EXCITEMENT California being caused flying season Mark Allens new Falcon 880 de sign ship spans 112 has beautifully made Kevlar-reinforced fiberglass fuselage Se hg 3021 airfoil ailerons/flaps balsa-sheeted foam core wings modified Schuemann planform distinctive feature upswept wing tips outer 10 all-flying stab rudder built-up balsa construction Four servos wings ailerons flaps making computer radios like Airtronics Vision easiest way go Visions threeposition Launch/Cruise/Speed switch permits pre setting entire trailing edge three modes crow landing configuration flaps down 900 ailerons up 250 makes hitting spot much consistent regular fourchannel radio using Y connectors would fly Falcon youd give up nice mixing preset functions Falcon does incorporate thing overly unusual days However Mark seems have brought off perfect com bination model Sailplane design elements does Falcon look right its early com petition record quality workmanship kit making very hot ticket fact Marks problem has keeping up de mand asked Mark hed give us quick rundown what thinking about designed Falcon what said Falcon 880 designed give Thermal Duration pilot highest possible per formance versatility being difficult fly designed clean sheet paper New technology form Selig computerdesigned wind-tunnel-tested airfoils Schue mann wing planform theory F3B competition ex perience computer radio flexibility used achieve design goals Falcon Airfoils combination Selig 3021 3014 used because good lifting capa bilities thermaling speeds very low drag high speeds S-30 14 used tip elim inate tip stalling can problem swept-back tips Wing planform Wing vortex drag 50% total Sailplane drag thermaling speed Schuemann wing planform dramatically reduces drag thereby increasing L/D reducing sink rate better Thermal performance Upswept tips increase stability maximize Schuemann wing planform efficiency com petitors after seeing well Falcon flies have put type tip planes re port increase performance sta ble easier fly Sailplane am very interested continuing development tips would welcome comments persons have tried planes Overall size Much time spent computer determine optimum wingspan aspect ratio things such aspect ra tio vs Reynolds number wing strength over handling characteristics carefully ana lyzed result 112-in span 1425 pect ratio slightly smaller cur rent breed Unlimited Class Sailplanes fers advantages biggest advantages launching landing Most club winches used contests somewhat limited power line speed its smaller size overall low drag Falcon well matched winches can instantly accelerate top launch spectacular zoom Crisp aileron control stow speed big 9fl0 flaps opti mum size give Falcon unmatched landing ac curacy needed winning contests Drag Low overall drag achieved com bining very low-drag fuselage low-drag air foils gives Falcon 880 best L/D penetration Sailplane manufactured US Summary Falcon 880 offers competi tion highest performance versatility yet very easy forgiving fly Its low drag enables Falcon outlaunch outdistance competition searching lift Once lift 48 Model Aviation Radio Conoi Soaring Byron Blakeslee 3134 N Wlnnebago Dr Sedalla CO 80135 Flite Line Composites new Falcon 880 has phenomenal contest record California Wingspan 112 Byron has lot say about Glider months columnn Wing has upswept tips flaps ailerons Fuselage Keviar-reinforced fiberglass Photo below shows plane crow configuration fast descent flaps down 90 ailerons up about 250 Tom Rents daughter Sharla looks mighty happy hold dads modified Olympic 88 new wing designed built 25 MRCSS members used primarily high-tech replacement Olympic 650 Rake on-board ESYM expanded-scale voltmeter row 10 LEDs top th@ circuIt board light up sequence tell state charge receivers NiCd battery pack info column fpund thermals best As mentioned above Falcon very impressive contest record first half 89 Among notable showings wins Bob McGowan both Western States Cham pionships Modesto LSF/SBSS Nation als Morgan Hill CA second sixth NSS/TOSS Masters Contest Fred Weaver Bob McGowan first Hans Weiss Memorial Slope Race Daryl Perkins first third 60-plus-contestant North Coast Soaring League/SBSS March contest Bob Mark Personally Im very anxious try Falcon because looks like ideal ship new Sportsman Multi-Task SMT event fact entry RCSD Challenge rule SMT planes full details discussed minute weight limit 75 ounces stock Falcon weighs 60 65 oz giving about lO-oz/sq-ft wing loading could add 10-15 oz ballast Speed task mak ing loading respectable 123 oz/sq ft legal weight Going contest results Falcon able compete nicely Duration big boys Lovesongs Meteors etc So youd expect Falcon capable doing well threetask Duration Speed Distance SMT events very encouraging because think 112in-span plane makes handy size all-around Glider Its big enough perform well small enough too much handful espe cially windy weather Itll go up easily hi start fun flying also power-zoom off winches contests strictly Slope flying Mark Daryl com pletely cover Falcons wings 1 5-oz per sq yd Ed glass cloth use arrow-shaft hinges brings weight up 74 ounces can add up 25 lb lead move CG back 3/ ina condition Mark says itll really smoke Mark also said Michael Selig himself called order Falcon kit Mark asked Michael based recently completed Princeton wind tunnel tests would want different airfoils plane standard S-3021/3014 com bination Michael said No Sounds good enough mc Mark selling semikits consisting finished fiberglass fuselage fitted canopy foam cores full-size core beds plans about $115 complete kit adds balsa wing sheeting balsa sticks fiberglass cloth carbon fiber reinforcements wing hard ware sells $175 Both kits will cost few extra bucks shipping kit looks like itll build pretty fast especially wings vac mayor decals DECALS PRESSURE SENSITIVEWATER TRANSFER Over 750 Select *7 1/4 Scale18 Sheets * 60 Size38 Sheets * 40 Size38 Sheets * Propeller Decals . WT Only 6 Sheets3 sizes ea * Kill MerkingsWT Only6 Sheets * Nomenclature Markings 3 Sizes-12 Sheds Black White copy * Letters Numbers 1/4-3/8-I/2-5/8-3/4-7/512344-13116 10 colors See color chart * Flags. American United Kingdom Confederate * Stars 10 Colors 8 Sizes pias Sheet Assorted Sizes * Trim Sheets 4-3/4 26 10 Colors see color chart Authentic model insignias pressure sensitive %d r47e9 mater transfer 1/4 scale 40 end 60ckSS4decals size propeller decals World War II kill mark-major ings stars flags letters numbers trim sheets NORTHEAST SCREEN GRAPHICS 21 FISHER AVE. EAST LONGUEADOW MA 01028 TEL 413-525-4110 INJECTION MOLDED FUSELAGE WING STAB& FIN PREFORMED LANDING GEAR STEERABLE NOSE WHEEL NYLON MOTOR MOUNT& BEARING STEERING ARM HINGES PUSH RODS MISC HARDWARE VACUUM FORMED CLEAR CANOPY AND EXHAUST STACKS 3-4 CH WE INVITE DEALER INQUIRIES FOR INFORMATION CALL OR WRITE 0 7_ m C 0 E C E 2- C m C C I m m SUCKER-KIT.. $5995 VHS Show & Tell Video $3995 Add $400 shipping & handling Ml residents add 4% sales tax Send Si 00 SASE Icr product list Samples real wEd veneer skins Product List Includes flapless Arrow Shalt Hinges Carbon Tow Mylar Sheet High-Tech iems Dealer Inquires Welcome SEND CHECK DR MONEY ORDER TO PO Box 866 Lapeer Ml 48446 313 664-3330 October 1989 49 Another Great Twin AmDhlblan G & P SALES GRUMMAN ALBATROSS HU-16BCONSOLIDATED PBY-5A CATALINA 81 inch wing span e 810 sq inches 13 lbs 1 inchwingspannoo9sqincheaell lbs nTwin 40 2C engine size 5 FIberglass fuselage Foam Twin 30-40 engine size Fiberglass fuselage Vacuum wing stab cores Includes wood s Vac formedformed clear acatate cockpit blisters Vac formed cowls nacellesstyrene cowls end nacallas Preformed landing gear $25995 plus shipping tax applicableland operation Retractable wing floats Retractable landing gear ktt 85$23995 plus ahipping tax applicable 90 mInute VHS video buIldIng flyIng *246690 minute VHS video building flying .. *2488 G & P SALES 410 College Ave Angwin CA 94508 965-3866 SURE FLITE 40 Power 51 WINGSPAN AIRACOBRA SUPER FUN SCALE 40 SIZE WARBIRD FAST ASSEMBLY EASY TO FLY U SURE FLITE ENTERPRISES 23015 DEL LAGO DRIVE LAG UNAHILLS CA92553 714 855-4402 Composite Aircraft ENUn & Supply FAX 649780 TAIBI iCH3646___________3NCH3646 BALSA WOOD STICKS 1/16-INCH3645 1116111606 1/1603/3207 11161/80611 1/16o3/160913 1/161/41015 1/163/81317 1/1601/21620 1/163/42126 3/32-INCH3646 3/320 3/320811 3/3201/80913 3/3203/161015 3/32 o 1/41316 3/3203/61419 3/32 0 1/21621 3/32 0 3/42431 Double Balsa Wood Prrces Spruce Bauuaood OScirs 1/8e 1/80811 1/603/161115 1/801/41317 1/803/61621 1/80 1/21724 1/60 3/42533 3/1 6-INCH3648 3/16 03/161317 3/160 1/41419 3/16 o 3/81821 3/160 1/21825 3/160 3/42838 1/4-INCH3648 1/4 0 1/41621 1/403/81825 1/40 1/22129 1/403/43142 5/16-INCH3646 5/1605/162027 5/16 o 3/82230 5/16 o 1/22736 5/16 o 3/43952 3/6-INCH3646 3/8 0 3/82737 3/80 1/23041 3/8 o 3/44460 1/2-INCH3648 1/20 1/23749 1/203/45270 TRIANGULAR CUT BALSA 1/4 0 1/40 3624 3/803/803629 1/201/203837 3/403/403647 10103661 BALSA PLANKS 3/403038178 102036164 103036230 104036303 202036230 203038329 2u4o36464 303038490 304036680 BALSA SHEETS 1-INCH3648 1/180 12736 3/32 13040 1/8e13344 3/18013749 1/4014157 3/8 015372 1/2018588 2-INCH3648 1/32023040 1/16 023648 3/32 0 24154 1/8e24660 3/180 25472 1/4e26384 3/60277103 1/202113150 1/32034053 1/16034358 3/32 0 35270 1/80 36080 3/16 037295 1/4 o 384112 5/1803103134 3/903120180 1/203150200 4-INCH3648 1/32046587 1/180473101 3/320482109 1/80495126 3/1804114151 1/404131193 3/804182271 1/204219325 BIRCH PLY WOOD 1/840 120 12175 1/640 120 24350 1/64o 12 48700 1/840480482800 1/32o6u1252 1/32u120 10105 1/32 012o 24210 1/32012049420 1/160801252 1/160120 12105 1/16 0120 24210 1/16012048420 3/32u6o1291 3/330120 12183 3/32 012u 24328 3/32u12048852 1/8060 1289 1/80 120 12178 1/8 12 24356 1/8o12o48712 3/160601274 3/16 012o 12146 3/16012024293 3/18012048595 Superior Aircraft Materials 1/40801274 1/40120 12146 1/4 0120 24293 1/4 012048085 3/80 120 12150 3/8 0 12 0 24360 3/8 0 12 48720 1/20120 12202 1/2012024405 1/2012048808 LITE PLYWOOD 1/801201258 1/6 0 12 024112 1/6 0 12 048224 TAPERED TRAILING EDGE3646 1/8o 1/22230 3/16 0 3/42940 1/4 e 14255 5/180 14481 3/60 1/a5272 12020-G Centralia iian Gardens California 90716 865-3220 Handling Charge $5-OG $300 COD mum Order $2000 FOB Factory accept Personal Checks COD fornia Residents add 6% Sales Tax uum bagged Contact Mark Allen exact price deliv ery info Flite Lite Composites PO Box 1493 Windsor CA 95492 telephone 1-707/8383390 Oly 88 project Tom Rent treasurer newsletter editor Minnesota R/C Soaring Society sent interesting letter club recently designed alternate wing Airtronics Olympic 650 kit can tach existing 650 fuselages wing modern design combining Selig 3021 airfoil sheeted foam cores ailerons spoilers uses straight dihedral can built one-piece two-piece wing attaches top 650 fuselage elastic bands -MRCSS kitted over 25 wings November sold quickly within club $10 kit included cores plans sheeting control cables root ribs joiner rod/brass tubes control horns committee mem bers designed built wing under expert guidance Bob Scaly named plane Oly 88 year conceived Several Oly 88s have competed first few contests 89 season good results against Prodigies Sagitta 600s Gnomes project helped members experi ence modern composite construction techniques migration ailerons advancing effi cient airfoils very pleased re suits Unfortunately club wont manufac turing kits However article Oly 88 may submitted MA later year magazine buys plans would avail able through MA s Full-Size Plan service Well see Enclosed photo daughter Sharla age four years proudly holding Oly 88 opted use plug-in arrangement Oly 88 wing modified tail feathers match shape wing model has 72-in span 619 sq area weighs 35 oz flies great both Slope Thermaling Thanks very much story photo Tom excellent example club members can get together work project benefits everyone especially stepping up poly ships ailerons though MRCSS wont making wing kits perhaps Bob Sealy could convinced cut some cores Maybe Toms Oly 88 started life Oly 650 sure doesnt look like now Quite nice looker both daughter Sharla plane Another lesson Oly 88 project start something flies well make demon tweaks friend Randy Reynolds calls have good chance success Modelers temperament born tinkerers Id bet us has ever built kit exactly supposed con structed know can improve de sign Go aheadhave fun Thats what Soar ing hobby about Roke onboard ESYM Roland Kern maker Roke line beautiful Scale Sailpianes Germany has come out important item insurance plane As can see photo its little electronic gadget row 10 mini-LED lamps across top two left red next two yellow six right green wire up Roke Expanded Scale Volt Meter pig tail suit radio plug unused receiver servo socket Assuming fully charged battery pack turn receiver switch lamps will consecutively flash starting left set tle down green lamps right illuminated what reading green lamp farthest right indicates 51 volts next 50 volts etc Sometimes two adjacent lamps will indicating voltage tween two values Make sketch 10 lamps Count off tenths volt youll see leftmost green lamp indicates 46 volts low re ceiver pack can safely used two yellow lamps indicate 45 44 volts R L about lowest voltage will drive servos red lamps indicate 43 42 volts definitely crash time really neat thing about onboard ESVM reads actual voltage pack onHERES UNIQUE TIME PIECE THAT FEATURES FAMILIAR FACE THE ALTIMETER WALL CLOCK Perfect den office Quality quartz movement Full 1 year warranty Four other models available Horizon cIock DG clock VOR clock & Airspeed thermometer DEALER ENQUIRIES WELCOME SEND CHEQUE OR MONEY ORDER FOR $3996 UPS T& AIRUNE SUPPLY CO 98-116 PINELLAS BAYWAY TIERRA VERDE FLORIDA 33715 TO ORDER TOLL FREE 1-800-848-2739 FLORIDA RESIDENTS ADD 6% SALES TAX 50 Model Aviation Last Call Module 7SP ATRCS retro-fit program will end Iecember 311989 sure get conversion soon ATRCSTM Advanced Technology Radio Control System Converts Module 75P advanced computerized control system Stores four aircraft setups Includes seven different servo configurations Individual surface travel limits centering Single switch presets launch speed modes Full trailing edge control Enhanced mixing functions Crow landing capability User selectable cross trim capability Flap stick reversing Elevator camber VTR Automatic selection high ail rudder mixing launch landing modes Fully installed kit year limited warranty Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 Airtroni~ Module 75P registered trademarks Airtroni Inc der actual loads say turn re ceiver switch 50-volt lamp lights up indicates voltage fully charged pack under minimal load ie receiver servos idling Current draw may 50 100 mA depending type re cetver Now turn transmitter stir sticks around servos may drawing high peak amperage total actual load pack could up around /2 1 ampere load voltage will drop two three tenths volt can actually see whats happening lighting up lamps lefi indicating 50 volts stop moving sticks 50-volt lamp should come back worst things can happen Glider have bad servo binding con trol surface puts too great load servo Either case results excessive current draw can quickly run down pack can get indication problem like ing far down green lamps light up work transmitter sticks Itll take some experience Roke ESVM before feel confident about lamp lit versus ining flying time Re member four-cell Ni-Cd receiver packs have relatively flat discharge curve down 44 volts Below curve falls off shelf Probably short flight should attempted voltage down 47-volt lamp can get Roke ESVM Roke im porter Tony Arnoux Imports Inc 1744 NW 82nd Ave Miami FL 33126 price $25 postpaid people flying Scale planes costing $1000 extra $25 certainly worth peace mind Come think plane doesnt have cost much make onboard ESVM worth correspond Tony might want ask him about Wik Rowing other German Scale ships now bringing Sportsman F3B update As youve probably heard quite few us sportsman fliers very excited about trying new eventwhich might better called Sportsman Multi-Task Soar ing SMTNo SMUT idea fly simplified Duration Distance Speed tasks similar F3B big using Sailplanes considerably tamer real F3B planes fliers have indicated desire partici pate contests bit challenging straight Thermal Duration strict F3B rules What talking about mid dleground Soaring Randy Reynolds dis cussed February column Take another look dont remember Sailplaners Ive talked about SMT just about have strong reactionsboth pro conbut mostly very positive makes think may something good Jim Gray publisher R/C Soaring Digest took bull horns said OK lets have RCSD Challenge Design Competition select example competitive Sportsman Multi-Task Glider lets recommend rules planes contest tasks clubs around country can run more-or-less similar SMT events Challenge Rules commit tee turned out Jim John Dvorak Don Edberg Gus Peleuses Randy Reynolds self vote rules planes tasks completed June RCSD Challenge win ning plane selected July Ill have give outcome next month since Im writing June what committee voted recom mend SMT rules PlanesOnly rule 75-oz maximum total weight including ballast As long planes weight below 75 oz anything else OK No restrictions span wing loading kit cost con struction materials controls radios original de signs builder model etc Tasks Duration using Percentage Slot system same new F3J International Thermal Dura tion task F3B landing tape recommended Dis tance using AMA Distance Task T7 per rule book page 93 Speed using AMA Speed Task T8 per rule book page 93 safety lineexcept recommend flier get two tries back-to-back better time counted Continued page 149 AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 Z ber 1989 51 1ursu 1i iou 1111 mrii A SHEETS 36 45 30 1 162 33 3322 40 162 43 3162 49 14 2 56 1 323 37 1 203 37 1 163 32 49 31 3323 44 56 37 18 3 54 71 46 3163 62 62 55 143 73 95 61 5163 85110 36 3 66124 71 123110155 34 3165191 1164 56 7646 3324 20 84 56 16 4 6010666 3164 93122 75 14 411013464 36 4165220139 2 4225261 MATCHED SHEETS 42 3324100 154106 3164120 144131 BALSA STICKS 3648 1161409 1163610 161214 332 1410 332 3812 332 1216 18 1606 16141116 18 361216 16 121024 3163161116 316 361720 316 122230 14 141624 14 391926 4122130 14343444 14 14055 5165162126 36 362737 39 123246 36 344255 36 15270 12123653 12344062 12 15876 56 584665 34 346790 * LIGHT46 LB BALSA TRIANGLES36 WOOD36 25353 68300353 356353 45363 558 3 669 BALSA PLANKS364 304 65822 5056 00242 14z6013335 1123275116463 11243603324100 22225164115 233253164133 24435144156 33495364236 34666124322 TAPERED SHEETS36 14265 14365 36266 36396 123120 LONE STAREPOXY SoLol695 696 10,598 30o,o596 TRAILING EDGE 36 14132 S161 1439 3611246 122~70 INSTANT GLUE 1 0 Thck 296 1 0 Tloo 296 2, TSck 550 2o 15n 550 must try 4-6 lb balsa BASSWOOD48 31631626 3161435 31631636 3161246 3163465 11411442 1431649 143460 36 3660 361270 3163490 121290 1234100 BUNDLE DEALS 301116336699 201164361035 20332 60 15332436955 1516336735 10116436695 16316336920 153164 36635 1014 336655 10-14436930 1036336670 53164 5 512336540 61124361060 15332446665 616446500 6316446600 614446645 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 116 1161725 16 142026 16 382232 3163162636 114 143450 14 364055 1141124565 316s 364966 36 126077 12 1126666 1125347567 SPRUCE TRIANGLES 316 316 1212 34 IStS175 1I8x12350 ______________ __________________ 114s6 275 LONE STAR MODELS 1623 57th Se Lubbock TX 79412 Cant 48 Handling Charge pay UPS Add $300 COD $400 extra PP APO FPO Stases accept Vise MasterCard personal checks COD 6/ % tax Texas US currency Minimum Wood Order $1000 SAm53 HARD MAPLE 1 4 36 3636 36 1 2 3l6 34 1234 18 40 46 50 66 66 BIRCH DOWELS36 16 39 31611 1414 51625 3832 3PLYBIRCII 48 1164x12835 1132x12475 1116x12475 1I8x12495 RC Soaring/Blakeslee Continued page 51 Note tasks use working prep aration time CD assembles flight group everybody ready says Go No relaunches allowed except case winch organizer timer flagger failure An ideal SMT contest would have equal num bers of three tasks CDs en couraged mix-n-match listed tasks wish use other tasks option exam ple contest could three rounds Duration two Distanceor combination tasks task normalized 1000 points contest points simply sum task points Duration Distance flown man-on-man except contest too small fewer say nine entrants mix up flight groups Club winches can used should about equal power contestants own winch can used available about same power other winches Ballast can added removed time long total weight does exceed 75 oz As hero Al Doig would say Howzat realize number folks out readerland responding Terrific may vast Its fact bulk Glider guiders US sport flying Gentle Ladys Oly tls such smaller group Sailplaners enjoy contest flying maybe quar ter half will actually give SMT try Perhaps SMT will go way F3B ie enough fliers get interested develop necessary critical mass start chain reaction However Im hoping SMT will have broader appeal because its much easier Sportsman-level fliers get simpler clubs run Itll take few promoters club get ball rolling Once people find out exciting much fun Distance Speed tasks fly SMT could really take off As MA Soaring correspondent feel duty point out kicks satisfaction can experience moving up caliber planes Taking analogy full-size Soaring its similar advancing primary trainer like Schweizer 2-22 intermediate ship such Schweizer 1-35 finally glass racing beauty like Schempp-Hirth Discus 2-22 pi lot perfectly happy just being up air once tries l-35 knows hes faster responsive ship Its higher performance pro vides Soaring enjoyment Discus other step up ladder imagine its tough go back once youve flown Same thing models myself Im very excited about possibil ities Sportsman Multi-Task 75-oz rule easy fliers understand easy CDs administer specifically chosen keep planes being intimidating Sportsmanlevel pilots Lots good kit designs fill bill design own Pilots can get started what theyve got because just about Standard Class planes weight under 75 oz Planes will course vary sophistication pilot does well SMT will knows plane practices lot Also hop ing come up easy system placing SMT pilots Novice Intermediate Ex pert classes beginners will feel less trepi dation about flying experienced guys Contests dont have contests Clubs can schedule SMT Sessions just run Distance Speed tasks guarantee practic ing tasks will improve flying skills theyre fun boot Ill bet once 3U ex perience thrill racing neck-and-neck Distance task