climb out gopher belches according Den nis cant beat LJMP can contacted 5501 W Como Santa Ana CA 92703 phone 714 826-6861 missing Sagitta Alex Dydula Raleigh NC sent such interesting letter cant better print its entirety Take away Alex thought Id take time share some recent building experiences belong RISE Raleigh Independent Soaring Enthu siasts Club write articles club newslet ter kit reviews construction mods hints-and-tips kind stuff Ive active building flying Sailplanes over three years just having completed LSF Level Ill really got bug now have wide col lection kits fuselages two-car Sail plane factory garage know Tony Arnoux Miami fairly well converse him Continued page 148 Carry Largest Only Stock Kraft Parts World .. Kraft alive working KRAFT MIDWEST Au66orIzsd Warranty Service ILL FLY WHAT Fl FREOUENCY CONVERSION $1000 Disnoont Regal Rapait Moot Makes Models Converted Towng Dons Spectwm Anelyter Also Service ForACE U/C jjj] Only Full Time Servicenter Ihe Midwesl ~17 East Main St Northville Michin 48167 Upper Level-u1occor Phone IJIJJ-tUAJOJ Visa Meeterrd hlcorneMarch 1989 49 Dennis Brandt newest Larry Jolly Model Products kit Cheetah Its available right now Wingspan 112 Wings fully sheeted have ailerons spoilers Holds twelve gb-plugs U Made tough fuel resistant Protects elements dirt hard knocks Keeps gb-plugs neat organized easy find easy use See favorite Hobby Shop Du-Bro Products Inc Bonner Road Wauconda IL 60084 r Dennis Brandt again tnis time proto type new LJMP Winsome Foreshort ening wing due wing tip being close camera Details column Ji~ K-LINE -4 $975AVAILABLE AT AMERICAS$525 FINEST HOBBY SHOPS DISTRIBUTED BY SAUflflHI ZNDVDERZZD7950 Sot Gobriel Rood cadoro CA 53422 905 466-1717 S Fiberglass Cowls BALSA USA Citabria Aerohalic Pro 2100 EAABPlane1950 J-3 Cab /4 scale wlengine SUB ISSUEA STRIES Aeronca Champion 40 1300 Citabria 40 size 1300 Aeronca Champ 1/4 scale . 2100 Citabria 1/4 scale 2100 Mr Malligan w/hlisters 3100 CARL GOLISEK KITS Seper Chipmank 2100 Electric Glider5 50 J-3 Cab1200 mini macu J3/J4 i/ scale.12 00 J3/J4 i/ scale1700 GREAT PLANES CAP 21 40 size 1300 CAP 21 60 size 1900 Electric Cah 750 Saper Aeromaster 1500 LAJICE BAR AIRCRAFT MPG F4U open flaps 2100 P-5123 00 RV329 00 MAUL AIRPLANE NEWS Aero Fox 11 00 Saper Hots 1100 Big Hots 1700 Knight Twister 3100 Liberty Sport B 2600 PICA Aeronca Sedan 1/ scale .. 1600 Cessna 192 scale 2100 Joegmeister w/blisters 1000 T2B 1/5 Scale 2500 Waco /s w/blisters 2200 SIB J-3 Cah w/engine 2100 Cuh Special PA 11 2100 KadetSr 1100 Keagar 950 Skybolt 1300 SCAlE PLANS MIS P1101K Gloster Gladiator scale .. 2600 PT19 e 2100 Super Marine SOB scale 2500 Floats 70 long pair12500 Wace YMF-5 /a scale2700 WE TECHNICAL SERVICES PLANS Beoter Wittman Racer 2900 Cessna AW 1700 Cartiss Falcon 31 00 Spad XIII Cl 2000 WORLD ENGINE CAP 21 40 size 1400 Draqon Lady 1900 Rabin Hood 09 2100 OTHER KITS ASTRO FLIGHTPnrtertield 900 DAVE PLATTJangmeister . 2100 MIDWESTSuper Hots 1150 RC KITS Star Daster 2100 Strive get good setup ma neuver wings should level constant al titude contestant announces Beginning now Maneuver complete Smooth corrections during flight coun ter adverse winds gusts sudden crosswinds should cause loss points Consider ation scale speed overall flying qualities model should given judges minds lack precision will result de duction points manner present flight should pleasure judge Dont make difficult vague Stand close judges can hear call program Fly program easy judges see Start finish ma neuvers stated rule book Read de scription to flown Avoid er rors specified possible During practice sessions fly program critique yourself Above honest self possible have friend help ask him flight went Work having crossover points right front Have maneuvers comfortable eye level altitude distance out judges folks want impress years ago told elderly gentle man get out something what THE BEST FUSELAGE JIG EVER PERIOD Provides Solid Support Accurate Building Rugged construction 7 Ply Aircraft Plywood Provides Lifetime use Two Sizes Available Regular Fuselages Up 6 Wide Jumbo lages Up 9 Wide Use Own Building Board Work Bench Base Mount Jig Station Uni-Strut Guide Rails Most Versatile SettJp contains complete Hardware Instructions Including Uni-Strut Information Box 4 Standard Jig Stations 91795 Box 4 Jumbo Jig Stations 1995 TwoS ft long Guide Rails including mounting nuts 2195 FIBERGLASS Dept MA Rt 1 Box 530 Goodview VA 24095 womunm Utmh lbs cut US add 5300 up ibugs Va nua add 4/a% ulus tax US USIBSES VISA MuteeCud COIL dm5 accepted add S2U ulpplg Cbu3S SiBIdS Kilt US wells *pIag rs uduelq lachde $100 US mini patams mId huldihlg PUnK inininsa wuinAnou 703-890-6017 9am 9 pm EDT Send Si 00 8-page brochure featuring hundreds cowls wheelpants radial cowls Brochure free order put winners work hard As step off soapbox Ill now announce Article com plete RC Soaring/Blakeslee Continued page 49 once week purchased two Roke kits Tony SB-l0 ASW-17 SB10 nearly complete real reason letter tell about fooling around Sagitta family Sailplanes discovery Missing Sagitta given broken 600 quickly repaired flew its pants off graduated 900 Cumic friend gave 600 also Sagitta XC al ways amazed no way get kit since has withdrawn Airtronics started looking Sagitta family Sailplanes comparing wingspans planforms polyhe dral angles tail moments etctrying under stand what made ships fly great Yes Eppler 205 common denominator 30/100 poly angles same missing link found compare wingspans ter need establish baseline before going further primary interests Sailplanes IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure aileron elevator rudder throw Takes guess work out trimming out airplane quality toot complete instructions logbook carrying case5795 -I PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass Sited nylon adjusters included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket 9695 Include 92 SOIltem UPS esidents Add 6% Sales Tan GATOR R/C PRODUCTS 3713 Pompano Dr acola FL 32514 1 476-8639 flying high long Cross-Country So tends make want large ships good pen etration qualities should explain did what did first Cumic Plusstretched span 130 118 increased stab area 15% Right out blocks ship thermalled exceptionally well penetrated beautifully Three dubbed Cumic Plus Plus have built flown very success fully However super thermaling ship it still ultimate X-C machine mainly because visibility problems high altitudes Now Missing Sagitta mic Plus 118-in wingspan Plus Plus 130 Sagitta XC 174 inwell measurements plus photograph 600 900 XC taken contest two years ago led believe something missing 140/150-in range After some initial layouts thought looked like Missing Sagitta would fit requirements fine X-C ma chine also outstanding all-out Thermal ship Sagitta XC big heavy tend requires assistance launching Cumic Plus Plus little too small wanted plane didnt need FAA checklist flythe famous KISS keep sinople stupid RMcM principle No high tech except airfoil Just rudder elevator spoilers photo shows both experimental Sailplanes Plus Plus smaller Missing Sagitta Ive named Cumic XC larger used Bob Sealy Jupiter fuselage stretched 6 same length Sagitta XC 57 wing three-piece bolt-on design fuselage cut out pro vide saddle area wing center section rest Michael Seligs 3021 improved E205 about 1 % thinner used air foil After new Sagitta family member de serves little sprucing up center panels 39 side con structed % x 3R-in main spars 0007 car bon fiber outer sides % x A-in drag spar also used Spoilers five bays wide Tip panels 36 making total span 150 Chord main panels 12 mak ing airfoil thick enough good strength tal area 1656 sq Construction typical D tube t selected strength noah spans 36 has NACA 0010 section thick root first flights went very successfully Cumic XC real dream ship fly grooves very well turns very stablelike giant Paragon S3021 seems have good speed range required X-C flying works lift well Sailplane weve flown Continued page 153 PLUG-IN WING ADJUSTER KIT Four glass filled nylon brackets included key wing panels front rear allow accurately adjust panel straight flight complete hardware & instructions5995 NG TUBE & SOOCETS Aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 dia x 2S 895 1diax2S 995 1diax3S1495 148 Model Aviation RC Soaring/Blakeslee Continued page 148 12-ft wing plus wide chord make easy see extreme altitudes Landings full spoilers Up elevator fairly easyit just mushes slowly no Dutch roll think its impressive majestic ship both air ground Perhaps nonstandard-size planes like Cumic XC economical kit doesnt stop being excep tional Sailplanes Whats next 192-in Super Sagitta XC S3021 airfoil After SB-b com pleted Wasnt marvelous piece engineering Alexs part seems quite logical once hear story demise