The prototype unique two-place turboprop military trainer produced Brazil Ourauthors66-in-span RCSport Scale version 75 engine flies smoothly nearly responsively good Pattern airplane EJoseph R Naber AS MOST model builders inclined sitting work room waiting last coat paint dry latest creation started wonder what should work next Having built previous Scale models tail draggers decided time find suitable subject tricycle gear setup thought would give aging fin gers little help during takeoff landing proce dures may have noticed too noncivilian aircraft around days have tricycle gear also prop-driven thorough review aircraft nth able througn aero uthor learne ri mu abouth linethe books did nothing help matteruntil picked up then-current issue Aircraft International magazine ad Brazilian EMB-31 2 Tucano twin-seat turboprop trainer minute saw photo knew features aircraft wanted build model form wrote sales office listed England several weeks later kind enough send very detailed brochure pictures three-view draw ings After reviewing litera ture knew instantly made right choice EMB-31 2Tucano built EMBRAER Company Brazil designated T 27 Brazilian Air Force tandem-seat trainer pow ered Pratt Whitney PT6A-25C free turbine engine developing 750 static hp driving three-bladed Hartzell propeller Maximum speed 253 knots 291 mph unique incorporating Martin-Baker ejection seats although trainer one-piece canopy hinges side easy entry exit aircraft stressed plus six minus three gravities allowing perform com plete range aerobatic ma neuvers Tucano now being used Brazilian Air Force flight demonstration team very exte tide Tucano January 1983 issue ternational magazine Number 1 last repor copies issue wu able fora accepte Brazil trying sell aircraft other countriesand has sold some Egypt near future should seeing some varied paint schemes modeling use above information developed model plans using projector enlarge three-views size needed influenced several kit models recently built having larger 60 engines wingspans 60 found models flew much nicer models heavier wing loadings used build After examining several wingspan power plant combinations settled 90 engine 68-in wingspan As model developed began feel 90 engine would too powerful changed 75 cu Supertigre has proved very effective has served quite well also know now good 60 engine has plenty power fly aircraftdue models lightness its size its aerodynamically clean configuration proceeded draw up plans adding formers other details required After several preliminary sketches shuffling pieces arrived final setup thought wanted amazing much time can spend deciding several assembly methods use what will give best results efficient use materials simple things take timelike should wing bolted front should dowel-and-hole arrange ment used Consideration radio gear wing construction various other items come play during choice pro cess Ultimately what enjoyable get use construction methods comfortable use materials suit building tech niques best deviation scale make model location nose gear strut Because inverted engine move rearward however nearly noticeable side-mounted-engine alternative would cylinder sticking out breeze elected have retracting landing gear flaps also decided install bomb dropping mechanisms wing pylons however shown plans Construction text written see tightly-cowled engine tur bo exhaust stacks hand-flied alumi num nose gear mounted landing light assumption have varied know ledge building techniques have some familiarity ideas materials used model past square fuselage type model may have trouble aspect unless have some experienced friends can help out hasnt tried build model before knew everything about what doing As matter fact did very thing project learn After reading article through will see will have learn form clear plastic canopy make fiberglass cowl Making items prototype model first time both worked out quite well After reading made canopy mold decide yours same way must adjust cutting fuselage formers include uppermost part formers correct outline canopy shown must make allowance thickness balsa sheeting Len oupenigre uu engine iiueu wuit ier Fiberglass exhaust stacks open engine area allow nested air escape Right Velcro strips hold dummy gas tank wing pylon Music wire pins front rear Velcro assure tank alignment 28 Model Aviation Weii-baianced layout turboprop design makes easy see wny seversi mla-ast countries buying Brazilian Tucano torthelrtralning programs Photos bythe author engine cooling Inlet very effective air goes directly over engines cylin der head Note small hole feed carb NASA scoop glow plug access Fuselage Start cutting out form ers Use medium weight balsa throughout leave heavy stuff hobby shop next guys slab-sided fuselage tail moment long lightness tail area will pay big dividends lessening amount ballast may need nose Formers 1 2 3 4 must reviewed altered necessary suit engine bearer spacing needed particular engine made bearers little oversize could trim suit later time Former 1 must also sized time fit spinner will use use balsa fuel tank com partment floor feel member helps absorb forces forward-mount ed nose landing gear box Use retract gear other type shownwill necessi tate some revision formers mounting box Keep front gear box least Ys engine cylinder proper airflow inside cowling Again adjust fit particular engine muffler Model all-balsa resin base finish Final finish K&B Superpoxy de tailing done use Liquid Masking Film Text detaiisthis quick easytrimming system side view plans note show alsa longerons top bottom fuselage omis sion clarity formers show cuts pieces Before assembly begins mark rear formers pen about de edges After fuselage together almost completely planked can use outline hollow out centers formers lightness after planking completed inner strengthweightis needed Splice /4 sq balsa pieces make correct number longerons will go end fuselage other Glue two /4 sq longerons side Formers 4 5 clamp rubberband together ends keep aligned glue two longerons together time Being sep arate will easier bend curvature fuselage want flexible until tail complete Assemble Formers 2 3 4 5 6 around engine bearers tank bottom Add / sq longeron between Formers 2 6 let overhang Former 2so will support Former 1 later bottom longeron goes long piece back tail timefor alignment pur poses Add Formers 7 through 11 Tackglue place Hot Stuff favorite cyanoacrylate CyA glue CyA glues very useful allowing us build type fuselage internal crutches formerly required straightness during construction use CyA everything should have some hand seem using CyA more because really saves time Add Formers 12 through 18 Add rear top longeron Former 11 tail Tack place let stick out forward past Former 6 Sight down finished unit make sure have just built yourself big balsa banana have shame you rushed Break pieces loose reglue until get right straight should able bend top longeron down touch set Former 6 have everything straight Hot Stuff two side longerons together full length still like apply small fillet Titebond glue balsa joint just diehard May1985 29 Left Lightweight pilot Cpu uee eJecIIn ugats show up nicely inside large canopy Sign reminds judges model Spo should viewed distance Right Large canopy necessitates finished interior Panels match documentation suice text Seat bumps pieces small resistors diodes Hows example creativeness guess Install Former 1 shape engine bearers suit Start planking covering top side longeron piece t balsa approx 1 wide runs front Former 1 way end tail hobby shops now have long balsa ask Next install another 1-in balsa strip along bottom side longeron Hot Stuff former go point fuselage starts curving used -in-wide balsa strips sanded needed get good joint between pieces Hot Stuff works wonders type planking can really get job done fast want use larger pieces will have soak ammonia riibberband place until dry shape dry can trim size glue place Add cockpit floor plan intend finish area elected make canopy interior separate unit finished Ijust glued place glue wing hold-down blocks until wing saddle area com pleted front hold-down bolt can exchanged hole wood dowel arrangement desired would suggest decide what type pushrods intend use can install before planking completed generally use Sullivan GoldN-Rods keep bending install 1/16-in music wire inside center section also helps assure fairly straight run down fuselage Keep music wire about t end make room threaded connectors Make sure anchor Gold-N-Rods formers about 4 keep bending under loads major cause trim changes Before rear planking finished cut out Formers Ri through R5 build vertical fin place Attach another -in balsa strip between top fin Former 11for alignment during final gluing assembly Sand formers good fit leading trailing edge Add planking make smooth joint between fin fuselage planking use resin/microbalboons fillets type Cm strake can either added now later oonvenience rudder assembly made joining perimeter members adding 3/32 balsa pieces between ribs Sand con tour glue set plank 1/16 balsa 7 p Lelt fliS View UflOWB mu uuu6d strake front stabilizer small stabilizer P15165 tne veriicai Tin nigni microballOOns/resin mix 1/64-in plywood base Note flaps extend under wing fillets fUII-uILO plane 30 Model Aviation AUTflO ana ins i uguna unuppag nithe Mint Julep Meet Model did reasonablyweil its first year qualifying compete US Scale Masters held Kansas City MO installation Rhom Air retracts typi cal foam-type wing Landing gear legs 5/32-in music wire covered vari ous parts Robart P-Si gear legs Fliea sanaca ana poiisnea Lucite used wing tip lights tail lights really work being powered nina-volt battery Nice detailing pays off NO OCR TEXT good time cut out stab ribs build stab assembly over plan shown place music wire elevator stiffener shown purchased pre formed Sig connector nylon horn already attached center takes little work use method hides elevator horn within fuselage effort will appreciated later model has completed have built stab elevator set aside until have finished wing Wing Cut out center section tip templates ood have wire foam cutter ask around area someone can help almost sure find someone can cut ask can help youll want get some experience done may wnt make own cutter someday person also will know get required foam can find anyone help companies have advertised magazine offering custom foam cut ting furnish templates money After foam oores posses sion add leading trailing edges Mark accurate centerline through tip front back will use later alignment Make necessary cutouts aile ron bellcrank assemblies make cutouts retract gear assembligs install aileron pushrods make two long parallel cuts t remove foam between Install Gold-NRods glue place Reinstall foam using Titebond glue foam can reused because little pieces forget install soft piece -in balsa Sand flush top foam core glue 3-in sheets 1/16 balsa together form sheet large enough cover side core piece apply balsa skins prefer use Dave Brown Products Southern Sorgum waterbased contact-type adhesive sheet ing careful twist warp core Also sure block up tips wing proper amount washout Vhen adhesive ready set core straight surface Lay sheet balsa core lightly start rubbing sheet oore randomly should happen attach rear trailing edge tip attach leading edge root section oould end up instant warp Before start visualize line running proportionally down core root tip Gently rub fingertips palm down line pro gress toward trailing edge time moving proportionally down core same forward leading edge should end up very straight wing Now can rub down hard using same technique final bond oore same other side method lets put accurate amount washout tip nothing tapered shim tip root under trailing edge two cores complete can joined together 5-mm epoxy would like explain Ijoin wing halves together ensure form true wing straight-flying aircraft building Pattern models learned wing tips must perfectly aligned can get Most kit instructions tell builder align center sections glue point should done because foam cores cut straight root tip joined checking may end up very large propeller-type twisted wing will track wings level through looping maneuver Since wing tips much work during various maneuvers seems tips panel must well aligned j Id N. t5 Ti tart alignment process making centerline tips foam cores Glue piece -in-wide balsa under line dont already have go hardware store purchase two 6-in bubble levels match flat surface sure read same Block up wing tips flat table place level balsa strip tips Keep shimming wing tip until bubbles exactly seine tips alignment may find center sections dont match dont worry about this joint will hidden inside fuselage have seen cores did match center much mbled way Yet finished model flew correctly center joint gluing has cured apply 4-in-wide piece heavy-duty fiberglass along top bottom 32 Model Aviation canopy occupying much fuselage depth still plenty room under servos receiver air tank gearall accessible maintenance Full-Size Plans Available. See Page 172 I1 I-I-Il ~-II L1h~ L / I— L -P ________________II T, 7.II ---S,--_A____ _____________ ____/ ______1__ U 03/3-nw. 3 3 0I23458 1583. EM-5IZ Tucio 1~ 00/ /I /C I3-0fl 1. centerline joint find best use finishing resin application Cut aileron flap parts sheet balsa Sand size rough contour mount wing favorite binges Final-sand ailerons flaps good fit trailing edge Add balsa wing tips final-sand finishing Cover edges retract gent cutouts 1/64 plywood held place 5mm epoxy material forms around wheel circle very easily work grain Add epoxy install nextlarger-size wheel have sitting around wing complete cut sand wing saddles good fit Make sure wing angled correctly shown plans Measure wing tip top vertical fin check wing square fuselage generally use 1/64 plywood base wing fillet add balsa scraps resin/microbal loons finish Install wing hold-down blocks epoxy drill tap assembly wing fuselage Add balsa triangle reinforcing top hold-down blocks additional sup port Cut opening rear fin stabilizer Cut sand fuselage sheeting can align stab wing fin Take time block up fuselage double-measure assure true alignment between wing fin stab Later youll glad took time get right Glue stab place add appropriate resin/microballoon fillets Reinstall fin pieces after elevator hinged stab Install rudder vertical fin basic building assembly oomplete install engine/muffler com bination Most current expansiontype mufflers will fit outside cowl Later installed aDu-Bro Muffle-aire cleaner look nearly quiet expansion-type thats consideration depending upon fly alas contest judges will downgrade muffler showing Add retract gear fuel tank battery preliminary balance check center gravity CG point shown plans model tail-heavy posi tion servos will help offset problem Most battery packs will fit between Formers 6 7 add about ead nose Tucano make balance properly particular model has fairly heavy finish yet weighs 11 lb ready flynot bad considering size model second attempt nearing completion May1985 33 V/ -- 7OOC tN j2 _____I// I-11 _________4 I 2I______________ fjC. written weighing 10 lb no ballast up front Cowl first attempt making fiberglass cowl Once got started really went easy Just remember doesnt look too neat until final sanding has completed Heres process used obtained Styrofoam block cut fit forward part fuselage betwen Formem 1 3 tack-glued place type foam sands easily careful go too fast Sand shape foam fit contoursand flush fuselage planking oomplete remove fuselage very carefully remove additional 1/16 over make up thickness fiberglass will applied Lay up medinm-weight fiberglass over form add finishing resin go used strips about i wide would mold easily around scoop area Let 34 Model Aviation L 5K I, -jj K i~ 12 High seating position full canopy provide visibility Tucano especially good fortralning pilots Models deviation scale isa more-forward nose gear strut Full-Size Plans Available. See Page 172 I II o0 0RI _I 4_____ ____ _____ _________7_ 0-.[v32][b-1-10-1-10]] __________ EMR-32 Tucano 0I2340 ncs first application cure sand rough spots 80-grit paper Cover another layer cloth/resin additional layers until thickness want achieved cowl about 1/16 thick though thicker needs Sand final shape finish Cut gouge out foam shell Add several coats primer fiberglass cowl Lat er can cut air intakes out add other openings glow plug ex haust required very small cutout will needed clear nose gear strut Heated exhaust air will exit through nose gear area Canopy As cowl no canopy can buy model learn form clear plastic material first looked clear plastic object could effort save myself going though big ordeal making canopy After realized no other choice studied problem awhile found particular can opy design relatively easy make because compound curving very slight can make canopy use vacuum-form After reviewing several methods mak ing canopy mold decided just build part fuselage cut loose later use made Formers 6 through 10 full-size planked canopy area time planking rest fuselage tack-glued some alsa pieces along top canopy floor put braces side-to-side former cut through formers along line before completing planking plan right can cut canopy area loose separate unit after sanding filling complete unit plenty strong purpose hot plastic does require lot pressure Make surface smooth can Any bumps seams planking will show up finished canopy applied two separate heavy coats finishing resin sanded unit smooth finishing 400-grit wet sandpaper 0000 steel wool Balsa USA sells plastic canopy material foot low oost Buy enough about three canopies spoil wont have reorder wait arrive Besides once youve completed project will find other things youll want form tacked plastic two pieces hardwood about 1 sq length plastic Place small tacks about apart keep plastic straight staples did hold wood well enough Cut plastic about 3 longer canopy about oven width Arrange form close oven some object will let hands go down over sides form Set oven 450g Mine electric really dont know will work gas May1985 35 1 A_ _U A- St5 F N1-Z Tc&~ oven think out before begin want burn up able finish project Put some gloves protect hands hold plastic wood edges place oven far will go actually heated end awhile switched ends plastic did go way oven plastic will start sag gets hot critical stage will see start smoke little sags andyouwillwant take out Dont Its notready yet Wait until sags about i its hot enough make transfer oven mold cooling off too much ready move mold push plastic stralght down over mold Run hand over sides form will see plastic go right over shape slick whistle Hold position about 30 secuntil plastic cools get plastic hot enough will stretch over mold tried four times before did right Just reheat plastic oven again success air suggest make another will have spare case future accidents paint spills what ever Stand back admire handi work youre like youll glad gave try FinIshing generally use finishing resin appropriate paint first apply oz fiberglass cloth wood resin brushed soldering acid-type brush hard bristles allows brush resin through cloth apply enough resin fill cloth form hard shell wood Excess use such several coats material unneces sary will add weight require much sanding Sand resin 80-grit paper remove lumps bumps Next apply several heavy coats primer dry sand 220-grit paper until final smoothness achieved have good finish coat will needed Sand lightly again Dont pile primer covers model like coat plaster trying level fill grain Primer weighs bunch thats especially harmful way back tail area used K&B white epoxy base coat applied spraying After dry covered model completely Fliteglas Liquid Masking Film great stuff dry can draw designs top felt-tip pen pencil drawing complete cut design lines sharp X-Acto blade lift off portion want color next color has applied has dried reapply LMF over new paint proceed same other colors lettering small insignias Continued page 138 36 Model Aviation Full-Size Plans Available. See Page 172 Tucano afloat few modern aircraft using propeller tricycle gearthat suit able dupiication modei form Great takeoffs andingsmuch iike Pattern ship 1* PLANS * TARBGbY 7 cially Turn-around thin 850 sq in. 120 cycle powered Ron Chidgey design templates computer plotted smooth solid performer Rib Plans construction hints $1 195 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics Its predecess ors Plans construction hInts WELLER 3 BLADE FIBERGLASS PROP proven lh hats Interna tIonal competition 1310 $2000 IVANS MAGIC GADGET protractor device used Ivan Krlatensen accurately measure aileron elevator add rudder throw Takes guess work out trimmIng Out airplane qualIty tool complete Instructions log book carrying case $795 SEE YOUR DEALER OR ORuaK UIRtLI lieve March 1937 plane Frank Tinsley think Loire French gull-wing parasol fightershown rear top quarter climbed toward title have first-issue covers framed am missing father thanks mother thanks thank you. Bill Winter 4432 Altura Ct Fafrfax VA 22030 Editor Bill Winter has granted leave absence producing col unin period time presently determined meantime have hand couple other articles Bill will printed next few months Before anyone jumps wrong conclu sion let make plain hasnt fired arent unhappy him isnt unhappy us let urge readers refrain writing Bill editorial offices about quick resumption Fun column would WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slipfit phenolic sockets build wing structure Now size models 718 die x 3 5 1* die x 2 5 1$ die x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 00s wIth 1ThW reaL bearing Both SLEEVE PULLER 0795for BEARING PULLER -15$1395 TRANSMITTER CASE An ineepensive rugged molded case protect expensIve transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1695 Qator WC Products 3713 PolapaflO Drive P Paniacola FL 3251$ Phone 90$ $76- 8639 INCLUVE $100 PER ITEM FOR UPS counterproductive rl R Wheeley Tucano/Naber Continued page 36 model cut out LMF painted small brush Using method can get correct scale stars bars etc have use closest-available size decals dont need seal painted-on items coat clear decals have mix special color remember keep small amount touch-ups probably will neces sary later Flying past building flying experiences guess have flown ofjust about popular model avail able Yet initial takeoff newly-completed model always have first flight jitters time no different engine running ship sitting end McDonnell-Douglas clubs asphalt run way time comes have advanced throttle power aircraft ran true down runway actually made nice slow takeoff itself due too much up-eleva tor trim After Tucano climbed flight altitude necessary trim abit down-elevator flew model around about six laps field prepared first landing lowered retract gear added about 25% flaps new model like limit first flight takeoff landing know handles well crucial areas nerves relax little can turn attention various other maneuvers following flights Tucano landed just like Curare Pattern airplane say least quite impressed what developed subsequent flights found due basic long moment arrangement flies smoothly nearly responsively Pattern airplane Landings flat true no tendency drop wing tip extremely low landing speeds first three Sport Scale contests entered Tucano static points right up other top models Everyone has seen fly tells impressed Tucano s looks air What could modeler want Buy big bag balsaand happy building Radio Technique/Myers Continued page 39 als Heath catalog changes time time dont hold against product has discontinued Specifically Radio Telephone oper ators license pilot has con fers license use Aviation Band 109135 MHz does permit use Amateur Radio bands George M Myers 70 Froehlich Farm Rd. Hicksville NY 11801 138 ModelAviation . CW f oo Designed Turnaround Pattern 3de~1 dd ~0O O~Gte le5 tB &MODEL AIRCRAFT 9$~ ex w P0 Box 1902 Greenville TX 75401 2144546441 GONTIOLIKI ThU PROFILE0COMBA 7RA T WIDE & NARROW WEDGE 1 5 6 oz Capacities UNIFLOW & STINDD Custom lieu Fuels Ingredients detailed bochur5OC stomps/check CAROLINATAFFINDER 8345 Delhi Road Charleston Hats. SC 29418 3563-7169
Edition: Model Aviation - 1985/05
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 138
The prototype unique two-place turboprop military trainer produced Brazil Ourauthors66-in-span RCSport Scale version 75 engine flies smoothly nearly responsively good Pattern airplane EJoseph R Naber AS MOST model builders inclined sitting work room waiting last coat paint dry latest creation started wonder what should work next Having built previous Scale models tail draggers decided time find suitable subject tricycle gear setup thought would give aging fin gers little help during takeoff landing proce dures may have noticed too noncivilian aircraft around days have tricycle gear also prop-driven thorough review aircraft nth able througn aero uthor learne ri mu abouth linethe books did nothing help matteruntil picked up then-current issue Aircraft International magazine ad Brazilian EMB-31 2 Tucano twin-seat turboprop trainer minute saw photo knew features aircraft wanted build model form wrote sales office listed England several weeks later kind enough send very detailed brochure pictures three-view draw ings After reviewing litera ture knew instantly made right choice EMB-31 2Tucano built EMBRAER Company Brazil designated T 27 Brazilian Air Force tandem-seat trainer pow ered Pratt Whitney PT6A-25C free turbine engine developing 750 static hp driving three-bladed Hartzell propeller Maximum speed 253 knots 291 mph unique incorporating Martin-Baker ejection seats although trainer one-piece canopy hinges side easy entry exit aircraft stressed plus six minus three gravities allowing perform com plete range aerobatic ma neuvers Tucano now being used Brazilian Air Force flight demonstration team very exte tide Tucano January 1983 issue ternational magazine Number 1 last repor copies issue wu able fora accepte Brazil trying sell aircraft other countriesand has sold some Egypt near future should seeing some varied paint schemes modeling use above information developed model plans using projector enlarge three-views size needed influenced several kit models recently built having larger 60 engines wingspans 60 found models flew much nicer models heavier wing loadings used build After examining several wingspan power plant combinations settled 90 engine 68-in wingspan As model developed began feel 90 engine would too powerful changed 75 cu Supertigre has proved very effective has served quite well also know now good 60 engine has plenty power fly aircraftdue models lightness its size its aerodynamically clean configuration proceeded draw up plans adding formers other details required After several preliminary sketches shuffling pieces arrived final setup thought wanted amazing much time can spend deciding several assembly methods use what will give best results efficient use materials simple things take timelike should wing bolted front should dowel-and-hole arrange ment used Consideration radio gear wing construction various other items come play during choice pro cess Ultimately what enjoyable get use construction methods comfortable use materials suit building tech niques best deviation scale make model location nose gear strut Because inverted engine move rearward however nearly noticeable side-mounted-engine alternative would cylinder sticking out breeze elected have retracting landing gear flaps also decided install bomb dropping mechanisms wing pylons however shown plans Construction text written see tightly-cowled engine tur bo exhaust stacks hand-flied alumi num nose gear mounted landing light assumption have varied know ledge building techniques have some familiarity ideas materials used model past square fuselage type model may have trouble aspect unless have some experienced friends can help out hasnt tried build model before knew everything about what doing As matter fact did very thing project learn After reading article through will see will have learn form clear plastic canopy make fiberglass cowl Making items prototype model first time both worked out quite well After reading made canopy mold decide yours same way must adjust cutting fuselage formers include uppermost part formers correct outline canopy shown must make allowance thickness balsa sheeting Len oupenigre uu engine iiueu wuit ier Fiberglass exhaust stacks open engine area allow nested air escape Right Velcro strips hold dummy gas tank wing pylon Music wire pins front rear Velcro assure tank alignment 28 Model Aviation Weii-baianced layout turboprop design makes easy see wny seversi mla-ast countries buying Brazilian Tucano torthelrtralning programs Photos bythe author engine cooling Inlet very effective air goes directly over engines cylin der head Note small hole feed carb NASA scoop glow plug access Fuselage Start cutting out form ers Use medium weight balsa throughout leave heavy stuff hobby shop next guys slab-sided fuselage tail moment long lightness tail area will pay big dividends lessening amount ballast may need nose Formers 1 2 3 4 must reviewed altered necessary suit engine bearer spacing needed particular engine made bearers little oversize could trim suit later time Former 1 must also sized time fit spinner will use use balsa fuel tank com