youll decide need faster plane Please let know what think magical design programs fol lowing letter John Hohensee pretty much clears up controversy over Johns com puter design program MaxSoar Its also very structive what MaxSoar Lee Murrays PC-Soar about John also wants let know new address S22 W27400 Fen way Drive Waukesha WI 53l88 telephone 4l4/52l-2472 Jeff Raskin correct says pro grams magical However think boo-boo can attributed excitenlent see ing useful new technology being made available modelers just got back National Computer Graphics Association convention sessions speaker showed slide think applies read Corollary Murphys Law Any sufficiently advanced technology indistinguishable magic Just MaxSoar PC-Soar magic neither programs used NASA McDonnell-Douglas Boeing pro grams approximate aircraft performance un der certain conditions reasons aircraft still test flown realize programs iii same class n3odelers have access Cray superconiputer Lee Continued page 152 October 1989 149 WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance BALSA HOT LINE Call fSOAf 745 6394 10 am6 pm Central Time SFLYEIACH 48 3I32x12700 118s12775 363116x12625 471l4x12625 643/8x12725 61112x12900 LITEPLY48 GROOVED LGMOUNTS 12 Inch 36341840 36 34632140 123431646 WOULD YOU SAW HOLE IN THIS FUSELAGE Der Svitch direct replacement on-board on/off switch radio equipment hides inside fuselage activated outside included bar magnet vibration proof reliable submers ible consumes no power easy use install Ideal scale sport float planes boats sail planes helicopters Dont ugly up fuselage Der Svitch TO BATTERY DERSVITCHBAR MAGNET CHARO NC JACK ECEIVER P00 Peo two basic models Model 1401 comes connectors use old ones $1995 Model 1402 comes connectors Futaba J G Airtronics $2995 Both models include installation instructions bar magnet Optionally available Model 1405 LED $895 red LED lamp 20 leads indicates radio state can installed instrument panel realistic effect Order Include name address specify models needed include check money order send Ragan/Barker Group 5050 Quorum Drive #741 Dallas TX 75240 Please add $250 perorderto cover UPS charges &TX residents add sales tax credit card orders call between 900 500 central M-F Please allow 2-4 weeks delivery RC Soaring/Blakeslee Continued page 149 believe products provide useful tool Sailplane fliers What MaxSoar PC-Soar Based input 30 design measurements such wingspan chord airfoil etc programs cal culate following 23 aircraft design parameters Wing area equivalent dihedral aspcct ratio recommended dihedral average chord angle incidence aerodynamic center loading Horizontal tail area average chord aspect ra tio aerodynamic center longitudinal stability fac tor Vertical tail area average chord aspect ra tio aerodynamic center tail volume sideslip stability factor Miscellaneous forward CG limit rear CG limit aircraft neutral point online help MaxSoar provides ranges average values calculated values way added Jeffs urg ing earlier letter Its thing able calculate sideslip instability factor its another have guide what should table flight speed Reynolds number tal aircraft drag coefficient sink rate lift-todrag ratio about 10 coefficient lift values generated about 50 num bers table calculating involves hundreds calculations Generating table re quires accessing data file 40 50 numbers representing performance polar airfoil being considered Incidentally currently pro vide about 70 airfoil polar data files adding data become available programs plot values can quickly understood designer MaxSoar PC-Soar allow designer overlay several aircraft polars com parison makes simple observe ef fects design changes compare different de signs see effect ballasting design course can output printer documenting design process discussing others Lee did just dream calcula tions upwe simply automated equa tions available modelers because peo ple like Martin Simons Lynn Cromer Ren Van Putte Alex Strojnik Michael Selig Blame Beron-Rawdon others published books articles aerodynamics mod els Are works last word model de sign Absolutely provide excel lent start would like address Jeffs specific com plaints mentions changing dihedral angle 200 sweeping wing 300 perform ance polars changing correct made conscious decision during writing programs disregard reduction projected area due dihedral decision based fact reduction lifting sur face 15 percent 100 dihedral average dihedral rudder-controlled Glider area reduction aileron ship 30 dihedral less 015 percent ab surd 200 dihedral reduces area 60 per cent program does calculate outlined several recent articles MA equivalent dihe dral angle based dihedral information pro vided designer equations programs indi cate effect performance due wing sweep unless affects area wingspan chord maintained wing swept area remains constant does affect perform ance according equations used would effects local angle attack various wing sections due circulation ef fects other sections what magni tude effects might dont know Jeff knows Lee would interested hear ing Jeff did mention wing sweep well horizontal vertical tail sweep correctly taken account calculation aerody namic centers neutral point tail volume etc Jeff mentions individual building up whole folders design comparisons states evaluations meaningless individ ual beta tester MaxSoar program has flown Gliders 20 years has achieved LSF Level IV needs eight-hour Slope flight Level V has participated local regional contests Great Race LSF Nats has also flown F3B quarter-final level has spent last 10 years studying model aerodynamics compiling de tailed design information has performed field tests effects ballast sink rate flying speed gracious enough let Lee use notebook design information provided airfoil polar data use libraries Since calculating virtually same parameters MaxSoar provided good check code compiling design information hand took about 10 hours per model did calculate performance polars Much time spent checking math mistakes computers dont make Now MaxSoar takes about 30 minutes including performance polars Since has flown designs documented believe him says MaxSoars calculated performance corre lates well flight experience Gliders performed relative another crux issue designer needs basis comparing design versus another believe programs provide basis As can see times mentioned above programs provide 20-to- 1 reduction time required calculate simple design pa rameters let alone performance data takes about five months build Glider few hours front computer can keep building Glider going perform expectations consider time well spent thanks John Hohensee taking time write above letter New Soaring club George Voss wrote let us know Oklahoma City Silent Fliers club now operation Sailplaners Okie City area can get information George 1403 Lincolnshire Road Oklahoma City OK 73159 telephone 1-405/793-9213 RC Aerobatics/Van Putte Continued page 53 nation can deviate normal still able score Hanno makes style rather following hes World Champion STYLE PREFERENCE isnt exactly same what Ive talking about Im talk ing about guy wants see pattern flown particular way other styles will appreciated Everyone like some degree some us very bad about know local judge likes low fast Thats worth extra point maneuver isnt fair either its human nature very difficult counter try let affect score 152 Model Aviation Introducing Invisible SvitchTM Made USA
Edition: Model Aviation - 1989/10
Page Numbers: 48, 49, 50, 51, 149, 152
EXCITEMENT California being caused flying season Mark Allens new Falcon 880 de sign ship spans 112 has beautifully made Kevlar-reinforced fiberglass fuselage Se hg 3021 airfoil ailerons/flaps balsa-sheeted foam core wings modified Schuemann planform distinctive feature upswept wing tips outer 10 all-flying stab rudder built-up balsa construction Four servos wings ailerons flaps making computer radios like Airtronics Vision easiest way go Visions threeposition Launch/Cruise/Speed switch permits pre setting entire trailing edge three modes crow landing configuration flaps down 900 ailerons up 250 makes hitting spot much consistent regular fourchannel radio using Y connectors would fly Falcon youd give up nice mixing preset functions Falcon does incorporate thing overly unusual days However Mark seems have brought off perfect com bination model Sailplane design elements does Falcon look right its early com petition record quality workmanship kit making very hot ticket fact Marks problem has keeping up de mand asked Mark hed give us quick rundown what thinking about designed Falcon what said Falcon 880 designed give Thermal Duration pilot highest possible per formance versatility being difficult fly designed clean sheet paper New technology form Selig computerdesigned wind-tunnel-tested airfoils Schue mann wing planform theory F3B competition ex perience computer radio flexibility used achieve design goals Falcon Airfoils combination Selig 3021 3014 used because good lifting capa bilities thermaling speeds very low drag high speeds S-30 14 used tip elim inate tip stalling can problem swept-back tips Wing planform Wing vortex drag 50% total Sailplane drag thermaling speed Schuemann wing planform dramatically reduces drag thereby increasing L/D reducing sink rate better Thermal performance Upswept tips increase stability maximize Schuemann wing planform efficiency com petitors after seeing well Falcon flies have put type tip planes re port increase performance sta ble easier fly Sailplane am very interested continuing development tips would welcome comments persons have tried planes Overall size Much time spent computer determine optimum wingspan aspect ratio things such aspect ra tio vs Reynolds number wing strength over handling characteristics carefully ana lyzed result 112-in span 1425 pect ratio slightly smaller cur rent breed Unlimited Class Sailplanes fers advantages biggest advantages launching landing Most club winches used contests somewhat limited power line speed its smaller size overall low drag Falcon well matched winches can instantly accelerate top launch spectacular zoom Crisp aileron control stow speed big 9fl0 flaps opti mum size give Falcon unmatched landing ac curacy needed winning contests Drag Low overall drag achieved com bining very low-drag fuselage low-drag air foils gives Falcon 880 best L/D penetration Sailplane manufactured US Summary Falcon 880 offers competi tion highest performance versatility yet very easy forgiving fly Its low drag enables Falcon outlaunch outdistance competition searching lift Once lift 48 Model Aviation Radio Conoi Soaring Byron Blakeslee 3134 N Wlnnebago Dr Sedalla CO 80135 Flite Line Composites new Falcon 880 has phenomenal contest record California Wingspan 112 Byron has lot say about Glider months columnn Wing has upswept tips flaps ailerons Fuselage Keviar-reinforced fiberglass Photo below shows plane crow configuration fast descent flaps down 90 ailerons up about 250 Tom Rents daughter Sharla looks mighty happy hold dads modified Olympic 88 new wing designed built 25 MRCSS members used primarily high-tech replacement Olympic 650 Rake on-board ESYM expanded-scale voltmeter row 10 LEDs top th@ circuIt board light up sequence tell state charge receivers NiCd battery pack info column fpund thermals best As mentioned above Falcon very impressive contest record first half 89 Among notable showings wins Bob McGowan both Western States Cham pionships Modesto LSF/SBSS Nation als Morgan Hill CA second sixth NSS/TOSS Masters Contest Fred Weaver Bob McGowan first Hans Weiss Memorial Slope Race Daryl Perkins first third 60-plus-contestant North Coast Soaring League/SBSS March contest Bob Mark Personally Im very anxious try Falcon because looks like ideal ship new Sportsman Multi-Task SMT event fact entry RCSD Challenge rule SMT planes full details discussed minute weight limit 75 ounces stock Falcon weighs 60 65 oz giving about lO-oz/sq-ft wing loading could add 10-15 oz ballast Speed task mak ing loading respectable 123 oz/sq ft legal weight Going contest results Falcon able compete nicely Duration big boys Lovesongs Meteors etc So youd expect Falcon capable doing well threetask Duration Speed Distance SMT events very encouraging because think 112in-span plane makes handy size all-around Glider Its big enough perform well small enough too much handful espe cially windy weather Itll go up easily hi start fun flying also power-zoom off winches contests strictly Slope flying Mark Daryl com pletely cover Falcons wings 1 5-oz per sq yd Ed glass cloth use arrow-shaft hinges brings weight up 74 ounces can add up 25 lb lead move CG back 3/ ina condition Mark says itll really smoke Mark also said Michael Selig himself called order Falcon kit Mark asked Michael based recently completed Princeton wind tunnel tests would want different airfoils plane standard S-3021/3014 com bination Michael said No Sounds good enough mc Mark selling semikits consisting finished fiberglass fuselage fitted canopy foam cores full-size core beds plans about $115 complete kit adds balsa wing sheeting balsa sticks fiberglass cloth carbon fiber reinforcements wing hard ware sells $175 Both kits will cost few extra bucks shipping kit looks like itll build pretty fast especially wings vac mayor decals DECALS PRESSURE SENSITIVEWATER TRANSFER Over 750 Select *7 1/4 Scale18 Sheets * 60 Size38 Sheets * 40 Size38 Sheets * Propeller Decals . WT Only 6 Sheets3 sizes ea * Kill MerkingsWT Only6 Sheets * Nomenclature Markings 3 Sizes-12 Sheds Black White copy * Letters Numbers 1/4-3/8-I/2-5/8-3/4-7/512344-13116 10 colors See color chart * Flags. American United Kingdom Confederate * Stars 10 Colors 8 Sizes pias Sheet Assorted Sizes * Trim Sheets 4-3/4 26 10 Colors see color chart Authentic model insignias pressure sensitive %d r47e9 mater transfer 1/4 scale 40 end 60ckSS4decals size propeller decals World War II kill mark-major ings stars flags letters numbers trim sheets NORTHEAST SCREEN GRAPHICS 21 FISHER AVE. EAST LONGUEADOW MA 01028 TEL 413-525-4110 INJECTION MOLDED FUSELAGE WING STAB& FIN PREFORMED LANDING GEAR STEERABLE NOSE WHEEL NYLON MOTOR MOUNT& BEARING STEERING ARM HINGES PUSH RODS MISC HARDWARE VACUUM FORMED CLEAR CANOPY AND EXHAUST STACKS 3-4 CH WE INVITE DEALER INQUIRIES FOR INFORMATION CALL OR WRITE 0 7_ m C 0 E C E 2- C m C C I m m SUCKER-KIT.. $5995 VHS Show & Tell Video $3995 Add $400 shipping & handling Ml residents add 4% sales tax Send Si 00 SASE Icr product list Samples real wEd veneer skins Product List Includes flapless Arrow Shalt Hinges Carbon Tow Mylar Sheet High-Tech iems Dealer Inquires Welcome SEND CHECK DR MONEY ORDER TO PO Box 866 Lapeer Ml 48446 313 664-3330 October 1989 49 Another Great Twin AmDhlblan G & P SALES GRUMMAN ALBATROSS HU-16BCONSOLIDATED PBY-5A CATALINA 81 inch wing span e 810 sq inches 13 lbs 1 inchwingspannoo9sqincheaell lbs nTwin 40 2C engine size 5 FIberglass fuselage Foam Twin 30-40 engine size Fiberglass fuselage Vacuum wing stab cores Includes wood s Vac formedformed clear acatate cockpit blisters Vac formed cowls nacellesstyrene cowls end nacallas Preformed landing gear $25995 plus shipping tax applicableland operation Retractable wing floats Retractable landing gear ktt 85$23995 plus ahipping tax applicable 90 mInute VHS video buIldIng flyIng *246690 minute VHS video building flying .. *2488 G & P SALES 410 College Ave Angwin CA 94508 965-3866 SURE FLITE 40 Power 51 WINGSPAN AIRACOBRA SUPER FUN SCALE 40 SIZE WARBIRD FAST ASSEMBLY EASY TO FLY U SURE FLITE ENTERPRISES 23015 DEL LAGO DRIVE LAG UNAHILLS CA92553 714 855-4402 Composite Aircraft ENUn & Supply FAX 649780 TAIBI iCH3646___________3NCH3646 BALSA WOOD STICKS 1/16-INCH3645 1116111606 1/1603/3207 11161/80611 1/16o3/160913 1/161/41015 1/163/81317 1/1601/21620 1/163/42126 3/32-INCH3646 3/320 3/320811 3/3201/80913 3/3203/161015 3/32 o 1/41316 3/3203/61419 3/32 0 1/21621 3/32 0 3/42431 Double Balsa Wood Prrces Spruce Bauuaood OScirs 1/8e 1/80811 1/603/161115 1/801/41317 1/803/61621 1/80 1/21724 1/60 3/42533 3/1 6-INCH3648 3/16 03/161317 3/160 1/41419 3/16 o 3/81821 3/160 1/21825 3/160 3/42838 1/4-INCH3648 1/4 0 1/41621 1/403/81825 1/40 1/22129 1/403/43142 5/16-INCH3646 5/1605/162027 5/16 o 3/82230 5/16 o 1/22736 5/16 o 3/43952 3/6-INCH3646 3/8 0 3/82737 3/80 1/23041 3/8 o 3/44460 1/2-INCH3648 1/20 1/23749 1/203/45270 TRIANGULAR CUT BALSA 1/4 0 1/40 3624 3/803/803629 1/201/203837 3/403/403647 10103661 BALSA PLANKS 3/403038178 102036164 103036230 104036303 202036230 203038329 2u4o36464 303038490 304036680 BALSA SHEETS 1-INCH3648 1/180 12736 3/32 13040 1/8e13344 3/18013749 1/4014157 3/8 015372 1/2018588 2-INCH3648 1/32023040 1/16 023648 3/32 0 24154 1/8e24660 3/180 25472 1/4e26384 3/60277103 1/202113150 1/32034053 1/16034358 3/32 0 35270 1/80 36080 3/16 037295 1/4 o 384112 5/1803103134 3/903120180 1/203150200 4-INCH3648 1/32046587 1/180473101 3/320482109 1/80495126 3/1804114151 1/404131193 3/804182271 1/204219325 BIRCH PLY WOOD 1/840 120 12175 1/640 120 24350 1/64o 12 48700 1/840480482800 1/32o6u1252 1/32u120 10105 1/32 012o 24210 1/32012049420 1/160801252 1/160120 12105 1/16 0120 24210 1/16012048420 3/32u6o1291 3/330120 12183 3/32 012u 24328 3/32u12048852 1/8060 1289 1/80 120 12178 1/8 12 24356 1/8o12o48712 3/160601274 3/16 012o 12146 3/16012024293 3/18012048595 Superior Aircraft Materials 1/40801274 1/40120 12146 1/4 0120 24293 1/4 012048085 3/80 120 12150 3/8 0 12 0 24360 3/8 0 12 48720 1/20120 12202 1/2012024405 1/2012048808 LITE PLYWOOD 1/801201258 1/6 0 12 024112 1/6 0 12 048224 TAPERED TRAILING EDGE3646 1/8o 1/22230 3/16 0 3/42940 1/4 e 14255 5/180 14481 3/60 1/a5272 12020-G Centralia iian Gardens California 90716 865-3220 Handling Charge $5-OG $300 COD mum Order $2000 FOB Factory accept Personal Checks COD fornia Residents add 6% Sales Tax uum bagged Contact Mark Allen exact price deliv ery info Flite Lite Composites PO Box 1493 Windsor CA 95492 telephone 1-707/8383390 Oly 88 project Tom Rent treasurer newsletter editor Minnesota R/C Soaring Society sent interesting letter club recently designed alternate wing Airtronics Olympic 650 kit can tach existing 650 fuselages wing modern design combining Selig 3021 airfoil sheeted foam cores ailerons spoilers uses straight dihedral can built one-piece two-piece wing attaches top 650 fuselage elastic bands -MRCSS kitted over 25 wings November sold quickly within club $10 kit included cores plans sheeting control cables root ribs joiner rod/brass tubes control horns committee mem bers designed built wing under expert guidance Bob Scaly named plane Oly 88 year conceived Several Oly 88s have competed first few contests 89 season good results against Prodigies Sagitta 600s Gnomes project helped members experi ence modern composite construction techniques migration ailerons advancing effi cient airfoils very pleased re suits Unfortunately club wont manufac turing kits However article Oly 88 may submitted MA later year magazine buys plans would avail able through MA s Full-Size Plan service Well see Enclosed photo daughter Sharla age four years proudly holding Oly 88 opted use plug-in arrangement Oly 88 wing modified tail feathers match shape wing model has 72-in span 619 sq area weighs 35 oz flies great both Slope Thermaling Thanks very much story photo Tom excellent example club members can get together work project benefits everyone especially stepping up poly ships ailerons though MRCSS wont making wing kits perhaps Bob Sealy could convinced cut some cores Maybe Toms Oly 88 started life Oly 650 sure doesnt look like now Quite nice looker both daughter Sharla plane Another lesson Oly 88 project start something flies well make demon tweaks friend Randy Reynolds calls have good chance success Modelers temperament born tinkerers Id bet us has ever built kit exactly supposed con structed know can improve de sign Go aheadhave fun Thats what Soar ing hobby about Roke onboard ESYM Roland Kern maker Roke line beautiful Scale Sailpianes Germany has come out important item insurance plane As can see photo its little electronic gadget row 10 mini-LED lamps across top two left red next two yellow six right green wire up Roke Expanded Scale Volt Meter pig tail suit radio plug unused receiver servo socket Assuming fully charged battery pack turn receiver switch lamps will consecutively flash starting left set tle down green lamps right illuminated what reading green lamp farthest right indicates 51 volts next 50 volts etc Sometimes two adjacent lamps will indicating voltage tween two values Make sketch 10 lamps Count off tenths volt youll see leftmost green lamp indicates 46 volts low re ceiver pack can safely used two yellow lamps indicate 45 44 volts R L about lowest voltage will drive servos red lamps indicate 43 42 volts definitely crash time really neat thing about onboard ESVM reads actual voltage pack onHERES UNIQUE TIME PIECE THAT FEATURES FAMILIAR FACE THE ALTIMETER WALL CLOCK Perfect den office Quality quartz movement Full 1 year warranty Four other models available Horizon cIock DG clock VOR clock & Airspeed thermometer DEALER ENQUIRIES WELCOME SEND CHEQUE OR MONEY ORDER FOR $3996 UPS T& AIRUNE SUPPLY CO 98-116 PINELLAS BAYWAY TIERRA VERDE FLORIDA 33715 TO ORDER TOLL FREE 1-800-848-2739 FLORIDA RESIDENTS ADD 6% SALES TAX 50 Model Aviation Last Call Module 7SP ATRCS retro-fit program will end Iecember 311989 sure get conversion soon ATRCSTM Advanced Technology Radio Control System Converts Module 75P advanced computerized control system Stores four aircraft setups Includes seven different servo configurations Individual surface travel limits centering Single switch presets launch speed modes Full trailing edge control Enhanced mixing functions Crow landing capability User selectable cross trim capability Flap stick reversing Elevator camber VTR Automatic selection high ail rudder mixing launch landing modes Fully installed kit year limited warranty Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 Airtroni~ Module 75P registered trademarks Airtroni Inc der actual loads say turn re ceiver switch 50-volt lamp lights up indicates voltage fully charged pack under minimal load ie receiver servos idling Current draw may 50 100 mA depending type re cetver Now turn transmitter stir sticks around servos may drawing high peak amperage total actual load pack could up around /2 1 ampere load voltage will drop two three tenths volt can actually see whats happening lighting up lamps lefi indicating 50 volts stop moving