Sailaire theres no kit US market know 135/150-in-span rangewhich makes good sized combination X-C AMA Thermal Duration contest ship Sailaire speedy enough X-C Sailplanes size both ailerons have popu lar British Open Class Thermal contests some years havent caught yet Any Airtronics reading LSF News President Bob Steele sent news re lease announcing LSF has new address PO Box 517 Winfield IL 60190 Bob said new address will provide better service mem bers less work LSF staff Please make change voucher youre think ing Source Rohacell letter just re ceived modeler may have heard Matt Gewain Im very serious FAI modeler fly mostly FlA Free Flight Towline Gliders know FlA best Ive also flown other events including RC Soaring off past 28 years flying FLA Ive good fortune make US team few times recent years well attend some other im portant international contests impressions acquired international competitions US 5-10 years behind advanced countries mod eling technology reflected both design construction methods wanted use state-of-the-art modeling materials tech niques saw Europe However found ma terials available except large quantities So started new company Com posite Structures Technology make supe rior modeling materials available everyone US case youre familiar Rohacell what spec sheet says about Rohacell light rigid high-quality poly methacrylimide foam available 19- 31-lb densities Most impressive its strengthto-weight characteristic compared balsa sty rene polyurethane foams Rohacells high compression modulus makes ideal use core high-strength composite structures pure white color can shaped stan dard woodworking techniques should hot-wired because harmful vapors may formed Most modeling adhesives suitable cluding epoxy polyester slow-cure cyanoa crylate Since Rohacell nonporous adhesives requiring evaporation cure like white glues recommended Matt sells Rohacell sheet thicknesses 10 15 20 30 40mm larger incre ments up 50mm thick Thicknesses up 2mm 31-lb density thicker sheets 19-lb den sity comes various lengths widths /2 x 2 ft up 2 x 4 ft Its cheap piece 2mm x 12 x 48 costs $1675 com mon use Rohacell sandwich core ma terial between fiberglass skins molded wings 100-in plane would need four sheetsor $68 worth Rohacell hey youre talk ing world-class Sailplanes quality efficiencynot costare considerations Matt also sells Kevlar fiberglass cloth Safe-T-Poxy epoxy resin mold release spray self-sticking synthetic rubber strip seal ing vacuum bags Because expert mod eler himself can rely Matts advice about best materials applications Send SASE information complete ordering de tails Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 telephone number 213 5427393 Strength glue joints Youve heard re mark several times before about good newsletter South Bay club Northern Cal ifornia Editor John Dvorak has knack get ting very informative articles members Recall two members Seth Dawson Rich Spicer 89 US F3B team re cent issue Silent Flyer article Reinhard Lahde Bob Bayard contained such important information about gluing carbon fiber felt bad passed along Sailplan ers process continuing some work us BB started strength wing spars felt need find best way glue strips carbon-fiber/epoxy laminates other other materials such spruce finding glue strengths aliphatic glue gap-filling cyanoacrylate fast 5-minute medium-speed 30-minute slow epoxies Slow epoxy kind sets up about three hours best left overnight harden strength interested shear strength ability glue joint resist sliding failure along glued surface typical test sample shown sketch have tested adhesion carbon fiber spruce balsa carbon fiber itself PullCarbonPull FiberSpruce Epoxy does bond well epoxy sur face carbon fiber/epoxy laminate lam inate surface partially unsanded Cyano somewhat tolerant some shiny surface spots laminate Best course sand laminate surfaces until no shiny spots remain results reported based no shiny spots preparation reason know about shiny spot problem too thorough sanding earlier phases inquiry best joints made least glue clamping two pieces excess glue squeezed out made test pieces thicker glue joints glue pulled apart chunks rather shearing along whole sur face Strength very lowno about well-made joint good joint between CF balsa fails pulling slivers wood off piece Bonds beDESIGNiD DIVGLOPID 35 0815 MACSIN THE LEADER IN COM PETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266/778 13677/8 14677/8 1567 16678 PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCHPRICE 534 634 72833/,456 833/4568 845667 94566/z77/z 10 4566 106W8W 106EW 114677A7748 115W 116EW 67 4W 125W 1256 1356 \J 1456 1556 164N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N5/N SERIES 400C 8I66777/4 9777 W WIDE BLADE EW EXTRA WIDE N NARROW March 1989 153 Tr ES 100 NEW WANNA RACE NORTHEAST AREA BEGINNER RACES 0-500 * FORM-i * FAI %j Instructions Club Programs Information Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 508 528-4043 203 673-2000 Length 0087 Span 6 Wing Area 750 ag 775 8SOa Waght Offered Super Deluxe Pm-Built Kit $45000 Completely Finished Model Call info & pricingVISAS MASTERCARD WELCOME aatS1M5Iw5ifofoAIfrs 406298-0311 FAXS 4082g8-6538 PLAIN CRADLE-2 Purchase local hobby shop order direct Completely Fuelproof Wide Fuselage Unbreakable es Flat Perfect Field Shop Same Day Shipping net aaUaN eat, muea fUrfuad Marty Berr 84 Stonefield Trail South Windsor CT 06074 Alao sae ad full satisfaction full refund ..... *316 par yard Lataat Japan. P3gm DesIgn Dalgned & Flown TOP Japan. Pilot Sultable FM AMA CI.. eRiSpa0m Rase itklsYra 4 ThlarcswaIisp hUndr & Phsoi Phesal tween two materials weakest cause balsa inherently weak tension Joints between CF spruce much stronger CF/balsa fail combination pulling some splinters out wood shearing some glue itself Joints between CF CF fail mostly separating gluelaminate interface well-sanded surfac es strength CF/CF joints close CF/spruce maybe bit Some joints taxed tension machine reengineered order break samples average breaking shear stress sam ples both CF/spruce CF/CF given table As table shows aliphatic glues make weakest bond should used carbon fiber Next come epoxies order cure time slowest being best Cya noacrylate strongest quite bit twice strong slow epoxy four times stronger fast epoxy summary want good joint tween CF laminate spruce other laminate sand until shiny spots disappear clean ac etone apply slow Zap sparingly clamp squeeze excess glue out Thats best joint thanks Reinhard Bob doing important research main use CF strengthen spruce wing spars tensile strength CF laminate normally much greater glue joint its important best bonding job can Otherwise CF little help aiding spar resist bending because glue joint lets go wing goes snap confess no idea slow cyano much better slow epoxy although Id done few informal peel tests both Another item about cyanos cure speed strength de crease sit around bench Unopened cyano lasts indefinitely freezer dont use up bottle few months its wise chuck Upcoming Cross-Country races X-C Racing fans will want make note two Eastern events Fifth Annual Sugarloaf Classic will held May 20-21 Dickerson MD about 40 miles northwest Washington DC Capital Area 154 Model Aviation Average Strength Gluepsi Aliphatic1220 Epoxy-fast 5-mm 1530 Epoxy-medium 30-mm 2190 Epoxy-slow 3-hr 3410 Cyanoacrylate6560 Send $1796 plus *200 shipping handling 1/4 1/3 Scale Sizes 6 plus *200 S & I-I THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great perfor mance Thermal Charger fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Soaring Association sponsor popular race fact its popular channels RC38 RC56 plus few new lower channels already taken Pat Flinn Detroit won last year Don Gougnnor/Terry Luckenback sec ond Sarget/Dickes/Sowder third less quarter mile info contact CD Guy Dickes 6331 Paddington Lane Centreville VA 22020 phone number 703 830-3631 Central Ontario Glider Group will try ob tain FAI sanction years Dash Cash make official F3H International contest Dash scheduled July 1-3 will held near Cookstown Ontario has popular event also deal year cant send entry form before April 15 will make fairer everyone have shot frequency However can get entry form right now contacting Neil Tinker 35 Cairnside Crescent Willowdale tario M2J 3M9 Canada Soaring high finance Over past few months Ive described Sailplaners wonderful features new Airtronics Vision 8SP radiothe ATRCS pro nounced A-Tracks computer encoder described January 1989 column Im excited about radio because ATRCS will eas ily tricks required multitask Soar ing question price comes up $850 list four servos sometimes look disappointment sets try explain its much considering what get also consid ering actual over-the-counter price retailers will almost assuredly substan