partment floor feel member helps absorb forces forward-mount ed nose landing gear box Use retract gear other type shownwill necessi tate some revision formers mounting box Keep front gear box least Ys engine cylinder proper airflow inside cowling Again adjust fit particular engine muffler Model all-balsa resin base finish Final finish K&B Superpoxy de tailing done use Liquid Masking Film Text detaiisthis quick easytrimming system side view plans note show alsa longerons top bottom fuselage omis sion clarity formers show cuts pieces Before assembly begins mark rear formers pen about de edges After fuselage together almost completely planked can use outline hollow out centers formers lightness after planking completed inner strengthweightis needed Splice /4 sq balsa pieces make correct number longerons will go end fuselage other Glue two /4 sq longerons side Formers 4 5 clamp rubberband together ends keep aligned glue two longerons together time Being sep arate will easier bend curvature fuselage want flexible until tail complete Assemble Formers 2 3 4 5 6 around engine bearers tank bottom Add / sq longeron between Formers 2 6 let overhang Former 2so will support Former 1 later bottom longeron goes long piece back tail timefor alignment pur poses Add Formers 7 through 11 Tackglue place Hot Stuff favorite cyanoacrylate CyA glue CyA glues very useful allowing us build type fuselage internal crutches formerly required straightness during construction use CyA everything should have some hand seem using CyA more because really saves time Add Formers 12 through 18 Add rear top longeron Former 11 tail Tack place let stick out forward past Former 6 Sight down finished unit make sure have just built yourself big balsa banana have shame you rushed Break pieces loose reglue until get right straight should able bend top longeron down touch set Former 6 have everything straight Hot Stuff two side longerons together full length still like apply small fillet Titebond glue balsa joint just diehard May1985 29 Left Lightweight pilot Cpu uee eJecIIn ugats show up nicely inside large canopy Sign reminds judges model Spo should viewed distance Right Large canopy necessitates finished interior Panels match documentation suice text Seat bumps pieces small resistors diodes Hows example creativeness guess Install Former 1 shape engine bearers suit Start planking covering top side longeron piece t balsa approx 1 wide runs front Former 1 way end tail hobby shops now have long balsa ask Next install another 1-in balsa strip along bottom side longeron Hot Stuff former go point fuselage starts curving used -in-wide balsa strips sanded needed get good joint between pieces Hot Stuff works wonders type planking can really get job done fast want use larger pieces will have soak ammonia riibberband place until dry shape dry can trim size glue place Add cockpit floor plan intend finish area elected make canopy interior separate unit finished Ijust glued place glue wing hold-down blocks until wing saddle area com pleted front hold-down bolt can exchanged hole wood dowel arrangement desired would suggest decide what type pushrods intend use can install before planking completed generally use Sullivan GoldN-Rods keep bending install 1/16-in music wire inside center section also helps assure fairly straight run down fuselage Keep music wire about t end make room threaded connectors Make sure anchor Gold-N-Rods formers about 4 keep bending under loads major cause trim changes Before rear planking finished cut out Formers Ri through R5 build vertical fin place Attach another -in balsa strip between top fin Former 11for alignment during final gluing assembly Sand formers good fit leading trailing edge Add planking make smooth joint between fin fuselage planking use resin/microbalboons fillets type Cm strake can either added now later oonvenience rudder assembly made joining perimeter members adding 3/32 balsa pieces between ribs Sand con tour glue set plank 1/16 balsa 7 p Lelt fliS View UflOWB mu uuu6d strake front stabilizer small stabilizer P15165 tne veriicai Tin nigni microballOOns/resin mix 1/64-in plywood base Note flaps extend under wing fillets fUII-uILO plane 30 Model Aviation AUTflO ana ins i uguna unuppag nithe Mint Julep Meet Model did reasonablyweil its first year qualifying compete US Scale Masters held Kansas City MO installation Rhom Air retracts typi cal foam-type wing Landing gear legs 5/32-in music wire covered vari ous parts Robart P-Si gear legs Fliea sanaca ana poiisnea Lucite used wing tip lights tail lights really work being powered nina-volt battery Nice detailing pays off NO OCR TEXT good time cut out stab ribs build stab assembly over plan shown place music wire elevator stiffener shown purchased pre formed Sig connector nylon horn already attached center takes little work use method hides elevator horn within fuselage effort will appreciated later model has completed have built stab elevator set aside until have finished wing Wing Cut out center section tip templates ood have wire foam cutter ask around area someone can help almost sure find someone can cut ask can help youll want get some experience done may wnt make own cutter someday person also will know get required foam can find anyone help companies have advertised magazine offering custom foam cut ting furnish templates money After foam oores posses sion add leading trailing edges Mark accurate centerline through tip front back will use later alignment Make necessary cutouts aile ron bellcrank assemblies make cutouts retract gear assembligs install aileron pushrods make two long parallel cuts t remove foam between Install Gold-NRods glue place Reinstall foam using Titebond glue foam can reused because little pieces forget install soft piece -in balsa Sand flush top foam core glue 3-in sheets 1/16 balsa together form sheet large enough cover side core piece apply balsa skins prefer use Dave Brown Products Southern Sorgum waterbased contact-type adhesive sheet ing careful twist warp core Also sure block up tips wing proper amount washout Vhen adhesive ready set core straight surface Lay sheet balsa core lightly start rubbing sheet oore randomly should happen attach rear trailing edge tip attach leading edge root section oould end up instant warp Before start visualize line running proportionally down core root tip Gently rub fingertips palm down line pro gress toward trailing edge time moving proportionally down core same forward leading edge should end up very straight wing Now can rub down hard using same technique final bond oore same other side method lets put accurate amount washout tip nothing tapered shim tip root under trailing edge two cores complete can joined together 5-mm epoxy would like explain Ijoin wing halves together ensure form true wing straight-flying aircraft building Pattern models learned wing tips must perfectly aligned can get Most kit instructions tell builder align center sections glue point should done because foam cores cut straight root tip joined checking may end up very large propeller-type twisted wing will track wings level through looping maneuver Since wing tips much work during various maneuvers seems tips panel must well aligned j Id N. t5 Ti tart alignment process making centerline tips foam cores Glue piece -in-wide balsa under line dont already have go hardware store purchase two 6-in bubble levels match flat surface sure read same Block up wing tips flat table place level balsa strip tips Keep shimming wing tip until bubbles exactly seine tips alignment may find center sections dont match dont worry about this joint will hidden inside fuselage have seen cores did match center much mbled way Yet finished model flew correctly center joint gluing has cured apply 4-in-wide piece heavy-duty fiberglass along top bottom 32 Model Aviation canopy occupying much fuselage depth still plenty room under servos receiver air tank gearall accessible maintenance Full-Size Plans Available. See Page 172 I1 I-I-Il ~-II L1h~ L / I— L -P ________________II T, 7.II ---S,--_A____ _____________ ____/ ______1__ U 03/3-nw. 3 3 0I23458 1583. EM-5IZ Tucio 1~ 00/ /I /C I3-0fl 1. centerline joint find best use finishing resin application Cut aileron flap parts sheet balsa Sand size rough contour mount wing favorite binges Final-sand ailerons flaps good fit trailing edge Add balsa wing tips final-sand finishing Cover edges retract gent cutouts 1/64 plywood held place 5mm epoxy material forms around wheel circle very easily work grain Add epoxy install nextlarger-size wheel have sitting around wing complete cut sand wing saddles good fit Make sure wing angled correctly shown plans Measure wing tip top vertical fin check wing square fuselage generally use 1/64 plywood base wing fillet add balsa scraps resin/microbal loons finish Install wing hold-down blocks epoxy drill tap assembly wing fuselage Add balsa triangle reinforcing top hold-down blocks additional sup port Cut opening rear fin stabilizer Cut sand fuselage sheeting can align stab wing fin Take time block up fuselage double-measure assure true alignment between wing fin stab Later youll glad took time get right Glue stab place add appropriate resin/microballoon fillets Reinstall fin pieces after elevator hinged stab Install rudder vertical fin basic building assembly oomplete install engine/muffler com bination Most current expansiontype mufflers will fit outside cowl Later installed aDu-Bro Muffle-aire cleaner look nearly quiet expansion-type thats consideration depending upon fly alas contest judges will downgrade muffler showing Add retract gear fuel tank battery preliminary balance check center gravity CG point shown plans model tail-heavy posi tion servos will help offset problem Most battery packs will fit between Formers 6 7 add about ead nose Tucano make balance properly particular model has fairly heavy finish yet weighs 11 lb ready flynot bad considering size model second attempt nearing completion May1985 33 V/ -- 7OOC tN j2 _____I// I-11 _________4 I 2I______________ fjC. written weighing 10 lb no ballast up front Cowl first attempt making fiberglass cowl Once got started really went easy Just remember doesnt look too neat until final sanding has completed Heres process used obtained Styrofoam block cut fit forward part fuselage betwen Formem 1 3 tack-glued place type foam sands easily careful go too fast Sand shape foam fit contoursand flush fuselage planking oomplete remove fuselage very carefully remove additional 1/16 over make up thickness fiberglass will applied Lay up medinm-weight fiberglass over form add finishing resin go used strips about i wide would mold easily around scoop area Let 34 Model Aviation L 5K I, -jj K i~ 12 High seating position full canopy provide visibility Tucano especially good fortralning pilots Models deviation scale isa more-forward nose gear strut Full-Size Plans Available. See Page 172 I II o0 0RI _I 4_____ ____ _____ _________7_ 0-.[v32][b-1-10-1-10]] __________ EMR-32 Tucano 0I2340 ncs first application cure sand rough spots 80-grit paper Cover another layer cloth/resin additional layers until thickness want achieved cowl about 1/16 thick though thicker needs Sand final shape finish Cut gouge out foam shell Add several coats primer fiberglass cowl Lat er can cut air intakes out add other openings glow plug ex haust required very small cutout will needed clear nose gear strut Heated exhaust air will exit through nose gear area Canopy As cowl no canopy can buy model learn form clear plastic material first looked clear plastic object could effort save myself going though big ordeal making canopy After realized no other choice studied problem awhile found particular can opy design relatively easy make because compound curving very slight can make canopy use vacuum-form After reviewing several methods mak ing canopy mold decided just build part fuselage cut loose later use made Formers 6 through 10 full-size planked canopy area time planking rest fuselage tack-glued some alsa pieces along top canopy floor put braces side-to-side former cut through formers along line before completing planking plan right can cut canopy area loose separate unit after sanding filling complete unit plenty strong purpose hot plastic does require lot pressure Make surface smooth can Any bumps seams planking will show up finished canopy applied two separate heavy coats finishing resin sanded unit smooth finishing 400-grit wet sandpaper 0000 steel wool Balsa USA sells plastic canopy material foot low oost Buy enough about three canopies spoil wont have reorder wait arrive Besides once youve completed project will find other things youll want form tacked plastic two pieces hardwood about 1 sq length plastic Place small tacks about apart keep plastic straight staples did hold wood well enough Cut plastic about 3 longer canopy about oven width Arrange form close oven some object will let hands go down over sides form Set oven 450g Mine electric really dont know will work gas May1985 35 1 A_ _U A- St5 F N1-Z Tc&~ oven think out before begin want burn up able finish project Put some gloves protect hands hold plastic wood edges place oven far will go actually heated end awhile switched ends plastic did go way oven plastic will start sag gets hot critical stage will see start smoke little sags andyouwillwant take out Dont Its notready yet Wait until sags about i its hot enough make transfer oven mold cooling off too much ready move mold push plastic stralght down over mold Run hand over sides form will see plastic go right over shape slick whistle Hold position about 30 secuntil plastic cools get plastic hot enough will stretch over mold tried four times before did right Just reheat plastic oven again success air suggest make another will have spare case future accidents paint spills what ever Stand back admire handi work youre like youll glad gave try FinIshing generally use finishing resin appropriate paint first apply oz fiberglass cloth wood resin brushed soldering acid-type brush hard bristles allows brush resin through cloth apply enough resin fill cloth form hard shell wood Excess use such several coats material unneces sary will add weight require much sanding Sand resin 80-grit paper remove lumps bumps Next apply several heavy coats primer dry sand 220-grit paper until final smoothness achieved have good finish coat will needed Sand lightly again Dont pile primer covers model like coat plaster trying level fill grain Primer weighs bunch thats especially harmful way back tail area used K&B white epoxy base coat applied spraying After dry covered model completely Fliteglas Liquid Masking Film great stuff dry can draw designs top felt-tip pen pencil drawing complete cut design lines sharp X-Acto blade lift off portion want color next color has applied has dried reapply LMF over new paint proceed same other colors lettering small insignias Continued page 138 36 Model Aviation Full-Size Plans Available. See Page 172 Tucano afloat few modern aircraft using propeller tricycle gearthat suit able dupiication modei form Great takeoffs andingsmuch iike Pattern ship 1* PLANS * TARBGbY 7 cially Turn-around thin 850 sq in. 120 cycle powered Ron Chidgey design templates computer plotted smooth solid performer Rib Plans construction hints $1 195 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics Its predecess ors Plans construction hInts WELLER 3 BLADE FIBERGLASS PROP proven lh hats Interna tIonal competition 1310 $2000 IVANS MAGIC GADGET protractor device used Ivan Krlatensen accurately measure aileron elevator add rudder throw Takes guess work out trimmIng Out airplane qualIty tool complete Instructions log book carrying case $795 SEE YOUR DEALER OR ORuaK UIRtLI lieve March 1937 plane Frank Tinsley think Loire French gull-wing parasol fightershown rear top quarter climbed toward title have first-issue covers framed am missing father thanks mother thanks thank you. Bill Winter 4432 Altura Ct Fafrfax VA 22030 Editor Bill Winter has granted leave absence producing col unin period time presently determined meantime have hand couple other articles Bill will printed next few months Before anyone jumps wrong conclu sion let make plain hasnt fired arent unhappy him isnt unhappy us let urge readers refrain writing Bill editorial offices about quick resumption Fun column would WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slipfit phenolic sockets build wing structure Now size models 718 die x 3 5 1* die x 2 5 1$ die x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 00s wIth 1ThW reaL bearing Both SLEEVE PULLER 0795for BEARING PULLER -15$1395 TRANSMITTER CASE An ineepensive rugged molded case protect expensIve transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1695 Qator WC Products 3713 PolapaflO Drive P Paniacola FL 3251$ Phone 90$ $76- 8639 INCLUVE $100 PER ITEM FOR UPS counterproductive rl R Wheeley Tucano/Naber Continued page 36 model cut out LMF painted small brush Using method can get correct scale stars bars etc have use closest-available size decals dont need seal painted-on items coat clear decals have mix special color remember keep small amount touch-ups probably will neces sary later Flying past building flying experiences guess have flown ofjust about popular model avail able Yet initial takeoff newly-completed model always have first flight jitters time no different engine running ship sitting end McDonnell-Douglas clubs asphalt run way time comes have advanced throttle power aircraft ran true down runway actually made nice slow takeoff itself due too much up-eleva tor trim After Tucano climbed flight altitude necessary trim abit down-elevator flew model around about six laps field prepared first landing lowered retract gear added about 25% flaps new model like limit first flight takeoff landing know handles well crucial areas nerves relax little can turn attention various other maneuvers following flights Tucano landed just like Curare Pattern airplane say least quite impressed what developed subsequent flights found due basic long moment arrangement flies smoothly nearly responsively Pattern airplane Landings flat true no tendency drop wing tip extremely low landing speeds first three Sport Scale contests entered Tucano static points right up other top models Everyone has seen fly tells impressed Tucano s looks air What could modeler want Buy big bag balsaand happy building Radio Technique/Myers Continued page 39 als Heath catalog changes time time dont hold against product has discontinued Specifically Radio Telephone oper ators license pilot has con fers license use Aviation Band 109135 MHz does permit use Amateur Radio bands George M Myers 70 Froehlich Farm Rd. Hicksville NY 11801 138 ModelAviation . CW f oo Designed Turnaround Pattern 3de~1 dd ~0O O~Gte le5 tB &MODEL AIRCRAFT 9$~ ex w P0 Box 1902 Greenville TX 75401 2144546441 GONTIOLIKI ThU PROFILE0COMBA 7RA T WIDE & NARROW WEDGE 1 5 6 oz Capacities UNIFLOW & STINDD Custom lieu Fuels Ingredients detailed bochur5OC stomps/check CAROLINATAFFINDER 8345 Delhi Road Charleston Hats. SC 29418 3563-7169
Edition: Model Aviation - 1985/05
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 138
The prototype unique two-place turboprop military trainer produced Brazil Ourauthors66-in-span RCSport Scale version 75 engine flies smoothly nearly responsively good Pattern airplane EJoseph R Naber AS MOST model builders inclined sitting work room waiting last coat paint dry latest creation started wonder what should work next Having built previous Scale models tail draggers decided time find suitable subject tricycle gear setup thought would give aging fin gers little help during takeoff landing proce dures may have noticed too noncivilian aircraft around days have tricycle gear also prop-driven thorough review aircraft nth able througn aero uthor learne ri mu abouth linethe books did nothing help matteruntil picked up then-current issue Aircraft International magazine ad Brazilian EMB-31 2 Tucano twin-seat turboprop trainer minute saw photo knew features aircraft wanted build model form wrote sales office listed England several weeks later kind enough send very detailed brochure pictures three-view draw ings After reviewing litera ture knew instantly made right choice EMB-31 2Tucano built EMBRAER Company Brazil designated T 27 Brazilian Air Force tandem-seat trainer pow ered Pratt Whitney PT6A-25C free turbine engine developing 750 static hp driving three-bladed Hartzell propeller Maximum speed 253 knots 291 mph unique incorporating Martin-Baker ejection seats although trainer one-piece canopy hinges side easy entry exit aircraft stressed plus six minus three gravities allowing perform com plete range aerobatic ma neuvers Tucano now being used Brazilian Air Force flight demonstration team very exte tide Tucano January 1983 issue ternational magazine Number 1 last repor copies issue wu able fora accepte Brazil trying sell aircraft other countriesand has sold some Egypt near future should seeing some varied paint schemes modeling use above information developed model plans using projector enlarge three-views size needed influenced several kit models recently built having larger 60 engines wingspans 60 found models flew much nicer models heavier wing loadings used build After examining several wingspan power plant combinations settled 90 engine 68-in wingspan As model developed began feel 90 engine would too powerful changed 75 cu Supertigre has proved very effective has served quite well also know now good 60 engine has plenty power fly aircraftdue models lightness its size its aerodynamically clean configuration proceeded draw up plans adding formers other details required After several preliminary sketches shuffling pieces arrived final setup thought wanted amazing much time can spend deciding several assembly methods use what will give best results efficient use materials simple things take timelike should wing bolted front should dowel-and-hole arrange ment used Consideration radio gear wing construction various other items come play during choice pro cess Ultimately what enjoyable get use construction methods comfortable use materials suit building tech niques best deviation scale make model location nose gear strut Because inverted engine move rearward however nearly noticeable side-mounted-engine alternative would cylinder sticking out breeze elected have retracting landing gear flaps also decided install bomb dropping mechanisms wing pylons however shown plans Construction text written see tightly-cowled engine tur bo exhaust stacks hand-flied alumi num nose gear mounted landing light assumption have varied know ledge building techniques have some familiarity ideas materials used model past square fuselage type model may have trouble aspect unless have some experienced friends can help out hasnt tried build model before knew everything about what doing As matter fact did very thing project learn After reading article through will see will have learn form clear plastic canopy make fiberglass cowl Making items prototype model first time both worked out quite well After reading made canopy mold decide yours same way must adjust cutting fuselage formers include uppermost part formers correct outline canopy shown must make allowance thickness balsa sheeting Len oupenigre uu engine iiueu wuit ier Fiberglass exhaust stacks open engine area allow nested air escape Right Velcro strips hold dummy gas tank wing pylon Music wire pins front rear Velcro assure tank alignment 28 Model Aviation Weii-baianced layout turboprop design makes easy see wny seversi mla-ast countries buying Brazilian Tucano torthelrtralning programs Photos bythe author engine cooling Inlet very effective air goes directly over engines cylin der head Note small hole feed carb NASA scoop glow plug access Fuselage Start cutting out form ers Use medium weight balsa throughout leave heavy stuff hobby shop next guys slab-sided fuselage tail moment long lightness tail area will pay big dividends lessening amount ballast may need nose Formers 1 2 3 4 must reviewed altered necessary suit engine bearer spacing needed particular engine made bearers little oversize could trim suit later time Former 1 must also sized time fit spinner will use use balsa fuel tank com partment floor feel member helps absorb forces forward-mount ed nose landing gear box Use retract gear other type shownwill necessi tate some revision formers mounting box Keep front gear box least Ys engine cylinder proper airflow inside cowling Again adjust fit particular engine muffler Model all-balsa resin base finish Final finish K&B Superpoxy de tailing done use Liquid Masking Film Text detaiisthis quick easytrimming system side view plans note show alsa longerons top bottom fuselage omis sion clarity formers show cuts pieces Before assembly begins mark rear formers pen about de edges After fuselage together almost completely planked can use outline hollow out centers formers lightness after planking completed inner strengthweightis needed Splice /4 sq balsa pieces make correct number longerons will go end fuselage other Glue two /4 sq longerons side Formers 4 5 clamp rubberband together ends keep aligned glue two longerons together time Being sep arate will easier bend curvature fuselage want flexible until tail complete Assemble Formers 2 3 4 5 6 around engine bearers tank bottom Add / sq longeron between Formers 2 6 let overhang Former 2so will support Former 1 later bottom longeron goes long piece back tail timefor alignment pur poses Add Formers 7 through 11 Tackglue place Hot Stuff favorite cyanoacrylate CyA glue CyA glues very useful allowing us build type fuselage internal crutches formerly required straightness during construction use CyA everything should have some hand seem using CyA more because really saves time Add Formers 12 through 18 Add rear top longeron Former 11 tail Tack place let stick out forward past Former 6 Sight down finished unit make sure have just built yourself big balsa banana have shame you rushed Break pieces loose reglue until get right straight should able bend top longeron down touch set Former 6 have everything straight Hot Stuff two side longerons together full length still like apply small fillet Titebond glue balsa joint just diehard May1985 29 Left Lightweight pilot Cpu uee eJecIIn ugats show up nicely inside large canopy Sign reminds judges model Spo should viewed distance Right Large canopy necessitates finished interior Panels match documentation suice text Seat bumps pieces small resistors diodes Hows example creativeness guess Install Former 1 shape engine bearers suit Start planking covering top side longeron piece t balsa approx 1 wide runs front Former 1 way end tail hobby shops now have long balsa ask Next install another 1-in balsa strip along bottom side longeron Hot Stuff former go point fuselage starts curving used -in-wide balsa strips sanded needed get good joint between pieces Hot Stuff works wonders type planking can really get job done fast want use larger pieces will have soak ammonia riibberband place until dry shape dry can trim size glue place Add cockpit floor plan intend finish area elected make canopy interior separate unit finished Ijust glued place glue wing hold-down blocks until wing saddle area com pleted front hold-down bolt can exchanged hole wood dowel arrangement desired would suggest decide what type pushrods intend use can install before planking completed generally use Sullivan GoldN-Rods keep bending install 1/16-in music wire inside center section also helps assure fairly straight run down fuselage Keep music wire about t end make room threaded connectors Make sure anchor Gold-N-Rods formers about 4 keep bending under loads major cause trim changes Before rear planking finished cut out Formers Ri through R5 build vertical fin place Attach another -in balsa strip between top fin Former 11for alignment during final gluing assembly Sand formers good fit leading trailing edge Add planking make smooth joint between fin fuselage planking use resin/microbalboons fillets type Cm strake can either added now later oonvenience rudder assembly made joining perimeter members adding 3/32 balsa pieces between ribs Sand con tour glue set plank 1/16 balsa 7 p Lelt fliS View UflOWB mu uuu6d strake front stabilizer small stabilizer P15165 tne veriicai Tin nigni microballOOns/resin mix 1/64-in plywood base Note flaps extend under wing fillets fUII-uILO plane 30 Model Aviation AUTflO ana ins i uguna unuppag nithe Mint Julep Meet Model did reasonablyweil its first year qualifying compete US Scale Masters held Kansas City MO installation Rhom Air retracts typi cal foam-type wing Landing gear legs 5/32-in music wire covered vari ous parts Robart P-Si gear legs Fliea sanaca ana poiisnea Lucite used wing tip lights tail lights really work being powered nina-volt battery Nice detailing pays off NO OCR TEXT good time cut out stab ribs build stab assembly over plan shown place music wire elevator stiffener shown purchased pre formed Sig connector nylon horn already attached center takes little work use method hides elevator horn within fuselage effort will appreciated later model has completed have built stab elevator set aside until have finished wing Wing Cut out center section tip templates ood have wire foam cutter ask around area someone can help almost sure find someone