sticks 50-volt lamp should come back worst things can happen Glider have bad servo binding con trol surface puts too great load servo Either case results excessive current draw can quickly run down pack can get indication problem like ing far down green lamps light up work transmitter sticks Itll take some experience Roke ESVM before feel confident about lamp lit versus ining flying time Re member four-cell Ni-Cd receiver packs have relatively flat discharge curve down 44 volts Below curve falls off shelf Probably short flight should attempted voltage down 47-volt lamp can get Roke ESVM Roke im porter Tony Arnoux Imports Inc 1744 NW 82nd Ave Miami FL 33126 price $25 postpaid people flying Scale planes costing $1000 extra $25 certainly worth peace mind Come think plane doesnt have cost much make onboard ESVM worth correspond Tony might want ask him about Wik Rowing other German Scale ships now bringing Sportsman F3B update As youve probably heard quite few us sportsman fliers very excited about trying new eventwhich might better called Sportsman Multi-Task Soar ing SMTNo SMUT idea fly simplified Duration Distance Speed tasks similar F3B big using Sailplanes considerably tamer real F3B planes fliers have indicated desire partici pate contests bit challenging straight Thermal Duration strict F3B rules What talking about mid dleground Soaring Randy Reynolds dis cussed February column Take another look dont remember Sailplaners Ive talked about SMT just about have strong reactionsboth pro conbut mostly very positive makes think may something good Jim Gray publisher R/C Soaring Digest took bull horns said OK lets have RCSD Challenge Design Competition select example competitive Sportsman Multi-Task Glider lets recommend rules planes contest tasks clubs around country can run more-or-less similar SMT events Challenge Rules commit tee turned out Jim John Dvorak Don Edberg Gus Peleuses Randy Reynolds self vote rules planes tasks completed June RCSD Challenge win ning plane selected July Ill have give outcome next month since Im writing June what committee voted recom mend SMT rules PlanesOnly rule 75-oz maximum total weight including ballast As long planes weight below 75 oz anything else OK No restrictions span wing loading kit cost con struction materials controls radios original de signs builder model etc Tasks Duration using Percentage Slot system same new F3J International Thermal Dura tion task F3B landing tape recommended Dis tance using AMA Distance Task T7 per rule book page 93 Speed using AMA Speed Task T8 per rule book page 93 safety lineexcept recommend flier get two tries back-to-back better time counted Continued page 149 AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 Z ber 1989 51 1ursu 1i iou 1111 mrii A SHEETS 36 45 30 1 162 33 3322 40 162 43 3162 49 14 2 56 1 323 37 1 203 37 1 163 32 49 31 3323 44 56 37 18 3 54 71 46 3163 62 62 55 143 73 95 61 5163 85110 36 3 66124 71 123110155 34 3165191 1164 56 7646 3324 20 84 56 16 4 6010666 3164 93122 75 14 411013464 36 4165220139 2 4225261 MATCHED SHEETS 42 3324100 154106 3164120 144131 BALSA STICKS 3648 1161409 1163610 161214 332 1410 332 3812 332 1216 18 1606 16141116 18 361216 16 121024 3163161116 316 361720 316 122230 14 141624 14 391926 4122130 14343444 14 14055 5165162126 36 362737 39 123246 36 344255 36 15270 12123653 12344062 12 15876 56 584665 34 346790 * LIGHT46 LB BALSA TRIANGLES36 WOOD36 25353 68300353 356353 45363 558 3 669 BALSA PLANKS364 304 65822 5056 00242 14z6013335 1123275116463 11243603324100 22225164115 233253164133 24435144156 33495364236 34666124322 TAPERED SHEETS36 14265 14365 36266 36396 123120 LONE STAREPOXY SoLol695 696 10,598 30o,o596 TRAILING EDGE 36 14132 S161 1439 3611246 122~70 INSTANT GLUE 1 0 Thck 296 1 0 Tloo 296 2, TSck 550 2o 15n 550 must try 4-6 lb balsa BASSWOOD48 31631626 3161435 31631636 3161246 3163465 11411442 1431649 143460 36 3660 361270 3163490 121290 1234100 BUNDLE DEALS 301116336699 201164361035 20332 60 15332436955 1516336735 10116436695 16316336920 153164 36635 1014 336655 10-14436930 1036336670 53164 5 512336540 61124361060 15332446665 616446500 6316446600 614446645 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 116 1161725 16 142026 16 382232 3163162636 114 143450 14 364055 1141124565 316s 364966 36 126077 12 1126666 1125347567 SPRUCE TRIANGLES 316 316 1212 34 IStS175 1I8x12350 ______________ __________________ 114s6 275 LONE STAR MODELS 1623 57th Se Lubbock TX 79412 Cant 48 Handling Charge pay UPS Add $300 COD $400 extra PP APO FPO Stases accept Vise MasterCard personal checks COD 6/ % tax Texas US currency Minimum Wood Order $1000 SAm53 HARD MAPLE 1 4 36 3636 36 1 2 3l6 34 1234 18 40 46 50 66 66 BIRCH DOWELS36 16 39 31611 1414 51625 3832 3PLYBIRCII 48 1164x12835 1132x12475 1116x12475 1I8x12495 RC Soaring/Blakeslee Continued page 51 Note tasks use working prep aration time CD assembles flight group everybody ready says Go No relaunches allowed except case winch organizer timer flagger failure An ideal SMT contest would have equal num bers of three tasks CDs en couraged mix-n-match listed tasks wish use other tasks option exam ple contest could three rounds Duration two Distanceor combination tasks task normalized 1000 points contest points simply sum task points Duration Distance flown man-on-man except contest too small fewer say nine entrants mix up flight groups Club winches can used should about equal power contestants own winch can used available about same power other winches Ballast can added removed time long total weight does exceed 75 oz As hero Al Doig would say Howzat realize number folks out readerland responding Terrific may vast Its fact bulk Glider guiders US sport flying Gentle Ladys Oly tls such smaller group Sailplaners enjoy contest flying maybe quar ter half will actually give SMT try Perhaps SMT will go way F3B ie enough fliers get interested develop necessary critical mass start chain reaction However Im hoping SMT will have broader appeal because its much easier Sportsman-level fliers get simpler clubs run Itll take few promoters club get ball rolling Once people find out exciting much fun Distance Speed tasks fly SMT could really take off As MA Soaring correspondent feel duty point out kicks satisfaction can experience moving up caliber planes Taking analogy full-size Soaring its similar advancing primary trainer like Schweizer 2-22 intermediate ship such Schweizer 1-35 finally glass racing beauty like Schempp-Hirth Discus 2-22 pi lot perfectly happy just being up air once tries l-35 knows hes faster responsive ship Its higher performance pro vides Soaring enjoyment Discus other step up ladder imagine its tough go back once youve flown Same thing models myself Im very excited about possibil ities Sportsman Multi-Task 75-oz rule easy fliers understand easy CDs administer specifically chosen keep planes being intimidating Sportsmanlevel pilots Lots good kit designs fill bill design own Pilots can get started what theyve got because just about Standard Class planes weight under 75 oz Planes will course vary sophistication pilot does well SMT will knows plane practices lot Also hop ing come up easy system placing SMT pilots Novice Intermediate Ex pert classes beginners will feel less trepi dation about flying experienced guys Contests dont have contests Clubs can schedule SMT Sessions just run Distance Speed tasks guarantee practic ing tasks will improve flying skills theyre fun boot Ill bet once 3U ex perience thrill racing neck-and-neck Distance task youll decide need faster plane Please let know what think magical design programs fol lowing letter John Hohensee pretty much clears up controversy over Johns com puter design program MaxSoar Its also very structive what MaxSoar Lee Murrays PC-Soar about John also wants let know new address S22 W27400 Fen way Drive Waukesha WI 53l88 telephone 4l4/52l-2472 Jeff Raskin correct says pro grams magical However think boo-boo can attributed excitenlent see ing useful new technology being made available modelers just got back National Computer Graphics Association convention sessions speaker showed slide think applies read Corollary Murphys Law Any sufficiently advanced technology indistinguishable magic Just MaxSoar PC-Soar magic neither programs used NASA McDonnell-Douglas Boeing pro grams approximate aircraft performance un der certain conditions reasons aircraft still test flown realize programs iii same class n3odelers have access Cray superconiputer Lee Continued page 152 October 1989 149 WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance BALSA HOT LINE Call fSOAf 745 6394 10 am6 pm Central Time SFLYEIACH 48 3I32x12700 118s12775 363116x12625 471l4x12625 643/8x12725 61112x12900 LITEPLY48 GROOVED LGMOUNTS 12 Inch 36341840 36 34632140 123431646 WOULD YOU SAW HOLE IN THIS FUSELAGE Der Svitch direct replacement on-board on/off switch radio equipment hides inside fuselage activated outside included bar magnet vibration proof reliable submers ible consumes no power easy use install Ideal scale sport float planes boats sail planes helicopters Dont ugly up fuselage Der Svitch TO BATTERY DERSVITCHBAR MAGNET CHARO NC JACK ECEIVER P00 Peo two basic models Model 1401 comes connectors use old ones $1995 Model 1402 comes connectors Futaba J G Airtronics $2995 Both models include installation instructions bar magnet Optionally available Model 1405 LED $895 red LED lamp 20 leads indicates radio state can installed instrument panel realistic effect Order Include name address specify models needed include check money order send Ragan/Barker Group 5050 Quorum Drive #741 Dallas TX 75240 Please add $250 perorderto cover UPS charges &TX residents add sales tax credit card orders call between 900 500 central M-F Please allow 2-4 weeks delivery RC Soaring/Blakeslee Continued page 149 believe products provide useful tool Sailplane fliers What MaxSoar PC-Soar Based input 30 design measurements such wingspan chord airfoil etc programs cal culate following 23 aircraft design parameters Wing area equivalent dihedral aspcct ratio recommended dihedral average chord angle incidence aerodynamic center loading Horizontal tail area average chord aspect ra tio aerodynamic center longitudinal stability fac tor Vertical tail area average chord aspect ra tio aerodynamic center tail volume sideslip stability factor Miscellaneous forward CG limit rear CG limit aircraft neutral point online help MaxSoar provides ranges average values calculated values way added Jeffs urg ing earlier letter Its thing able calculate sideslip instability factor its another have guide what should table flight speed Reynolds number tal aircraft drag coefficient sink rate lift-todrag ratio about 10 coefficient lift values generated about 50 num bers table calculating involves hundreds calculations Generating table re quires accessing data file 40 50 numbers representing performance polar airfoil being considered Incidentally currently pro vide about 70 airfoil polar data files adding data become available programs plot values can quickly understood designer MaxSoar PC-Soar allow designer overlay several aircraft polars com parison makes simple observe ef fects design changes compare different de signs see effect ballasting design course can output printer documenting design process discussing others Lee did just dream calcula tions upwe simply automated equa tions available modelers because peo ple like Martin Simons Lynn Cromer Ren Van Putte Alex Strojnik Michael Selig Blame Beron-Rawdon others published books articles aerodynamics mod els Are works last word model de sign Absolutely provide excel lent start would like address Jeffs specific com plaints mentions changing dihedral angle 200 sweeping wing 300 perform ance polars changing correct made conscious decision during writing programs disregard reduction projected area due dihedral decision based fact reduction lifting sur face 15 percent 100 dihedral average dihedral rudder-controlled Glider area reduction aileron ship 30 dihedral less 015 percent ab surd 200 dihedral reduces area 60 per cent program does calculate outlined several recent articles MA equivalent dihe dral angle based dihedral information pro vided designer equations programs indi cate effect performance due wing sweep unless affects area wingspan chord maintained wing swept area remains constant does affect perform ance according equations used would effects local angle attack various wing sections due circulation ef fects other sections what magni tude effects might dont know Jeff knows Lee would interested hear ing Jeff did mention wing sweep well horizontal vertical tail sweep correctly taken account calculation aerody namic centers neutral point tail volume etc Jeff mentions individual building up whole folders design comparisons states evaluations meaningless individ ual beta tester MaxSoar program has flown Gliders 20 years has achieved LSF Level IV needs eight-hour Slope flight Level V has participated local regional contests Great Race LSF Nats has also flown F3B quarter-final level has spent last 10 years studying model aerodynamics compiling de tailed design information has performed field tests effects ballast sink rate flying speed gracious enough let Lee use notebook design information provided airfoil polar data use libraries Since calculating virtually same parameters MaxSoar provided good check code compiling design information hand took about 10 hours per model did calculate performance polars Much time spent checking math mistakes computers dont make Now MaxSoar takes about 30 minutes including performance polars Since has flown designs documented believe him says MaxSoars calculated performance corre lates well flight experience Gliders performed relative another crux issue designer needs basis comparing design versus another believe programs provide basis As can see times mentioned above programs provide 20-to- 1 reduction time required calculate simple design pa rameters let alone performance data takes about five months build Glider few hours front computer can keep building Glider going perform expectations consider time well spent thanks John Hohensee taking time write above letter New Soaring club George Voss wrote let us know Oklahoma City Silent Fliers club now operation Sailplaners Okie City area can get information George 1403 Lincolnshire Road Oklahoma City OK 73159 telephone 1-405/793-9213 RC Aerobatics/Van Putte Continued page 53 nation can deviate normal still able score Hanno makes style rather following hes World Champion STYLE PREFERENCE isnt exactly same what Ive talking about Im talk ing about guy wants see pattern flown particular way other styles will appreciated Everyone like some degree some us very bad about know local judge likes low fast Thats worth extra point maneuver isnt fair either its human nature very difficult counter try let affect score 152 Model Aviation Introducing Invisible SvitchTM Made USA
Edition: Model Aviation - 1989/10
Page Numbers: 48, 49, 50, 51, 149, 152
EXCITEMENT California being caused flying season Mark Allens new Falcon 880 de sign ship spans 112 has beautifully made Kevlar-reinforced fiberglass fuselage Se hg 3021 airfoil ailerons/flaps balsa-sheeted foam core wings modified Schuemann planform distinctive feature upswept wing tips outer 10 all-flying stab rudder built-up balsa construction Four servos wings ailerons flaps making computer radios like Airtronics Vision easiest way go Visions threeposition Launch/Cruise/Speed switch permits pre setting entire trailing edge three modes crow landing configuration flaps down 900 ailerons up 250 makes hitting spot much consistent regular fourchannel radio using Y connectors would fly Falcon youd give up nice mixing preset functions Falcon does incorporate thing overly unusual days However Mark seems have brought off perfect com bination model Sailplane design elements does Falcon look right its early com petition record quality workmanship kit making very hot ticket fact Marks problem has keeping up de mand asked Mark hed give us quick rundown what thinking about designed Falcon what said Falcon 880 designed give Thermal Duration pilot highest possible per formance versatility being difficult fly designed clean sheet paper New technology form Selig computerdesigned wind-tunnel-tested airfoils Schue mann wing planform theory F3B competition ex perience computer radio flexibility used achieve design goals Falcon Airfoils combination Selig 3021 3014 used because good lifting capa bilities thermaling speeds very low drag high speeds S-30 14 used tip elim inate tip stalling can problem swept-back tips Wing planform Wing vortex drag 50% total Sailplane drag thermaling speed Schuemann wing planform dramatically reduces drag thereby increasing L/D reducing sink rate better Thermal performance Upswept tips increase stability maximize Schuemann wing planform efficiency com petitors after seeing well Falcon flies have put type tip planes re port increase performance sta ble easier fly Sailplane am very interested continuing development tips would welcome comments persons have tried planes Overall size Much time spent computer determine optimum wingspan aspect ratio things such aspect ra tio vs Reynolds number wing strength over handling characteristics carefully ana lyzed result 112-in span 1425 pect ratio slightly smaller cur rent breed Unlimited Class Sailplanes fers advantages biggest advantages launching landing Most club winches used contests somewhat limited power line speed its smaller size overall low drag Falcon well matched winches can instantly accelerate top launch spectacular zoom Crisp aileron control stow speed big 9fl0 flaps opti mum size give Falcon unmatched landing ac curacy needed winning contests Drag Low overall drag achieved com bining very low-drag fuselage low-drag air foils gives Falcon 880 best L/D penetration Sailplane manufactured US Summary Falcon 880 offers competi tion highest performance versatility yet very easy forgiving fly Its low drag enables Falcon outlaunch outdistance competition searching lift Once lift 48 Model Aviation Radio Conoi Soaring Byron Blakeslee 3134 N Wlnnebago Dr Sedalla CO 80135 Flite Line Composites new Falcon 880 has phenomenal contest record California Wingspan 112 Byron has lot say about Glider months columnn Wing has upswept tips flaps ailerons Fuselage Keviar-reinforced fiberglass Photo below shows plane crow configuration fast descent flaps down 90 ailerons up about 250 Tom Rents daughter Sharla looks mighty happy hold dads modified Olympic 88 new wing designed built 25 MRCSS members used primarily high-tech replacement Olympic 650 Rake on-board ESYM expanded-scale voltmeter row 10 LEDs top th@ circuIt board light up sequence tell state charge receivers NiCd battery pack info column fpund thermals best As mentioned above Falcon very impressive contest record first half 89 Among notable showings wins Bob McGowan both Western States Cham pionships Modesto LSF/SBSS Nation als Morgan Hill CA second sixth NSS/TOSS Masters Contest Fred Weaver Bob McGowan first Hans Weiss Memorial Slope Race Daryl Perkins first third 60-plus-contestant North Coast Soaring League/SBSS March contest Bob Mark Personally Im very anxious try Falcon because looks like ideal ship new Sportsman Multi-Task SMT event fact entry RCSD Challenge rule SMT planes full details discussed minute weight limit 75 ounces stock Falcon weighs 60 65 oz giving about lO-oz/sq-ft wing loading could add 10-15 oz ballast Speed task mak ing loading respectable 123 oz/sq ft legal weight Going contest results Falcon able compete nicely Duration big boys Lovesongs Meteors etc So youd expect Falcon capable doing well threetask Duration Speed Distance SMT events very encouraging because think 112in-span plane makes handy size all-around Glider Its big enough perform well small enough too much handful espe cially windy weather Itll go up easily hi start fun flying also power-zoom off winches contests strictly Slope flying Mark Daryl com pletely cover Falcons wings 1 5-oz per sq yd Ed glass cloth use arrow-shaft hinges brings weight up 74 ounces can add up 25 lb lead move CG back 3/ ina condition Mark says itll really smoke Mark also said Michael Selig himself called order Falcon kit Mark asked Michael based recently completed Princeton wind tunnel tests would want different airfoils plane standard S-3021/3014 com bination Michael said No Sounds good enough mc Mark selling semikits consisting finished fiberglass fuselage fitted canopy foam cores full-size core beds plans about $115 complete kit adds balsa wing sheeting balsa sticks fiberglass cloth carbon fiber reinforcements wing hard ware sells $175 Both kits will cost few extra bucks shipping kit looks like itll build pretty fast especially wings vac mayor decals DECALS PRESSURE SENSITIVEWATER TRANSFER Over 750 Select *7 1/4 Scale18 Sheets * 60 Size38 Sheets * 40 Size38 Sheets * Propeller Decals . WT Only 6 Sheets3 sizes ea * Kill MerkingsWT Only6 Sheets * Nomenclature Markings 3 Sizes-12 Sheds Black White copy * Letters Numbers 1/4-3/8-I/2-5/8-3/4-7/512344-13116 10 colors See color chart * Flags. American United Kingdom Confederate * Stars 10 Colors 8 Sizes pias Sheet Assorted Sizes * Trim Sheets 4-3/4 26 10 Colors see color chart Authentic model insignias pressure sensitive %d r47e9 mater transfer 1/4 scale 40 end 60ckSS4decals size propeller decals World War II kill mark-major ings stars flags letters numbers trim sheets NORTHEAST SCREEN GRAPHICS 21 FISHER AVE. EAST LONGUEADOW MA 01028 TEL 413-525-4110 INJECTION MOLDED FUSELAGE WING STAB& FIN PREFORMED LANDING GEAR STEERABLE NOSE WHEEL NYLON MOTOR MOUNT& BEARING STEERING ARM HINGES PUSH RODS MISC HARDWARE VACUUM FORMED CLEAR CANOPY AND EXHAUST STACKS 3-4 CH WE INVITE DEALER INQUIRIES FOR INFORMATION CALL OR WRITE 0 7_ m C 0 E C E 2- C m C C I m m SUCKER-KIT.. $5995 VHS Show & Tell Video $3995 Add $400 shipping & handling Ml residents add 4% sales tax Send Si 00 SASE Icr product list Samples real wEd veneer skins Product List Includes flapless Arrow Shalt Hinges Carbon Tow Mylar Sheet High-Tech iems Dealer Inquires Welcome SEND CHECK DR MONEY ORDER TO PO Box 866 Lapeer Ml 48446 313 664-3330 October 1989 49 Another Great Twin AmDhlblan G & P SALES GRUMMAN ALBATROSS HU-16BCONSOLIDATED PBY-5A CATALINA 81 inch wing span e 810 sq inches 13 lbs 1 inchwingspannoo9sqincheaell lbs nTwin 40 2C engine size 5 FIberglass fuselage Foam Twin 30-40 engine size Fiberglass fuselage