68 Model Aviation winter events thermals nonexis tent early models nearly 300 sq wing huge propellers making like Indoor models Wakefields class given FAI recog nition designation Flu COUPE DHIVER pronounced dee vair means Winter Cup class model originated France 1944 sim pler alternative Wakefield fact style has often referred /2 Wake Originally designed flown Top The completed Winter Hawk its propel ler blades folded flight mode rest tween flights model has simple struc ture allows fast building repairs clean low-drag shape Above au thor demonstrating motor winding setup good stooge winder torque meter big help reducing contest hassles Winter Hawks wing uses turbulatea okoIov airtoll wing area 164 sq pect ratio 131 small gurney flap used left tip panel maintain flat left glide Winter Hawk t A41 -U f winter hawk primarily white bird na tive Scandinavian countries also found other parts northern Europe As Coupe dHiver grew popularity inevitably came flown summer well summer winds thermals caused problems designs light wing loadings slow climbing characteristics Being difficult DT de thermalize thermals models often lost Sometimes moderate winds dashed ground before could gain enough altitude Consequently evolution has away light wing loadings slow climb much Wakefield-like performance appear ance todays breed small fastclimbing Coupe capable winning com petitions hot summer days moderate winds wont win under conditions added prowess compromise must made using latest technology reli able model also wanted plane could come out top calm days no thermals present Bob White has such model Beau Coupe shied away complicated wing structure curved tips Also carving efficient propeller seemed difficult task found simpler approach harness ing lot new ideas available compo nents came up just model wantedquick-building clean-lined competitive Winter Hawk im mediate success awarded Ft Worth Planesmens Best New Design 1983 has won placed contests since model has accumulated some 20 trophies won Open Coupe 1987 Nats Lincoln NE Basic specifications Winter Hawk follows wing uses tur bulated Sokolov airfoil has area 164 sq aspect ratio 131 small gurney flap used left tip panel maintain flat left glide helps keep thermals propeller uses very effi cient precarved blades available Blue Ridge Models also uses torque-sen sitive prop stop eliminates rubber bunching improves transition climb glide Overall its clean lowdrag shape still meets 31-sq-in cross section requirement model has simple design features allow fast build ing repairs Fuselage Make body single piece /16 sheet balsa light grained 3 x 36 sheet first tapered slightly aft 24 width 1% /6 x 24-in triangle removed side Seal inside two coats thick nitrate dope allowing about two hours beNamed after hawk native Scandinavian countries contest-winning Coupe dHiver evolved some novel ideas ingenius use available materials EJohn R ODwyer tween coats After second coat dry immerse sheet hot water bath tub about 10 minutes balsa starts curling tube wet tube slid onto round mandrel approximately 10 diameter found old pool cue almost perfect Wrap tube Ace bandage other cloth thats similarly stretchy porous Allow day thorough drying body tube drying build wing mount pylon Use three 2/2 x 3-in pieces lightweight even-grained /16 balsa sheet Edge glue together using CyA cyanoacrylate glue 9-in strip grain running vertical Apply coat dope exact center inside will help forming around two ribs shape pylon can transfer con tour ribs plan first Xe roxing paper ironing shape onto balsa sheet Transfer wing stabilizer contours same way two pylon ribs assem March 1990 69 Left The propeller hubs #8 left #9 right number eight hub uses wheel collars secure propeller blades #9 lighter has less drag spinner carved basswood Right Close-up view hub #9 showing simple spinner adapter hubs include best features several different designs Complete construction operating details contained text plans bled two bulkheads form short winglike structure Center long 9-in strip nose about % strip below rib side will attached fuselage Make ply wood wing mount snuffer tube dont mount point Remove th body tube mandrel dry Starting front working toward rear carefully join seam CyA Sand smooth apply coat sanding sealer Sand again lightly wrap tube layer Japanese tissue Use thinned dope adhere tissue smoothing out wrinkles Though will have removed later attachment points various compo nentseg pylon rear rubber support band tail partsits easier apply tissue now rather later building sequence tissue easily removed lightly cutting shape excised brushing thinner area Cut bottom pylon roughly shape finish rubbing fore aft piece 180-grit sandpaper wrapped around body tube Sand seal py lon cover Japanese tissue tach pylon body tube loca tion shown plans tube seam bottom Fin rudder stabilizer DT system Construction fairly straightforward aft spar fin should long enough protrude slightly through bottom strengthen attachment fin should line up vertically pylon flat side fin airfoil parallel body tube centerline Dont attempt stall DT dethermalizer line until glue inside tube fin spar thor oughly dry little sandwich assembly rear could incorporate aluminum tube Teflon has less friction weighs less glue holding forward DT guide dry 12-lb monofilament line fed forward tube until comes out open rear end body tube Slide line tube sandwich assembly Fit latter notch cut upper side body tube carefully glue place short piece A6 aluminum tube used secure end loops DT line squeezing pliers after correct length set stab assembly will have com pleted prior installation Although 600 tilt stabilizer dethermalized position rather extreme its necessary ensure model will fall out ther mal use small nylon screws tail trim adjustments may seem little com plicated theyre much precise re liable shims trim tabs Youll ap preciate extra effort required 2-56 nylon screws FAI Model Supply slightly oversized hold settings very well something isnt true metal screws heavyweight aluminum foil heat sink should tight fit snuffer tube conduct heat away efficiently foil glued pylon tube ce mented place small S-hook formed end open closed end forward loop DT line will help easily re placing small rubberband before flight nose body tube reinforced one-inch-wide band silk nylon graphite cloth liberally coated fiveminute epoxy After epoxy hard cut off nose correct down- sidethrust angles An adjustable protractortriangle great help Cut three small notches front end shown drawing Recoat front edge little epoxy Add small balsa bullet shape rear end unit finished 70 Model Aviation Above Close-up details elevator trim adjusting screw dethermalizer line rear sandwich assembly Right Details rudder adjusting screw rubberband tensions rud der left stabilizer rubberband hoiddowna right wing pylon plywood wing mounting saddle installed Note dethermalizer fuse rubberband heat shield snuffer tube Also note ply-reinforced rear motor peg simple effective motor-restraining system consists pin locked two notches fuselage pressure wound motor until propeller installed Full-Size Plans Available Page 188 - -jANID NC LEFT [DOING ___ F- REP SND SO irITNISSO _____________ I SWE RIP I~CC PEE ___________ 5p5ARE MW L NLR DEENKS SI-OSNA TIRACE SIZE N ROE ODWINE 555 SNE ONNSCRWROICSCRE P SIRE RENDER MOURNING FIN STANRODE rSNANs2D1 DCI NIRS IILI — IEEIRNNELSNPPLRI ANON DIEs- ONES BRIAN _ --- ---s-- PoSE DOSE TSP V EDO/ F SRRREWNRENSS CNN 5 ERON IRSIRE LICNONNO DION7CNDRCE S ED AREURM SINSSSCENTER ONES/SLEINOS sSNN ASS NE 5015550A-AfiDC NOR OSLEFON CO oEDS SIREI / /ES LIRE s-OILS C PR/CSON SNOBOC ROSENINA N OR -5SAN R CAREER MMCS WDT2TEC HAWK COANPE DFUSELAGE SITE V CA S$EDO555 SAC CNSS EDEN NNIS RELODCNN N RANDN N525NANN SNES DLDENLCENEBEE POWERED R RUPEES RESMCNRSERDBION MOREL TEN ION NBC C SON NO ES ACER OEVESES Wing Again fairly straightforward con struction techniques used Make tem plate 22 identical wing ribs trac ing Xerox copy made previously largest rib onto piece aluminum /32 plywood Use template cut out ribs Orient template slightly nose-down wood grain grain paral lel edges narrow rear end rib Stack 22 ribs short piece 46-sq stock upper spar groove sand out imperfections Use sanding block front back edges same length Build two center wing panels first Cover plans wax paper prevent sticking Tak glue small pieces A2 balsa forward edge trailing edge bot tom surface holds proper gle airfoil shape Pin length /6-sq stock plans forward trailing edge rib back ends rest strip tached glue Two ribs used locate leading edge since depending much sanding done ribs up ends its location may ex actly match shown plans Make dime-sized puddle CyA off side Dip leading trailing end rib puddle locate rib tween leading trailing edges Make sure rib straight installed center ribs tilted 70 Add top /16 spar gussets latter very important strengthening thin ribs Note gussets small 30 x 60W triangles grain parallel hypot enuse Remove pins front back edges lift wing panel wax paper Add lower /I6 spar A2 balsa sheeting leading edge easier size install panel free plan Repin panel plan outer end pinned down line tip panel center rib raised 3/2 surface Glue leading trailing edges spars A2 balsa sheeting directly center panel build out board tip panels vertical-grained spar webs joint should tight fit against transi tion rib Sand wing half correct leading trailing edge shape Its easier now both halves joined center panel pinned build ing board trial fit other panel center supporting shown plan Some sanding may necessary match rib surfaces satisfied glue panels together add /2-in-wide strip silk graphite reinforcing cloth over top joint Remove structure board add spar webs have some CyA few 6-in-long strands graphite glass fiber bottom side leading trailing edges top spar across center jointContinued page 185 March 1990 71 CASNES REP tSPRS{INU 5NNN REE /1 SZtONWs-.[DAD PS SOPS ~ZZZDDDONDs- AID ON 50CRDtVZAONClit NSEIlDSN 1111 1D5551is DUDOENS DDRPDN -IDDSSOANIONEs \DIO SDP ROTCDIN PECE-7IDC CRC RI j ODINNLN tttR ROSNNLNMCNS CS DOE Left The completely assembled propeller assembly showing l/6lfl dowel upper notch nose Right very important feature Free Flight ship No matter fail-safe dethermalizer might monster thermal can still carry QOS label identifies ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AMA Membership15 Ace Radio Control5 Aerospace Composite Prod55 Airtronics2 20 AI-Tec & Su-pr-line Products166 Altech MarketingCoy 2 170 American Jr Aircraft Co18 American Small Busn Computers1 Applied Engineering47 Authorized RC Service49 B&P Associates57 BLB168 Quay Barber Models182 Blue Ridge Mach & Tools153 Bolar Hell Research152 Bridi Aircraft140 Dave Brown Products31 Byron Originals87 Ca Ra Products55 Cambridge Model Aircraft8 Campbell Tools Co147 Cheveron168 Cleveland Model Supply16 Competition Products186 Corehouse161 Cove rite166 Cox Hobbies93 Crenshaw Aero57 Culpepper Models Inc184 Cygnet Software12 D&R Aircraft Mfg51 DGA Designs146 Daedalus Research Inc172 Davy Systems Corp153 Dodgson Designs38 Doylejet152 Du-Bro Products Inc96 Duracraft55 FAI Model Supply156 FHS Supply Inc22-23 Fiberglass Master4 Fiorenze Hobby Center146 First RC Flight School153 Flyline Models12 Fourmost Products49 Fults Dual Struts184 Futaba Corp America19 88 G&A Products152 GM Plastics Inc47 57 158 GM Precision Products37 Garuda Gliders147 Gator RC Products43 Carl Goldberg Models13 106 Golden Gate Hobbies174 Phillip Good145 Gorham Model Products173 Great Planes21 Hi Line Ltd176 High Sky180 Hobby Barn142-143 Hobby Dynamics 10 12 18 85 94-95 105 Hobby Horn20 Hobby Lobby International162-165 Hobby Supply South180 Hobby Woods8 Bob Holman Plans156 Ikon Northwest Co141 Indy RC Sales Ac148-150 JCM Company145 JR Radios10 94-95105 JTec182 JammAero144 Jan Crystals20 Larry Jolly Model Products158 Jomar8 K&B Mfg152 K&S Engineering151 K-Flight Industries156 Kingsway Enterprises146 Kraft Midwest51 Kustom Kraftsmanship176 LA Model Hobby Show159 Lanier RC51 Lone Star Models147 MACS Products140 MGA Enterprises144 Memphis Model Market160 Micro Mark6-7 Midwest Products101 Model Rectifier CorpCoy 3 Sid Morgan Plans186 Walt Moucha Models175 Mutchlers Hobbies154-155 NF Video Library31 Northeast Aerodynamics4 Northern Modeling Products38 Northwest Hobby Supply9 Ohio Superstar53 Pacer Tech167 Paper Airplanes Intl173 Parrish Aircraft151 Pattern Tek53 Penn Valley Hobby Center157 Performance Products Ultd174 Performance Specialties174 Pica Products16 Pin-Nik Sales172 Plane Video18 Pro-Tune Corp140 Progress Mfg Co144 RAM182 RC Buyers Guide183 RC Designs176 RC Extras186 RC International17 RC Video Review157 RJL Industries161 Radial Engine Technologies43 Ragan/Barker Group156 Red Max Fuel22-23 Reichmuth Electronics152 Robart11 Rons Model Building144 Rossi USA103 RounTuit57 SAC44 SR Batteries145 Sachs TG186 Safety Plus16 47 Satellite City187 Scale Model Research146 Scale Plans & Photo Ser144 Sermos RC Snap Connectors184 Shamrock Competition Imports171 Sheldons Hobby Shop146 Sig Mfg Co4 83 181 Simple Simon Airplane Co182 Square Cut Tools174 Smith Enterprises181 Stangel Enterprises180 Sun Craft157 Superior Aircraft37 Swanson Assoc176 T&D Fiberglass Spec172 TEAM160 Tatone Products Co55 Tidewater Hobby Enterprises168 Toledo RC Exposition156 Top Flite Models Inc169 Tower Hobbies177-179 Tru-Turn152 US Quadra166 Ultimatesport RC160 VL Products161 Vinylwrite Custom Lettering172 WE Technical Services184 Webra18 Williams Brothers49 Windsor Propeller Co53 Wing Mfg158 World EnginesCover 4 Yashioka12 85 Nick Ziroli Models44 ers use 40-size engines stock mufflers draw common fuel source Rac ing heats four theyre scored two ways finish position after 10 laps first through fourth best lap time Again large number umps officials needed conduct race Fifteen-year-old Jerret Cangie Redmont WA red-hot devotee Unfortu nately Jerret mechanic/flier Bill Petterson Seattle flooded engine failed start up within required 90second window following signal young men told practice lo cal contests about two weeks Diametrically opposite adrenalin scale seems docile Free Flight Scale models both indoor outdoor types aircraft very care fully judged realism fidelity workmanship indicates patience supreme As always Free Flight Scale vari ety great Rubber gas power mod ern antique aircraftwhat treat view such exceptionally fine building skills also envy small boxes needed transport lovely creations Nats like banqueta huge crowd SAFE FLYING IS NO ACCIDENT responding advertisers mention read about ModelAviation diners well regiment servers cooks dishwashers staff gets neither wages nor tips Vince Mankowski quartermaster general headwaiter chief cook bottle washer etc etcarranged little compensation form din ner loyal army DJ old-time music us old folks tripping light fantastic heartwarming touch Vince whatever happened dessert Winter Hawk/ODwyer Continued page 71 Prepare wing covering painting tissue attaches two coats sand ing sealer sanding lightly between coats March 1990 185 OUT OF THE ASHES .. INTO THE IWNNERS CIRCLE PHOENIX T FOR ADOmONAI INFORMATION SEND LSASE greatly improves