can cut ask can help youll want get some experience done may wnt make own cutter someday person also will know get required foam can find anyone help companies have advertised magazine offering custom foam cut ting furnish templates money After foam oores posses sion add leading trailing edges Mark accurate centerline through tip front back will use later alignment Make necessary cutouts aile ron bellcrank assemblies make cutouts retract gear assembligs install aileron pushrods make two long parallel cuts t remove foam between Install Gold-NRods glue place Reinstall foam using Titebond glue foam can reused because little pieces forget install soft piece -in balsa Sand flush top foam core glue 3-in sheets 1/16 balsa together form sheet large enough cover side core piece apply balsa skins prefer use Dave Brown Products Southern Sorgum waterbased contact-type adhesive sheet ing careful twist warp core Also sure block up tips wing proper amount washout Vhen adhesive ready set core straight surface Lay sheet balsa core lightly start rubbing sheet oore randomly should happen attach rear trailing edge tip attach leading edge root section oould end up instant warp Before start visualize line running proportionally down core root tip Gently rub fingertips palm down line pro gress toward trailing edge time moving proportionally down core same forward leading edge should end up very straight wing Now can rub down hard using same technique final bond oore same other side method lets put accurate amount washout tip nothing tapered shim tip root under trailing edge two cores complete can joined together 5-mm epoxy would like explain Ijoin wing halves together ensure form true wing straight-flying aircraft building Pattern models learned wing tips must perfectly aligned can get Most kit instructions tell builder align center sections glue point should done because foam cores cut straight root tip joined checking may end up very large propeller-type twisted wing will track wings level through looping maneuver Since wing tips much work during various maneuvers seems tips panel must well aligned j Id N. t5 Ti tart alignment process making centerline tips foam cores Glue piece -in-wide balsa under line dont already have go hardware store purchase two 6-in bubble levels match flat surface sure read same Block up wing tips flat table place level balsa strip tips Keep shimming wing tip until bubbles exactly seine tips alignment may find center sections dont match dont worry about this joint will hidden inside fuselage have seen cores did match center much mbled way Yet finished model flew correctly center joint gluing has cured apply 4-in-wide piece heavy-duty fiberglass along top bottom 32 Model Aviation canopy occupying much fuselage depth still plenty room under servos receiver air tank gearall accessible maintenance Full-Size Plans Available. See Page 172 I1 I-I-Il ~-II L1h~ L / I— L -P ________________II T, 7.II ---S,--_A____ _____________ ____/ ______1__ U 03/3-nw. 3 3 0I23458 1583. EM-5IZ Tucio 1~ 00/ /I /C I3-0fl 1. centerline joint find best use finishing resin application Cut aileron flap parts sheet balsa Sand size rough contour mount wing favorite binges Final-sand ailerons flaps good fit trailing edge Add balsa wing tips final-sand finishing Cover edges retract gent cutouts 1/64 plywood held place 5mm epoxy material forms around wheel circle very easily work grain Add epoxy install nextlarger-size wheel have sitting around wing complete cut sand wing saddles good fit Make sure wing angled correctly shown plans Measure wing tip top vertical fin check wing square fuselage generally use 1/64 plywood base wing fillet add balsa scraps resin/microbal loons finish Install wing hold-down blocks epoxy drill tap assembly wing fuselage Add balsa triangle reinforcing top hold-down blocks additional sup port Cut opening rear fin stabilizer Cut sand fuselage sheeting can align stab wing fin Take time block up fuselage double-measure assure true alignment between wing fin stab Later youll glad took time get right Glue stab place add appropriate resin/microballoon fillets Reinstall fin pieces after elevator hinged stab Install rudder vertical fin basic building assembly oomplete install engine/muffler com bination Most current expansiontype mufflers will fit outside cowl Later installed aDu-Bro Muffle-aire cleaner look nearly quiet expansion-type thats consideration depending upon fly alas contest judges will downgrade muffler showing Add retract gear fuel tank battery preliminary balance check center gravity CG point shown plans model tail-heavy posi tion servos will help offset problem Most battery packs will fit between Formers 6 7 add about ead nose Tucano make balance properly particular model has fairly heavy finish yet weighs 11 lb ready flynot bad considering size model second attempt nearing completion May1985 33 V/ -- 7OOC tN j2 _____I// I-11 _________4 I 2I______________ fjC. written weighing 10 lb no ballast up front Cowl first attempt making fiberglass cowl Once got started really went easy Just remember doesnt look too neat until final sanding has completed Heres process used obtained Styrofoam block cut fit forward part fuselage betwen Formem 1 3 tack-glued place type foam sands easily careful go too fast Sand shape foam fit contoursand flush fuselage planking oomplete remove fuselage very carefully remove additional 1/16 over make up thickness fiberglass will applied Lay up medinm-weight fiberglass over form add finishing resin go used strips about i wide would mold easily around scoop area Let 34 Model Aviation L 5K I, -jj K i~ 12 High seating position full canopy provide visibility Tucano especially good fortralning pilots Models deviation scale isa more-forward nose gear strut Full-Size Plans Available. See Page 172 I II o0 0RI _I 4_____ ____ _____ _________7_ 0-.[v32][b-1-10-1-10]] __________ EMR-32 Tucano 0I2340 ncs first application cure sand rough spots 80-grit paper Cover another layer cloth/resin additional layers until thickness want achieved cowl about 1/16 thick though thicker needs Sand final shape finish Cut gouge out foam shell Add several coats primer fiberglass cowl Lat er can cut air intakes out add other openings glow plug ex haust required very small cutout will needed clear nose gear strut Heated exhaust air will exit through nose gear area Canopy As cowl no canopy can buy model learn form clear plastic material first looked clear plastic object could effort save myself going though big ordeal making canopy After realized no other choice studied problem awhile found particular can opy design relatively easy make because compound curving very slight can make canopy use vacuum-form After reviewing several methods mak ing canopy mold decided just build part fuselage cut loose later use made Formers 6 through 10 full-size planked canopy area time planking rest fuselage tack-glued some alsa pieces along top canopy floor put braces side-to-side former cut through formers along line before completing planking plan right can cut canopy area loose separate unit after sanding filling complete unit plenty strong purpose hot plastic does require lot pressure Make surface smooth can Any bumps seams planking will show up finished canopy applied two separate heavy coats finishing resin sanded unit smooth finishing 400-grit wet sandpaper 0000 steel wool Balsa USA sells plastic canopy material foot low oost Buy enough about three canopies spoil wont have reorder wait arrive Besides once youve completed project will find other things youll want form tacked plastic two pieces hardwood about 1 sq length plastic Place small tacks about apart keep plastic straight staples did hold wood well enough Cut plastic about 3 longer canopy about oven width Arrange form close oven some object will let hands go down over sides form Set oven 450g Mine electric really dont know will work gas May1985 35 1 A_ _U A- St5 F N1-Z Tc&~ oven think out before begin want burn up able finish project Put some gloves protect hands hold plastic wood edges place oven far will go actually heated end awhile switched ends plastic did go way oven plastic will start sag gets hot critical stage will see start smoke little sags andyouwillwant take out Dont Its notready yet Wait until sags about i its hot enough make transfer oven mold cooling off too much ready move mold push plastic stralght down over mold Run hand over sides form will see plastic go right over shape slick whistle Hold position about 30 secuntil plastic cools get plastic hot enough will stretch over mold tried four times before did right Just reheat plastic oven again success air suggest make another will have spare case future accidents paint spills what ever Stand back admire handi work youre like youll glad gave try FinIshing generally use finishing resin appropriate paint first apply oz fiberglass cloth wood resin brushed soldering acid-type brush hard bristles allows brush resin through cloth apply enough resin fill cloth form hard shell wood Excess use such several coats material unneces sary will add weight require much sanding Sand resin 80-grit paper remove lumps bumps Next apply several heavy coats primer dry sand 220-grit paper until final smoothness achieved have good finish coat will needed Sand lightly again Dont pile primer covers model like coat plaster trying level fill grain Primer weighs bunch thats especially harmful way back tail area used K&B white epoxy base coat applied spraying After dry covered model completely Fliteglas Liquid Masking Film great stuff dry can draw designs top felt-tip pen pencil drawing complete cut design lines sharp X-Acto blade lift off portion want color next color has applied has dried reapply LMF over new paint proceed same other colors lettering small insignias Continued page 138 36 Model Aviation Full-Size Plans Available. See Page 172 Tucano afloat few modern aircraft using propeller tricycle gearthat suit able dupiication modei form Great takeoffs andingsmuch iike Pattern ship 1* PLANS * TARBGbY 7 cially Turn-around thin 850 sq in. 120 cycle powered Ron Chidgey design templates computer plotted smooth solid performer Rib Plans construction hints $1 195 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics Its predecess ors Plans construction hInts WELLER 3 BLADE FIBERGLASS PROP proven lh hats Interna tIonal competition 1310 $2000 IVANS MAGIC GADGET protractor device used Ivan Krlatensen accurately measure aileron elevator add rudder throw Takes guess work out trimmIng Out airplane qualIty tool complete Instructions log book carrying case $795 SEE YOUR DEALER OR ORuaK UIRtLI lieve March 1937 plane Frank Tinsley think Loire French gull-wing parasol fightershown rear top quarter climbed toward title have first-issue covers framed am missing father thanks mother thanks thank you. Bill Winter 4432 Altura Ct Fafrfax VA 22030 Editor Bill Winter has granted leave absence producing col unin period time presently determined meantime have hand couple other articles Bill will printed next few months Before anyone jumps wrong conclu sion let make plain hasnt fired arent unhappy him isnt unhappy us let urge readers refrain writing Bill editorial offices about quick resumption Fun column would WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slipfit phenolic sockets build wing structure Now size models 718 die x 3 5 1* die x 2 5 1$ die x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 00s wIth 1ThW reaL bearing Both SLEEVE PULLER 0795for BEARING PULLER -15$1395 TRANSMITTER CASE An ineepensive rugged molded case protect expensIve transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1695 Qator WC Products 3713 PolapaflO Drive P Paniacola FL 3251$ Phone 90$ $76- 8639 INCLUVE $100 PER ITEM FOR UPS counterproductive rl R Wheeley Tucano/Naber Continued page 36 model cut out LMF painted small brush Using method can get correct scale stars bars etc have use closest-available size decals dont need seal painted-on items coat clear decals have mix special color remember keep small amount touch-ups probably will neces sary later Flying past building flying experiences guess have flown ofjust about popular model avail able Yet initial takeoff newly-completed model always have first flight jitters time no different engine running ship sitting end McDonnell-Douglas clubs asphalt run way time comes have advanced throttle power aircraft ran true down runway actually made nice slow takeoff itself due too much up-eleva tor trim After Tucano climbed flight altitude necessary trim abit down-elevator flew model around about six laps field prepared first landing lowered retract gear added about 25% flaps new model like limit first flight takeoff landing know handles well crucial areas nerves relax little can turn attention various other maneuvers following flights Tucano landed just like Curare Pattern airplane say least quite impressed what developed subsequent flights found due basic long moment arrangement flies smoothly nearly responsively Pattern airplane Landings flat true no tendency drop wing tip extremely low landing speeds first three Sport Scale contests entered Tucano static points right up other top models Everyone has seen fly tells impressed Tucano s looks air What could modeler want Buy big bag balsaand happy building Radio Technique/Myers Continued page 39 als Heath catalog changes time time dont hold against product has discontinued Specifically Radio Telephone oper ators license pilot has con fers license use Aviation Band 109135 MHz does permit use Amateur Radio bands George M Myers 70 Froehlich Farm Rd. Hicksville NY 11801 138 ModelAviation . CW f oo Designed Turnaround Pattern 3de~1 dd ~0O O~Gte le5 tB &MODEL AIRCRAFT 9$~ ex w P0 Box 1902 Greenville TX 75401 2144546441 GONTIOLIKI ThU PROFILE0COMBA 7RA T WIDE & NARROW WEDGE 1 5 6 oz Capacities UNIFLOW & STINDD Custom lieu Fuels Ingredients detailed bochur5OC stomps/check CAROLINATAFFINDER 8345 Delhi Road Charleston Hats. SC 29418 3563-7169
Edition: Model Aviation - 1985/05
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 138
The prototype unique two-place turboprop military trainer produced Brazil Ourauthors66-in-span RCSport Scale version 75 engine flies smoothly nearly responsively good Pattern airplane EJoseph R Naber AS MOST model builders inclined sitting work room waiting last coat paint dry latest creation started wonder what should work next Having built previous Scale models tail draggers decided time find suitable subject tricycle gear setup thought would give aging fin gers little help during takeoff landing proce dures may have noticed too noncivilian aircraft around days have tricycle gear also prop-driven thorough review aircraft nth able througn aero uthor learne ri mu abouth linethe books did nothing help matteruntil picked up then-current issue Aircraft International magazine ad Brazilian EMB-31 2 Tucano twin-seat turboprop trainer minute saw photo knew features aircraft wanted build model form wrote sales office listed England several weeks later kind enough send very detailed brochure pictures three-view draw ings After reviewing litera ture knew instantly made right choice EMB-31 2Tucano built EMBRAER Company Brazil designated T 27 Brazilian Air Force tandem-seat trainer pow ered Pratt Whitney PT6A-25C free turbine engine developing 750 static hp driving three-bladed Hartzell propeller Maximum speed 253 knots 291 mph unique incorporating Martin-Baker ejection seats although trainer one-piece canopy hinges side easy entry exit aircraft stressed plus six minus three gravities allowing perform com plete range aerobatic ma neuvers Tucano now being used Brazilian Air Force flight demonstration team very exte tide Tucano January 1983 issue ternational magazine Number 1 last repor copies issue wu able fora accepte Brazil trying sell aircraft other countriesand has sold some Egypt near future should seeing some varied paint schemes modeling use above information developed model plans using projector enlarge three-views size needed influenced several kit models recently built having larger 60 engines wingspans 60 found models flew much nicer models heavier wing loadings used build After examining several wingspan power plant combinations settled 90 engine 68-in wingspan As model developed began feel 90 engine would too powerful changed 75 cu Supertigre has proved very effective has served quite well also know now good 60 engine has plenty power fly aircraftdue models lightness its size its aerodynamically clean configuration proceeded draw up plans adding formers other details required After several preliminary sketches shuffling pieces arrived final setup thought wanted amazing much time can spend deciding several assembly methods use what will give best results efficient use materials simple things take timelike should wing bolted front should dowel-and-hole arrange ment used Consideration radio gear wing construction various other items come play during choice pro cess Ultimately what enjoyable get use construction methods comfortable use materials suit building tech niques best deviation scale make model location nose gear strut Because inverted engine move rearward however nearly noticeable side-mounted-engine alternative would cylinder sticking out breeze elected have retracting landing gear flaps also decided install bomb dropping mechanisms wing pylons however shown plans Construction text written see tightly-cowled engine tur bo exhaust stacks hand-flied alumi num nose gear mounted landing light assumption have varied know ledge building techniques have some familiarity ideas materials used model past square fuselage type model may have trouble aspect unless have some experienced friends can help out hasnt tried build model before knew everything about what doing As matter fact did very thing project learn After reading article through will see will have learn form clear plastic canopy make fiberglass cowl Making items prototype model first time both worked out quite well After reading made canopy mold decide yours same way must adjust cutting fuselage formers include uppermost part formers correct outline canopy shown must make allowance thickness balsa sheeting Len oupenigre uu engine iiueu wuit ier Fiberglass exhaust stacks open engine area allow nested air escape Right Velcro strips hold dummy gas tank wing pylon Music wire pins front rear Velcro assure tank alignment 28 Model Aviation Weii-baianced layout turboprop design makes easy see wny seversi mla-ast countries buying Brazilian Tucano torthelrtralning programs Photos bythe author engine cooling Inlet very effective air goes directly over engines cylin der head Note small hole feed carb NASA scoop glow plug access Fuselage Start cutting out form ers Use medium weight balsa throughout leave heavy stuff hobby shop next guys slab-sided fuselage tail moment long lightness tail area will pay big dividends lessening amount ballast may need nose Formers 1 2 3 4 must reviewed altered necessary suit engine bearer spacing needed particular engine made bearers little oversize could trim suit later time Former 1 must also sized time fit spinner will use use balsa fuel tank com partment floor feel member helps absorb forces forward-mount ed nose landing gear box Use retract gear other type shownwill necessi tate some revision formers mounting box Keep front gear box least Ys engine cylinder proper airflow inside cowling Again adjust fit particular engine muffler Model all-balsa resin base finish Final finish K&B Superpoxy de tailing done use Liquid Masking Film Text detaiisthis quick easytrimming system side view plans note show alsa longerons top bottom fuselage omis sion clarity formers show cuts pieces Before assembly begins mark rear formers pen about de edges After fuselage together almost completely planked can use outline hollow out centers formers lightness after planking completed inner strengthweightis needed Splice /4 sq balsa pieces make correct number longerons will go end fuselage other Glue two /4 sq longerons side Formers 4 5 clamp rubberband together ends keep aligned glue two longerons together time Being sep arate will easier bend curvature fuselage want flexible until tail complete Assemble Formers 2 3 4 5 6 around engine bearers tank bottom Add / sq longeron between Formers 2 6 let overhang Former 2so will support Former 1 later bottom longeron goes long piece back tail timefor alignment pur poses Add Formers 7 through 11 Tackglue place Hot Stuff favorite cyanoacrylate CyA glue CyA glues very useful allowing us build type fuselage internal crutches formerly required straightness during construction use CyA everything should have some hand seem using CyA more because really saves time Add Formers 12 through 18 Add rear top longeron Former 11 tail Tack place let stick out forward past Former 6 Sight down finished unit make sure have just built yourself big balsa banana have shame you rushed Break pieces loose reglue until get right straight should able bend top longeron down touch set Former 6 have everything straight Hot Stuff two side longerons together full length still like apply small fillet Titebond glue balsa joint just diehard May1985 29 Left Lightweight pilot Cpu uee eJecIIn ugats show up nicely inside large canopy Sign reminds judges model Spo should viewed distance Right Large canopy necessitates finished interior Panels match documentation suice text Seat bumps pieces small resistors diodes Hows example creativeness guess Install Former 1 shape engine bearers suit Start planking covering top side longeron piece t balsa approx 1 wide runs front Former 1 way end tail hobby shops now have long balsa ask Next install another 1-in balsa strip along bottom side longeron Hot Stuff former go point fuselage starts curving used -in-wide balsa strips sanded needed get good joint between pieces Hot Stuff works wonders type planking can really get job done fast want use larger pieces will have soak ammonia riibberband place until dry shape dry can trim size glue place Add cockpit floor plan intend finish area elected make canopy interior separate unit finished Ijust glued place glue wing hold-down blocks until wing saddle area com pleted front hold-down bolt can exchanged hole wood dowel arrangement desired would suggest decide what type pushrods intend use can install before planking completed generally use Sullivan GoldN-Rods keep bending install 1/16-in music wire inside center section also helps assure fairly straight run down fuselage Keep music wire about t end make room threaded connectors Make sure anchor Gold-N-Rods formers about 4 keep bending under loads major cause trim changes Before rear planking finished cut out Formers Ri through R5 build vertical fin place Attach another -in balsa strip between top fin Former 11for alignment during final gluing assembly Sand formers good fit leading trailing edge Add planking make smooth joint between fin fuselage planking use resin/microbalboons fillets type Cm strake can either added now later oonvenience rudder assembly made joining perimeter members adding 3/32 balsa pieces between ribs Sand con tour glue set plank 1/16 balsa 7 p Lelt fliS View UflOWB mu uuu6d strake front stabilizer small stabilizer P15165 tne veriicai Tin nigni microballOOns/resin mix 1/64-in plywood base Note flaps extend under wing fillets fUII-uILO plane 30 Model Aviation AUTflO ana ins i uguna unuppag nithe Mint Julep Meet Model did reasonablyweil its first year qualifying compete US Scale Masters held Kansas City MO installation Rhom Air retracts typi cal foam-type wing Landing gear legs 5/32-in music wire covered vari ous parts Robart P-Si gear legs Fliea sanaca ana poiisnea Lucite used wing tip lights tail lights really work being powered nina-volt battery Nice detailing pays off NO OCR TEXT good time cut out stab ribs build stab assembly over plan shown place music wire elevator stiffener shown purchased pre formed Sig connector nylon horn already attached center takes little work use method hides elevator horn within fuselage effort will appreciated later model has completed have built stab elevator set aside until have finished wing Wing Cut out center section tip templates ood have wire foam cutter ask around area someone can help almost sure find someone can cut ask can help youll want get some experience done may wnt make own cutter someday person also will know get required foam can find anyone help companies have advertised magazine offering custom foam cut ting furnish templates money After foam oores posses sion add leading trailing edges Mark accurate centerline through tip front back will use later alignment Make necessary cutouts aile ron bellcrank assemblies make cutouts retract gear assembligs install aileron pushrods make two long parallel cuts t remove foam between Install Gold-NRods glue place Reinstall foam using Titebond glue foam can reused because little pieces forget install soft piece -in balsa Sand flush top foam core glue 3-in sheets 1/16 balsa together form sheet large enough cover side core piece apply balsa skins prefer use Dave Brown Products Southern Sorgum waterbased contact-type adhesive sheet ing careful twist warp core Also sure block up tips wing proper amount washout Vhen adhesive ready set core straight surface Lay sheet balsa core lightly start rubbing sheet oore randomly should happen attach rear trailing edge tip attach leading edge root section oould end up instant warp Before start visualize line running proportionally down core root tip Gently rub fingertips palm down line pro gress toward trailing edge time moving proportionally down core same forward leading edge should end up very straight wing Now can rub down hard using same technique final bond oore same other side method lets put accurate amount washout tip nothing tapered shim tip root under trailing edge two cores complete can joined together 5-mm epoxy would like explain Ijoin wing halves together ensure form true wing straight-flying aircraft building Pattern models learned wing tips must perfectly aligned can get Most kit instructions tell builder align center sections glue point should done because foam cores cut straight root tip joined checking may end up very large propeller-type twisted wing will track wings level through looping maneuver Since wing tips much work during various maneuvers seems tips panel must well aligned j Id N. t5 Ti tart alignment process making centerline tips foam cores Glue piece -in-wide balsa under line dont already have go hardware store purchase two 6-in bubble levels match flat surface sure read same Block up wing tips flat table place level balsa strip tips Keep shimming wing tip until bubbles exactly seine tips alignment may find center sections dont match dont worry about this joint will hidden inside fuselage have seen cores did match center much mbled way Yet finished model flew correctly center joint gluing has cured apply 4-in-wide piece heavy-duty fiberglass along top bottom 32 Model Aviation canopy occupying much fuselage depth still plenty room under servos receiver air tank gearall accessible maintenance Full-Size Plans Available. See Page 172 I1 I-I-Il ~-II L1h~ L / I— L -P ________________II T, 7.II ---S,--_A____ _____________ ____/ ______1__ U 03/3-nw. 3 3 0I23458 1583. EM-5IZ Tucio 1~ 00/ /I /C I3-0fl 1. centerline joint find best use finishing resin application Cut aileron flap parts sheet balsa Sand size rough contour mount wing favorite binges Final-sand ailerons flaps good fit trailing edge Add balsa wing tips final-sand finishing Cover edges retract gent cutouts 1/64 plywood held place 5mm epoxy material forms around wheel circle very easily work grain Add epoxy install nextlarger-size wheel have sitting around wing complete cut sand wing saddles good fit Make sure wing angled correctly shown plans Measure wing tip top vertical fin check wing square fuselage generally use 1/64 plywood base wing fillet add balsa scraps resin/microbal loons finish Install wing hold-down blocks epoxy drill tap assembly wing fuselage Add balsa triangle reinforcing top hold-down blocks additional sup port Cut opening rear fin stabilizer Cut sand fuselage sheeting can align stab wing fin Take time block up fuselage double-measure assure true alignment between wing fin stab Later youll glad took time get right Glue stab place add appropriate resin/microballoon fillets Reinstall fin pieces after elevator hinged stab Install rudder vertical fin basic building assembly oomplete install engine/muffler com bination Most current expansiontype mufflers will fit outside cowl Later installed aDu-Bro Muffle-aire cleaner look nearly quiet expansion-type thats consideration depending upon fly alas contest judges will downgrade muffler showing Add retract gear fuel tank battery preliminary balance check center gravity CG point shown plans model tail-heavy posi tion servos will help offset problem Most battery packs will fit between Formers 6 7 add about ead nose Tucano make balance properly particular model has fairly heavy finish yet weighs 11 lb ready flynot bad considering size model second attempt nearing completion May1985 33 V/ -- 7OOC tN j2 _____I// I-11 _________4 I 2I______________ fjC. written weighing 10 lb no ballast up front Cowl first attempt making fiberglass cowl Once got started really went easy Just remember doesnt look too neat until final sanding has completed Heres process used obtained Styrofoam block cut fit forward part fuselage betwen Formem 1 3 tack-glued place type foam sands easily careful go too fast Sand shape foam fit contoursand flush fuselage planking oomplete remove fuselage very carefully remove additional 1/16 over make up thickness fiberglass will applied Lay up medinm-weight fiberglass over form add finishing resin go used strips about i wide would mold easily around scoop area Let 34 Model Aviation L 5K I, -jj K i~ 12 High seating position full canopy provide visibility Tucano especially good fortralning pilots Models deviation scale isa more-forward nose gear strut Full-Size Plans Available. See Page 172 I II o0 0RI _I 4_____ ____ _____ _________7_ 0-.