Vacuum wing stab cores Includes wood s Vac formedformed clear acatate cockpit blisters Vac formed cowls nacellesstyrene cowls end nacallas Preformed landing gear $25995 plus shipping tax applicableland operation Retractable wing floats Retractable landing gear ktt 85$23995 plus ahipping tax applicable 90 mInute VHS video buIldIng flyIng *246690 minute VHS video building flying .. *2488 G & P SALES 410 College Ave Angwin CA 94508 965-3866 SURE FLITE 40 Power 51 WINGSPAN AIRACOBRA SUPER FUN SCALE 40 SIZE WARBIRD FAST ASSEMBLY EASY TO FLY U SURE FLITE ENTERPRISES 23015 DEL LAGO DRIVE LAG UNAHILLS CA92553 714 855-4402 Composite Aircraft ENUn & Supply FAX 649780 TAIBI iCH3646___________3NCH3646 BALSA WOOD STICKS 1/16-INCH3645 1116111606 1/1603/3207 11161/80611 1/16o3/160913 1/161/41015 1/163/81317 1/1601/21620 1/163/42126 3/32-INCH3646 3/320 3/320811 3/3201/80913 3/3203/161015 3/32 o 1/41316 3/3203/61419 3/32 0 1/21621 3/32 0 3/42431 Double Balsa Wood Prrces Spruce Bauuaood OScirs 1/8e 1/80811 1/603/161115 1/801/41317 1/803/61621 1/80 1/21724 1/60 3/42533 3/1 6-INCH3648 3/16 03/161317 3/160 1/41419 3/16 o 3/81821 3/160 1/21825 3/160 3/42838 1/4-INCH3648 1/4 0 1/41621 1/403/81825 1/40 1/22129 1/403/43142 5/16-INCH3646 5/1605/162027 5/16 o 3/82230 5/16 o 1/22736 5/16 o 3/43952 3/6-INCH3646 3/8 0 3/82737 3/80 1/23041 3/8 o 3/44460 1/2-INCH3648 1/20 1/23749 1/203/45270 TRIANGULAR CUT BALSA 1/4 0 1/40 3624 3/803/803629 1/201/203837 3/403/403647 10103661 BALSA PLANKS 3/403038178 102036164 103036230 104036303 202036230 203038329 2u4o36464 303038490 304036680 BALSA SHEETS 1-INCH3648 1/180 12736 3/32 13040 1/8e13344 3/18013749 1/4014157 3/8 015372 1/2018588 2-INCH3648 1/32023040 1/16 023648 3/32 0 24154 1/8e24660 3/180 25472 1/4e26384 3/60277103 1/202113150 1/32034053 1/16034358 3/32 0 35270 1/80 36080 3/16 037295 1/4 o 384112 5/1803103134 3/903120180 1/203150200 4-INCH3648 1/32046587 1/180473101 3/320482109 1/80495126 3/1804114151 1/404131193 3/804182271 1/204219325 BIRCH PLY WOOD 1/840 120 12175 1/640 120 24350 1/64o 12 48700 1/840480482800 1/32o6u1252 1/32u120 10105 1/32 012o 24210 1/32012049420 1/160801252 1/160120 12105 1/16 0120 24210 1/16012048420 3/32u6o1291 3/330120 12183 3/32 012u 24328 3/32u12048852 1/8060 1289 1/80 120 12178 1/8 12 24356 1/8o12o48712 3/160601274 3/16 012o 12146 3/16012024293 3/18012048595 Superior Aircraft Materials 1/40801274 1/40120 12146 1/4 0120 24293 1/4 012048085 3/80 120 12150 3/8 0 12 0 24360 3/8 0 12 48720 1/20120 12202 1/2012024405 1/2012048808 LITE PLYWOOD 1/801201258 1/6 0 12 024112 1/6 0 12 048224 TAPERED TRAILING EDGE3646 1/8o 1/22230 3/16 0 3/42940 1/4 e 14255 5/180 14481 3/60 1/a5272 12020-G Centralia iian Gardens California 90716 865-3220 Handling Charge $5-OG $300 COD mum Order $2000 FOB Factory accept Personal Checks COD fornia Residents add 6% Sales Tax uum bagged Contact Mark Allen exact price deliv ery info Flite Lite Composites PO Box 1493 Windsor CA 95492 telephone 1-707/8383390 Oly 88 project Tom Rent treasurer newsletter editor Minnesota R/C Soaring Society sent interesting letter club recently designed alternate wing Airtronics Olympic 650 kit can tach existing 650 fuselages wing modern design combining Selig 3021 airfoil sheeted foam cores ailerons spoilers uses straight dihedral can built one-piece two-piece wing attaches top 650 fuselage elastic bands -MRCSS kitted over 25 wings November sold quickly within club $10 kit included cores plans sheeting control cables root ribs joiner rod/brass tubes control horns committee mem bers designed built wing under expert guidance Bob Scaly named plane Oly 88 year conceived Several Oly 88s have competed first few contests 89 season good results against Prodigies Sagitta 600s Gnomes project helped members experi ence modern composite construction techniques migration ailerons advancing effi cient airfoils very pleased re suits Unfortunately club wont manufac turing kits However article Oly 88 may submitted MA later year magazine buys plans would avail able through MA s Full-Size Plan service Well see Enclosed photo daughter Sharla age four years proudly holding Oly 88 opted use plug-in arrangement Oly 88 wing modified tail feathers match shape wing model has 72-in span 619 sq area weighs 35 oz flies great both Slope Thermaling Thanks very much story photo Tom excellent example club members can get together work project benefits everyone especially stepping up poly ships ailerons though MRCSS wont making wing kits perhaps Bob Sealy could convinced cut some cores Maybe Toms Oly 88 started life Oly 650 sure doesnt look like now Quite nice looker both daughter Sharla plane Another lesson Oly 88 project start something flies well make demon tweaks friend Randy Reynolds calls have good chance success Modelers temperament born tinkerers Id bet us has ever built kit exactly supposed con structed know can improve de sign Go aheadhave fun Thats what Soar ing hobby about Roke onboard ESYM Roland Kern maker Roke line beautiful Scale Sailpianes Germany has come out important item insurance plane As can see photo its little electronic gadget row 10 mini-LED lamps across top two left red next two yellow six right green wire up Roke Expanded Scale Volt Meter pig tail suit radio plug unused receiver servo socket Assuming fully charged battery pack turn receiver switch lamps will consecutively flash starting left set tle down green lamps right illuminated what reading green lamp farthest right indicates 51 volts next 50 volts etc Sometimes two adjacent lamps will indicating voltage tween two values Make sketch 10 lamps Count off tenths volt youll see leftmost green lamp indicates 46 volts low re ceiver pack can safely used two yellow lamps indicate 45 44 volts R L about lowest voltage will drive servos red lamps indicate 43 42 volts definitely crash time really neat thing about onboard ESVM reads actual voltage pack onHERES UNIQUE TIME PIECE THAT FEATURES FAMILIAR FACE THE ALTIMETER WALL CLOCK Perfect den office Quality quartz movement Full 1 year warranty Four other models available Horizon cIock DG clock VOR clock & Airspeed thermometer DEALER ENQUIRIES WELCOME SEND CHEQUE OR MONEY ORDER FOR $3996 UPS T& AIRUNE SUPPLY CO 98-116 PINELLAS BAYWAY TIERRA VERDE FLORIDA 33715 TO ORDER TOLL FREE 1-800-848-2739 FLORIDA RESIDENTS ADD 6% SALES TAX 50 Model Aviation Last Call Module 7SP ATRCS retro-fit program will end Iecember 311989 sure get conversion soon ATRCSTM Advanced Technology Radio Control System Converts Module 75P advanced computerized control system Stores four aircraft setups Includes seven different servo configurations Individual surface travel limits centering Single switch presets launch speed modes Full trailing edge control Enhanced mixing functions Crow landing capability User selectable cross trim capability Flap stick reversing Elevator camber VTR Automatic selection high ail rudder mixing launch landing modes Fully installed kit year limited warranty Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 Airtroni~ Module 75P registered trademarks Airtroni Inc der actual loads say turn re ceiver switch 50-volt lamp lights up indicates voltage fully charged pack under minimal load ie receiver servos idling Current draw may 50 100 mA depending type re cetver Now turn transmitter stir sticks around servos may drawing high peak amperage total actual load pack could up around /2 1 ampere load voltage will drop two three tenths volt can actually see whats happening lighting up lamps lefi indicating 50 volts stop moving sticks 50-volt lamp should come back worst things can happen Glider have bad servo binding con trol surface puts too great load servo Either case results excessive current draw can quickly run down pack can get indication problem like ing far down green lamps light up work transmitter sticks Itll take some experience Roke ESVM before feel confident about lamp lit versus ining flying time Re member four-cell Ni-Cd receiver packs have relatively flat discharge curve down 44 volts Below curve falls off shelf Probably short flight should attempted voltage down 47-volt lamp can get Roke ESVM Roke im porter Tony Arnoux Imports Inc 1744 NW 82nd Ave Miami FL 33126 price $25 postpaid people flying Scale planes costing $1000 extra $25 certainly worth peace mind Come think plane doesnt have cost much make onboard ESVM worth correspond Tony might want ask him about Wik Rowing other German Scale ships now bringing Sportsman F3B update As youve probably heard quite few us sportsman fliers very excited about trying new eventwhich might better called Sportsman Multi-Task Soar ing SMTNo SMUT idea fly simplified Duration Distance Speed tasks similar F3B big using Sailplanes considerably tamer real F3B planes fliers have indicated desire partici pate contests bit challenging straight Thermal Duration strict F3B rules What talking about mid dleground Soaring Randy Reynolds dis cussed February column Take another look dont remember Sailplaners Ive talked about SMT just about have strong reactionsboth pro conbut mostly very positive makes think may something good Jim Gray publisher R/C Soaring Digest took bull horns said OK lets have RCSD Challenge Design Competition select example competitive Sportsman Multi-Task Glider lets recommend rules planes contest tasks clubs around country can run more-or-less similar SMT events Challenge Rules commit tee turned out Jim John Dvorak Don Edberg Gus Peleuses Randy Reynolds self vote rules planes tasks completed June RCSD Challenge win ning plane selected July Ill have give outcome next month since Im writing June what committee voted recom mend SMT rules PlanesOnly rule 75-oz maximum total weight including ballast As long planes weight below 75 oz anything else OK No restrictions span wing loading kit cost con struction materials controls radios original de signs builder model etc Tasks Duration using Percentage Slot system same new F3J International Thermal Dura tion task F3B landing tape recommended Dis tance using AMA Distance Task T7 per rule book page 93 Speed using AMA Speed Task T8 per rule book page 93 safety lineexcept recommend flier get two tries back-to-back better time counted Continued page 149 AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 Z ber 1989 51 1ursu 1i iou 1111 mrii A SHEETS 36 45 30 1 162 33 3322 40 162 43 3162 49 14 2 56 1 323 37 1 203 37 1 163 32 49 31 3323 44 56 37 18 3 54 71 46 3163 62 62 55 143 73 95 61 5163 85110 36 3 66124 71 123110155 34 3165191 1164 56 7646 3324 20 84 56 16 4 6010666 3164 93122 75 14 411013464 36 4165220139 2 4225261 MATCHED SHEETS 42 3324100 154106 3164120 144131 BALSA STICKS 3648 1161409 1163610 161214 332 1410 332 3812 332 1216 18 1606 16141116 18 361216 16 121024 3163161116 316 361720 316 122230 14 141624 14 391926 4122130 14343444 14 14055 5165162126 36 362737 39 123246 36 344255 36 15270 12123653 12344062 12 15876 56 584665 34 346790 * LIGHT46 LB BALSA TRIANGLES36 WOOD36 25353 68300353 356353 45363 558 3 669 BALSA PLANKS364 304 65822 5056 00242 14z6013335 1123275116463 11243603324100 22225164115 233253164133 24435144156 33495364236 34666124322 TAPERED SHEETS36 14265 14365 36266 36396 123120 LONE STAREPOXY SoLol695 696 10,598 30o,o596 TRAILING EDGE 36 14132 S161 1439 3611246 122~70 INSTANT GLUE 1 0 Thck 296 1 0 Tloo 296 2, TSck 550 2o 15n 550 must try 4-6 lb balsa BASSWOOD48 31631626 3161435 31631636 3161246 3163465 11411442 1431649 143460 36 3660 361270 3163490 121290 1234100 BUNDLE DEALS 301116336699 201164361035 20332 60 15332436955 1516336735 10116436695 16316336920 153164 36635 1014 336655 10-14436930 1036336670 53164 5 512336540 61124361060 15332446665 616446500 6316446600 614446645 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 116 1161725 16 142026 16 382232 3163162636 114 143450 14 364055 1141124565 316s 364966 36 126077 12 1126666 1125347567 SPRUCE TRIANGLES 316 316 1212 34 IStS175 1I8x12350 ______________ __________________ 114s6 275 LONE STAR MODELS 1623 57th Se Lubbock TX 79412 Cant 48 Handling Charge pay UPS Add $300 COD $400 extra PP APO FPO Stases accept Vise MasterCard personal checks COD 6/ % tax Texas US currency Minimum Wood Order $1000 SAm53 HARD MAPLE 1 4 36 3636 36 1 2 3l6 34 1234 18 40 46 50 66 66 BIRCH DOWELS36 16 39 31611 1414 51625 3832 3PLYBIRCII 48 1164x12835 1132x12475 1116x12475 1I8x12495 RC Soaring/Blakeslee Continued page 51 Note tasks use working prep aration time CD assembles flight group everybody ready says Go No relaunches allowed except case winch organizer timer flagger failure An ideal SMT contest would have equal num bers of three tasks CDs en couraged mix-n-match listed tasks wish use other tasks option exam ple contest could three rounds Duration two Distanceor combination tasks task normalized 1000 points contest points simply sum task points Duration Distance flown man-on-man except contest too small fewer say nine entrants mix up flight groups Club winches can used should about equal power contestants own winch can used available about same power other winches Ballast can added removed time long total weight does exceed 75 oz As hero Al Doig would say Howzat realize number folks out readerland responding Terrific may vast Its fact bulk Glider guiders US sport flying Gentle Ladys Oly tls such smaller group Sailplaners enjoy contest flying maybe quar ter half will actually give SMT try Perhaps SMT will go way F3B ie enough fliers get interested develop necessary critical mass start chain reaction However Im hoping SMT will have broader appeal because its much easier Sportsman-level fliers get simpler clubs run Itll take few promoters club get ball rolling Once people find out exciting much fun Distance Speed tasks fly SMT could really take off As MA Soaring correspondent feel duty point out kicks satisfaction can experience moving up caliber planes Taking analogy full-size Soaring its similar advancing primary trainer like Schweizer 2-22 intermediate ship such Schweizer 1-35 finally glass racing beauty like Schempp-Hirth Discus 2-22 pi lot perfectly happy just being up air once tries l-35 knows hes faster responsive ship Its higher performance pro vides Soaring enjoyment Discus other step up ladder imagine its tough go back once youve flown Same thing models myself Im very excited about possibil ities Sportsman Multi-Task 75-oz rule easy fliers understand easy CDs administer specifically chosen keep planes being intimidating Sportsmanlevel pilots Lots good kit designs fill bill design own Pilots can get started what theyve got because just about Standard Class planes weight under 75 oz Planes will course vary sophistication pilot does well SMT will knows plane practices lot Also hop ing come up easy system placing SMT pilots Novice Intermediate Ex pert classes beginners will feel less trepi dation about flying experienced guys Contests dont have contests Clubs can schedule SMT Sessions just run Distance Speed tasks guarantee practic ing tasks will improve flying skills theyre fun boot Ill bet once 3U ex perience thrill racing neck-and-neck Distance task youll decide need faster plane Please let know what think magical design programs fol lowing letter John Hohensee pretty much clears up controversy over Johns com puter design program MaxSoar Its also very structive what MaxSoar Lee Murrays PC-Soar about John also wants let know new address S22 W27400 Fen way Drive Waukesha WI 53l88 telephone 4l4/52l-2472 Jeff Raskin correct says pro grams magical However think boo-boo can attributed excitenlent see ing useful new technology being made available modelers just got back National Computer Graphics Association convention sessions speaker showed slide think applies read Corollary Murphys Law Any sufficiently advanced technology indistinguishable magic Just MaxSoar PC-Soar magic neither programs used NASA McDonnell-Douglas Boeing pro grams approximate aircraft performance un der certain conditions reasons aircraft still test flown realize programs iii same class n3odelers have access Cray superconiputer Lee Continued page 152 October 1989 149 WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance BALSA HOT LINE Call fSOAf 745 6394 10 am6 pm Central Time SFLYEIACH 48 3I32x12700 118s12775 363116x12625 471l4x12625 643/8x12725 61112x12900 LITEPLY48 GROOVED LGMOUNTS 12 Inch 36341840 36 34632140 123431646 WOULD YOU SAW HOLE IN THIS FUSELAGE Der Svitch direct replacement on-board on/off switch radio equipment hides inside fuselage activated outside included bar magnet vibration proof reliable submers ible consumes no power easy use install Ideal scale sport float planes boats sail planes helicopters Dont ugly up fuselage Der Svitch TO BATTERY DERSVITCHBAR MAGNET CHARO NC JACK ECEIVER P00 Peo two basic models Model 1401 comes connectors use old ones $1995 Model 1402 comes connectors Futaba J G Airtronics $2995 Both models include installation instructions bar magnet Optionally available Model 1405 LED $895 red LED lamp 20 leads indicates radio state can installed instrument panel realistic effect Order Include name address specify models needed include check money order send Ragan/Barker Group 5050 Quorum Drive #741 Dallas TX 75240 Please add $250 perorderto cover UPS charges &TX residents add sales tax credit card orders call between 900 500 central M-F Please allow 2-4 weeks delivery RC Soaring/Blakeslee Continued page 149 believe products provide useful tool Sailplane fliers What MaxSoar PC-Soar Based input 30 design measurements such wingspan chord airfoil etc programs cal culate following 23 aircraft design parameters Wing area equivalent dihedral aspcct ratio recommended dihedral average chord angle incidence aerodynamic center loading Horizontal tail area average chord aspect ra tio aerodynamic center longitudinal stability fac tor Vertical tail area average chord aspect ra tio aerodynamic center tail volume sideslip stability factor Miscellaneous forward CG limit rear CG limit aircraft neutral point online help MaxSoar provides ranges average values calculated values way added Jeffs urg ing earlier letter Its thing able calculate sideslip instability factor its another have guide what should table flight speed Reynolds number tal aircraft drag coefficient sink rate lift-todrag ratio about 10 coefficient lift values generated about 50 num bers table calculating involves hundreds calculations Generating table re quires accessing data file 40 50 numbers representing performance polar airfoil being considered Incidentally currently pro vide about 70 airfoil polar data files adding data become available programs plot values can quickly understood designer MaxSoar PC-Soar allow designer overlay several aircraft polars com parison makes simple observe ef fects design changes compare different de signs see effect ballasting design course can output printer documenting design process discussing others Lee did just dream calcula tions upwe simply automated equa tions available modelers because peo ple like Martin Simons Lynn Cromer Ren Van Putte Alex Strojnik Michael Selig Blame Beron-Rawdon others published books articles aerodynamics mod els Are works last word model de sign Absolutely provide excel lent start would like address Jeffs specific com plaints mentions changing dihedral angle 200 sweeping wing 300 perform ance polars changing correct made conscious decision during writing programs disregard reduction projected area due dihedral decision based fact reduction lifting sur face 15 percent 100 dihedral average dihedral rudder-controlled Glider area reduction aileron ship 30 dihedral less 015 percent ab surd 200 dihedral reduces area 60 per cent program does calculate outlined several recent articles MA equivalent dihe dral angle based dihedral information pro vided designer equations programs indi cate effect performance due wing sweep unless affects area wingspan chord maintained wing swept area remains constant does affect perform ance according equations used would effects local angle attack various wing sections due circulation ef fects other sections what magni tude effects might dont know Jeff knows Lee would interested hear ing Jeff did mention wing sweep well horizontal vertical tail sweep correctly taken account calculation aerody namic centers neutral point tail volume etc Jeff mentions individual building up whole folders design comparisons states evaluations meaningless individ ual beta tester MaxSoar program has flown Gliders 20 years has achieved LSF Level IV needs eight-hour Slope flight Level V has participated local regional contests Great Race LSF Nats has also flown F3B quarter-final level has spent last 10 years studying model aerodynamics compiling de tailed design information has performed field tests effects ballast sink rate flying speed gracious enough let Lee use notebook design information provided airfoil polar data use libraries Since calculating virtually same parameters MaxSoar provided good check code compiling design information hand took about 10 hours per model did calculate performance polars Much time spent checking math mistakes computers dont make Now MaxSoar takes about 30 minutes including performance polars Since has flown designs documented believe him says MaxSoars calculated performance corre lates well flight experience Gliders performed relative another crux issue designer needs basis comparing design versus another believe programs provide basis As can see times mentioned above programs provide 20-to- 1 reduction time required calculate simple design pa rameters let alone performance data takes about five months build Glider few hours front computer can keep building Glider going perform expectations consider time well spent thanks John Hohensee taking time write above letter New Soaring club George Voss wrote let us know Oklahoma City Silent Fliers club now operation Sailplaners Okie City area can get information George 1403 Lincolnshire Road Oklahoma City OK 73159 telephone 1-405/793-9213 RC Aerobatics/Van Putte Continued page 53 nation can deviate normal still able score Hanno makes style rather following hes World Champion STYLE PREFERENCE isnt exactly same what Ive talking about Im talk ing about guy wants see pattern flown particular way other styles will appreciated Everyone like some degree some us very bad about know local judge likes low fast Thats worth extra point maneuver isnt fair either its human nature very difficult counter try let affect score 152 Model Aviation Introducing Invisible SvitchTM Made USA
Edition: Model Aviation - 1989/10
