e Stoy poses two Wasps flown T9 Nats Mike came second ravity Powered Free FlightTeamMike stan Stoy Bob Hayes Jr won National OHLG Team Challenge Photo Jim Raeder others author High-time winner Outdoor l-tLGliderat last years National Contest design can built specialized materials Author includes bushel good advice about planning training winning contests should know. hes won plentyOMike Stoy IN OUTDOOR Hand-Launched Glider compe tition consistency name game Wasp VI due its large size careful selection moments offers superb consistency thermaling ability nearly impossible beat planes contest performance impressive kinds weatherfrom light lift calm winds high winds super booming thermals people idea built-up Hand Launched Glider may seem like too much un necessary complication sport model probably true competition design concept offers several advantages major difference wing loading can achieved built-up structure real importance produces super-light airplane since too light plane impossible throw can build light planes less-thanlight wood Getting piece good C-grain wood 8-to 10-lb range lot easier finding same type wood 4- 6-lb range heavier wood also less likely contain wind checks will weaken light stuff using right weight wood built-up structure can produce plane lighter same plane built super-light piece wood solid wing no sacrifice strength design beginners model Its complexity makes bad choice anything other contest performance its large size requires fairly good throwing arm achieve reasonable altitude top-notch contest design looking plane will fill bill Construction Wood selection Wasp VI critical competition designs wing wood should C-grain 8 10 lb per cubic foot density preferable lighter strictly dead-air planes Both stabilizer rudder should 6- 8-lb B- C-grain wood fuselage should springy straight-grain spruce cant obtain wide enough piece wood wing can splice two narrower pieces True up edges joined straightedge razor blade Hold edges firmly together work board tape few strips masking tape perpendicular joint followed long strip 1-in masking tape running length jointon same side earlier strips Now flip wood over fold open along joint Run some white glue length joint lay wood flat work board masking tape side down Weight wood some dope bottles other weights wipe off glue squeezes out Let glue dry remove tape will have piece wide wood Begin cutting Out wing Splice spruce leading edge wing after soaking hot water few minutes Use masking tape pins hold place spruce will bend easier breaking pull firmly August 1981 57 keep tension bend around tip Plane wing rough airfoil shape sharp razor plane Follow sandpaper working 80 grit down 400 grit Form airfoil wing just building solid wing have finished sanding wing Cut out holes panels operation cutting square hole razor blade easiest method Cut dihedral breaks bevel dihedral angles Cut spar slot main panels note actually involves removing 1 / 16 wood main panels otherwise will match tips should pay particular atten tion getting slot vertical Cut out plywood spars check fit before gluing place Glue spars first glue ribs easiest way make ribs cut out rectangles 1/16 balsa rather cutting out airfoil shapes glue Sand airfoil ribs after place glue has dried Glue dihedral joints check lateral balance wing sand heavy tip until wing balanced Dope sand wing before covering tissue Using bright colored tissue wings will make plane easier spot lands Give wings several coats dope tissue necessary maintain strength wing using enough dope can let tissue sag reducing wings strength well-doped wing will also reduce chance wing warping will change trim Cut fuselage wing hold-down piece spruce Dont omit wing hold-down adds considerably strength fuselageto-wing joint major trouble spot some modelers Cut out sand stabilizer rudder Cut dethermalizerDT break line stabilizer round edges joint Tape stab back together drill holes thread hinges Sew hinges figure-eight pattern giving about three passes hinge Use ordinary sewing thread hinges Dont forget take tape off stab glue ends thread finish Attach stabilizer rudder fuselage being careful get alignment correct Again watching alignment glue wing wing hold-down finger grip Prepare hardware DT system install shown plans photos couple things watch installing DT system Dont use cyanoacry late glue hold DT line rear stab cyanoacrylate soaks thread stiffens short distance knot stiffened thread can hang up rear DT guide loop stop tail popping up Second gluing plywood stop top stab make sure room DT rubberband clear rudder stab pops up can also cause system fail crack rear rudder Trimming flying Bring glider balance CG epoxying piece lead nose filing away lead until glider balances fore-aft point shown plans Check plane over thoroughly warps head out flying field trimming procedure follows test glide plane until smooth glide obtained left-hand 58 Model Aviation After cutting rectangular W, .u true uurnurs re rounuea power sooi makes mis easy wing ribs cut 1/16 x p stock glued place cyanoacrylate Wing ribs trimmed glued place Sand airfoil ribs glue dries Tfle wasp uses pop-up aemnermallzer ace mne text mor details make thread hinges FULL-SIZE PLANS AVAILABLE . SEE PAGE 132 TIP LE LAMINATED I/16X I/H SPNIJCE WINS THICKNESS TAPERS FROM I/H AT CENTER TO I/IA AT TIP 116 BALSA RIBS II=ll GLB 1/4 C DRAIN BALSAtill. TISSUE COVEREDIll) 6 SPAR B SD SPRUCE E I/H BALSA FINGER REST LEWD NOSE WEIGRY FRONT 1/4 SIZE 5/B I/H TOP FIUDRE B TRREAO HINUESITYPI STABILIZER U LU I/IA B URAIN BALSA ST WARE GB WIRE 5 ROSA DI WIRE LINE GUIDES F1 WIRE ST HOOK CUT DOWN PIN 1/32 PLYWOOD STAB STOP I/H AWBINUM SMJFFER TORE US LB DACRON FISIIINO LINE ALUMINUM FOIL I/U SPRUCE WING ROLD DOWN LII CU FUSELAGE 4/B S S/4 SPRUCE -I WIRES NOOKWIRE UDIDE 'SANDPAPER FINGER URIP CUT DOWN PINST LINE ITO TAIL SIDE RUDDERPLO STAB STOP B LU 1/16 B GRAIN BALSA UT RUBBER BAND WIRE UT HOORIt, ST LINE ITO WIRE USISE circle about 50 60 feet diameter Adjust plane smooth launch transition warping aerodynamic surfaces required smooth launch transition achieved fine-trim glide moving CG position making initial flights throw about 60% power 450 angle slight right bank Once plane flying satisfaction work up about 90% power bring launch angle down 1Oo2Oo Throwing full power very close little risky accuracy decreases near full power results badly blown launches something cant afford contest Work outs practicing competing Handlaunched Glider flying largely athletic event Although can overcome some deficien cies throwing arm no will argue fact having good ann improves chances winning otthe best exercises br HLG throwing softball tennis ball cant find someone else throw find brick wall throw against few weeks before contest work doing large number repetitions about r Four five days before contest begin decreasing number throws increasing power until reach full power two days before day before contest few light throws loosen up dont heavy workout day contest dont throw gliders until after have loosened up Unquestionably best single way get shape contest practice improves shape ann importantly will make familar planes Consistency key must know exactly plane performs conditions means practicing windy days well dead air evening cant expect win outdoor contests getting thermals yet am continuaily amazed number people have never practiced picking air contest no place find out plane wont hold lift So practice picking Continued page 127 stan Toy iauncnes pracsce SIUIO NJflL1 athletic event author describes successful training regimen article August 1981 59 I4LUis Thike Stoj WINU SPAN SD INCHES WING AREA 7725 SD INCHES TOTAL WEIURT DES DRABSI35R OUNCES AIRFOIL FLAT BOTTOM1 54% RIUR POINT AT 27% OF CORD STAB UREA 22% OF WIND RUDDER AREA 5% OF WIND INCHES I/S I53DRAWN BY MIKE STOY S-ID75 SNUFFER TUBE ST RUBBER SAND ST FUSE ALUMINUM FOIL .alizer rubberband cut ballOonmore cOnsistent AE ROTRENDS LATEST NEW CREAM Tuned Pipe Coupler high-nitro appli cations Tested proven over 60% nitro closed canopy applications Super heat resistant MUST FOR RC BOATERS SIZES 1/2 ID x 5/32 waIl 5/8 ID x 5/32 waIl 3/4 ID x 3/16 wall 7/8 ID x 1/4 wall 1/2 ID x 5/32 waIl 5/8 ID x 5/32 wall 3/4 ID x 3/16 wall 7/8 ID x 1/4 waIl LENGTH 3 3 3 3 12 12 12 12 ULTRA BLUE Tuned Pipe Coupler Still best value general applica tions 5% nitro Available 1/2 5/8 & 3/4 ID 4 & 12 lengths LIST PRICE $199 229 329 499 795 895 1295 1895 Tuned Pipe COUPLER CLAMPSI Best method connecting tuned pipe couplers Will conduct heat like metal clamps ULTRA BLUE Tuned Pipe Coupler M IN /MAX 7/16 1/2 5/8 23/32 47/64 53/64 55/64 15/16 63/64 1-1/8 11/8 1-7/32 AMT 2/pkg 2/pkg 2/pkg 2/pkg 2/pkg 2/pkg FOR Exhaust Exhau St Most 20s Most 40s Most 60s Most 80s LIST PRICE $159 159 159 159 159 159 Send self-addressed Stamped envelope FREE catalog DEALER INQUIRY INVITED 7/El 0/REND PRODUCTS 44 West Prospect Street New Haven CT 06515 203 397 3755 Guardian fuel tank access Marc Warwa shanas Loire-Nieuport 42 uses single long hatch access throttle tank bellcrank arrangement possible because aft location belicrank particular model Blackburn Firecrest built Leon Ryktarsyk uses separate hatches engine tank access control system installed wing limited access possible after tank removal end result case model can accept changes repairs fuel system throttle control system damag ing model An added benefit ability inspect components correct problems early stage before cause loss score loss airplane art landing two official flights landing score amounting about 40% flight score landing important two factors important success ful landing first getting airplane deck within arresting area second getting hook engage arresting line stop airplane Assuming hook properly constructed adjusted see June column type approach holds secret success Getting plane deck arresting area takes bit practice since different type landing normal type CL modelers used Soft gentle landings must take second place precision landings latter little harder landing area 20 ft long model needs half three-quarters second pass com pletely over two ways land Carrier model illustrated photos accompanying article best way far achieve desired result approach deck level flight about 5-ft altitude point about 20 ft stern deck deck comes clearly view begin smooth descent will cause model hit deck about 8 10 ft past stern fourth fifth arresting line rate ofdescent landing loads equivalent dropping model onto its gear height about 12 model will land near-level attitude normal arrested landing almost certainty alternative landing nique fly over deck apply down elevator dive landing areareminiscent Kamikaze attack Such approaches familiar us doubt Carrier flier anywhere hasnt attempted natural reaction approach made too high fear losing five points missed landing approach overrides reason thought going around another approach disappears entirely usual result loss 50 100 points rather five would have resulted going around problem Kamikaze method the%tail last thing hit deck hook often doesnt get chance its job usual result prop shaft what left broken propeller badly deflected landing gear forced under arresting line model either stops its nose 50 points likely flipped its back 25 points model should end up its gear chance hook catching line reduced because severe bouncing results engine will have stopped go around impossible 0 points Patience key Success trophies usually go flier abandons bad approach necessary takes much certain 95-point landing next lap landing photos Bill Rutledges STOL Bearcat 1978 Nats good landing placed first Junior Profile RichardL Periy 416 WoodhillDrive Golds boro NC 27530 Wasp VI/Stoy Continued page 59 air get planes trimmed riding thermals different ways picking air contest Some common ones piggybacking thermal poles streamers bubbles cattails three systems rLiqhr 4ft 6edeI4611 $9900 DELIVERED VISA Four Folding Legs Wing lage Holders Add $400 Shipping Calif 8% Tax RAC Products408 274-1915 3200 Knightnwood Way S San Jose CA 95148 August1981 127 K FifE FANUS TIC NELSON 15 detailed brochure send 25 cents Kus torn Kraftsmanship PO Box 2699 Laguna Hills CA 92653 Ph 714 830-5162 Dealer inquiries invited IN STOCK FOR IMMEDIATE SHIPMENT New SUPER QUADRA $8995 BRISIGHELLA FLYWHEEL $10695 QUADRA REPAIR$1000 s KIORITZ engine 244 culn$18995 Jim Messers ERCOUPE KIT$21995 Jim Messers TOMAHAWK KIT$23995 Concepts BIG FLEET KIT $17995 P&W RADIAL ENGINES Fleet $2995 FIBERGLASS COWL Fleet$1995 BALSA & BASSWOOD sIzes 40% OFF /a SCALE plans QUADRA ERCOUPE TOMAHAWK SKYBOLT$2195 SUPER STEARMAN Godfrey$2495 STARDUSTER TOO C Brislghella $2995 COCKPIT KITS Ercoupe T-Hawk $1500 Stearman Fleet F4U J-3 Cub$1850 ME-log $1950 Citabrla Nosen $2495 24-Hour Service - Add $2SO postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706 Outstanding Big Scale Aerobatics * % STAND OFF SCALE SIZE * 92 WINGSPAN 1509 SQ IN * WEIGHT 19 21 LBS * FIBERGLAS COWL & WHEELPANTS * QUADRA ENGINE * AVAILABLE NOW * PRE $189 bh. BABE really BIG Wing span 53Area 464 sq Engine 30-40Radio 4-channel Send 60f literature other kits & accessories has advantages disadvantages Piggybacking tells exactly ther mal strong However requires run under plane going piggyback can quite feat windy day means frequently launch down wind plane goes out timers sight sooner Piggybacking also results quite few badly blown launches flier off balance hurry hasnt set himself properly launchas demonstrated 1978 Nats Bob Boyerwhowonthe event missed sixth max national record after running under another thermaling glider have bad launch Another problem piggy backing isnt always someone else air ready fly Thermal poles streamers allow stand place set up launch lessens problem bad launches Poles also eliminate need someone else air fly big disadvantage stream ers tell exactly thermal centered less indication strong using two poles can lessen problem somewhat big advan tage poles over bubbles poles work well windy days dont indicate very light lift Bubbles cattails show thermal fast going up also allow set up place prior launching dont require other planes air biggest disadvantage windy days bubbles break up blown ground system use isnt important knowing use well get contest again means going out setting up equipment getting someone else fly ATTENTION ERS 128 Model Aviation product review product review product review Unless have three hands Panavises Model 350 multi-purposeworkcenterisa alluring product gives Stand ard Base Model 300 tilts turns rotates desired work position Tray Base Mount Model 312 six individual trays hold small parts tools right want Self-Centering Extra Wide Opening Head Model 376 allows work objects up to9 in size well tiny hard-tohold things Panavise says Model 350 will find million uses workbench least Its ingenious product review product review product review AVAILABLE NOWtWoo UPF 7 SO-Arpo$2395 JB spoolal MK III 54 Mono 78 Sips Weight iSbn 2195 TsnI Air 2000 105 Clamrc Scele Bplone 23 lbs 2295 TnM 4000 99 Rodrel Eng Cloosic Sips 23 Sn 2295 Fnkkes DVII 55 Geoon WW Frghte ape 23 lbs 2495 Coming 5non Oopmth Pop 50 5rpe Sopscoh Ttipehoond 50 Toplano Woco ATO Lyjook VeoOo 90 Srplaoe Neoport 11 gebe 55 5pleno 35 Ocoln Fobbe 081 72 Triplono Plans shipped U PS Pairel Post Please add $300 postage handlino fastest service send pOstoi money order No C LID orders sent BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 212 337-6987 goat flights you practlce trimming plane contest should mentioned earlier check pattern different weather conditions particularly thermals big problem trimming large thermals some planes will spin Out single best remedy washin inboard tip twisting leading edge upward respect trailing edge trimming plane try get transitlon come out directly over head plane pointed wind flying crosswind downwind transition will put plane out timers sight sooneras well causing glider come out downwind thermaL Knowing exactly plane transitions important plan piggyback throw rising bubbles Another thing check trim plane DT mode purpose dethermalizer bring airplane down fast possible damage best accomplished plane outside thermal big problem swinging weight DTs allow plane continue circling after DT has activated have lost several planes DT went off swinging weight plane stayed thermal flew out sight stalling way big advantage pop-up stab trimmed properly will cause plane fly straight thereby leave thermal well kill glide dramatic demonstration occurred last years Three Rivers MI contest Stan Stoy Paul Shailor both hooked same thermal max late day Both planes DTed within couple seconds other Stans pop-up stab came down field pauls swinging weight flew QOS Solareraft presents 2 new fun flyers Sosar Dart 12 rubber powercd helicopter climbs over 251 $300 postage paid ready fly Slav Scamp 12 high performance free flyiog stick model $400 postage paid ready fly ssd cht*kor monet order tr Solareraft F)Ito h82santa Barbara A5111 IX aX mnqarrrc Ins ted Multi-Purpose Work Center Panavise Products 2850 E 29th St Long Beach CA 90806 EPOXY GLASS COWLS FOR NOSEN PICA SIB MORGAN BALSA USA PLA 77 CONCEPT