tially less course what spend hobby personal thing whats bad per son too much another start talk ing over $500 theres no doubt impor tant investment territory worth proba bly consider Soaring main interestas serious sport just fly Gentle Ladies Oly us really need good four-channel set like Airtronics Vanguard Futaba Conquest can bought $150 less fact can fly lot very competitive Thermal Duration ships like Nats-winning Larry Jolly Model Products Meteor just three channels Bob Dodgsons Windsong ailerons flaps performs great four channels lot mechanical mixing have itch move up mid dle ground Randy Reynolds talked about last monthto fly ship ailerons flaps all-electronic coupling mixingthen Vi sion 8SP radio probably answer Its much less costly anything comparable US marketwith exception course Air tronics Module 7SP transmitter converted ATRCS $300 Control Systems Laborator ses give tale little perspective let re late some history first digital proportional ra dio set came Out about 1963 Bonnet Digi mite sold over $900 1965 bought first digital set Kraft six-channel cost bit over $600 same year also bought small Oldsmobile cost $3000 similar new car today would about $ 12000or four times much logic top-of-the-line ra dio should now sell over $2000 believe radio sets have improved lot over past 23 years cars have reason sophisticated radios relatively inexpensive today because competition space age computer-on-a-chip technology Have become spoiled being able buy very good reliable set about same price quality kit Id say answer yes fliers now buy whole radio set planes because price less receiver servos switch harness battery bought separately look way transmitter free Editors note might want read George M Myers Radio Tech nique column month since talks about very problem RMcM So moral story seriously en joy wonderful hobby/sport have ambi tion step up full-house plane cost first-class radio really much com pared lots other hobbies could get mixed up Besides live once Cash VISA Certified Cheek R/C EXTRAS 712-9434102 RR1 Box 28B Sergeant Bluff IA 51054 LMarch 1989 155 OPS orYS parts close phor 1-800-535-2568 Dealer Inquiries Invited SThe P Comfwacro% 7m&z4 r CARBON FIBER LAMINATES Aerospace Composite Products offers variety rigid carbon fiber/epoxy sheets add stiffness almost material- fiberglass foam bal sawood laminates can used reinforce foam wings leading trailing edges wing spars Carbon Fiber bonds easily slow setting cyanoacrylates 5-minute epoxies laminate can stripped narrower widths TYPICAL INSTALLATION CL-i 007 thick 1x48-$500 1x72-$70CNA FOAM WING CL-2 014 thick 1x48-$800 1x72-$11C0 Send SASE information additional sizes products Add $300 shipping handling Calif residents add 6% tax Overseas orders add 15%-Order COD send check money order IIThe source lightweight materials Stand Off Extra 230 Kits Scale Now Available Three Sizes 1/3 Scale Kit plus $15 shipping 30% Scale Kit plus $15 shipping 1/4 Scale Kit plus $10 shipping Also Available Weeks Special plus $15 ship PO Box 16621 Dept M Irvine CA 92714 714 250-1107
Edition: Model Aviation - 1989/03
Page Numbers: 48, 49, 148, 153, 154, 155
NATS NEWS Tom Culmsee Event Director Soaring years AMA Nats called let everyone know what schedule would Its quite bit different past years please read carefully Soaring Nats will run Monday July 18 through Saturday July 23 Flying will nice big field near Richland WA south east corner state rundown daily events Monday Cross-Country race AMA Sanc tioned flown provisional F3H rules Fliers X-C can go up fabulous Eagle Butte some Slope fun-flying Tuesday Hand-Launch event Transmitter check 100-500 pm Wednesday Scale F3B events Transmitter check 100-500 pm Thursday Unlimited Class event Friday Standard Class event Saturday Two-Meter Class event NSS Banquet will evening Clover land Inn awards will presented events Looks like great week flying sched ule adds two days Tuesday-through-Friday program used recent years New course Hand-Launch event chance partici pate Cross-Country race during Nats week Both types flying gaining popularity Nats exposure should really give big boost Also running Sailplane class per day will new should able get nearly same number flights before because three classes plus Scale have flown over four days past years sites facilities said first class expanded Soaring schedule op portunity families combine Nats vacation scenic Northwest have hunch will turn Out very popular Nats Sailplaners Better get entry early Ques tions can addressed SASE Tom Culm see 2190 SW 8th Dr Gresham OR 97080 telephone 503 667-4532 Wil Byers 632 Meadows Drive East Richland WA 99352 tele phone 509 627-5224 North Alabama Silent Fliers Ron Swinehart sent group photo taken 88 LSF South eastern Regional Contest wanted let know about host club new NASF Soaring club Huntsville AL Ron club pres ident said have great 58-acre sod farm hybrid Bermuda grass use flying field NASF has grown 33 members years time personal note Ron said has using ATRCS-modified Airtronics Module radio since August LJMP Meteor flat wings fully sheeted ailerons Flies great 95-oz 129 ozIsq ft wing load ing fliers north Alabama wishing con tact Ron address 8733 Edgehill Dr Hunts ville AL 35802 Database Soaring clubs really appreciate re ceiving word about new clubs because beginners often write asking live Possum Bottom get started Gliders know best way start Soaring get hooked up experienced fliers knew Soaring group near beginner Id able put him touch AMA has listing Chartered Clubs clubs arent chart ered some groups dont go formality organizing club point have sort Soaring group willing help beginners Id appreciate hearing New Larry Jolly Gliders photos Larrys partner Dennis Brandt taken F3B Team Selection Finals September Win some shown prototype model about 90% finished time Its good look ing 128-in-span plane fully sheeted builtup balsa wing ailerons flaps spoilers glass fuse lage slip-on nose cone T-tail fixed stab/separate elevator should flying now will get report Larry Dennis 1 12-in-span Cheetah available now UMP $150 list price plane 48 Model Aviation Radio Conoi Soaring Byron Blakeslee WInnebago Dr Sedalla CO 80135 Can count 27 pilots photo entrants 1988 1SF Southeastern Regional Contest hosted North Alabama Silent Fliers Club Winners 1SF plaques NASFs contest L-R Bob Sowder 1SF V Paul Behr Loren Banco Dick Renskers Tom Killough Wayne Blankenship Kendall McDonald Alex Dydulas Raleigh NC two Sailpianes based Airtronics Sagitta family calls smaller 130-in span Cumic Plus Plus larger 150-in span Cumic XC Photo above gives other look Cumic XC sports blue/white finish Alex tells designed months column beautiful proportions really looks right has same fuselage LJMP Pantera designed Don Chancy back late Sev enties Pantera 100-in-span polyhedral ship Eppler 205 airfoil still good plane can buy class Modified Pantera kits straight wings make excellent Standardclass aileron planes What Dennis Larry have done Cheetah improve good thing has same airfoil wings straight tapered fully sheeted side extended 6 rudder all-flying stab same Pan tera Dennis has flying prototypes two seasons says nicest handling Glider hes flown fully sheeted wings make effi cient also light Cheetah can climb out gopher belches according Den nis cant beat LJMP can contacted 5501 W Como Santa Ana CA 92703 phone 714 826-6861 missing Sagitta Alex Dydula Raleigh NC sent such interesting letter cant better print its entirety Take away Alex thought Id take time share some recent building experiences belong RISE Raleigh Independent Soaring Enthu siasts Club write articles club newslet ter kit reviews construction mods hints-and-tips kind stuff Ive active building flying Sailplanes over three years just having completed LSF Level Ill really got bug now have wide col lection kits fuselages two-car Sail plane factory garage know Tony Arnoux Miami fairly well converse him Continued page 148 Carry Largest Only Stock Kraft Parts World .. Kraft alive working KRAFT MIDWEST Au66orIzsd Warranty Service ILL FLY WHAT Fl FREOUENCY CONVERSION $1000 Disnoont Regal Rapait Moot Makes Models Converted Towng Dons Spectwm Anelyter Also Service ForACE U/C jjj] Only Full Time Servicenter Ihe Midwesl ~17 East Main St Northville Michin 48167 Upper Level-u1occor Phone IJIJJ-tUAJOJ Visa Meeterrd hlcorneMarch 1989 49 Dennis Brandt newest Larry Jolly Model Products kit Cheetah Its available right now Wingspan 112 Wings fully sheeted have ailerons spoilers Holds twelve gb-plugs U Made tough fuel resistant Protects elements dirt hard knocks Keeps gb-plugs neat organized easy find easy use See favorite Hobby Shop Du-Bro Products Inc Bonner Road Wauconda IL 60084 r Dennis Brandt again tnis time proto type new LJMP Winsome Foreshort ening wing due wing tip being close camera Details column Ji~ K-LINE -4 $975AVAILABLE AT AMERICAS$525 FINEST HOBBY SHOPS DISTRIBUTED BY SAUflflHI ZNDVDERZZD7950 Sot Gobriel Rood cadoro CA 53422 905 466-1717 S Fiberglass Cowls BALSA USA Citabria Aerohalic Pro 2100 EAABPlane1950 J-3 Cab /4 scale wlengine SUB ISSUEA STRIES Aeronca Champion 40 1300 Citabria 40 size 1300 Aeronca Champ 1/4 scale . 