Page Numbers: 48, 49, 50, 51, 149, 152
EXCITEMENT California being caused flying season Mark Allens new Falcon 880 de sign ship spans 112 has beautifully made Kevlar-reinforced fiberglass fuselage Se hg 3021 airfoil ailerons/flaps balsa-sheeted foam core wings modified Schuemann planform distinctive feature upswept wing tips outer 10 all-flying stab rudder built-up balsa construction Four servos wings ailerons flaps making computer radios like Airtronics Vision easiest way go Visions threeposition Launch/Cruise/Speed switch permits pre setting entire trailing edge three modes crow landing configuration flaps down 900 ailerons up 250 makes hitting spot much consistent regular fourchannel radio using Y connectors would fly Falcon youd give up nice mixing preset functions Falcon does incorporate thing overly unusual days However Mark seems have brought off perfect com bination model Sailplane design elements does Falcon look right its early com petition record quality workmanship kit making very hot ticket fact Marks problem has keeping up de mand asked Mark hed give us quick rundown what thinking about designed Falcon what said Falcon 880 designed give Thermal Duration pilot highest possible per formance versatility being difficult fly designed clean sheet paper New technology form Selig computerdesigned wind-tunnel-tested airfoils Schue mann wing planform theory F3B competition ex perience computer radio flexibility used achieve design goals Falcon Airfoils combination Selig 3021 3014 used because good lifting capa bilities thermaling speeds very low drag high speeds S-30 14 used tip elim inate tip stalling can problem swept-back tips Wing planform Wing vortex drag 50% total Sailplane drag thermaling speed Schuemann wing planform dramatically reduces drag thereby increasing L/D reducing sink rate better Thermal performance Upswept tips increase stability maximize Schuemann wing planform efficiency com petitors after seeing well Falcon flies have put type tip planes re port increase performance sta ble easier fly Sailplane am very interested continuing development tips would welcome comments persons have tried planes Overall size Much time spent computer determine optimum wingspan aspect ratio things such aspect ra tio vs Reynolds number wing strength over handling characteristics carefully ana lyzed result 112-in span 1425 pect ratio slightly smaller cur rent breed Unlimited Class Sailplanes fers advantages biggest advantages launching landing Most club winches used contests somewhat limited power line speed its smaller size overall low drag Falcon well matched winches can instantly accelerate top launch spectacular zoom Crisp aileron control stow speed big 9fl0 flaps opti mum size give Falcon unmatched landing ac curacy needed winning contests Drag Low overall drag achieved com bining very low-drag fuselage low-drag air foils gives Falcon 880 best L/D penetration Sailplane manufactured US Summary Falcon 880 offers competi tion highest performance versatility yet very easy forgiving fly Its low drag enables Falcon outlaunch outdistance competition searching lift Once lift 48 Model Aviation Radio Conoi Soaring Byron Blakeslee 3134 N Wlnnebago Dr Sedalla CO 80135 Flite Line Composites new Falcon 880 has phenomenal contest record California Wingspan 112 Byron has lot say about Glider months columnn Wing has upswept tips flaps ailerons Fuselage Keviar-reinforced fiberglass Photo below shows plane crow configuration fast descent flaps down 90 ailerons up about 250 Tom Rents daughter Sharla looks mighty happy hold dads modified Olympic 88 new wing designed built 25 MRCSS members used primarily high-tech replacement Olympic 650 Rake on-board ESYM expanded-scale voltmeter row 10 LEDs top th@ circuIt board light up sequence tell state charge receivers NiCd battery pack info column fpund thermals best As mentioned above Falcon very impressive contest record first half 89 Among notable showings wins Bob McGowan both Western States Cham pionships Modesto LSF/SBSS Nation als Morgan Hill CA second sixth NSS/TOSS Masters Contest Fred Weaver Bob McGowan first Hans Weiss Memorial Slope Race Daryl Perkins first third 60-plus-contestant North Coast Soaring League/SBSS March contest Bob Mark Personally Im very anxious try Falcon because looks like ideal ship new Sportsman Multi-Task SMT event fact entry RCSD Challenge rule SMT planes full details discussed minute weight limit 75 ounces stock Falcon weighs 60 65 oz giving about lO-oz/sq-ft wing loading could add 10-15 oz ballast Speed task mak ing loading respectable 123 oz/sq ft legal weight Going contest results Falcon able compete nicely Duration big boys Lovesongs Meteors etc So youd expect Falcon capable doing well threetask Duration Speed Distance SMT events very encouraging because think 112in-span plane makes handy size all-around Glider Its big enough perform well small enough too much handful espe cially windy weather Itll go up easily hi start fun flying also power-zoom off winches contests strictly Slope flying Mark Daryl com pletely cover Falcons wings 1 5-oz per sq yd Ed glass cloth use arrow-shaft hinges brings weight up 74 ounces can add up 25 lb lead move CG back 3/ ina condition Mark says itll really smoke Mark also said Michael Selig himself called order Falcon kit Mark asked Michael based recently completed Princeton wind tunnel tests would want different airfoils plane standard S-3021/3014 com bination Michael said No Sounds good enough mc Mark selling semikits consisting finished fiberglass fuselage fitted canopy foam cores full-size core beds plans about $115 complete kit adds balsa wing sheeting balsa sticks fiberglass cloth carbon fiber reinforcements wing hard ware sells $175 Both kits will cost few extra bucks shipping kit looks like itll build pretty fast especially wings vac mayor decals DECALS PRESSURE SENSITIVEWATER TRANSFER Over 750 Select *7 1/4 Scale18 Sheets * 60 Size38 Sheets * 40 Size38 Sheets * Propeller Decals . WT Only 6 Sheets3 sizes ea * Kill MerkingsWT Only6 Sheets * Nomenclature Markings 3 Sizes-12 Sheds Black White copy * Letters Numbers 1/4-3/8-I/2-5/8-3/4-7/512344-13116 10 colors See color chart * Flags. American United Kingdom Confederate * Stars 10 Colors 8 Sizes pias Sheet Assorted Sizes * Trim Sheets 4-3/4 26 10 Colors see color chart Authentic model insignias pressure sensitive %d r47e9 mater transfer 1/4 scale 40 end 60ckSS4decals size propeller decals World War II kill mark-major ings stars flags letters numbers trim sheets NORTHEAST SCREEN GRAPHICS 21 FISHER AVE. EAST LONGUEADOW MA 01028 TEL 413-525-4110 INJECTION MOLDED FUSELAGE WING STAB& FIN PREFORMED LANDING GEAR STEERABLE NOSE WHEEL NYLON MOTOR MOUNT& BEARING STEERING ARM HINGES PUSH RODS MISC HARDWARE VACUUM FORMED CLEAR CANOPY AND EXHAUST STACKS 3-4 CH WE INVITE DEALER INQUIRIES FOR INFORMATION CALL OR WRITE 0 7_ m C 0 E C E 2- C m C C I m m SUCKER-KIT.. $5995 VHS Show & Tell Video $3995 Add $400 shipping & handling Ml residents add 4% sales tax Send Si 00 SASE Icr product list Samples real wEd veneer skins Product List Includes flapless Arrow Shalt Hinges Carbon Tow Mylar Sheet High-Tech iems Dealer Inquires Welcome SEND CHECK DR MONEY ORDER TO PO Box 866 Lapeer Ml 48446 313 664-3330 October 1989 49 Another Great Twin AmDhlblan G & P SALES GRUMMAN ALBATROSS HU-16BCONSOLIDATED PBY-5A CATALINA 81 inch wing span e 810 sq inches 13 lbs 1 inchwingspannoo9sqincheaell lbs nTwin 40 2C engine size 5 FIberglass fuselage Foam Twin 30-40 engine size Fiberglass fuselage Vacuum wing stab cores Includes wood s Vac formedformed clear acatate cockpit blisters Vac formed cowls nacellesstyrene cowls end nacallas Preformed landing gear $25995 plus shipping tax applicableland operation Retractable wing floats Retractable landing gear ktt 85$23995 plus ahipping tax applicable 90 mInute VHS video buIldIng flyIng *246690 minute VHS video building flying .. *2488 G & P SALES 410 College Ave Angwin CA 94508 965-3866 SURE FLITE 40 Power 51 WINGSPAN AIRACOBRA SUPER FUN SCALE 40 SIZE WARBIRD FAST ASSEMBLY EASY TO FLY U SURE FLITE ENTERPRISES 23015 DEL LAGO DRIVE LAG UNAHILLS CA92553 714 855-4402 Composite Aircraft ENUn & Supply FAX 649780 TAIBI iCH3646___________3NCH3646 BALSA WOOD STICKS 1/16-INCH3645 1116111606 1/1603/3207 11161/80611 1/16o3/160913 1/161/41015 1/163/81317 1/1601/21620 1/163/42126 3/32-INCH3646 3/320 3/320811 3/3201/80913 3/3203/161015 3/32 o 1/41316 3/3203/61419 3/32 0 1/21621 3/32 0 3/42431 Double Balsa Wood Prrces Spruce Bauuaood OScirs 1/8e 1/80811 1/603/161115 1/801/41317 1/803/61621 1/80 1/21724 1/60 3/42533 3/1 6-INCH3648 3/16 03/161317 3/160 1/41419 3/16 o 3/81821 3/160 1/21825 3/160 3/42838 1/4-INCH3648 1/4 0 1/41621 1/403/81825 1/40 1/22129 1/403/43142 5/16-INCH3646 5/1605/162027 5/16 o 3/82230 5/16 o 1/22736 5/16 o 3/43952 3/6-INCH3646 3/8 0 3/82737 3/80 1/23041 3/8 o 3/44460 1/2-INCH3648 1/20 1/23749 1/203/45270 TRIANGULAR CUT BALSA 1/4 0 1/40 3624 3/803/803629 1/201/203837 3/403/403647 10103661 BALSA PLANKS 3/403038178 102036164 103036230 104036303 202036230 203038329 2u4o36464 303038490 304036680 BALSA SHEETS 1-INCH3648 1/180 12736 3/32 13040 1/8e13344 3/18013749 1/4014157 3/8 015372 1/2018588 2-INCH3648 1/32023040 1/16 023648 3/32 0 24154 1/8e24660 3/180 25472 1/4e26384 3/60277103 1/202113150 1/32034053 1/16034358 3/32 0 35270 1/80 36080 3/16 037295 1/4 o 384112 5/1803103134 3/903120180 1/203150200 4-INCH3648 1/32046587 1/180473101 3/320482109 1/80495126 3/1804114151 1/404131193 3/804182271 1/204219325 BIRCH PLY WOOD 1/840 120 12175 1/640 120 24350 1/64o 12 48700 1/840480482800 1/32o6u1252 1/32u120 10105 1/32 012o 24210 1/32012049420 1/160801252 1/160120 12105 1/16 0120 24210 1/16012048420 3/32u6o1291 3/330120 12183 3/32 012u 24328 3/32u12048852 1/8060 1289 1/80 120 12178 1/8 12 24356 1/8o12o48712 3/160601274 3/16 012o 12146 3/16012024293 3/18012048595 Superior Aircraft Materials 1/40801274 1/40120 12146 1/4 0120 24293 1/4 012048085 3/80 120 12150 3/8 0 12 0 24360 3/8 0 12 48720 1/20120 12202 1/2012024405 1/2012048808 LITE PLYWOOD 1/801201258 1/6 0 12 024112 1/6 0 12 048224 TAPERED TRAILING EDGE3646 1/8o 1/22230 3/16 0 3/42940 1/4 e 14255 5/180 14481 3/60 1/a5272 12020-G Centralia iian Gardens California 90716 865-3220 Handling Charge $5-OG $300 COD mum Order $2000 FOB Factory accept Personal Checks COD fornia Residents add 6% Sales Tax uum bagged Contact Mark Allen exact price deliv ery info Flite Lite Composites PO Box 1493 Windsor CA 95492 telephone 1-707/8383390 Oly 88 project Tom Rent treasurer newsletter editor Minnesota R/C Soaring Society sent interesting letter club recently designed alternate wing Airtronics Olympic 650 kit can tach existing 650 fuselages wing modern design combining Selig 3021 airfoil sheeted foam cores ailerons spoilers uses straight dihedral can built one-piece two-piece wing attaches top 650 fuselage elastic bands -MRCSS kitted over 25 wings November sold quickly within club $10 kit included cores plans sheeting control cables root ribs joiner rod/brass tubes control horns committee mem bers designed built wing under expert guidance Bob Scaly named plane Oly 88 year conceived Several Oly 88s have competed first few contests 89 season good results against Prodigies Sagitta 600s Gnomes project helped members experi ence modern composite construction techniques migration ailerons advancing effi cient airfoils very pleased re suits Unfortunately club wont manufac turing kits However article Oly 88 may submitted MA later year magazine buys plans would avail able through MA s Full-Size Plan service Well see Enclosed photo daughter Sharla age four years proudly holding Oly 88 opted use plug-in arrangement Oly 88 wing modified tail feathers match shape wing model has 72-in span 619 sq area weighs 35 oz flies great both Slope Thermaling Thanks very much story photo Tom excellent example club members can get together work project benefits everyone especially stepping up poly ships ailerons though MRCSS wont making wing kits perhaps Bob Sealy could convinced cut some cores Maybe Toms Oly 88 started life Oly 650 sure doesnt look like now Quite nice looker both daughter Sharla plane Another lesson Oly 88 project start something flies well make demon tweaks friend Randy Reynolds calls have good chance success Modelers temperament born tinkerers Id bet us has ever built kit exactly supposed con structed know can improve de sign Go aheadhave fun Thats what Soar ing hobby about Roke onboard ESYM Roland Kern maker Roke line beautiful Scale Sailpianes Germany has come out important item insurance plane As can see photo its little electronic gadget row 10 mini-LED lamps across top two left red next two yellow six right green wire up Roke Expanded Scale Volt Meter pig tail suit radio plug unused receiver servo socket Assuming fully charged battery pack turn receiver switch lamps will consecutively flash starting left set tle down green lamps right illuminated what reading green lamp farthest right indicates 51 volts next 50 volts etc Sometimes two adjacent lamps will indicating voltage tween two values Make sketch 10 lamps Count off tenths volt youll see leftmost green lamp indicates 46 volts low re ceiver pack can safely used two yellow lamps indicate 45 44 volts R L about lowest voltage will drive servos red lamps indicate 43 42 volts definitely crash time really neat thing about onboard ESVM reads actual voltage pack onHERES UNIQUE TIME PIECE THAT FEATURES FAMILIAR FACE THE ALTIMETER WALL CLOCK Perfect den office Quality quartz movement Full 1 year warranty Four other models available Horizon cIock DG clock VOR clock & Airspeed thermometer DEALER ENQUIRIES WELCOME SEND CHEQUE OR MONEY ORDER FOR $3996 UPS T& AIRUNE SUPPLY CO 98-116 PINELLAS BAYWAY TIERRA VERDE FLORIDA 33715 TO ORDER TOLL FREE 1-800-848-2739 FLORIDA RESIDENTS ADD 6% SALES TAX 50 Model Aviation Last Call Module 7SP ATRCS retro-fit program will end Iecember 311989 sure get conversion soon ATRCSTM Advanced Technology Radio Control System Converts Module 75P advanced computerized control system Stores four aircraft setups Includes seven different servo configurations Individual surface travel limits centering Single switch presets launch speed modes Full trailing edge control Enhanced mixing functions Crow landing capability User selectable cross trim capability Flap stick reversing Elevator camber VTR Automatic selection high ail rudder mixing launch landing modes Fully installed kit year limited warranty Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 Airtroni~ Module 75P registered trademarks Airtroni Inc der actual loads say turn re ceiver switch 50-volt lamp lights up indicates voltage fully charged pack under minimal load ie receiver servos idling Current draw may 50 100 mA depending type re cetver Now turn transmitter stir sticks around servos may drawing high peak amperage total actual load pack could up around /2 1 ampere load voltage will drop two three tenths volt can actually see whats happening lighting up lamps lefi indicating 50 volts stop moving sticks 50-volt lamp should come back worst things can happen Glider have bad servo binding con trol surface puts too great load servo Either case results excessive current draw can quickly run down pack can get indication problem like ing far down green lamps light up work transmitter sticks Itll take some experience Roke ESVM before feel confident about lamp lit versus ining flying time Re member four-cell Ni-Cd receiver packs have relatively flat discharge curve down 44 volts Below curve falls off shelf Probably short flight should attempted voltage down 47-volt lamp can get Roke ESVM Roke im porter Tony Arnoux Imports Inc 1744 NW 82nd Ave Miami FL 33126 price $25 postpaid people flying Scale planes costing $1000 extra $25 certainly worth peace mind Come think plane doesnt have cost much make onboard ESVM worth correspond Tony might want ask him about Wik Rowing other German Scale ships now bringing Sportsman F3B update As youve probably heard quite few us sportsman fliers very excited about trying new eventwhich might better called Sportsman Multi-Task Soar ing SMTNo SMUT idea fly simplified Duration Distance Speed tasks similar F3B big using Sailplanes considerably tamer real F3B planes fliers have indicated desire partici pate contests bit challenging straight Thermal Duration strict F3B rules What talking about mid dleground Soaring Randy Reynolds dis cussed February column Take another look dont remember Sailplaners Ive talked about SMT just about have strong reactionsboth pro conbut mostly very positive makes think may something good Jim Gray publisher R/C Soaring Digest took bull horns said OK lets have RCSD Challenge Design Competition select example competitive Sportsman Multi-Task Glider lets recommend rules planes contest tasks clubs around country can run more-or-less similar SMT events Challenge Rules commit tee turned out Jim John Dvorak Don Edberg Gus Peleuses Randy Reynolds self vote rules planes tasks completed June RCSD Challenge win ning plane selected July Ill have give outcome next month since Im writing June what committee voted recom mend SMT rules PlanesOnly rule 75-oz maximum total weight including ballast As long planes weight below 75 oz anything else OK No restrictions span wing loading kit cost con struction materials controls radios original de signs builder model etc Tasks Duration using Percentage Slot system same new F3J International Thermal Dura tion task F3B landing tape recommended Dis tance using AMA Distance Task T7 per rule book page 93 Speed using AMA Speed Task T8 per rule book page 93 safety lineexcept recommend flier get two tries back-to-back better time counted Continued page 149 AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 Z ber 1989 51 1ursu 1i iou 1111 mrii A SHEETS 36 45 30 1 162 33 3322 40 162 43 3162 49 14 2 56 1 323 37 1 203 37 1 163 32 49 31 3323 44 56 37 18 3 54 71 46 3163 62 62 55 143 73 95 61 5163 85110 36 3 66124 71 123110155 34 3165191 1164 56 7646 3324 20 84 56 16 4 6010666 3164 93122 75 14 411013464 36 4165220139 2 4225261 MATCHED SHEETS 42 3324100 154106 3164120 144131 BALSA STICKS 3648 1161409 1163610 161214 332 1410 332 3812 332 1216 18 1606 16141116 18 361216 16 121024 3163161116 316 361720 316 122230 14 141624 14 391926 4122130 14343444 14 14055 5165162126 36 362737 39 123246 36 344255 36 15270 12123653 12344062 12 15876 56 584665 34 346790 * LIGHT46 LB BALSA TRIANGLES36 WOOD36 25353 68300353 356353 45363 558 3 669 BALSA PLANKS364 304 65822 5056 00242 14z6013335 1123275116463 11243603324100 22225164115 233253164133 24435144156 33495364236 34666124322 TAPERED SHEETS36 14265 14365 36266 36396 123120 LONE STAREPOXY SoLol695 696 10,598 30o,o596 TRAILING EDGE 36 14132 S161 1439 3611246 122~70 INSTANT GLUE 1 0 Thck 296 1 0 Tloo 296 2, TSck 550 2o 15n 550 must try 4-6 lb balsa BASSWOOD48 31631626 3161435 31631636 3161246 3163465 11411442 1431649 143460 36 3660 361270 3163490 121290 1234100 BUNDLE DEALS 301116336699 201164361035 20332 60 15332436955 1516336735 10116436695 16316336920 153164 36635 1014 336655 10-14436930 1036336670 53164 5 512336540 61124361060 15332446665 616446500 6316446600 614446645 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 116 1161725 16 142026 16 382232 3163162636 114 143450 14 364055 1141124565 316s 364966 36 126077 12 1126666 1125347567 SPRUCE TRIANGLES 316 316 1212 34 IStS175 1I8x12350 ______________ __________________ 114s6 275 LONE STAR MODELS 1623 57th Se Lubbock TX 79412 Cant 48 Handling Charge pay UPS Add $300 COD $400 extra PP APO FPO Stases accept Vise MasterCard personal checks COD 6/ % tax Texas US currency Minimum Wood Order $1000 SAm53 HARD MAPLE 1 4 36 3636 36 1 2 3l6 34 1234 18 40 46 50 66 66 BIRCH DOWELS36 16 39 31611 1414 51625 3832 3PLYBIRCII 48 1164x12835 1132x12475 1116x12475 1I8x12495 RC Soaring/Blakeslee Continued page 51 Note tasks use working prep aration time CD assembles flight group everybody ready says Go No relaunches allowed except case winch organizer timer flagger failure An ideal SMT contest would have equal num bers of three tasks CDs en couraged mix-n-match listed tasks wish use other tasks option exam ple contest could three rounds Duration two Distanceor combination tasks task normalized 1000 points contest points simply sum task points Duration Distance flown man-on-man except contest too small fewer say nine entrants mix up flight groups Club winches can used should about equal power contestants own winch can used available about same power other winches Ballast can added removed time long total weight does exceed 75 oz As hero Al Doig would say Howzat realize number folks out readerland responding Terrific may vast Its fact bulk Glider guiders US sport flying Gentle Ladys Oly tls such smaller group Sailplaners enjoy contest flying maybe quar ter half will actually give SMT try Perhaps SMT will go way F3B ie enough fliers get interested develop necessary critical mass start chain reaction However Im hoping SMT will have broader appeal because its much easier Sportsman-level fliers get simpler clubs run Itll take few promoters club get ball rolling Once people find out exciting much fun Distance Speed tasks fly SMT could really take off As MA Soaring correspondent feel duty point out kicks satisfaction can experience moving up caliber planes Taking analogy full-size Soaring its similar advancing primary trainer like Schweizer 2-22 intermediate ship such Schweizer 1-35 finally glass racing beauty like Schempp-Hirth Discus 2-22 pi lot perfectly happy just being up air once tries l-35 knows hes faster responsive ship Its higher performance pro vides Soaring enjoyment Discus other step up ladder imagine its tough go back once youve flown Same thing models myself Im very excited about possibil ities Sportsman Multi-Task 75-oz rule easy fliers understand easy CDs administer specifically chosen keep planes being intimidating Sportsmanlevel pilots Lots good kit designs fill bill design own Pilots can get started what theyve got because just about Standard Class planes weight under 75 oz Planes will course vary sophistication pilot does well SMT will knows plane practices lot Also hop ing come up easy system placing SMT pilots Novice Intermediate Ex pert classes beginners will feel less trepi dation about flying experienced guys Contests dont have contests Clubs can schedule SMT Sessions just run Distance Speed tasks guarantee practic ing tasks will improve flying skills theyre fun boot Ill bet once 3U ex perience thrill racing