FLEET HOSTEnER RCM T-CRAPT SHEBER irrs ft SCALE SUPER CUB POKKER 0-7 BOEING P- 12 P-26 P4B2 P4B4 SPARROW HAWK GEE BEE MOO Y MACBR/ENS TURBULENt CHRISTEN EAGLE BRISIGHELLAS STAROUSTER II E J3-BI BABY FLYBABY AIRCAMPER PILOT JUNGMANN 135 SCALE ft OTHERS WHEEL PANTS FOR CITABRIA STAROUSTERI P177S SKYBOLT LIBERTYSPORT CHRISTEN EAGLE PB E HA WE STEARMAN STINSON SR-B MULLIGAN ft OTHERS BRAZED Es HEAT-TREATED WIRE GEARSEsCABANES LARGE SCALE PLANS AvAILABLE DiscouNT ON COWL WHEN PLANS ARE PURCHASED Send SASE latest list supply Modelers fiberglass parts plansWrite call us T 8 D FIBERGLASS SPECIALTIES 30925 BLOCK GARDEN Cflv MI 4B135 PHONE 31 421-6358 LEADER IN SMALL AIRFOIL TECHNOLOGY MASTER AIRSCREW IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 came down lake Just few comments contests flying general go contest take three well-trimmed planes possibly can can tell personal experience nothing frustrating losing trimmed plane having no back-up ship Secondly since have DT plane use Again personal experience lighting DT surefire way hook thermal lose plane Let relate experience demonstrates results following suggestions 1975 Nats came within 24 seconds becoming first person win 25-year-old Tulsa Glue Dobbers Trophy twice trimmed glider didnt light DT watch plane disappear over Lake Charles blew launch trimmed back-up ship finished second Joe Mekina Finally remember Murphys Law anything can go wrong will secret have go wrong practice no watching things wont go wrong contest FF Duration/Meuser Continued page 61 basic idea fuse bums through wing hold-down rubberbands wing pops off model inasmuch string has provided keep body soul together being attached aft end fuselage some point near tip wing thing comes down rather well-behaved fashion fuse lage assembly hangs nose down suspended rapidly rotating wing P-30 rate descent just about right fast enough ensure its falling out boomers slow enough ensure its survival isnt quite simple seems few details require attention Swivels must provided accommodate rotation wing might have cope either horribly snarled line line actually being twisted two wing rubberbands must touch fuse squeeze tightly snuff out before does its duty wing pops off must such way string doesnt wrap around stab means DT line must pass over top stab must short enough cant slip under stab Light monofilament fishing line leader stock makes good line must swivel either end preferably both ends line should snap catch end conveni ence made swivel pins copying George Xenakis arrangement can buy neat little swivels snap catches stores selling fishing tackle NFFS news items NFFS Digest has new editon member National Free Flight Society already know about maybe didnt notice Anyhow thought Id let couple issues slip before saying much about itjust sure really goingto happen Due circumstances entirely within control got bungled somehow once again find myself role editor Western Hemishperes prestigious all-FreeFlight publication Free Flight familiarly known simply Digest Over years cover dates have slipped sub stantially behind dates publication will take some fancy footwork bit lying cheating catch up will have no effect number pages get per subscription dollar goal ever different editors have different ways going about maximize amount material members likely find interesting informative per square inch type will 17% smaller thing still easily readable Ad prices being juggled discourage overly-large ads make ad prices least cover cost publishing same time making no expensive modeler has few items peddle off lot good material inherited previous editor John Oldenkamp lot has received since can always use As always well need help can get draftingnothing fancyjust good clean pencil work Photographic journalistic cover age major meetsespecially Natswould help too Adult memberships including subscription cost $15 year $27 two persons 18 under $750 $1350 Send money Kit Soneson 8616 Maple Grove Ct Sacramento CA 95828 NFFS Model Year Free Flight Hall Fame awards 1981 National Free Flight Society proudly announces its traditional annual awards outstanding Free Flight models modelers Hall Fame awards include Maxwell Bassett introduced internal combustion engine competition Free Flight 1932 William LElTinger Berkeley Models developer manufacturer large number award-winning kits Duke Fox developed produced competition engines reason able price started trend toward hot fuels used today Joe Lucas deceased expert teacher writer model aviation Peck- PIyauers 5QxM PHONE 7143 46-6~ o 7144424636 August1981 129 PRESENTS BALSA STRIPPER A95 AT YOUR DEALER PRECISION STRIP WOOD TO x INS FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOLGREAT PRICE WINDSOR PROPELLER CO PO BOX 112WINDSOR CA 95492 RANDYS UNIFLOW STUNT TANKS PROFI L E*COMBAI* RAT* WIDE & NARROW WEDGE 2-- 6 oz Capacities Standard vent available CUSTOM BLEND FUEL 5--40%Nitro Send 25cents specs CAROLINA- TAFFINDER 8345 Delhi Road Charleston Hgts SC 29405 PATTERN AND 04e0 4 HIGH SPEED PROPELLERS Hok D IlY AIRSCREW CUSTOM HIGH PERFORMANCE MAPLE PROPELLERS Propeller designed using symmetrical profile Individually precision hand balanced Accurate airfoil pitch Only high quality straight grain Eastern Maple used 8~ X 6% FORMULA 14 iox 6 Oo liX lix, ilXS CUSTOM DESIGN UPON REQUE ST OrRECT SALES EU PROSOCTO 5034 CRYSTAL COURTAdd 5100 pe AIde f PAstas ad handlieg SANTA ROSA CA 95404 PHONE TO SAROSSACA RES ASH 0% TAO 13 LACEY M-1O PEANUT KITS $495 EACH LACEY M15COUGARMUSTANG PIETENPOLGIPSY MOTHZERO PIPER CUBGANAGOBIEMILES M15 ANDRESONDRUINE cOAIPIETE CATALOG $100 HARD TO FIND ACCESSORIES KITS AND S FOR RUBBER POWERED MODELS
Edition: Model Aviation - 1981/08
Page Numbers: 57, 58, 59, 127, 128, 129
e Stoy poses two Wasps flown T9 Nats Mike came second ravity Powered Free FlightTeamMike stan Stoy Bob Hayes Jr won National OHLG Team Challenge Photo Jim Raeder others author High-time winner Outdoor l-tLGliderat last years National Contest design can built specialized materials Author includes bushel good advice about planning training winning contests should know. hes won plentyOMike Stoy IN OUTDOOR Hand-Launched Glider compe tition consistency name game Wasp VI due its large size careful selection moments offers superb consistency thermaling ability nearly impossible beat planes contest performance impressive kinds weatherfrom light lift calm winds high winds super booming thermals people idea built-up Hand Launched Glider may seem like too much un necessary complication sport model probably true competition design concept offers several advantages major difference wing loading can achieved built-up structure real importance produces super-light airplane since too light plane impossible throw can build light planes less-thanlight wood Getting piece good C-grain wood 8-to 10-lb range lot easier finding same type wood 4- 6-lb range heavier wood also less likely contain wind checks will weaken light stuff using right weight wood built-up structure can produce plane lighter same plane built super-light piece wood solid wing no sacrifice strength design beginners model Its complexity makes bad choice anything other contest performance its large size requires fairly good throwing arm achieve reasonable altitude top-notch contest design looking plane will fill bill Construction Wood selection Wasp VI critical competition designs wing wood should C-grain 8 10 lb per cubic foot density preferable lighter strictly dead-air planes Both stabilizer rudder should 6- 8-lb B- C-grain wood fuselage should springy straight-grain spruce cant obtain wide enough piece wood wing can splice two narrower pieces True up edges joined straightedge razor blade Hold edges firmly together work board tape few strips masking tape perpendicular joint followed long strip 1-in masking tape running length jointon same side earlier strips Now flip wood over fold open along joint Run some white glue length joint lay wood flat work board masking tape side down Weight wood some dope bottles other weights wipe off glue squeezes out Let glue dry remove tape will have piece wide wood Begin cutting Out wing Splice spruce leading edge wing after soaking hot water few minutes Use masking tape pins hold place spruce will bend easier breaking pull firmly August 1981 57 keep tension bend around tip Plane wing rough airfoil shape sharp razor plane Follow sandpaper working 80 grit down 400 grit Form airfoil wing just building solid wing have finished sanding wing Cut out holes panels operation cutting square hole razor blade easiest method Cut dihedral breaks bevel dihedral angles Cut spar slot main panels note actually involves removing 1 / 16 wood main panels otherwise will match tips should pay particular atten tion getting slot vertical Cut out plywood spars check fit before gluing place Glue spars first glue ribs easiest way make ribs cut out rectangles 1/16 balsa rather cutting out airfoil shapes glue Sand airfoil ribs after place glue has dried Glue dihedral joints check lateral balance wing sand heavy tip until wing balanced Dope sand wing before covering tissue Using bright colored tissue wings will make plane easier spot lands Give wings several coats dope tissue necessary maintain strength wing using enough dope can let tissue sag reducing wings strength well-doped wing will also reduce chance wing warping will change trim Cut fuselage wing hold-down piece spruce Dont omit wing hold-down adds considerably strength fuselageto-wing joint major trouble spot some modelers Cut out sand stabilizer rudder Cut dethermalizerDT break line stabilizer round edges joint Tape stab back together drill holes thread hinges Sew hinges figure-eight pattern giving about three passes hinge Use ordinary sewing thread hinges Dont forget take tape off stab glue ends thread finish Attach stabilizer rudder fuselage being careful get alignment correct Again watching alignment glue wing wing hold-down finger grip Prepare hardware DT system install shown plans photos couple things watch installing DT system Dont use cyanoacry late glue hold DT line rear stab cyanoacrylate soaks thread stiffens short distance knot stiffened thread can hang up rear DT guide loop stop tail popping up Second gluing plywood stop top stab make sure room DT rubberband clear rudder stab pops up can also cause system fail crack rear rudder Trimming flying Bring glider balance CG epoxying piece lead nose filing away lead until glider balances fore-aft point shown plans Check plane over thoroughly warps head out flying field trimming procedure follows test glide plane until smooth glide obtained left-hand 58 Model Aviation After cutting rectangular W, .u true uurnurs re rounuea power sooi makes mis easy wing ribs cut 1/16 x p stock glued place cyanoacrylate Wing ribs trimmed glued place Sand airfoil ribs glue dries Tfle wasp uses pop-up aemnermallzer ace mne text mor details make thread hinges FULL-SIZE PLANS AVAILABLE . SEE PAGE 132 TIP LE LAMINATED I/16X I/H SPNIJCE WINS THICKNESS TAPERS FROM I/H AT CENTER TO I/IA AT TIP 116 BALSA RIBS II=ll GLB 1/4 C DRAIN BALSAtill. TISSUE COVEREDIll) 6 SPAR B SD SPRUCE E I/H BALSA FINGER REST LEWD NOSE WEIGRY FRONT 1/4 SIZE 5/B I/H TOP FIUDRE B TRREAO HINUESITYPI STABILIZER U LU I/IA B URAIN BALSA ST WARE GB WIRE 5 ROSA DI WIRE LINE GUIDES F1 WIRE ST HOOK CUT DOWN PIN 1/32 PLYWOOD STAB STOP I/H AWBINUM SMJFFER TORE US LB DACRON FISIIINO LINE ALUMINUM FOIL I/U SPRUCE WING ROLD DOWN LII CU FUSELAGE 4/B S S/4 SPRUCE -I WIRES NOOKWIRE UDIDE 'SANDPAPER FINGER URIP CUT DOWN PINST LINE ITO TAIL SIDE RUDDERPLO STAB STOP B LU 1/16 B GRAIN BALSA UT RUBBER BAND WIRE UT HOORIt, ST LINE ITO WIRE USISE circle about 50 60 feet diameter Adjust plane smooth launch transition warping aerodynamic surfaces required smooth launch transition achieved fine-trim glide moving CG position making initial flights throw about 60% power 450 angle slight right bank Once plane flying satisfaction work up about 90% power bring launch angle down 1Oo2Oo Throwing full power very close little risky accuracy decreases near full power results badly blown launches something cant afford contest Work outs practicing competing Handlaunched Glider flying largely athletic event Although can overcome some deficien cies throwing arm no will argue fact having good ann improves chances winning otthe best exercises br HLG throwing softball tennis ball cant find someone else throw find brick wall throw against few weeks before contest work doing large number repetitions about r Four five days before contest begin decreasing number throws increasing power until reach full power two days before day before contest few light throws loosen up dont heavy workout day contest dont throw gliders until after have loosened up Unquestionably best single way get shape contest practice improves shape ann importantly will make familar planes Consistency key must know exactly plane performs conditions means practicing windy days well dead air evening cant expect win outdoor contests getting thermals yet am continuaily amazed number people have never practiced picking air contest no place find out plane wont hold lift So practice picking Continued page 127 stan Toy iauncnes pracsce SIUIO NJflL1 athletic event author describes successful training regimen article August 1981 59 I4LUis Thike Stoj WINU SPAN SD INCHES WING AREA 7725 SD INCHES TOTAL WEIURT DES DRABSI35R OUNCES AIRFOIL FLAT BOTTOM1 54% RIUR POINT AT 27% OF CORD STAB UREA 22% OF WIND RUDDER AREA 5% OF WIND INCHES I/S I53DRAWN BY MIKE STOY S-ID75 SNUFFER TUBE ST RUBBER SAND ST FUSE ALUMINUM FOIL .alizer rubberband cut ballOonmore cOnsistent AE ROTRENDS LATEST NEW CREAM Tuned Pipe Coupler high-nitro appli cations Tested proven over 60% nitro closed canopy applications Super heat resistant MUST FOR RC BOATERS SIZES 1/2 ID x 5/32 waIl 5/8 ID x 5/32 waIl 3/4 ID x 3/16 wall 7/8 ID x 1/4 wall 1/2 ID x 5/32 waIl 5/8 ID x 5/32 wall 3/4 ID x 3/16 wall 7/8 ID x 1/4 waIl LENGTH 3 3 3 3 12 12 12 12 ULTRA BLUE Tuned Pipe Coupler Still best value general applica tions 5% nitro Available 1/2 5/8 & 3/4 ID 4 & 12 lengths LIST PRICE $199 229 329 499 795 895 1295 1895 Tuned Pipe COUPLER CLAMPSI Best method connecting tuned pipe couplers Will conduct heat like metal clamps ULTRA BLUE Tuned Pipe Coupler M IN /MAX 7/16 1/2 5/8 23/32 47/64 53/64 55/64 15/16 63/64 1-1/8 11/8 1-7/32 AMT 2/pkg 2/pkg 2/pkg 2/pkg 2/pkg 2/pkg FOR Exhaust Exhau St Most 20s Most 40s Most 60s Most 80s LIST PRICE $159 159 159 159 159 159 Send self-addressed Stamped envelope FREE catalog DEALER INQUIRY INVITED 7/El 0/REND PRODUCTS 44 West Prospect Street New Haven CT 06515 203 397 3755 Guardian fuel tank access Marc Warwa shanas Loire-Nieuport 42 uses single long hatch access throttle tank bellcrank arrangement possible because aft location belicrank particular model Blackburn Firecrest built Leon Ryktarsyk uses separate hatches engine tank access control system installed wing limited access possible after tank removal end result case model can accept changes repairs fuel system throttle control system damag ing model An added benefit ability inspect components correct problems early stage before cause loss score loss airplane art landing two official flights landing score amounting about 40% flight score landing important two factors important success ful landing first getting airplane deck within arresting area second getting hook engage arresting line stop airplane Assuming hook properly constructed adjusted see June column type approach holds secret success Getting plane deck arresting area takes bit practice since different type landing normal type CL modelers used Soft gentle landings must take second place precision landings latter little harder landing area 20 ft long model needs half three-quarters second pass com pletely over two ways land Carrier model illustrated photos accompanying article best way far achieve desired result approach deck level flight about 5-ft altitude point about 20 ft stern deck deck comes clearly view begin smooth descent will cause model hit deck about 8 10 ft past stern fourth fifth arresting line rate ofdescent landing loads equivalent dropping model onto its gear height about 12 model will land near-level attitude normal arrested landing almost certainty alternative landing nique fly over deck apply down elevator dive landing areareminiscent Kamikaze attack Such approaches familiar us doubt Carrier flier anywhere hasnt attempted natural reaction approach made too high fear losing five points missed landing approach overrides reason thought going around another approach disappears entirely usual result loss 50 100 points rather five would have resulted going around problem Kamikaze method the%tail last thing hit deck hook often doesnt get chance its job usual result prop shaft what left broken propeller badly deflected landing gear forced under arresting line model either stops its nose 50 points likely flipped its back 25 points model should end up its gear chance hook catching line reduced because severe bouncing results engine will have stopped go around impossible 0 points