2100 Citabria 1/4 scale 2100 Mr Malligan w/hlisters 3100 CARL GOLISEK KITS Seper Chipmank 2100 Electric Glider5 50 J-3 Cab1200 mini macu J3/J4 i/ scale.12 00 J3/J4 i/ scale1700 GREAT PLANES CAP 21 40 size 1300 CAP 21 60 size 1900 Electric Cah 750 Saper Aeromaster 1500 LAJICE BAR AIRCRAFT MPG F4U open flaps 2100 P-5123 00 RV329 00 MAUL AIRPLANE NEWS Aero Fox 11 00 Saper Hots 1100 Big Hots 1700 Knight Twister 3100 Liberty Sport B 2600 PICA Aeronca Sedan 1/ scale .. 1600 Cessna 192 scale 2100 Joegmeister w/blisters 1000 T2B 1/5 Scale 2500 Waco /s w/blisters 2200 SIB J-3 Cah w/engine 2100 Cuh Special PA 11 2100 KadetSr 1100 Keagar 950 Skybolt 1300 SCAlE PLANS MIS P1101K Gloster Gladiator scale .. 2600 PT19 e 2100 Super Marine SOB scale 2500 Floats 70 long pair12500 Wace YMF-5 /a scale2700 WE TECHNICAL SERVICES PLANS Beoter Wittman Racer 2900 Cessna AW 1700 Cartiss Falcon 31 00 Spad XIII Cl 2000 WORLD ENGINE CAP 21 40 size 1400 Draqon Lady 1900 Rabin Hood 09 2100 OTHER KITS ASTRO FLIGHTPnrtertield 900 DAVE PLATTJangmeister . 2100 MIDWESTSuper Hots 1150 RC KITS Star Daster 2100 Strive get good setup ma neuver wings should level constant al titude contestant announces Beginning now Maneuver complete Smooth corrections during flight coun ter adverse winds gusts sudden crosswinds should cause loss points Consider ation scale speed overall flying qualities model should given judges minds lack precision will result de duction points manner present flight should pleasure judge Dont make difficult vague Stand close judges can hear call program Fly program easy judges see Start finish ma neuvers stated rule book Read de scription to flown Avoid er rors specified possible During practice sessions fly program critique yourself Above honest self possible have friend help ask him flight went Work having crossover points right front Have maneuvers comfortable eye level altitude distance out judges folks want impress years ago told elderly gentle man get out something what THE BEST FUSELAGE JIG EVER PERIOD Provides Solid Support Accurate Building Rugged construction 7 Ply Aircraft Plywood Provides Lifetime use Two Sizes Available Regular Fuselages Up 6 Wide Jumbo lages Up 9 Wide Use Own Building Board Work Bench Base Mount Jig Station Uni-Strut Guide Rails Most Versatile SettJp contains complete Hardware Instructions Including Uni-Strut Information Box 4 Standard Jig Stations 91795 Box 4 Jumbo Jig Stations 1995 TwoS ft long Guide Rails including mounting nuts 2195 FIBERGLASS Dept MA Rt 1 Box 530 Goodview VA 24095 womunm Utmh lbs cut US add 5300 up ibugs Va nua add 4/a% ulus tax US USIBSES VISA MuteeCud COIL dm5 accepted add S2U ulpplg Cbu3S SiBIdS Kilt US wells *pIag rs uduelq lachde $100 US mini patams mId huldihlg PUnK inininsa wuinAnou 703-890-6017 9am 9 pm EDT Send Si 00 8-page brochure featuring hundreds cowls wheelpants radial cowls Brochure free order put winners work hard As step off soapbox Ill now announce Article com plete RC Soaring/Blakeslee Continued page 49 once week purchased two Roke kits Tony SB-l0 ASW-17 SB10 nearly complete real reason letter tell about fooling around Sagitta family Sailplanes discovery Missing Sagitta given broken 600 quickly repaired flew its pants off graduated 900 Cumic friend gave 600 also Sagitta XC al ways amazed no way get kit since has withdrawn Airtronics started looking Sagitta family Sailplanes comparing wingspans planforms polyhe dral angles tail moments etctrying under stand what made ships fly great Yes Eppler 205 common denominator 30/100 poly angles same missing link found compare wingspans ter need establish baseline before going further primary interests Sailplanes IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure aileron elevator rudder throw Takes guess work out trimming out airplane quality toot complete instructions logbook carrying case5795 -I PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass Sited nylon adjusters included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket 9695 Include 92 SOIltem UPS esidents Add 6% Sales Tan GATOR R/C PRODUCTS 3713 Pompano Dr acola FL 32514 1 476-8639 flying high long Cross-Country So tends make want large ships good pen etration qualities should explain did what did first Cumic Plusstretched span 130 118 increased stab area 15% Right out blocks ship thermalled exceptionally well penetrated beautifully Three dubbed Cumic Plus Plus have built flown very success fully However super thermaling ship it still ultimate X-C machine mainly because visibility problems high altitudes Now Missing Sagitta mic Plus 118-in wingspan Plus Plus 130 Sagitta XC 174 inwell measurements plus photograph 600 900 XC taken contest two years ago led believe something missing 140/150-in range After some initial layouts thought looked like Missing Sagitta would fit requirements fine X-C ma chine also outstanding all-out Thermal ship Sagitta XC big heavy tend requires assistance launching Cumic Plus Plus little too small wanted plane didnt need FAA checklist flythe famous KISS keep sinople stupid RMcM principle No high tech except airfoil Just rudder elevator spoilers photo shows both experimental Sailplanes Plus Plus smaller Missing Sagitta Ive named Cumic XC larger used Bob Sealy Jupiter fuselage stretched 6 same length Sagitta XC 57 wing three-piece bolt-on design fuselage cut out pro vide saddle area wing center section rest Michael Seligs 3021 improved E205 about 1 % thinner used air foil After new Sagitta family member de serves little sprucing up center panels 39 side con structed % x 3R-in main spars 0007 car bon fiber outer sides % x A-in drag spar also used Spoilers five bays wide Tip panels 36 making total span 150 Chord main panels 12 mak ing airfoil thick enough good strength tal area 1656 sq Construction typical D tube t selected strength noah spans 36 has NACA 0010 section thick root first flights went very successfully Cumic XC real dream ship fly grooves very well turns very stablelike giant Paragon S3021 seems have good speed range required X-C flying works lift well Sailplane weve flown Continued page 153 PLUG-IN WING ADJUSTER KIT Four glass filled nylon brackets included key wing panels front rear allow accurately adjust panel straight flight complete hardware & instructions5995 NG TUBE & SOOCETS Aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 dia x 2S 895 1diax2S 995 1diax3S1495 148 Model Aviation RC Soaring/Blakeslee Continued page 148 12-ft wing plus wide chord make easy see extreme altitudes Landings full spoilers Up elevator fairly easyit just mushes slowly no Dutch roll think its impressive majestic ship both air ground Perhaps nonstandard-size planes like Cumic XC economical kit doesnt stop being excep tional Sailplanes Whats next 192-in Super Sagitta XC S3021 airfoil After SB-b com pleted Wasnt marvelous piece engineering Alexs part seems quite logical once hear story demise Sailaire theres no kit US market know 135/150-in-span rangewhich makes good sized combination X-C AMA Thermal Duration contest ship Sailaire speedy enough X-C Sailplanes size both ailerons have popu lar British Open Class Thermal contests some years havent caught yet Any Airtronics reading LSF News President Bob Steele sent news re lease announcing LSF has new address PO Box 517 Winfield IL 60190 Bob said new address will provide better service mem bers less work LSF staff Please make change voucher youre think ing Source Rohacell letter just re ceived modeler may have heard Matt Gewain Im very serious FAI modeler fly mostly FlA Free Flight Towline Gliders know FlA best Ive also flown other events including RC Soaring off past 28 years flying FLA Ive good fortune make US team few times recent years well attend some other im portant international contests impressions acquired international competitions US 5-10 years behind advanced countries mod eling technology reflected both design construction methods wanted use state-of-the-art modeling materials tech niques saw Europe However found ma terials available except large quantities So started new company Com posite Structures Technology make supe rior modeling materials available everyone US case youre familiar Rohacell what spec sheet says about Rohacell light rigid high-quality poly methacrylimide foam available 19- 31-lb densities Most impressive its strengthto-weight characteristic compared balsa sty rene polyurethane foams Rohacells high compression modulus makes ideal use core high-strength