[v32][b-1-10-1-10]] __________ EMR-32 Tucano 0I2340 ncs first application cure sand rough spots 80-grit paper Cover another layer cloth/resin additional layers until thickness want achieved cowl about 1/16 thick though thicker needs Sand final shape finish Cut gouge out foam shell Add several coats primer fiberglass cowl Lat er can cut air intakes out add other openings glow plug ex haust required very small cutout will needed clear nose gear strut Heated exhaust air will exit through nose gear area Canopy As cowl no canopy can buy model learn form clear plastic material first looked clear plastic object could effort save myself going though big ordeal making canopy After realized no other choice studied problem awhile found particular can opy design relatively easy make because compound curving very slight can make canopy use vacuum-form After reviewing several methods mak ing canopy mold decided just build part fuselage cut loose later use made Formers 6 through 10 full-size planked canopy area time planking rest fuselage tack-glued some alsa pieces along top canopy floor put braces side-to-side former cut through formers along line before completing planking plan right can cut canopy area loose separate unit after sanding filling complete unit plenty strong purpose hot plastic does require lot pressure Make surface smooth can Any bumps seams planking will show up finished canopy applied two separate heavy coats finishing resin sanded unit smooth finishing 400-grit wet sandpaper 0000 steel wool Balsa USA sells plastic canopy material foot low oost Buy enough about three canopies spoil wont have reorder wait arrive Besides once youve completed project will find other things youll want form tacked plastic two pieces hardwood about 1 sq length plastic Place small tacks about apart keep plastic straight staples did hold wood well enough Cut plastic about 3 longer canopy about oven width Arrange form close oven some object will let hands go down over sides form Set oven 450g Mine electric really dont know will work gas May1985 35 1 A_ _U A- St5 F N1-Z Tc&~ oven think out before begin want burn up able finish project Put some gloves protect hands hold plastic wood edges place oven far will go actually heated end awhile switched ends plastic did go way oven plastic will start sag gets hot critical stage will see start smoke little sags andyouwillwant take out Dont Its notready yet Wait until sags about i its hot enough make transfer oven mold cooling off too much ready move mold push plastic stralght down over mold Run hand over sides form will see plastic go right over shape slick whistle Hold position about 30 secuntil plastic cools get plastic hot enough will stretch over mold tried four times before did right Just reheat plastic oven again success air suggest make another will have spare case future accidents paint spills what ever Stand back admire handi work youre like youll glad gave try FinIshing generally use finishing resin appropriate paint first apply oz fiberglass cloth wood resin brushed soldering acid-type brush hard bristles allows brush resin through cloth apply enough resin fill cloth form hard shell wood Excess use such several coats material unneces sary will add weight require much sanding Sand resin 80-grit paper remove lumps bumps Next apply several heavy coats primer dry sand 220-grit paper until final smoothness achieved have good finish coat will needed Sand lightly again Dont pile primer covers model like coat plaster trying level fill grain Primer weighs bunch thats especially harmful way back tail area used K&B white epoxy base coat applied spraying After dry covered model completely Fliteglas Liquid Masking Film great stuff dry can draw designs top felt-tip pen pencil drawing complete cut design lines sharp X-Acto blade lift off portion want color next color has applied has dried reapply LMF over new paint proceed same other colors lettering small insignias Continued page 138 36 Model Aviation Full-Size Plans Available. See Page 172 Tucano afloat few modern aircraft using propeller tricycle gearthat suit able dupiication modei form Great takeoffs andingsmuch iike Pattern ship 1* PLANS * TARBGbY 7 cially Turn-around thin 850 sq in. 120 cycle powered Ron Chidgey design templates computer plotted smooth solid performer Rib Plans construction hints $1 195 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics Its predecess ors Plans construction hInts WELLER 3 BLADE FIBERGLASS PROP proven lh hats Interna tIonal competition 1310 $2000 IVANS MAGIC GADGET protractor device used Ivan Krlatensen accurately measure aileron elevator add rudder throw Takes guess work out trimmIng Out airplane qualIty tool complete Instructions log book carrying case $795 SEE YOUR DEALER OR ORuaK UIRtLI lieve March 1937 plane Frank Tinsley think Loire French gull-wing parasol fightershown rear top quarter climbed toward title have first-issue covers framed am missing father thanks mother thanks thank you. Bill Winter 4432 Altura Ct Fafrfax VA 22030 Editor Bill Winter has granted leave absence producing col unin period time presently determined meantime have hand couple other articles Bill will printed next few months Before anyone jumps wrong conclu sion let make plain hasnt fired arent unhappy him isnt unhappy us let urge readers refrain writing Bill editorial offices about quick resumption Fun column would WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slipfit phenolic sockets build wing structure Now size models 718 die x 3 5 1* die x 2 5 1$ die x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 00s wIth 1ThW reaL bearing Both SLEEVE PULLER 0795for BEARING PULLER -15$1395 TRANSMITTER CASE An ineepensive rugged molded case protect expensIve transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1695 Qator WC Products 3713 PolapaflO Drive P Paniacola FL 3251$ Phone 90$ $76- 8639 INCLUVE $100 PER ITEM FOR UPS counterproductive rl R Wheeley Tucano/Naber Continued page 36 model cut out LMF painted small brush Using method can get correct scale stars bars etc have use closest-available size decals dont need seal painted-on items coat clear decals have mix special color remember keep small amount touch-ups probably will neces sary later Flying past building flying experiences guess have flown ofjust about popular model avail able Yet initial takeoff newly-completed model always have first flight jitters time no different engine running ship sitting end McDonnell-Douglas clubs asphalt run way time comes have advanced throttle power aircraft ran true down runway actually made nice slow takeoff itself due too much up-eleva tor trim After Tucano climbed flight altitude necessary trim abit down-elevator flew model around about six laps field prepared first landing lowered retract gear added about 25% flaps new model like limit first flight takeoff landing know handles well crucial areas nerves relax little can turn attention various other maneuvers following flights Tucano landed just like Curare Pattern airplane say least quite impressed what developed subsequent flights found due basic long moment arrangement flies smoothly nearly responsively Pattern airplane Landings flat true no tendency drop wing tip extremely low landing speeds first three Sport Scale contests entered Tucano static points right up other top models Everyone has seen fly tells impressed Tucano s looks air What could modeler want Buy big bag balsaand happy building Radio Technique/Myers Continued page 39 als Heath catalog changes time time dont hold against product has discontinued Specifically Radio Telephone oper ators license pilot has con fers license use Aviation Band 109135 MHz does permit use Amateur Radio bands George M Myers 70 Froehlich Farm Rd. Hicksville NY 11801 138 ModelAviation . CW f oo Designed Turnaround Pattern 3de~1 dd ~0O O~Gte le5 tB &MODEL AIRCRAFT 9$~ ex w P0 Box 1902 Greenville TX 75401 2144546441 GONTIOLIKI ThU PROFILE0COMBA 7RA T WIDE & NARROW WEDGE 1 5 6 oz Capacities UNIFLOW & STINDD Custom lieu Fuels Ingredients detailed bochur5OC stomps/check CAROLINATAFFINDER 8345 Delhi Road Charleston Hats. SC 29418 3563-7169
Edition: Model Aviation - 1985/05
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 138
The prototype unique two-place turboprop military trainer produced Brazil Ourauthors66-in-span RCSport Scale version 75 engine flies smoothly nearly responsively good Pattern airplane EJoseph R Naber AS MOST model builders inclined sitting work room waiting last coat paint dry latest creation started wonder what should work next Having built previous Scale models tail draggers decided time find suitable subject tricycle gear setup thought would give aging fin gers little help during takeoff landing proce dures may have noticed too noncivilian aircraft around days have tricycle gear also prop-driven thorough review aircraft nth able througn aero uthor learne ri mu abouth linethe books did nothing help matteruntil picked up then-current issue Aircraft International magazine ad Brazilian EMB-31 2 Tucano twin-seat turboprop trainer minute saw photo knew features aircraft wanted build model form wrote sales office listed England several weeks later kind enough send very detailed brochure pictures three-view draw ings After reviewing litera ture knew instantly made right choice EMB-31 2Tucano built EMBRAER Company Brazil designated T 27 Brazilian Air Force tandem-seat trainer pow ered Pratt Whitney PT6A-25C free turbine engine developing 750 static hp driving three-bladed Hartzell propeller Maximum speed 253 knots 291 mph unique incorporating Martin-Baker ejection seats although trainer one-piece canopy hinges side easy entry exit aircraft stressed plus six minus three gravities allowing perform com plete range aerobatic ma neuvers Tucano now being used Brazilian Air Force flight demonstration team very exte tide Tucano January 1983 issue ternational magazine Number 1 last repor copies issue wu able fora accepte Brazil trying sell aircraft other countriesand has sold some Egypt near future should seeing some varied paint schemes modeling use above information developed model plans using projector enlarge three-views size needed influenced several kit models recently built having larger 60 engines wingspans 60 found models flew much nicer models heavier wing loadings used build After examining several wingspan power plant combinations settled 90 engine 68-in wingspan As model developed began feel 90 engine would too powerful changed 75 cu Supertigre has proved very effective has served quite well also know now good 60 engine has plenty power fly aircraftdue models lightness its size its aerodynamically clean configuration proceeded draw up plans adding formers other details required After several preliminary sketches shuffling pieces arrived final setup thought wanted amazing much time can spend deciding several assembly methods use what will give best results efficient use materials simple things take timelike should wing bolted front should dowel-and-hole arrange ment used Consideration radio gear wing construction various other items come play during choice pro cess Ultimately what enjoyable get use construction methods comfortable use materials suit building tech niques best deviation scale make model location nose gear strut Because inverted engine move rearward however nearly noticeable side-mounted-engine alternative would cylinder sticking out breeze elected have retracting landing gear flaps also decided install bomb dropping mechanisms wing pylons however shown plans Construction text written see tightly-cowled engine tur bo exhaust stacks hand-flied alumi num nose gear mounted landing light assumption have varied know ledge building techniques have some familiarity ideas materials used model past square fuselage type model may have trouble aspect unless have some experienced friends can help out hasnt tried build model before knew everything about what doing As matter fact did very thing project learn After reading article through will see will have learn form clear plastic canopy make fiberglass cowl Making items prototype model first time both worked out quite well After reading made canopy mold decide yours same way must adjust cutting fuselage formers include uppermost part formers correct outline canopy shown must make allowance thickness balsa sheeting Len oupenigre uu engine iiueu wuit ier Fiberglass exhaust stacks open engine area allow nested air escape Right Velcro strips hold dummy gas tank wing pylon Music wire pins front rear Velcro assure tank alignment 28 Model Aviation Weii-baianced layout turboprop design makes easy see wny seversi mla-ast countries buying Brazilian Tucano torthelrtralning programs Photos bythe author engine cooling Inlet very effective air goes directly over engines cylin der head Note small hole feed carb NASA scoop glow plug access Fuselage Start cutting out form ers Use medium weight balsa throughout leave heavy stuff hobby shop next guys slab-sided fuselage tail moment long lightness tail area will pay big dividends lessening amount ballast may need nose Formers 1 2 3 4 must reviewed altered necessary suit engine bearer spacing needed particular engine made bearers little oversize could trim suit later time Former 1 must also sized time fit spinner will use use balsa fuel tank com partment floor feel member helps absorb forces forward-mount ed nose landing gear box Use retract gear other type shownwill necessi tate some revision formers mounting box Keep front gear box least Ys engine cylinder proper airflow inside cowling Again adjust fit particular engine muffler Model all-balsa resin base finish Final finish K&B Superpoxy de tailing done use Liquid Masking Film Text detaiisthis quick easytrimming system side view plans note show alsa longerons top bottom fuselage omis sion clarity formers show cuts pieces Before assembly begins mark rear formers pen about de edges After fuselage together almost completely planked can use outline hollow out centers formers lightness after planking completed inner strengthweightis needed Splice /4 sq balsa pieces make correct number longerons will go end fuselage other Glue two /4 sq longerons side Formers 4 5 clamp rubberband together ends keep aligned glue two longerons together time Being sep arate will easier bend curvature fuselage want flexible until tail complete Assemble Formers 2 3 4 5 6 around engine bearers tank bottom Add / sq longeron between Formers 2 6 let overhang Former 2so will support Former 1 later bottom longeron goes long piece back tail timefor alignment pur poses Add Formers 7 through 11 Tackglue place Hot Stuff favorite cyanoacrylate CyA glue CyA glues very useful allowing us build type fuselage internal crutches formerly required straightness during construction use CyA everything should have some hand seem using CyA more because really saves time Add Formers 12 through 18 Add rear top longeron Former 11 tail Tack place let stick out forward past Former 6 Sight down finished unit make sure have just built yourself big balsa banana have shame you rushed Break pieces loose reglue until get right straight should able bend top longeron down touch set Former 6 have everything straight Hot Stuff two side longerons together full length still like apply small fillet Titebond glue balsa joint just diehard May1985 29 Left Lightweight pilot Cpu uee eJecIIn ugats show up nicely inside large canopy Sign reminds judges model Spo should viewed distance Right Large canopy necessitates finished interior Panels match documentation suice text Seat bumps pieces small resistors diodes Hows example creativeness guess Install Former 1 shape engine bearers suit Start planking covering top side longeron piece t balsa approx 1 wide runs front Former 1 way end tail hobby shops now have long balsa ask Next install another 1-in balsa strip along bottom side longeron Hot Stuff former go point fuselage starts curving used -in-wide balsa strips sanded needed get good joint between pieces Hot Stuff works wonders type planking can really get job done fast want use larger pieces will have soak ammonia riibberband place until dry shape dry can trim size glue place Add cockpit floor plan intend finish area elected make canopy interior separate unit finished Ijust glued place glue wing hold-down blocks until wing saddle area com pleted front hold-down bolt can exchanged hole wood dowel arrangement desired would suggest decide what type pushrods intend use can install before planking completed generally use Sullivan GoldN-Rods keep bending install 1/16-in music wire inside center section also helps assure fairly straight run down fuselage Keep music wire about t end make room threaded connectors Make sure anchor Gold-N-Rods formers about 4 keep bending under loads major cause trim changes Before rear planking finished cut out Formers Ri through R5 build vertical fin place Attach another -in balsa strip between top fin Former 11for alignment during final gluing assembly Sand formers good fit leading trailing edge Add planking make smooth joint between fin fuselage planking use resin/microbalboons fillets type Cm strake can either added now later oonvenience rudder assembly made joining perimeter members adding 3/32 balsa pieces between ribs Sand con tour glue set plank 1/16 balsa 7 p Lelt fliS View UflOWB mu uuu6d strake front stabilizer small stabilizer P15165 tne veriicai Tin nigni microballOOns/resin mix 1/64-in plywood base Note flaps extend under wing fillets fUII-uILO plane 30 Model Aviation AUTflO ana ins i uguna unuppag nithe Mint Julep Meet Model did reasonablyweil its first year qualifying compete US Scale Masters held Kansas City MO installation Rhom Air retracts typi cal foam-type wing Landing gear legs 5/32-in music wire covered vari ous parts Robart P-Si gear legs Fliea sanaca ana poiisnea Lucite used wing tip lights tail lights really work being powered nina-volt battery Nice detailing pays off NO OCR TEXT good time cut out stab ribs build stab assembly over plan shown place music wire elevator stiffener shown purchased pre formed Sig connector nylon horn already attached center takes little work use method hides elevator horn within fuselage effort will appreciated later model has completed have built stab elevator set aside until have finished wing Wing Cut out center section tip templates ood have wire foam cutter ask around area someone can help almost sure find someone can cut ask can help youll want get some experience done may wnt make own cutter someday person also will know get required foam can find anyone help companies have advertised magazine offering custom foam cut ting furnish templates money After foam oores posses sion add leading trailing edges Mark accurate centerline through tip front back will use later alignment Make necessary cutouts aile ron bellcrank assemblies make cutouts retract gear assembligs install aileron pushrods make two long parallel cuts t remove foam between Install Gold-NRods glue place Reinstall foam using Titebond glue foam can reused because little pieces forget install soft piece -in balsa Sand flush top foam core glue 3-in sheets 1/16 balsa together form sheet large enough cover side core piece apply balsa skins prefer use Dave Brown Products Southern Sorgum waterbased contact-type adhesive sheet ing careful twist warp core Also sure block up tips wing proper amount washout Vhen adhesive ready set core straight surface Lay sheet balsa core lightly start rubbing sheet oore randomly should happen attach rear trailing edge tip attach leading edge root section oould end up instant warp Before start visualize line running proportionally down core root tip Gently rub fingertips palm down line pro gress toward trailing edge time moving proportionally down core same forward leading edge should end up very straight wing Now can rub down hard using same technique final bond oore same other side method lets put accurate amount washout tip nothing tapered shim tip root under trailing edge two cores complete can joined together 5-mm epoxy would like explain Ijoin wing halves together ensure form true wing straight-flying aircraft building Pattern models learned wing tips must perfectly aligned can get Most kit instructions tell builder align center sections glue point should done because foam cores cut straight root tip joined checking may end up very large propeller-type twisted wing will track wings level through looping maneuver Since wing tips much work during various maneuvers seems tips panel must well aligned j Id N. t5 Ti tart alignment process making centerline tips foam cores Glue piece -in-wide balsa under line dont already have go hardware store purchase two 6-in bubble levels match flat surface sure read same Block up wing tips flat table place level balsa strip tips Keep shimming wing tip until bubbles exactly seine tips alignment may find center sections dont match dont worry about this joint will hidden inside fuselage have seen cores did match center much mbled way Yet finished model flew correctly center joint gluing has cured apply 4-in-wide piece heavy-duty fiberglass along top bottom 32 Model Aviation canopy occupying much fuselage depth still plenty room under servos receiver air tank gearall accessible maintenance Full-Size Plans Available. See Page 172 I1 I-I-Il ~-II L1h~ L / I— L -P ________________II T, 7.II ---S,--_A____ _____________ ____/ ______1__ U 03/3-nw. 3 3 0I23458 1583. EM-5IZ Tucio 1~ 00/ /I /C I3-0fl 1. centerline joint find best use finishing resin application Cut aileron flap parts sheet balsa Sand size rough contour mount wing favorite binges Final-sand ailerons flaps good fit trailing edge Add balsa wing tips final-sand finishing Cover edges retract gent cutouts 1/64 plywood held place 5mm epoxy material forms around wheel circle very easily work grain Add epoxy install nextlarger-size wheel have sitting around wing complete cut sand wing saddles good fit Make sure wing angled correctly shown plans Measure wing tip top vertical fin check wing square fuselage generally use 1/64 plywood base wing fillet add balsa scraps resin/microbal loons finish Install wing hold-down blocks epoxy drill tap assembly wing fuselage Add balsa triangle reinforcing top hold-down blocks additional sup port Cut opening rear fin stabilizer Cut sand fuselage sheeting can align stab wing fin Take time block up fuselage double-measure assure true alignment between wing fin stab Later youll glad took time get right Glue stab place add appropriate resin/microballoon fillets Reinstall fin pieces after elevator hinged stab Install rudder vertical fin basic building assembly oomplete install engine/muffler com bination Most current expansiontype mufflers will fit outside cowl Later installed aDu-Bro Muffle-aire cleaner look nearly quiet expansion-type thats consideration depending upon fly alas contest judges will downgrade muffler showing Add retract gear fuel tank battery preliminary balance check center gravity CG point shown plans model tail-heavy posi tion servos will help offset problem Most battery packs will fit between Formers 6 7 add about ead nose Tucano make balance properly particular model has fairly heavy finish yet weighs 11 lb ready flynot bad considering size model second attempt nearing completion May1985 33 V/ -- 7OOC tN j2 _____I// I-11 _________4 I 2I______________ fjC. written weighing 10 lb no ballast up front Cowl first attempt making fiberglass cowl Once got started really went easy Just remember doesnt look too neat until final sanding has completed Heres process used obtained Styrofoam block cut fit forward part fuselage betwen Formem 1 3 tack-glued place type foam sands easily careful go too fast Sand shape foam fit contoursand flush fuselage planking oomplete remove fuselage very carefully remove additional 1/16 over make up thickness fiberglass will applied Lay up medinm-weight fiberglass over form add finishing resin go used strips about i wide would mold easily around scoop area Let 34 Model Aviation L 5K I, -jj K i~ 12 High seating position full canopy provide visibility Tucano especially good fortralning pilots Models deviation scale isa more-forward nose gear strut Full-Size Plans Available. See Page 172 I II o0 0RI _I 4_____ ____ _____ _________7_ 0-.[v32][b-1-10-1-10]] __________ EMR-32 Tucano 0I2340 ncs first application cure sand rough spots 80-grit paper Cover another layer cloth/resin additional layers until thickness want achieved cowl about 1/16 thick though thicker needs Sand final shape finish Cut gouge out foam shell Add several coats primer fiberglass cowl Lat er can cut air intakes out add other openings glow plug ex haust required very small cutout will needed clear nose gear strut Heated exhaust air will exit through nose gear area Canopy As cowl no canopy can buy model learn form clear plastic material first looked clear plastic object could effort save myself going though big ordeal making canopy After realized no other choice studied problem awhile found particular can opy design relatively easy make because compound curving very slight can make canopy use vacuum-form After reviewing several methods mak ing canopy mold decided just build part fuselage cut loose later use made Formers 6 through 10 full-size planked canopy area time planking rest fuselage tack-glued some alsa pieces along top canopy floor put braces side-to-side former cut through formers along line before completing planking plan right can cut canopy area loose separate unit after sanding filling complete unit plenty strong purpose hot plastic does require lot pressure Make surface smooth can Any bumps seams planking will show up finished canopy applied two separate heavy coats finishing resin sanded unit smooth finishing 400-grit wet sandpaper 0000 steel wool Balsa USA sells plastic canopy material foot low oost Buy enough about three canopies spoil wont have reorder wait arrive Besides once youve completed project will find other things youll want form tacked plastic two pieces hardwood about 1 sq length plastic Place small tacks about apart keep plastic straight staples did hold wood well enough Cut plastic about 3 longer canopy about oven width Arrange form close oven some object will let hands go down over sides form Set oven 450g Mine electric really dont know will work gas May1985 35 1 A_ _U A- St5 F N1-Z Tc&~ oven think out before begin want burn up able finish project Put some gloves protect hands hold plastic wood edges place oven far will go actually heated end awhile switched ends plastic did go way oven plastic will start sag gets hot critical stage will see start smoke little sags andyouwillwant take out Dont Its notready yet Wait until sags about i its hot enough make transfer oven mold cooling off too much ready move mold push plastic stralght down over mold Run hand over sides form will see plastic go right over shape slick whistle Hold position about 30 secuntil plastic cools get plastic hot enough will stretch over mold tried four times before did right Just reheat plastic oven again success air suggest make another will have spare case future accidents paint spills what ever Stand back admire handi work youre like youll glad gave try FinIshing generally use finishing resin appropriate paint first apply oz fiberglass cloth wood resin brushed soldering acid-type brush hard bristles allows brush resin through cloth apply enough resin fill cloth form hard shell wood Excess use such several coats material unneces sary will add weight require much sanding Sand resin 80-grit paper remove lumps bumps Next apply several heavy coats primer dry sand 220-grit paper until final smoothness achieved have good finish coat will needed Sand lightly again Dont pile primer covers model like coat plaster trying level fill grain Primer weighs bunch thats especially harmful way back tail area used K&B white epoxy base coat applied spraying After dry covered model completely Fliteglas Liquid Masking Film great stuff dry can draw designs top felt-tip pen pencil drawing complete cut design lines sharp X-Acto blade lift off portion want color next color has applied has dried reapply LMF over new paint proceed same other colors lettering small insignias Continued page 138 36 Model Aviation Full-Size Plans Available. See Page 172 Tucano afloat few modern aircraft using propeller tricycle gearthat suit able dupiication modei form Great takeoffs andingsmuch iike Pattern ship 1* PLANS * TARBGbY 7 cially Turn-around thin 850 sq in. 120 cycle powered Ron Chidgey design templates computer plotted smooth solid performer Rib Plans construction hints $1 195 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics Its predecess ors Plans construction hInts WELLER 3 BLADE FIBERGLASS PROP proven lh hats Interna tIonal competition 1310 $2000 IVANS MAGIC GADGET protractor device used Ivan Krlatensen accurately measure aileron elevator add rudder throw Takes guess work out trimmIng Out airplane qualIty tool complete Instructions log book carrying case $795 SEE YOUR DEALER OR ORuaK UIRtLI lieve March 1937 plane Frank Tinsley think Loire French gull-wing parasol fightershown rear top quarter climbed toward title have first-issue covers framed am missing father thanks mother thanks thank you. Bill Winter 4432 Altura Ct Fafrfax VA 22030 Editor Bill Winter has granted leave absence producing col unin period time presently determined meantime have hand couple other articles Bill will printed next few months Before anyone jumps wrong conclu sion let make plain hasnt fired arent unhappy him isnt unhappy us let urge readers refrain writing Bill editorial offices about quick resumption Fun column would WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slipfit phenolic sockets build wing structure Now size models 718 die x 3 5 1* die x 2 5 1$ die x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 00s wIth 1ThW reaL bearing Both SLEEVE PULLER 0795for BEARING PULLER -15$1395 TRANSMITTER CASE An ineepensive rugged molded case protect expensIve transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1695 Qator WC Products 3713 PolapaflO Drive P Paniacola FL 3251$ Phone 90$ $76- 8639 INCLUVE $100 PER ITEM FOR UPS counterproductive rl R Wheeley Tucano/Naber Continued page 36 model cut out LMF painted small brush Using method can get correct scale stars bars etc have use closest-available size decals dont need seal painted-on items coat clear decals have mix special color remember keep small amount touch-ups probably will neces sary later Flying past building flying experiences guess have flown ofjust about popular model avail able Yet initial takeoff newly-completed model always have first flight jitters time no different engine running ship sitting end McDonnell-Douglas clubs asphalt run way time comes have advanced throttle power aircraft ran true down runway actually made nice slow takeoff itself due too much up-eleva tor trim After Tucano climbed flight altitude necessary trim abit down-elevator flew model around about six laps field prepared first landing lowered retract gear added about 25% flaps new model like limit first flight takeoff landing know handles well crucial areas nerves relax little can turn attention various other maneuvers following flights Tucano landed just like Curare Pattern airplane say least quite impressed what developed subsequent flights found due basic long moment arrangement flies smoothly nearly responsively Pattern airplane Landings flat true no tendency drop wing tip extremely low landing speeds first three Sport Scale contests entered Tucano static points right up other top models Everyone has seen fly tells impressed Tucano s looks air What could modeler want Buy big bag balsaand happy building Radio Technique/Myers Continued page 39 als Heath catalog changes time time dont hold against product has discontinued Specifically Radio Telephone oper ators license pilot has con fers license use Aviation Band 109135 MHz does permit use Amateur Radio bands George M Myers 70 Froehlich Farm Rd. Hicksville NY 11801 138 ModelAviation . CW f oo Designed Turnaround Pattern 3de~1 dd ~0O O~Gte le5 tB &MODEL AIRCRAFT 9$~ ex w P0 Box 1902 Greenville TX 75401 2144546441 GONTIOLIKI ThU PROFILE0COMBA 7RA T WIDE & NARROW WEDGE 1 5 6 oz Capacities UNIFLOW & STINDD Custom lieu Fuels Ingredients detailed bochur5OC stomps/check CAROLINATAFFINDER 8345 Delhi Road Charleston Hats. SC 29418 3563-7169