Patience key Success trophies usually go flier abandons bad approach necessary takes much certain 95-point landing next lap landing photos Bill Rutledges STOL Bearcat 1978 Nats good landing placed first Junior Profile RichardL Periy 416 WoodhillDrive Golds boro NC 27530 Wasp VI/Stoy Continued page 59 air get planes trimmed riding thermals different ways picking air contest Some common ones piggybacking thermal poles streamers bubbles cattails three systems rLiqhr 4ft 6edeI4611 $9900 DELIVERED VISA Four Folding Legs Wing lage Holders Add $400 Shipping Calif 8% Tax RAC Products408 274-1915 3200 Knightnwood Way S San Jose CA 95148 August1981 127 K FifE FANUS TIC NELSON 15 detailed brochure send 25 cents Kus torn Kraftsmanship PO Box 2699 Laguna Hills CA 92653 Ph 714 830-5162 Dealer inquiries invited IN STOCK FOR IMMEDIATE SHIPMENT New SUPER QUADRA $8995 BRISIGHELLA FLYWHEEL $10695 QUADRA REPAIR$1000 s KIORITZ engine 244 culn$18995 Jim Messers ERCOUPE KIT$21995 Jim Messers TOMAHAWK KIT$23995 Concepts BIG FLEET KIT $17995 P&W RADIAL ENGINES Fleet $2995 FIBERGLASS COWL Fleet$1995 BALSA & BASSWOOD sIzes 40% OFF /a SCALE plans QUADRA ERCOUPE TOMAHAWK SKYBOLT$2195 SUPER STEARMAN Godfrey$2495 STARDUSTER TOO C Brislghella $2995 COCKPIT KITS Ercoupe T-Hawk $1500 Stearman Fleet F4U J-3 Cub$1850 ME-log $1950 Citabrla Nosen $2495 24-Hour Service - Add $2SO postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706 Outstanding Big Scale Aerobatics * % STAND OFF SCALE SIZE * 92 WINGSPAN 1509 SQ IN * WEIGHT 19 21 LBS * FIBERGLAS COWL & WHEELPANTS * QUADRA ENGINE * AVAILABLE NOW * PRE $189 bh. BABE really BIG Wing span 53Area 464 sq Engine 30-40Radio 4-channel Send 60f literature other kits & accessories has advantages disadvantages Piggybacking tells exactly ther mal strong However requires run under plane going piggyback can quite feat windy day means frequently launch down wind plane goes out timers sight sooner Piggybacking also results quite few badly blown launches flier off balance hurry hasnt set himself properly launchas demonstrated 1978 Nats Bob Boyerwhowonthe event missed sixth max national record after running under another thermaling glider have bad launch Another problem piggy backing isnt always someone else air ready fly Thermal poles streamers allow stand place set up launch lessens problem bad launches Poles also eliminate need someone else air fly big disadvantage stream ers tell exactly thermal centered less indication strong using two poles can lessen problem somewhat big advan tage poles over bubbles poles work well windy days dont indicate very light lift Bubbles cattails show thermal fast going up also allow set up place prior launching dont require other planes air biggest disadvantage windy days bubbles break up blown ground system use isnt important knowing use well get contest again means going out setting up equipment getting someone else fly ATTENTION ERS 128 Model Aviation product review product review product review Unless have three hands Panavises Model 350 multi-purposeworkcenterisa alluring product gives Stand ard Base Model 300 tilts turns rotates desired work position Tray Base Mount Model 312 six individual trays hold small parts tools right want Self-Centering Extra Wide Opening Head Model 376 allows work objects up to9 in size well tiny hard-tohold things Panavise says Model 350 will find million uses workbench least Its ingenious product review product review product review AVAILABLE NOWtWoo UPF 7 SO-Arpo$2395 JB spoolal MK III 54 Mono 78 Sips Weight iSbn 2195 TsnI Air 2000 105 Clamrc Scele Bplone 23 lbs 2295 TnM 4000 99 Rodrel Eng Cloosic Sips 23 Sn 2295 Fnkkes DVII 55 Geoon WW Frghte ape 23 lbs 2495 Coming 5non Oopmth Pop 50 5rpe Sopscoh Ttipehoond 50 Toplano Woco ATO Lyjook VeoOo 90 Srplaoe Neoport 11 gebe 55 5pleno 35 Ocoln Fobbe 081 72 Triplono Plans shipped U PS Pairel Post Please add $300 postage handlino fastest service send pOstoi money order No C LID orders sent BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 212 337-6987 goat flights you practlce trimming plane contest should mentioned earlier check pattern different weather conditions particularly thermals big problem trimming large thermals some planes will spin Out single best remedy washin inboard tip twisting leading edge upward respect trailing edge trimming plane try get transitlon come out directly over head plane pointed wind flying crosswind downwind transition will put plane out timers sight sooneras well causing glider come out downwind thermaL Knowing exactly plane transitions important plan piggyback throw rising bubbles Another thing check trim plane DT mode purpose dethermalizer bring airplane down fast possible damage best accomplished plane outside thermal big problem swinging weight DTs allow plane continue circling after DT has activated have lost several planes DT went off swinging weight plane stayed thermal flew out sight stalling way big advantage pop-up stab trimmed properly will cause plane fly straight thereby leave thermal well kill glide dramatic demonstration occurred last years Three Rivers MI contest Stan Stoy Paul Shailor both hooked same thermal max late day Both planes DTed within couple seconds other Stans pop-up stab came down field pauls swinging weight flew QOS Solareraft presents 2 new fun flyers Sosar Dart 12 rubber powercd helicopter climbs over 251 $300 postage paid ready fly Slav Scamp 12 high performance free flyiog stick model $400 postage paid ready fly ssd cht*kor monet order tr Solareraft F)Ito h82santa Barbara A5111 IX aX mnqarrrc Ins ted Multi-Purpose Work Center Panavise Products 2850 E 29th St Long Beach CA 90806 EPOXY GLASS COWLS FOR NOSEN PICA SIB MORGAN BALSA USA PLA 77 CONCEPT FLEET HOSTEnER RCM T-CRAPT SHEBER irrs ft SCALE SUPER CUB POKKER 0-7 BOEING P- 12 P-26 P4B2 P4B4 SPARROW HAWK GEE BEE MOO Y MACBR/ENS TURBULENt CHRISTEN EAGLE BRISIGHELLAS STAROUSTER II E J3-BI BABY FLYBABY AIRCAMPER PILOT JUNGMANN 135 SCALE ft OTHERS WHEEL PANTS FOR CITABRIA STAROUSTERI P177S SKYBOLT LIBERTYSPORT CHRISTEN EAGLE PB E HA WE STEARMAN STINSON SR-B MULLIGAN ft OTHERS BRAZED Es HEAT-TREATED WIRE GEARSEsCABANES LARGE SCALE PLANS AvAILABLE DiscouNT ON COWL WHEN PLANS ARE PURCHASED Send SASE latest list supply Modelers fiberglass parts plansWrite call us T 8 D FIBERGLASS SPECIALTIES 30925 BLOCK GARDEN Cflv MI 4B135 PHONE 31 421-6358 LEADER IN SMALL AIRFOIL TECHNOLOGY MASTER AIRSCREW IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 came down lake Just few comments contests flying general go contest take three well-trimmed planes possibly can can tell personal experience nothing frustrating losing trimmed plane having no back-up ship Secondly since have DT plane use Again personal experience lighting DT surefire way hook thermal lose plane Let relate experience demonstrates results following suggestions 1975 Nats came within 24 seconds becoming first person win 25-year-old Tulsa Glue Dobbers Trophy twice trimmed glider didnt light DT watch plane disappear over Lake Charles blew launch trimmed back-up ship finished second Joe Mekina Finally remember Murphys Law anything can go wrong will secret have go wrong practice no watching things wont go wrong contest FF Duration/Meuser Continued page 61 basic idea fuse bums through wing hold-down rubberbands wing pops off model inasmuch string has provided keep body soul together being attached aft end fuselage some point near tip wing thing comes down rather well-behaved fashion fuse lage assembly hangs nose down suspended rapidly rotating wing P-30 rate descent just about right fast enough ensure its falling out boomers slow enough ensure its survival isnt quite simple seems few details require attention Swivels must provided accommodate rotation wing might have cope either horribly snarled line line actually being twisted two wing rubberbands must touch fuse squeeze tightly snuff out before does its duty wing pops off must such way string doesnt wrap around stab means DT line must pass over top stab must short enough cant slip under stab Light monofilament fishing line leader stock makes good line must swivel either end preferably both ends line should snap catch end conveni ence made swivel pins copying George Xenakis arrangement can buy neat little swivels snap catches stores selling fishing tackle NFFS news items NFFS Digest has new editon member National Free Flight Society already know about maybe didnt notice Anyhow thought Id let couple issues slip before saying much about itjust sure really goingto happen Due circumstances entirely within control got bungled somehow once again find myself role editor Western Hemishperes prestigious all-FreeFlight publication Free Flight familiarly known simply Digest Over years cover dates have slipped sub stantially behind dates publication will take some fancy footwork bit lying cheating catch up will have no effect number pages get per subscription dollar goal ever different editors have different ways going about maximize amount material members likely find interesting informative per square inch type will 17% smaller thing still easily readable Ad prices being juggled discourage overly-large ads make ad prices least cover cost publishing same time making no expensive modeler has few items peddle off lot good material inherited previous editor John Oldenkamp lot has received since can always use As always well need help can get draftingnothing fancyjust good clean pencil work Photographic journalistic cover age major meetsespecially Natswould help too Adult memberships including subscription cost $15 year $27 two persons 18 under $750 $1350 Send money Kit Soneson 8616 Maple Grove Ct Sacramento CA 95828 NFFS Model Year Free Flight Hall Fame awards 1981 National Free Flight Society proudly announces its traditional annual awards outstanding Free Flight models modelers Hall Fame awards include Maxwell Bassett introduced internal combustion engine competition Free Flight 1932 William LElTinger Berkeley Models developer manufacturer large number award-winning kits Duke Fox developed produced competition engines reason able price started trend toward hot fuels used today Joe Lucas deceased expert teacher writer model aviation Peck- PIyauers 5QxM PHONE 7143 46-6~ o 7144424636 August1981 129 PRESENTS BALSA STRIPPER A95 AT YOUR DEALER PRECISION STRIP WOOD TO x INS FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOLGREAT PRICE WINDSOR PROPELLER CO PO BOX 112WINDSOR CA 95492 RANDYS UNIFLOW STUNT TANKS PROFI L E*COMBAI* RAT* WIDE & NARROW WEDGE 2-- 6 oz Capacities Standard vent available CUSTOM BLEND FUEL 5--40%Nitro Send 25cents specs CAROLINA- TAFFINDER 8345 Delhi Road Charleston Hgts SC 29405 PATTERN AND 04e0 4 HIGH SPEED PROPELLERS Hok D IlY AIRSCREW CUSTOM HIGH PERFORMANCE MAPLE PROPELLERS Propeller designed using symmetrical profile Individually precision hand balanced Accurate airfoil pitch Only high quality straight grain Eastern Maple used 8~ X 6% FORMULA 14 iox 6 Oo liX lix, ilXS CUSTOM DESIGN UPON REQUE ST OrRECT SALES EU PROSOCTO 5034 CRYSTAL COURTAdd 5100 pe AIde f PAstas ad handlieg SANTA ROSA CA 95404 PHONE TO SAROSSACA RES ASH 0% TAO 13 LACEY M-1O PEANUT KITS $495 EACH LACEY M15COUGARMUSTANG PIETENPOLGIPSY MOTHZERO PIPER CUBGANAGOBIEMILES M15 ANDRESONDRUINE cOAIPIETE CATALOG $100 HARD TO FIND ACCESSORIES KITS AND S FOR RUBBER POWERED MODELS
Edition: Model Aviation - 1981/08
Page Numbers: 57, 58, 59, 127, 128, 129
e Stoy poses two Wasps flown T9 Nats Mike came second ravity Powered Free FlightTeamMike stan Stoy Bob Hayes Jr won National OHLG Team Challenge Photo Jim Raeder others author High-time winner Outdoor l-tLGliderat last years National Contest design can built specialized materials Author includes bushel good advice about planning training winning contests should know. hes won plentyOMike Stoy IN OUTDOOR Hand-Launched Glider compe tition consistency name game Wasp VI due its large size careful selection moments offers superb consistency thermaling ability nearly impossible beat planes contest performance impressive kinds weatherfrom light lift calm winds high winds super booming thermals people idea built-up Hand Launched Glider may seem like too much un necessary complication sport model probably true competition design concept offers several advantages major difference wing loading can achieved built-up structure real importance produces super-light airplane since too light plane impossible throw can build light planes less-thanlight wood Getting piece good C-grain wood 8-to 10-lb range lot easier finding same type wood 4- 6-lb range heavier wood also less likely contain wind checks will weaken light stuff using right weight wood built-up structure can produce plane lighter same plane built super-light piece wood solid wing no sacrifice strength design beginners model Its complexity makes bad choice anything other contest performance its large size requires fairly good throwing arm achieve reasonable altitude top-notch contest design looking plane will fill bill Construction Wood selection Wasp VI critical competition designs wing wood should C-grain 8 10 lb per cubic foot density preferable lighter strictly dead-air planes Both stabilizer rudder should 6- 8-lb B- C-grain wood fuselage should springy straight-grain spruce cant obtain wide enough piece wood wing can splice two narrower pieces True up edges joined straightedge razor blade Hold edges firmly together work board tape few strips masking tape perpendicular joint followed long strip 1-in masking tape running length jointon same side earlier strips Now flip wood over fold open along joint Run some white glue length joint lay wood flat work board masking tape side down Weight wood some dope bottles other weights wipe off glue squeezes out Let glue dry remove tape will have piece wide wood Begin cutting Out wing Splice spruce leading edge wing after soaking hot water few minutes Use masking tape pins hold place spruce will bend easier breaking pull firmly August 1981 57 keep tension bend around tip Plane wing rough airfoil shape sharp razor plane Follow sandpaper working 80 grit down 400 grit Form airfoil wing just building solid wing have finished sanding wing Cut out holes panels operation cutting square hole razor blade easiest method Cut dihedral breaks bevel dihedral angles Cut spar slot main panels note actually involves removing 1 / 16 wood main panels otherwise will match tips should pay particular atten tion getting slot vertical Cut out plywood spars check fit before gluing place Glue spars first glue ribs easiest way make ribs cut out rectangles 1/16 balsa rather cutting out airfoil shapes glue Sand airfoil ribs after place glue has dried Glue dihedral joints check lateral balance wing sand heavy tip until wing balanced Dope sand wing before covering tissue Using bright colored tissue wings will make plane easier spot lands Give wings several coats dope tissue necessary maintain strength wing using enough dope can let tissue sag reducing wings strength well-doped wing will also reduce chance wing warping will change trim Cut fuselage wing hold-down piece spruce Dont omit wing hold-down adds considerably strength fuselageto-wing joint major trouble spot some modelers Cut out sand stabilizer rudder Cut dethermalizerDT break line stabilizer round edges joint Tape stab back together drill holes thread hinges Sew hinges figure-eight pattern giving about three passes hinge Use ordinary sewing thread hinges Dont forget take tape off stab glue ends thread finish Attach stabilizer rudder fuselage being careful get alignment correct Again watching alignment glue wing wing hold-down finger grip Prepare hardware DT system install shown plans photos couple things watch installing DT system Dont use cyanoacry late glue hold DT line rear stab cyanoacrylate soaks thread stiffens short distance knot stiffened thread can hang up rear DT guide loop stop tail popping up Second gluing plywood stop top stab make sure room DT rubberband clear rudder stab pops up can also cause system fail crack rear rudder Trimming flying Bring glider balance CG epoxying piece lead nose filing away lead until glider balances fore-aft point shown plans Check plane over thoroughly warps head out flying field trimming procedure follows test glide plane until smooth glide obtained left-hand 58 Model Aviation After cutting rectangular W, .u true uurnurs re rounuea power sooi makes mis easy wing ribs cut 1/16 x p stock glued place cyanoacrylate Wing ribs trimmed glued place Sand airfoil ribs glue dries Tfle wasp uses pop-up aemnermallzer ace mne text mor details make thread hinges FULL-SIZE PLANS AVAILABLE . SEE PAGE 132 TIP LE LAMINATED I/16X I/H SPNIJCE WINS THICKNESS TAPERS FROM I/H AT CENTER TO I/IA AT TIP 116 BALSA RIBS II=ll GLB 1/4 C DRAIN BALSAtill. TISSUE COVEREDIll) 6 SPAR B SD SPRUCE E I/H BALSA FINGER REST LEWD NOSE WEIGRY FRONT 1/4 SIZE 5/B I/H TOP FIUDRE B TRREAO HINUESITYPI STABILIZER U LU I/IA B URAIN BALSA ST WARE GB WIRE 5 ROSA DI WIRE LINE GUIDES F1 WIRE ST HOOK CUT DOWN PIN 1/32 PLYWOOD STAB STOP I/H AWBINUM SMJFFER TORE US LB DACRON FISIIINO