composite structures pure white color can shaped stan dard woodworking techniques should hot-wired because harmful vapors may formed Most modeling adhesives suitable cluding epoxy polyester slow-cure cyanoa crylate Since Rohacell nonporous adhesives requiring evaporation cure like white glues recommended Matt sells Rohacell sheet thicknesses 10 15 20 30 40mm larger incre ments up 50mm thick Thicknesses up 2mm 31-lb density thicker sheets 19-lb den sity comes various lengths widths /2 x 2 ft up 2 x 4 ft Its cheap piece 2mm x 12 x 48 costs $1675 com mon use Rohacell sandwich core ma terial between fiberglass skins molded wings 100-in plane would need four sheetsor $68 worth Rohacell hey youre talk ing world-class Sailplanes quality efficiencynot costare considerations Matt also sells Kevlar fiberglass cloth Safe-T-Poxy epoxy resin mold release spray self-sticking synthetic rubber strip seal ing vacuum bags Because expert mod eler himself can rely Matts advice about best materials applications Send SASE information complete ordering de tails Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 telephone number 213 5427393 Strength glue joints Youve heard re mark several times before about good newsletter South Bay club Northern Cal ifornia Editor John Dvorak has knack get ting very informative articles members Recall two members Seth Dawson Rich Spicer 89 US F3B team re cent issue Silent Flyer article Reinhard Lahde Bob Bayard contained such important information about gluing carbon fiber felt bad passed along Sailplan ers process continuing some work us BB started strength wing spars felt need find best way glue strips carbon-fiber/epoxy laminates other other materials such spruce finding glue strengths aliphatic glue gap-filling cyanoacrylate fast 5-minute medium-speed 30-minute slow epoxies Slow epoxy kind sets up about three hours best left overnight harden strength interested shear strength ability glue joint resist sliding failure along glued surface typical test sample shown sketch have tested adhesion carbon fiber spruce balsa carbon fiber itself PullCarbonPull FiberSpruce Epoxy does bond well epoxy sur face carbon fiber/epoxy laminate lam inate surface partially unsanded Cyano somewhat tolerant some shiny surface spots laminate Best course sand laminate surfaces until no shiny spots remain results reported based no shiny spots preparation reason know about shiny spot problem too thorough sanding earlier phases inquiry best joints made least glue clamping two pieces excess glue squeezed out made test pieces thicker glue joints glue pulled apart chunks rather shearing along whole sur face Strength very lowno about well-made joint good joint between CF balsa fails pulling slivers wood off piece Bonds beDESIGNiD DIVGLOPID 35 0815 MACSIN THE LEADER IN COM PETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266/778 13677/8 14677/8 1567 16678 PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCHPRICE 534 634 72833/,456 833/4568 845667 94566/z77/z 10 4566 106W8W 106EW 114677A7748 115W 116EW 67 4W 125W 1256 1356 \J 1456 1556 164N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N5/N SERIES 400C 8I66777/4 9777 W WIDE BLADE EW EXTRA WIDE N NARROW March 1989 153 Tr ES 100 NEW WANNA RACE NORTHEAST AREA BEGINNER RACES 0-500 * FORM-i * FAI %j Instructions Club Programs Information Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 508 528-4043 203 673-2000 Length 0087 Span 6 Wing Area 750 ag 775 8SOa Waght Offered Super Deluxe Pm-Built Kit $45000 Completely Finished Model Call info & pricingVISAS MASTERCARD WELCOME aatS1M5Iw5ifofoAIfrs 406298-0311 FAXS 4082g8-6538 PLAIN CRADLE-2 Purchase local hobby shop order direct Completely Fuelproof Wide Fuselage Unbreakable es Flat Perfect Field Shop Same Day Shipping net aaUaN eat, muea fUrfuad Marty Berr 84 Stonefield Trail South Windsor CT 06074 Alao sae ad full satisfaction full refund ..... *316 par yard Lataat Japan. P3gm DesIgn Dalgned & Flown TOP Japan. Pilot Sultable FM AMA CI.. eRiSpa0m Rase itklsYra 4 ThlarcswaIisp hUndr & Phsoi Phesal tween two materials weakest cause balsa inherently weak tension Joints between CF spruce much stronger CF/balsa fail combination pulling some splinters out wood shearing some glue itself Joints between CF CF fail mostly separating gluelaminate interface well-sanded surfac es strength CF/CF joints close CF/spruce maybe bit Some joints taxed tension machine reengineered order break samples average breaking shear stress sam ples both CF/spruce CF/CF given table As table shows aliphatic glues make weakest bond should used carbon fiber Next come epoxies order cure time slowest being best Cya noacrylate strongest quite bit twice strong slow epoxy four times stronger fast epoxy summary want good joint tween CF laminate spruce other laminate sand until shiny spots disappear clean ac etone apply slow Zap sparingly clamp squeeze excess glue out Thats best joint thanks Reinhard Bob doing important research main use CF strengthen spruce wing spars tensile strength CF laminate normally much greater glue joint its important best bonding job can Otherwise CF little help aiding spar resist bending because glue joint lets go wing goes snap confess no idea slow cyano much better slow epoxy although Id done few informal peel tests both Another item about cyanos cure speed strength de crease sit around bench Unopened cyano lasts indefinitely freezer dont use up bottle few months its wise chuck Upcoming Cross-Country races X-C Racing fans will want make note two Eastern events Fifth Annual Sugarloaf Classic will held May 20-21 Dickerson MD about 40 miles northwest Washington DC Capital Area 154 Model Aviation Average Strength Gluepsi Aliphatic1220 Epoxy-fast 5-mm 1530 Epoxy-medium 30-mm 2190 Epoxy-slow 3-hr 3410 Cyanoacrylate6560 Send $1796 plus *200 shipping handling 1/4 1/3 Scale Sizes 6 plus *200 S & I-I THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great perfor mance Thermal Charger fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Soaring Association sponsor popular race fact its popular channels RC38 RC56 plus few new lower channels already taken Pat Flinn Detroit won last year Don Gougnnor/Terry Luckenback sec ond Sarget/Dickes/Sowder third less quarter mile info contact CD Guy Dickes 6331 Paddington Lane Centreville VA 22020 phone number 703 830-3631 Central Ontario Glider Group will try ob tain FAI sanction years Dash Cash make official F3H International contest Dash scheduled July 1-3 will held near Cookstown Ontario has popular event also deal year cant send entry form before April 15 will make fairer everyone have shot frequency However can get entry form right now contacting Neil Tinker 35 Cairnside Crescent Willowdale tario M2J 3M9 Canada Soaring high finance Over past few months Ive described Sailplaners wonderful features new Airtronics Vision 8SP radiothe ATRCS pro nounced A-Tracks computer encoder described January 1989 column Im excited about radio because ATRCS will eas ily tricks required multitask Soar ing question price comes up $850 list four servos sometimes look disappointment sets try explain its much considering what get also consid ering actual over-the-counter price retailers will almost assuredly substan tially less course what spend hobby personal thing whats bad per son too much another start talk ing over $500 theres no doubt impor tant investment territory worth proba bly consider Soaring main interestas serious sport just fly Gentle Ladies Oly us really need good four-channel set like Airtronics Vanguard Futaba Conquest can bought $150 less fact can fly lot very competitive Thermal Duration ships like Nats-winning Larry Jolly Model Products Meteor just three channels Bob Dodgsons Windsong ailerons flaps performs great four channels lot mechanical mixing have itch move up mid dle ground Randy Reynolds talked about last monthto fly ship ailerons flaps all-electronic coupling mixingthen Vi sion 8SP radio probably answer Its much less costly anything comparable US marketwith exception course Air tronics Module 7SP transmitter converted ATRCS $300 Control Systems Laborator ses give tale little perspective let re late some history first digital proportional ra dio set came Out about 1963 Bonnet Digi mite sold over $900 1965 bought first digital set Kraft six-channel cost bit over $600 same year also bought small Oldsmobile cost $3000 similar new car today would about $ 12000or four times much logic top-of-the-line ra dio should now sell over $2000 believe radio sets have improved lot over past 23 years cars have reason sophisticated radios relatively inexpensive today because competition space age computer-on-a-chip technology Have become spoiled being able buy very good reliable set about same price quality kit Id say answer yes fliers now buy