Japanese tissue adherence Cover bottom surface first good grade Japanese tissue type supplied Peck-Polymers works very well experi ence Attach tissue thick dope rib bottom spar assure accurate lower contour Nitrate thinner brush used slightly release adhering dope pull out wrinkles After wing fin stabilizer com pletely covered spray water shrink taut brush two coats nitrate dope Thin nitrate one-to-one plasticize few drops TCP castor oil before applying Allow dope cure several days check warps No washin washout used gurney flap left tip panel seems eliminate need special warps Steam flat twists present makes wing much easier check prior flying ses sion Propeller Though propeller assembly may appear complicated first really isnt unique prop stop mechanism combines best features several other systems de serves much credit Winter Hawks winning ways convince try Ill list some features mechanism torque actuated tension sensitive rubber motor torque drops about in/oz lever engages tack head stop rotation motor can several inches shorter distance between rear peg prop shaft hook eliminates unpredict able center-of-gravity shifts due rubber bunching end proprun short mo tor also prevents prop assembly falling out would cause disqualification parts SPAN 132 AREA 1047 SQ IN WEIGHT 72- 76 OZ AtAFOIL 54061 WiNGLOAD 10 OZ/SQ FT ASPECT RATIO 1671 COMPETITION PRODUCTS 921 BIRDIE WAY APOLLO BEACH FL 33672 813 648 6171 Sachs Dolmar Engines Customized TG Only 100% SACHS Engine 27 S $38000 31 $38000 34 *40000 37 *43000 42 $45000 add $50 throttle-coupled spark advance New TorqL Mow Engines Complel Nothing Bu See WRAM TOLEDO Shows TG MFG201 427-384 857 High Mtn Rd N Haledon NJ 0750 droppedand probable propeller loss FAL Model Supply Form contour airfoil Torque actuation actually saves altitude con- slight undercamber Its important remember trast tension-type propeller causes the edge greater curve leading nose drop prop slowly finishes last edge few turns torque-actuated prop folds shaped draw pencil line apex still pulling inner curve center tip lever can engaged onto tack head line should about /2 trailing edge prior attaching propeller wound motor its widest point forward surface Locate will prevent prop turning the blade wire line Y10 fold piv flier checks alignment looks indications ot shown drawing Draw around thermals lights fuse youre ready wire blade groove Out accept launch simply rotate hub backwards wire flush surface Use five-minute ep small amount until hear click pro- oxy / plywood doubler secure wire peller free turn use several clothespins clamp plywood un use system rubber-powered til epoxy sets Wakefields Mulvihills folding propel- blades held onto hub small lers has shown 100% reliability brass washers soldered end model make hub Winter Hawk first oh- can tolerate added weight /6-ID inside ditam aluminum Coupe hub FAI Model ameter wheel collars can used shown Supply Either leave huh full length 1% in- photo collars allow rapid blade replaceas shown photo cut off shown ment drawing reduce weight drag Remem- will note greatest blade area forher huh components drawing ward wire places center-of-pres shown twice actual size clarity sure forward elastic axis causing pitch half-size reduction area drawing increase under load gradually reduce local copy machine might help prevent torque decreases Slow-motion videotapes have big mistake confirmed effect also show need parts drawn accurate scale pre- turbulator strips prevent flutter HO modelvent confusion however dimen- railroad-scale 2 x 4-ft pieces basswood seem stoned Drill holes hand drill cut work great turhulator blades out X-Acto jewelers saw file Set blade pitch angle shown drawto shape 10 propeller assemblies ing Adjust angle twisting wire Track using mechanism probably no two ex- tips both tips same plane bend actly alike yet seem work well ing point blade wire acts stop other words stop mechanism does re- against aluminum hub apply dab red quire precision machining Montreal paint tip blade aid tracking type A spinner will protect hub mechanism propeller blades Blue Ridge Models reduce drag Being unable find suitable 1-intwisted very accurately obtain through dia plastic spinner made basswood R/C EXTRAS Introduces Clipped-Wing Taylorcratt 1/4 standoff scale hIgh aerobalic plane has 90 wingspan wes 90 -152 stroke 12- 164 stroke engine Detailed Plans Epoxy-Glass Cowl Hand-Cut Parts Excellent Hardware Pkg Price $20995 4*10 shippIng R/C EXTRAS 1404 Vandenberg Circle W Sergeant Bluff IA 51054 712-943-4102 186 Model Aviation VINTAUE It-C PLAN3 GONSOLIDAT PBY-5A CATALINA 9FT WING SPAN AtL RIBS B FULL FORMERI SHOWN ON PLANS11 PLAsTIC ENGCOWLS $1090 PR CLEAR GUN BLISTERS $ 760 PR 4 LARGE PLAN SHEETS s $1895 6FT WING SPAN MODEL PBY-5A ENGINE COWLS $750 PR Plans $1495 GUN BLISTERS $5SO PR ADD $300 POSTAGE cATALOGOVER 50 PLANS $100 DEALERS WRITE W 43WE SID MORGAN 13157 ORMOND BELLEVILLEMICH 48111 USA Mmjacltusof tie Exira 230 md Weeks Speelci plone Cash Money Orders Z
Edition: Model Aviation - 1990/03
Page Numbers: 68, 69, 70, 71, 185, 186
68 Model Aviation winter events thermals nonexis tent early models nearly 300 sq wing huge propellers making like Indoor models Wakefields class given FAI recog nition designation Flu COUPE DHIVER pronounced dee vair means Winter Cup class model originated France 1944 sim pler alternative Wakefield fact style has often referred /2 Wake Originally designed flown Top The completed Winter Hawk its propel ler blades folded flight mode rest tween flights model has simple struc ture allows fast building repairs clean low-drag shape Above au thor demonstrating motor winding setup good stooge winder torque meter big help reducing contest hassles Winter Hawks wing uses turbulatea okoIov airtoll wing area 164 sq pect ratio 131 small gurney flap used left tip panel maintain flat left glide Winter Hawk t A41 -U f winter hawk primarily white bird na tive Scandinavian countries also found other parts northern Europe As Coupe dHiver grew popularity inevitably came flown summer well summer winds thermals caused problems designs light wing loadings slow climbing characteristics Being difficult DT de thermalize thermals models often lost Sometimes moderate winds dashed ground before could gain enough altitude Consequently evolution has away light wing loadings slow climb much Wakefield-like performance appear ance todays breed small fastclimbing Coupe capable winning com petitions hot summer days moderate winds wont win under conditions added prowess compromise must made using latest technology reli able model also wanted plane could come out top calm days no thermals present Bob White has such model Beau Coupe shied away complicated wing structure curved tips Also carving efficient propeller seemed difficult task found simpler approach harness ing lot new ideas available compo nents came up just model wantedquick-building clean-lined competitive Winter Hawk im mediate success awarded Ft Worth Planesmens Best New Design 1983 has won placed contests since model has accumulated some 20 trophies won Open Coupe 1987 Nats Lincoln NE Basic specifications Winter Hawk follows wing uses tur bulated Sokolov airfoil has area 164 sq aspect ratio 131 small gurney flap used left tip panel maintain flat left glide helps keep thermals propeller uses very effi cient precarved blades available Blue Ridge Models also uses torque-sen sitive prop stop eliminates rubber bunching improves transition climb glide Overall its clean lowdrag shape still meets 31-sq-in cross section requirement model has simple design features allow fast build ing repairs Fuselage Make body single piece /16 sheet balsa light grained 3 x 36 sheet first tapered slightly aft 24 width 1% /6 x 24-in triangle removed side Seal inside two coats thick nitrate dope allowing about two hours beNamed after hawk native Scandinavian countries contest-winning Coupe dHiver evolved some novel ideas ingenius use available materials EJohn R ODwyer tween coats After second coat dry immerse sheet hot water bath tub about 10 minutes balsa starts curling tube wet tube slid onto round mandrel approximately 10 diameter found old pool cue almost perfect Wrap tube Ace bandage other cloth thats similarly stretchy porous Allow day thorough drying body tube drying build wing mount pylon Use three 2/2 x 3-in pieces lightweight even-grained /16 balsa sheet Edge glue together using CyA cyanoacrylate glue 9-in strip grain running vertical Apply coat dope exact center inside will help forming around two ribs shape pylon can transfer con tour ribs plan first Xe roxing paper ironing shape onto balsa sheet Transfer wing stabilizer contours same way two pylon ribs assem March 1990 69 Left The propeller hubs #8 left #9 right number eight hub uses wheel collars secure propeller blades #9 lighter has less drag spinner carved basswood Right Close-up view hub #9 showing simple spinner adapter hubs include best features several different designs Complete construction operating details contained text plans bled two bulkheads form short winglike structure Center long 9-in strip nose about % strip below rib side will attached fuselage Make ply wood wing mount snuffer tube dont mount point Remove th body tube mandrel dry Starting front working toward rear carefully join seam CyA Sand smooth apply coat sanding sealer Sand again lightly wrap tube layer Japanese tissue Use thinned dope adhere tissue smoothing out wrinkles Though will have removed later attachment points various compo nentseg pylon rear rubber support band tail partsits easier apply tissue now rather later building sequence tissue easily removed lightly cutting shape excised brushing thinner area Cut bottom pylon roughly shape finish rubbing fore aft piece 180-grit sandpaper wrapped around body tube Sand seal py lon cover Japanese tissue tach pylon body tube loca tion shown plans tube seam bottom Fin rudder stabilizer DT system Construction fairly straightforward aft spar fin should long enough protrude slightly through bottom strengthen attachment fin should line up vertically pylon flat side fin airfoil parallel body tube centerline Dont attempt stall DT dethermalizer line until glue inside tube fin spar thor oughly dry little sandwich assembly rear could incorporate aluminum tube Teflon has less friction weighs less glue holding forward DT guide dry 12-lb monofilament line fed forward tube until comes out open rear end body tube Slide line tube sandwich assembly Fit latter notch cut upper side body tube carefully glue place short piece A6 aluminum tube used secure end loops DT line squeezing pliers after correct length set stab assembly will have com pleted prior installation Although 600 tilt stabilizer dethermalized position rather extreme its necessary ensure model will fall out ther mal use small nylon screws tail trim adjustments may seem little com plicated theyre much precise re liable shims trim tabs Youll ap preciate extra effort required 2-56 nylon screws FAI Model Supply slightly oversized hold settings very well something isnt true metal screws heavyweight aluminum foil heat sink should tight fit snuffer tube conduct heat away efficiently foil glued pylon tube ce mented place small S-hook formed end open closed end forward loop DT line will help easily re placing small rubberband before flight nose body tube reinforced one-inch-wide band silk nylon graphite cloth liberally coated fiveminute epoxy After epoxy hard cut off nose correct down- sidethrust angles An adjustable protractortriangle great help Cut three small notches front end shown drawing Recoat front edge little epoxy Add small balsa bullet shape rear end unit finished 70 Model Aviation Above Close-up details elevator trim adjusting screw dethermalizer line rear sandwich assembly Right Details rudder adjusting screw rubberband tensions rud der left stabilizer rubberband hoiddowna right wing pylon plywood wing mounting saddle installed Note dethermalizer fuse rubberband heat shield snuffer tube Also note ply-reinforced rear motor peg simple effective motor-restraining system consists pin locked two notches fuselage pressure wound motor until propeller installed Full-Size Plans Available Page 188 - -jANID NC LEFT [DOING ___ F- REP SND SO irITNISSO _____________ I SWE RIP I~CC PEE ___________ 5p5ARE MW L NLR DEENKS SI-OSNA TIRACE SIZE N ROE ODWINE 555 SNE ONNSCRWROICSCRE P SIRE RENDER MOURNING FIN STANRODE rSNANs2D1 DCI NIRS IILI — IEEIRNNELSNPPLRI ANON DIEs- ONES BRIAN _ --- ---s-- PoSE DOSE TSP V EDO/ F SRRREWNRENSS CNN 5 ERON IRSIRE LICNONNO DION7CNDRCE S ED AREURM SINSSSCENTER ONES/SLEINOS sSNN ASS NE 5015550A-AfiDC NOR OSLEFON CO oEDS SIREI / /ES LIRE s-OILS C PR/CSON SNOBOC ROSENINA N OR -5SAN R CAREER MMCS WDT2TEC HAWK COANPE DFUSELAGE SITE V CA S$EDO555 SAC CNSS EDEN NNIS RELODCNN N RANDN N525NANN SNES DLDENLCENEBEE POWERED R RUPEES RESMCNRSERDBION MOREL TEN ION NBC C SON NO ES ACER OEVESES Wing Again fairly straightforward con struction techniques used Make tem plate 22 identical wing ribs trac ing Xerox copy made previously largest rib onto piece aluminum /32 plywood Use template cut out ribs Orient template slightly nose-down wood grain grain paral lel edges narrow rear end rib Stack 22 ribs short piece 46-sq stock upper spar groove sand out imperfections Use sanding block front back edges same length Build two center wing panels first Cover plans wax paper prevent sticking Tak glue small pieces A2 balsa forward edge trailing edge bot tom surface holds proper gle airfoil shape Pin length /6-sq stock plans forward trailing edge rib back ends rest strip tached glue Two ribs used locate leading edge since depending much sanding done ribs up ends its location may ex actly match shown plans Make dime-sized puddle CyA off side Dip leading trailing end rib puddle locate rib tween leading trailing edges Make sure rib straight installed center ribs tilted 70 Add top /16 spar gussets latter very important strengthening thin ribs Note gussets small 30 x 60W triangles grain parallel hypot enuse Remove pins front back edges lift wing panel wax paper Add lower /I6 spar A2 balsa sheeting leading edge easier size install panel free plan Repin panel plan outer end pinned down line tip panel center rib raised 3/2 surface Glue leading trailing edges spars A2 balsa sheeting directly center panel build out board tip panels vertical-grained spar webs joint should tight fit against transi tion rib Sand wing half correct leading trailing edge shape Its easier now both halves joined center panel pinned build ing board trial fit other panel center supporting shown plan Some sanding may necessary match rib surfaces satisfied glue panels together add /2-in-wide strip silk graphite reinforcing cloth over top joint Remove structure board add spar webs have some CyA few 6-in-long strands graphite glass fiber bottom side leading trailing edges top spar across center jointContinued page 185 March 1990 71 CASNES REP tSPRS{INU 5NNN REE /1 SZtONWs-.