LINE ALUMINUM FOIL I/U SPRUCE WING ROLD DOWN LII CU FUSELAGE 4/B S S/4 SPRUCE -I WIRES NOOKWIRE UDIDE 'SANDPAPER FINGER URIP CUT DOWN PINST LINE ITO TAIL SIDE RUDDERPLO STAB STOP B LU 1/16 B GRAIN BALSA UT RUBBER BAND WIRE UT HOORIt, ST LINE ITO WIRE USISE circle about 50 60 feet diameter Adjust plane smooth launch transition warping aerodynamic surfaces required smooth launch transition achieved fine-trim glide moving CG position making initial flights throw about 60% power 450 angle slight right bank Once plane flying satisfaction work up about 90% power bring launch angle down 1Oo2Oo Throwing full power very close little risky accuracy decreases near full power results badly blown launches something cant afford contest Work outs practicing competing Handlaunched Glider flying largely athletic event Although can overcome some deficien cies throwing arm no will argue fact having good ann improves chances winning otthe best exercises br HLG throwing softball tennis ball cant find someone else throw find brick wall throw against few weeks before contest work doing large number repetitions about r Four five days before contest begin decreasing number throws increasing power until reach full power two days before day before contest few light throws loosen up dont heavy workout day contest dont throw gliders until after have loosened up Unquestionably best single way get shape contest practice improves shape ann importantly will make familar planes Consistency key must know exactly plane performs conditions means practicing windy days well dead air evening cant expect win outdoor contests getting thermals yet am continuaily amazed number people have never practiced picking air contest no place find out plane wont hold lift So practice picking Continued page 127 stan Toy iauncnes pracsce SIUIO NJflL1 athletic event author describes successful training regimen article August 1981 59 I4LUis Thike Stoj WINU SPAN SD INCHES WING AREA 7725 SD INCHES TOTAL WEIURT DES DRABSI35R OUNCES AIRFOIL FLAT BOTTOM1 54% RIUR POINT AT 27% OF CORD STAB UREA 22% OF WIND RUDDER AREA 5% OF WIND INCHES I/S I53DRAWN BY MIKE STOY S-ID75 SNUFFER TUBE ST RUBBER SAND ST FUSE ALUMINUM FOIL .alizer rubberband cut ballOonmore cOnsistent AE ROTRENDS LATEST NEW CREAM Tuned Pipe Coupler high-nitro appli cations Tested proven over 60% nitro closed canopy applications Super heat resistant MUST FOR RC BOATERS SIZES 1/2 ID x 5/32 waIl 5/8 ID x 5/32 waIl 3/4 ID x 3/16 wall 7/8 ID x 1/4 wall 1/2 ID x 5/32 waIl 5/8 ID x 5/32 wall 3/4 ID x 3/16 wall 7/8 ID x 1/4 waIl LENGTH 3 3 3 3 12 12 12 12 ULTRA BLUE Tuned Pipe Coupler Still best value general applica tions 5% nitro Available 1/2 5/8 & 3/4 ID 4 & 12 lengths LIST PRICE $199 229 329 499 795 895 1295 1895 Tuned Pipe COUPLER CLAMPSI Best method connecting tuned pipe couplers Will conduct heat like metal clamps ULTRA BLUE Tuned Pipe Coupler M IN /MAX 7/16 1/2 5/8 23/32 47/64 53/64 55/64 15/16 63/64 1-1/8 11/8 1-7/32 AMT 2/pkg 2/pkg 2/pkg 2/pkg 2/pkg 2/pkg FOR Exhaust Exhau St Most 20s Most 40s Most 60s Most 80s LIST PRICE $159 159 159 159 159 159 Send self-addressed Stamped envelope FREE catalog DEALER INQUIRY INVITED 7/El 0/REND PRODUCTS 44 West Prospect Street New Haven CT 06515 203 397 3755 Guardian fuel tank access Marc Warwa shanas Loire-Nieuport 42 uses single long hatch access throttle tank bellcrank arrangement possible because aft location belicrank particular model Blackburn Firecrest built Leon Ryktarsyk uses separate hatches engine tank access control system installed wing limited access possible after tank removal end result case model can accept changes repairs fuel system throttle control system damag ing model An added benefit ability inspect components correct problems early stage before cause loss score loss airplane art landing two official flights landing score amounting about 40% flight score landing important two factors important success ful landing first getting airplane deck within arresting area second getting hook engage arresting line stop airplane Assuming hook properly constructed adjusted see June column type approach holds secret success Getting plane deck arresting area takes bit practice since different type landing normal type CL modelers used Soft gentle landings must take second place precision landings latter little harder landing area 20 ft long model needs half three-quarters second pass com pletely over two ways land Carrier model illustrated photos accompanying article best way far achieve desired result approach deck level flight about 5-ft altitude point about 20 ft stern deck deck comes clearly view begin smooth descent will cause model hit deck about 8 10 ft past stern fourth fifth arresting line rate ofdescent landing loads equivalent dropping model onto its gear height about 12 model will land near-level attitude normal arrested landing almost certainty alternative landing nique fly over deck apply down elevator dive landing areareminiscent Kamikaze attack Such approaches familiar us doubt Carrier flier anywhere hasnt attempted natural reaction approach made too high fear losing five points missed landing approach overrides reason thought going around another approach disappears entirely usual result loss 50 100 points rather five would have resulted going around problem Kamikaze method the%tail last thing hit deck hook often doesnt get chance its job usual result prop shaft what left broken propeller badly deflected landing gear forced under arresting line model either stops its nose 50 points likely flipped its back 25 points model should end up its gear chance hook catching line reduced because severe bouncing results engine will have stopped go around impossible 0 points Patience key Success trophies usually go flier abandons bad approach necessary takes much certain 95-point landing next lap landing photos Bill Rutledges STOL Bearcat 1978 Nats good landing placed first Junior Profile RichardL Periy 416 WoodhillDrive Golds boro NC 27530 Wasp VI/Stoy Continued page 59 air get planes trimmed riding thermals different ways picking air contest Some common ones piggybacking thermal poles streamers bubbles cattails three systems rLiqhr 4ft 6edeI4611 $9900 DELIVERED VISA Four Folding Legs Wing lage Holders Add $400 Shipping Calif 8% Tax RAC Products408 274-1915 3200 Knightnwood Way S San Jose CA 95148 August1981 127 K FifE FANUS TIC NELSON 15 detailed brochure send 25 cents Kus torn Kraftsmanship PO Box 2699 Laguna Hills CA 92653 Ph 714 830-5162 Dealer inquiries invited IN STOCK FOR IMMEDIATE SHIPMENT New SUPER QUADRA $8995 BRISIGHELLA FLYWHEEL $10695 QUADRA REPAIR$1000 s KIORITZ engine 244 culn$18995 Jim Messers ERCOUPE KIT$21995 Jim Messers TOMAHAWK KIT$23995 Concepts BIG FLEET KIT $17995 P&W RADIAL ENGINES Fleet $2995 FIBERGLASS COWL Fleet$1995 BALSA & BASSWOOD sIzes 40% OFF /a SCALE plans QUADRA ERCOUPE TOMAHAWK SKYBOLT$2195 SUPER STEARMAN Godfrey$2495 STARDUSTER TOO C Brislghella $2995 COCKPIT KITS Ercoupe T-Hawk $1500 Stearman Fleet F4U J-3 Cub$1850 ME-log $1950 Citabrla Nosen $2495 24-Hour Service - Add $2SO postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706 Outstanding Big Scale Aerobatics * % STAND OFF SCALE SIZE * 92 WINGSPAN 1509 SQ IN * WEIGHT 19 21 LBS * FIBERGLAS COWL & WHEELPANTS * QUADRA ENGINE * AVAILABLE NOW * PRE $189 bh. BABE really BIG Wing span 53Area 464 sq Engine 30-40Radio 4-channel Send 60f literature other kits & accessories has advantages disadvantages Piggybacking tells exactly ther mal strong However requires run under plane going piggyback can quite feat windy day means frequently launch down wind plane goes out timers sight sooner Piggybacking also results quite few badly blown launches flier off balance hurry hasnt set himself properly launchas demonstrated 1978 Nats Bob Boyerwhowonthe event missed sixth max national record after running under another thermaling glider have bad launch Another problem piggy backing isnt always someone else air ready fly Thermal poles streamers allow stand place set up launch lessens problem bad launches Poles also eliminate need someone else air fly big disadvantage stream ers tell exactly thermal centered less indication strong using two poles can lessen problem somewhat big advan tage poles over bubbles poles work well windy days dont indicate very light lift Bubbles cattails show thermal fast going up also allow set up place prior launching dont require other planes air biggest disadvantage windy days bubbles break up blown ground system use isnt important knowing use well get contest again means going out setting up equipment getting someone else fly ATTENTION ERS 128 Model Aviation product review product review product review Unless have three hands Panavises Model 350 multi-purposeworkcenterisa alluring product gives Stand ard Base Model 300 tilts turns rotates desired work position Tray Base Mount Model 312 six individual trays hold small parts tools right want Self-Centering Extra Wide Opening Head Model 376 allows work objects up to9 in size well tiny hard-tohold things Panavise says Model 350 will find million uses workbench least Its ingenious product review product review product review AVAILABLE NOWtWoo UPF 7 SO-Arpo$2395 JB spoolal MK III 54 Mono 78 Sips Weight iSbn 2195 TsnI Air 2000 105 Clamrc Scele Bplone 23 lbs 2295 TnM 4000 99 Rodrel Eng Cloosic Sips 23 Sn 2295 Fnkkes DVII 55 Geoon WW Frghte ape 23 lbs 2495 Coming 5non Oopmth Pop 50 5rpe Sopscoh Ttipehoond 50 Toplano Woco ATO Lyjook VeoOo 90 Srplaoe Neoport 11 gebe 55 5pleno 35 Ocoln Fobbe 081 72 Triplono Plans shipped U PS Pairel Post Please add $300 postage handlino fastest service send pOstoi money order No C LID orders sent BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 212 337-6987 goat flights you practlce trimming plane contest should mentioned earlier check pattern different weather conditions particularly thermals big problem trimming large thermals some planes will spin Out single best remedy washin inboard tip twisting leading edge upward respect trailing edge trimming plane try get transitlon come out directly over head plane pointed wind flying crosswind downwind transition will put plane out timers sight sooneras well causing glider come out downwind thermaL Knowing exactly plane transitions important plan piggyback throw rising bubbles Another thing check trim plane DT mode purpose dethermalizer bring airplane down fast possible damage best accomplished plane outside thermal big problem swinging weight DTs allow plane continue circling after DT has activated have lost several planes DT went off swinging weight plane stayed thermal flew out sight stalling way big advantage pop-up stab trimmed properly will cause plane fly straight thereby leave thermal well kill glide dramatic demonstration occurred last years Three Rivers MI contest Stan Stoy Paul Shailor both hooked same thermal max late day Both planes DTed within couple seconds other Stans pop-up stab came down field pauls swinging weight flew QOS Solareraft presents 2 new fun flyers Sosar Dart 12 rubber powercd helicopter climbs over 251 $300 postage paid ready fly Slav Scamp 12 high performance free flyiog stick model $400 postage paid ready fly ssd cht*kor monet order tr Solareraft F)Ito h82santa Barbara A5111 IX aX mnqarrrc Ins ted Multi-Purpose Work Center Panavise Products 2850 E 29th St Long Beach CA 90806 EPOXY GLASS COWLS FOR NOSEN PICA SIB MORGAN BALSA USA PLA 77 CONCEPT FLEET HOSTEnER RCM T-CRAPT SHEBER irrs ft SCALE SUPER CUB POKKER 0-7 BOEING P- 12 P-26 P4B2 P4B4 SPARROW HAWK GEE BEE MOO Y MACBR/ENS TURBULENt CHRISTEN EAGLE BRISIGHELLAS STAROUSTER II E J3-BI BABY FLYBABY AIRCAMPER PILOT JUNGMANN 135 SCALE ft OTHERS WHEEL PANTS FOR CITABRIA STAROUSTERI P177S SKYBOLT LIBERTYSPORT CHRISTEN EAGLE PB E HA WE STEARMAN STINSON SR-B MULLIGAN ft OTHERS BRAZED Es HEAT-TREATED WIRE GEARSEsCABANES LARGE SCALE PLANS AvAILABLE DiscouNT ON COWL WHEN PLANS ARE PURCHASED Send SASE latest list supply Modelers fiberglass parts plansWrite call us T 8 D FIBERGLASS SPECIALTIES 30925 BLOCK GARDEN Cflv MI 4B135 PHONE 31 421-6358 LEADER IN SMALL AIRFOIL TECHNOLOGY MASTER AIRSCREW IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 came down lake Just few comments contests flying general go contest take three well-trimmed planes possibly can can tell personal experience nothing frustrating losing trimmed plane having no back-up ship Secondly since have DT plane use Again personal experience lighting DT surefire way hook thermal lose plane Let relate experience demonstrates results following suggestions 1975 Nats came within 24 seconds becoming first person win 25-year-old Tulsa Glue Dobbers Trophy twice trimmed glider didnt light DT watch plane disappear over Lake Charles blew launch trimmed back-up ship finished second Joe Mekina Finally remember Murphys Law anything can go wrong will secret have go wrong practice no watching things wont go wrong contest FF Duration/Meuser Continued page 61 basic idea fuse bums through wing hold-down rubberbands wing pops off model inasmuch string has provided keep body soul together being attached aft end fuselage some point near tip wing thing comes down rather well-behaved fashion fuse lage assembly hangs nose down suspended rapidly rotating wing P-30 rate descent just about right fast enough ensure its falling out boomers slow enough ensure its survival isnt quite simple seems few details require attention Swivels must provided accommodate rotation wing might have cope either horribly snarled line line actually being twisted two wing rubberbands must touch fuse squeeze tightly snuff out before does its duty wing pops off must such way string doesnt wrap around stab means DT line must pass over top stab must short enough cant slip under stab Light monofilament fishing line leader stock makes good line must swivel either end preferably both ends line should snap catch end conveni ence made swivel pins copying George Xenakis arrangement can buy neat little swivels snap catches stores selling fishing tackle NFFS news items NFFS Digest has new editon member National Free Flight Society already know about maybe didnt notice Anyhow thought Id let couple issues slip before saying much about itjust sure really goingto happen Due circumstances entirely within control got bungled somehow once again find myself role editor Western Hemishperes prestigious all-FreeFlight publication Free Flight familiarly known simply Digest Over years cover dates have slipped sub stantially behind dates publication will take some fancy footwork bit lying cheating catch up will have no effect number pages get per subscription dollar goal ever different editors have different ways going about maximize amount material members likely find interesting informative per square inch type will 17% smaller thing still easily readable Ad prices being juggled discourage overly-large ads make ad prices least cover cost publishing same time making no expensive modeler has few items peddle off lot good material inherited previous editor John Oldenkamp lot has received since can always use As always well need help can get draftingnothing fancyjust good clean pencil work Photographic journalistic cover age major meetsespecially Natswould help too Adult memberships including subscription cost $15 year $27 two persons 18 under $750 $1350 Send money Kit Soneson 8616 Maple Grove Ct Sacramento CA 95828 NFFS Model Year Free Flight Hall Fame awards 1981 National Free Flight Society proudly announces its traditional annual awards outstanding Free Flight models modelers Hall Fame awards include Maxwell Bassett introduced internal combustion engine competition Free Flight 1932 William LElTinger Berkeley Models developer manufacturer large number award-winning kits Duke Fox developed produced competition engines reason able price started trend toward hot fuels used today Joe Lucas deceased expert teacher writer model aviation Peck- PIyauers 5QxM PHONE 7143 46-6~ o 7144424636 August1981 129 PRESENTS BALSA STRIPPER A95 AT YOUR DEALER PRECISION STRIP WOOD TO x INS FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOLGREAT PRICE WINDSOR PROPELLER CO PO BOX 112WINDSOR CA 95492 RANDYS UNIFLOW STUNT TANKS PROFI L E*COMBAI* RAT* WIDE & NARROW WEDGE 2-- 6 oz Capacities Standard vent available CUSTOM BLEND FUEL 5--40%Nitro Send 25cents specs CAROLINA- TAFFINDER 8345 Delhi Road Charleston Hgts SC 29405 PATTERN AND 04e0 4 HIGH SPEED PROPELLERS Hok D IlY AIRSCREW CUSTOM HIGH PERFORMANCE MAPLE PROPELLERS Propeller designed using symmetrical profile Individually precision hand balanced Accurate airfoil pitch Only high quality straight grain Eastern Maple used 8~ X 6% FORMULA 14 iox 6 Oo liX lix, ilXS CUSTOM DESIGN UPON REQUE ST OrRECT SALES EU PROSOCTO 5034 CRYSTAL COURTAdd 5100 pe AIde f PAstas ad handlieg SANTA ROSA CA 95404 PHONE TO SAROSSACA RES ASH 0% TAO 13 LACEY M-1O PEANUT KITS $495 EACH LACEY M15COUGARMUSTANG PIETENPOLGIPSY MOTHZERO PIPER CUBGANAGOBIEMILES M15 ANDRESONDRUINE cOAIPIETE CATALOG $100 HARD TO FIND ACCESSORIES KITS AND S FOR RUBBER POWERED MODELS
Edition: Model Aviation - 1981/08