Edition: Model Aviation - 1985/05
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 138
The prototype unique two-place turboprop military trainer produced Brazil Ourauthors66-in-span RCSport Scale version 75 engine flies smoothly nearly responsively good Pattern airplane EJoseph R Naber AS MOST model builders inclined sitting work room waiting last coat paint dry latest creation started wonder what should work next Having built previous Scale models tail draggers decided time find suitable subject tricycle gear setup thought would give aging fin gers little help during takeoff landing proce dures may have noticed too noncivilian aircraft around days have tricycle gear also prop-driven thorough review aircraft nth able througn aero uthor learne ri mu abouth linethe books did nothing help matteruntil picked up then-current issue Aircraft International magazine ad Brazilian EMB-31 2 Tucano twin-seat turboprop trainer minute saw photo knew features aircraft wanted build model form wrote sales office listed England several weeks later kind enough send very detailed brochure pictures three-view draw ings After reviewing litera ture knew instantly made right choice EMB-31 2Tucano built EMBRAER Company Brazil designated T 27 Brazilian Air Force tandem-seat trainer pow ered Pratt Whitney PT6A-25C free turbine engine developing 750 static hp driving three-bladed Hartzell propeller Maximum speed 253 knots 291 mph unique incorporating Martin-Baker ejection seats although trainer one-piece canopy hinges side easy entry exit aircraft stressed plus six minus three gravities allowing perform com plete range aerobatic ma neuvers Tucano now being used Brazilian Air Force flight demonstration team very exte tide Tucano January 1983 issue ternational magazine Number 1 last repor copies issue wu able fora accepte Brazil trying sell aircraft other countriesand has sold some Egypt near future should seeing some varied paint schemes modeling use above information developed model plans using projector enlarge three-views size needed influenced several kit models recently built having larger 60 engines wingspans 60 found models flew much nicer models heavier wing loadings used build After examining several wingspan power plant combinations settled 90 engine 68-in wingspan As model developed began feel 90 engine would too powerful changed 75 cu Supertigre has proved very effective has served quite well also know now good 60 engine has plenty power fly aircraftdue models lightness its size its aerodynamically clean configuration proceeded draw up plans adding formers other details required After several preliminary sketches shuffling pieces arrived final setup thought wanted amazing much time can spend deciding several assembly methods use what will give best results efficient use materials simple things take timelike should wing bolted front should dowel-and-hole arrange ment used Consideration radio gear wing construction various other items come play during choice pro cess Ultimately what enjoyable get use construction methods comfortable use materials suit building tech niques best deviation scale make model location nose gear strut Because inverted engine move rearward however nearly noticeable side-mounted-engine alternative would cylinder sticking out breeze elected have retracting landing gear flaps also decided install bomb dropping mechanisms wing pylons however shown plans Construction text written see tightly-cowled engine tur bo exhaust stacks hand-flied alumi num nose gear mounted landing light assumption have varied know ledge building techniques have some familiarity ideas materials used model past square fuselage type model may have trouble aspect unless have some experienced friends can help out hasnt tried build model before knew everything about what doing As matter fact did very thing project learn After reading article through will see will have learn form clear plastic canopy make fiberglass cowl Making items prototype model first time both worked out quite well After reading made canopy mold decide yours same way must adjust cutting fuselage formers include uppermost part formers correct outline canopy shown must make allowance thickness balsa sheeting Len oupenigre uu engine iiueu wuit ier Fiberglass exhaust stacks open engine area allow nested air escape Right Velcro strips hold dummy gas tank wing pylon Music wire pins front rear Velcro assure tank alignment 28 Model Aviation Weii-baianced layout turboprop design makes easy see wny seversi mla-ast countries buying Brazilian Tucano torthelrtralning programs Photos bythe author engine cooling Inlet very effective air goes directly over engines cylin der head Note small hole feed carb NASA scoop glow plug access Fuselage Start cutting out form ers Use medium weight balsa throughout leave heavy stuff hobby shop next guys slab-sided fuselage tail moment long lightness tail area will pay big dividends lessening amount ballast may need nose Formers 1 2 3 4 must reviewed altered necessary suit engine bearer spacing needed particular engine made bearers little oversize could trim suit later time Former 1 must also sized time fit spinner will use use balsa fuel tank com partment floor feel member helps absorb forces forward-mount ed nose landing gear box Use retract gear other type shownwill necessi tate some revision formers mounting box Keep front gear box least Ys engine cylinder proper airflow inside cowling Again adjust fit particular engine muffler Model all-balsa resin base finish Final finish K&B Superpoxy de tailing done use Liquid Masking Film Text detaiisthis quick easytrimming system side view plans note show alsa longerons top bottom fuselage omis sion clarity formers show cuts pieces Before assembly begins mark rear formers pen about de edges After fuselage together almost completely planked can use outline hollow out centers formers lightness after planking completed inner strengthweightis needed Splice /4 sq balsa pieces make correct number longerons will go end fuselage other Glue two /4 sq longerons side Formers 4 5 clamp rubberband together ends keep aligned glue two longerons together time Being sep arate will easier bend curvature fuselage want flexible until tail complete Assemble Formers 2 3 4 5 6 around engine bearers tank bottom Add / sq longeron between Formers 2 6 let overhang Former 2so will support Former 1 later bottom longeron goes long piece back tail timefor alignment pur poses Add Formers 7 through 11 Tackglue place Hot Stuff favorite cyanoacrylate CyA glue CyA glues very useful allowing us build type fuselage internal crutches formerly required straightness during construction use CyA everything should have some hand seem using CyA more because really saves time Add Formers 12 through 18 Add rear top longeron Former 11 tail Tack place let stick out forward past Former 6 Sight down finished unit make sure have just built yourself big balsa banana have shame you rushed Break pieces loose reglue until get right straight should able bend top longeron down touch set Former 6 have everything straight Hot Stuff two side longerons together full length still like apply small fillet Titebond glue balsa joint just diehard May1985 29 Left Lightweight pilot Cpu uee eJecIIn ugats show up nicely inside large canopy Sign reminds judges model Spo should viewed distance Right Large canopy necessitates finished interior Panels match documentation suice text Seat bumps pieces small resistors diodes Hows example creativeness guess Install Former 1 shape engine bearers suit Start planking covering top side longeron piece t balsa approx 1 wide runs front Former 1 way end tail hobby shops now have long balsa ask Next install another 1-in balsa strip along bottom side longeron Hot Stuff former go point fuselage starts curving used -in-wide balsa strips sanded needed get good joint between pieces Hot Stuff works wonders type planking can really get job done fast want use larger pieces will have soak ammonia riibberband place until dry shape dry can trim size glue place Add cockpit floor plan intend finish area elected make canopy interior separate unit finished Ijust glued place glue wing hold-down blocks until wing saddle area com pleted front hold-down bolt can exchanged hole wood dowel arrangement desired would suggest decide what type pushrods intend use can install before planking completed generally use Sullivan GoldN-Rods keep bending install 1/16-in music wire inside center section also helps assure fairly straight run down fuselage Keep music wire about t end make room threaded connectors Make sure anchor Gold-N-Rods formers about 4 keep bending under loads major cause trim changes Before rear planking finished cut out Formers Ri through R5 build vertical fin place Attach another -in balsa strip between top fin Former 11for alignment during final gluing assembly Sand formers good fit leading trailing edge Add planking make smooth joint between fin fuselage planking use resin/microbalboons fillets type Cm strake can either added now later oonvenience rudder assembly made joining perimeter members adding 3/32 balsa pieces between ribs Sand con tour glue set plank 1/16 balsa 7 p Lelt fliS View UflOWB mu uuu6d strake front stabilizer small stabilizer P15165 tne veriicai Tin nigni microballOOns/resin mix 1/64-in plywood base Note flaps extend under wing fillets fUII-uILO plane 30 Model Aviation AUTflO ana ins i uguna unuppag nithe Mint Julep Meet Model did reasonablyweil its first year qualifying compete US Scale Masters held Kansas City MO installation Rhom Air retracts typi cal foam-type wing Landing gear legs 5/32-in music wire covered vari ous parts Robart P-Si gear legs Fliea sanaca ana poiisnea Lucite used wing tip lights tail lights really work being powered nina-volt battery Nice detailing pays off NO OCR TEXT good time cut out stab ribs build stab assembly over plan shown place music wire elevator stiffener shown purchased pre formed Sig connector nylon horn already attached center takes little work use method hides elevator horn within fuselage effort will appreciated later model has completed have built stab elevator set aside until have finished wing Wing Cut out center section tip templates ood have wire foam cutter ask around area someone can help almost sure find someone can cut ask can help youll want get some experience done may wnt make own cutter someday person also will know get required foam can find anyone help companies have advertised magazine offering custom foam cut ting furnish templates money After foam oores posses sion add leading trailing edges Mark accurate centerline through tip front back will use later alignment Make necessary cutouts aile ron bellcrank assemblies make cutouts retract gear assembligs install aileron pushrods make two long parallel cuts t remove foam between Install Gold-NRods glue place Reinstall foam using Titebond glue foam can reused because little pieces forget install soft piece -in balsa Sand flush top foam core glue 3-in sheets 1/16 balsa together form sheet large enough cover side core piece apply balsa skins prefer use Dave Brown Products Southern Sorgum waterbased contact-type adhesive sheet ing careful twist warp core Also sure block up tips wing proper amount washout Vhen adhesive ready set core straight surface Lay sheet balsa core lightly start rubbing sheet oore randomly should happen attach rear trailing edge tip attach leading edge root section oould end up instant warp Before start visualize line running proportionally down core root tip Gently rub fingertips palm down line pro gress toward trailing edge time moving proportionally down core same forward leading edge should end up very straight wing Now can rub down hard using same technique final bond oore same other side method lets put accurate amount washout tip nothing tapered shim tip root under trailing edge two cores complete can joined together 5-mm epoxy would like explain Ijoin wing halves together ensure form true wing straight-flying aircraft building Pattern models learned wing tips must perfectly aligned can get Most kit instructions tell builder align center sections glue point should done because foam cores cut straight root tip joined checking may end up very large propeller-type twisted wing will track wings level through looping maneuver Since wing tips much work during various maneuvers seems tips panel must well aligned j Id N. t5 Ti tart alignment process making centerline tips foam cores Glue piece -in-wide balsa under line dont already have go hardware store purchase two 6-in bubble levels match flat surface sure read same Block up wing tips flat table place level balsa strip tips Keep shimming wing tip until bubbles exactly seine tips alignment may find center sections dont match dont worry about this joint will hidden inside fuselage have seen cores did match center much mbled way Yet finished model flew correctly center joint gluing has cured apply 4-in-wide piece heavy-duty fiberglass along top bottom 32 Model Aviation canopy occupying much fuselage depth still plenty room under servos receiver air tank gearall accessible maintenance Full-Size Plans Available. See Page 172 I1 I-I-Il ~-II L1h~ L / I— L -P ________________II T, 7.II ---S,--_A____ _____________ ____/ ______1__ U 03/3-nw. 3 3 0I23458 1583. EM-5IZ Tucio 1~ 00/ /I /C I3-0fl 1. centerline joint find best use finishing resin application Cut aileron flap parts sheet balsa Sand size rough contour mount wing favorite binges Final-sand ailerons flaps good fit trailing edge Add balsa wing tips final-sand finishing Cover edges retract gent cutouts 1/64 plywood held place 5mm epoxy material forms around wheel circle very easily work grain Add epoxy install nextlarger-size wheel have sitting around wing complete cut sand wing saddles good fit Make sure wing angled correctly shown plans Measure wing tip top vertical fin check wing square fuselage generally use 1/64 plywood base wing fillet add balsa scraps resin/microbal loons finish Install wing hold-down blocks epoxy drill tap assembly wing fuselage Add balsa triangle reinforcing top hold-down blocks additional sup port Cut opening rear fin stabilizer Cut sand fuselage sheeting can align stab wing fin Take time block up fuselage double-measure assure true alignment between wing fin stab Later youll glad took time get right Glue stab place add appropriate resin/microballoon fillets Reinstall fin pieces after elevator hinged stab Install rudder vertical fin basic building assembly oomplete install engine/muffler com bination Most current expansiontype mufflers will fit outside cowl Later installed aDu-Bro Muffle-aire cleaner look nearly quiet expansion-type thats consideration depending upon fly alas contest judges will downgrade muffler showing Add retract gear fuel tank battery preliminary balance check center gravity CG point shown plans model tail-heavy posi tion servos will help offset problem Most battery packs will fit between Formers 6 7 add about ead nose Tucano make balance properly particular model has fairly heavy finish yet weighs 11 lb ready flynot bad considering size model second attempt nearing completion May1985 33 V/ -- 7OOC tN j2 _____I// I-11 _________4 I 2I______________ fjC. written weighing 10 lb no ballast up front Cowl first attempt making fiberglass cowl Once got started really went easy Just remember doesnt look too neat until final sanding has completed Heres process used obtained Styrofoam block cut fit forward part fuselage betwen Formem 1 3 tack-glued place type foam sands easily careful go too fast Sand shape foam fit contoursand flush fuselage planking oomplete remove fuselage very carefully remove additional 1/16 over make up thickness fiberglass will applied Lay up medinm-weight fiberglass over form add finishing resin go used strips about i wide would mold easily around scoop area Let 34 Model Aviation L 5K I, -jj K i~ 12 High seating position full canopy provide visibility Tucano especially good fortralning pilots Models deviation scale isa more-forward nose gear strut Full-Size Plans Available. See Page 172 I II o0 0RI _I 4_____ ____ _____ _________7_ 0-.[v32][b-1-10-1-10]] __________ EMR-32 Tucano 0I2340 ncs first application cure sand rough spots 80-grit paper Cover another layer cloth/resin additional layers until thickness want achieved cowl about 1/16 thick though thicker needs Sand final shape finish Cut gouge out foam shell Add several coats primer fiberglass cowl Lat er can cut air intakes out add other openings glow plug ex haust required very small cutout will needed clear nose gear strut Heated exhaust air will exit through nose gear area Canopy As cowl no canopy can buy model learn form clear plastic material first looked clear plastic object could effort save myself going though big ordeal making canopy After realized no other choice studied problem awhile found particular can opy design relatively easy make because compound curving very slight can make canopy use vacuum-form After reviewing several methods mak ing canopy mold decided just build part fuselage cut loose later use made Formers 6 through 10 full-size planked canopy area time planking rest fuselage tack-glued some alsa pieces along top canopy floor put braces side-to-side former cut through formers along line before completing planking plan right can cut canopy area loose separate unit after sanding filling complete unit plenty strong purpose hot plastic does require lot pressure Make surface smooth can Any bumps seams planking will show up finished canopy applied two separate heavy coats finishing resin sanded unit smooth finishing 400-grit wet sandpaper 0000 steel wool Balsa USA sells plastic canopy material foot low oost Buy enough about three canopies spoil wont have reorder wait arrive Besides once youve completed project will find other things youll want form tacked plastic two pieces hardwood about 1 sq length plastic Place small tacks about apart keep plastic straight staples did hold wood well enough Cut plastic about 3 longer canopy about oven width Arrange form close oven some object will let hands go down over sides form Set oven 450g Mine electric really dont know will work gas May1985 35 1 A_ _U A- St5 F N1-Z Tc&~ oven think out before begin want burn up able finish project Put some gloves protect hands hold plastic wood edges place oven far will go actually heated end awhile switched ends plastic did go way oven plastic will start sag gets hot critical stage will see start smoke little sags andyouwillwant take out Dont Its notready yet Wait until sags about i its hot enough make transfer oven mold cooling off too much ready move mold push plastic stralght down over mold Run hand over sides form will see plastic go right over shape slick whistle Hold position about 30 secuntil plastic cools get plastic hot enough will stretch over mold tried four times before did right Just reheat plastic oven again success air suggest make another will have spare case future accidents paint spills what ever Stand back admire handi work youre like youll glad gave try FinIshing generally use finishing resin appropriate paint first apply oz fiberglass cloth wood resin brushed soldering acid-type brush hard bristles allows brush resin through cloth apply enough resin fill cloth form hard shell wood Excess use such several coats material unneces sary will add weight require much sanding Sand resin 80-grit paper remove lumps bumps Next apply several heavy coats primer dry sand 220-grit paper until final smoothness achieved have good finish coat will needed Sand lightly again Dont pile primer covers model like coat plaster trying level fill grain Primer weighs bunch thats especially harmful way back tail area used K&B white epoxy base coat applied spraying After dry covered model completely Fliteglas Liquid Masking Film great stuff dry can draw designs top felt-tip pen pencil drawing complete cut design lines sharp X-Acto blade lift off portion want color next color has applied has dried reapply LMF over new paint proceed same other colors lettering small insignias Continued page 138 36 Model Aviation Full-Size Plans Available. See Page 172 Tucano afloat few modern aircraft using propeller tricycle gearthat suit able dupiication modei form Great takeoffs andingsmuch iike Pattern ship 1* PLANS * TARBGbY 7 cially Turn-around thin 850 sq in. 120 cycle powered Ron Chidgey design templates computer plotted smooth solid performer Rib Plans construction hints $1 195 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics Its predecess ors Plans construction hInts WELLER 3 BLADE FIBERGLASS PROP proven lh hats Interna tIonal competition 1310 $2000 IVANS MAGIC GADGET protractor device used Ivan Krlatensen accurately measure aileron elevator add rudder throw Takes guess work out trimmIng Out airplane qualIty tool complete Instructions log book carrying case $795 SEE YOUR DEALER OR ORuaK UIRtLI lieve March 1937 plane Frank Tinsley think Loire French gull-wing parasol fightershown rear top quarter climbed toward title have first-issue covers framed am missing father thanks mother thanks thank you. Bill Winter 4432 Altura Ct Fafrfax VA 22030 Editor Bill Winter has granted leave absence producing col unin period time presently determined meantime have hand couple other articles Bill will printed next few months Before anyone jumps wrong conclu sion let make plain hasnt fired arent unhappy him isnt unhappy us let urge readers refrain writing Bill editorial offices about quick resumption Fun column would WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slipfit phenolic sockets build wing structure Now size models 718 die x 3 5 1* die x 2 5 1$ die x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 00s wIth 1ThW reaL bearing Both SLEEVE PULLER 0795for BEARING PULLER -15$1395 TRANSMITTER CASE An ineepensive rugged molded case protect expensIve transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1695 Qator WC Products 3713 PolapaflO Drive P Paniacola FL 3251$ Phone 90$ $76- 8639 INCLUVE $100 PER ITEM FOR UPS counterproductive rl R Wheeley Tucano/Naber Continued page 36 model cut out LMF painted small brush Using method can get correct scale stars bars etc have use closest-available size decals dont need seal painted-on items coat clear decals have mix special color remember keep small amount touch-ups probably will neces sary later Flying past building flying experiences guess have flown ofjust about popular model avail able Yet initial takeoff newly-completed model always have first flight jitters time no different engine running ship sitting end McDonnell-Douglas clubs asphalt run way time comes have advanced throttle power aircraft ran true down runway actually made nice slow takeoff itself due too much up-eleva tor trim After Tucano climbed flight altitude necessary trim abit down-elevator flew model around about six laps field prepared first landing lowered retract gear added about 25% flaps new model like limit first flight takeoff landing know handles well crucial areas nerves relax little can turn attention various other maneuvers following flights Tucano landed just like Curare Pattern airplane say least quite impressed what developed subsequent flights found due basic long moment arrangement flies smoothly nearly responsively Pattern airplane Landings flat true no tendency drop wing tip extremely low landing speeds first three Sport Scale contests entered Tucano static points right up other top models Everyone has seen fly tells impressed Tucano s looks air What could modeler want Buy big bag balsaand happy building Radio Technique/Myers Continued page 39 als Heath catalog changes time time dont hold against product has discontinued Specifically Radio Telephone oper ators license pilot has con fers license use Aviation Band 109135 MHz does permit use Amateur Radio bands George M Myers 70 Froehlich Farm Rd. Hicksville NY 11801 138 ModelAviation . CW f oo Designed Turnaround Pattern 3de~1 dd ~0O O~Gte le5 tB &MODEL AIRCRAFT 9$~ ex w P0 Box 1902 Greenville TX 75401 2144546441 GONTIOLIKI ThU PROFILE0COMBA 7RA T WIDE & NARROW WEDGE 1 5 6 oz Capacities UNIFLOW & STINDD Custom lieu Fuels Ingredients detailed bochur5OC stomps/check CAROLINATAFFINDER 8345 Delhi Road Charleston Hats. SC 29418 3563-7169
Edition: Model Aviation - 1985/05
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 138