[DAD PS SOPS ~ZZZDDDONDs- AID ON 50CRDtVZAONClit NSEIlDSN 1111 1D5551is DUDOENS DDRPDN -IDDSSOANIONEs \DIO SDP ROTCDIN PECE-7IDC CRC RI j ODINNLN tttR ROSNNLNMCNS CS DOE Left The completely assembled propeller assembly showing l/6lfl dowel upper notch nose Right very important feature Free Flight ship No matter fail-safe dethermalizer might monster thermal can still carry QOS label identifies ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AMA Membership15 Ace Radio Control5 Aerospace Composite Prod55 Airtronics2 20 AI-Tec & Su-pr-line Products166 Altech MarketingCoy 2 170 American Jr Aircraft Co18 American Small Busn Computers1 Applied Engineering47 Authorized RC Service49 B&P Associates57 BLB168 Quay Barber Models182 Blue Ridge Mach & Tools153 Bolar Hell Research152 Bridi Aircraft140 Dave Brown Products31 Byron Originals87 Ca Ra Products55 Cambridge Model Aircraft8 Campbell Tools Co147 Cheveron168 Cleveland Model Supply16 Competition Products186 Corehouse161 Cove rite166 Cox Hobbies93 Crenshaw Aero57 Culpepper Models Inc184 Cygnet Software12 D&R Aircraft Mfg51 DGA Designs146 Daedalus Research Inc172 Davy Systems Corp153 Dodgson Designs38 Doylejet152 Du-Bro Products Inc96 Duracraft55 FAI Model Supply156 FHS Supply Inc22-23 Fiberglass Master4 Fiorenze Hobby Center146 First RC Flight School153 Flyline Models12 Fourmost Products49 Fults Dual Struts184 Futaba Corp America19 88 G&A Products152 GM Plastics Inc47 57 158 GM Precision Products37 Garuda Gliders147 Gator RC Products43 Carl Goldberg Models13 106 Golden Gate Hobbies174 Phillip Good145 Gorham Model Products173 Great Planes21 Hi Line Ltd176 High Sky180 Hobby Barn142-143 Hobby Dynamics 10 12 18 85 94-95 105 Hobby Horn20 Hobby Lobby International162-165 Hobby Supply South180 Hobby Woods8 Bob Holman Plans156 Ikon Northwest Co141 Indy RC Sales Ac148-150 JCM Company145 JR Radios10 94-95105 JTec182 JammAero144 Jan Crystals20 Larry Jolly Model Products158 Jomar8 K&B Mfg152 K&S Engineering151 K-Flight Industries156 Kingsway Enterprises146 Kraft Midwest51 Kustom Kraftsmanship176 LA Model Hobby Show159 Lanier RC51 Lone Star Models147 MACS Products140 MGA Enterprises144 Memphis Model Market160 Micro Mark6-7 Midwest Products101 Model Rectifier CorpCoy 3 Sid Morgan Plans186 Walt Moucha Models175 Mutchlers Hobbies154-155 NF Video Library31 Northeast Aerodynamics4 Northern Modeling Products38 Northwest Hobby Supply9 Ohio Superstar53 Pacer Tech167 Paper Airplanes Intl173 Parrish Aircraft151 Pattern Tek53 Penn Valley Hobby Center157 Performance Products Ultd174 Performance Specialties174 Pica Products16 Pin-Nik Sales172 Plane Video18 Pro-Tune Corp140 Progress Mfg Co144 RAM182 RC Buyers Guide183 RC Designs176 RC Extras186 RC International17 RC Video Review157 RJL Industries161 Radial Engine Technologies43 Ragan/Barker Group156 Red Max Fuel22-23 Reichmuth Electronics152 Robart11 Rons Model Building144 Rossi USA103 RounTuit57 SAC44 SR Batteries145 Sachs TG186 Safety Plus16 47 Satellite City187 Scale Model Research146 Scale Plans & Photo Ser144 Sermos RC Snap Connectors184 Shamrock Competition Imports171 Sheldons Hobby Shop146 Sig Mfg Co4 83 181 Simple Simon Airplane Co182 Square Cut Tools174 Smith Enterprises181 Stangel Enterprises180 Sun Craft157 Superior Aircraft37 Swanson Assoc176 T&D Fiberglass Spec172 TEAM160 Tatone Products Co55 Tidewater Hobby Enterprises168 Toledo RC Exposition156 Top Flite Models Inc169 Tower Hobbies177-179 Tru-Turn152 US Quadra166 Ultimatesport RC160 VL Products161 Vinylwrite Custom Lettering172 WE Technical Services184 Webra18 Williams Brothers49 Windsor Propeller Co53 Wing Mfg158 World EnginesCover 4 Yashioka12 85 Nick Ziroli Models44 ers use 40-size engines stock mufflers draw common fuel source Rac ing heats four theyre scored two ways finish position after 10 laps first through fourth best lap time Again large number umps officials needed conduct race Fifteen-year-old Jerret Cangie Redmont WA red-hot devotee Unfortu nately Jerret mechanic/flier Bill Petterson Seattle flooded engine failed start up within required 90second window following signal young men told practice lo cal contests about two weeks Diametrically opposite adrenalin scale seems docile Free Flight Scale models both indoor outdoor types aircraft very care fully judged realism fidelity workmanship indicates patience supreme As always Free Flight Scale vari ety great Rubber gas power mod ern antique aircraftwhat treat view such exceptionally fine building skills also envy small boxes needed transport lovely creations Nats like banqueta huge crowd SAFE FLYING IS NO ACCIDENT responding advertisers mention read about ModelAviation diners well regiment servers cooks dishwashers staff gets neither wages nor tips Vince Mankowski quartermaster general headwaiter chief cook bottle washer etc etcarranged little compensation form din ner loyal army DJ old-time music us old folks tripping light fantastic heartwarming touch Vince whatever happened dessert Winter Hawk/ODwyer Continued page 71 Prepare wing covering painting tissue attaches two coats sand ing sealer sanding lightly between coats March 1990 185 OUT OF THE ASHES .. INTO THE IWNNERS CIRCLE PHOENIX T FOR ADOmONAI INFORMATION SEND LSASE greatly improves Japanese tissue adherence Cover bottom surface first good grade Japanese tissue type supplied Peck-Polymers works very well experi ence Attach tissue thick dope rib bottom spar assure accurate lower contour Nitrate thinner brush used slightly release adhering dope pull out wrinkles After wing fin stabilizer com pletely covered spray water shrink taut brush two coats nitrate dope Thin nitrate one-to-one plasticize few drops TCP castor oil before applying Allow dope cure several days check warps No washin washout used gurney flap left tip panel seems eliminate need special warps Steam flat twists present makes wing much easier check prior flying ses sion Propeller Though propeller assembly may appear complicated first really isnt unique prop stop mechanism combines best features several other systems de serves much credit Winter Hawks winning ways convince try Ill list some features mechanism torque actuated tension sensitive rubber motor torque drops about in/oz lever engages tack head stop rotation motor can several inches shorter distance between rear peg prop shaft hook eliminates unpredict able center-of-gravity shifts due rubber bunching end proprun short mo tor also prevents prop assembly falling out would cause disqualification parts SPAN 132 AREA 1047 SQ IN WEIGHT 72- 76 OZ AtAFOIL 54061 WiNGLOAD 10 OZ/SQ FT ASPECT RATIO 1671 COMPETITION PRODUCTS 921 BIRDIE WAY APOLLO BEACH FL 33672 813 648 6171 Sachs Dolmar Engines Customized TG Only 100% SACHS Engine 27 S $38000 31 $38000 34 *40000 37 *43000 42 $45000 add $50 throttle-coupled spark advance New TorqL Mow Engines Complel Nothing Bu See WRAM TOLEDO Shows TG MFG201 427-384 857 High Mtn Rd N Haledon NJ 0750 droppedand probable propeller loss FAL Model Supply Form contour airfoil Torque actuation actually saves altitude con- slight undercamber Its important remember trast tension-type propeller causes the edge greater curve leading nose drop prop slowly finishes last edge few turns torque-actuated prop folds shaped draw pencil line apex still pulling inner curve center tip lever can engaged onto tack head line should about /2 trailing edge prior attaching propeller wound motor its widest point forward surface Locate will prevent prop turning the blade wire line Y10 fold piv flier checks alignment looks indications ot shown drawing Draw around thermals lights fuse youre ready wire blade groove Out accept launch simply rotate hub backwards wire flush surface Use five-minute ep small amount until hear click pro- oxy / plywood doubler secure wire peller free turn use several clothespins clamp plywood un use system rubber-powered til epoxy sets Wakefields Mulvihills folding propel- blades held onto hub small lers has shown 100% reliability brass washers soldered end model make hub Winter Hawk first oh- can tolerate added weight /6-ID inside ditam aluminum Coupe hub FAI Model ameter wheel collars can used shown Supply Either leave huh full length 1% in- photo collars allow rapid blade replaceas shown photo cut off shown ment drawing reduce weight drag Remem- will note greatest blade area forher huh components drawing ward wire places center-of-pres shown twice actual size clarity sure forward elastic axis causing pitch half-size reduction area drawing increase under load gradually reduce local copy machine might help prevent torque decreases Slow-motion videotapes have big mistake confirmed effect also show need parts drawn accurate scale pre- turbulator strips prevent flutter HO modelvent confusion however dimen- railroad-scale 2 x 4-ft pieces basswood seem stoned Drill holes hand drill cut work great turhulator blades out X-Acto jewelers saw file Set blade pitch angle shown drawto shape 10 propeller assemblies ing Adjust angle twisting wire Track using mechanism probably no two ex- tips both tips same plane bend actly alike yet seem work well ing point blade wire acts stop other words stop mechanism does re- against aluminum hub apply dab red quire precision machining Montreal paint tip blade aid tracking type A spinner will protect hub mechanism propeller blades Blue Ridge Models reduce drag Being unable find suitable 1-intwisted very accurately obtain through dia plastic spinner made basswood R/C EXTRAS Introduces Clipped-Wing Taylorcratt 1/4 standoff scale hIgh aerobalic plane has 90 wingspan wes 90 -152 stroke 12- 164 stroke engine Detailed Plans Epoxy-Glass Cowl Hand-Cut Parts Excellent Hardware Pkg Price $20995 4*10 shippIng R/C EXTRAS 1404 Vandenberg Circle W Sergeant Bluff IA 51054 712-943-4102 186 Model Aviation VINTAUE It-C PLAN3 GONSOLIDAT PBY-5A CATALINA 9FT WING SPAN AtL RIBS B FULL FORMERI SHOWN ON PLANS11 PLAsTIC ENGCOWLS $1090 PR CLEAR GUN BLISTERS $ 760 PR 4 LARGE PLAN SHEETS s $1895 6FT WING SPAN MODEL PBY-5A ENGINE COWLS $750 PR Plans $1495 GUN BLISTERS $5SO PR ADD $300 POSTAGE cATALOGOVER 50 PLANS $100 DEALERS WRITE W 43WE SID MORGAN 13157 ORMOND BELLEVILLEMICH 48111 USA Mmjacltusof tie Exira 230 md Weeks Speelci plone Cash Money Orders Z
Edition: Model Aviation - 1990/03
Page Numbers: 68, 69, 70, 71, 185, 186
68 Model Aviation winter events thermals nonexis tent early models nearly 300 sq wing huge propellers making like Indoor models Wakefields class given FAI recog nition designation Flu COUPE DHIVER pronounced dee vair means Winter Cup class model originated France 1944 sim pler alternative Wakefield fact style has often referred /2 Wake Originally designed flown Top The completed Winter Hawk its propel ler blades folded flight mode rest tween flights model has simple struc ture allows fast building repairs clean low-drag shape Above au thor demonstrating motor winding setup good stooge winder torque meter big help reducing contest hassles Winter Hawks wing uses turbulatea okoIov airtoll wing area 164 sq pect ratio 131 small gurney flap used left tip panel maintain flat left glide Winter Hawk t A41 -U f winter hawk primarily white bird na tive Scandinavian countries also found other parts northern Europe As Coupe dHiver grew popularity inevitably came flown summer well summer winds thermals caused problems designs light wing loadings slow climbing characteristics Being difficult DT de thermalize thermals models often lost Sometimes moderate winds dashed ground before could gain enough altitude Consequently evolution has away light wing loadings slow climb much Wakefield-like performance appear ance todays breed small fastclimbing Coupe capable winning com petitions hot summer days moderate winds wont win under conditions added prowess compromise must made using latest technology reli able model also wanted plane could come out top calm days no thermals present Bob White has such model Beau Coupe shied away complicated wing structure curved tips Also carving efficient propeller seemed difficult task found simpler approach harness ing lot new ideas available compo nents came up just model wantedquick-building clean-lined competitive Winter Hawk im mediate success awarded Ft Worth Planesmens Best New Design 1983 has won placed contests since model has accumulated some 20 trophies won Open Coupe 1987 Nats Lincoln NE Basic specifications Winter Hawk follows wing uses tur bulated Sokolov airfoil has area 164 sq aspect ratio 131 small gurney flap used left tip panel maintain flat left glide helps keep thermals propeller uses very effi cient precarved blades available Blue Ridge Models also uses torque-sen sitive prop stop eliminates rubber bunching improves transition climb glide Overall its clean lowdrag shape still meets 31-sq-in cross section requirement model has simple design features allow fast build ing repairs Fuselage Make body single piece /16 sheet balsa light grained 3 x 36 sheet first tapered slightly aft 24 width 1% /6 x 24-in triangle removed side Seal inside two coats thick nitrate dope allowing about two hours beNamed after hawk native Scandinavian countries contest-winning Coupe dHiver evolved some novel ideas ingenius use available materials EJohn R ODwyer tween coats After second coat dry immerse sheet hot water bath tub about 10 minutes balsa starts curling tube wet tube slid onto round mandrel approximately 10 diameter found old pool cue almost perfect Wrap tube Ace bandage other cloth thats similarly stretchy porous Allow day thorough drying body tube drying build wing mount pylon Use three 2/2 x 3-in pieces lightweight even-grained /16 balsa sheet Edge glue together using CyA cyanoacrylate glue 9-in strip grain running vertical Apply coat dope exact center inside will help forming around two ribs shape pylon can transfer con tour ribs plan first Xe roxing paper ironing shape onto balsa sheet Transfer wing stabilizer contours same way two pylon ribs assem March 1990 69 Left The propeller hubs #8 left #9 right number eight hub uses wheel collars secure propeller blades #9 lighter has less drag spinner carved basswood Right Close-up view hub #9 showing simple spinner adapter hubs include best features several different designs Complete construction operating details contained text plans bled two bulkheads form short winglike structure Center long 9-in strip nose about % strip below rib side will attached fuselage Make ply wood wing mount snuffer tube dont mount point Remove th body tube mandrel dry Starting front working toward rear carefully join seam CyA Sand smooth apply coat sanding sealer Sand again lightly wrap tube layer Japanese tissue Use thinned dope adhere tissue smoothing out wrinkles Though will have removed later attachment points various compo nentseg pylon rear rubber support band tail partsits easier apply tissue now rather later building sequence tissue easily removed lightly cutting shape excised brushing thinner area Cut bottom pylon roughly shape finish rubbing fore aft piece 180-grit sandpaper wrapped around body tube Sand seal py lon cover Japanese tissue tach pylon body tube loca tion shown plans tube seam bottom Fin rudder stabilizer DT system Construction fairly straightforward aft spar fin should long enough protrude slightly through bottom strengthen attachment fin should line up