Page Numbers: 57, 58, 59, 127, 128, 129
e Stoy poses two Wasps flown T9 Nats Mike came second ravity Powered Free FlightTeamMike stan Stoy Bob Hayes Jr won National OHLG Team Challenge Photo Jim Raeder others author High-time winner Outdoor l-tLGliderat last years National Contest design can built specialized materials Author includes bushel good advice about planning training winning contests should know. hes won plentyOMike Stoy IN OUTDOOR Hand-Launched Glider compe tition consistency name game Wasp VI due its large size careful selection moments offers superb consistency thermaling ability nearly impossible beat planes contest performance impressive kinds weatherfrom light lift calm winds high winds super booming thermals people idea built-up Hand Launched Glider may seem like too much un necessary complication sport model probably true competition design concept offers several advantages major difference wing loading can achieved built-up structure real importance produces super-light airplane since too light plane impossible throw can build light planes less-thanlight wood Getting piece good C-grain wood 8-to 10-lb range lot easier finding same type wood 4- 6-lb range heavier wood also less likely contain wind checks will weaken light stuff using right weight wood built-up structure can produce plane lighter same plane built super-light piece wood solid wing no sacrifice strength design beginners model Its complexity makes bad choice anything other contest performance its large size requires fairly good throwing arm achieve reasonable altitude top-notch contest design looking plane will fill bill Construction Wood selection Wasp VI critical competition designs wing wood should C-grain 8 10 lb per cubic foot density preferable lighter strictly dead-air planes Both stabilizer rudder should 6- 8-lb B- C-grain wood fuselage should springy straight-grain spruce cant obtain wide enough piece wood wing can splice two narrower pieces True up edges joined straightedge razor blade Hold edges firmly together work board tape few strips masking tape perpendicular joint followed long strip 1-in masking tape running length jointon same side earlier strips Now flip wood over fold open along joint Run some white glue length joint lay wood flat work board masking tape side down Weight wood some dope bottles other weights wipe off glue squeezes out Let glue dry remove tape will have piece wide wood Begin cutting Out wing Splice spruce leading edge wing after soaking hot water few minutes Use masking tape pins hold place spruce will bend easier breaking pull firmly August 1981 57 keep tension bend around tip Plane wing rough airfoil shape sharp razor plane Follow sandpaper working 80 grit down 400 grit Form airfoil wing just building solid wing have finished sanding wing Cut out holes panels operation cutting square hole razor blade easiest method Cut dihedral breaks bevel dihedral angles Cut spar slot main panels note actually involves removing 1 / 16 wood main panels otherwise will match tips should pay particular atten tion getting slot vertical Cut out plywood spars check fit before gluing place Glue spars first glue ribs easiest way make ribs cut out rectangles 1/16 balsa rather cutting out airfoil shapes glue Sand airfoil ribs after place glue has dried Glue dihedral joints check lateral balance wing sand heavy tip until wing balanced Dope sand wing before covering tissue Using bright colored tissue wings will make plane easier spot lands Give wings several coats dope tissue necessary maintain strength wing using enough dope can let tissue sag reducing wings strength well-doped wing will also reduce chance wing warping will change trim Cut fuselage wing hold-down piece spruce Dont omit wing hold-down adds considerably strength fuselageto-wing joint major trouble spot some modelers Cut out sand stabilizer rudder Cut dethermalizerDT break line stabilizer round edges joint Tape stab back together drill holes thread hinges Sew hinges figure-eight pattern giving about three passes hinge Use ordinary sewing thread hinges Dont forget take tape off stab glue ends thread finish Attach stabilizer rudder fuselage being careful get alignment correct Again watching alignment glue wing wing hold-down finger grip Prepare hardware DT system install shown plans photos couple things watch installing DT system Dont use cyanoacry late glue hold DT line rear stab cyanoacrylate soaks thread stiffens short distance knot stiffened thread can hang up rear DT guide loop stop tail popping up Second gluing plywood stop top stab make sure room DT rubberband clear rudder stab pops up can also cause system fail crack rear rudder Trimming flying Bring glider balance CG epoxying piece lead nose filing away lead until glider balances fore-aft point shown plans Check plane over thoroughly warps head out flying field trimming procedure follows test glide plane until smooth glide obtained left-hand 58 Model Aviation After cutting rectangular W, .u true uurnurs re rounuea power sooi makes mis easy wing ribs cut 1/16 x p stock glued place cyanoacrylate Wing ribs trimmed glued place Sand airfoil ribs glue dries Tfle wasp uses pop-up aemnermallzer ace mne text mor details make thread hinges FULL-SIZE PLANS AVAILABLE . SEE PAGE 132 TIP LE LAMINATED I/16X I/H SPNIJCE WINS THICKNESS TAPERS FROM I/H AT CENTER TO I/IA AT TIP 116 BALSA RIBS II=ll GLB 1/4 C DRAIN BALSAtill. TISSUE COVEREDIll) 6 SPAR B SD SPRUCE E I/H BALSA FINGER REST LEWD NOSE WEIGRY FRONT 1/4 SIZE 5/B I/H TOP FIUDRE B TRREAO HINUESITYPI STABILIZER U LU I/IA B URAIN BALSA ST WARE GB WIRE 5 ROSA DI WIRE LINE GUIDES F1 WIRE ST HOOK CUT DOWN PIN 1/32 PLYWOOD STAB STOP I/H AWBINUM SMJFFER TORE US LB DACRON FISIIINO LINE ALUMINUM FOIL I/U SPRUCE WING ROLD DOWN LII CU FUSELAGE 4/B S S/4 SPRUCE -I WIRES NOOKWIRE UDIDE 'SANDPAPER FINGER URIP CUT DOWN PINST LINE ITO TAIL SIDE RUDDERPLO STAB STOP B LU 1/16 B GRAIN BALSA UT RUBBER BAND WIRE UT HOORIt, ST LINE ITO WIRE USISE circle about 50 60 feet diameter Adjust plane smooth launch transition warping aerodynamic surfaces required smooth launch transition achieved fine-trim glide moving CG position making initial flights throw about 60% power 450 angle slight right bank Once plane flying satisfaction work up about 90% power bring launch angle down 1Oo2Oo Throwing full power very close little risky accuracy decreases near full power results badly blown launches something cant afford contest Work outs practicing competing Handlaunched Glider flying largely athletic event Although can overcome some deficien cies throwing arm no will argue fact having good ann improves chances winning otthe best exercises br HLG throwing softball tennis ball cant find someone else throw find brick wall throw against few weeks before contest work doing large number repetitions about r Four five days before contest begin decreasing number throws increasing power until reach full power two days before day before contest few light throws loosen up dont heavy workout day contest dont throw gliders until after have loosened up Unquestionably best single way get shape contest practice improves shape ann importantly will make familar planes Consistency key must know exactly plane performs conditions means practicing windy days well dead air evening cant expect win outdoor contests getting thermals yet am continuaily amazed number people have never practiced picking air contest no place find out plane wont hold lift So practice picking Continued page 127 stan Toy iauncnes pracsce SIUIO NJflL1 athletic event author describes successful training regimen article August 1981 59 I4LUis Thike Stoj WINU SPAN SD INCHES WING AREA 7725 SD INCHES TOTAL WEIURT DES DRABSI35R OUNCES AIRFOIL FLAT BOTTOM1 54% RIUR POINT AT 27% OF CORD STAB UREA 22% OF WIND RUDDER AREA 5% OF WIND INCHES I/S I53DRAWN BY MIKE STOY S-ID75 SNUFFER TUBE ST RUBBER SAND ST FUSE ALUMINUM FOIL .alizer rubberband cut ballOonmore cOnsistent AE ROTRENDS LATEST NEW CREAM Tuned Pipe Coupler high-nitro appli cations Tested proven over 60% nitro closed canopy applications Super heat resistant MUST FOR RC BOATERS SIZES 1/2 ID x 5/32 waIl 5/8 ID x 5/32 waIl 3/4 ID x 3/16 wall 7/8 ID x 1/4 wall 1/2 ID x 5/32 waIl 5/8 ID x 5/32 wall 3/4 ID x 3/16 wall 7/8 ID x 1/4 waIl LENGTH 3 3 3 3 12 12 12 12 ULTRA BLUE Tuned Pipe Coupler Still best value general applica tions 5% nitro Available 1/2 5/8 & 3/4 ID 4 & 12 lengths LIST PRICE $199 229 329 499 795 895 1295 1895 Tuned Pipe COUPLER CLAMPSI Best method connecting tuned pipe couplers Will conduct heat like metal clamps ULTRA BLUE Tuned Pipe Coupler M IN /MAX 7/16 1/2 5/8 23/32 47/64 53/64 55/64 15/16 63/64 1-1/8 11/8 1-7/32 AMT 2/pkg 2/pkg 2/pkg 2/pkg 2/pkg 2/pkg FOR Exhaust Exhau St Most 20s Most 40s Most 60s Most 80s LIST PRICE $159 159 159 159 159 159 Send self-addressed Stamped envelope FREE catalog DEALER INQUIRY INVITED 7/El 0/REND PRODUCTS 44 West Prospect Street New Haven CT 06515 203 397 3755 Guardian fuel tank access Marc Warwa shanas Loire-Nieuport 42 uses single long hatch access throttle tank bellcrank arrangement possible because aft location belicrank particular model Blackburn Firecrest built Leon Ryktarsyk uses separate hatches engine tank access control system installed wing limited access possible after tank removal end result case model can accept changes repairs fuel system throttle control system damag ing model An added benefit ability inspect components correct problems early stage before cause loss score loss airplane art landing two official flights landing score amounting about 40% flight score landing important two factors important success ful landing first getting airplane deck within arresting area second getting hook engage arresting line stop airplane Assuming hook properly constructed adjusted see June column type approach holds secret success Getting plane deck arresting area takes bit practice since different type landing normal type CL modelers used Soft gentle landings must take second place precision landings latter little harder landing area 20 ft long model needs half three-quarters second pass com pletely over two ways land Carrier model illustrated photos accompanying article best way far achieve desired result approach deck level flight about 5-ft altitude point about 20 ft stern deck deck comes clearly view begin smooth descent will cause model hit deck about 8 10 ft past stern fourth fifth arresting line rate ofdescent landing loads equivalent dropping model onto its gear height about 12 model will land near-level attitude normal arrested landing almost certainty alternative landing nique fly over deck apply down elevator dive landing areareminiscent Kamikaze attack Such approaches familiar us doubt Carrier flier anywhere hasnt attempted natural reaction approach made too high fear losing five points missed landing approach overrides reason thought going around another approach disappears entirely usual result loss 50 100 points rather five would have resulted going around problem Kamikaze method the%tail last thing hit deck hook often doesnt get chance its job usual result prop shaft what left broken propeller badly deflected landing gear forced under arresting line model either stops its nose 50 points likely flipped its back 25 points model should end up its gear chance hook catching line reduced because severe bouncing results engine will have stopped go around impossible 0 points Patience key Success trophies usually go flier abandons bad approach necessary takes much certain 95-point landing next lap landing photos Bill Rutledges STOL Bearcat 1978 Nats good landing placed first Junior Profile RichardL Periy 416 WoodhillDrive Golds boro NC 27530 Wasp VI/Stoy Continued page 59 air get planes trimmed riding thermals different ways picking air contest Some common ones piggybacking thermal poles streamers bubbles cattails three systems rLiqhr 4ft 6edeI4611 $9900 DELIVERED VISA Four Folding Legs Wing lage Holders Add $400 Shipping Calif 8% Tax RAC Products408 274-1915 3200 Knightnwood Way S San Jose CA 95148 August1981 127 K FifE FANUS TIC NELSON 15 detailed brochure send 25 cents Kus torn Kraftsmanship PO Box 2699 Laguna Hills CA 92653 Ph 714 830-5162 Dealer inquiries invited IN STOCK FOR IMMEDIATE SHIPMENT New SUPER QUADRA $8995 BRISIGHELLA FLYWHEEL $10695 QUADRA REPAIR$1000 s KIORITZ engine 244 culn$18995 Jim Messers ERCOUPE KIT$21995 Jim Messers TOMAHAWK KIT$23995 Concepts BIG FLEET KIT $17995 P&W RADIAL ENGINES Fleet $2995 FIBERGLASS COWL Fleet$1995 BALSA & BASSWOOD sIzes 40% OFF /a SCALE plans QUADRA ERCOUPE TOMAHAWK SKYBOLT$2195 SUPER STEARMAN Godfrey$2495 STARDUSTER TOO C Brislghella $2995 COCKPIT KITS Ercoupe T-Hawk $1500 Stearman Fleet F4U J-3 Cub$1850 ME-log $1950 Citabrla Nosen $2495 24-Hour Service - Add $2SO postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706 Outstanding Big Scale Aerobatics * % STAND OFF SCALE SIZE * 92 WINGSPAN 1509 SQ IN * WEIGHT 19 21 LBS * FIBERGLAS COWL & WHEELPANTS * QUADRA ENGINE * AVAILABLE NOW * PRE $189 bh. BABE really BIG Wing span 53Area 464 sq Engine 30-40Radio 4-channel Send 60f literature other kits & accessories has advantages disadvantages Piggybacking tells exactly ther mal strong However requires run under plane going piggyback can quite feat windy day means frequently launch down wind plane goes out timers sight sooner Piggybacking also results quite few badly blown launches flier off balance hurry hasnt set himself properly launchas demonstrated 1978 Nats Bob Boyerwhowonthe event missed sixth max national record after running under another thermaling glider have bad launch Another problem piggy backing isnt always someone else air ready fly Thermal poles streamers allow stand place set up launch lessens problem bad launches Poles also eliminate need someone else air fly big disadvantage stream ers tell exactly thermal centered less indication strong using two poles can lessen problem somewhat big advan tage poles over bubbles poles work well windy days dont indicate very light lift Bubbles cattails show thermal fast going up also allow set up place prior launching dont require other planes air biggest disadvantage windy days bubbles break up blown ground system use isnt important knowing use well get contest again means going out setting up equipment getting someone else fly ATTENTION ERS 128 Model Aviation product review product review product review Unless have three hands Panavises Model 350 multi-purposeworkcenterisa alluring product gives Stand ard Base Model 300 tilts turns rotates desired work position Tray Base Mount Model 312 six individual trays hold small parts tools right want Self-Centering Extra Wide Opening Head Model 376 allows work objects up to9 in size well tiny hard-tohold things Panavise says Model 350 will find million uses workbench least Its ingenious product review product review product review AVAILABLE NOWtWoo UPF 7 SO-Arpo$2395 JB spoolal MK III 54 Mono 78 Sips Weight iSbn 2195 TsnI Air 2000 105 Clamrc Scele Bplone 23 lbs 2295 TnM 4000 99 Rodrel Eng Cloosic Sips 23 Sn 2295 Fnkkes DVII 55 Geoon WW Frghte ape 23 lbs 2495 Coming 5non Oopmth Pop 50 5rpe Sopscoh Ttipehoond 50 Toplano Woco ATO Lyjook VeoOo 90 Srplaoe Neoport 11 gebe 55 5pleno 35 Ocoln Fobbe 081 72 Triplono Plans shipped U PS Pairel Post Please add $300 postage handlino fastest service send pOstoi money order No C LID orders sent BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 212 337-6987 goat flights you practlce trimming plane contest should mentioned earlier check pattern different weather conditions particularly thermals big problem trimming large thermals some planes will spin Out single best remedy washin inboard tip twisting leading edge upward respect trailing edge trimming plane try get transitlon come out directly over head plane pointed wind flying crosswind downwind transition will put plane out timers sight sooneras well causing glider come out downwind thermaL Knowing exactly plane transitions important plan piggyback throw rising bubbles Another thing check trim plane DT mode purpose dethermalizer bring airplane down fast possible damage best accomplished plane outside thermal big problem swinging weight DTs allow plane continue circling after DT has activated have lost several planes DT went off swinging weight plane stayed thermal flew out sight stalling way big advantage pop-up stab trimmed properly will cause plane fly straight thereby leave thermal well kill glide dramatic demonstration occurred last years Three Rivers MI contest Stan Stoy Paul Shailor both hooked same thermal max late day Both planes DTed within couple seconds other Stans pop-up stab came down field pauls swinging weight flew QOS Solareraft presents 2 new fun flyers Sosar Dart 12 rubber powercd helicopter climbs over 251 $300 postage paid ready fly Slav Scamp 12 high performance free flyiog stick model $400 postage paid ready fly ssd cht*kor monet order tr Solareraft F)Ito h82santa Barbara A5111 IX aX mnqarrrc Ins ted Multi-Purpose Work Center Panavise Products 2850 E 29th St Long Beach CA 90806 EPOXY GLASS COWLS FOR NOSEN PICA