whole radio set planes because price less receiver servos switch harness battery bought separately look way transmitter free Editors note might want read George M Myers Radio Tech nique column month since talks about very problem RMcM So moral story seriously en joy wonderful hobby/sport have ambi tion step up full-house plane cost first-class radio really much com pared lots other hobbies could get mixed up Besides live once Cash VISA Certified Cheek R/C EXTRAS 712-9434102 RR1 Box 28B Sergeant Bluff IA 51054 LMarch 1989 155 OPS orYS parts close phor 1-800-535-2568 Dealer Inquiries Invited SThe P Comfwacro% 7m&z4 r CARBON FIBER LAMINATES Aerospace Composite Products offers variety rigid carbon fiber/epoxy sheets add stiffness almost material- fiberglass foam bal sawood laminates can used reinforce foam wings leading trailing edges wing spars Carbon Fiber bonds easily slow setting cyanoacrylates 5-minute epoxies laminate can stripped narrower widths TYPICAL INSTALLATION CL-i 007 thick 1x48-$500 1x72-$70CNA FOAM WING CL-2 014 thick 1x48-$800 1x72-$11C0 Send SASE information additional sizes products Add $300 shipping handling Calif residents add 6% tax Overseas orders add 15%-Order COD send check money order IIThe source lightweight materials Stand Off Extra 230 Kits Scale Now Available Three Sizes 1/3 Scale Kit plus $15 shipping 30% Scale Kit plus $15 shipping 1/4 Scale Kit plus $10 shipping Also Available Weeks Special plus $15 ship PO Box 16621 Dept M Irvine CA 92714 714 250-1107
Edition: Model Aviation - 1989/03
Page Numbers: 48, 49, 148, 153, 154, 155
NATS NEWS Tom Culmsee Event Director Soaring years AMA Nats called let everyone know what schedule would Its quite bit different past years please read carefully Soaring Nats will run Monday July 18 through Saturday July 23 Flying will nice big field near Richland WA south east corner state rundown daily events Monday Cross-Country race AMA Sanc tioned flown provisional F3H rules Fliers X-C can go up fabulous Eagle Butte some Slope fun-flying Tuesday Hand-Launch event Transmitter check 100-500 pm Wednesday Scale F3B events Transmitter check 100-500 pm Thursday Unlimited Class event Friday Standard Class event Saturday Two-Meter Class event NSS Banquet will evening Clover land Inn awards will presented events Looks like great week flying sched ule adds two days Tuesday-through-Friday program used recent years New course Hand-Launch event chance partici pate Cross-Country race during Nats week Both types flying gaining popularity Nats exposure should really give big boost Also running Sailplane class per day will new should able get nearly same number flights before because three classes plus Scale have flown over four days past years sites facilities said first class expanded Soaring schedule op portunity families combine Nats vacation scenic Northwest have hunch will turn Out very popular Nats Sailplaners Better get entry early Ques tions can addressed SASE Tom Culm see 2190 SW 8th Dr Gresham OR 97080 telephone 503 667-4532 Wil Byers 632 Meadows Drive East Richland WA 99352 tele phone 509 627-5224 North Alabama Silent Fliers Ron Swinehart sent group photo taken 88 LSF South eastern Regional Contest wanted let know about host club new NASF Soaring club Huntsville AL Ron club pres ident said have great 58-acre sod farm hybrid Bermuda grass use flying field NASF has grown 33 members years time personal note Ron said has using ATRCS-modified Airtronics Module radio since August LJMP Meteor flat wings fully sheeted ailerons Flies great 95-oz 129 ozIsq ft wing load ing fliers north Alabama wishing con tact Ron address 8733 Edgehill Dr Hunts ville AL 35802 Database Soaring clubs really appreciate re ceiving word about new clubs because beginners often write asking live Possum Bottom get started Gliders know best way start Soaring get hooked up experienced fliers knew Soaring group near beginner Id able put him touch AMA has listing Chartered Clubs clubs arent chart ered some groups dont go formality organizing club point have sort Soaring group willing help beginners Id appreciate hearing New Larry Jolly Gliders photos Larrys partner Dennis Brandt taken F3B Team Selection Finals September Win some shown prototype model about 90% finished time Its good look ing 128-in-span plane fully sheeted builtup balsa wing ailerons flaps spoilers glass fuse lage slip-on nose cone T-tail fixed stab/separate elevator should flying now will get report Larry Dennis 1 12-in-span Cheetah available now UMP $150 list price plane 48 Model Aviation Radio Conoi Soaring Byron Blakeslee WInnebago Dr Sedalla CO 80135 Can count 27 pilots photo entrants 1988 1SF Southeastern Regional Contest hosted North Alabama Silent Fliers Club Winners 1SF plaques NASFs contest L-R Bob Sowder 1SF V Paul Behr Loren Banco Dick Renskers Tom Killough Wayne Blankenship Kendall McDonald Alex Dydulas Raleigh NC two Sailpianes based Airtronics Sagitta family calls smaller 130-in span Cumic Plus Plus larger 150-in span Cumic XC Photo above gives other look Cumic XC sports blue/white finish Alex tells designed months column beautiful proportions really looks right has same fuselage LJMP Pantera designed Don Chancy back late Sev enties Pantera 100-in-span polyhedral ship Eppler 205 airfoil still good plane can buy class Modified Pantera kits straight wings make excellent Standardclass aileron planes What Dennis Larry have done Cheetah improve good thing has same airfoil wings straight tapered fully sheeted side extended 6 rudder all-flying stab same Pan tera Dennis has flying prototypes two seasons says nicest handling Glider hes flown fully sheeted wings make effi cient also light Cheetah can climb out gopher belches according Den nis cant beat LJMP can contacted 5501 W Como Santa Ana CA 92703 phone 714 826-6861 missing Sagitta Alex Dydula Raleigh NC sent such interesting letter cant better print its entirety Take away Alex thought Id take time share some recent building experiences belong RISE Raleigh Independent Soaring Enthu siasts Club write articles club newslet ter kit reviews construction mods hints-and-tips kind stuff Ive active building flying Sailplanes over three years just having completed LSF Level Ill really got bug now have wide col lection kits fuselages two-car Sail plane factory garage know Tony Arnoux Miami fairly well converse him Continued page 148 Carry Largest Only Stock Kraft Parts World .. Kraft alive working KRAFT MIDWEST Au66orIzsd Warranty Service ILL FLY WHAT Fl FREOUENCY CONVERSION $1000 Disnoont Regal Rapait Moot Makes Models Converted Towng Dons Spectwm Anelyter Also Service ForACE U/C jjj] Only Full Time Servicenter Ihe Midwesl ~17 East Main St Northville Michin 48167 Upper Level-u1occor Phone IJIJJ-tUAJOJ Visa Meeterrd hlcorneMarch 1989 49 Dennis Brandt newest Larry Jolly Model Products kit Cheetah Its available right now Wingspan 112 Wings fully sheeted have ailerons spoilers Holds twelve gb-plugs U Made tough fuel resistant Protects elements dirt hard knocks Keeps gb-plugs neat organized easy find easy use See favorite Hobby Shop Du-Bro Products Inc Bonner Road Wauconda IL 60084 r Dennis Brandt again tnis time proto type new LJMP Winsome Foreshort ening wing due wing tip being close camera Details column Ji~ K-LINE -4 $975AVAILABLE AT AMERICAS$525 FINEST HOBBY SHOPS DISTRIBUTED BY SAUflflHI ZNDVDERZZD7950 Sot Gobriel Rood cadoro CA 53422 905 466-1717 S Fiberglass Cowls BALSA USA Citabria Aerohalic Pro 2100 EAABPlane1950 J-3 Cab /4 scale wlengine SUB ISSUEA STRIES Aeronca Champion 40 1300 Citabria 40 size 1300 Aeronca Champ 1/4 scale . 2100 Citabria 1/4 scale 2100 Mr Malligan w/hlisters 3100 CARL GOLISEK KITS Seper Chipmank 2100 Electric Glider5 50 J-3 Cab1200 mini macu J3/J4 i/ scale.12 00 J3/J4 i/ scale1700 GREAT PLANES CAP 21 40 size 1300 CAP 21 60 size 1900 Electric Cah 750 Saper Aeromaster 1500 LAJICE BAR AIRCRAFT MPG F4U open flaps 2100 P-5123 00 RV329 00 MAUL AIRPLANE NEWS Aero Fox 11 00 Saper Hots 1100 Big Hots 1700 Knight Twister 3100 Liberty Sport B 2600 PICA Aeronca Sedan 1/ scale .. 1600 Cessna 192 scale 2100 Joegmeister w/blisters 1000 T2B 1/5 Scale 2500 Waco /s w/blisters 2200 SIB J-3 Cah w/engine 2100 Cuh Special PA 11 2100 KadetSr 1100 Keagar 950 Skybolt 1300 SCAlE PLANS MIS P1101K Gloster Gladiator scale .. 2600 PT19 e 2100 Super Marine SOB scale 2500 Floats 70 long pair12500 Wace YMF-5 /a scale2700 WE TECHNICAL SERVICES PLANS Beoter Wittman Racer 2900 Cessna AW 1700 Cartiss Falcon 31 00 Spad XIII Cl 2000 WORLD ENGINE CAP 21 40 size 1400 Draqon Lady 1900 Rabin Hood 09 2100 OTHER KITS ASTRO FLIGHTPnrtertield 900 DAVE PLATTJangmeister . 