vertically pylon flat side fin airfoil parallel body tube centerline Dont attempt stall DT dethermalizer line until glue inside tube fin spar thor oughly dry little sandwich assembly rear could incorporate aluminum tube Teflon has less friction weighs less glue holding forward DT guide dry 12-lb monofilament line fed forward tube until comes out open rear end body tube Slide line tube sandwich assembly Fit latter notch cut upper side body tube carefully glue place short piece A6 aluminum tube used secure end loops DT line squeezing pliers after correct length set stab assembly will have com pleted prior installation Although 600 tilt stabilizer dethermalized position rather extreme its necessary ensure model will fall out ther mal use small nylon screws tail trim adjustments may seem little com plicated theyre much precise re liable shims trim tabs Youll ap preciate extra effort required 2-56 nylon screws FAI Model Supply slightly oversized hold settings very well something isnt true metal screws heavyweight aluminum foil heat sink should tight fit snuffer tube conduct heat away efficiently foil glued pylon tube ce mented place small S-hook formed end open closed end forward loop DT line will help easily re placing small rubberband before flight nose body tube reinforced one-inch-wide band silk nylon graphite cloth liberally coated fiveminute epoxy After epoxy hard cut off nose correct down- sidethrust angles An adjustable protractortriangle great help Cut three small notches front end shown drawing Recoat front edge little epoxy Add small balsa bullet shape rear end unit finished 70 Model Aviation Above Close-up details elevator trim adjusting screw dethermalizer line rear sandwich assembly Right Details rudder adjusting screw rubberband tensions rud der left stabilizer rubberband hoiddowna right wing pylon plywood wing mounting saddle installed Note dethermalizer fuse rubberband heat shield snuffer tube Also note ply-reinforced rear motor peg simple effective motor-restraining system consists pin locked two notches fuselage pressure wound motor until propeller installed Full-Size Plans Available Page 188 - -jANID NC LEFT [DOING ___ F- REP SND SO irITNISSO _____________ I SWE RIP I~CC PEE ___________ 5p5ARE MW L NLR DEENKS SI-OSNA TIRACE SIZE N ROE ODWINE 555 SNE ONNSCRWROICSCRE P SIRE RENDER MOURNING FIN STANRODE rSNANs2D1 DCI NIRS IILI — IEEIRNNELSNPPLRI ANON DIEs- ONES BRIAN _ --- ---s-- PoSE DOSE TSP V EDO/ F SRRREWNRENSS CNN 5 ERON IRSIRE LICNONNO DION7CNDRCE S ED AREURM SINSSSCENTER ONES/SLEINOS sSNN ASS NE 5015550A-AfiDC NOR OSLEFON CO oEDS SIREI / /ES LIRE s-OILS C PR/CSON SNOBOC ROSENINA N OR -5SAN R CAREER MMCS WDT2TEC HAWK COANPE DFUSELAGE SITE V CA S$EDO555 SAC CNSS EDEN NNIS RELODCNN N RANDN N525NANN SNES DLDENLCENEBEE POWERED R RUPEES RESMCNRSERDBION MOREL TEN ION NBC C SON NO ES ACER OEVESES Wing Again fairly straightforward con struction techniques used Make tem plate 22 identical wing ribs trac ing Xerox copy made previously largest rib onto piece aluminum /32 plywood Use template cut out ribs Orient template slightly nose-down wood grain grain paral lel edges narrow rear end rib Stack 22 ribs short piece 46-sq stock upper spar groove sand out imperfections Use sanding block front back edges same length Build two center wing panels first Cover plans wax paper prevent sticking Tak glue small pieces A2 balsa forward edge trailing edge bot tom surface holds proper gle airfoil shape Pin length /6-sq stock plans forward trailing edge rib back ends rest strip tached glue Two ribs used locate leading edge since depending much sanding done ribs up ends its location may ex actly match shown plans Make dime-sized puddle CyA off side Dip leading trailing end rib puddle locate rib tween leading trailing edges Make sure rib straight installed center ribs tilted 70 Add top /16 spar gussets latter very important strengthening thin ribs Note gussets small 30 x 60W triangles grain parallel hypot enuse Remove pins front back edges lift wing panel wax paper Add lower /I6 spar A2 balsa sheeting leading edge easier size install panel free plan Repin panel plan outer end pinned down line tip panel center rib raised 3/2 surface Glue leading trailing edges spars A2 balsa sheeting directly center panel build out board tip panels vertical-grained spar webs joint should tight fit against transi tion rib Sand wing half correct leading trailing edge shape Its easier now both halves joined center panel pinned build ing board trial fit other panel center supporting shown plan Some sanding may necessary match rib surfaces satisfied glue panels together add /2-in-wide strip silk graphite reinforcing cloth over top joint Remove structure board add spar webs have some CyA few 6-in-long strands graphite glass fiber bottom side leading trailing edges top spar across center jointContinued page 185 March 1990 71 CASNES REP tSPRS{INU 5NNN REE /1 SZtONWs-.[DAD PS SOPS ~ZZZDDDONDs- AID ON 50CRDtVZAONClit NSEIlDSN 1111 1D5551is DUDOENS DDRPDN -IDDSSOANIONEs \DIO SDP ROTCDIN PECE-7IDC CRC RI j ODINNLN tttR ROSNNLNMCNS CS DOE Left The completely assembled propeller assembly showing l/6lfl dowel upper notch nose Right very important feature Free Flight ship No matter fail-safe dethermalizer might monster thermal can still carry QOS label identifies ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AMA Membership15 Ace Radio Control5 Aerospace Composite Prod55 Airtronics2 20 AI-Tec & Su-pr-line Products166 Altech MarketingCoy 2 170 American Jr Aircraft Co18 American Small Busn Computers1 Applied Engineering47 Authorized RC Service49 B&P Associates57 BLB168 Quay Barber Models182 Blue Ridge Mach & Tools153 Bolar Hell Research152 Bridi Aircraft140 Dave Brown Products31 Byron Originals87 Ca Ra Products55 Cambridge Model Aircraft8 Campbell Tools Co147 Cheveron168 Cleveland Model Supply16 Competition Products186 Corehouse161 Cove rite166 Cox Hobbies93 Crenshaw Aero57 Culpepper Models Inc184 Cygnet Software12 D&R Aircraft Mfg51 DGA Designs146 Daedalus Research Inc172 Davy Systems Corp153 Dodgson Designs38 Doylejet152 Du-Bro Products Inc96 Duracraft55 FAI Model Supply156 FHS Supply Inc22-23 Fiberglass Master4 Fiorenze Hobby Center146 First RC Flight School153 Flyline Models12 Fourmost Products49 Fults Dual Struts184 Futaba Corp America19 88 G&A Products152 GM Plastics Inc47 57 158 GM Precision Products37 Garuda Gliders147 Gator RC Products43 Carl Goldberg Models13 106 Golden Gate Hobbies174 Phillip Good145 Gorham Model Products173 Great Planes21 Hi Line Ltd176 High Sky180 Hobby Barn142-143 Hobby Dynamics 10 12 18 85 94-95 105 Hobby Horn20 Hobby Lobby International162-165 Hobby Supply South180 Hobby Woods8 Bob Holman Plans156 Ikon Northwest Co141 Indy RC Sales Ac148-150 JCM Company145 JR Radios10 94-95105 JTec182 JammAero144 Jan Crystals20 Larry Jolly Model Products158 Jomar8 K&B Mfg152 K&S Engineering151 K-Flight Industries156 Kingsway Enterprises146 Kraft Midwest51 Kustom Kraftsmanship176 LA Model Hobby Show159 Lanier RC51 Lone Star Models147 MACS Products140 MGA Enterprises144 Memphis Model Market160 Micro Mark6-7 Midwest Products101 Model Rectifier CorpCoy 3 Sid Morgan Plans186 Walt Moucha Models175 Mutchlers Hobbies154-155 NF Video Library31 Northeast Aerodynamics4 Northern Modeling Products38 Northwest Hobby Supply9 Ohio Superstar53 Pacer Tech167 Paper Airplanes Intl173 Parrish Aircraft151 Pattern Tek53 Penn Valley Hobby Center157 Performance Products Ultd174 Performance Specialties174 Pica Products16 Pin-Nik Sales172 Plane Video18 Pro-Tune Corp140 Progress Mfg Co144 RAM182 RC Buyers Guide183 RC Designs176 RC Extras186 RC International17 RC Video Review157 RJL Industries161 Radial Engine Technologies43 Ragan/Barker Group156 Red Max Fuel22-23 Reichmuth Electronics152 Robart11 Rons Model Building144 Rossi USA103 RounTuit57 SAC44 SR Batteries145 Sachs TG186 Safety Plus16 47 Satellite City187 Scale Model Research146 Scale Plans & Photo Ser144 Sermos RC Snap Connectors184 Shamrock Competition Imports171 Sheldons Hobby Shop146 Sig Mfg Co4 83 181 Simple Simon Airplane Co182 Square Cut Tools174 Smith Enterprises181 Stangel Enterprises180 Sun Craft157 Superior Aircraft37 Swanson Assoc176 T&D Fiberglass Spec172 TEAM160 Tatone Products Co55 Tidewater Hobby Enterprises168 Toledo RC Exposition156 Top Flite Models Inc169 Tower Hobbies177-179 Tru-Turn152 US Quadra166 Ultimatesport RC160 VL Products161 Vinylwrite Custom Lettering172 WE Technical Services184 Webra18 Williams Brothers49 Windsor Propeller Co53 Wing Mfg158 World EnginesCover 4 Yashioka12 85 Nick Ziroli Models44 ers use 40-size engines stock mufflers draw common fuel source Rac ing heats four theyre scored two ways finish position after 10 laps first through fourth best lap time Again large number umps officials needed conduct race Fifteen-year-old Jerret Cangie Redmont WA red-hot devotee Unfortu nately Jerret mechanic/flier Bill Petterson Seattle flooded engine failed start up within required 90second window following signal young men told practice lo cal contests about two weeks Diametrically opposite adrenalin scale seems docile Free Flight Scale models both indoor outdoor types aircraft very care fully judged realism fidelity workmanship indicates patience supreme As always Free Flight Scale vari ety great Rubber gas power mod ern antique aircraftwhat treat view such exceptionally fine building skills also envy small boxes needed transport lovely creations Nats like banqueta huge crowd SAFE FLYING IS NO ACCIDENT responding advertisers mention read about ModelAviation diners well regiment servers cooks dishwashers staff gets neither wages nor tips Vince Mankowski quartermaster general headwaiter chief cook bottle washer etc etcarranged little compensation form din ner loyal army DJ old-time music us old folks tripping light fantastic heartwarming touch Vince whatever happened dessert Winter Hawk/ODwyer Continued page 71 Prepare wing covering painting tissue attaches two coats sand ing sealer sanding lightly between coats March 1990 185 OUT OF THE ASHES .. INTO THE IWNNERS CIRCLE PHOENIX T FOR ADOmONAI INFORMATION SEND LSASE greatly improves Japanese tissue adherence Cover bottom surface first good grade Japanese tissue type supplied Peck-Polymers works very well experi ence Attach tissue thick dope rib bottom spar assure accurate lower contour Nitrate thinner brush used slightly release adhering dope pull out wrinkles After wing fin stabilizer com pletely covered spray water shrink taut brush two coats nitrate dope Thin nitrate one-to-one plasticize few drops TCP castor oil before applying Allow dope cure several days check warps No washin washout used gurney flap left tip panel seems eliminate need special warps Steam flat twists present makes wing much easier check prior flying ses sion Propeller Though propeller assembly may appear complicated first really isnt unique prop stop mechanism combines best features several other systems de serves much credit Winter Hawks winning ways convince try Ill list some features mechanism torque actuated tension sensitive rubber motor torque drops about in/oz lever engages tack head stop rotation motor can several inches shorter distance between rear peg prop shaft hook eliminates unpredict able center-of-gravity shifts due rubber bunching end proprun short mo tor also prevents prop assembly falling out would cause disqualification parts SPAN 132 AREA 1047 SQ IN WEIGHT 72- 76 OZ AtAFOIL 54061 WiNGLOAD 10 OZ/SQ FT ASPECT RATIO 1671 COMPETITION PRODUCTS 921 BIRDIE WAY APOLLO BEACH FL 33672 813 648 6171 Sachs Dolmar Engines Customized TG Only 100% SACHS Engine 27 S $38000 31 $38000 34 *40000 37 *43000 42 $45000 add $50 throttle-coupled spark advance New TorqL Mow Engines Complel Nothing Bu See WRAM TOLEDO Shows TG MFG201 427-384 857 High Mtn Rd N Haledon NJ 0750 droppedand probable propeller loss FAL Model Supply Form contour airfoil Torque actuation actually saves altitude con- slight undercamber Its important remember trast tension-type propeller causes the edge greater curve leading nose drop prop slowly finishes last edge few turns torque-actuated prop folds shaped draw pencil line apex still pulling inner curve center tip lever can engaged onto tack head line should about /2 trailing edge prior attaching propeller wound motor its widest point forward surface Locate will prevent prop turning the blade wire line Y10 fold piv flier checks alignment looks indications ot shown drawing Draw around thermals lights fuse youre ready wire blade groove Out accept launch simply rotate hub backwards wire flush surface Use five-minute ep small amount until hear click pro- oxy / plywood doubler secure wire peller free turn use several clothespins clamp plywood un use system rubber-powered til epoxy sets Wakefields Mulvihills folding propel- blades held onto hub small lers has shown 100% reliability brass washers soldered end model make hub Winter Hawk first oh- can tolerate added weight /6-ID inside ditam aluminum Coupe hub FAI Model ameter wheel collars can used shown Supply Either leave huh full length 1% in- photo collars allow rapid blade replaceas shown photo cut off shown ment drawing reduce weight drag Remem- will note greatest blade area forher huh components drawing ward wire places center-of-pres shown twice actual size clarity sure forward elastic axis causing pitch half-size reduction area drawing increase under load gradually reduce local copy machine might help prevent torque decreases Slow-motion videotapes have big mistake confirmed effect also show need parts drawn accurate scale pre- turbulator strips prevent flutter HO modelvent confusion however dimen- railroad-scale 2 x 4-ft pieces basswood seem stoned Drill holes hand drill cut work great turhulator blades out X-Acto jewelers saw file Set blade pitch angle shown drawto shape 10 propeller assemblies ing Adjust angle twisting wire Track using mechanism probably no two ex- tips both tips same plane bend actly alike yet seem work well ing point blade wire acts stop other words stop mechanism does re- against aluminum hub apply dab red quire precision machining Montreal paint tip blade aid tracking type A spinner will protect hub mechanism propeller blades Blue Ridge Models reduce drag Being unable find suitable 1-intwisted very accurately obtain through dia plastic spinner made basswood R/C EXTRAS Introduces Clipped-Wing Taylorcratt 1/4 standoff scale hIgh aerobalic plane has 90 wingspan wes 90 -152 stroke 12- 164 stroke engine Detailed Plans Epoxy-Glass Cowl Hand-Cut Parts Excellent Hardware Pkg Price $20995 4*10 shippIng R/C EXTRAS 1404 Vandenberg Circle W Sergeant Bluff IA 51054 712-943-4102 186 Model Aviation VINTAUE It-C PLAN3 GONSOLIDAT PBY-5A CATALINA 9FT WING SPAN AtL RIBS B FULL FORMERI SHOWN ON PLANS11 PLAsTIC ENGCOWLS $1090 PR CLEAR GUN BLISTERS $ 760 PR 4 LARGE PLAN SHEETS s $1895 6FT WING SPAN MODEL PBY-5A ENGINE COWLS $750 PR Plans $1495 GUN BLISTERS $5SO PR ADD $300 POSTAGE cATALOGOVER 50 PLANS $100 DEALERS WRITE W 43WE SID MORGAN 13157 ORMOND BELLEVILLEMICH 48111 USA Mmjacltusof tie Exira 230 md Weeks Speelci plone Cash Money Orders Z