SIB MORGAN BALSA USA PLA 77 CONCEPT FLEET HOSTEnER RCM T-CRAPT SHEBER irrs ft SCALE SUPER CUB POKKER 0-7 BOEING P- 12 P-26 P4B2 P4B4 SPARROW HAWK GEE BEE MOO Y MACBR/ENS TURBULENt CHRISTEN EAGLE BRISIGHELLAS STAROUSTER II E J3-BI BABY FLYBABY AIRCAMPER PILOT JUNGMANN 135 SCALE ft OTHERS WHEEL PANTS FOR CITABRIA STAROUSTERI P177S SKYBOLT LIBERTYSPORT CHRISTEN EAGLE PB E HA WE STEARMAN STINSON SR-B MULLIGAN ft OTHERS BRAZED Es HEAT-TREATED WIRE GEARSEsCABANES LARGE SCALE PLANS AvAILABLE DiscouNT ON COWL WHEN PLANS ARE PURCHASED Send SASE latest list supply Modelers fiberglass parts plansWrite call us T 8 D FIBERGLASS SPECIALTIES 30925 BLOCK GARDEN Cflv MI 4B135 PHONE 31 421-6358 LEADER IN SMALL AIRFOIL TECHNOLOGY MASTER AIRSCREW IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 came down lake Just few comments contests flying general go contest take three well-trimmed planes possibly can can tell personal experience nothing frustrating losing trimmed plane having no back-up ship Secondly since have DT plane use Again personal experience lighting DT surefire way hook thermal lose plane Let relate experience demonstrates results following suggestions 1975 Nats came within 24 seconds becoming first person win 25-year-old Tulsa Glue Dobbers Trophy twice trimmed glider didnt light DT watch plane disappear over Lake Charles blew launch trimmed back-up ship finished second Joe Mekina Finally remember Murphys Law anything can go wrong will secret have go wrong practice no watching things wont go wrong contest FF Duration/Meuser Continued page 61 basic idea fuse bums through wing hold-down rubberbands wing pops off model inasmuch string has provided keep body soul together being attached aft end fuselage some point near tip wing thing comes down rather well-behaved fashion fuse lage assembly hangs nose down suspended rapidly rotating wing P-30 rate descent just about right fast enough ensure its falling out boomers slow enough ensure its survival isnt quite simple seems few details require attention Swivels must provided accommodate rotation wing might have cope either horribly snarled line line actually being twisted two wing rubberbands must touch fuse squeeze tightly snuff out before does its duty wing pops off must such way string doesnt wrap around stab means DT line must pass over top stab must short enough cant slip under stab Light monofilament fishing line leader stock makes good line must swivel either end preferably both ends line should snap catch end conveni ence made swivel pins copying George Xenakis arrangement can buy neat little swivels snap catches stores selling fishing tackle NFFS news items NFFS Digest has new editon member National Free Flight Society already know about maybe didnt notice Anyhow thought Id let couple issues slip before saying much about itjust sure really goingto happen Due circumstances entirely within control got bungled somehow once again find myself role editor Western Hemishperes prestigious all-FreeFlight publication Free Flight familiarly known simply Digest Over years cover dates have slipped sub stantially behind dates publication will take some fancy footwork bit lying cheating catch up will have no effect number pages get per subscription dollar goal ever different editors have different ways going about maximize amount material members likely find interesting informative per square inch type will 17% smaller thing still easily readable Ad prices being juggled discourage overly-large ads make ad prices least cover cost publishing same time making no expensive modeler has few items peddle off lot good material inherited previous editor John Oldenkamp lot has received since can always use As always well need help can get draftingnothing fancyjust good clean pencil work Photographic journalistic cover age major meetsespecially Natswould help too Adult memberships including subscription cost $15 year $27 two persons 18 under $750 $1350 Send money Kit Soneson 8616 Maple Grove Ct Sacramento CA 95828 NFFS Model Year Free Flight Hall Fame awards 1981 National Free Flight Society proudly announces its traditional annual awards outstanding Free Flight models modelers Hall Fame awards include Maxwell Bassett introduced internal combustion engine competition Free Flight 1932 William LElTinger Berkeley Models developer manufacturer large number award-winning kits Duke Fox developed produced competition engines reason able price started trend toward hot fuels used today Joe Lucas deceased expert teacher writer model aviation Peck- PIyauers 5QxM PHONE 7143 46-6~ o 7144424636 August1981 129 PRESENTS BALSA STRIPPER A95 AT YOUR DEALER PRECISION STRIP WOOD TO x INS FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOLGREAT PRICE WINDSOR PROPELLER CO PO BOX 112WINDSOR CA 95492 RANDYS UNIFLOW STUNT TANKS PROFI L E*COMBAI* RAT* WIDE & NARROW WEDGE 2-- 6 oz Capacities Standard vent available CUSTOM BLEND FUEL 5--40%Nitro Send 25cents specs CAROLINA- TAFFINDER 8345 Delhi Road Charleston Hgts SC 29405 PATTERN AND 04e0 4 HIGH SPEED PROPELLERS Hok D IlY AIRSCREW CUSTOM HIGH PERFORMANCE MAPLE PROPELLERS Propeller designed using symmetrical profile Individually precision hand balanced Accurate airfoil pitch Only high quality straight grain Eastern Maple used 8~ X 6% FORMULA 14 iox 6 Oo liX lix, ilXS CUSTOM DESIGN UPON REQUE ST OrRECT SALES EU PROSOCTO 5034 CRYSTAL COURTAdd 5100 pe AIde f PAstas ad handlieg SANTA ROSA CA 95404 PHONE TO SAROSSACA RES ASH 0% TAO 13 LACEY M-1O PEANUT KITS $495 EACH LACEY M15COUGARMUSTANG PIETENPOLGIPSY MOTHZERO PIPER CUBGANAGOBIEMILES M15 ANDRESONDRUINE cOAIPIETE CATALOG $100 HARD TO FIND ACCESSORIES KITS AND S FOR RUBBER POWERED MODELS
Edition: Model Aviation - 1981/08
Page Numbers: 57, 58, 59, 127, 128, 129
e Stoy poses two Wasps flown T9 Nats Mike came second ravity Powered Free FlightTeamMike stan Stoy Bob Hayes Jr won National OHLG Team Challenge Photo Jim Raeder others author High-time winner Outdoor l-tLGliderat last years National Contest design can built specialized materials Author includes bushel good advice about planning training winning contests should know. hes won plentyOMike Stoy IN OUTDOOR Hand-Launched Glider compe tition consistency name game Wasp VI due its large size careful selection moments offers superb consistency thermaling ability nearly impossible beat planes contest performance impressive kinds weatherfrom light lift calm winds high winds super booming thermals people idea built-up Hand Launched Glider may seem like too much un necessary complication sport model probably true competition design concept offers several advantages major difference wing loading can achieved built-up structure real importance produces super-light airplane since too light plane impossible throw can build light planes less-thanlight wood Getting piece good C-grain wood 8-to 10-lb range lot easier finding same type wood 4- 6-lb range heavier wood also less likely contain wind checks will weaken light stuff using right weight wood built-up structure can produce plane lighter same plane built super-light piece wood solid wing no sacrifice strength design beginners model Its complexity makes bad choice anything other contest performance its large size requires fairly good throwing arm achieve reasonable altitude top-notch contest design looking plane will fill bill Construction Wood selection Wasp VI critical competition designs wing wood should C-grain 8 10 lb per cubic foot density preferable lighter strictly dead-air planes Both stabilizer rudder should 6- 8-lb B- C-grain wood fuselage should springy straight-grain spruce cant obtain wide enough piece wood wing can splice two narrower pieces True up edges joined straightedge razor blade Hold edges firmly together work board tape few strips masking tape perpendicular joint followed long strip 1-in masking tape running length jointon same side earlier strips Now flip wood over fold open along joint Run some white glue length joint lay wood flat work board masking tape side down Weight wood some dope bottles other weights wipe off glue squeezes out Let glue dry remove tape will have piece wide wood Begin cutting Out wing Splice spruce leading edge wing after soaking hot water few minutes Use masking tape pins hold place spruce will bend easier breaking pull firmly August 1981 57 keep tension bend around tip Plane wing rough airfoil shape sharp razor plane Follow sandpaper working 80 grit down 400 grit Form airfoil wing just building solid wing have finished sanding wing Cut out holes panels operation cutting square hole razor blade easiest method Cut dihedral breaks bevel dihedral angles Cut spar slot main panels note actually involves removing 1 / 16 wood main panels otherwise will match tips should pay particular atten tion getting slot vertical Cut out plywood spars check fit before gluing place Glue spars first glue ribs easiest way make ribs cut out rectangles 1/16 balsa rather cutting out airfoil shapes glue Sand airfoil ribs after place glue has dried Glue dihedral joints check lateral balance wing sand heavy tip until wing balanced Dope sand wing before covering tissue Using bright colored tissue wings will make plane easier spot lands Give wings several coats dope tissue necessary maintain strength wing using enough dope can let tissue sag reducing wings strength well-doped wing will also reduce chance wing warping will change trim Cut fuselage wing hold-down piece spruce Dont omit wing hold-down adds considerably strength fuselageto-wing joint major trouble spot some modelers Cut out sand stabilizer rudder Cut dethermalizerDT break line stabilizer round edges joint Tape stab back together drill holes thread hinges Sew hinges figure-eight pattern giving about three passes hinge Use ordinary sewing thread hinges Dont forget take tape off stab glue ends thread finish Attach stabilizer rudder fuselage being careful get alignment correct Again watching alignment glue wing wing hold-down finger grip Prepare hardware DT system install shown plans photos couple things watch installing DT system Dont use cyanoacry late glue hold DT line rear stab cyanoacrylate soaks thread stiffens short distance knot stiffened thread can hang up rear DT guide loop stop tail popping up Second gluing plywood stop top stab make sure room DT rubberband clear rudder stab pops up can also cause system fail crack rear rudder Trimming flying Bring glider balance CG epoxying piece lead nose filing away lead until glider balances fore-aft point shown plans Check plane over thoroughly warps head out flying field trimming procedure follows test glide plane until smooth glide obtained left-hand 58 Model Aviation After cutting rectangular W, .u true uurnurs re rounuea power sooi makes mis easy wing ribs cut 1/16 x p stock glued place cyanoacrylate Wing ribs trimmed glued place Sand airfoil ribs glue dries Tfle wasp uses pop-up aemnermallzer ace mne text mor details make thread hinges FULL-SIZE PLANS AVAILABLE . SEE PAGE 132 TIP LE LAMINATED I/16X I/H SPNIJCE WINS THICKNESS TAPERS FROM I/H AT CENTER TO I/IA AT TIP 116 BALSA RIBS II=ll GLB 1/4 C DRAIN BALSAtill. TISSUE COVEREDIll) 6 SPAR B SD SPRUCE E I/H BALSA FINGER REST LEWD NOSE WEIGRY FRONT 1/4 SIZE 5/B I/H TOP FIUDRE B TRREAO HINUESITYPI STABILIZER U LU I/IA B URAIN BALSA ST WARE GB WIRE 5 ROSA DI WIRE LINE GUIDES F1 WIRE ST HOOK CUT DOWN PIN 1/32 PLYWOOD STAB STOP I/H AWBINUM SMJFFER TORE US LB DACRON FISIIINO LINE ALUMINUM FOIL I/U SPRUCE WING ROLD DOWN LII CU FUSELAGE 4/B S S/4 SPRUCE -I WIRES NOOKWIRE UDIDE 'SANDPAPER FINGER URIP CUT DOWN PINST LINE ITO TAIL SIDE RUDDERPLO STAB STOP B LU 1/16 B GRAIN BALSA UT RUBBER BAND WIRE UT HOORIt, ST LINE ITO WIRE USISE circle about 50 60 feet diameter Adjust plane smooth launch transition warping aerodynamic surfaces required smooth launch transition achieved fine-trim glide moving CG position making initial flights throw about 60% power 450 angle slight right bank Once plane flying satisfaction work up about 90% power bring launch angle down 1Oo2Oo Throwing full power very close little risky accuracy decreases near full power results badly blown launches something cant afford contest Work outs practicing competing Handlaunched Glider flying largely athletic event Although can overcome some deficien cies throwing arm no will argue fact having good ann improves chances winning otthe best exercises br HLG throwing softball tennis ball cant find someone else throw find brick wall throw against few weeks before contest work doing large number repetitions about r Four five days before contest begin decreasing number throws increasing power until reach full power two days before day before contest few light throws loosen up dont heavy workout day contest dont throw gliders until after have loosened up Unquestionably best single way get shape contest practice improves shape ann importantly will make familar planes Consistency key must know exactly plane performs conditions means practicing windy days well dead air evening cant expect win outdoor contests getting thermals yet am continuaily amazed number people have never practiced picking air contest no place find out plane wont hold lift So practice picking Continued page 127 stan Toy iauncnes pracsce SIUIO NJflL1 athletic event author describes successful training regimen article August 1981 59 I4LUis Thike Stoj WINU SPAN SD INCHES WING AREA 7725 SD INCHES TOTAL WEIURT DES DRABSI35R OUNCES AIRFOIL FLAT BOTTOM1 54% RIUR POINT AT 27% OF CORD STAB UREA 22% OF WIND RUDDER AREA 5% OF WIND INCHES I/S I53DRAWN BY MIKE STOY S-ID75 SNUFFER TUBE ST RUBBER SAND ST FUSE ALUMINUM FOIL .alizer rubberband cut ballOonmore cOnsistent AE ROTRENDS LATEST NEW CREAM Tuned Pipe Coupler high-nitro appli cations Tested proven over 60% nitro closed canopy applications Super heat resistant MUST FOR RC BOATERS SIZES 1/2 ID x 5/32 waIl 5/8 ID x 5/32 waIl 3/4 ID x 3/16 wall 7/8 ID x 1/4 wall 1/2 ID x 5/32 waIl 5/8 ID x 5/32 wall 3/4 ID x 3/16 wall 7/8 ID x 1/4 waIl LENGTH 3 3 3 3 12 12 12 12 ULTRA BLUE Tuned Pipe Coupler Still best value general applica tions 5% nitro Available 1/2 5/8 & 3/4 ID 4 & 12 lengths LIST PRICE $199 229 329 499 795 895 1295 1895 Tuned Pipe COUPLER CLAMPSI Best method connecting tuned pipe couplers Will conduct heat like metal clamps ULTRA BLUE Tuned Pipe Coupler M IN /MAX 7/16 1/2 5/8 23/32 47/64 53/64 55/64 15/16 63/64 1-1/8 11/8 1-7/32 AMT 2/pkg 2/pkg 2/pkg 2/pkg 2/pkg 2/pkg FOR Exhaust Exhau St Most 20s Most 40s Most 60s Most 80s LIST PRICE $159 159 159 159 159 159 Send self-addressed Stamped envelope FREE catalog DEALER INQUIRY INVITED 7/El 0/REND PRODUCTS 44 West Prospect Street New Haven CT 06515 203 397 3755 Guardian fuel tank access Marc Warwa shanas Loire-Nieuport 42 uses single long hatch access throttle tank bellcrank arrangement possible because aft location belicrank particular model Blackburn Firecrest built Leon Ryktarsyk uses separate hatches engine tank access control system installed wing limited access possible after tank removal end result case model can accept changes repairs fuel system throttle control system damag ing model An added benefit ability inspect components correct problems early stage before cause loss score loss airplane art landing two official flights landing score amounting about 40% flight score landing important two factors important success ful landing first getting airplane deck within arresting area second getting hook engage arresting line stop airplane Assuming hook properly constructed adjusted see June column type approach holds secret success Getting plane deck arresting area takes bit practice since different type landing normal type CL modelers used Soft gentle landings must take second place precision landings latter little harder landing area 20 ft long model needs half three-quarters second pass com pletely over two ways land Carrier model illustrated photos accompanying article best way far achieve desired result approach deck level flight about 5-ft altitude point about 20 ft stern deck deck comes clearly view begin smooth descent will cause model hit deck about 8 10 ft past stern fourth fifth arresting line rate ofdescent landing loads equivalent dropping model onto its gear height about 12 model will land near-level attitude normal arrested landing almost certainty alternative landing nique fly over deck apply down elevator dive landing areareminiscent Kamikaze attack Such approaches familiar us doubt Carrier flier anywhere hasnt attempted natural reaction approach made too high fear losing five points missed landing approach overrides reason thought going around another approach disappears entirely usual result loss 50 100 points rather five would have resulted going around problem Kamikaze method the%tail last thing hit deck hook often doesnt get chance its job usual result prop shaft what left broken propeller badly deflected landing gear forced under arresting line model either stops its nose 50 points likely flipped its back 25 points model should end up its gear chance hook catching line reduced because severe bouncing results engine will have