The prototype unique two-place turboprop military trainer produced Brazil Ourauthors66-in-span RCSport Scale version 75 engine flies smoothly nearly responsively good Pattern airplane EJoseph R Naber AS MOST model builders inclined sitting work room waiting last coat paint dry latest creation started wonder what should work next Having built previous Scale models tail draggers decided time find suitable subject tricycle gear setup thought would give aging fin gers little help during takeoff landing proce dures may have noticed too noncivilian aircraft around days have tricycle gear also prop-driven thorough review aircraft nth able througn aero uthor learne ri mu abouth linethe books did nothing help matteruntil picked up then-current issue Aircraft International magazine ad Brazilian EMB-31 2 Tucano twin-seat turboprop trainer minute saw photo knew features aircraft wanted build model form wrote sales office listed England several weeks later kind enough send very detailed brochure pictures three-view draw ings After reviewing litera ture knew instantly made right choice EMB-31 2Tucano built EMBRAER Company Brazil designated T 27 Brazilian Air Force tandem-seat trainer pow ered Pratt Whitney PT6A-25C free turbine engine developing 750 static hp driving three-bladed Hartzell propeller Maximum speed 253 knots 291 mph unique incorporating Martin-Baker ejection seats although trainer one-piece canopy hinges side easy entry exit aircraft stressed plus six minus three gravities allowing perform com plete range aerobatic ma neuvers Tucano now being used Brazilian Air Force flight demonstration team very exte tide Tucano January 1983 issue ternational magazine Number 1 last repor copies issue wu able fora accepte Brazil trying sell aircraft other countriesand has sold some Egypt near future should seeing some varied paint schemes modeling use above information developed model plans using projector enlarge three-views size needed influenced several kit models recently built having larger 60 engines wingspans 60 found models flew much nicer models heavier wing loadings used build After examining several wingspan power plant combinations settled 90 engine 68-in wingspan As model developed began feel 90 engine would too powerful changed 75 cu Supertigre has proved very effective has served quite well also know now good 60 engine has plenty power fly aircraftdue models lightness its size its aerodynamically clean configuration proceeded draw up plans adding formers other details required After several preliminary sketches shuffling pieces arrived final setup thought wanted amazing much time can spend deciding several assembly methods use what will give best results efficient use materials simple things take timelike should wing bolted front should dowel-and-hole arrange ment used Consideration radio gear wing construction various other items come play during choice pro cess Ultimately what enjoyable get use construction methods comfortable use materials suit building tech niques best deviation scale make model location nose gear strut Because inverted engine move rearward however nearly noticeable side-mounted-engine alternative would cylinder sticking out breeze elected have retracting landing gear flaps also decided install bomb dropping mechanisms wing pylons however shown plans Construction text written see tightly-cowled engine tur bo exhaust stacks hand-flied alumi num nose gear mounted landing light assumption have varied know ledge building techniques have some familiarity ideas materials used model past square fuselage type model may have trouble aspect unless have some experienced friends can help out hasnt tried build model before knew everything about what doing As matter fact did very thing project learn After reading article through will see will have learn form clear plastic canopy make fiberglass cowl Making items prototype model first time both worked out quite well After reading made canopy mold decide yours same way must adjust cutting fuselage formers include uppermost part formers correct outline canopy shown must make allowance thickness balsa sheeting Len oupenigre uu engine iiueu wuit ier Fiberglass exhaust stacks open engine area allow nested air escape Right Velcro strips hold dummy gas tank wing pylon Music wire pins front rear Velcro assure tank alignment 28 Model Aviation Weii-baianced layout turboprop design makes easy see wny seversi mla-ast countries buying Brazilian Tucano torthelrtralning programs Photos bythe author engine cooling Inlet very effective air goes directly over engines cylin der head Note small hole feed carb NASA scoop glow plug access Fuselage Start cutting out form ers Use medium weight balsa throughout leave heavy stuff hobby shop next guys slab-sided fuselage tail moment long lightness tail area will pay big dividends lessening amount ballast may need nose Formers 1 2 3 4 must reviewed altered necessary suit engine bearer spacing needed particular engine made bearers little oversize could trim suit later time Former 1 must also sized time fit spinner will use use balsa fuel tank com partment floor feel member helps absorb forces forward-mount ed nose landing gear box Use retract gear other type shownwill necessi tate some revision formers mounting box Keep front gear box least Ys engine cylinder proper airflow inside cowling Again adjust fit particular engine muffler Model all-balsa resin base finish Final finish K&B Superpoxy de tailing done use Liquid Masking Film Text detaiisthis quick easytrimming system side view plans note show alsa longerons top bottom fuselage omis sion clarity formers show cuts pieces Before assembly begins mark rear formers pen about de edges After fuselage together almost completely planked can use outline hollow out centers formers lightness after planking completed inner strengthweightis needed Splice /4 sq balsa pieces make correct number longerons will go end fuselage other Glue two /4 sq longerons side Formers 4 5 clamp rubberband together ends keep aligned glue two longerons together time Being sep arate will easier bend curvature fuselage want flexible until tail complete Assemble Formers 2 3 4 5 6 around engine bearers tank bottom Add / sq longeron between Formers 2 6 let overhang Former 2so will support Former 1 later bottom longeron goes long piece back tail timefor alignment pur poses Add Formers 7 through 11 Tackglue place Hot Stuff favorite cyanoacrylate CyA glue CyA glues very useful allowing us build type fuselage internal crutches formerly required straightness during construction use CyA everything should have some hand seem using CyA more because really saves time Add Formers 12 through 18 Add rear top longeron Former 11 tail Tack place let stick out forward past Former 6 Sight down finished unit make sure have just built yourself big balsa banana have shame you rushed Break pieces loose reglue until get right straight should able bend top longeron down touch set Former 6 have everything straight Hot Stuff two side longerons together full length still like apply small fillet Titebond glue balsa joint just diehard May1985 29 Left Lightweight pilot Cpu uee eJecIIn ugats show up nicely inside large canopy Sign reminds judges model Spo should viewed distance Right Large canopy necessitates finished interior Panels match documentation suice text Seat bumps pieces small resistors diodes Hows example creativeness guess Install Former 1 shape engine bearers suit Start planking covering top side longeron piece t balsa approx 1 wide runs front Former 1 way end tail hobby shops now have long balsa ask Next install another 1-in balsa strip along bottom side longeron Hot Stuff former go point fuselage starts curving used -in-wide balsa strips sanded needed get good joint between pieces Hot Stuff works wonders type planking can really get job done fast want use larger pieces will have soak ammonia riibberband place until dry shape dry can trim size glue place Add cockpit floor plan intend finish area elected make canopy interior separate unit finished Ijust glued place glue wing hold-down blocks until wing saddle area com pleted front hold-down bolt can exchanged hole wood dowel arrangement desired would suggest decide what type pushrods intend use can install before planking completed generally use Sullivan GoldN-Rods keep bending install 1/16-in music wire inside center section also helps assure fairly straight run down fuselage Keep music wire about t end make room threaded connectors Make sure anchor Gold-N-Rods formers about 4 keep bending under loads major cause trim changes Before rear planking finished cut out Formers Ri through R5 build vertical fin place Attach another -in balsa strip between top fin Former 11for alignment during final gluing assembly Sand formers good fit leading trailing edge Add planking make smooth joint between fin fuselage planking use resin/microbalboons fillets type Cm strake can either added now later oonvenience rudder assembly made joining perimeter members adding 3/32 balsa pieces between ribs Sand con tour glue set plank 1/16 balsa 7 p Lelt fliS View UflOWB mu uuu6d strake front stabilizer small stabilizer P15165 tne veriicai Tin nigni microballOOns/resin mix 1/64-in plywood base Note flaps extend under wing fillets fUII-uILO plane 30 Model Aviation AUTflO ana ins i uguna unuppag nithe Mint Julep Meet Model did reasonablyweil its first year qualifying compete US Scale Masters held Kansas City MO installation Rhom Air retracts typi cal foam-type wing Landing gear legs 5/32-in music wire covered vari ous parts Robart P-Si gear legs Fliea sanaca ana poiisnea Lucite used wing tip lights tail lights really work being powered nina-volt battery Nice detailing pays off NO OCR TEXT good time cut out stab ribs build stab assembly over plan shown place music wire elevator stiffener shown purchased pre formed Sig connector nylon horn already attached center takes little work use method hides elevator horn within fuselage effort will appreciated later model has completed have built stab elevator set aside until have finished wing Wing Cut out center section tip templates ood have wire foam cutter ask around area someone can help almost sure find someone can cut ask can help youll want get some experience done may wnt make own cutter someday person also will know get required foam can find anyone help companies have advertised magazine offering custom foam cut ting furnish templates money After foam oores posses sion add leading trailing edges Mark accurate centerline through tip front back will use later alignment Make necessary cutouts aile ron bellcrank assemblies make cutouts retract gear assembligs install aileron pushrods make two long parallel cuts t remove foam between Install Gold-NRods glue place Reinstall foam using Titebond glue foam can reused because little pieces forget install soft piece -in balsa Sand flush top foam core glue 3-in sheets 1/16 balsa together form sheet large enough cover side core piece apply balsa skins prefer use Dave Brown Products Southern Sorgum waterbased contact-type adhesive sheet ing careful twist warp core Also sure block up tips wing proper amount washout Vhen adhesive ready set core straight surface Lay sheet balsa core lightly start rubbing sheet oore randomly should happen attach rear trailing edge tip attach leading edge root section oould end up instant warp Before start visualize line running proportionally down core root tip Gently rub fingertips palm down line pro gress toward trailing edge time moving proportionally down core same forward leading edge should end up very straight wing Now can rub down hard using same technique final bond oore same other side method lets put accurate amount washout tip nothing tapered shim tip root under trailing edge two cores complete can joined together 5-mm epoxy would like explain Ijoin wing halves together ensure form true wing straight-flying aircraft building Pattern models learned wing tips must perfectly aligned can get Most kit instructions tell builder align center sections glue point should done because foam cores cut straight root tip joined checking may end up very large propeller-type twisted wing will track wings level through looping maneuver Since wing tips much work during various maneuvers seems tips panel must well aligned j Id N. t5 Ti tart alignment process making centerline tips foam cores Glue piece -in-wide balsa under line dont already have go hardware store purchase two 6-in bubble levels match flat surface sure read same Block up wing tips flat table place level balsa strip tips Keep shimming wing tip until bubbles exactly seine tips alignment may find center sections dont match dont worry about this joint will hidden inside fuselage have seen cores did match center much mbled way Yet finished model flew correctly center joint gluing has cured apply 4-in-wide piece heavy-duty fiberglass along top bottom 32 Model Aviation canopy occupying much fuselage depth still plenty room under servos receiver air tank gearall accessible maintenance Full-Size Plans Available. See Page 172 I1 I-I-Il ~-II L1h~ L / I— L -P ________________II T, 7.II ---S,--_A____ _____________ ____/ ______1__ U 03/3-nw. 3 3 0I23458 1583. EM-5IZ Tucio 1~ 00/ /I /C I3-0fl 1. centerline joint find best use finishing resin application Cut aileron flap parts sheet balsa Sand size rough contour mount wing favorite binges Final-sand ailerons flaps good fit trailing edge Add balsa wing tips final-sand finishing Cover edges retract gent cutouts 1/64 plywood held place 5mm epoxy material forms around wheel circle very easily work grain Add epoxy install nextlarger-size wheel have sitting around wing complete cut sand wing saddles good fit Make sure wing angled correctly shown plans Measure wing tip top vertical fin check wing square fuselage generally use 1/64 plywood base wing fillet add balsa scraps resin/microbal loons finish Install wing hold-down blocks epoxy drill tap assembly wing fuselage Add balsa triangle reinforcing top hold-down blocks additional sup port Cut opening rear fin stabilizer Cut sand fuselage sheeting can align stab wing fin Take time block up fuselage double-measure assure true alignment between wing fin stab Later youll glad took time get right Glue stab place add appropriate resin/microballoon fillets Reinstall fin pieces after elevator hinged stab Install rudder vertical fin basic building assembly oomplete install engine/muffler com bination Most current expansiontype mufflers will fit outside cowl Later installed aDu-Bro Muffle-aire cleaner look nearly quiet expansion-type thats consideration depending upon fly alas contest judges will downgrade muffler showing Add retract gear fuel tank battery preliminary balance check center gravity CG point shown plans model tail-heavy posi tion servos will help offset problem Most battery packs will fit between Formers 6 7 add about ead nose Tucano make balance properly particular model has fairly heavy finish yet weighs 11 lb ready flynot bad considering size model second attempt nearing completion May1985 33 V/ -- 7OOC tN j2 _____I// I-11 _________4 I 2I______________ fjC. written weighing 10 lb no ballast up front Cowl first attempt making fiberglass cowl Once got started really went easy Just remember doesnt look too neat until final sanding has completed Heres process used obtained Styrofoam block cut fit forward part fuselage betwen Formem 1 3 tack-glued place type foam sands easily careful go too fast Sand shape foam fit contoursand flush fuselage planking oomplete remove fuselage very carefully remove additional 1/16 over make up thickness fiberglass will applied Lay up medinm-weight fiberglass over form add finishing resin go used strips about i wide would mold easily around scoop area Let 34 Model Aviation L 5K I, -jj K i~ 12 High seating position full canopy provide visibility Tucano especially good fortralning pilots Models deviation scale isa more-forward nose gear strut Full-Size Plans Available. See Page 172 I II o0 0RI _I 4_____ ____ _____ _________7_ 0-.[v32][b-1-10-1-10]] __________ EMR-32 Tucano 0I2340 ncs first application cure sand rough spots 80-grit paper Cover another layer cloth/resin additional layers until thickness want achieved cowl about 1/16 thick though thicker needs Sand final shape finish Cut gouge out foam shell Add several coats primer fiberglass cowl Lat er can cut air intakes out add other openings glow plug ex haust required very small cutout will needed clear nose gear strut Heated exhaust air will exit through nose gear area Canopy As cowl no canopy can buy model learn form clear plastic material first looked clear plastic object could effort save myself going though big ordeal making canopy After realized no other choice studied problem awhile found particular can opy design relatively easy make because compound curving very slight can make canopy use vacuum-form After reviewing several methods mak ing canopy mold decided just build part fuselage cut loose later use made Formers 6 through 10 full-size planked canopy area time planking rest fuselage tack-glued some alsa pieces along top canopy floor put braces side-to-side former cut through formers along line before completing planking plan right can cut canopy area loose separate unit after sanding filling complete unit plenty strong purpose hot plastic does require lot pressure Make surface smooth can Any bumps seams planking will show up finished canopy applied two separate heavy coats finishing resin sanded unit smooth finishing 400-grit wet sandpaper 0000 steel wool Balsa USA sells plastic canopy material foot low oost Buy enough about three canopies spoil wont have reorder wait arrive Besides once youve completed project will find other things youll want form tacked plastic two pieces hardwood about 1 sq length plastic Place small tacks about apart keep plastic straight staples did hold wood well enough Cut plastic about 3 longer canopy about oven width Arrange form close oven some object will let hands go down over sides form Set oven 450g Mine electric really dont know will work gas May1985 35 1 A_ _U A- St5 F N1-Z Tc&~ oven think out before begin want burn up able finish project Put some gloves protect hands hold plastic wood edges place oven far will go actually heated end awhile switched ends plastic did go way oven plastic will start sag gets hot critical stage will see start smoke little sags andyouwillwant take out Dont Its notready yet Wait until sags about i its hot enough make transfer oven mold cooling off too much ready move mold push plastic stralght down over mold Run hand over sides form will see plastic go right over shape slick whistle Hold position about 30 secuntil plastic cools get plastic hot enough will stretch over mold tried four times before did right Just reheat plastic oven again success air suggest make another will have spare case future accidents paint spills what ever Stand back admire handi work youre like youll glad gave try FinIshing generally use finishing resin appropriate paint first apply oz fiberglass cloth wood resin brushed soldering acid-type brush hard bristles allows brush resin through cloth apply enough resin fill cloth form hard shell wood Excess use such several coats material unneces sary will add weight require much sanding Sand resin 80-grit paper remove lumps bumps Next apply several heavy coats primer dry sand 220-grit paper until final smoothness achieved have good finish coat will needed Sand lightly again Dont pile primer covers model like coat plaster trying level fill grain Primer weighs bunch thats especially harmful way back tail area used K&B white epoxy base coat applied spraying After dry covered model completely Fliteglas Liquid Masking Film great stuff dry can draw designs top felt-tip pen pencil drawing complete cut design lines sharp X-Acto blade lift off portion want color next color has applied has dried reapply LMF over new paint proceed same other colors lettering small insignias Continued page 138 36 Model Aviation Full-Size Plans Available. See Page 172 Tucano afloat few modern aircraft using propeller tricycle gearthat suit able dupiication modei form Great takeoffs andingsmuch iike Pattern ship 1* PLANS * TARBGbY 7 cially Turn-around thin 850 sq in. 120 cycle powered Ron Chidgey design templates computer plotted smooth solid performer Rib Plans construction hints $1 195 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics Its predecess ors Plans construction hInts WELLER 3 BLADE FIBERGLASS PROP proven lh hats Interna tIonal competition 1310 $2000 IVANS MAGIC GADGET protractor device used Ivan Krlatensen accurately measure aileron elevator add rudder throw Takes guess work out trimmIng Out airplane qualIty tool complete Instructions log book carrying case $795 SEE YOUR DEALER OR ORuaK UIRtLI lieve March 1937 plane Frank Tinsley think Loire French gull-wing parasol fightershown rear top quarter climbed toward title have first-issue covers framed am missing father thanks mother thanks thank you. Bill Winter 4432 Altura Ct Fafrfax VA 22030 Editor Bill Winter has granted leave absence producing col unin period time presently determined meantime have hand couple other articles Bill will printed next few months Before anyone jumps wrong conclu sion let make plain hasnt fired arent unhappy him isnt unhappy us let urge readers refrain writing Bill editorial offices about quick resumption Fun column would WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slipfit phenolic sockets build wing structure Now size models 718 die x 3 5 1* die x 2 5 1$ die x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 00s wIth 1ThW reaL bearing Both SLEEVE PULLER 0795for BEARING PULLER -15$1395 TRANSMITTER CASE An ineepensive rugged molded case protect expensIve transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1695 Qator WC Products 3713 PolapaflO Drive P Paniacola FL 3251$ Phone 90$ $76- 8639 INCLUVE $100 PER ITEM FOR UPS counterproductive rl R Wheeley Tucano/Naber Continued page 36 model cut out LMF painted small brush Using method can get correct scale stars bars etc have use closest-available size decals dont need seal painted-on items coat clear decals have mix special color remember keep small amount touch-ups probably will neces sary later Flying past building flying experiences guess have flown ofjust about popular model avail able Yet initial takeoff newly-completed model always have first flight jitters time no different engine running ship sitting end McDonnell-Douglas clubs asphalt run way time comes have advanced throttle power aircraft ran true down runway actually made nice slow takeoff itself due too much up-eleva tor trim After Tucano climbed flight altitude necessary trim abit down-elevator flew model around about six laps field prepared first landing lowered retract gear added about 25% flaps new model like limit first flight takeoff landing know handles well crucial areas nerves relax little can turn attention various other maneuvers following flights Tucano landed just like Curare Pattern airplane say least quite impressed what developed subsequent flights found due basic long moment arrangement flies smoothly nearly responsively Pattern airplane Landings flat true no tendency drop wing tip extremely low landing speeds first three Sport Scale contests entered Tucano static points right up other top models Everyone has seen fly tells impressed Tucano s looks air What could modeler want Buy big bag balsaand happy building Radio Technique/Myers Continued page 39 als Heath catalog changes time time dont hold against product has discontinued Specifically Radio Telephone oper ators license pilot has con fers license use Aviation Band 109135 MHz does permit use Amateur Radio bands George M Myers 70 Froehlich Farm Rd. Hicksville NY 11801 138 ModelAviation . CW f oo Designed Turnaround Pattern 3de~1 dd ~0O O~Gte le5 tB &MODEL AIRCRAFT 9$~ ex w P0 Box 1902 Greenville TX 75401 2144546441 GONTIOLIKI ThU PROFILE0COMBA 7RA T WIDE & NARROW WEDGE 1 5 6 oz Capacities UNIFLOW & STINDD Custom lieu Fuels Ingredients detailed bochur5OC stomps/check CAROLINATAFFINDER 8345 Delhi Road Charleston Hats. SC 29418 3563-7169
Edition: Model Aviation - 1985/05
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 138
The prototype unique two-place turboprop military trainer produced Brazil Ourauthors66-in-span RCSport Scale version 75 engine flies smoothly nearly responsively good Pattern airplane EJoseph R Naber AS MOST model builders inclined sitting work room waiting last coat paint dry latest creation started wonder what should work next Having built previous Scale models tail draggers decided time find suitable subject tricycle gear setup thought would give aging fin gers little help during takeoff landing proce dures may have noticed too noncivilian aircraft around days have tricycle gear also prop-driven thorough review aircraft nth able througn aero uthor learne ri mu abouth linethe books did nothing help matteruntil picked up then-current issue Aircraft International magazine ad Brazilian EMB-31 2 Tucano twin-seat turboprop trainer minute saw photo knew features aircraft wanted build model form wrote sales office listed England several weeks later kind enough send very detailed brochure pictures three-view draw ings After reviewing litera ture knew instantly made right choice EMB-31 2Tucano built EMBRAER Company Brazil designated T 27 Brazilian Air Force tandem-seat trainer pow ered Pratt Whitney PT6A-25C free turbine engine developing 750 static hp driving three-bladed Hartzell propeller Maximum speed 253 knots 291 mph unique incorporating Martin-Baker ejection seats although trainer one-piece canopy hinges side easy entry exit aircraft stressed plus six minus three gravities allowing perform com plete range aerobatic ma neuvers Tucano now being used Brazilian Air Force flight demonstration team very exte tide Tucano January 1983 issue ternational magazine Number 1 last repor copies issue wu able fora accepte Brazil trying sell aircraft other countriesand has sold some Egypt near future should seeing some varied paint schemes modeling use above information developed model plans using projector enlarge three-views size needed influenced several kit models recently built having larger 60 engines wingspans 60 found models flew much nicer models heavier wing loadings used build After examining several wingspan power plant combinations settled 90 engine 68-in wingspan As model developed began feel 90 engine would too powerful changed 75 cu Supertigre has proved very effective has served quite well also know now good 60 engine has plenty power fly aircraftdue models lightness its size its aerodynamically clean configuration proceeded draw up plans adding formers other details required After several preliminary sketches shuffling pieces arrived final setup thought wanted amazing much time can spend deciding several assembly methods use what will give best results efficient use materials simple things take timelike should wing bolted front should dowel-and-hole arrange ment used Consideration radio gear wing construction various other items come play during choice pro cess Ultimately what enjoyable get use construction methods comfortable use materials suit building tech niques best deviation scale make model location nose gear strut Because inverted engine move rearward however nearly noticeable side-mounted-engine alternative would cylinder sticking out breeze elected have retracting landing gear flaps also decided install bomb dropping mechanisms wing pylons however shown plans Construction text written see tightly-cowled engine tur bo exhaust stacks hand-flied alumi num nose gear mounted landing light assumption have varied know ledge building techniques have some familiarity ideas materials used model past square fuselage type model may have trouble aspect unless have some experienced friends can help out hasnt tried build model before knew everything about what doing As matter fact did very thing project learn After reading article through will see will have learn form clear plastic canopy make fiberglass cowl Making items prototype model first time both worked out quite well After reading made canopy mold decide yours same way must adjust cutting fuselage formers include uppermost part formers correct outline canopy shown must make allowance thickness balsa sheeting Len oupenigre uu engine iiueu wuit ier Fiberglass exhaust stacks open engine area allow nested air escape Right Velcro strips hold dummy gas tank wing pylon Music wire pins front rear Velcro assure tank alignment 28 Model Aviation Weii-baianced layout turboprop design makes easy see wny seversi mla-ast countries buying Brazilian Tucano torthelrtralning programs Photos bythe author engine cooling Inlet very effective air goes directly over engines cylin der head Note small hole feed carb NASA scoop glow plug access Fuselage Start cutting out form ers Use medium weight balsa throughout leave heavy stuff hobby shop next guys slab-sided fuselage tail moment long lightness tail area will pay big dividends lessening amount ballast may need nose Formers 1 2 3 4 must reviewed altered necessary suit engine bearer spacing needed particular engine made bearers little oversize could trim suit later time Former 1 must also sized time fit spinner will use use balsa fuel tank com partment floor feel member helps absorb forces forward-mount ed nose landing gear box Use retract gear other type shownwill necessi tate some revision formers mounting box Keep front gear box least Ys engine cylinder proper airflow inside cowling Again adjust fit particular engine muffler Model all-balsa resin base finish Final finish K&B Superpoxy de tailing done use Liquid Masking Film Text detaiisthis quick easytrimming system side view plans note show alsa longerons top bottom fuselage omis sion clarity formers show cuts pieces Before assembly begins mark rear formers pen about de edges After fuselage together almost completely planked can use outline hollow out centers formers lightness after planking completed inner strengthweightis needed Splice /4 sq balsa pieces make correct number longerons will go end fuselage other Glue two /4 sq longerons side Formers 4 5 clamp rubberband together ends keep aligned glue two longerons together time Being sep arate will easier bend curvature fuselage want flexible until tail complete Assemble Formers 2 3 4 5 6 around engine bearers tank bottom Add / sq longeron between Formers 2 6 let overhang Former 2so will support Former 1 later bottom longeron goes long piece back tail