neck-and-neck Distance task youll decide need faster plane Please let know what think magical design programs fol lowing letter John Hohensee pretty much clears up controversy over Johns com puter design program MaxSoar Its also very structive what MaxSoar Lee Murrays PC-Soar about John also wants let know new address S22 W27400 Fen way Drive Waukesha WI 53l88 telephone 4l4/52l-2472 Jeff Raskin correct says pro grams magical However think boo-boo can attributed excitenlent see ing useful new technology being made available modelers just got back National Computer Graphics Association convention sessions speaker showed slide think applies read Corollary Murphys Law Any sufficiently advanced technology indistinguishable magic Just MaxSoar PC-Soar magic neither programs used NASA McDonnell-Douglas Boeing pro grams approximate aircraft performance un der certain conditions reasons aircraft still test flown realize programs iii same class n3odelers have access Cray superconiputer Lee Continued page 152 October 1989 149 WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance BALSA HOT LINE Call fSOAf 745 6394 10 am6 pm Central Time SFLYEIACH 48 3I32x12700 118s12775 363116x12625 471l4x12625 643/8x12725 61112x12900 LITEPLY48 GROOVED LGMOUNTS 12 Inch 36341840 36 34632140 123431646 WOULD YOU SAW HOLE IN THIS FUSELAGE Der Svitch direct replacement on-board on/off switch radio equipment hides inside fuselage activated outside included bar magnet vibration proof reliable submers ible consumes no power easy use install Ideal scale sport float planes boats sail planes helicopters Dont ugly up fuselage Der Svitch TO BATTERY DERSVITCHBAR MAGNET CHARO NC JACK ECEIVER P00 Peo two basic models Model 1401 comes connectors use old ones $1995 Model 1402 comes connectors Futaba J G Airtronics $2995 Both models include installation instructions bar magnet Optionally available Model 1405 LED $895 red LED lamp 20 leads indicates radio state can installed instrument panel realistic effect Order Include name address specify models needed include check money order send Ragan/Barker Group 5050 Quorum Drive #741 Dallas TX 75240 Please add $250 perorderto cover UPS charges &TX residents add sales tax credit card orders call between 900 500 central M-F Please allow 2-4 weeks delivery RC Soaring/Blakeslee Continued page 149 believe products provide useful tool Sailplane fliers What MaxSoar PC-Soar Based input 30 design measurements such wingspan chord airfoil etc programs cal culate following 23 aircraft design parameters Wing area equivalent dihedral aspcct ratio recommended dihedral average chord angle incidence aerodynamic center loading Horizontal tail area average chord aspect ra tio aerodynamic center longitudinal stability fac tor Vertical tail area average chord aspect ra tio aerodynamic center tail volume sideslip stability factor Miscellaneous forward CG limit rear CG limit aircraft neutral point online help MaxSoar provides ranges average values calculated values way added Jeffs urg ing earlier letter Its thing able calculate sideslip instability factor its another have guide what should table flight speed Reynolds number tal aircraft drag coefficient sink rate lift-todrag ratio about 10 coefficient lift values generated about 50 num bers table calculating involves hundreds calculations Generating table re quires accessing data file 40 50 numbers representing performance polar airfoil being considered Incidentally currently pro vide about 70 airfoil polar data files adding data become available programs plot values can quickly understood designer MaxSoar PC-Soar allow designer overlay several aircraft polars com parison makes simple observe ef fects design changes compare different de signs see effect ballasting design course can output printer documenting design process discussing others Lee did just dream calcula tions upwe simply automated equa tions available modelers because peo ple like Martin Simons Lynn Cromer Ren Van Putte Alex Strojnik Michael Selig Blame Beron-Rawdon others published books articles aerodynamics mod els Are works last word model de sign Absolutely provide excel lent start would like address Jeffs specific com plaints mentions changing dihedral angle 200 sweeping wing 300 perform ance polars changing correct made conscious decision during writing programs disregard reduction projected area due dihedral decision based fact reduction lifting sur face 15 percent 100 dihedral average dihedral rudder-controlled Glider area reduction aileron ship 30 dihedral less 015 percent ab surd 200 dihedral reduces area 60 per cent program does calculate outlined several recent articles MA equivalent dihe dral angle based dihedral information pro vided designer equations programs indi cate effect performance due wing sweep unless affects area wingspan chord maintained wing swept area remains constant does affect perform ance according equations used would effects local angle attack various wing sections due circulation ef fects other sections what magni tude effects might dont know Jeff knows Lee would interested hear ing Jeff did mention wing sweep well horizontal vertical tail sweep correctly taken account calculation aerody namic centers neutral point tail volume etc Jeff mentions individual building up whole folders design comparisons states evaluations meaningless individ ual beta tester MaxSoar program has flown Gliders 20 years has achieved LSF Level IV needs eight-hour Slope flight Level V has participated local regional contests Great Race LSF Nats has also flown F3B quarter-final level has spent last 10 years studying model aerodynamics compiling de tailed design information has performed field tests effects ballast sink rate flying speed gracious enough let Lee use notebook design information provided airfoil polar data use libraries Since calculating virtually same parameters MaxSoar provided good check code compiling design information hand took about 10 hours per model did calculate performance polars Much time spent checking math mistakes computers dont make Now MaxSoar takes about 30 minutes including performance polars Since has flown designs documented believe him says MaxSoars calculated performance corre lates well flight experience Gliders performed relative another crux issue designer needs basis comparing design versus another believe programs provide basis As can see times mentioned above programs provide 20-to- 1 reduction time required calculate simple design pa rameters let alone performance data takes about five months build Glider few hours front computer can keep building Glider going perform expectations consider time well spent thanks John Hohensee taking time write above letter New Soaring club George Voss wrote let us know Oklahoma City Silent Fliers club now operation Sailplaners Okie City area can get information George 1403 Lincolnshire Road Oklahoma City OK 73159 telephone 1-405/793-9213 RC Aerobatics/Van Putte Continued page 53 nation can deviate normal still able score Hanno makes style rather following hes World Champion STYLE PREFERENCE isnt exactly same what Ive talking about Im talk ing about guy wants see pattern flown particular way other styles will appreciated Everyone like some degree some us very bad about know local judge likes low fast Thats worth extra point maneuver isnt fair either its human nature very difficult counter try let affect score 152 Model Aviation Introducing Invisible SvitchTM Made USA
Edition: Model Aviation - 1989/10
Page Numbers: 48, 49, 50, 51, 149, 152
EXCITEMENT California being caused flying season Mark Allens new Falcon 880 de sign ship spans 112 has beautifully made Kevlar-reinforced fiberglass fuselage Se hg 3021 airfoil ailerons/flaps balsa-sheeted foam core wings modified Schuemann planform distinctive feature upswept wing tips outer 10 all-flying stab rudder built-up balsa construction Four servos wings ailerons flaps making computer radios like Airtronics Vision easiest way go Visions threeposition Launch/Cruise/Speed switch permits pre setting entire trailing edge three modes crow landing configuration flaps down 900 ailerons up 250 makes hitting spot much consistent regular fourchannel radio using Y connectors would fly Falcon youd give up nice mixing preset functions Falcon does incorporate thing overly unusual days However Mark seems have brought off perfect com bination model Sailplane design elements does Falcon look right its early com petition record quality workmanship kit making very hot ticket fact Marks problem has keeping up de mand asked Mark hed give us quick rundown what thinking about designed Falcon what said Falcon 880 designed give Thermal Duration pilot highest possible per formance versatility being difficult fly designed clean sheet paper New technology form Selig computerdesigned wind-tunnel-tested airfoils Schue mann wing planform theory F3B competition ex perience computer radio flexibility used achieve design goals Falcon Airfoils combination Selig 3021 3014 used because good lifting capa bilities thermaling speeds very low drag high speeds S-30 14 used tip elim inate tip stalling can problem swept-back tips Wing planform Wing vortex drag 50% total Sailplane drag thermaling speed Schuemann wing planform dramatically reduces drag thereby increasing L/D reducing sink rate better Thermal performance Upswept tips increase stability maximize Schuemann wing planform efficiency com petitors after seeing well Falcon flies have put type tip planes re port increase performance sta ble easier fly Sailplane am very interested continuing development tips would welcome comments persons have tried planes Overall size Much time spent computer determine optimum wingspan aspect ratio things such aspect ra tio vs Reynolds number wing strength over handling characteristics carefully ana lyzed result 112-in span 1425 pect ratio slightly smaller cur rent breed Unlimited Class Sailplanes fers advantages biggest advantages launching landing Most club winches used contests somewhat limited power line speed its smaller size overall low drag Falcon well matched winches can instantly accelerate top launch spectacular zoom Crisp aileron control stow speed big 9fl0 flaps opti mum size give Falcon unmatched landing ac curacy needed winning contests Drag Low overall drag achieved com bining very low-drag fuselage low-drag air foils gives Falcon 880 best L/D penetration Sailplane manufactured US Summary Falcon 880 offers competi tion highest performance versatility yet very easy forgiving fly Its low drag enables Falcon outlaunch outdistance competition searching lift Once lift 48 Model Aviation Radio Conoi Soaring Byron Blakeslee 3134 N Wlnnebago Dr Sedalla CO 80135 Flite Line Composites new Falcon 880 has phenomenal contest record California Wingspan 112 Byron has lot say about Glider months columnn Wing has upswept tips flaps ailerons Fuselage Keviar-reinforced fiberglass Photo below shows plane crow configuration fast descent flaps down 90 ailerons up about 250 Tom Rents daughter Sharla looks mighty happy hold dads modified Olympic 88 new wing designed built 25 MRCSS members used primarily high-tech replacement Olympic 650 Rake on-board ESYM expanded-scale voltmeter row 10 LEDs top th@ circuIt board light up sequence tell state charge receivers NiCd battery pack info column fpund thermals best As mentioned above Falcon very impressive contest record first half 89 Among notable showings wins Bob McGowan both Western States Cham pionships Modesto LSF/SBSS Nation als Morgan Hill CA second sixth NSS/TOSS Masters Contest Fred Weaver Bob McGowan first Hans Weiss Memorial Slope Race Daryl Perkins first third 60-plus-contestant North Coast Soaring League/SBSS March contest Bob Mark Personally Im very anxious try Falcon because looks like ideal ship new Sportsman Multi-Task SMT event fact entry RCSD Challenge rule SMT planes full details discussed minute weight limit 75 ounces stock Falcon weighs 60 65 oz giving about lO-oz/sq-ft wing loading could add 10-15 oz ballast Speed task mak ing loading respectable 123 oz/sq ft legal weight Going contest results Falcon able compete nicely Duration big boys Lovesongs Meteors etc So youd expect Falcon capable doing well threetask Duration Speed Distance SMT events very encouraging because think 112in-span plane makes handy size all-around Glider Its big enough perform well small enough too much handful espe cially windy weather Itll go up easily hi start fun flying also power-zoom off winches contests strictly Slope flying Mark Daryl com pletely cover Falcons wings 1 5-oz per sq yd Ed glass cloth use arrow-shaft hinges brings weight up 74 ounces can add up 25 lb lead move CG back 3/ ina condition Mark says itll really smoke Mark also said Michael Selig himself called order Falcon kit Mark asked Michael based recently completed Princeton wind tunnel tests would want different airfoils plane standard S-3021/3014 com bination Michael said No Sounds good enough mc Mark selling semikits consisting finished fiberglass fuselage fitted canopy foam cores full-size core beds plans about $115 complete kit adds balsa wing sheeting balsa sticks fiberglass cloth carbon fiber reinforcements wing hard ware sells $175 Both kits will cost few extra bucks shipping kit looks like itll build pretty fast especially wings vac mayor decals DECALS PRESSURE SENSITIVEWATER TRANSFER Over 750 Select *7 1/4 Scale18 Sheets * 60 Size38 Sheets * 40 Size38 Sheets * Propeller Decals . WT Only 6 Sheets3 sizes ea * Kill MerkingsWT Only6 Sheets * Nomenclature Markings 3 Sizes-12 Sheds Black White copy * Letters Numbers 1/4-3/8-I/2-5/8-3/4-7/512344-13116 10 colors See color chart * Flags. American United Kingdom Confederate * Stars 10 Colors 8 Sizes pias Sheet Assorted Sizes * Trim Sheets 4-3/4 26 10 Colors see color chart Authentic model insignias pressure sensitive %d r47e9 mater transfer 1/4 scale 40 end 60ckSS4decals size propeller decals World War II kill mark-major ings stars flags letters numbers trim sheets NORTHEAST SCREEN GRAPHICS 21 FISHER AVE. EAST LONGUEADOW MA 01028 TEL 413-525-4110 INJECTION MOLDED FUSELAGE WING STAB& FIN PREFORMED LANDING GEAR STEERABLE NOSE WHEEL NYLON MOTOR MOUNT& BEARING STEERING ARM HINGES PUSH RODS MISC HARDWARE VACUUM FORMED CLEAR CANOPY AND EXHAUST STACKS 3-4 CH WE INVITE DEALER INQUIRIES FOR INFORMATION CALL OR WRITE 0 7_ m C 0 E C E 2- C m C C I m m SUCKER-KIT.. $5995 VHS Show & Tell Video $3995 Add $400 shipping & handling Ml residents add 4% sales tax Send Si 00 SASE Icr product list Samples real wEd veneer skins Product List Includes flapless Arrow Shalt Hinges Carbon Tow Mylar Sheet High-Tech iems Dealer Inquires Welcome SEND CHECK DR MONEY ORDER TO PO Box 866 Lapeer Ml 48446 313 664-3330 October 1989 49 Another Great Twin AmDhlblan G & P SALES GRUMMAN ALBATROSS HU-16BCONSOLIDATED PBY-5A CATALINA 81 inch wing span e 810 sq inches 13 lbs 1 inchwingspannoo9sqincheaell lbs nTwin 40 2C engine size 5 FIberglass fuselage Foam Twin 30-40 engine size Fiberglass fuselage Vacuum wing stab cores Includes wood s Vac formedformed clear acatate cockpit blisters Vac formed cowls nacellesstyrene cowls end nacallas Preformed landing gear $25995 plus shipping tax applicableland operation Retractable wing floats Retractable landing gear ktt 85$23995 plus ahipping tax applicable 90 mInute VHS video buIldIng flyIng *246690 minute VHS video building flying .. *2488 G & P SALES 410 College Ave Angwin CA 94508 965-3866 SURE FLITE 40 Power 51 WINGSPAN AIRACOBRA SUPER FUN SCALE 40 SIZE WARBIRD FAST ASSEMBLY EASY TO FLY U SURE FLITE ENTERPRISES 23015 DEL LAGO DRIVE LAG UNAHILLS CA92553 714 855-4402 Composite Aircraft ENUn & Supply FAX 649780 TAIBI iCH3646___________3NCH3646 BALSA WOOD STICKS 1/16-INCH3645 1116111606 1/1603/3207 11161/80611 1/16o3/160913 1/161/41015 1/163/81317 1/1601/21620 1/163/42126 3/32-INCH3646 3/320 3/320811 3/3201/80913 3/3203/161015 3/32 o 1/41316 3/3203/61419 3/32 0 1/21621 3/32 0 3/42431 Double Balsa Wood Prrces Spruce Bauuaood OScirs 1/8e 1/80811 1/603/161115 1/801/41317 1/803/61621 1/80 1/21724 1/60 3/42533 3/1 6-INCH3648 3/16 03/161317 3/160 1/41419 3/16 o 3/81821 3/160 1/21825 3/160 3/42838 1/4-INCH3648 1/4 0 1/41621 1/403/81825 1/40 1/22129 1/403/43142 5/16-INCH3646 5/1605/162027 5/16 o 3/82230 5/16 o 1/22736 5/16 o 3/43952 3/6-INCH3646 3/8 0 3/82737 3/80 1/23041 3/8 o 3/44460 1/2-INCH3648 1/20 1/23749 1/203/45270 TRIANGULAR CUT BALSA 1/4 0 1/40 3624 3/803/803629 1/201/203837 3/403/403647 10103661 BALSA PLANKS 3/403038178 102036164 103036230 104036303 202036230 203038329 2u4o36464 303038490 304036680 BALSA SHEETS 1-INCH3648 1/180 12736 3/32 13040 1/8e13344 3/18013749 1/4014157 3/8 015372 1/2018588 2-INCH3648 1/32023040 1/16 023648 3/32 0 24154 1/8e24660 3/180 25472 1/4e26384 3/60277103 1/202113150 1/32034053 1/16034358 3/32 0 35270 1/80 36080 3/16 037295 1/4 o 384112 5/1803103134 3/903120180 1/203150200 4-INCH3648 1/32046587 1/180473101 3/320482109 1/80495126 3/1804114151 1/404131193 3/804182271 1/204219325 BIRCH PLY WOOD 1/840 120 12175 1/640 120 24350 1/64o 12 48700 1/840480482800 1/32o6u1252 1/32u120 10105 1/32 012o 24210 1/32012049420 1/160801252 1/160120 12105 1/16 0120 24210 1/16012048420 3/32u6o1291 3/330120 12183 3/32 012u 24328 3/32u12048852 1/8060 1289 1/80 120 12178 1/8 12 24356 1/8o12o48712 3/160601274 3/16 012o 12146 3/16012024293 3/18012048595 Superior Aircraft Materials 1/40801274 1/40120 12146 1/4 0120 24293 1/4 012048085 3/80 120 12150 3/8 0 12 0 24360 3/8 0 12 48720 1/20120 12202 1/2012024405 1/2012048808 LITE PLYWOOD 1/801201258 1/6 0 12 024112 1/6 0 12 048224 TAPERED TRAILING EDGE3646 1/8o 1/22230 3/16 0 3/42940 1/4 e 14255 5/180 14481 3/60 1/a5272 12020-G Centralia iian Gardens California 90716 865-3220 Handling Charge $5-OG $300 COD mum Order $2000 FOB Factory accept Personal Checks COD fornia Residents add 6% Sales Tax uum bagged Contact Mark Allen exact price deliv ery info Flite Lite Composites PO Box 1493 Windsor CA 95492 telephone 1-707/8383390 Oly 88 project Tom Rent treasurer newsletter editor Minnesota R/C Soaring Society sent interesting letter club recently designed alternate wing Airtronics Olympic 650 kit can tach existing 650 fuselages wing modern design combining Selig 3021 airfoil sheeted foam cores ailerons spoilers uses straight dihedral can built one-piece two-piece wing attaches top 650 fuselage elastic bands -MRCSS kitted over 25 wings November sold quickly within club $10 kit included cores plans sheeting control cables root ribs joiner rod/brass tubes control horns committee mem bers designed built wing under expert guidance Bob Scaly named plane Oly 88 year conceived Several Oly 88s have competed first few contests 89 season good results against Prodigies Sagitta 600s Gnomes project helped members experi ence modern composite construction techniques migration ailerons advancing effi cient airfoils very pleased re suits Unfortunately club wont manufac turing kits However article Oly 88 may submitted MA later year magazine buys plans would avail able through MA s Full-Size Plan service Well see Enclosed photo daughter Sharla age four years proudly holding Oly 88 opted use plug-in arrangement Oly 88 wing modified tail feathers match shape wing model has 72-in span 619 sq area weighs 35 oz flies great both Slope Thermaling Thanks very much story photo Tom excellent example club members can get together work project benefits everyone especially stepping up poly ships ailerons though MRCSS wont making wing kits perhaps Bob Sealy could convinced cut some cores Maybe Toms Oly 88 started life Oly 650 sure doesnt look like now Quite nice looker both daughter Sharla plane Another lesson Oly 88 project start something flies well make demon tweaks friend Randy Reynolds calls have good chance success Modelers temperament born tinkerers Id bet us has ever built kit exactly supposed con structed know can improve de sign Go aheadhave fun Thats what Soar ing hobby about Roke onboard ESYM Roland Kern maker Roke line beautiful Scale Sailpianes Germany has come out important item insurance plane As can see photo its little electronic gadget row 10 mini-LED lamps across top two left red next two yellow six right green wire up Roke Expanded Scale Volt Meter pig tail suit radio plug unused receiver servo socket Assuming fully charged battery pack turn receiver switch lamps will consecutively flash starting left set tle down green lamps right illuminated what reading green lamp farthest right indicates 51 volts next 50 volts etc Sometimes two adjacent lamps will indicating voltage tween two values Make sketch 10 lamps Count off tenths volt youll see leftmost green lamp indicates 46 volts low re ceiver pack can safely used two yellow lamps indicate 45 44 volts R L about lowest voltage will drive servos red lamps indicate 43 42 volts definitely crash time really neat thing about onboard ESVM reads actual voltage pack onHERES UNIQUE TIME PIECE THAT FEATURES FAMILIAR FACE THE ALTIMETER WALL CLOCK Perfect den office Quality quartz movement Full 1 year warranty Four other models available Horizon cIock DG clock VOR clock & Airspeed thermometer DEALER ENQUIRIES WELCOME SEND CHEQUE OR MONEY ORDER FOR $3996 UPS T& AIRUNE SUPPLY CO 98-116 PINELLAS BAYWAY TIERRA VERDE FLORIDA 33715 TO ORDER TOLL FREE 1-800-848-2739 FLORIDA RESIDENTS ADD 6% SALES TAX 50 Model Aviation Last Call Module 7SP ATRCS retro-fit program will end Iecember 311989 sure get conversion soon ATRCSTM Advanced Technology Radio Control System Converts Module 75P advanced computerized control system Stores four aircraft setups Includes seven different servo configurations Individual surface travel limits centering Single switch presets launch speed modes Full trailing edge control Enhanced mixing functions Crow landing capability User selectable cross trim capability Flap stick reversing Elevator camber VTR Automatic selection high ail rudder mixing launch landing modes Fully installed kit year limited warranty Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 Airtroni~ Module 75P registered trademarks Airtroni Inc der actual loads say turn re ceiver switch 50-volt lamp lights up indicates voltage fully charged pack under minimal load ie receiver servos idling Current draw may 50 100 mA depending type re cetver Now turn transmitter stir sticks around servos may drawing high peak amperage total actual load pack could up around /2 1 ampere load voltage will drop two three tenths volt can actually see whats happening lighting up lamps lefi indicating 