stopped go around impossible 0 points Patience key Success trophies usually go flier abandons bad approach necessary takes much certain 95-point landing next lap landing photos Bill Rutledges STOL Bearcat 1978 Nats good landing placed first Junior Profile RichardL Periy 416 WoodhillDrive Golds boro NC 27530 Wasp VI/Stoy Continued page 59 air get planes trimmed riding thermals different ways picking air contest Some common ones piggybacking thermal poles streamers bubbles cattails three systems rLiqhr 4ft 6edeI4611 $9900 DELIVERED VISA Four Folding Legs Wing lage Holders Add $400 Shipping Calif 8% Tax RAC Products408 274-1915 3200 Knightnwood Way S San Jose CA 95148 August1981 127 K FifE FANUS TIC NELSON 15 detailed brochure send 25 cents Kus torn Kraftsmanship PO Box 2699 Laguna Hills CA 92653 Ph 714 830-5162 Dealer inquiries invited IN STOCK FOR IMMEDIATE SHIPMENT New SUPER QUADRA $8995 BRISIGHELLA FLYWHEEL $10695 QUADRA REPAIR$1000 s KIORITZ engine 244 culn$18995 Jim Messers ERCOUPE KIT$21995 Jim Messers TOMAHAWK KIT$23995 Concepts BIG FLEET KIT $17995 P&W RADIAL ENGINES Fleet $2995 FIBERGLASS COWL Fleet$1995 BALSA & BASSWOOD sIzes 40% OFF /a SCALE plans QUADRA ERCOUPE TOMAHAWK SKYBOLT$2195 SUPER STEARMAN Godfrey$2495 STARDUSTER TOO C Brislghella $2995 COCKPIT KITS Ercoupe T-Hawk $1500 Stearman Fleet F4U J-3 Cub$1850 ME-log $1950 Citabrla Nosen $2495 24-Hour Service - Add $2SO postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706 Outstanding Big Scale Aerobatics * % STAND OFF SCALE SIZE * 92 WINGSPAN 1509 SQ IN * WEIGHT 19 21 LBS * FIBERGLAS COWL & WHEELPANTS * QUADRA ENGINE * AVAILABLE NOW * PRE $189 bh. BABE really BIG Wing span 53Area 464 sq Engine 30-40Radio 4-channel Send 60f literature other kits & accessories has advantages disadvantages Piggybacking tells exactly ther mal strong However requires run under plane going piggyback can quite feat windy day means frequently launch down wind plane goes out timers sight sooner Piggybacking also results quite few badly blown launches flier off balance hurry hasnt set himself properly launchas demonstrated 1978 Nats Bob Boyerwhowonthe event missed sixth max national record after running under another thermaling glider have bad launch Another problem piggy backing isnt always someone else air ready fly Thermal poles streamers allow stand place set up launch lessens problem bad launches Poles also eliminate need someone else air fly big disadvantage stream ers tell exactly thermal centered less indication strong using two poles can lessen problem somewhat big advan tage poles over bubbles poles work well windy days dont indicate very light lift Bubbles cattails show thermal fast going up also allow set up place prior launching dont require other planes air biggest disadvantage windy days bubbles break up blown ground system use isnt important knowing use well get contest again means going out setting up equipment getting someone else fly ATTENTION ERS 128 Model Aviation product review product review product review Unless have three hands Panavises Model 350 multi-purposeworkcenterisa alluring product gives Stand ard Base Model 300 tilts turns rotates desired work position Tray Base Mount Model 312 six individual trays hold small parts tools right want Self-Centering Extra Wide Opening Head Model 376 allows work objects up to9 in size well tiny hard-tohold things Panavise says Model 350 will find million uses workbench least Its ingenious product review product review product review AVAILABLE NOWtWoo UPF 7 SO-Arpo$2395 JB spoolal MK III 54 Mono 78 Sips Weight iSbn 2195 TsnI Air 2000 105 Clamrc Scele Bplone 23 lbs 2295 TnM 4000 99 Rodrel Eng Cloosic Sips 23 Sn 2295 Fnkkes DVII 55 Geoon WW Frghte ape 23 lbs 2495 Coming 5non Oopmth Pop 50 5rpe Sopscoh Ttipehoond 50 Toplano Woco ATO Lyjook VeoOo 90 Srplaoe Neoport 11 gebe 55 5pleno 35 Ocoln Fobbe 081 72 Triplono Plans shipped U PS Pairel Post Please add $300 postage handlino fastest service send pOstoi money order No C LID orders sent BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 212 337-6987 goat flights you practlce trimming plane contest should mentioned earlier check pattern different weather conditions particularly thermals big problem trimming large thermals some planes will spin Out single best remedy washin inboard tip twisting leading edge upward respect trailing edge trimming plane try get transitlon come out directly over head plane pointed wind flying crosswind downwind transition will put plane out timers sight sooneras well causing glider come out downwind thermaL Knowing exactly plane transitions important plan piggyback throw rising bubbles Another thing check trim plane DT mode purpose dethermalizer bring airplane down fast possible damage best accomplished plane outside thermal big problem swinging weight DTs allow plane continue circling after DT has activated have lost several planes DT went off swinging weight plane stayed thermal flew out sight stalling way big advantage pop-up stab trimmed properly will cause plane fly straight thereby leave thermal well kill glide dramatic demonstration occurred last years Three Rivers MI contest Stan Stoy Paul Shailor both hooked same thermal max late day Both planes DTed within couple seconds other Stans pop-up stab came down field pauls swinging weight flew QOS Solareraft presents 2 new fun flyers Sosar Dart 12 rubber powercd helicopter climbs over 251 $300 postage paid ready fly Slav Scamp 12 high performance free flyiog stick model $400 postage paid ready fly ssd cht*kor monet order tr Solareraft F)Ito h82santa Barbara A5111 IX aX mnqarrrc Ins ted Multi-Purpose Work Center Panavise Products 2850 E 29th St Long Beach CA 90806 EPOXY GLASS COWLS FOR NOSEN PICA SIB MORGAN BALSA USA PLA 77 CONCEPT FLEET HOSTEnER RCM T-CRAPT SHEBER irrs ft SCALE SUPER CUB POKKER 0-7 BOEING P- 12 P-26 P4B2 P4B4 SPARROW HAWK GEE BEE MOO Y MACBR/ENS TURBULENt CHRISTEN EAGLE BRISIGHELLAS STAROUSTER II E J3-BI BABY FLYBABY AIRCAMPER PILOT JUNGMANN 135 SCALE ft OTHERS WHEEL PANTS FOR CITABRIA STAROUSTERI P177S SKYBOLT LIBERTYSPORT CHRISTEN EAGLE PB E HA WE STEARMAN STINSON SR-B MULLIGAN ft OTHERS BRAZED Es HEAT-TREATED WIRE GEARSEsCABANES LARGE SCALE PLANS AvAILABLE DiscouNT ON COWL WHEN PLANS ARE PURCHASED Send SASE latest list supply Modelers fiberglass parts plansWrite call us T 8 D FIBERGLASS SPECIALTIES 30925 BLOCK GARDEN Cflv MI 4B135 PHONE 31 421-6358 LEADER IN SMALL AIRFOIL TECHNOLOGY MASTER AIRSCREW IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 came down lake Just few comments contests flying general go contest take three well-trimmed planes possibly can can tell personal experience nothing frustrating losing trimmed plane having no back-up ship Secondly since have DT plane use Again personal experience lighting DT surefire way hook thermal lose plane Let relate experience demonstrates results following suggestions 1975 Nats came within 24 seconds becoming first person win 25-year-old Tulsa Glue Dobbers Trophy twice trimmed glider didnt light DT watch plane disappear over Lake Charles blew launch trimmed back-up ship finished second Joe Mekina Finally remember Murphys Law anything can go wrong will secret have go wrong practice no watching things wont go wrong contest FF Duration/Meuser Continued page 61 basic idea fuse bums through wing hold-down rubberbands wing pops off model inasmuch string has provided keep body soul together being attached aft end fuselage some point near tip wing thing comes down rather well-behaved fashion fuse lage assembly hangs nose down suspended rapidly rotating wing P-30 rate descent just about right fast enough ensure its falling out boomers slow enough ensure its survival isnt quite simple seems few details require attention Swivels must provided accommodate rotation wing might have cope either horribly snarled line line actually being twisted two wing rubberbands must touch fuse squeeze tightly snuff out before does its duty wing pops off must such way string doesnt wrap around stab means DT line must pass over top stab must short enough cant slip under stab Light monofilament fishing line leader stock makes good line must swivel either end preferably both ends line should snap catch end conveni ence made swivel pins copying George Xenakis arrangement can buy neat little swivels snap catches stores selling fishing tackle NFFS news items NFFS Digest has new editon member National Free Flight Society already know about maybe didnt notice Anyhow thought Id let couple issues slip before saying much about itjust sure really goingto happen Due circumstances entirely within control got bungled somehow once again find myself role editor Western Hemishperes prestigious all-FreeFlight publication Free Flight familiarly known simply Digest Over years cover dates have slipped sub stantially behind dates publication will take some fancy footwork bit lying cheating catch up will have no effect number pages get per subscription dollar goal ever different editors have different ways going about maximize amount material members likely find interesting informative per square inch type will 17% smaller thing still easily readable Ad prices being juggled discourage overly-large ads make ad prices least cover cost publishing same time making no expensive modeler has few items peddle off lot good material inherited previous editor John Oldenkamp lot has received since can always use As always well need help can get draftingnothing fancyjust good clean pencil work Photographic journalistic cover age major meetsespecially Natswould help too Adult memberships including subscription cost $15 year $27 two persons 18 under $750 $1350 Send money Kit Soneson 8616 Maple Grove Ct Sacramento CA 95828 NFFS Model Year Free Flight Hall Fame awards 1981 National Free Flight Society proudly announces its traditional annual awards outstanding Free Flight models modelers Hall Fame awards include Maxwell Bassett introduced internal combustion engine competition Free Flight 1932 William LElTinger Berkeley Models developer manufacturer large number award-winning kits Duke Fox developed produced competition engines reason able price started trend toward hot fuels used today Joe Lucas deceased expert teacher writer model aviation Peck- PIyauers 5QxM PHONE 7143 46-6~ o 7144424636 August1981 129 PRESENTS BALSA STRIPPER A95 AT YOUR DEALER PRECISION STRIP WOOD TO x INS FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOLGREAT PRICE WINDSOR PROPELLER CO PO BOX 112WINDSOR CA 95492 RANDYS UNIFLOW STUNT TANKS PROFI L E*COMBAI* RAT* WIDE & NARROW WEDGE 2-- 6 oz Capacities Standard vent available CUSTOM BLEND FUEL 5--40%Nitro Send 25cents specs CAROLINA- TAFFINDER 8345 Delhi Road Charleston Hgts SC 29405 PATTERN AND 04e0 4 HIGH SPEED PROPELLERS Hok D IlY AIRSCREW CUSTOM HIGH PERFORMANCE MAPLE PROPELLERS Propeller designed using symmetrical profile Individually precision hand balanced Accurate airfoil pitch Only high quality straight grain Eastern Maple used 8~ X 6% FORMULA 14 iox 6 Oo liX lix, ilXS CUSTOM DESIGN UPON REQUE ST OrRECT SALES EU PROSOCTO 5034 CRYSTAL COURTAdd 5100 pe AIde f PAstas ad handlieg SANTA ROSA CA 95404 PHONE TO SAROSSACA RES ASH 0% TAO 13 LACEY M-1O PEANUT KITS $495 EACH LACEY M15COUGARMUSTANG PIETENPOLGIPSY MOTHZERO PIPER CUBGANAGOBIEMILES M15 ANDRESONDRUINE cOAIPIETE CATALOG $100 HARD TO FIND ACCESSORIES KITS AND S FOR RUBBER POWERED MODELS
Edition: Model Aviation - 1981/08
Page Numbers: 57, 58, 59, 127, 128, 129
e Stoy poses two Wasps flown T9 Nats Mike came second ravity Powered Free FlightTeamMike stan Stoy Bob Hayes Jr won National OHLG Team Challenge Photo Jim Raeder others author High-time winner Outdoor l-tLGliderat last years National Contest design can built specialized materials Author includes bushel good advice about planning training winning contests should know. hes won plentyOMike Stoy IN OUTDOOR Hand-Launched Glider compe tition consistency name game Wasp VI due its large size careful selection moments offers superb consistency thermaling ability nearly impossible beat planes contest performance impressive kinds weatherfrom light lift calm winds high winds super booming thermals people idea built-up Hand Launched Glider may seem like too much un necessary complication sport model probably true competition design concept offers several advantages major difference wing loading can achieved built-up structure real importance produces super-light airplane since too light plane impossible throw can build light planes less-thanlight wood Getting piece good C-grain wood 8-to 10-lb range lot easier finding same type wood 4- 6-lb range heavier wood also less likely contain wind checks will weaken light stuff using right weight wood built-up structure can produce plane lighter same plane built super-light piece wood solid wing no sacrifice strength design beginners model Its complexity makes bad choice anything other contest performance its large size requires fairly good throwing arm achieve reasonable altitude top-notch contest design looking plane will fill bill Construction Wood selection Wasp VI critical competition designs wing wood should C-grain 8 10 lb per cubic foot density preferable lighter strictly dead-air planes Both stabilizer rudder should 6- 8-lb B- C-grain wood fuselage should springy straight-grain spruce cant obtain wide enough piece wood wing can splice two narrower pieces True up edges joined straightedge razor blade Hold edges firmly together work board tape few strips masking tape perpendicular joint followed long strip 1-in masking tape running length jointon same side earlier strips Now flip wood over fold open along joint Run some white glue length joint lay wood flat work board masking tape side down Weight wood some dope bottles other weights wipe off glue squeezes out Let glue dry remove tape will have piece wide wood Begin cutting Out wing Splice spruce leading edge wing after soaking hot water few minutes Use masking tape pins hold place spruce will bend easier breaking pull firmly August 1981 57 keep tension bend around tip Plane wing rough airfoil shape sharp razor plane Follow sandpaper working 80 grit down 400 grit Form airfoil wing just building solid wing have finished sanding wing Cut out holes panels operation cutting square hole razor blade easiest method Cut dihedral breaks bevel dihedral angles Cut spar slot main panels note actually involves removing 1 / 16 wood main panels otherwise will match tips should pay particular atten tion getting slot vertical Cut out plywood spars check fit before gluing place Glue spars first glue ribs easiest way make ribs cut out rectangles 1/16 balsa rather cutting out airfoil shapes glue Sand airfoil ribs after place glue has dried Glue dihedral joints check lateral balance wing sand heavy tip until wing balanced Dope sand wing before covering tissue Using bright colored tissue wings will make plane easier spot lands Give wings several coats dope tissue necessary maintain strength wing using enough dope can let tissue sag reducing wings strength well-doped wing will also reduce chance wing warping will change trim Cut fuselage wing hold-down piece spruce Dont omit wing hold-down adds considerably strength fuselageto-wing joint major trouble spot some modelers Cut out sand stabilizer rudder Cut dethermalizerDT break line stabilizer round edges joint Tape stab back together drill holes thread hinges Sew hinges figure-eight pattern giving about three passes hinge Use ordinary sewing thread hinges Dont forget take tape off stab glue ends thread finish Attach stabilizer rudder fuselage being careful get alignment correct Again watching alignment glue wing wing hold-down finger grip Prepare hardware DT system install shown plans photos couple things watch installing DT system Dont use cyanoacry late glue hold DT line rear stab cyanoacrylate soaks thread stiffens short distance knot stiffened thread can hang up rear DT guide loop stop tail popping up Second gluing plywood stop top stab make sure room DT rubberband clear rudder stab pops up can also cause system fail crack rear rudder Trimming flying Bring glider balance CG epoxying piece lead nose filing away lead until glider balances fore-aft point shown plans Check plane over thoroughly warps head out flying field trimming procedure follows test glide plane until smooth glide obtained left-hand 58 Model Aviation After cutting rectangular W, .u true uurnurs re rounuea power sooi makes mis easy wing ribs cut 1/16 x p stock glued place cyanoacrylate Wing ribs trimmed glued place Sand airfoil ribs glue dries Tfle wasp uses pop-up aemnermallzer ace mne text mor details make thread hinges FULL-SIZE PLANS AVAILABLE . SEE PAGE 132 TIP LE LAMINATED I/16X I/H SPNIJCE WINS THICKNESS TAPERS FROM I/H AT CENTER TO I/IA AT TIP 116 BALSA RIBS II=ll GLB 1/4 C DRAIN BALSAtill. TISSUE COVEREDIll) 6 SPAR B SD SPRUCE E I/H BALSA FINGER REST LEWD NOSE WEIGRY FRONT 1/4 SIZE 5/B I/H TOP FIUDRE B TRREAO HINUESITYPI STABILIZER U LU I/IA B URAIN BALSA ST WARE GB WIRE 5 ROSA DI WIRE LINE GUIDES F1 WIRE ST HOOK CUT DOWN PIN 1/32 PLYWOOD STAB STOP I/H AWBINUM