Edition: Model Aviation - 1990/03
Page Numbers: 68, 69, 70, 71, 185, 186
68 Model Aviation winter events thermals nonexis tent early models nearly 300 sq wing huge propellers making like Indoor models Wakefields class given FAI recog nition designation Flu COUPE DHIVER pronounced dee vair means Winter Cup class model originated France 1944 sim pler alternative Wakefield fact style has often referred /2 Wake Originally designed flown Top The completed Winter Hawk its propel ler blades folded flight mode rest tween flights model has simple struc ture allows fast building repairs clean low-drag shape Above au thor demonstrating motor winding setup good stooge winder torque meter big help reducing contest hassles Winter Hawks wing uses turbulatea okoIov airtoll wing area 164 sq pect ratio 131 small gurney flap used left tip panel maintain flat left glide Winter Hawk t A41 -U f winter hawk primarily white bird na tive Scandinavian countries also found other parts northern Europe As Coupe dHiver grew popularity inevitably came flown summer well summer winds thermals caused problems designs light wing loadings slow climbing characteristics Being difficult DT de thermalize thermals models often lost Sometimes moderate winds dashed ground before could gain enough altitude Consequently evolution has away light wing loadings slow climb much Wakefield-like performance appear ance todays breed small fastclimbing Coupe capable winning com petitions hot summer days moderate winds wont win under conditions added prowess compromise must made using latest technology reli able model also wanted plane could come out top calm days no thermals present Bob White has such model Beau Coupe shied away complicated wing structure curved tips Also carving efficient propeller seemed difficult task found simpler approach harness ing lot new ideas available compo nents came up just model wantedquick-building clean-lined competitive Winter Hawk im mediate success awarded Ft Worth Planesmens Best New Design 1983 has won placed contests since model has accumulated some 20 trophies won Open Coupe 1987 Nats Lincoln NE Basic specifications Winter Hawk follows wing uses tur bulated Sokolov airfoil has area 164 sq aspect ratio 131 small gurney flap used left tip panel maintain flat left glide helps keep thermals propeller uses very effi cient precarved blades available Blue Ridge Models also uses torque-sen sitive prop stop eliminates rubber bunching improves transition climb glide Overall its clean lowdrag shape still meets 31-sq-in cross section requirement model has simple design features allow fast build ing repairs Fuselage Make body single piece /16 sheet balsa light grained 3 x 36 sheet first tapered slightly aft 24 width 1% /6 x 24-in triangle removed side Seal inside two coats thick nitrate dope allowing about two hours beNamed after hawk native Scandinavian countries contest-winning Coupe dHiver evolved some novel ideas ingenius use available materials EJohn R ODwyer tween coats After second coat dry immerse sheet hot water bath tub about 10 minutes balsa starts curling tube wet tube slid onto round mandrel approximately 10 diameter found old pool cue almost perfect Wrap tube Ace bandage other cloth thats similarly stretchy porous Allow day thorough drying body tube drying build wing mount pylon Use three 2/2 x 3-in pieces lightweight even-grained /16 balsa sheet Edge glue together using CyA cyanoacrylate glue 9-in strip grain running vertical Apply coat dope exact center inside will help forming around two ribs shape pylon can transfer con tour ribs plan first Xe roxing paper ironing shape onto balsa sheet Transfer wing stabilizer contours same way two pylon ribs assem March 1990 69 Left The propeller hubs #8 left #9 right number eight hub uses wheel collars secure propeller blades #9 lighter has less drag spinner carved basswood Right Close-up view hub #9 showing simple spinner adapter hubs include best features several different designs Complete construction operating details contained text plans bled two bulkheads form short winglike structure Center long 9-in strip nose about % strip below rib side will attached fuselage Make ply wood wing mount snuffer tube dont mount point Remove th body tube mandrel dry Starting front working toward rear carefully join seam CyA Sand smooth apply coat sanding sealer Sand again lightly wrap tube layer Japanese tissue Use thinned dope adhere tissue smoothing out wrinkles Though will have removed later attachment points various compo nentseg pylon rear rubber support band tail partsits easier apply tissue now rather later building sequence tissue easily removed lightly cutting shape excised brushing thinner area Cut bottom pylon roughly shape finish rubbing fore aft piece 180-grit sandpaper wrapped around body tube Sand seal py lon cover Japanese tissue tach pylon body tube loca tion shown plans tube seam bottom Fin rudder stabilizer DT system Construction fairly straightforward aft spar fin should long enough protrude slightly through bottom strengthen attachment fin should line up vertically pylon flat side fin airfoil parallel body tube centerline Dont attempt stall DT dethermalizer line until glue inside tube fin spar thor oughly dry little sandwich assembly rear could incorporate aluminum tube Teflon has less friction weighs less glue holding forward DT guide dry 12-lb monofilament line fed forward tube until comes out open rear end body tube Slide line tube sandwich assembly Fit latter notch cut upper side body tube carefully glue place short piece A6 aluminum tube used secure end loops DT line squeezing pliers after correct length set stab assembly will have com pleted prior installation Although 600 tilt stabilizer dethermalized position rather extreme its necessary ensure model will fall out ther mal use small nylon screws tail trim adjustments may seem little com plicated theyre much precise re liable shims trim tabs Youll ap preciate extra effort required 2-56 nylon screws FAI Model Supply slightly oversized hold settings very well something isnt true metal screws heavyweight aluminum foil heat sink should tight fit snuffer tube conduct heat away efficiently foil glued pylon tube ce mented place small S-hook formed end open closed end forward loop DT line will help easily re placing small rubberband before flight nose body tube reinforced one-inch-wide band silk nylon graphite cloth liberally coated fiveminute epoxy After epoxy hard cut off nose correct down- sidethrust angles An adjustable protractortriangle great help Cut three small notches front end shown drawing Recoat front edge little epoxy Add small balsa bullet shape rear end unit finished 70 Model Aviation Above Close-up details elevator trim adjusting screw dethermalizer line rear sandwich assembly Right Details rudder adjusting screw rubberband tensions rud der left stabilizer rubberband hoiddowna right wing pylon plywood wing mounting saddle installed Note dethermalizer fuse rubberband heat shield snuffer tube Also note ply-reinforced rear motor peg simple effective motor-restraining system consists pin locked two notches fuselage pressure wound motor until propeller installed Full-Size Plans Available Page 188 - -jANID NC LEFT [DOING ___ F- REP SND SO irITNISSO _____________ I SWE RIP I~CC PEE ___________ 5p5ARE MW L NLR DEENKS SI-OSNA TIRACE SIZE N ROE ODWINE 555 SNE ONNSCRWROICSCRE P SIRE RENDER MOURNING FIN STANRODE rSNANs2D1 DCI NIRS IILI — IEEIRNNELSNPPLRI ANON DIEs- ONES BRIAN _ --- ---s-- PoSE DOSE TSP V EDO/ F SRRREWNRENSS CNN 5 ERON IRSIRE LICNONNO DION7CNDRCE S ED AREURM SINSSSCENTER ONES/SLEINOS sSNN ASS NE 5015550A-AfiDC NOR OSLEFON CO oEDS SIREI / /ES LIRE s-OILS C PR/CSON SNOBOC ROSENINA N OR -5SAN R CAREER MMCS WDT2TEC HAWK COANPE DFUSELAGE SITE V CA S$EDO555 SAC CNSS EDEN NNIS RELODCNN N RANDN N525NANN SNES DLDENLCENEBEE POWERED R RUPEES RESMCNRSERDBION MOREL TEN ION NBC C SON NO ES ACER OEVESES Wing Again fairly straightforward con struction techniques used Make tem plate 22 identical wing ribs trac ing Xerox copy made previously largest rib onto piece aluminum /32 plywood Use template cut out ribs Orient template slightly nose-down wood grain grain paral lel edges narrow rear end rib Stack 22 ribs short piece 46-sq stock upper spar groove sand out imperfections Use sanding block front back edges same length Build two center wing panels first Cover plans wax paper prevent sticking Tak glue small pieces A2 balsa forward edge trailing edge bot tom surface holds proper gle airfoil shape Pin length /6-sq stock plans forward trailing edge rib back ends rest strip tached glue Two ribs used locate leading edge since depending much sanding done ribs up ends its location may ex actly match shown plans Make dime-sized puddle CyA off side Dip leading trailing end rib puddle locate rib tween leading trailing edges Make sure rib straight installed center ribs tilted 70 Add top /16 spar gussets latter very important strengthening thin ribs Note gussets small 30 x 60W triangles grain parallel hypot enuse Remove pins front back edges lift wing panel wax paper Add lower /I6 spar A2 balsa sheeting leading edge easier size install panel free plan Repin panel plan outer end pinned down line tip panel center rib raised 3/2 surface Glue leading trailing edges spars A2 balsa sheeting directly center panel build out board tip panels vertical-grained spar webs joint should tight fit against transi tion rib Sand wing half correct leading trailing edge shape Its easier now both halves joined center panel pinned build ing board trial fit other panel center supporting shown plan Some sanding may necessary match rib surfaces satisfied glue panels together add /2-in-wide strip silk graphite reinforcing cloth over top joint Remove structure board add spar webs have some CyA few 6-in-long strands graphite glass fiber bottom side leading trailing edges top spar across center jointContinued page 185 March 1990 71 CASNES REP tSPRS{INU 5NNN REE /1 SZtONWs-.[DAD PS SOPS ~ZZZDDDONDs- AID ON 50CRDtVZAONClit NSEIlDSN 1111 1D5551is DUDOENS DDRPDN -IDDSSOANIONEs \DIO SDP ROTCDIN PECE-7IDC CRC RI j ODINNLN tttR ROSNNLNMCNS CS DOE Left The completely assembled propeller assembly showing l/6lfl dowel upper notch nose Right very important feature Free Flight ship No matter fail-safe dethermalizer might monster thermal can still carry QOS label identifies ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AMA Membership15 Ace Radio Control5 Aerospace Composite Prod55 Airtronics2 20 AI-Tec & Su-pr-line Products166 Altech MarketingCoy 2 170 American Jr Aircraft Co18 American Small Busn Computers1 Applied Engineering47 Authorized RC Service49 B&P Associates57 BLB168 Quay Barber Models182 Blue Ridge Mach & Tools153 Bolar Hell Research152 Bridi Aircraft140 Dave Brown Products31 Byron Originals87 Ca Ra Products55 Cambridge Model Aircraft8 Campbell Tools Co147 Cheveron168 Cleveland Model Supply16 Competition Products186 Corehouse161 Cove rite166 Cox Hobbies93 Crenshaw Aero57 Culpepper Models Inc184 Cygnet Software12 D&R Aircraft Mfg51 DGA Designs146 Daedalus Research Inc172 Davy Systems Corp153 Dodgson Designs38 Doylejet152 Du-Bro Products Inc96 Duracraft55 FAI Model Supply156 FHS Supply Inc22-23 Fiberglass Master4 Fiorenze Hobby Center146 First RC Flight School153 Flyline Models12 Fourmost Products49 Fults Dual Struts184 Futaba Corp America19 88 G&A Products152 GM Plastics Inc47 57 158 GM Precision Products37 Garuda Gliders147 Gator RC Products43 Carl Goldberg Models13 106 Golden Gate Hobbies174 Phillip Good145 Gorham Model Products173 Great Planes21 Hi Line Ltd176 High Sky180 Hobby Barn142-143 Hobby Dynamics 10 12 18 85 94-95 105 Hobby Horn20 Hobby Lobby International162-165 Hobby Supply South180 Hobby Woods8 Bob Holman Plans156 Ikon Northwest Co141 Indy RC Sales Ac148-150 JCM Company145 JR Radios10 94-95105 JTec182 JammAero144 Jan Crystals20 Larry Jolly Model Products158 Jomar8 K&B Mfg152 K&S Engineering151 K-Flight Industries156 Kingsway Enterprises146 Kraft Midwest51 Kustom Kraftsmanship176 LA Model Hobby Show159 Lanier RC51 Lone Star Models147 MACS Products140 MGA Enterprises144 Memphis Model Market160 Micro Mark6-7 Midwest Products101 Model Rectifier CorpCoy 3 Sid Morgan Plans186 Walt Moucha Models175 Mutchlers Hobbies154-155 NF Video Library31 Northeast Aerodynamics4 Northern Modeling Products38 Northwest Hobby Supply9 Ohio Superstar53 Pacer Tech167 Paper Airplanes Intl173 Parrish Aircraft151 Pattern Tek53 Penn Valley Hobby Center157 Performance Products Ultd174 Performance Specialties174 Pica Products16 Pin-Nik Sales172 Plane Video18 Pro-Tune Corp140 Progress Mfg Co144 RAM182 RC Buyers Guide183 RC Designs176 RC Extras186 RC International17 RC Video Review157 RJL Industries161 Radial Engine Technologies43 Ragan/Barker Group156 Red Max Fuel22-23 Reichmuth Electronics152 Robart11 Rons Model Building144 Rossi USA103 RounTuit57 SAC44 SR Batteries145 Sachs TG186 Safety Plus16 47 Satellite City187 Scale Model Research146 Scale Plans & Photo Ser144 Sermos RC Snap Connectors184 Shamrock Competition Imports171 Sheldons Hobby Shop146 Sig Mfg Co4 83 181 Simple Simon Airplane Co182 Square Cut Tools174 Smith Enterprises181 Stangel Enterprises180 Sun Craft157 Superior Aircraft37 Swanson Assoc176 T&D Fiberglass Spec172 TEAM160 Tatone Products Co55 Tidewater Hobby Enterprises168 Toledo RC Exposition156 Top Flite Models Inc169 Tower Hobbies177-179 Tru-Turn152 US Quadra166 Ultimatesport RC160 VL Products161 Vinylwrite Custom Lettering172 WE Technical Services184 Webra18 Williams Brothers49 Windsor Propeller Co53 Wing Mfg158 World EnginesCover 4 Yashioka12 85 Nick Ziroli Models44 ers use 40-size engines stock mufflers draw common fuel source Rac ing heats four theyre scored two ways finish position after 10 laps first through fourth best lap time Again large number umps officials needed conduct race Fifteen-year-old Jerret Cangie Redmont WA red-hot devotee Unfortu nately Jerret mechanic/flier Bill Petterson Seattle flooded engine failed start up within required 90second window following signal young men told practice lo cal contests about two weeks Diametrically opposite adrenalin scale seems docile Free Flight Scale models both indoor outdoor types aircraft very care fully judged realism fidelity workmanship indicates patience supreme As always Free Flight Scale vari ety great Rubber gas power mod ern antique aircraftwhat treat view such exceptionally fine building skills also envy small boxes needed transport lovely creations Nats like banqueta huge crowd SAFE FLYING IS NO ACCIDENT responding advertisers mention read about ModelAviation diners well regiment servers cooks dishwashers staff gets neither wages nor tips Vince Mankowski quartermaster general headwaiter chief cook bottle washer etc etcarranged little compensation form din ner loyal army DJ old-time music us old folks tripping light fantastic heartwarming touch Vince whatever happened dessert Winter Hawk/ODwyer Continued page 71 Prepare wing covering painting tissue attaches two coats sand ing sealer sanding lightly between coats March 1990 185 OUT OF THE ASHES .. INTO THE IWNNERS CIRCLE PHOENIX