timefor alignment pur poses Add Formers 7 through 11 Tackglue place Hot Stuff favorite cyanoacrylate CyA glue CyA glues very useful allowing us build type fuselage internal crutches formerly required straightness during construction use CyA everything should have some hand seem using CyA more because really saves time Add Formers 12 through 18 Add rear top longeron Former 11 tail Tack place let stick out forward past Former 6 Sight down finished unit make sure have just built yourself big balsa banana have shame you rushed Break pieces loose reglue until get right straight should able bend top longeron down touch set Former 6 have everything straight Hot Stuff two side longerons together full length still like apply small fillet Titebond glue balsa joint just diehard May1985 29 Left Lightweight pilot Cpu uee eJecIIn ugats show up nicely inside large canopy Sign reminds judges model Spo should viewed distance Right Large canopy necessitates finished interior Panels match documentation suice text Seat bumps pieces small resistors diodes Hows example creativeness guess Install Former 1 shape engine bearers suit Start planking covering top side longeron piece t balsa approx 1 wide runs front Former 1 way end tail hobby shops now have long balsa ask Next install another 1-in balsa strip along bottom side longeron Hot Stuff former go point fuselage starts curving used -in-wide balsa strips sanded needed get good joint between pieces Hot Stuff works wonders type planking can really get job done fast want use larger pieces will have soak ammonia riibberband place until dry shape dry can trim size glue place Add cockpit floor plan intend finish area elected make canopy interior separate unit finished Ijust glued place glue wing hold-down blocks until wing saddle area com pleted front hold-down bolt can exchanged hole wood dowel arrangement desired would suggest decide what type pushrods intend use can install before planking completed generally use Sullivan GoldN-Rods keep bending install 1/16-in music wire inside center section also helps assure fairly straight run down fuselage Keep music wire about t end make room threaded connectors Make sure anchor Gold-N-Rods formers about 4 keep bending under loads major cause trim changes Before rear planking finished cut out Formers Ri through R5 build vertical fin place Attach another -in balsa strip between top fin Former 11for alignment during final gluing assembly Sand formers good fit leading trailing edge Add planking make smooth joint between fin fuselage planking use resin/microbalboons fillets type Cm strake can either added now later oonvenience rudder assembly made joining perimeter members adding 3/32 balsa pieces between ribs Sand con tour glue set plank 1/16 balsa 7 p Lelt fliS View UflOWB mu uuu6d strake front stabilizer small stabilizer P15165 tne veriicai Tin nigni microballOOns/resin mix 1/64-in plywood base Note flaps extend under wing fillets fUII-uILO plane 30 Model Aviation AUTflO ana ins i uguna unuppag nithe Mint Julep Meet Model did reasonablyweil its first year qualifying compete US Scale Masters held Kansas City MO installation Rhom Air retracts typi cal foam-type wing Landing gear legs 5/32-in music wire covered vari ous parts Robart P-Si gear legs Fliea sanaca ana poiisnea Lucite used wing tip lights tail lights really work being powered nina-volt battery Nice detailing pays off NO OCR TEXT good time cut out stab ribs build stab assembly over plan shown place music wire elevator stiffener shown purchased pre formed Sig connector nylon horn already attached center takes little work use method hides elevator horn within fuselage effort will appreciated later model has completed have built stab elevator set aside until have finished wing Wing Cut out center section tip templates ood have wire foam cutter ask around area someone can help almost sure find someone can cut ask can help youll want get some experience done may wnt make own cutter someday person also will know get required foam can find anyone help companies have advertised magazine offering custom foam cut ting furnish templates money After foam oores posses sion add leading trailing edges Mark accurate centerline through tip front back will use later alignment Make necessary cutouts aile ron bellcrank assemblies make cutouts retract gear assembligs install aileron pushrods make two long parallel cuts t remove foam between Install Gold-NRods glue place Reinstall foam using Titebond glue foam can reused because little pieces forget install soft piece -in balsa Sand flush top foam core glue 3-in sheets 1/16 balsa together form sheet large enough cover side core piece apply balsa skins prefer use Dave Brown Products Southern Sorgum waterbased contact-type adhesive sheet ing careful twist warp core Also sure block up tips wing proper amount washout Vhen adhesive ready set core straight surface Lay sheet balsa core lightly start rubbing sheet oore randomly should happen attach rear trailing edge tip attach leading edge root section oould end up instant warp Before start visualize line running proportionally down core root tip Gently rub fingertips palm down line pro gress toward trailing edge time moving proportionally down core same forward leading edge should end up very straight wing Now can rub down hard using same technique final bond oore same other side method lets put accurate amount washout tip nothing tapered shim tip root under trailing edge two cores complete can joined together 5-mm epoxy would like explain Ijoin wing halves together ensure form true wing straight-flying aircraft building Pattern models learned wing tips must perfectly aligned can get Most kit instructions tell builder align center sections glue point should done because foam cores cut straight root tip joined checking may end up very large propeller-type twisted wing will track wings level through looping maneuver Since wing tips much work during various maneuvers seems tips panel must well aligned j Id N. t5 Ti tart alignment process making centerline tips foam cores Glue piece -in-wide balsa under line dont already have go hardware store purchase two 6-in bubble levels match flat surface sure read same Block up wing tips flat table place level balsa strip tips Keep shimming wing tip until bubbles exactly seine tips alignment may find center sections dont match dont worry about this joint will hidden inside fuselage have seen cores did match center much mbled way Yet finished model flew correctly center joint gluing has cured apply 4-in-wide piece heavy-duty fiberglass along top bottom 32 Model Aviation canopy occupying much fuselage depth still plenty room under servos receiver air tank gearall accessible maintenance Full-Size Plans Available. See Page 172 I1 I-I-Il ~-II L1h~ L / I— L -P ________________II T, 7.II ---S,--_A____ _____________ ____/ ______1__ U 03/3-nw. 3 3 0I23458 1583. EM-5IZ Tucio 1~ 00/ /I /C I3-0fl 1. centerline joint find best use finishing resin application Cut aileron flap parts sheet balsa Sand size rough contour mount wing favorite binges Final-sand ailerons flaps good fit trailing edge Add balsa wing tips final-sand finishing Cover edges retract gent cutouts 1/64 plywood held place 5mm epoxy material forms around wheel circle very easily work grain Add epoxy install nextlarger-size wheel have sitting around wing complete cut sand wing saddles good fit Make sure wing angled correctly shown plans Measure wing tip top vertical fin check wing square fuselage generally use 1/64 plywood base wing fillet add balsa scraps resin/microbal loons finish Install wing hold-down blocks epoxy drill tap assembly wing fuselage Add balsa triangle reinforcing top hold-down blocks additional sup port Cut opening rear fin stabilizer Cut sand fuselage sheeting can align stab wing fin Take time block up fuselage double-measure assure true alignment between wing fin stab Later youll glad took time get right Glue stab place add appropriate resin/microballoon fillets Reinstall fin pieces after elevator hinged stab Install rudder vertical fin basic building assembly oomplete install engine/muffler com bination Most current expansiontype mufflers will fit outside cowl Later installed aDu-Bro Muffle-aire cleaner look nearly quiet expansion-type thats consideration depending upon fly alas contest judges will downgrade muffler showing Add retract gear fuel tank battery preliminary balance check center gravity CG point shown plans model tail-heavy posi tion servos will help offset problem Most battery packs will fit between Formers 6 7 add about ead nose Tucano make balance properly particular model has fairly heavy finish yet weighs 11 lb ready flynot bad considering size model second attempt nearing completion May1985 33 V/ -- 7OOC tN j2 _____I// I-11 _________4 I 2I______________ fjC. written weighing 10 lb no ballast up front Cowl first attempt making fiberglass cowl Once got started really went easy Just remember doesnt look too neat until final sanding has completed Heres process used obtained Styrofoam block cut fit forward part fuselage betwen Formem 1 3 tack-glued place type foam sands easily careful go too fast Sand shape foam fit contoursand flush fuselage planking oomplete remove fuselage very carefully remove additional 1/16 over make up thickness fiberglass will applied Lay up medinm-weight fiberglass over form add finishing resin go used strips about i wide would mold easily around scoop area Let 34 Model Aviation L 5K I, -jj K i~ 12 High seating position full canopy provide visibility Tucano especially good fortralning pilots Models deviation scale isa more-forward nose gear strut Full-Size Plans Available. See Page 172 I II o0 0RI _I 4_____ ____ _____ _________7_ 0-.[v32][b-1-10-1-10]] __________ EMR-32 Tucano 0I2340 ncs first application cure sand rough spots 80-grit paper Cover another layer cloth/resin additional layers until thickness want achieved cowl about 1/16 thick though thicker needs Sand final shape finish Cut gouge out foam shell Add several coats primer fiberglass cowl Lat er can cut air intakes out add other openings glow plug ex haust required very small cutout will needed clear nose gear strut Heated exhaust air will exit through nose gear area Canopy As cowl no canopy can buy model learn form clear plastic material first looked clear plastic object could effort save myself going though big ordeal making canopy After realized no other choice studied problem awhile found particular can opy design relatively easy make because compound curving very slight can make canopy use vacuum-form After reviewing several methods mak ing canopy mold decided just build part fuselage cut loose later use made Formers 6 through 10 full-size planked canopy area time planking rest fuselage tack-glued some alsa pieces along top canopy floor put braces side-to-side former cut through formers along line before completing planking plan right can cut canopy area loose separate unit after sanding filling complete unit plenty strong purpose hot plastic does require lot pressure Make surface smooth can Any bumps seams planking will show up finished canopy applied two separate heavy coats finishing resin sanded unit smooth finishing 400-grit wet sandpaper 0000 steel wool Balsa USA sells plastic canopy material foot low oost Buy enough about three canopies spoil wont have reorder wait arrive Besides once youve completed project will find other things youll want form tacked plastic two pieces hardwood about 1 sq length plastic Place small tacks about apart keep plastic straight staples did hold wood well enough Cut plastic about 3 longer canopy about oven width Arrange form close oven some object will let hands go down over sides form Set oven 450g Mine electric really dont know will work gas May1985 35 1 A_ _U A- St5 F N1-Z Tc&~ oven think out before begin want burn up able finish project Put some gloves protect hands hold plastic wood edges place oven far will go actually heated end awhile switched ends plastic did go way oven plastic will start sag gets hot critical stage will see start smoke little sags andyouwillwant take out Dont Its notready yet Wait until sags about i its hot enough make transfer oven mold cooling off too much ready move mold push plastic stralght down over mold Run hand over sides form will see plastic go right over shape slick whistle Hold position about 30 secuntil plastic cools get plastic hot enough will stretch over mold tried four times before did right Just reheat plastic oven again success air suggest make another will have spare case future accidents paint spills what ever Stand back admire handi work youre like youll glad gave try FinIshing generally use finishing resin appropriate paint first apply oz fiberglass cloth wood resin brushed soldering acid-type brush hard bristles allows brush resin through cloth apply enough resin fill cloth form hard shell wood Excess use such several coats material unneces sary will add weight require much sanding Sand resin 80-grit paper remove lumps bumps Next apply several heavy coats primer dry sand 220-grit paper until final smoothness achieved have good finish coat will needed Sand lightly again Dont pile primer covers model like coat plaster trying level fill grain Primer weighs bunch thats especially harmful way back tail area used K&B white epoxy base coat applied spraying After dry covered model completely Fliteglas Liquid Masking Film great stuff dry can draw designs top felt-tip pen pencil drawing complete cut design lines sharp X-Acto blade lift off portion want color next color has applied has dried reapply LMF over new paint proceed same other colors lettering small insignias Continued page 138 36 Model Aviation Full-Size Plans Available. See Page 172 Tucano afloat few modern aircraft using propeller tricycle gearthat suit able dupiication modei form Great takeoffs andingsmuch iike Pattern ship 1* PLANS * TARBGbY 7 cially Turn-around thin 850 sq in. 120 cycle powered Ron Chidgey design templates computer plotted smooth solid performer Rib Plans construction hints $1 195 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics Its predecess ors Plans construction hInts WELLER 3 BLADE FIBERGLASS PROP proven lh hats Interna tIonal competition 1310 $2000 IVANS MAGIC GADGET protractor device used Ivan Krlatensen accurately measure aileron elevator add rudder throw Takes guess work out trimmIng Out airplane qualIty tool complete Instructions log book carrying case $795 SEE YOUR DEALER OR ORuaK UIRtLI lieve March 1937 plane Frank Tinsley think Loire French gull-wing parasol fightershown rear top quarter climbed toward title have first-issue covers framed am missing father thanks mother thanks thank you. Bill Winter 4432 Altura Ct Fafrfax VA 22030 Editor Bill Winter has granted leave absence producing col unin period time presently determined meantime have hand couple other articles Bill will printed next few months Before anyone jumps wrong conclu sion let make plain hasnt fired arent unhappy him isnt unhappy us let urge readers refrain writing Bill editorial offices about quick resumption Fun column would WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slipfit phenolic sockets build wing structure Now size models 718 die x 3 5 1* die x 2 5 1$ die x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 00s wIth 1ThW reaL bearing Both SLEEVE PULLER 0795for BEARING PULLER -15$1395 TRANSMITTER CASE An ineepensive rugged molded case protect expensIve transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1695 Qator WC Products 3713 PolapaflO Drive P Paniacola FL 3251$ Phone 90$ $76- 8639 INCLUVE $100 PER ITEM FOR UPS counterproductive rl R Wheeley Tucano/Naber Continued page 36 model cut out LMF painted small brush Using method can get correct scale stars bars etc have use closest-available size decals dont need seal painted-on items coat clear decals have mix special color remember keep small amount touch-ups probably will neces sary later Flying past building flying experiences guess have flown ofjust about popular model avail able Yet initial takeoff newly-completed model always have first flight jitters time no different engine running ship sitting end McDonnell-Douglas clubs asphalt run way time comes have advanced throttle power aircraft ran true down runway actually made nice slow takeoff itself due too much up-eleva tor trim After Tucano climbed flight altitude necessary trim abit down-elevator flew model around about six laps field prepared first landing lowered retract gear added about 25% flaps new model like limit first flight takeoff landing know handles well crucial areas nerves relax little can turn attention various other maneuvers following flights Tucano landed just like Curare Pattern airplane say least quite impressed what developed subsequent flights found due basic long moment arrangement flies smoothly nearly responsively Pattern airplane Landings flat true no tendency drop wing tip extremely low landing speeds first three Sport Scale contests entered Tucano static points right up other top models Everyone has seen fly tells impressed Tucano s looks air What could modeler want Buy big bag balsaand happy building Radio Technique/Myers Continued page 39 als Heath catalog changes time time dont hold against product has discontinued Specifically Radio Telephone oper ators license pilot has con fers license use Aviation Band 109135 MHz does permit use Amateur Radio bands George M Myers 70 Froehlich Farm Rd. Hicksville NY 11801 138 ModelAviation . CW f oo Designed Turnaround Pattern 3de~1 dd ~0O O~Gte le5 tB &MODEL AIRCRAFT 9$~ ex w P0 Box 1902 Greenville TX 75401 2144546441 GONTIOLIKI ThU PROFILE0COMBA 7RA T WIDE & NARROW WEDGE 1 5 6 oz Capacities UNIFLOW & STINDD Custom lieu Fuels Ingredients detailed bochur5OC stomps/check CAROLINATAFFINDER 8345 Delhi Road Charleston Hats. SC 29418 3563-7169
Edition: Model Aviation - 1985/05
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 138
The prototype unique two-place turboprop military trainer produced Brazil Ourauthors66-in-span RCSport Scale version 75 engine flies smoothly nearly responsively good Pattern airplane EJoseph R Naber AS MOST model builders inclined sitting work room waiting last coat paint dry latest creation started wonder what should work next Having built previous Scale models tail draggers decided time find suitable subject tricycle gear setup thought would give aging fin gers little help during takeoff landing proce dures may have noticed too noncivilian aircraft around days have tricycle gear also prop-driven thorough review aircraft nth able througn aero uthor learne ri mu abouth linethe books did nothing help matteruntil picked up then-current issue Aircraft International magazine ad Brazilian EMB-31 2 Tucano twin-seat turboprop trainer minute saw photo knew features aircraft wanted build model form wrote sales office listed England several weeks later kind enough send very detailed brochure pictures three-view draw ings After reviewing litera ture knew instantly made right choice EMB-31 2Tucano built EMBRAER Company Brazil designated T 27 Brazilian Air Force tandem-seat trainer pow ered Pratt Whitney PT6A-25C free turbine engine developing 750 static hp driving three-bladed Hartzell propeller Maximum speed 253 knots 291 mph unique incorporating Martin-Baker ejection seats although trainer one-piece canopy hinges side easy entry exit aircraft stressed plus six minus three gravities allowing perform com plete range aerobatic ma neuvers Tucano now being used Brazilian Air Force flight demonstration team very exte tide Tucano January 1983 issue ternational magazine Number 1 last repor copies issue wu able fora accepte Brazil trying sell aircraft other countriesand has sold some Egypt near future should seeing some varied paint schemes modeling use above information developed model plans using projector enlarge three-views size needed influenced several kit models recently built having larger 60 engines wingspans 60 found models flew much nicer models heavier wing loadings used build After examining several wingspan power plant combinations settled 90 engine 68-in wingspan As model developed began feel 90 engine would too powerful changed 75 cu Supertigre has proved very effective has served quite well also know now good 60 engine has plenty power fly aircraftdue models lightness its size its aerodynamically clean configuration proceeded draw up plans adding formers other details required After several preliminary sketches shuffling pieces arrived final setup thought wanted amazing much time can spend deciding several assembly methods use what will give best results efficient use materials simple things take timelike should wing bolted front should dowel-and-hole arrange ment used Consideration radio gear wing construction various other items come play during choice pro cess Ultimately what enjoyable get use construction methods comfortable use materials suit building tech niques best deviation scale make model location nose gear strut Because inverted engine move rearward however nearly noticeable side-mounted-engine alternative would cylinder sticking out breeze elected have retracting landing gear flaps also decided install bomb dropping mechanisms wing pylons however shown plans Construction text written see tightly-cowled engine tur bo exhaust stacks hand-flied alumi num nose gear mounted landing light assumption have varied know ledge building techniques have some familiarity ideas materials used model past square fuselage type model may have trouble aspect unless have some experienced friends can help out hasnt tried build model before knew everything about what doing As matter fact did very thing project learn After reading article through will see will have learn form clear plastic canopy make fiberglass cowl Making items prototype model first time both worked out quite well After reading made canopy mold decide yours same way must adjust cutting fuselage formers include uppermost part formers correct outline canopy shown must make allowance thickness balsa sheeting Len oupenigre uu engine iiueu wuit ier Fiberglass exhaust stacks open engine area allow nested air escape Right Velcro strips hold dummy gas tank wing pylon Music wire pins front rear Velcro assure tank alignment 28 Model Aviation Weii-baianced layout turboprop design makes easy see wny seversi mla-ast countries buying Brazilian Tucano torthelrtralning programs Photos bythe author engine cooling Inlet very effective air goes directly over engines cylin der head Note small hole feed carb NASA scoop glow plug access Fuselage Start cutting out form ers Use medium weight balsa throughout leave heavy stuff hobby shop next guys slab-sided fuselage tail moment long lightness tail area will pay big dividends lessening amount ballast may need nose Formers 1 2 3 4 must reviewed altered necessary suit engine bearer spacing needed particular engine made bearers little oversize could trim suit later time Former 1 must also sized time fit spinner will use use balsa fuel tank com partment floor feel member helps absorb forces forward-mount ed nose landing gear box Use retract gear other type shownwill necessi tate some revision formers mounting box Keep front gear box least Ys engine cylinder proper airflow inside cowling Again adjust fit particular engine muffler Model all-balsa resin base finish Final finish K&B Superpoxy de tailing done use Liquid Masking Film Text detaiisthis quick easytrimming system side view plans note show alsa longerons top bottom fuselage omis sion clarity formers show cuts pieces Before assembly begins mark rear formers pen about de edges After fuselage together almost completely planked can use outline hollow out centers formers lightness after planking completed inner strengthweightis needed Splice /4 sq balsa pieces make correct number longerons will go end fuselage other Glue two /4 sq longerons side Formers 4 5 clamp rubberband together ends keep aligned glue two longerons together time Being sep arate will easier bend curvature fuselage want flexible until tail complete Assemble Formers 2 3 4 5 6 around engine bearers tank bottom Add / sq longeron between Formers 2 6 let overhang Former 2so will support Former 1 later bottom longeron goes long piece back tail timefor alignment pur poses Add Formers 7 through 11 Tackglue place Hot Stuff favorite cyanoacrylate CyA glue CyA glues very useful allowing us build type fuselage internal crutches formerly required straightness during construction use CyA everything should have some hand seem using CyA more because really saves time Add Formers 12 through 18 Add rear top longeron Former 11 tail Tack place let stick out forward past Former 6 Sight down finished unit make sure have just built yourself big balsa banana have shame you rushed Break pieces loose reglue until get right straight should able bend top longeron down touch set Former 6 have everything straight Hot Stuff two side longerons together full length still like apply small fillet Titebond glue balsa joint just diehard May1985 29 Left Lightweight pilot Cpu uee eJecIIn ugats show up nicely inside large canopy Sign reminds judges model Spo should viewed distance Right Large canopy necessitates finished interior Panels match documentation suice text Seat bumps pieces small resistors diodes Hows example creativeness guess Install Former 1 shape engine bearers suit Start planking covering top side longeron piece t balsa approx 1 wide runs front Former 1 way end tail hobby shops now have long balsa ask Next install another 1-in balsa strip along bottom side longeron Hot Stuff former go point fuselage starts curving used -in-wide balsa strips sanded needed get good joint between pieces Hot Stuff works wonders type planking can really get job done fast want use larger pieces will have soak ammonia riibberband place until dry shape dry can trim size glue place Add cockpit floor plan intend finish area elected make canopy interior separate unit finished Ijust glued place glue wing hold-down blocks until wing saddle area com pleted front hold-down bolt can exchanged hole wood dowel arrangement desired would suggest decide what type pushrods intend use can install before planking completed generally use Sullivan GoldN-Rods keep bending install 1/16-in music wire inside center section also helps assure fairly straight run down fuselage Keep music wire about t end make room threaded connectors Make sure anchor Gold-N-Rods formers about 4 keep bending under loads major cause trim changes Before rear planking finished cut out Formers Ri through R5 build vertical fin place Attach another -in balsa strip between top fin Former 11for alignment during final gluing assembly Sand formers good fit leading trailing edge Add planking make smooth joint between fin fuselage planking use resin/microbalboons fillets type Cm strake can either added now later oonvenience rudder assembly made joining perimeter members adding 3/32 balsa pieces between ribs Sand con tour glue set plank 1/16 balsa 7 p Lelt fliS View UflOWB mu uuu6d strake front stabilizer small stabilizer P15165 tne veriicai Tin nigni microballOOns/resin mix 1/64-in plywood base Note flaps extend under wing fillets fUII-uILO plane 30 Model Aviation AUTflO ana ins i uguna unuppag nithe Mint Julep Meet Model did reasonablyweil its first year qualifying compete US Scale Masters held Kansas City MO installation Rhom Air retracts typi cal foam-type wing Landing gear legs 5/32-in music wire covered vari ous parts Robart P-Si gear legs Fliea sanaca ana poiisnea Lucite used wing tip lights tail lights really work being powered nina-volt battery Nice detailing pays off NO OCR TEXT good time cut out stab ribs build stab assembly over plan shown place music wire elevator stiffener shown purchased pre formed Sig connector nylon horn already attached center takes little work use method hides elevator horn within fuselage effort will appreciated later model has completed have built stab elevator set aside until have finished wing Wing Cut out center section tip templates ood have wire foam cutter ask around area someone can help almost sure find someone can cut ask can help youll want get some experience done may wnt make own cutter someday person also will know get required foam can find anyone help companies have advertised magazine offering custom foam cut ting furnish templates money After foam oores posses sion add leading trailing edges Mark accurate centerline through tip front back will use later alignment Make necessary cutouts aile ron bellcrank assemblies make cutouts retract gear assembligs install aileron pushrods make two long parallel cuts t remove foam between Install Gold-NRods glue place Reinstall foam using Titebond glue foam can reused because little pieces forget install soft piece -in balsa Sand flush top foam core glue 3-in sheets 1/16 balsa together form sheet large enough cover side core piece apply balsa skins prefer use Dave Brown Products Southern Sorgum waterbased contact-type adhesive sheet ing careful twist warp core Also sure block up tips wing proper amount washout Vhen adhesive ready set core straight surface Lay sheet balsa core lightly start rubbing sheet oore randomly should happen attach rear trailing edge tip attach leading edge root section oould end up instant warp Before start visualize line running proportionally down core