2100 MIDWESTSuper Hots 1150 RC KITS Star Daster 2100 Strive get good setup ma neuver wings should level constant al titude contestant announces Beginning now Maneuver complete Smooth corrections during flight coun ter adverse winds gusts sudden crosswinds should cause loss points Consider ation scale speed overall flying qualities model should given judges minds lack precision will result de duction points manner present flight should pleasure judge Dont make difficult vague Stand close judges can hear call program Fly program easy judges see Start finish ma neuvers stated rule book Read de scription to flown Avoid er rors specified possible During practice sessions fly program critique yourself Above honest self possible have friend help ask him flight went Work having crossover points right front Have maneuvers comfortable eye level altitude distance out judges folks want impress years ago told elderly gentle man get out something what THE BEST FUSELAGE JIG EVER PERIOD Provides Solid Support Accurate Building Rugged construction 7 Ply Aircraft Plywood Provides Lifetime use Two Sizes Available Regular Fuselages Up 6 Wide Jumbo lages Up 9 Wide Use Own Building Board Work Bench Base Mount Jig Station Uni-Strut Guide Rails Most Versatile SettJp contains complete Hardware Instructions Including Uni-Strut Information Box 4 Standard Jig Stations 91795 Box 4 Jumbo Jig Stations 1995 TwoS ft long Guide Rails including mounting nuts 2195 FIBERGLASS Dept MA Rt 1 Box 530 Goodview VA 24095 womunm Utmh lbs cut US add 5300 up ibugs Va nua add 4/a% ulus tax US USIBSES VISA MuteeCud COIL dm5 accepted add S2U ulpplg Cbu3S SiBIdS Kilt US wells *pIag rs uduelq lachde $100 US mini patams mId huldihlg PUnK inininsa wuinAnou 703-890-6017 9am 9 pm EDT Send Si 00 8-page brochure featuring hundreds cowls wheelpants radial cowls Brochure free order put winners work hard As step off soapbox Ill now announce Article com plete RC Soaring/Blakeslee Continued page 49 once week purchased two Roke kits Tony SB-l0 ASW-17 SB10 nearly complete real reason letter tell about fooling around Sagitta family Sailplanes discovery Missing Sagitta given broken 600 quickly repaired flew its pants off graduated 900 Cumic friend gave 600 also Sagitta XC al ways amazed no way get kit since has withdrawn Airtronics started looking Sagitta family Sailplanes comparing wingspans planforms polyhe dral angles tail moments etctrying under stand what made ships fly great Yes Eppler 205 common denominator 30/100 poly angles same missing link found compare wingspans ter need establish baseline before going further primary interests Sailplanes IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure aileron elevator rudder throw Takes guess work out trimming out airplane quality toot complete instructions logbook carrying case5795 -I PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass Sited nylon adjusters included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket 9695 Include 92 SOIltem UPS esidents Add 6% Sales Tan GATOR R/C PRODUCTS 3713 Pompano Dr acola FL 32514 1 476-8639 flying high long Cross-Country So tends make want large ships good pen etration qualities should explain did what did first Cumic Plusstretched span 130 118 increased stab area 15% Right out blocks ship thermalled exceptionally well penetrated beautifully Three dubbed Cumic Plus Plus have built flown very success fully However super thermaling ship it still ultimate X-C machine mainly because visibility problems high altitudes Now Missing Sagitta mic Plus 118-in wingspan Plus Plus 130 Sagitta XC 174 inwell measurements plus photograph 600 900 XC taken contest two years ago led believe something missing 140/150-in range After some initial layouts thought looked like Missing Sagitta would fit requirements fine X-C ma chine also outstanding all-out Thermal ship Sagitta XC big heavy tend requires assistance launching Cumic Plus Plus little too small wanted plane didnt need FAA checklist flythe famous KISS keep sinople stupid RMcM principle No high tech except airfoil Just rudder elevator spoilers photo shows both experimental Sailplanes Plus Plus smaller Missing Sagitta Ive named Cumic XC larger used Bob Sealy Jupiter fuselage stretched 6 same length Sagitta XC 57 wing three-piece bolt-on design fuselage cut out pro vide saddle area wing center section rest Michael Seligs 3021 improved E205 about 1 % thinner used air foil After new Sagitta family member de serves little sprucing up center panels 39 side con structed % x 3R-in main spars 0007 car bon fiber outer sides % x A-in drag spar also used Spoilers five bays wide Tip panels 36 making total span 150 Chord main panels 12 mak ing airfoil thick enough good strength tal area 1656 sq Construction typical D tube t selected strength noah spans 36 has NACA 0010 section thick root first flights went very successfully Cumic XC real dream ship fly grooves very well turns very stablelike giant Paragon S3021 seems have good speed range required X-C flying works lift well Sailplane weve flown Continued page 153 PLUG-IN WING ADJUSTER KIT Four glass filled nylon brackets included key wing panels front rear allow accurately adjust panel straight flight complete hardware & instructions5995 NG TUBE & SOOCETS Aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 dia x 2S 895 1diax2S 995 1diax3S1495 148 Model Aviation RC Soaring/Blakeslee Continued page 148 12-ft wing plus wide chord make easy see extreme altitudes Landings full spoilers Up elevator fairly easyit just mushes slowly no Dutch roll think its impressive majestic ship both air ground Perhaps nonstandard-size planes like Cumic XC economical kit doesnt stop being excep tional Sailplanes Whats next 192-in Super Sagitta XC S3021 airfoil After SB-b com pleted Wasnt marvelous piece engineering Alexs part seems quite logical once hear story demise Sailaire theres no kit US market know 135/150-in-span rangewhich makes good sized combination X-C AMA Thermal Duration contest ship Sailaire speedy enough X-C Sailplanes size both ailerons have popu lar British Open Class Thermal contests some years havent caught yet Any Airtronics reading LSF News President Bob Steele sent news re lease announcing LSF has new address PO Box 517 Winfield IL 60190 Bob said new address will provide better service mem bers less work LSF staff Please make change voucher youre think ing Source Rohacell letter just re ceived modeler may have heard Matt Gewain Im very serious FAI modeler fly mostly FlA Free Flight Towline Gliders know FlA best Ive also flown other events including RC Soaring off past 28 years flying FLA Ive good fortune make US team few times recent years well attend some other im portant international contests impressions acquired international competitions US 5-10 years behind advanced countries mod eling technology reflected both design construction methods wanted use state-of-the-art modeling materials tech niques saw Europe However found ma terials available except large quantities So started new company Com posite Structures Technology make supe rior modeling materials available everyone US case youre familiar Rohacell what spec sheet says about Rohacell light rigid high-quality poly methacrylimide foam available 19- 31-lb densities Most impressive its strengthto-weight characteristic compared balsa sty rene polyurethane foams Rohacells high compression modulus makes ideal use core high-strength composite structures pure white color can shaped stan dard woodworking techniques should hot-wired because harmful vapors may formed Most modeling adhesives suitable cluding epoxy polyester slow-cure cyanoa crylate Since Rohacell nonporous adhesives requiring evaporation cure like white glues recommended Matt sells Rohacell sheet thicknesses 10 15 20 30 40mm larger incre ments up 50mm thick Thicknesses up 2mm 31-lb density thicker sheets 19-lb den sity comes various lengths widths /2 x 2 ft up 2 x 4 ft Its cheap piece 2mm x 12 x 48 costs $1675 com mon use Rohacell sandwich core ma terial between fiberglass skins molded wings 100-in plane would need four sheetsor $68 worth Rohacell hey youre talk ing world-class Sailplanes quality efficiencynot costare considerations Matt also sells Kevlar fiberglass cloth Safe-T-Poxy epoxy resin mold release spray self-sticking synthetic rubber strip seal ing vacuum bags Because expert mod eler himself can rely Matts advice about best materials applications Send SASE information complete ordering de tails Composite Structures Technology 3701 Inglewood Ave #268 Redondo Beach CA 90278-1110 telephone number 213 5427393 Strength glue joints Youve heard re mark several times before about good newsletter South Bay club Northern Cal ifornia Editor John Dvorak has knack get ting very informative articles members Recall two members Seth Dawson Rich Spicer 89 US F3B team re cent issue Silent Flyer article Reinhard Lahde Bob Bayard contained such important information about gluing carbon fiber felt bad passed