T FOR ADOmONAI INFORMATION SEND LSASE greatly improves Japanese tissue adherence Cover bottom surface first good grade Japanese tissue type supplied Peck-Polymers works very well experi ence Attach tissue thick dope rib bottom spar assure accurate lower contour Nitrate thinner brush used slightly release adhering dope pull out wrinkles After wing fin stabilizer com pletely covered spray water shrink taut brush two coats nitrate dope Thin nitrate one-to-one plasticize few drops TCP castor oil before applying Allow dope cure several days check warps No washin washout used gurney flap left tip panel seems eliminate need special warps Steam flat twists present makes wing much easier check prior flying ses sion Propeller Though propeller assembly may appear complicated first really isnt unique prop stop mechanism combines best features several other systems de serves much credit Winter Hawks winning ways convince try Ill list some features mechanism torque actuated tension sensitive rubber motor torque drops about in/oz lever engages tack head stop rotation motor can several inches shorter distance between rear peg prop shaft hook eliminates unpredict able center-of-gravity shifts due rubber bunching end proprun short mo tor also prevents prop assembly falling out would cause disqualification parts SPAN 132 AREA 1047 SQ IN WEIGHT 72- 76 OZ AtAFOIL 54061 WiNGLOAD 10 OZ/SQ FT ASPECT RATIO 1671 COMPETITION PRODUCTS 921 BIRDIE WAY APOLLO BEACH FL 33672 813 648 6171 Sachs Dolmar Engines Customized TG Only 100% SACHS Engine 27 S $38000 31 $38000 34 *40000 37 *43000 42 $45000 add $50 throttle-coupled spark advance New TorqL Mow Engines Complel Nothing Bu See WRAM TOLEDO Shows TG MFG201 427-384 857 High Mtn Rd N Haledon NJ 0750 droppedand probable propeller loss FAL Model Supply Form contour airfoil Torque actuation actually saves altitude con- slight undercamber Its important remember trast tension-type propeller causes the edge greater curve leading nose drop prop slowly finishes last edge few turns torque-actuated prop folds shaped draw pencil line apex still pulling inner curve center tip lever can engaged onto tack head line should about /2 trailing edge prior attaching propeller wound motor its widest point forward surface Locate will prevent prop turning the blade wire line Y10 fold piv flier checks alignment looks indications ot shown drawing Draw around thermals lights fuse youre ready wire blade groove Out accept launch simply rotate hub backwards wire flush surface Use five-minute ep small amount until hear click pro- oxy / plywood doubler secure wire peller free turn use several clothespins clamp plywood un use system rubber-powered til epoxy sets Wakefields Mulvihills folding propel- blades held onto hub small lers has shown 100% reliability brass washers soldered end model make hub Winter Hawk first oh- can tolerate added weight /6-ID inside ditam aluminum Coupe hub FAI Model ameter wheel collars can used shown Supply Either leave huh full length 1% in- photo collars allow rapid blade replaceas shown photo cut off shown ment drawing reduce weight drag Remem- will note greatest blade area forher huh components drawing ward wire places center-of-pres shown twice actual size clarity sure forward elastic axis causing pitch half-size reduction area drawing increase under load gradually reduce local copy machine might help prevent torque decreases Slow-motion videotapes have big mistake confirmed effect also show need parts drawn accurate scale pre- turbulator strips prevent flutter HO modelvent confusion however dimen- railroad-scale 2 x 4-ft pieces basswood seem stoned Drill holes hand drill cut work great turhulator blades out X-Acto jewelers saw file Set blade pitch angle shown drawto shape 10 propeller assemblies ing Adjust angle twisting wire Track using mechanism probably no two ex- tips both tips same plane bend actly alike yet seem work well ing point blade wire acts stop other words stop mechanism does re- against aluminum hub apply dab red quire precision machining Montreal paint tip blade aid tracking type A spinner will protect hub mechanism propeller blades Blue Ridge Models reduce drag Being unable find suitable 1-intwisted very accurately obtain through dia plastic spinner made basswood R/C EXTRAS Introduces Clipped-Wing Taylorcratt 1/4 standoff scale hIgh aerobalic plane has 90 wingspan wes 90 -152 stroke 12- 164 stroke engine Detailed Plans Epoxy-Glass Cowl Hand-Cut Parts Excellent Hardware Pkg Price $20995 4*10 shippIng R/C EXTRAS 1404 Vandenberg Circle W Sergeant Bluff IA 51054 712-943-4102 186 Model Aviation VINTAUE It-C PLAN3 GONSOLIDAT PBY-5A CATALINA 9FT WING SPAN AtL RIBS B FULL FORMERI SHOWN ON PLANS11 PLAsTIC ENGCOWLS $1090 PR CLEAR GUN BLISTERS $ 760 PR 4 LARGE PLAN SHEETS s $1895 6FT WING SPAN MODEL PBY-5A ENGINE COWLS $750 PR Plans $1495 GUN BLISTERS $5SO PR ADD $300 POSTAGE cATALOGOVER 50 PLANS $100 DEALERS WRITE W 43WE SID MORGAN 13157 ORMOND BELLEVILLEMICH 48111 USA Mmjacltusof tie Exira 230 md Weeks Speelci plone Cash Money Orders Z
Edition: Model Aviation - 1990/03
Page Numbers: 68, 69, 70, 71, 185, 186
68 Model Aviation winter events thermals nonexis tent early models nearly 300 sq wing huge propellers making like Indoor models Wakefields class given FAI recog nition designation Flu COUPE DHIVER pronounced dee vair means Winter Cup class model originated France 1944 sim pler alternative Wakefield fact style has often referred /2 Wake Originally designed flown Top The completed Winter Hawk its propel ler blades folded flight mode rest tween flights model has simple struc ture allows fast building repairs clean low-drag shape Above au thor demonstrating motor winding setup good stooge winder torque meter big help reducing contest hassles Winter Hawks wing uses turbulatea okoIov airtoll wing area 164 sq pect ratio 131 small gurney flap used left tip panel maintain flat left glide Winter Hawk t A41 -U f winter hawk primarily white bird na tive Scandinavian countries also found other parts northern Europe As Coupe dHiver grew popularity inevitably came flown summer well summer winds thermals caused problems designs light wing loadings slow climbing characteristics Being difficult DT de thermalize thermals models often lost Sometimes moderate winds dashed ground before could gain enough altitude Consequently evolution has away light wing loadings slow climb much Wakefield-like performance appear ance todays breed small fastclimbing Coupe capable winning com petitions hot summer days moderate winds wont win under conditions added prowess compromise must made using latest technology reli able model also wanted plane could come out top calm days no thermals present Bob White has such model Beau Coupe shied away complicated wing structure curved tips Also carving efficient propeller seemed difficult task found simpler approach harness ing lot new ideas available compo nents came up just model wantedquick-building clean-lined competitive Winter Hawk im mediate success awarded Ft Worth Planesmens Best New Design 1983 has won placed contests since model has accumulated some 20 trophies won Open Coupe 1987 Nats Lincoln NE Basic specifications Winter Hawk follows wing uses tur bulated Sokolov airfoil has area 164 sq aspect ratio 131 small gurney flap used left tip panel maintain flat left glide helps keep thermals propeller uses very effi cient precarved blades available Blue Ridge Models also uses torque-sen sitive prop stop eliminates rubber bunching improves transition climb glide Overall its clean lowdrag shape still meets 31-sq-in cross section requirement model has simple design features allow fast build ing repairs Fuselage Make body single piece /16 sheet balsa light grained 3 x 36 sheet first tapered slightly aft 24 width 1% /6 x 24-in triangle removed side Seal inside two coats thick nitrate dope allowing about two hours beNamed after hawk native Scandinavian countries contest-winning Coupe dHiver evolved some novel ideas ingenius use available materials EJohn R ODwyer tween coats After second coat dry immerse sheet hot water bath tub about 10 minutes balsa starts curling tube wet tube slid onto round mandrel approximately 10 diameter found old pool cue almost perfect Wrap tube Ace bandage other cloth thats similarly stretchy porous Allow day thorough drying body tube drying build wing mount pylon Use three 2/2 x 3-in pieces lightweight even-grained /16 balsa sheet Edge glue together using CyA cyanoacrylate glue 9-in strip grain running vertical Apply coat dope exact center inside will help forming around two ribs shape pylon can transfer con tour ribs plan first Xe roxing paper ironing shape onto balsa sheet Transfer wing stabilizer contours same way two pylon ribs assem March 1990 69 Left The propeller hubs #8 left #9 right number eight hub uses wheel collars secure propeller blades #9 lighter has less drag spinner carved basswood Right Close-up view hub #9 showing simple spinner adapter hubs include best features several different designs Complete construction operating details contained text plans bled two bulkheads form short winglike structure Center long 9-in strip nose about % strip below rib side will attached fuselage Make ply wood wing mount snuffer tube dont mount point Remove th body tube mandrel dry Starting front working toward rear carefully join seam CyA Sand smooth apply coat sanding sealer Sand again lightly wrap tube layer Japanese tissue Use thinned dope adhere tissue smoothing out wrinkles Though will have removed later attachment points various compo nentseg pylon rear rubber support band tail partsits easier apply tissue now rather later building sequence tissue easily removed lightly cutting shape excised brushing thinner area Cut bottom pylon roughly shape finish rubbing fore aft piece 180-grit sandpaper wrapped around body tube Sand seal py lon cover Japanese tissue tach pylon body tube loca tion shown plans tube seam bottom Fin rudder stabilizer DT system Construction fairly straightforward aft spar fin should long enough protrude slightly through bottom strengthen attachment fin should line up vertically pylon flat side fin airfoil parallel body tube centerline Dont attempt stall DT dethermalizer line until glue inside tube fin spar thor oughly dry little sandwich assembly rear could incorporate aluminum tube Teflon has less friction weighs less glue holding forward DT guide dry 12-lb monofilament line fed forward tube until comes out open rear end body tube Slide line tube sandwich assembly Fit latter notch cut upper side body tube carefully glue place short piece A6 aluminum tube used secure end loops DT line squeezing pliers after correct length set stab assembly will have com pleted prior installation Although 600 tilt stabilizer dethermalized position rather extreme its necessary ensure model will fall out ther mal use small nylon screws tail trim adjustments may seem little com plicated theyre much precise re liable shims trim tabs Youll ap preciate extra effort required 2-56 nylon screws FAI Model Supply slightly oversized hold settings very well something isnt true metal screws heavyweight aluminum foil heat sink should tight fit snuffer tube conduct heat away efficiently foil glued pylon tube ce mented place small S-hook formed end open closed end forward loop DT line will help easily re placing small rubberband before flight nose body tube reinforced one-inch-wide band silk nylon graphite cloth liberally coated fiveminute epoxy After epoxy hard cut off nose correct down- sidethrust angles An adjustable protractortriangle great help Cut three small notches front end shown drawing Recoat front edge little epoxy Add small balsa bullet shape rear end unit finished 70 Model Aviation Above Close-up details elevator trim adjusting screw dethermalizer line rear sandwich assembly Right Details rudder adjusting screw rubberband tensions rud der left stabilizer rubberband hoiddowna right wing pylon plywood wing mounting saddle installed Note dethermalizer fuse rubberband heat shield snuffer tube Also note ply-reinforced rear motor peg simple effective motor-restraining system consists pin locked two notches fuselage pressure wound motor until propeller installed Full-Size Plans Available Page 188 - -jANID NC LEFT [DOING ___ F- REP SND SO irITNISSO _____________ I SWE RIP I~CC PEE ___________ 5p5ARE MW L NLR DEENKS SI-OSNA TIRACE SIZE N ROE ODWINE 555 SNE ONNSCRWROICSCRE P SIRE RENDER MOURNING FIN STANRODE rSNANs2D1 DCI NIRS IILI — IEEIRNNELSNPPLRI ANON DIEs- ONES BRIAN _ --- ---s-- PoSE DOSE TSP V EDO/ F SRRREWNRENSS CNN 5 ERON IRSIRE LICNONNO DION7CNDRCE S ED AREURM SINSSSCENTER ONES/SLEINOS sSNN ASS NE 5015550A-AfiDC NOR OSLEFON CO oEDS SIREI / /ES LIRE s-OILS C PR/CSON SNOBOC ROSENINA N OR -5SAN R CAREER MMCS WDT2TEC HAWK COANPE DFUSELAGE SITE V CA S$EDO555 SAC CNSS EDEN NNIS RELODCNN N RANDN N525NANN SNES DLDENLCENEBEE POWERED R RUPEES RESMCNRSERDBION MOREL TEN ION NBC C SON NO ES ACER OEVESES Wing Again fairly straightforward con struction techniques used Make tem plate 22 identical wing ribs trac ing Xerox copy made previously largest rib onto piece aluminum /32 plywood Use template cut out ribs Orient template slightly nose-down wood grain grain paral lel edges narrow rear end rib Stack 22 ribs short piece 46-sq stock upper spar groove sand out imperfections Use sanding block front back edges same length Build two center wing panels first Cover plans wax paper prevent sticking Tak glue small pieces A2 balsa forward edge trailing edge bot tom surface holds proper gle airfoil shape Pin length /6-sq stock plans forward trailing edge rib back ends rest strip tached glue Two ribs used locate leading edge since depending much sanding done ribs up ends its location may ex actly match shown plans Make dime-sized puddle CyA off side Dip leading trailing end rib puddle locate rib tween leading trailing edges Make sure rib straight installed center ribs tilted 70 Add top /16 spar gussets latter very important strengthening thin ribs Note gussets small 30 x 60W triangles grain parallel hypot enuse Remove pins front back edges lift wing panel wax paper Add lower /I6 spar A2 balsa sheeting leading edge easier size install panel free plan Repin panel plan outer end pinned down line tip panel center rib raised 3/2 surface Glue leading trailing edges spars A2 balsa sheeting directly center panel build out board tip panels vertical-grained spar webs joint should tight fit against transi tion rib Sand wing half correct leading trailing edge shape Its easier now both halves joined center panel pinned build ing board trial fit other panel center supporting shown plan Some sanding may necessary match rib surfaces satisfied glue panels together add /2-in-wide strip silk graphite reinforcing cloth over top joint Remove structure board add spar webs have some CyA few 6-in-long strands graphite glass fiber bottom side leading trailing edges top spar across center jointContinued page 185 March 1990 71 CASNES REP tSPRS{INU 5NNN REE /1 SZtONWs-.