50 volts stop moving sticks 50-volt lamp should come back worst things can happen Glider have bad servo binding con trol surface puts too great load servo Either case results excessive current draw can quickly run down pack can get indication problem like ing far down green lamps light up work transmitter sticks Itll take some experience Roke ESVM before feel confident about lamp lit versus ining flying time Re member four-cell Ni-Cd receiver packs have relatively flat discharge curve down 44 volts Below curve falls off shelf Probably short flight should attempted voltage down 47-volt lamp can get Roke ESVM Roke im porter Tony Arnoux Imports Inc 1744 NW 82nd Ave Miami FL 33126 price $25 postpaid people flying Scale planes costing $1000 extra $25 certainly worth peace mind Come think plane doesnt have cost much make onboard ESVM worth correspond Tony might want ask him about Wik Rowing other German Scale ships now bringing Sportsman F3B update As youve probably heard quite few us sportsman fliers very excited about trying new eventwhich might better called Sportsman Multi-Task Soar ing SMTNo SMUT idea fly simplified Duration Distance Speed tasks similar F3B big using Sailplanes considerably tamer real F3B planes fliers have indicated desire partici pate contests bit challenging straight Thermal Duration strict F3B rules What talking about mid dleground Soaring Randy Reynolds dis cussed February column Take another look dont remember Sailplaners Ive talked about SMT just about have strong reactionsboth pro conbut mostly very positive makes think may something good Jim Gray publisher R/C Soaring Digest took bull horns said OK lets have RCSD Challenge Design Competition select example competitive Sportsman Multi-Task Glider lets recommend rules planes contest tasks clubs around country can run more-or-less similar SMT events Challenge Rules commit tee turned out Jim John Dvorak Don Edberg Gus Peleuses Randy Reynolds self vote rules planes tasks completed June RCSD Challenge win ning plane selected July Ill have give outcome next month since Im writing June what committee voted recom mend SMT rules PlanesOnly rule 75-oz maximum total weight including ballast As long planes weight below 75 oz anything else OK No restrictions span wing loading kit cost con struction materials controls radios original de signs builder model etc Tasks Duration using Percentage Slot system same new F3J International Thermal Dura tion task F3B landing tape recommended Dis tance using AMA Distance Task T7 per rule book page 93 Speed using AMA Speed Task T8 per rule book page 93 safety lineexcept recommend flier get two tries back-to-back better time counted Continued page 149 AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 Z ber 1989 51 1ursu 1i iou 1111 mrii A SHEETS 36 45 30 1 162 33 3322 40 162 43 3162 49 14 2 56 1 323 37 1 203 37 1 163 32 49 31 3323 44 56 37 18 3 54 71 46 3163 62 62 55 143 73 95 61 5163 85110 36 3 66124 71 123110155 34 3165191 1164 56 7646 3324 20 84 56 16 4 6010666 3164 93122 75 14 411013464 36 4165220139 2 4225261 MATCHED SHEETS 42 3324100 154106 3164120 144131 BALSA STICKS 3648 1161409 1163610 161214 332 1410 332 3812 332 1216 18 1606 16141116 18 361216 16 121024 3163161116 316 361720 316 122230 14 141624 14 391926 4122130 14343444 14 14055 5165162126 36 362737 39 123246 36 344255 36 15270 12123653 12344062 12 15876 56 584665 34 346790 * LIGHT46 LB BALSA TRIANGLES36 WOOD36 25353 68300353 356353 45363 558 3 669 BALSA PLANKS364 304 65822 5056 00242 14z6013335 1123275116463 11243603324100 22225164115 233253164133 24435144156 33495364236 34666124322 TAPERED SHEETS36 14265 14365 36266 36396 123120 LONE STAREPOXY SoLol695 696 10,598 30o,o596 TRAILING EDGE 36 14132 S161 1439 3611246 122~70 INSTANT GLUE 1 0 Thck 296 1 0 Tloo 296 2, TSck 550 2o 15n 550 must try 4-6 lb balsa BASSWOOD48 31631626 3161435 31631636 3161246 3163465 11411442 1431649 143460 36 3660 361270 3163490 121290 1234100 BUNDLE DEALS 301116336699 201164361035 20332 60 15332436955 1516336735 10116436695 16316336920 153164 36635 1014 336655 10-14436930 1036336670 53164 5 512336540 61124361060 15332446665 616446500 6316446600 614446645 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 116 1161725 16 142026 16 382232 3163162636 114 143450 14 364055 1141124565 316s 364966 36 126077 12 1126666 1125347567 SPRUCE TRIANGLES 316 316 1212 34 IStS175 1I8x12350 ______________ __________________ 114s6 275 LONE STAR MODELS 1623 57th Se Lubbock TX 79412 Cant 48 Handling Charge pay UPS Add $300 COD $400 extra PP APO FPO Stases accept Vise MasterCard personal checks COD 6/ % tax Texas US currency Minimum Wood Order $1000 SAm53 HARD MAPLE 1 4 36 3636 36 1 2 3l6 34 1234 18 40 46 50 66 66 BIRCH DOWELS36 16 39 31611 1414 51625 3832 3PLYBIRCII 48 1164x12835 1132x12475 1116x12475 1I8x12495 RC Soaring/Blakeslee Continued page 51 Note tasks use working prep aration time CD assembles flight group everybody ready says Go No relaunches allowed except case winch organizer timer flagger failure An ideal SMT contest would have equal num bers of three tasks CDs en couraged mix-n-match listed tasks wish use other tasks option exam ple contest could three rounds Duration two Distanceor combination tasks task normalized 1000 points contest points simply sum task points Duration Distance flown man-on-man except contest too small fewer say nine entrants mix up flight groups Club winches can used should about equal power contestants own winch can used available about same power other winches Ballast can added removed time long total weight does exceed 75 oz As hero Al Doig would say Howzat realize number folks out readerland responding Terrific may vast Its fact bulk Glider guiders US sport flying Gentle Ladys Oly tls such smaller group Sailplaners enjoy contest flying maybe quar ter half will actually give SMT try Perhaps SMT will go way F3B ie enough fliers get interested develop necessary critical mass start chain reaction However Im hoping SMT will have broader appeal because its much easier Sportsman-level fliers get simpler clubs run Itll take few promoters club get ball rolling Once people find out exciting much fun Distance Speed tasks fly SMT could really take off As MA Soaring correspondent feel duty point out kicks satisfaction can experience moving up caliber planes Taking analogy full-size Soaring its similar advancing primary trainer like Schweizer 2-22 intermediate ship such Schweizer 1-35 finally glass racing beauty like Schempp-Hirth Discus 2-22 pi lot perfectly happy just being up air once tries l-35 knows hes faster responsive ship Its higher performance pro vides Soaring enjoyment Discus other step up ladder imagine its tough go back once youve flown Same thing models myself Im very excited about possibil ities Sportsman Multi-Task 75-oz rule easy fliers understand easy CDs administer specifically chosen keep planes being intimidating Sportsmanlevel pilots Lots good kit designs fill bill design own Pilots can get started what theyve got because just about Standard Class planes weight under 75 oz Planes will course vary sophistication pilot does well SMT will knows plane practices lot Also hop ing come up easy system placing SMT pilots Novice Intermediate Ex pert classes beginners will feel less trepi dation about flying experienced guys Contests dont have contests Clubs can schedule SMT Sessions just run Distance Speed tasks guarantee practic ing tasks will improve flying skills theyre fun boot Ill bet once 3U ex perience thrill racing neck-and-neck Distance task youll decide need faster plane Please let know what think magical design programs fol lowing letter John Hohensee pretty much clears up controversy over Johns com puter design program MaxSoar Its also very structive what MaxSoar Lee Murrays PC-Soar about John also wants let know new address S22 W27400 Fen way Drive Waukesha WI 53l88 telephone 4l4/52l-2472 Jeff Raskin correct says pro grams magical However think boo-boo can attributed excitenlent see ing useful new technology being made available modelers just got back National Computer Graphics Association convention sessions speaker showed slide think applies read Corollary Murphys Law Any sufficiently advanced technology indistinguishable magic Just MaxSoar PC-Soar magic neither programs used NASA McDonnell-Douglas Boeing pro grams approximate aircraft performance un der certain conditions reasons aircraft still test flown realize programs iii same class n3odelers have access Cray superconiputer Lee Continued page 152 October 1989 149 WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance BALSA HOT LINE Call fSOAf 745 6394 10 am6 pm Central Time SFLYEIACH 48 3I32x12700 118s12775 363116x12625 471l4x12625 643/8x12725 61112x12900 LITEPLY48 GROOVED LGMOUNTS 12 Inch 36341840 36 34632140 123431646 WOULD YOU SAW HOLE IN THIS FUSELAGE Der Svitch direct replacement on-board on/off switch radio equipment hides inside fuselage activated outside included bar magnet vibration proof reliable submers ible consumes no power easy use install Ideal scale sport float planes boats sail planes helicopters Dont ugly up fuselage Der Svitch TO BATTERY DERSVITCHBAR MAGNET CHARO NC JACK ECEIVER P00 Peo two basic models Model 1401 comes connectors use old ones $1995 Model 1402 comes connectors Futaba J G Airtronics $2995 Both models include installation instructions bar magnet Optionally available Model 1405 LED $895 red LED lamp 20 leads indicates radio state can installed instrument panel realistic effect Order Include name address specify models needed include check money order send Ragan/Barker Group 5050 Quorum Drive #741 Dallas TX 75240 Please add $250 perorderto cover UPS charges &TX residents add sales tax credit card orders call between 900 500 central M-F Please allow 2-4 weeks delivery RC Soaring/Blakeslee Continued page 149 believe products provide useful tool Sailplane fliers What MaxSoar PC-Soar Based input 30 design measurements such wingspan chord airfoil etc programs cal culate following 23 aircraft design parameters Wing area equivalent dihedral aspcct ratio recommended dihedral average chord angle incidence aerodynamic center loading Horizontal tail area average chord aspect ra tio aerodynamic center longitudinal stability fac tor Vertical tail area average chord aspect ra tio aerodynamic center tail volume sideslip stability factor Miscellaneous forward CG limit rear CG limit aircraft neutral point online help MaxSoar provides ranges average values calculated values way added Jeffs urg ing earlier letter Its thing able calculate sideslip instability factor its another have guide what should table flight speed Reynolds number tal aircraft drag coefficient sink rate lift-todrag ratio about 10 coefficient lift values generated about 50 num bers table calculating involves hundreds calculations Generating table re quires accessing data file 40 50 numbers representing performance polar airfoil being considered Incidentally currently pro vide about 70 airfoil polar data files adding data become available programs plot values can quickly understood designer MaxSoar PC-Soar allow designer overlay several aircraft polars com parison makes simple observe ef fects design changes compare different de signs see effect ballasting design course can output printer documenting design process discussing others Lee did just dream calcula tions upwe simply automated equa tions available modelers because peo ple like Martin Simons Lynn Cromer Ren Van Putte Alex Strojnik Michael Selig Blame Beron-Rawdon others published books articles aerodynamics mod els Are works last word model de sign Absolutely provide excel lent start would like address Jeffs specific com plaints mentions changing dihedral angle 200 sweeping wing 300 perform ance polars changing correct made conscious decision during writing programs disregard reduction projected area due dihedral decision based fact reduction lifting sur face 15 percent 100 dihedral average dihedral rudder-controlled Glider area reduction aileron ship 30 dihedral less 015 percent ab surd 200 dihedral reduces area 60 per cent program does calculate outlined several recent articles MA equivalent dihe dral angle based dihedral information pro vided designer equations programs indi cate effect performance due wing sweep unless affects area wingspan chord maintained wing swept area remains constant does affect perform ance according equations used would effects local angle attack various wing sections due circulation ef fects other sections what magni tude effects might dont know Jeff knows Lee would interested hear ing Jeff did mention wing sweep well horizontal vertical tail sweep correctly taken account calculation aerody namic centers neutral point tail volume etc Jeff mentions individual building up whole folders design comparisons states evaluations meaningless individ ual beta tester MaxSoar program has flown Gliders 20 years has achieved LSF Level IV needs eight-hour Slope flight Level V has participated local regional contests Great Race LSF Nats has also flown F3B quarter-final level has spent last 10 years studying model aerodynamics compiling de tailed design information has performed field tests effects ballast sink rate flying speed gracious enough let Lee use notebook design information provided airfoil polar data use libraries Since calculating virtually same parameters MaxSoar provided good check code compiling design information hand took about 10 hours per model did calculate performance polars Much time spent checking math mistakes computers dont make Now MaxSoar takes about 30 minutes including performance polars Since has flown designs documented believe him says MaxSoars calculated performance corre lates well flight experience Gliders performed relative another crux issue designer needs basis comparing design versus another believe programs provide basis As can see times mentioned above programs provide 20-to- 1 reduction time required calculate simple design pa rameters let alone performance data takes about five months build Glider few hours front computer can keep building Glider going perform expectations consider time well spent thanks John Hohensee taking time write above letter New Soaring club George Voss wrote let us know Oklahoma City Silent Fliers club now operation Sailplaners Okie City area can get information George 1403 Lincolnshire Road Oklahoma City OK 73159 telephone 1-405/793-9213 RC Aerobatics/Van Putte Continued page 53 nation can deviate normal still able score Hanno makes style rather following hes World Champion STYLE PREFERENCE isnt exactly same what Ive talking about Im talk ing about guy wants see pattern flown particular way other styles will appreciated Everyone like some degree some us very bad about know local judge likes low fast Thats worth extra point maneuver isnt fair either its human nature very difficult counter try let affect score 152 Model Aviation Introducing Invisible SvitchTM Made USA
Edition: Model Aviation - 1989/10
Page Numbers: 48, 49, 50, 51, 149, 152
EXCITEMENT California being caused flying season Mark Allens new Falcon 880 de sign ship spans 112 has beautifully made Kevlar-reinforced fiberglass fuselage Se hg 3021 airfoil ailerons/flaps balsa-sheeted foam core wings modified Schuemann planform distinctive feature upswept wing tips outer 10 all-flying stab rudder built-up balsa construction Four servos wings ailerons flaps making computer radios like Airtronics Vision easiest way go Visions threeposition Launch/Cruise/Speed switch permits pre setting entire trailing edge three modes crow landing configuration flaps down 900 ailerons up 250 makes hitting spot much consistent regular fourchannel radio using Y connectors would fly Falcon youd give up nice mixing preset functions Falcon does incorporate thing overly unusual days However Mark seems have brought off perfect com bination model Sailplane design elements does Falcon look right its early com petition record quality workmanship kit making very hot ticket fact Marks problem has keeping up de mand asked Mark hed give us quick rundown what thinking about designed Falcon what said Falcon 880 designed give Thermal Duration pilot highest possible per formance versatility being difficult fly designed clean sheet paper New technology form Selig computerdesigned wind-tunnel-tested airfoils Schue mann wing planform theory F3B competition ex perience computer radio flexibility used achieve design goals Falcon Airfoils combination Selig 3021 3014 used because good lifting capa bilities thermaling speeds very low drag high speeds S-30 14 used tip elim inate tip stalling can problem swept-back tips Wing planform Wing vortex drag 50% total Sailplane drag thermaling speed Schuemann wing planform dramatically reduces drag thereby increasing L/D reducing sink rate better Thermal performance Upswept tips increase stability maximize Schuemann wing planform efficiency com petitors after seeing well Falcon flies have put type tip planes re port increase performance sta ble easier fly Sailplane am very interested continuing development tips would welcome comments persons have tried planes Overall size Much time spent computer determine optimum wingspan aspect ratio things such aspect ra tio vs Reynolds number wing strength over handling characteristics carefully ana lyzed result 112-in span 1425 pect ratio slightly smaller cur rent breed Unlimited Class Sailplanes fers advantages biggest advantages launching landing Most club winches used contests somewhat limited power line speed its smaller size overall low drag Falcon well matched winches can instantly accelerate top launch spectacular zoom Crisp aileron control stow speed big 9fl0 flaps opti mum size give Falcon unmatched landing ac curacy needed winning contests Drag Low overall drag achieved com bining very low-drag fuselage low-drag air foils gives Falcon 880 best L/D penetration Sailplane manufactured US Summary Falcon 880 offers competi tion highest performance versatility yet very easy forgiving fly Its low drag enables Falcon outlaunch outdistance competition searching lift Once lift 48 Model Aviation Radio Conoi Soaring Byron Blakeslee 3134 N Wlnnebago Dr Sedalla CO 80135 Flite Line Composites new Falcon 880 has phenomenal contest record California Wingspan 112 Byron has lot say about Glider months columnn Wing has upswept tips flaps ailerons Fuselage Keviar-reinforced fiberglass Photo below shows plane crow configuration fast descent flaps down 90 ailerons up about 250 Tom Rents daughter Sharla looks mighty happy hold dads modified Olympic 88 new wing designed built 25 MRCSS members used primarily high-tech replacement Olympic 650 Rake on-board ESYM expanded-scale voltmeter row 10 LEDs top th@ circuIt board light up sequence tell state charge receivers NiCd battery pack info column fpund thermals best As mentioned above Falcon very impressive contest record first half 89 Among notable showings wins Bob McGowan both Western States Cham pionships Modesto LSF/SBSS Nation als Morgan Hill CA second sixth NSS/TOSS Masters Contest Fred Weaver Bob McGowan first Hans Weiss Memorial Slope Race Daryl Perkins first third 60-plus-contestant North Coast Soaring League/SBSS March contest Bob Mark Personally Im very anxious try Falcon because looks like ideal ship new Sportsman Multi-Task SMT event fact entry RCSD Challenge rule SMT planes full details discussed minute weight limit 75 ounces stock Falcon weighs 60 65 oz giving about lO-oz/sq-ft wing loading could add 10-15 oz ballast Speed task mak ing loading respectable 123 oz/sq ft legal weight Going contest results Falcon able compete nicely Duration big boys Lovesongs Meteors etc So youd expect Falcon capable doing well threetask Duration Speed Distance SMT events very encouraging because think 112in-span plane makes handy size all-around Glider Its big enough perform well small enough too much handful espe cially windy weather Itll go up easily hi start fun flying also power-zoom off winches contests strictly Slope flying Mark Daryl com pletely cover Falcons wings 1 5-oz per sq yd Ed glass cloth use arrow-shaft hinges brings weight up 74 ounces can add up 25 lb lead move CG back 3/ ina condition Mark says itll really smoke Mark also said Michael Selig himself called order Falcon kit Mark asked Michael based recently completed Princeton wind tunnel tests would want different airfoils plane standard S-3021/3014 com bination Michael said No Sounds good enough mc Mark selling semikits consisting finished fiberglass fuselage fitted canopy foam cores full-size core beds plans about $115 complete kit adds balsa wing sheeting balsa sticks fiberglass cloth carbon fiber reinforcements wing hard ware sells $175 Both kits will cost few extra bucks shipping kit looks like itll build pretty fast especially wings vac mayor decals DECALS PRESSURE SENSITIVEWATER TRANSFER Over 750 Select *7 1/4 Scale18 Sheets * 60 Size38 Sheets * 40 Size38 Sheets * Propeller Decals . WT Only 6 Sheets3 sizes ea * Kill MerkingsWT Only6 Sheets * Nomenclature Markings 3 Sizes-12 Sheds Black White copy * Letters Numbers 1/4-3/8-I/2-5/8-3/4-7/512344-13116 10 colors See color chart * Flags. American United Kingdom Confederate * Stars 10 Colors 8 Sizes pias Sheet Assorted Sizes * Trim Sheets 4-3/4 26 10 Colors see color chart Authentic model insignias pressure sensitive %d r47e9 mater transfer 1/4 scale 40 end 60ckSS4decals size propeller decals World War II kill mark-major ings stars flags letters numbers trim sheets NORTHEAST SCREEN GRAPHICS 21 FISHER AVE. EAST LONGUEADOW MA 01028 TEL 413-525-4110 INJECTION MOLDED FUSELAGE WING STAB& FIN PREFORMED LANDING GEAR STEERABLE NOSE WHEEL NYLON MOTOR MOUNT& BEARING STEERING ARM HINGES PUSH RODS MISC HARDWARE VACUUM FORMED CLEAR CANOPY AND EXHAUST STACKS 3-4 CH WE INVITE DEALER INQUIRIES FOR INFORMATION CALL OR WRITE 0 7_ m C 0 E C E 2- C m C C I m m SUCKER-KIT.. $5995 VHS Show & Tell Video $3995 Add $400 shipping & handling Ml residents add 4% sales tax Send Si 00 SASE Icr product list Samples real wEd veneer skins Product List Includes flapless Arrow Shalt Hinges Carbon Tow Mylar Sheet High-Tech iems Dealer Inquires Welcome SEND CHECK DR MONEY ORDER TO PO Box 866 Lapeer Ml 48446 313 664-3330 October 1989 49 Another Great Twin AmDhlblan G & P SALES GRUMMAN ALBATROSS HU-16BCONSOLIDATED PBY-5A CATALINA 81 inch wing span e 810 sq inches 13 lbs 1 inchwingspannoo9sqincheaell lbs nTwin 40 2C engine size 5 FIberglass fuselage Foam Twin 30-40 engine size