SMJFFER TORE US LB DACRON FISIIINO LINE ALUMINUM FOIL I/U SPRUCE WING ROLD DOWN LII CU FUSELAGE 4/B S S/4 SPRUCE -I WIRES NOOKWIRE UDIDE 'SANDPAPER FINGER URIP CUT DOWN PINST LINE ITO TAIL SIDE RUDDERPLO STAB STOP B LU 1/16 B GRAIN BALSA UT RUBBER BAND WIRE UT HOORIt, ST LINE ITO WIRE USISE circle about 50 60 feet diameter Adjust plane smooth launch transition warping aerodynamic surfaces required smooth launch transition achieved fine-trim glide moving CG position making initial flights throw about 60% power 450 angle slight right bank Once plane flying satisfaction work up about 90% power bring launch angle down 1Oo2Oo Throwing full power very close little risky accuracy decreases near full power results badly blown launches something cant afford contest Work outs practicing competing Handlaunched Glider flying largely athletic event Although can overcome some deficien cies throwing arm no will argue fact having good ann improves chances winning otthe best exercises br HLG throwing softball tennis ball cant find someone else throw find brick wall throw against few weeks before contest work doing large number repetitions about r Four five days before contest begin decreasing number throws increasing power until reach full power two days before day before contest few light throws loosen up dont heavy workout day contest dont throw gliders until after have loosened up Unquestionably best single way get shape contest practice improves shape ann importantly will make familar planes Consistency key must know exactly plane performs conditions means practicing windy days well dead air evening cant expect win outdoor contests getting thermals yet am continuaily amazed number people have never practiced picking air contest no place find out plane wont hold lift So practice picking Continued page 127 stan Toy iauncnes pracsce SIUIO NJflL1 athletic event author describes successful training regimen article August 1981 59 I4LUis Thike Stoj WINU SPAN SD INCHES WING AREA 7725 SD INCHES TOTAL WEIURT DES DRABSI35R OUNCES AIRFOIL FLAT BOTTOM1 54% RIUR POINT AT 27% OF CORD STAB UREA 22% OF WIND RUDDER AREA 5% OF WIND INCHES I/S I53DRAWN BY MIKE STOY S-ID75 SNUFFER TUBE ST RUBBER SAND ST FUSE ALUMINUM FOIL .alizer rubberband cut ballOonmore cOnsistent AE ROTRENDS LATEST NEW CREAM Tuned Pipe Coupler high-nitro appli cations Tested proven over 60% nitro closed canopy applications Super heat resistant MUST FOR RC BOATERS SIZES 1/2 ID x 5/32 waIl 5/8 ID x 5/32 waIl 3/4 ID x 3/16 wall 7/8 ID x 1/4 wall 1/2 ID x 5/32 waIl 5/8 ID x 5/32 wall 3/4 ID x 3/16 wall 7/8 ID x 1/4 waIl LENGTH 3 3 3 3 12 12 12 12 ULTRA BLUE Tuned Pipe Coupler Still best value general applica tions 5% nitro Available 1/2 5/8 & 3/4 ID 4 & 12 lengths LIST PRICE $199 229 329 499 795 895 1295 1895 Tuned Pipe COUPLER CLAMPSI Best method connecting tuned pipe couplers Will conduct heat like metal clamps ULTRA BLUE Tuned Pipe Coupler M IN /MAX 7/16 1/2 5/8 23/32 47/64 53/64 55/64 15/16 63/64 1-1/8 11/8 1-7/32 AMT 2/pkg 2/pkg 2/pkg 2/pkg 2/pkg 2/pkg FOR Exhaust Exhau St Most 20s Most 40s Most 60s Most 80s LIST PRICE $159 159 159 159 159 159 Send self-addressed Stamped envelope FREE catalog DEALER INQUIRY INVITED 7/El 0/REND PRODUCTS 44 West Prospect Street New Haven CT 06515 203 397 3755 Guardian fuel tank access Marc Warwa shanas Loire-Nieuport 42 uses single long hatch access throttle tank bellcrank arrangement possible because aft location belicrank particular model Blackburn Firecrest built Leon Ryktarsyk uses separate hatches engine tank access control system installed wing limited access possible after tank removal end result case model can accept changes repairs fuel system throttle control system damag ing model An added benefit ability inspect components correct problems early stage before cause loss score loss airplane art landing two official flights landing score amounting about 40% flight score landing important two factors important success ful landing first getting airplane deck within arresting area second getting hook engage arresting line stop airplane Assuming hook properly constructed adjusted see June column type approach holds secret success Getting plane deck arresting area takes bit practice since different type landing normal type CL modelers used Soft gentle landings must take second place precision landings latter little harder landing area 20 ft long model needs half three-quarters second pass com pletely over two ways land Carrier model illustrated photos accompanying article best way far achieve desired result approach deck level flight about 5-ft altitude point about 20 ft stern deck deck comes clearly view begin smooth descent will cause model hit deck about 8 10 ft past stern fourth fifth arresting line rate ofdescent landing loads equivalent dropping model onto its gear height about 12 model will land near-level attitude normal arrested landing almost certainty alternative landing nique fly over deck apply down elevator dive landing areareminiscent Kamikaze attack Such approaches familiar us doubt Carrier flier anywhere hasnt attempted natural reaction approach made too high fear losing five points missed landing approach overrides reason thought going around another approach disappears entirely usual result loss 50 100 points rather five would have resulted going around problem Kamikaze method the%tail last thing hit deck hook often doesnt get chance its job usual result prop shaft what left broken propeller badly deflected landing gear forced under arresting line model either stops its nose 50 points likely flipped its back 25 points model should end up its gear chance hook catching line reduced because severe bouncing results engine will have stopped go around impossible 0 points Patience key Success trophies usually go flier abandons bad approach necessary takes much certain 95-point landing next lap landing photos Bill Rutledges STOL Bearcat 1978 Nats good landing placed first Junior Profile RichardL Periy 416 WoodhillDrive Golds boro NC 27530 Wasp VI/Stoy Continued page 59 air get planes trimmed riding thermals different ways picking air contest Some common ones piggybacking thermal poles streamers bubbles cattails three systems rLiqhr 4ft 6edeI4611 $9900 DELIVERED VISA Four Folding Legs Wing lage Holders Add $400 Shipping Calif 8% Tax RAC Products408 274-1915 3200 Knightnwood Way S San Jose CA 95148 August1981 127 K FifE FANUS TIC NELSON 15 detailed brochure send 25 cents Kus torn Kraftsmanship PO Box 2699 Laguna Hills CA 92653 Ph 714 830-5162 Dealer inquiries invited IN STOCK FOR IMMEDIATE SHIPMENT New SUPER QUADRA $8995 BRISIGHELLA FLYWHEEL $10695 QUADRA REPAIR$1000 s KIORITZ engine 244 culn$18995 Jim Messers ERCOUPE KIT$21995 Jim Messers TOMAHAWK KIT$23995 Concepts BIG FLEET KIT $17995 P&W RADIAL ENGINES Fleet $2995 FIBERGLASS COWL Fleet$1995 BALSA & BASSWOOD sIzes 40% OFF /a SCALE plans QUADRA ERCOUPE TOMAHAWK SKYBOLT$2195 SUPER STEARMAN Godfrey$2495 STARDUSTER TOO C Brislghella $2995 COCKPIT KITS Ercoupe T-Hawk $1500 Stearman Fleet F4U J-3 Cub$1850 ME-log $1950 Citabrla Nosen $2495 24-Hour Service - Add $2SO postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706 Outstanding Big Scale Aerobatics * % STAND OFF SCALE SIZE * 92 WINGSPAN 1509 SQ IN * WEIGHT 19 21 LBS * FIBERGLAS COWL & WHEELPANTS * QUADRA ENGINE * AVAILABLE NOW * PRE $189 bh. BABE really BIG Wing span 53Area 464 sq Engine 30-40Radio 4-channel Send 60f literature other kits & accessories has advantages disadvantages Piggybacking tells exactly ther mal strong However requires run under plane going piggyback can quite feat windy day means frequently launch down wind plane goes out timers sight sooner Piggybacking also results quite few badly blown launches flier off balance hurry hasnt set himself properly launchas demonstrated 1978 Nats Bob Boyerwhowonthe event missed sixth max national record after running under another thermaling glider have bad launch Another problem piggy backing isnt always someone else air ready fly Thermal poles streamers allow stand place set up launch lessens problem bad launches Poles also eliminate need someone else air fly big disadvantage stream ers tell exactly thermal centered less indication strong using two poles can lessen problem somewhat big advan tage poles over bubbles poles work well windy days dont indicate very light lift Bubbles cattails show thermal fast going up also allow set up place prior launching dont require other planes air biggest disadvantage windy days bubbles break up blown ground system use isnt important knowing use well get contest again means going out setting up equipment getting someone else fly ATTENTION ERS 128 Model Aviation product review product review product review Unless have three hands Panavises Model 350 multi-purposeworkcenterisa alluring product gives Stand ard Base Model 300 tilts turns rotates desired work position Tray Base Mount Model 312 six individual trays hold small parts tools right want Self-Centering Extra Wide Opening Head Model 376 allows work objects up to9 in size well tiny hard-tohold things Panavise says Model 350 will find million uses workbench least Its ingenious product review product review product review AVAILABLE NOWtWoo UPF 7 SO-Arpo$2395 JB spoolal MK III 54 Mono 78 Sips Weight iSbn 2195 TsnI Air 2000 105 Clamrc Scele Bplone 23 lbs 2295 TnM 4000 99 Rodrel Eng Cloosic Sips 23 Sn 2295 Fnkkes DVII 55 Geoon WW Frghte ape 23 lbs 2495 Coming 5non Oopmth Pop 50 5rpe Sopscoh Ttipehoond 50 Toplano Woco ATO Lyjook VeoOo 90 Srplaoe Neoport 11 gebe 55 5pleno 35 Ocoln Fobbe 081 72 Triplono Plans shipped U PS Pairel Post Please add $300 postage handlino fastest service send pOstoi money order No C LID orders sent BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 212 337-6987 goat flights you practlce trimming plane contest should mentioned earlier check pattern different weather conditions particularly thermals big problem trimming large thermals some planes will spin Out single best remedy washin inboard tip twisting leading edge upward respect trailing edge trimming plane try get transitlon come out directly over head plane pointed wind flying crosswind downwind transition will put plane out timers sight sooneras well causing glider come out downwind thermaL Knowing exactly plane transitions important plan piggyback throw rising bubbles Another thing check trim plane DT mode purpose dethermalizer bring airplane down fast possible damage best accomplished plane outside thermal big problem swinging weight DTs allow plane continue circling after DT has activated have lost several planes DT went off swinging weight plane stayed thermal flew out sight stalling way big advantage pop-up stab trimmed properly will cause plane fly straight thereby leave thermal well kill glide dramatic demonstration occurred last years Three Rivers MI contest Stan Stoy Paul Shailor both hooked same thermal max late day Both planes DTed within couple seconds other Stans pop-up stab came down field pauls swinging weight flew QOS Solareraft presents 2 new fun flyers Sosar Dart 12 rubber powercd helicopter climbs over 251 $300 postage paid ready fly Slav Scamp 12 high performance free flyiog stick model $400 postage paid ready fly ssd cht*kor monet order tr Solareraft F)Ito h82santa Barbara A5111 IX aX mnqarrrc Ins ted Multi-Purpose Work Center Panavise Products 2850 E 29th St Long Beach CA 90806 EPOXY GLASS COWLS FOR NOSEN PICA SIB MORGAN BALSA USA PLA 77 CONCEPT FLEET HOSTEnER RCM T-CRAPT SHEBER irrs ft SCALE SUPER CUB POKKER 0-7 BOEING P- 12 P-26 P4B2 P4B4 SPARROW HAWK GEE BEE MOO Y MACBR/ENS TURBULENt CHRISTEN EAGLE BRISIGHELLAS STAROUSTER II E J3-BI BABY FLYBABY AIRCAMPER PILOT JUNGMANN 135 SCALE ft OTHERS WHEEL PANTS FOR CITABRIA STAROUSTERI P177S SKYBOLT LIBERTYSPORT CHRISTEN EAGLE PB E HA WE STEARMAN STINSON SR-B MULLIGAN ft OTHERS BRAZED Es HEAT-TREATED WIRE GEARSEsCABANES LARGE SCALE PLANS AvAILABLE DiscouNT ON COWL WHEN PLANS ARE PURCHASED Send SASE latest list supply Modelers fiberglass parts plansWrite call us T 8 D FIBERGLASS SPECIALTIES 30925 BLOCK GARDEN Cflv MI 4B135 PHONE 31 421-6358 LEADER IN SMALL AIRFOIL TECHNOLOGY MASTER AIRSCREW IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 came down lake Just few comments contests flying general go contest take three well-trimmed planes possibly can can tell personal experience nothing frustrating losing trimmed plane having no back-up ship Secondly since have DT plane use Again personal experience lighting DT surefire way hook thermal lose plane Let relate experience demonstrates results following suggestions 1975 Nats came within 24 seconds becoming first person win 25-year-old Tulsa Glue Dobbers Trophy twice trimmed glider didnt light DT watch plane disappear over Lake Charles blew launch trimmed back-up ship finished second Joe Mekina Finally remember Murphys Law anything can go wrong will secret have go wrong practice no watching things wont go wrong contest FF Duration/Meuser Continued page 61 basic idea fuse bums through wing hold-down rubberbands wing pops off model inasmuch string has provided keep body soul together being attached aft end fuselage some point near tip wing thing comes down rather well-behaved fashion fuse lage assembly hangs nose down suspended rapidly rotating wing P-30 rate descent just about right fast enough ensure its falling out boomers slow enough ensure its survival isnt quite simple seems few details require attention Swivels must provided accommodate rotation wing might have cope either horribly snarled line line actually being twisted two wing rubberbands must touch fuse squeeze tightly snuff out before does its duty wing pops off must such way string doesnt wrap around stab means DT line must pass over top stab must short enough cant slip under stab Light monofilament fishing line leader stock makes good line must swivel either end preferably both ends line should snap catch end conveni ence made swivel pins copying George Xenakis arrangement can buy neat little swivels snap catches stores selling fishing tackle NFFS news items NFFS Digest has new editon member National Free Flight Society already know about maybe didnt notice Anyhow thought Id let couple issues slip before saying much about itjust sure really goingto happen Due circumstances entirely within control got bungled somehow once again find myself role editor Western Hemishperes prestigious all-FreeFlight publication Free Flight familiarly known simply Digest Over years cover dates have slipped sub stantially behind dates publication will take some fancy footwork bit lying cheating catch up will have no effect number pages get per subscription dollar goal ever different editors have different ways going about maximize amount material members likely find interesting informative per square inch type will 17% smaller thing still easily readable Ad prices being juggled discourage overly-large ads make ad prices least cover cost publishing same time making no expensive modeler has few items peddle off lot good material inherited previous editor John Oldenkamp lot has received since can always use As always well need help can get draftingnothing fancyjust good clean pencil work Photographic journalistic cover age major meetsespecially Natswould help too Adult memberships including subscription cost $15 year $27 two persons 18 under $750 $1350 Send money Kit Soneson 8616 Maple Grove Ct Sacramento CA 95828 NFFS Model Year Free Flight Hall Fame awards 1981 National Free Flight Society proudly announces its traditional annual awards outstanding Free Flight models modelers Hall Fame awards include Maxwell Bassett introduced internal combustion engine competition Free Flight 1932 William LElTinger Berkeley Models developer manufacturer large number award-winning kits Duke Fox developed produced competition engines reason able price started trend toward hot fuels used today Joe Lucas deceased expert teacher writer model aviation Peck- PIyauers 5QxM PHONE 7143 46-6~ o 7144424636 August1981 129 PRESENTS BALSA STRIPPER A95 AT YOUR DEALER PRECISION STRIP WOOD TO x INS FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOLGREAT PRICE WINDSOR PROPELLER CO PO BOX 112WINDSOR CA 95492 RANDYS UNIFLOW STUNT TANKS PROFI L E*COMBAI* RAT* WIDE & NARROW WEDGE 2-- 6 oz Capacities Standard vent available CUSTOM BLEND FUEL 5--40%Nitro Send 25cents specs CAROLINA- TAFFINDER 8345 Delhi Road Charleston Hgts SC 29405 PATTERN AND 04e0 4 HIGH SPEED PROPELLERS Hok D IlY AIRSCREW CUSTOM HIGH PERFORMANCE MAPLE PROPELLERS Propeller designed using symmetrical profile Individually precision hand balanced Accurate airfoil pitch Only high quality straight grain Eastern Maple used 8~ X 6% FORMULA 14 iox 6 Oo liX lix, ilXS CUSTOM DESIGN UPON REQUE ST OrRECT SALES EU PROSOCTO 5034 CRYSTAL COURTAdd 5100 pe AIde f PAstas ad handlieg SANTA ROSA CA 95404 PHONE TO SAROSSACA RES ASH 0% TAO 13 LACEY M-1O PEANUT KITS $495 EACH LACEY M15COUGARMUSTANG PIETENPOLGIPSY MOTHZERO PIPER CUBGANAGOBIEMILES M15 ANDRESONDRUINE cOAIPIETE CATALOG $100 HARD TO FIND ACCESSORIES KITS AND S FOR RUBBER POWERED MODELS