[DAD PS SOPS ~ZZZDDDONDs- AID ON 50CRDtVZAONClit NSEIlDSN 1111 1D5551is DUDOENS DDRPDN -IDDSSOANIONEs \DIO SDP ROTCDIN PECE-7IDC CRC RI j ODINNLN tttR ROSNNLNMCNS CS DOE Left The completely assembled propeller assembly showing l/6lfl dowel upper notch nose Right very important feature Free Flight ship No matter fail-safe dethermalizer might monster thermal can still carry QOS label identifies ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AMA Membership15 Ace Radio Control5 Aerospace Composite Prod55 Airtronics2 20 AI-Tec & Su-pr-line Products166 Altech MarketingCoy 2 170 American Jr Aircraft Co18 American Small Busn Computers1 Applied Engineering47 Authorized RC Service49 B&P Associates57 BLB168 Quay Barber Models182 Blue Ridge Mach & Tools153 Bolar Hell Research152 Bridi Aircraft140 Dave Brown Products31 Byron Originals87 Ca Ra Products55 Cambridge Model Aircraft8 Campbell Tools Co147 Cheveron168 Cleveland Model Supply16 Competition Products186 Corehouse161 Cove rite166 Cox Hobbies93 Crenshaw Aero57 Culpepper Models Inc184 Cygnet Software12 D&R Aircraft Mfg51 DGA Designs146 Daedalus Research Inc172 Davy Systems Corp153 Dodgson Designs38 Doylejet152 Du-Bro Products Inc96 Duracraft55 FAI Model Supply156 FHS Supply Inc22-23 Fiberglass Master4 Fiorenze Hobby Center146 First RC Flight School153 Flyline Models12 Fourmost Products49 Fults Dual Struts184 Futaba Corp America19 88 G&A Products152 GM Plastics Inc47 57 158 GM Precision Products37 Garuda Gliders147 Gator RC Products43 Carl Goldberg Models13 106 Golden Gate Hobbies174 Phillip Good145 Gorham Model Products173 Great Planes21 Hi Line Ltd176 High Sky180 Hobby Barn142-143 Hobby Dynamics 10 12 18 85 94-95 105 Hobby Horn20 Hobby Lobby International162-165 Hobby Supply South180 Hobby Woods8 Bob Holman Plans156 Ikon Northwest Co141 Indy RC Sales Ac148-150 JCM Company145 JR Radios10 94-95105 JTec182 JammAero144 Jan Crystals20 Larry Jolly Model Products158 Jomar8 K&B Mfg152 K&S Engineering151 K-Flight Industries156 Kingsway Enterprises146 Kraft Midwest51 Kustom Kraftsmanship176 LA Model Hobby Show159 Lanier RC51 Lone Star Models147 MACS Products140 MGA Enterprises144 Memphis Model Market160 Micro Mark6-7 Midwest Products101 Model Rectifier CorpCoy 3 Sid Morgan Plans186 Walt Moucha Models175 Mutchlers Hobbies154-155 NF Video Library31 Northeast Aerodynamics4 Northern Modeling Products38 Northwest Hobby Supply9 Ohio Superstar53 Pacer Tech167 Paper Airplanes Intl173 Parrish Aircraft151 Pattern Tek53 Penn Valley Hobby Center157 Performance Products Ultd174 Performance Specialties174 Pica Products16 Pin-Nik Sales172 Plane Video18 Pro-Tune Corp140 Progress Mfg Co144 RAM182 RC Buyers Guide183 RC Designs176 RC Extras186 RC International17 RC Video Review157 RJL Industries161 Radial Engine Technologies43 Ragan/Barker Group156 Red Max Fuel22-23 Reichmuth Electronics152 Robart11 Rons Model Building144 Rossi USA103 RounTuit57 SAC44 SR Batteries145 Sachs TG186 Safety Plus16 47 Satellite City187 Scale Model Research146 Scale Plans & Photo Ser144 Sermos RC Snap Connectors184 Shamrock Competition Imports171 Sheldons Hobby Shop146 Sig Mfg Co4 83 181 Simple Simon Airplane Co182 Square Cut Tools174 Smith Enterprises181 Stangel Enterprises180 Sun Craft157 Superior Aircraft37 Swanson Assoc176 T&D Fiberglass Spec172 TEAM160 Tatone Products Co55 Tidewater Hobby Enterprises168 Toledo RC Exposition156 Top Flite Models Inc169 Tower Hobbies177-179 Tru-Turn152 US Quadra166 Ultimatesport RC160 VL Products161 Vinylwrite Custom Lettering172 WE Technical Services184 Webra18 Williams Brothers49 Windsor Propeller Co53 Wing Mfg158 World EnginesCover 4 Yashioka12 85 Nick Ziroli Models44 ers use 40-size engines stock mufflers draw common fuel source Rac ing heats four theyre scored two ways finish position after 10 laps first through fourth best lap time Again large number umps officials needed conduct race Fifteen-year-old Jerret Cangie Redmont WA red-hot devotee Unfortu nately Jerret mechanic/flier Bill Petterson Seattle flooded engine failed start up within required 90second window following signal young men told practice lo cal contests about two weeks Diametrically opposite adrenalin scale seems docile Free Flight Scale models both indoor outdoor types aircraft very care fully judged realism fidelity workmanship indicates patience supreme As always Free Flight Scale vari ety great Rubber gas power mod ern antique aircraftwhat treat view such exceptionally fine building skills also envy small boxes needed transport lovely creations Nats like banqueta huge crowd SAFE FLYING IS NO ACCIDENT responding advertisers mention read about ModelAviation diners well regiment servers cooks dishwashers staff gets neither wages nor tips Vince Mankowski quartermaster general headwaiter chief cook bottle washer etc etcarranged little compensation form din ner loyal army DJ old-time music us old folks tripping light fantastic heartwarming touch Vince whatever happened dessert Winter Hawk/ODwyer Continued page 71 Prepare wing covering painting tissue attaches two coats sand ing sealer sanding lightly between coats March 1990 185 OUT OF THE ASHES .. INTO THE IWNNERS CIRCLE PHOENIX T FOR ADOmONAI INFORMATION SEND LSASE greatly improves Japanese tissue adherence Cover bottom surface first good grade Japanese tissue type supplied Peck-Polymers works very well experi ence Attach tissue thick dope rib bottom spar assure accurate lower contour Nitrate thinner brush used slightly release adhering dope pull out wrinkles After wing fin stabilizer com pletely covered spray water shrink taut brush two coats nitrate dope Thin nitrate one-to-one plasticize few drops TCP castor oil before applying Allow dope cure several days check warps No washin washout used gurney flap left tip panel seems eliminate need special warps Steam flat twists present makes wing much easier check prior flying ses sion Propeller Though propeller assembly may appear complicated first really isnt unique prop stop mechanism combines best features several other systems de serves much credit Winter Hawks winning ways convince try Ill list some features mechanism torque actuated tension sensitive rubber motor torque drops about in/oz lever engages tack head stop rotation motor can several inches shorter distance between rear peg prop shaft hook eliminates unpredict able center-of-gravity shifts due rubber bunching end proprun short mo tor also prevents prop assembly falling out would cause disqualification parts SPAN 132 AREA 1047 SQ IN WEIGHT 72- 76 OZ AtAFOIL 54061 WiNGLOAD 10 OZ/SQ FT ASPECT RATIO 1671 COMPETITION PRODUCTS 921 BIRDIE WAY APOLLO BEACH FL 33672 813 648 6171 Sachs Dolmar Engines Customized TG Only 100% SACHS Engine 27 S $38000 31 $38000 34 *40000 37 *43000 42 $45000 add $50 throttle-coupled spark advance New TorqL Mow Engines Complel Nothing Bu See WRAM TOLEDO Shows TG MFG201 427-384 857 High Mtn Rd N Haledon NJ 0750 droppedand probable propeller loss FAL Model Supply Form contour airfoil Torque actuation actually saves altitude con- slight undercamber Its important remember trast tension-type propeller causes the edge greater curve leading nose drop prop slowly finishes last edge few turns torque-actuated prop folds shaped draw pencil line apex still pulling inner curve center tip lever can engaged onto tack head line should about /2 trailing edge prior attaching propeller wound motor its widest point forward surface Locate will prevent prop turning the blade wire line Y10 fold piv flier checks alignment looks indications ot shown drawing Draw around thermals lights fuse youre ready wire blade groove Out accept launch simply rotate hub backwards wire flush surface Use five-minute ep small amount until hear click pro- oxy / plywood doubler secure wire peller free turn use several clothespins clamp plywood un use system rubber-powered til epoxy sets Wakefields Mulvihills folding propel- blades held onto hub small lers has shown 100% reliability brass washers soldered end model make hub Winter Hawk first oh- can tolerate added weight /6-ID inside ditam aluminum Coupe hub FAI Model ameter wheel collars can used shown Supply Either leave huh full length 1% in- photo collars allow rapid blade replaceas shown photo cut off shown ment drawing reduce weight drag Remem- will note greatest blade area forher huh components drawing ward wire places center-of-pres shown twice actual size clarity sure forward elastic axis causing pitch half-size reduction area drawing increase under load gradually reduce local copy machine might help prevent torque decreases Slow-motion videotapes have big mistake confirmed effect also show need parts drawn accurate scale pre- turbulator strips prevent flutter HO modelvent confusion however dimen- railroad-scale 2 x 4-ft pieces basswood seem stoned Drill holes hand drill cut work great turhulator blades out X-Acto jewelers saw file Set blade pitch angle shown drawto shape 10 propeller assemblies ing Adjust angle twisting wire Track using mechanism probably no two ex- tips both tips same plane bend actly alike yet seem work well ing point blade wire acts stop other words stop mechanism does re- against aluminum hub apply dab red quire precision machining Montreal paint tip blade aid tracking type A spinner will protect hub mechanism propeller blades Blue Ridge Models reduce drag Being unable find suitable 1-intwisted very accurately obtain through dia plastic spinner made basswood R/C EXTRAS Introduces Clipped-Wing Taylorcratt 1/4 standoff scale hIgh aerobalic plane has 90 wingspan wes 90 -152 stroke 12- 164 stroke engine Detailed Plans Epoxy-Glass Cowl Hand-Cut Parts Excellent Hardware Pkg Price $20995 4*10 shippIng R/C EXTRAS 1404 Vandenberg Circle W Sergeant Bluff IA 51054 712-943-4102 186 Model Aviation VINTAUE It-C PLAN3 GONSOLIDAT PBY-5A CATALINA 9FT WING SPAN AtL RIBS B FULL FORMERI SHOWN ON PLANS11 PLAsTIC ENGCOWLS $1090 PR CLEAR GUN BLISTERS $ 760 PR 4 LARGE PLAN SHEETS s $1895 6FT WING SPAN MODEL PBY-5A ENGINE COWLS $750 PR Plans $1495 GUN BLISTERS $5SO PR ADD $300 POSTAGE cATALOGOVER 50 PLANS $100 DEALERS WRITE W 43WE SID MORGAN 13157 ORMOND BELLEVILLEMICH 48111 USA Mmjacltusof tie Exira 230 md Weeks Speelci plone Cash Money Orders Z
Edition: Model Aviation - 1990/03
Page Numbers: 68, 69, 70, 71, 185, 186
68 Model Aviation winter events thermals nonexis tent early models nearly 300 sq wing huge propellers making like Indoor models Wakefields class given FAI recog nition designation Flu COUPE DHIVER pronounced dee vair means Winter Cup class model originated France 1944 sim pler alternative Wakefield fact style has often referred /2 Wake Originally designed flown Top The completed Winter Hawk its propel ler blades folded flight mode rest tween flights model has simple struc ture allows fast building repairs clean low-drag shape Above au thor demonstrating motor winding setup good stooge winder torque meter big help reducing contest hassles Winter Hawks wing uses turbulatea okoIov airtoll wing area 164 sq pect ratio 131 small gurney flap used left tip panel maintain flat left glide Winter Hawk t A41 -U f winter hawk primarily white bird na tive Scandinavian countries also found other parts northern Europe As Coupe dHiver grew popularity inevitably came flown summer well summer winds thermals caused problems designs light wing loadings slow climbing characteristics Being difficult DT de thermalize thermals models often lost Sometimes moderate winds dashed ground before could gain enough altitude Consequently evolution has away light wing loadings slow climb much Wakefield-like performance appear ance todays breed small fastclimbing Coupe capable winning com petitions hot summer days moderate winds wont win under conditions added prowess compromise must made using latest technology reli able model also wanted plane could come out top calm days no thermals present Bob White has such model Beau Coupe shied away complicated wing structure curved tips Also carving efficient propeller seemed difficult task found simpler approach harness ing lot new ideas available compo nents came up just model wantedquick-building clean-lined competitive Winter Hawk im mediate success awarded Ft Worth Planesmens Best New Design 1983 has won placed contests since model has accumulated some 20 trophies won Open Coupe 1987 Nats Lincoln NE Basic specifications Winter Hawk follows wing uses tur bulated Sokolov airfoil has area 164 sq aspect ratio 131 small gurney flap used left tip panel maintain flat left glide helps keep thermals propeller uses very effi cient precarved blades available Blue Ridge Models also uses torque-sen sitive prop stop eliminates rubber bunching improves transition climb glide Overall its clean lowdrag shape still meets 31-sq-in cross section requirement model has simple design features allow fast build ing repairs Fuselage Make body single piece /16 sheet balsa light grained 3 x 36 sheet first tapered slightly aft 24 width 1% /6 x 24-in triangle removed side Seal inside two coats thick nitrate dope allowing about two hours beNamed after hawk native Scandinavian countries contest-winning Coupe dHiver evolved some novel ideas ingenius use available materials EJohn R ODwyer tween coats After second coat dry immerse sheet hot water bath tub about 10 minutes balsa starts curling tube wet tube slid onto round mandrel approximately 10 diameter found old pool cue almost perfect Wrap tube Ace bandage other cloth thats similarly stretchy porous Allow day thorough drying body tube drying build wing mount pylon Use three 2/2 x 3-in pieces lightweight even-grained /16 balsa sheet Edge glue together using CyA cyanoacrylate glue 9-in strip grain running vertical Apply coat dope exact center inside will help forming around two ribs shape pylon can transfer con tour ribs plan first Xe roxing paper ironing shape onto balsa sheet Transfer wing stabilizer contours same way two pylon ribs assem March 1990 69 Left The propeller hubs #8 left #9 right number eight hub uses wheel collars secure propeller blades #9 lighter has less drag spinner carved basswood Right Close-up view hub #9 showing simple spinner adapter hubs include best features several different designs Complete construction operating details contained text plans bled two bulkheads form short winglike structure Center long 9-in strip nose about % strip below rib side will attached fuselage Make ply wood wing mount snuffer tube dont mount point Remove th body tube mandrel dry Starting front working toward rear carefully join seam CyA Sand smooth apply coat sanding sealer Sand again lightly wrap tube layer Japanese tissue Use thinned dope adhere tissue smoothing out wrinkles Though will have removed later attachment points various compo nentseg pylon rear rubber support band tail partsits easier apply tissue now rather later building sequence tissue easily removed lightly cutting shape excised brushing thinner area Cut bottom pylon roughly shape finish rubbing fore aft piece 180-grit sandpaper wrapped around body tube Sand seal py lon cover Japanese tissue tach pylon body tube loca tion shown plans tube seam bottom Fin rudder stabilizer DT system Construction fairly straightforward aft spar fin should long enough protrude slightly