Fiberglass fuselage Vacuum wing stab cores Includes wood s Vac formedformed clear acatate cockpit blisters Vac formed cowls nacellesstyrene cowls end nacallas Preformed landing gear $25995 plus shipping tax applicableland operation Retractable wing floats Retractable landing gear ktt 85$23995 plus ahipping tax applicable 90 mInute VHS video buIldIng flyIng *246690 minute VHS video building flying .. *2488 G & P SALES 410 College Ave Angwin CA 94508 965-3866 SURE FLITE 40 Power 51 WINGSPAN AIRACOBRA SUPER FUN SCALE 40 SIZE WARBIRD FAST ASSEMBLY EASY TO FLY U SURE FLITE ENTERPRISES 23015 DEL LAGO DRIVE LAG UNAHILLS CA92553 714 855-4402 Composite Aircraft ENUn & Supply FAX 649780 TAIBI iCH3646___________3NCH3646 BALSA WOOD STICKS 1/16-INCH3645 1116111606 1/1603/3207 11161/80611 1/16o3/160913 1/161/41015 1/163/81317 1/1601/21620 1/163/42126 3/32-INCH3646 3/320 3/320811 3/3201/80913 3/3203/161015 3/32 o 1/41316 3/3203/61419 3/32 0 1/21621 3/32 0 3/42431 Double Balsa Wood Prrces Spruce Bauuaood OScirs 1/8e 1/80811 1/603/161115 1/801/41317 1/803/61621 1/80 1/21724 1/60 3/42533 3/1 6-INCH3648 3/16 03/161317 3/160 1/41419 3/16 o 3/81821 3/160 1/21825 3/160 3/42838 1/4-INCH3648 1/4 0 1/41621 1/403/81825 1/40 1/22129 1/403/43142 5/16-INCH3646 5/1605/162027 5/16 o 3/82230 5/16 o 1/22736 5/16 o 3/43952 3/6-INCH3646 3/8 0 3/82737 3/80 1/23041 3/8 o 3/44460 1/2-INCH3648 1/20 1/23749 1/203/45270 TRIANGULAR CUT BALSA 1/4 0 1/40 3624 3/803/803629 1/201/203837 3/403/403647 10103661 BALSA PLANKS 3/403038178 102036164 103036230 104036303 202036230 203038329 2u4o36464 303038490 304036680 BALSA SHEETS 1-INCH3648 1/180 12736 3/32 13040 1/8e13344 3/18013749 1/4014157 3/8 015372 1/2018588 2-INCH3648 1/32023040 1/16 023648 3/32 0 24154 1/8e24660 3/180 25472 1/4e26384 3/60277103 1/202113150 1/32034053 1/16034358 3/32 0 35270 1/80 36080 3/16 037295 1/4 o 384112 5/1803103134 3/903120180 1/203150200 4-INCH3648 1/32046587 1/180473101 3/320482109 1/80495126 3/1804114151 1/404131193 3/804182271 1/204219325 BIRCH PLY WOOD 1/840 120 12175 1/640 120 24350 1/64o 12 48700 1/840480482800 1/32o6u1252 1/32u120 10105 1/32 012o 24210 1/32012049420 1/160801252 1/160120 12105 1/16 0120 24210 1/16012048420 3/32u6o1291 3/330120 12183 3/32 012u 24328 3/32u12048852 1/8060 1289 1/80 120 12178 1/8 12 24356 1/8o12o48712 3/160601274 3/16 012o 12146 3/16012024293 3/18012048595 Superior Aircraft Materials 1/40801274 1/40120 12146 1/4 0120 24293 1/4 012048085 3/80 120 12150 3/8 0 12 0 24360 3/8 0 12 48720 1/20120 12202 1/2012024405 1/2012048808 LITE PLYWOOD 1/801201258 1/6 0 12 024112 1/6 0 12 048224 TAPERED TRAILING EDGE3646 1/8o 1/22230 3/16 0 3/42940 1/4 e 14255 5/180 14481 3/60 1/a5272 12020-G Centralia iian Gardens California 90716 865-3220 Handling Charge $5-OG $300 COD mum Order $2000 FOB Factory accept Personal Checks COD fornia Residents add 6% Sales Tax uum bagged Contact Mark Allen exact price deliv ery info Flite Lite Composites PO Box 1493 Windsor CA 95492 telephone 1-707/8383390 Oly 88 project Tom Rent treasurer newsletter editor Minnesota R/C Soaring Society sent interesting letter club recently designed alternate wing Airtronics Olympic 650 kit can tach existing 650 fuselages wing modern design combining Selig 3021 airfoil sheeted foam cores ailerons spoilers uses straight dihedral can built one-piece two-piece wing attaches top 650 fuselage elastic bands -MRCSS kitted over 25 wings November sold quickly within club $10 kit included cores plans sheeting control cables root ribs joiner rod/brass tubes control horns committee mem bers designed built wing under expert guidance Bob Scaly named plane Oly 88 year conceived Several Oly 88s have competed first few contests 89 season good results against Prodigies Sagitta 600s Gnomes project helped members experi ence modern composite construction techniques migration ailerons advancing effi cient airfoils very pleased re suits Unfortunately club wont manufac turing kits However article Oly 88 may submitted MA later year magazine buys plans would avail able through MA s Full-Size Plan service Well see Enclosed photo daughter Sharla age four years proudly holding Oly 88 opted use plug-in arrangement Oly 88 wing modified tail feathers match shape wing model has 72-in span 619 sq area weighs 35 oz flies great both Slope Thermaling Thanks very much story photo Tom excellent example club members can get together work project benefits everyone especially stepping up poly ships ailerons though MRCSS wont making wing kits perhaps Bob Sealy could convinced cut some cores Maybe Toms Oly 88 started life Oly 650 sure doesnt look like now Quite nice looker both daughter Sharla plane Another lesson Oly 88 project start something flies well make demon tweaks friend Randy Reynolds calls have good chance success Modelers temperament born tinkerers Id bet us has ever built kit exactly supposed con structed know can improve de sign Go aheadhave fun Thats what Soar ing hobby about Roke onboard ESYM Roland Kern maker Roke line beautiful Scale Sailpianes Germany has come out important item insurance plane As can see photo its little electronic gadget row 10 mini-LED lamps across top two left red next two yellow six right green wire up Roke Expanded Scale Volt Meter pig tail suit radio plug unused receiver servo socket Assuming fully charged battery pack turn receiver switch lamps will consecutively flash starting left set tle down green lamps right illuminated what reading green lamp farthest right indicates 51 volts next 50 volts etc Sometimes two adjacent lamps will indicating voltage tween two values Make sketch 10 lamps Count off tenths volt youll see leftmost green lamp indicates 46 volts low re ceiver pack can safely used two yellow lamps indicate 45 44 volts R L about lowest voltage will drive servos red lamps indicate 43 42 volts definitely crash time really neat thing about onboard ESVM reads actual voltage pack onHERES UNIQUE TIME PIECE THAT FEATURES FAMILIAR FACE THE ALTIMETER WALL CLOCK Perfect den office Quality quartz movement Full 1 year warranty Four other models available Horizon cIock DG clock VOR clock & Airspeed thermometer DEALER ENQUIRIES WELCOME SEND CHEQUE OR MONEY ORDER FOR $3996 UPS T& AIRUNE SUPPLY CO 98-116 PINELLAS BAYWAY TIERRA VERDE FLORIDA 33715 TO ORDER TOLL FREE 1-800-848-2739 FLORIDA RESIDENTS ADD 6% SALES TAX 50 Model Aviation Last Call Module 7SP ATRCS retro-fit program will end Iecember 311989 sure get conversion soon ATRCSTM Advanced Technology Radio Control System Converts Module 75P advanced computerized control system Stores four aircraft setups Includes seven different servo configurations Individual surface travel limits centering Single switch presets launch speed modes Full trailing edge control Enhanced mixing functions Crow landing capability User selectable cross trim capability Flap stick reversing Elevator camber VTR Automatic selection high ail rudder mixing launch landing modes Fully installed kit year limited warranty Control Systems Laboratories 238 5 Hillview Dr Milpitas CA 95035 408 946-4142 Airtroni~ Module 75P registered trademarks Airtroni Inc der actual loads say turn re ceiver switch 50-volt lamp lights up indicates voltage fully charged pack under minimal load ie receiver servos idling Current draw may 50 100 mA depending type re cetver Now turn transmitter stir sticks around servos may drawing high peak amperage total actual load pack could up around /2 1 ampere load voltage will drop two three tenths volt can actually see whats happening lighting up lamps lefi indicating 50 volts stop moving sticks 50-volt lamp should come back worst things can happen Glider have bad servo binding con trol surface puts too great load servo Either case results excessive current draw can quickly run down pack can get indication problem like ing far down green lamps light up work transmitter sticks Itll take some experience Roke ESVM before feel confident about lamp lit versus ining flying time Re member four-cell Ni-Cd receiver packs have relatively flat discharge curve down 44 volts Below curve falls off shelf Probably short flight should attempted voltage down 47-volt lamp can get Roke ESVM Roke im porter Tony Arnoux Imports Inc 1744 NW 82nd Ave Miami FL 33126 price $25 postpaid people flying Scale planes costing $1000 extra $25 certainly worth peace mind Come think plane doesnt have cost much make onboard ESVM worth correspond Tony might want ask him about Wik Rowing other German Scale ships now bringing Sportsman F3B update As youve probably heard quite few us sportsman fliers very excited about trying new eventwhich might better called Sportsman Multi-Task Soar ing SMTNo SMUT idea fly simplified Duration Distance Speed tasks similar F3B big using Sailplanes considerably tamer real F3B planes fliers have indicated desire partici pate contests bit challenging straight Thermal Duration strict F3B rules What talking about mid dleground Soaring Randy Reynolds dis cussed February column Take another look dont remember Sailplaners Ive talked about SMT just about have strong reactionsboth pro conbut mostly very positive makes think may something good Jim Gray publisher R/C Soaring Digest took bull horns said OK lets have RCSD Challenge Design Competition select example competitive Sportsman Multi-Task Glider lets recommend rules planes contest tasks clubs around country can run more-or-less similar SMT events Challenge Rules commit tee turned out Jim John Dvorak Don Edberg Gus Peleuses Randy Reynolds self vote rules planes tasks completed June RCSD Challenge win ning plane selected July Ill have give outcome next month since Im writing June what committee voted recom mend SMT rules PlanesOnly rule 75-oz maximum total weight including ballast As long planes weight below 75 oz anything else OK No restrictions span wing loading kit cost con struction materials controls radios original de signs builder model etc Tasks Duration using Percentage Slot system same new F3J International Thermal Dura tion task F3B landing tape recommended Dis tance using AMA Distance Task T7 per rule book page 93 Speed using AMA Speed Task T8 per rule book page 93 safety lineexcept recommend flier get two tries back-to-back better time counted Continued page 149 AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 Z ber 1989 51 1ursu 1i iou 1111 mrii A SHEETS 36 45 30 1 162 33 3322 40 162 43 3162 49 14 2 56 1 323 37 1 203 37 1 163 32 49 31 3323 44 56 37 18 3 54 71 46 3163 62 62 55 143 73 95 61 5163 85110 36 3 66124 71 123110155 34 3165191 1164 56 7646 3324 20 84 56 16 4 6010666 3164 93122 75 14 411013464 36 4165220139 2 4225261 MATCHED SHEETS 42 3324100 154106 3164120 144131 BALSA STICKS 3648 1161409 1163610 161214 332 1410 332 3812 332 1216 18 1606 16141116 18 361216 16 121024 3163161116 316 361720 316 122230 14 141624 14 391926 4122130 14343444 14 14055 5165162126 36 362737 39 123246 36 344255 36 15270 12123653 12344062 12 15876 56 584665 34 346790 * LIGHT46 LB BALSA TRIANGLES36 WOOD36 25353 68300353 356353 45363 558 3 669 BALSA PLANKS364 304 65822 5056 00242 14z6013335 1123275116463 11243603324100 22225164115 233253164133 24435144156 33495364236 34666124322 TAPERED SHEETS36 14265 14365 36266 36396 123120 LONE STAREPOXY SoLol695 696 10,598 30o,o596 TRAILING EDGE 36 14132 S161 1439 3611246 122~70 INSTANT GLUE 1 0 Thck 296 1 0 Tloo 296 2, TSck 550 2o 15n 550 must try 4-6 lb balsa BASSWOOD48 31631626 3161435 31631636 3161246 3163465 11411442 1431649 143460 36 3660 361270 3163490 121290 1234100 BUNDLE DEALS 301116336699 201164361035 20332 60 15332436955 1516336735 10116436695 16316336920 153164 36635 1014 336655 10-14436930 1036336670 53164 5 512336540 61124361060 15332446665 616446500 6316446600 614446645 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 116 1161725 16 142026 16 382232 3163162636 114 143450 14 364055 1141124565 316s 364966 36 126077 12 1126666 1125347567 SPRUCE TRIANGLES 316 316 1212 34 IStS175 1I8x12350 ______________ __________________ 114s6 275 LONE STAR MODELS 1623 57th Se Lubbock TX 79412 Cant 48 Handling Charge pay UPS Add $300 COD $400 extra PP APO FPO Stases accept Vise MasterCard personal checks COD 6/ % tax Texas US currency Minimum Wood Order $1000 SAm53 HARD MAPLE 1 4 36 3636 36 1 2 3l6 34 1234 18 40 46 50 66 66 BIRCH DOWELS36 16 39 31611 1414 51625 3832 3PLYBIRCII 48 1164x12835 1132x12475 1116x12475 1I8x12495 RC Soaring/Blakeslee Continued page 51 Note tasks use working prep aration time CD assembles flight group everybody ready says Go No relaunches allowed except case winch organizer timer flagger failure An ideal SMT contest would have equal num bers of three tasks CDs en couraged mix-n-match listed tasks wish use other tasks option exam ple contest could three rounds Duration two Distanceor combination tasks task normalized 1000 points contest points simply sum task points Duration Distance flown man-on-man except contest too small fewer say nine entrants mix up flight groups Club winches can used should about equal power contestants own winch can used available about same power other winches Ballast can added removed time long total weight does exceed 75 oz As hero Al Doig would say Howzat realize number folks out readerland responding Terrific may vast Its fact bulk Glider guiders US sport flying Gentle Ladys Oly tls such smaller group Sailplaners enjoy contest flying maybe quar ter half will actually give SMT try Perhaps SMT will go way F3B ie enough fliers get interested develop necessary critical mass start chain reaction However Im hoping SMT will have broader appeal because its much easier Sportsman-level fliers get simpler clubs run Itll take few promoters club get ball rolling Once people find out exciting much fun Distance Speed tasks fly SMT could really take off As MA Soaring correspondent feel duty point out kicks satisfaction can experience moving up caliber planes Taking analogy full-size Soaring its similar advancing primary trainer like Schweizer 2-22 intermediate ship such Schweizer 1-35 finally glass racing beauty like Schempp-Hirth Discus 2-22 pi lot perfectly happy just being up air once tries l-35 knows hes faster responsive ship Its higher performance pro vides Soaring enjoyment Discus other step up ladder imagine its tough go back once youve flown Same thing models myself Im very excited about possibil ities Sportsman Multi-Task 75-oz rule easy fliers understand easy CDs administer specifically chosen keep planes being intimidating Sportsmanlevel pilots Lots good kit designs fill bill design own Pilots can get started what theyve got because just about Standard Class planes weight under 75 oz Planes will course vary sophistication pilot does well SMT will knows plane practices lot Also hop ing come up easy system placing SMT pilots Novice Intermediate Ex pert classes beginners will feel less trepi dation about flying experienced guys Contests dont have contests Clubs can schedule SMT Sessions just run Distance Speed tasks guarantee practic ing tasks will improve flying skills theyre fun boot Ill bet once 3U ex perience thrill racing neck-and-neck Distance task youll decide need faster plane Please let know what think magical design programs fol lowing letter John Hohensee pretty much clears up controversy over Johns com puter design program MaxSoar Its also very structive what MaxSoar Lee Murrays PC-Soar about John also wants let know new address S22 W27400 Fen way Drive Waukesha WI 53l88 telephone 4l4/52l-2472 Jeff Raskin correct says pro grams magical However think boo-boo can attributed excitenlent see ing useful new technology being made available modelers just got back National Computer Graphics Association convention sessions speaker showed slide think applies read Corollary Murphys Law Any sufficiently advanced technology indistinguishable magic Just MaxSoar PC-Soar magic neither programs used NASA McDonnell-Douglas Boeing pro grams approximate aircraft performance un der certain conditions reasons aircraft still test flown realize programs iii same class n3odelers have access Cray superconiputer Lee Continued page 152 October 1989 149 WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance BALSA HOT LINE Call fSOAf 745 6394 10 am6 pm Central Time SFLYEIACH 48 3I32x12700 118s12775 363116x12625 471l4x12625 643/8x12725 61112x12900 LITEPLY48 GROOVED LGMOUNTS 12 Inch 36341840 36 34632140 123431646 WOULD YOU SAW HOLE IN THIS FUSELAGE Der Svitch direct replacement on-board on/off switch radio equipment hides inside fuselage activated outside included bar magnet vibration proof reliable submers ible consumes no power easy use install Ideal scale sport float planes boats sail planes helicopters Dont ugly up fuselage Der Svitch TO BATTERY DERSVITCHBAR MAGNET CHARO NC JACK ECEIVER P00 Peo two basic models Model 1401 comes connectors use old ones $1995 Model 1402 comes connectors Futaba J G Airtronics $2995 Both models include installation instructions bar magnet Optionally available Model 1405 LED $895 red LED lamp 20 leads indicates radio state can installed instrument panel realistic effect Order Include name address specify models needed include check money order send Ragan/Barker Group 5050 Quorum Drive #741 Dallas TX 75240 Please add $250 perorderto cover UPS charges &TX residents add sales tax credit card orders call between 900 500 central M-F Please allow 2-4 weeks delivery RC Soaring/Blakeslee Continued page 149 believe products provide useful tool Sailplane fliers What MaxSoar PC-Soar Based input 30 design measurements such wingspan chord airfoil etc programs cal culate following 23 aircraft design parameters Wing area equivalent dihedral aspcct ratio recommended dihedral average chord angle incidence aerodynamic center loading Horizontal tail area average chord aspect ra tio aerodynamic center longitudinal stability fac tor Vertical tail area average chord aspect ra tio aerodynamic center tail volume sideslip stability factor Miscellaneous forward CG limit rear CG limit aircraft neutral point online help MaxSoar provides ranges average values calculated values way added Jeffs urg ing earlier letter Its thing able calculate sideslip instability factor its another have guide what should table flight speed Reynolds number tal aircraft drag coefficient sink rate lift-todrag ratio about 10 coefficient lift values generated about 50 num bers table calculating involves hundreds calculations Generating table re quires accessing data file 40 50 numbers representing performance polar airfoil being considered Incidentally currently pro vide about 70 airfoil polar data files adding data become available programs plot values can quickly understood designer MaxSoar PC-Soar allow designer overlay several aircraft polars com parison makes simple observe ef fects design changes compare different de signs see effect ballasting design course can output printer documenting design process discussing others Lee did just dream calcula tions upwe simply automated equa tions available modelers because peo ple like Martin Simons Lynn Cromer Ren Van Putte Alex Strojnik Michael Selig Blame Beron-Rawdon others published books articles aerodynamics mod els Are works last word model de sign Absolutely provide excel lent start would like address Jeffs specific com plaints mentions changing dihedral angle 200 sweeping wing 300 perform ance polars changing correct made conscious decision during writing programs disregard reduction projected area due dihedral decision based fact reduction lifting sur face 15 percent 100 dihedral average dihedral rudder-controlled Glider area reduction aileron ship 30 dihedral less 015 percent ab surd 200 dihedral reduces area 60 per cent program does calculate outlined several recent articles MA equivalent dihe dral angle based dihedral information pro vided designer equations programs indi cate effect performance due wing sweep unless affects area wingspan chord maintained wing swept area remains constant does affect perform ance according equations used would effects local angle attack various wing sections due circulation ef fects other sections what magni tude effects might dont know Jeff knows Lee would interested hear ing Jeff did mention wing sweep well horizontal vertical tail sweep correctly taken account calculation aerody namic centers neutral point tail volume etc Jeff mentions individual building up whole folders design comparisons states evaluations meaningless individ ual beta tester MaxSoar program has flown Gliders 20 years has achieved LSF Level IV needs eight-hour Slope flight Level V has participated local regional contests Great Race LSF Nats has also flown F3B quarter-final level has spent last 10 years studying model aerodynamics compiling de tailed design information has performed field tests effects ballast sink rate flying speed gracious enough let Lee use notebook design information provided airfoil polar data use libraries Since calculating virtually same parameters MaxSoar provided good check code compiling design information hand took about 10 hours per model did calculate performance polars Much time spent checking math mistakes computers dont make Now MaxSoar takes about 30 minutes including performance polars Since has flown designs documented believe him says MaxSoars calculated performance corre lates well flight experience Gliders performed relative another crux issue designer needs basis comparing design versus another believe programs provide basis As can see times mentioned above programs provide 20-to- 1 reduction time required calculate simple design pa rameters let alone performance data takes about five months build Glider few hours front computer can keep building Glider going perform expectations consider time well spent thanks John Hohensee taking time write above letter New Soaring club George Voss wrote let us know Oklahoma City Silent Fliers club now operation Sailplaners Okie City area can get information George 1403 Lincolnshire Road Oklahoma City OK 73159 telephone 1-405/793-9213 RC Aerobatics/Van Putte Continued page 53 nation can deviate normal still able score Hanno makes style rather following hes World Champion STYLE PREFERENCE isnt exactly same what Ive talking about Im talk ing about guy wants see pattern flown particular way other styles will appreciated Everyone like some degree some us very bad about know local judge likes low fast Thats worth extra point maneuver isnt fair either its human nature very difficult counter try let affect score 152 Model Aviation Introducing Invisible SvitchTM Made USA