along Sailplan ers process continuing some work us BB started strength wing spars felt need find best way glue strips carbon-fiber/epoxy laminates other other materials such spruce finding glue strengths aliphatic glue gap-filling cyanoacrylate fast 5-minute medium-speed 30-minute slow epoxies Slow epoxy kind sets up about three hours best left overnight harden strength interested shear strength ability glue joint resist sliding failure along glued surface typical test sample shown sketch have tested adhesion carbon fiber spruce balsa carbon fiber itself PullCarbonPull FiberSpruce Epoxy does bond well epoxy sur face carbon fiber/epoxy laminate lam inate surface partially unsanded Cyano somewhat tolerant some shiny surface spots laminate Best course sand laminate surfaces until no shiny spots remain results reported based no shiny spots preparation reason know about shiny spot problem too thorough sanding earlier phases inquiry best joints made least glue clamping two pieces excess glue squeezed out made test pieces thicker glue joints glue pulled apart chunks rather shearing along whole sur face Strength very lowno about well-made joint good joint between CF balsa fails pulling slivers wood off piece Bonds beDESIGNiD DIVGLOPID 35 0815 MACSIN THE LEADER IN COM PETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266/778 13677/8 14677/8 1567 16678 PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCHPRICE 534 634 72833/,456 833/4568 845667 94566/z77/z 10 4566 106W8W 106EW 114677A7748 115W 116EW 67 4W 125W 1256 1356 \J 1456 1556 164N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N5/N SERIES 400C 8I66777/4 9777 W WIDE BLADE EW EXTRA WIDE N NARROW March 1989 153 Tr ES 100 NEW WANNA RACE NORTHEAST AREA BEGINNER RACES 0-500 * FORM-i * FAI %j Instructions Club Programs Information Contact NORTH EAST PYLON RACING ORGANIZATION 119 DEAN AVEFRANKLIN MASS 02038 Tel 508 528-4043 203 673-2000 Length 0087 Span 6 Wing Area 750 ag 775 8SOa Waght Offered Super Deluxe Pm-Built Kit $45000 Completely Finished Model Call info & pricingVISAS MASTERCARD WELCOME aatS1M5Iw5ifofoAIfrs 406298-0311 FAXS 4082g8-6538 PLAIN CRADLE-2 Purchase local hobby shop order direct Completely Fuelproof Wide Fuselage Unbreakable es Flat Perfect Field Shop Same Day Shipping net aaUaN eat, muea fUrfuad Marty Berr 84 Stonefield Trail South Windsor CT 06074 Alao sae ad full satisfaction full refund ..... *316 par yard Lataat Japan. P3gm DesIgn Dalgned & Flown TOP Japan. Pilot Sultable FM AMA CI.. eRiSpa0m Rase itklsYra 4 ThlarcswaIisp hUndr & Phsoi Phesal tween two materials weakest cause balsa inherently weak tension Joints between CF spruce much stronger CF/balsa fail combination pulling some splinters out wood shearing some glue itself Joints between CF CF fail mostly separating gluelaminate interface well-sanded surfac es strength CF/CF joints close CF/spruce maybe bit Some joints taxed tension machine reengineered order break samples average breaking shear stress sam ples both CF/spruce CF/CF given table As table shows aliphatic glues make weakest bond should used carbon fiber Next come epoxies order cure time slowest being best Cya noacrylate strongest quite bit twice strong slow epoxy four times stronger fast epoxy summary want good joint tween CF laminate spruce other laminate sand until shiny spots disappear clean ac etone apply slow Zap sparingly clamp squeeze excess glue out Thats best joint thanks Reinhard Bob doing important research main use CF strengthen spruce wing spars tensile strength CF laminate normally much greater glue joint its important best bonding job can Otherwise CF little help aiding spar resist bending because glue joint lets go wing goes snap confess no idea slow cyano much better slow epoxy although Id done few informal peel tests both Another item about cyanos cure speed strength de crease sit around bench Unopened cyano lasts indefinitely freezer dont use up bottle few months its wise chuck Upcoming Cross-Country races X-C Racing fans will want make note two Eastern events Fifth Annual Sugarloaf Classic will held May 20-21 Dickerson MD about 40 miles northwest Washington DC Capital Area 154 Model Aviation Average Strength Gluepsi Aliphatic1220 Epoxy-fast 5-mm 1530 Epoxy-medium 30-mm 2190 Epoxy-slow 3-hr 3410 Cyanoacrylate6560 Send $1796 plus *200 shipping handling 1/4 1/3 Scale Sizes 6 plus *200 S & I-I THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great perfor mance Thermal Charger fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Soaring Association sponsor popular race fact its popular channels RC38 RC56 plus few new lower channels already taken Pat Flinn Detroit won last year Don Gougnnor/Terry Luckenback sec ond Sarget/Dickes/Sowder third less quarter mile info contact CD Guy Dickes 6331 Paddington Lane Centreville VA 22020 phone number 703 830-3631 Central Ontario Glider Group will try ob tain FAI sanction years Dash Cash make official F3H International contest Dash scheduled July 1-3 will held near Cookstown Ontario has popular event also deal year cant send entry form before April 15 will make fairer everyone have shot frequency However can get entry form right now contacting Neil Tinker 35 Cairnside Crescent Willowdale tario M2J 3M9 Canada Soaring high finance Over past few months Ive described Sailplaners wonderful features new Airtronics Vision 8SP radiothe ATRCS pro nounced A-Tracks computer encoder described January 1989 column Im excited about radio because ATRCS will eas ily tricks required multitask Soar ing question price comes up $850 list four servos sometimes look disappointment sets try explain its much considering what get also consid ering actual over-the-counter price retailers will almost assuredly substan tially less course what spend hobby personal thing whats bad per son too much another start talk ing over $500 theres no doubt impor tant investment territory worth proba bly consider Soaring main interestas serious sport just fly Gentle Ladies Oly us really need good four-channel set like Airtronics Vanguard Futaba Conquest can bought $150 less fact can fly lot very competitive Thermal Duration ships like Nats-winning Larry Jolly Model Products Meteor just three channels Bob Dodgsons Windsong ailerons flaps performs great four channels lot mechanical mixing have itch move up mid dle ground Randy Reynolds talked about last monthto fly ship ailerons flaps all-electronic coupling mixingthen Vi sion 8SP radio probably answer Its much less costly anything comparable US marketwith exception course Air tronics Module 7SP transmitter converted ATRCS $300 Control Systems Laborator ses give tale little perspective let re late some history first digital proportional ra dio set came Out about 1963 Bonnet Digi mite sold over $900 1965 bought first digital set Kraft six-channel cost bit over $600 same year also bought small Oldsmobile cost $3000 similar new car today would about $ 12000or four times much logic top-of-the-line ra dio should now sell over $2000 believe radio sets have improved lot over past 23 years cars have reason sophisticated radios relatively inexpensive today because competition space age computer-on-a-chip technology Have become spoiled being able buy very good reliable set about same price quality kit Id say answer yes fliers now buy whole radio set planes because price less receiver servos switch harness battery bought separately look way transmitter free Editors note might want read George M Myers Radio Tech nique column month since talks about very problem RMcM So moral story seriously en joy wonderful hobby/sport have ambi tion step up full-house plane cost first-class radio really much com pared lots other hobbies could get mixed up Besides live once Cash VISA Certified Cheek R/C EXTRAS 712-9434102 RR1 Box 28B Sergeant Bluff IA 51054 LMarch 1989 155 OPS orYS parts close phor 1-800-535-2568 Dealer Inquiries Invited SThe P Comfwacro% 7m&z4 r CARBON FIBER LAMINATES Aerospace Composite Products offers variety rigid carbon fiber/epoxy sheets add stiffness almost material- fiberglass foam bal sawood laminates can used reinforce foam wings leading trailing edges wing spars Carbon Fiber bonds easily slow setting cyanoacrylates 5-minute epoxies laminate can stripped narrower widths TYPICAL INSTALLATION CL-i 007 thick 1x48-$500 1x72-$70CNA FOAM WING CL-2 014 thick 1x48-$800 1x72-$11C0 Send SASE information additional sizes products Add $300 shipping handling Calif residents add 6% tax Overseas orders add 15%-Order COD send check money order IIThe source lightweight materials Stand Off Extra 230 Kits Scale Now Available Three Sizes 1/3 Scale Kit plus $15 shipping 30% Scale Kit plus $15 shipping 1/4 Scale Kit plus $10 shipping Also Available Weeks Special plus $15 ship PO Box 16621 Dept M Irvine CA 92714 714 250-1107