through bottom strengthen attachment fin should line up vertically pylon flat side fin airfoil parallel body tube centerline Dont attempt stall DT dethermalizer line until glue inside tube fin spar thor oughly dry little sandwich assembly rear could incorporate aluminum tube Teflon has less friction weighs less glue holding forward DT guide dry 12-lb monofilament line fed forward tube until comes out open rear end body tube Slide line tube sandwich assembly Fit latter notch cut upper side body tube carefully glue place short piece A6 aluminum tube used secure end loops DT line squeezing pliers after correct length set stab assembly will have com pleted prior installation Although 600 tilt stabilizer dethermalized position rather extreme its necessary ensure model will fall out ther mal use small nylon screws tail trim adjustments may seem little com plicated theyre much precise re liable shims trim tabs Youll ap preciate extra effort required 2-56 nylon screws FAI Model Supply slightly oversized hold settings very well something isnt true metal screws heavyweight aluminum foil heat sink should tight fit snuffer tube conduct heat away efficiently foil glued pylon tube ce mented place small S-hook formed end open closed end forward loop DT line will help easily re placing small rubberband before flight nose body tube reinforced one-inch-wide band silk nylon graphite cloth liberally coated fiveminute epoxy After epoxy hard cut off nose correct down- sidethrust angles An adjustable protractortriangle great help Cut three small notches front end shown drawing Recoat front edge little epoxy Add small balsa bullet shape rear end unit finished 70 Model Aviation Above Close-up details elevator trim adjusting screw dethermalizer line rear sandwich assembly Right Details rudder adjusting screw rubberband tensions rud der left stabilizer rubberband hoiddowna right wing pylon plywood wing mounting saddle installed Note dethermalizer fuse rubberband heat shield snuffer tube Also note ply-reinforced rear motor peg simple effective motor-restraining system consists pin locked two notches fuselage pressure wound motor until propeller installed Full-Size Plans Available Page 188 - -jANID NC LEFT [DOING ___ F- REP SND SO irITNISSO _____________ I SWE RIP I~CC PEE ___________ 5p5ARE MW L NLR DEENKS SI-OSNA TIRACE SIZE N ROE ODWINE 555 SNE ONNSCRWROICSCRE P SIRE RENDER MOURNING FIN STANRODE rSNANs2D1 DCI NIRS IILI — IEEIRNNELSNPPLRI ANON DIEs- ONES BRIAN _ --- ---s-- PoSE DOSE TSP V EDO/ F SRRREWNRENSS CNN 5 ERON IRSIRE LICNONNO DION7CNDRCE S ED AREURM SINSSSCENTER ONES/SLEINOS sSNN ASS NE 5015550A-AfiDC NOR OSLEFON CO oEDS SIREI / /ES LIRE s-OILS C PR/CSON SNOBOC ROSENINA N OR -5SAN R CAREER MMCS WDT2TEC HAWK COANPE DFUSELAGE SITE V CA S$EDO555 SAC CNSS EDEN NNIS RELODCNN N RANDN N525NANN SNES DLDENLCENEBEE POWERED R RUPEES RESMCNRSERDBION MOREL TEN ION NBC C SON NO ES ACER OEVESES Wing Again fairly straightforward con struction techniques used Make tem plate 22 identical wing ribs trac ing Xerox copy made previously largest rib onto piece aluminum /32 plywood Use template cut out ribs Orient template slightly nose-down wood grain grain paral lel edges narrow rear end rib Stack 22 ribs short piece 46-sq stock upper spar groove sand out imperfections Use sanding block front back edges same length Build two center wing panels first Cover plans wax paper prevent sticking Tak glue small pieces A2 balsa forward edge trailing edge bot tom surface holds proper gle airfoil shape Pin length /6-sq stock plans forward trailing edge rib back ends rest strip tached glue Two ribs used locate leading edge since depending much sanding done ribs up ends its location may ex actly match shown plans Make dime-sized puddle CyA off side Dip leading trailing end rib puddle locate rib tween leading trailing edges Make sure rib straight installed center ribs tilted 70 Add top /16 spar gussets latter very important strengthening thin ribs Note gussets small 30 x 60W triangles grain parallel hypot enuse Remove pins front back edges lift wing panel wax paper Add lower /I6 spar A2 balsa sheeting leading edge easier size install panel free plan Repin panel plan outer end pinned down line tip panel center rib raised 3/2 surface Glue leading trailing edges spars A2 balsa sheeting directly center panel build out board tip panels vertical-grained spar webs joint should tight fit against transi tion rib Sand wing half correct leading trailing edge shape Its easier now both halves joined center panel pinned build ing board trial fit other panel center supporting shown plan Some sanding may necessary match rib surfaces satisfied glue panels together add /2-in-wide strip silk graphite reinforcing cloth over top joint Remove structure board add spar webs have some CyA few 6-in-long strands graphite glass fiber bottom side leading trailing edges top spar across center jointContinued page 185 March 1990 71 CASNES REP tSPRS{INU 5NNN REE /1 SZtONWs-.[DAD PS SOPS ~ZZZDDDONDs- AID ON 50CRDtVZAONClit NSEIlDSN 1111 1D5551is DUDOENS DDRPDN -IDDSSOANIONEs \DIO SDP ROTCDIN PECE-7IDC CRC RI j ODINNLN tttR ROSNNLNMCNS CS DOE Left The completely assembled propeller assembly showing l/6lfl dowel upper notch nose Right very important feature Free Flight ship No matter fail-safe dethermalizer might monster thermal can still carry QOS label identifies ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AMA Membership15 Ace Radio Control5 Aerospace Composite Prod55 Airtronics2 20 AI-Tec & Su-pr-line Products166 Altech MarketingCoy 2 170 American Jr Aircraft Co18 American Small Busn Computers1 Applied Engineering47 Authorized RC Service49 B&P Associates57 BLB168 Quay Barber Models182 Blue Ridge Mach & Tools153 Bolar Hell Research152 Bridi Aircraft140 Dave Brown Products31 Byron Originals87 Ca Ra Products55 Cambridge Model Aircraft8 Campbell Tools Co147 Cheveron168 Cleveland Model Supply16 Competition Products186 Corehouse161 Cove rite166 Cox Hobbies93 Crenshaw Aero57 Culpepper Models Inc184 Cygnet Software12 D&R Aircraft Mfg51 DGA Designs146 Daedalus Research Inc172 Davy Systems Corp153 Dodgson Designs38 Doylejet152 Du-Bro Products Inc96 Duracraft55 FAI Model Supply156 FHS Supply Inc22-23 Fiberglass Master4 Fiorenze Hobby Center146 First RC Flight School153 Flyline Models12 Fourmost Products49 Fults Dual Struts184 Futaba Corp America19 88 G&A Products152 GM Plastics Inc47 57 158 GM Precision Products37 Garuda Gliders147 Gator RC Products43 Carl Goldberg Models13 106 Golden Gate Hobbies174 Phillip Good145 Gorham Model Products173 Great Planes21 Hi Line Ltd176 High Sky180 Hobby Barn142-143 Hobby Dynamics 10 12 18 85 94-95 105 Hobby Horn20 Hobby Lobby International162-165 Hobby Supply South180 Hobby Woods8 Bob Holman Plans156 Ikon Northwest Co141 Indy RC Sales Ac148-150 JCM Company145 JR Radios10 94-95105 JTec182 JammAero144 Jan Crystals20 Larry Jolly Model Products158 Jomar8 K&B Mfg152 K&S Engineering151 K-Flight Industries156 Kingsway Enterprises146 Kraft Midwest51 Kustom Kraftsmanship176 LA Model Hobby Show159 Lanier RC51 Lone Star Models147 MACS Products140 MGA Enterprises144 Memphis Model Market160 Micro Mark6-7 Midwest Products101 Model Rectifier CorpCoy 3 Sid Morgan Plans186 Walt Moucha Models175 Mutchlers Hobbies154-155 NF Video Library31 Northeast Aerodynamics4 Northern Modeling Products38 Northwest Hobby Supply9 Ohio Superstar53 Pacer Tech167 Paper Airplanes Intl173 Parrish Aircraft151 Pattern Tek53 Penn Valley Hobby Center157 Performance Products Ultd174 Performance Specialties174 Pica Products16 Pin-Nik Sales172 Plane Video18 Pro-Tune Corp140 Progress Mfg Co144 RAM182 RC Buyers Guide183 RC Designs176 RC Extras186 RC International17 RC Video Review157 RJL Industries161 Radial Engine Technologies43 Ragan/Barker Group156 Red Max Fuel22-23 Reichmuth Electronics152 Robart11 Rons Model Building144 Rossi USA103 RounTuit57 SAC44 SR Batteries145 Sachs TG186 Safety Plus16 47 Satellite City187 Scale Model Research146 Scale Plans & Photo Ser144 Sermos RC Snap Connectors184 Shamrock Competition Imports171 Sheldons Hobby Shop146 Sig Mfg Co4 83 181 Simple Simon Airplane Co182 Square Cut Tools174 Smith Enterprises181 Stangel Enterprises180 Sun Craft157 Superior Aircraft37 Swanson Assoc176 T&D Fiberglass Spec172 TEAM160 Tatone Products Co55 Tidewater Hobby Enterprises168 Toledo RC Exposition156 Top Flite Models Inc169 Tower Hobbies177-179 Tru-Turn152 US Quadra166 Ultimatesport RC160 VL Products161 Vinylwrite Custom Lettering172 WE Technical Services184 Webra18 Williams Brothers49 Windsor Propeller Co53 Wing Mfg158 World EnginesCover 4 Yashioka12 85 Nick Ziroli Models44 ers use 40-size engines stock mufflers draw common fuel source Rac ing heats four theyre scored two ways finish position after 10 laps first through fourth best lap time Again large number umps officials needed conduct race Fifteen-year-old Jerret Cangie Redmont WA red-hot devotee Unfortu nately Jerret mechanic/flier Bill Petterson Seattle flooded engine failed start up within required 90second window following signal young men told practice lo cal contests about two weeks Diametrically opposite adrenalin scale seems docile Free Flight Scale models both indoor outdoor types aircraft very care fully judged realism fidelity workmanship indicates patience supreme As always Free Flight Scale vari ety great Rubber gas power mod ern antique aircraftwhat treat view such exceptionally fine building skills also envy small boxes needed transport lovely creations Nats like banqueta huge crowd SAFE FLYING IS NO ACCIDENT responding advertisers mention read about ModelAviation diners well regiment servers cooks dishwashers staff gets neither wages nor tips Vince Mankowski quartermaster general headwaiter chief cook bottle washer etc etcarranged little compensation form din ner loyal army DJ old-time music us old folks tripping light fantastic heartwarming touch Vince whatever happened dessert Winter Hawk/ODwyer Continued page 71 Prepare wing covering painting tissue attaches two coats sand ing sealer sanding lightly between coats March 1990 185 OUT OF THE ASHES .. INTO THE IWNNERS CIRCLE PHOENIX T FOR ADOmONAI INFORMATION SEND LSASE greatly improves Japanese tissue adherence Cover bottom surface first good grade Japanese tissue type supplied Peck-Polymers works very well experi ence Attach tissue thick dope rib bottom spar assure accurate lower contour Nitrate thinner brush used slightly release adhering dope pull out wrinkles After wing fin stabilizer com pletely covered spray water shrink taut brush two coats nitrate dope Thin nitrate one-to-one plasticize few drops TCP castor oil before applying Allow dope cure several days check warps No washin washout used gurney flap left tip panel seems eliminate need special warps Steam flat twists present makes wing much easier check prior flying ses sion Propeller Though propeller assembly may appear complicated first really isnt unique prop stop mechanism combines best features several other systems de serves much credit Winter Hawks winning ways convince try Ill list some features mechanism torque actuated tension sensitive rubber motor torque drops about in/oz lever engages tack head stop rotation motor can several inches shorter distance between rear peg prop shaft hook eliminates unpredict able center-of-gravity shifts due rubber bunching end proprun short mo tor also prevents prop assembly falling out would cause disqualification parts SPAN 132 AREA 1047 SQ IN WEIGHT 72- 76 OZ AtAFOIL 54061 WiNGLOAD 10 OZ/SQ FT ASPECT RATIO 1671 COMPETITION PRODUCTS 921 BIRDIE WAY APOLLO BEACH FL 33672 813 648 6171 Sachs Dolmar Engines Customized TG Only 100% SACHS Engine 27 S $38000 31 $38000 34 *40000 37 *43000 42 $45000 add $50 throttle-coupled spark advance New TorqL Mow Engines Complel Nothing Bu See WRAM TOLEDO Shows TG MFG201 427-384 857 High Mtn Rd N Haledon NJ 0750 droppedand probable propeller loss FAL Model Supply Form contour airfoil Torque actuation actually saves altitude con- slight undercamber Its important remember trast tension-type propeller causes the edge greater curve leading nose drop prop slowly finishes last edge few turns torque-actuated prop folds shaped draw pencil line apex still pulling inner curve center tip lever can engaged onto tack head line should about /2 trailing edge prior attaching propeller wound motor its widest point forward surface Locate will prevent prop turning the blade wire line Y10 fold piv flier checks alignment looks indications ot shown drawing Draw around thermals lights fuse youre ready wire blade groove Out accept launch simply rotate hub backwards wire flush surface Use five-minute ep small amount until hear click pro- oxy / plywood doubler secure wire peller free turn use several clothespins clamp plywood un use system rubber-powered til epoxy sets Wakefields Mulvihills folding propel- blades held onto hub small lers has shown 100% reliability brass washers soldered end model make hub Winter Hawk first oh- can tolerate added weight /6-ID inside ditam aluminum Coupe hub FAI Model ameter wheel collars can used shown Supply Either leave huh full length 1% in- photo collars allow rapid blade replaceas shown photo cut off shown ment drawing reduce weight drag Remem- will note greatest blade area forher huh components drawing ward wire places center-of-pres shown twice actual size clarity sure forward elastic axis causing pitch half-size reduction area drawing increase under load gradually reduce local copy machine might help prevent torque decreases Slow-motion videotapes have big mistake confirmed effect also show need parts drawn accurate scale pre- turbulator strips prevent flutter HO modelvent confusion however dimen- railroad-scale 2 x 4-ft pieces basswood seem stoned Drill holes hand drill cut work great turhulator blades out X-Acto jewelers saw file Set blade pitch angle shown drawto shape 10 propeller assemblies ing Adjust angle twisting wire Track using mechanism probably no two ex- tips both tips same plane bend actly alike yet seem work well ing point blade wire acts stop other words stop mechanism does re- against aluminum hub apply dab red quire precision machining Montreal paint tip blade aid tracking type A spinner will protect hub mechanism propeller blades Blue Ridge Models reduce drag Being unable find suitable 1-intwisted very accurately obtain through dia plastic spinner made basswood R/C EXTRAS Introduces Clipped-Wing Taylorcratt 1/4 standoff scale hIgh aerobalic plane has 90 wingspan wes 90 -152 stroke 12- 164 stroke engine Detailed Plans Epoxy-Glass Cowl Hand-Cut Parts Excellent Hardware Pkg Price $20995 4*10 shippIng R/C EXTRAS 1404 Vandenberg Circle W Sergeant Bluff IA 51054 712-943-4102 186 Model Aviation VINTAUE It-C PLAN3 GONSOLIDAT PBY-5A CATALINA 9FT WING SPAN AtL RIBS B FULL FORMERI SHOWN ON PLANS11 PLAsTIC ENGCOWLS $1090 PR CLEAR GUN BLISTERS $ 760 PR 4 LARGE PLAN SHEETS s $1895 6FT WING SPAN MODEL PBY-5A ENGINE COWLS $750 PR Plans $1495 GUN BLISTERS $5SO PR ADD $300 POSTAGE cATALOGOVER 50 PLANS $100 DEALERS WRITE W 43WE SID MORGAN 13157 ORMOND 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