root tip Gently rub fingertips palm down line pro gress toward trailing edge time moving proportionally down core same forward leading edge should end up very straight wing Now can rub down hard using same technique final bond oore same other side method lets put accurate amount washout tip nothing tapered shim tip root under trailing edge two cores complete can joined together 5-mm epoxy would like explain Ijoin wing halves together ensure form true wing straight-flying aircraft building Pattern models learned wing tips must perfectly aligned can get Most kit instructions tell builder align center sections glue point should done because foam cores cut straight root tip joined checking may end up very large propeller-type twisted wing will track wings level through looping maneuver Since wing tips much work during various maneuvers seems tips panel must well aligned j Id N. t5 Ti tart alignment process making centerline tips foam cores Glue piece -in-wide balsa under line dont already have go hardware store purchase two 6-in bubble levels match flat surface sure read same Block up wing tips flat table place level balsa strip tips Keep shimming wing tip until bubbles exactly seine tips alignment may find center sections dont match dont worry about this joint will hidden inside fuselage have seen cores did match center much mbled way Yet finished model flew correctly center joint gluing has cured apply 4-in-wide piece heavy-duty fiberglass along top bottom 32 Model Aviation canopy occupying much fuselage depth still plenty room under servos receiver air tank gearall accessible maintenance Full-Size Plans Available. See Page 172 I1 I-I-Il ~-II L1h~ L / I— L -P ________________II T, 7.II ---S,--_A____ _____________ ____/ ______1__ U 03/3-nw. 3 3 0I23458 1583. EM-5IZ Tucio 1~ 00/ /I /C I3-0fl 1. centerline joint find best use finishing resin application Cut aileron flap parts sheet balsa Sand size rough contour mount wing favorite binges Final-sand ailerons flaps good fit trailing edge Add balsa wing tips final-sand finishing Cover edges retract gent cutouts 1/64 plywood held place 5mm epoxy material forms around wheel circle very easily work grain Add epoxy install nextlarger-size wheel have sitting around wing complete cut sand wing saddles good fit Make sure wing angled correctly shown plans Measure wing tip top vertical fin check wing square fuselage generally use 1/64 plywood base wing fillet add balsa scraps resin/microbal loons finish Install wing hold-down blocks epoxy drill tap assembly wing fuselage Add balsa triangle reinforcing top hold-down blocks additional sup port Cut opening rear fin stabilizer Cut sand fuselage sheeting can align stab wing fin Take time block up fuselage double-measure assure true alignment between wing fin stab Later youll glad took time get right Glue stab place add appropriate resin/microballoon fillets Reinstall fin pieces after elevator hinged stab Install rudder vertical fin basic building assembly oomplete install engine/muffler com bination Most current expansiontype mufflers will fit outside cowl Later installed aDu-Bro Muffle-aire cleaner look nearly quiet expansion-type thats consideration depending upon fly alas contest judges will downgrade muffler showing Add retract gear fuel tank battery preliminary balance check center gravity CG point shown plans model tail-heavy posi tion servos will help offset problem Most battery packs will fit between Formers 6 7 add about ead nose Tucano make balance properly particular model has fairly heavy finish yet weighs 11 lb ready flynot bad considering size model second attempt nearing completion May1985 33 V/ -- 7OOC tN j2 _____I// I-11 _________4 I 2I______________ fjC. written weighing 10 lb no ballast up front Cowl first attempt making fiberglass cowl Once got started really went easy Just remember doesnt look too neat until final sanding has completed Heres process used obtained Styrofoam block cut fit forward part fuselage betwen Formem 1 3 tack-glued place type foam sands easily careful go too fast Sand shape foam fit contoursand flush fuselage planking oomplete remove fuselage very carefully remove additional 1/16 over make up thickness fiberglass will applied Lay up medinm-weight fiberglass over form add finishing resin go used strips about i wide would mold easily around scoop area Let 34 Model Aviation L 5K I, -jj K i~ 12 High seating position full canopy provide visibility Tucano especially good fortralning pilots Models deviation scale isa more-forward nose gear strut Full-Size Plans Available. See Page 172 I II o0 0RI _I 4_____ ____ _____ _________7_ 0-.[v32][b-1-10-1-10]] __________ EMR-32 Tucano 0I2340 ncs first application cure sand rough spots 80-grit paper Cover another layer cloth/resin additional layers until thickness want achieved cowl about 1/16 thick though thicker needs Sand final shape finish Cut gouge out foam shell Add several coats primer fiberglass cowl Lat er can cut air intakes out add other openings glow plug ex haust required very small cutout will needed clear nose gear strut Heated exhaust air will exit through nose gear area Canopy As cowl no canopy can buy model learn form clear plastic material first looked clear plastic object could effort save myself going though big ordeal making canopy After realized no other choice studied problem awhile found particular can opy design relatively easy make because compound curving very slight can make canopy use vacuum-form After reviewing several methods mak ing canopy mold decided just build part fuselage cut loose later use made Formers 6 through 10 full-size planked canopy area time planking rest fuselage tack-glued some alsa pieces along top canopy floor put braces side-to-side former cut through formers along line before completing planking plan right can cut canopy area loose separate unit after sanding filling complete unit plenty strong purpose hot plastic does require lot pressure Make surface smooth can Any bumps seams planking will show up finished canopy applied two separate heavy coats finishing resin sanded unit smooth finishing 400-grit wet sandpaper 0000 steel wool Balsa USA sells plastic canopy material foot low oost Buy enough about three canopies spoil wont have reorder wait arrive Besides once youve completed project will find other things youll want form tacked plastic two pieces hardwood about 1 sq length plastic Place small tacks about apart keep plastic straight staples did hold wood well enough Cut plastic about 3 longer canopy about oven width Arrange form close oven some object will let hands go down over sides form Set oven 450g Mine electric really dont know will work gas May1985 35 1 A_ _U A- St5 F N1-Z Tc&~ oven think out before begin want burn up able finish project Put some gloves protect hands hold plastic wood edges place oven far will go actually heated end awhile switched ends plastic did go way oven plastic will start sag gets hot critical stage will see start smoke little sags andyouwillwant take out Dont Its notready yet Wait until sags about i its hot enough make transfer oven mold cooling off too much ready move mold push plastic stralght down over mold Run hand over sides form will see plastic go right over shape slick whistle Hold position about 30 secuntil plastic cools get plastic hot enough will stretch over mold tried four times before did right Just reheat plastic oven again success air suggest make another will have spare case future accidents paint spills what ever Stand back admire handi work youre like youll glad gave try FinIshing generally use finishing resin appropriate paint first apply oz fiberglass cloth wood resin brushed soldering acid-type brush hard bristles allows brush resin through cloth apply enough resin fill cloth form hard shell wood Excess use such several coats material unneces sary will add weight require much sanding Sand resin 80-grit paper remove lumps bumps Next apply several heavy coats primer dry sand 220-grit paper until final smoothness achieved have good finish coat will needed Sand lightly again Dont pile primer covers model like coat plaster trying level fill grain Primer weighs bunch thats especially harmful way back tail area used K&B white epoxy base coat applied spraying After dry covered model completely Fliteglas Liquid Masking Film great stuff dry can draw designs top felt-tip pen pencil drawing complete cut design lines sharp X-Acto blade lift off portion want color next color has applied has dried reapply LMF over new paint proceed same other colors lettering small insignias Continued page 138 36 Model Aviation Full-Size Plans Available. See Page 172 Tucano afloat few modern aircraft using propeller tricycle gearthat suit able dupiication modei form Great takeoffs andingsmuch iike Pattern ship 1* PLANS * TARBGbY 7 cially Turn-around thin 850 sq in. 120 cycle powered Ron Chidgey design templates computer plotted smooth solid performer Rib Plans construction hints $1 195 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics Its predecess ors Plans construction hInts WELLER 3 BLADE FIBERGLASS PROP proven lh hats Interna tIonal competition 1310 $2000 IVANS MAGIC GADGET protractor device used Ivan Krlatensen accurately measure aileron elevator add rudder throw Takes guess work out trimmIng Out airplane qualIty tool complete Instructions log book carrying case $795 SEE YOUR DEALER OR ORuaK UIRtLI lieve March 1937 plane Frank Tinsley think Loire French gull-wing parasol fightershown rear top quarter climbed toward title have first-issue covers framed am missing father thanks mother thanks thank you. Bill Winter 4432 Altura Ct Fafrfax VA 22030 Editor Bill Winter has granted leave absence producing col unin period time presently determined meantime have hand couple other articles Bill will printed next few months Before anyone jumps wrong conclu sion let make plain hasnt fired arent unhappy him isnt unhappy us let urge readers refrain writing Bill editorial offices about quick resumption Fun column would WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slipfit phenolic sockets build wing structure Now size models 718 die x 3 5 1* die x 2 5 1$ die x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 00s wIth 1ThW reaL bearing Both SLEEVE PULLER 0795for BEARING PULLER -15$1395 TRANSMITTER CASE An ineepensive rugged molded case protect expensIve transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1695 Qator WC Products 3713 PolapaflO Drive P Paniacola FL 3251$ Phone 90$ $76- 8639 INCLUVE $100 PER ITEM FOR UPS counterproductive rl R Wheeley Tucano/Naber Continued page 36 model cut out LMF painted small brush Using method can get correct scale stars bars etc have use closest-available size decals dont need seal painted-on items coat clear decals have mix special color remember keep small amount touch-ups probably will neces sary later Flying past building flying experiences guess have flown ofjust about popular model avail able Yet initial takeoff newly-completed model always have first flight jitters time no different engine running ship sitting end McDonnell-Douglas clubs asphalt run way time comes have advanced throttle power aircraft ran true down runway actually made nice slow takeoff itself due too much up-eleva tor trim After Tucano climbed flight altitude necessary trim abit down-elevator flew model around about six laps field prepared first landing lowered retract gear added about 25% flaps new model like limit first flight takeoff landing know handles well crucial areas nerves relax little can turn attention various other maneuvers following flights Tucano landed just like Curare Pattern airplane say least quite impressed what developed subsequent flights found due basic long moment arrangement flies smoothly nearly responsively Pattern airplane Landings flat true no tendency drop wing tip extremely low landing speeds first three Sport Scale contests entered Tucano static points right up other top models Everyone has seen fly tells impressed Tucano s looks air What could modeler want Buy big bag balsaand happy building Radio Technique/Myers Continued page 39 als Heath catalog changes time time dont hold against product has discontinued Specifically Radio Telephone oper ators license pilot has con fers license use Aviation Band 109135 MHz does permit use Amateur Radio bands George M Myers 70 Froehlich Farm Rd. Hicksville NY 11801 138 ModelAviation . CW f oo Designed Turnaround Pattern 3de~1 dd ~0O O~Gte le5 tB &MODEL AIRCRAFT 9$~ ex w P0 Box 1902 Greenville TX 75401 2144546441 GONTIOLIKI ThU PROFILE0COMBA 7RA T WIDE & NARROW WEDGE 1 5 6 oz Capacities UNIFLOW & STINDD Custom lieu Fuels Ingredients detailed bochur5OC stomps/check CAROLINATAFFINDER 8345 Delhi Road Charleston Hats. SC 29418 3563-7169
Edition: Model Aviation - 1985/05
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 138
The prototype unique two-place turboprop military trainer produced Brazil Ourauthors66-in-span RCSport Scale version 75 engine flies smoothly nearly responsively good Pattern airplane EJoseph R Naber AS MOST model builders inclined sitting work room waiting last coat paint dry latest creation started wonder what should work next Having built previous Scale models tail draggers decided time find suitable subject tricycle gear setup thought would give aging fin gers little help during takeoff landing proce dures may have noticed too noncivilian aircraft around days have tricycle gear also prop-driven thorough review aircraft nth able througn aero uthor learne ri mu abouth linethe books did nothing help matteruntil picked up then-current issue Aircraft International magazine ad Brazilian EMB-31 2 Tucano twin-seat turboprop trainer minute saw photo knew features aircraft wanted build model form wrote sales office listed England several weeks later kind enough send very detailed brochure pictures three-view draw ings After reviewing litera ture knew instantly made right choice EMB-31 2Tucano built EMBRAER Company Brazil designated T 27 Brazilian Air Force tandem-seat trainer pow ered Pratt Whitney PT6A-25C free turbine engine developing 750 static hp driving three-bladed Hartzell propeller Maximum speed 253 knots 291 mph unique incorporating Martin-Baker ejection seats although trainer one-piece canopy hinges side easy entry exit aircraft stressed plus six minus three gravities allowing perform com plete range aerobatic ma neuvers Tucano now being used Brazilian Air Force flight demonstration team very exte tide Tucano January 1983 issue ternational magazine Number 1 last repor copies issue wu able fora accepte Brazil trying sell aircraft other countriesand has sold some Egypt near future should seeing some varied paint schemes modeling use above information developed model plans using projector enlarge three-views size needed influenced several kit models recently built having larger 60 engines wingspans 60 found models flew much nicer models heavier wing loadings used build After examining several wingspan power plant combinations settled 90 engine 68-in wingspan As model developed began feel 90 engine would too powerful changed 75 cu Supertigre has proved very effective has served quite well also know now good 60 engine has plenty power fly aircraftdue models lightness its size its aerodynamically clean configuration proceeded draw up plans adding formers other details required After several preliminary sketches shuffling pieces arrived final setup thought wanted amazing much time can spend deciding several assembly methods use what will give best results efficient use materials simple things take timelike should wing bolted front should dowel-and-hole arrange ment used Consideration radio gear wing construction various other items come play during choice pro cess Ultimately what enjoyable get use construction methods comfortable use materials suit building tech niques best deviation scale make model location nose gear strut Because inverted engine move rearward however nearly noticeable side-mounted-engine alternative would cylinder sticking out breeze elected have retracting landing gear flaps also decided install bomb dropping mechanisms wing pylons however shown plans Construction text written see tightly-cowled engine tur bo exhaust stacks hand-flied alumi num nose gear mounted landing light assumption have varied know ledge building techniques have some familiarity ideas materials used model past square fuselage type model may have trouble aspect unless have some experienced friends can help out hasnt tried build model before knew everything about what doing As matter fact did very thing project learn After reading article through will see will have learn form clear plastic canopy make fiberglass cowl Making items prototype model first time both worked out quite well After reading made canopy mold decide yours same way must adjust cutting fuselage formers include uppermost part formers correct outline canopy shown must make allowance thickness balsa sheeting Len oupenigre uu engine iiueu wuit ier Fiberglass exhaust stacks open engine area allow nested air escape Right Velcro strips hold dummy gas tank wing pylon Music wire pins front rear Velcro assure tank alignment 28 Model Aviation Weii-baianced layout turboprop design makes easy see wny seversi mla-ast countries buying Brazilian Tucano torthelrtralning programs Photos bythe author engine cooling Inlet very effective air goes directly over engines cylin der head Note small hole feed carb NASA scoop glow plug access Fuselage Start cutting out form ers Use medium weight balsa throughout leave heavy stuff hobby shop next guys slab-sided fuselage tail moment long lightness tail area will pay big dividends lessening amount ballast may need nose Formers 1 2 3 4 must reviewed altered necessary suit engine bearer spacing needed particular engine made bearers little oversize could trim suit later time Former 1 must also sized time fit spinner will use use balsa fuel tank com partment floor feel member helps absorb forces forward-mount ed nose landing gear box Use retract gear other type shownwill necessi tate some revision formers mounting box Keep front gear box least Ys engine cylinder proper airflow inside cowling Again adjust fit particular engine muffler Model all-balsa resin base finish Final finish K&B Superpoxy de tailing done use Liquid Masking Film Text detaiisthis quick easytrimming system side view plans note show alsa longerons top bottom fuselage omis sion clarity formers show cuts pieces Before assembly begins mark rear formers pen about de edges After fuselage together almost completely planked can use outline hollow out centers formers lightness after planking completed inner strengthweightis needed Splice /4 sq balsa pieces make correct number longerons will go end fuselage other Glue two /4 sq longerons side Formers 4 5 clamp rubberband together ends keep aligned glue two longerons together time Being sep arate will easier bend curvature fuselage want flexible until tail complete Assemble Formers 2 3 4 5 6 around engine bearers tank bottom Add / sq longeron between Formers 2 6 let overhang Former 2so will support Former 1 later bottom longeron goes long piece back tail timefor alignment pur poses Add Formers 7 through 11 Tackglue place Hot Stuff favorite cyanoacrylate CyA glue CyA glues very useful allowing us build type fuselage internal crutches formerly required straightness during construction use CyA everything should have some hand seem using CyA more because really saves time Add Formers 12 through 18 Add rear top longeron Former 11 tail Tack place let stick out forward past Former 6 Sight down finished unit make sure have just built yourself big balsa banana have shame you rushed Break pieces loose reglue until get right straight should able bend top longeron down touch set Former 6 have everything straight Hot Stuff two side longerons together full length still like apply small fillet Titebond glue balsa joint just diehard May1985 29 Left Lightweight pilot Cpu uee eJecIIn ugats show up nicely inside large canopy Sign reminds judges model Spo should viewed distance Right Large canopy necessitates finished interior Panels match documentation suice text Seat bumps pieces small resistors diodes Hows example creativeness guess Install Former 1 shape engine bearers suit Start planking covering top side longeron piece t balsa approx 1 wide runs front Former 1 way end tail hobby shops now have long balsa ask Next install another 1-in balsa strip along bottom side longeron Hot Stuff former go point fuselage starts curving used -in-wide balsa strips sanded needed get good joint between pieces Hot Stuff works wonders type planking can really get job done fast want use larger pieces will have soak ammonia riibberband place until dry shape dry can trim size glue place Add cockpit floor plan intend finish area elected make canopy interior separate unit finished Ijust glued place glue wing hold-down blocks until wing saddle area com pleted front hold-down bolt can exchanged hole wood dowel arrangement desired would suggest decide what type pushrods intend use can install before planking completed generally use Sullivan GoldN-Rods keep bending install 1/16-in music wire inside center section also helps assure fairly straight run down fuselage Keep music wire about t end make room threaded connectors Make sure anchor Gold-N-Rods formers about 4 keep bending under loads major cause trim changes Before rear planking finished cut out Formers Ri through R5 build vertical fin place Attach another -in balsa strip between top fin Former 11for alignment during final gluing assembly Sand formers good fit leading trailing edge Add planking make smooth joint between fin fuselage planking use resin/microbalboons fillets type Cm strake can either added now later oonvenience rudder assembly made joining perimeter members adding 3/32 balsa pieces between ribs Sand con tour glue set plank 1/16 balsa 7 p Lelt fliS View UflOWB mu uuu6d strake front stabilizer small stabilizer P15165 tne veriicai Tin nigni microballOOns/resin mix 1/64-in plywood base Note flaps extend under wing fillets fUII-uILO plane 30 Model Aviation AUTflO ana ins i uguna unuppag nithe Mint Julep Meet Model did reasonablyweil its first year qualifying compete US Scale Masters held Kansas City MO installation Rhom Air retracts typi cal foam-type wing Landing gear legs 5/32-in music wire covered vari ous parts Robart P-Si gear legs Fliea sanaca ana poiisnea Lucite used wing tip lights tail lights really work being powered nina-volt battery Nice detailing pays off NO OCR TEXT good time cut out stab ribs build stab assembly over plan shown place music wire elevator stiffener shown purchased pre formed Sig connector nylon horn already attached center takes little work use method hides elevator horn within fuselage effort will appreciated later model has completed have built stab elevator set aside until have finished wing Wing Cut out center section tip templates ood have wire foam cutter ask around area someone can help almost sure find someone can cut ask can help youll want get some experience done may wnt make own cutter someday person also will know get required foam can find anyone help companies have advertised magazine offering custom foam cut ting furnish templates money After foam oores posses sion add leading trailing edges Mark accurate centerline through tip front back will use later alignment Make necessary cutouts aile ron bellcrank assemblies make cutouts retract gear assembligs install aileron pushrods make two long parallel cuts t remove foam between Install Gold-NRods glue place Reinstall foam using Titebond glue foam can reused because little pieces forget install soft piece -in balsa Sand flush top foam core glue 3-in sheets 1/16 balsa together form sheet large enough cover side core piece apply balsa skins prefer use Dave Brown Products Southern Sorgum waterbased contact-type adhesive sheet ing careful twist warp core Also sure block up tips wing proper amount washout Vhen adhesive ready set core straight surface Lay sheet balsa core lightly start rubbing sheet oore randomly should happen attach rear trailing edge tip attach leading edge root section oould end up instant warp Before start visualize line running proportionally down core root tip Gently rub fingertips palm down line pro gress toward trailing edge time moving proportionally down core same forward leading edge should end up very straight wing Now can rub down hard using same technique final bond oore same other side method lets put accurate amount washout tip nothing tapered shim tip root under trailing edge two cores complete can joined together 5-mm epoxy would like explain Ijoin wing halves together ensure form true wing straight-flying aircraft building Pattern models learned wing tips must perfectly aligned can get Most kit instructions tell builder align center sections glue point should done because foam cores cut straight root tip joined checking may end up very large propeller-type twisted wing will track wings level through looping maneuver Since wing tips much work during various maneuvers seems tips panel must well aligned j Id N. t5 Ti tart alignment process making centerline tips foam cores Glue piece -in-wide balsa under line dont already have go hardware store purchase two 6-in bubble levels match flat surface sure read same Block up wing tips flat table place level balsa strip tips Keep shimming wing tip until bubbles exactly seine tips alignment may find center sections dont match dont worry about this joint will hidden inside fuselage have seen cores did match center much mbled way Yet finished model flew correctly center joint gluing has cured apply 4-in-wide piece heavy-duty fiberglass along top bottom 32 Model Aviation canopy occupying much fuselage depth still plenty room under servos receiver air tank gearall accessible maintenance Full-Size Plans Available. See Page 172 I1 I-I-Il ~-II L1h~ L / I— L -P ________________II T, 7.II ---S,--_A____ _____________ ____/ ______1__ U 03/3-nw. 3 3 0I23458 1583. EM-5IZ Tucio 1~ 00/ /I /C I3-0fl 1. centerline joint find best use finishing resin application Cut aileron flap parts sheet balsa Sand size rough contour mount wing favorite binges Final-sand ailerons flaps good fit trailing edge Add balsa wing tips final-sand finishing Cover edges retract gent cutouts 1/64 plywood held place 5mm epoxy material forms around wheel circle very easily work grain Add epoxy install nextlarger-size wheel have sitting around wing complete cut sand wing saddles good fit Make sure wing angled correctly shown plans Measure wing tip top vertical fin check wing square fuselage generally use 1/64 plywood base wing fillet add balsa scraps resin/microbal loons finish Install wing hold-down blocks epoxy drill tap assembly wing fuselage Add balsa triangle reinforcing top hold-down blocks additional sup port Cut opening rear fin stabilizer Cut sand fuselage sheeting can align stab wing fin Take time block up fuselage double-measure assure true alignment between wing fin stab Later youll glad took time get right Glue stab place add appropriate resin/microballoon fillets Reinstall fin pieces after elevator hinged stab Install rudder vertical fin basic building assembly oomplete install engine/muffler com bination Most current expansiontype mufflers will fit outside cowl Later installed aDu-Bro Muffle-aire cleaner look nearly quiet expansion-type thats consideration depending upon fly alas contest judges will downgrade muffler showing Add retract gear fuel tank battery preliminary balance check center gravity CG point shown plans model tail-heavy posi tion servos will help offset problem Most battery packs will fit between Formers 6 7 add about ead nose Tucano make balance properly particular model has fairly heavy finish yet weighs 11 lb ready flynot bad considering size model second attempt nearing completion May1985 33 V/ -- 7OOC tN j2 _____I// I-11 _________4 I 2I______________ fjC. written weighing 10 lb no ballast up front Cowl first attempt making fiberglass cowl Once got started really went easy Just remember doesnt look too neat until final sanding has completed Heres process used obtained Styrofoam block cut fit forward part fuselage betwen Formem 1 3 tack-glued place type foam sands easily careful go too fast Sand shape foam fit contoursand flush fuselage planking oomplete remove fuselage very carefully remove additional 1/16 over make up thickness fiberglass will applied Lay up medinm-weight fiberglass over form add finishing resin go used strips about i wide would mold easily around scoop area Let 34 Model Aviation L 5K I, -jj K i~ 12 High seating position full canopy provide visibility Tucano especially good fortralning pilots Models deviation scale isa more-forward nose gear strut Full-Size Plans Available. See Page 172 I II o0 0RI _I 4_____ ____ _____ _________7_ 0-.[v32][b-1-10-1-10]] __________ EMR-32 Tucano 0I2340 ncs first application cure sand rough spots 80-grit paper Cover another layer cloth/resin additional layers until thickness want achieved cowl about 1/16 thick though thicker needs Sand final shape finish Cut gouge out foam shell Add several coats primer fiberglass cowl Lat er can cut air intakes out add other openings glow plug ex haust required very small cutout will needed clear nose gear strut Heated exhaust air will exit through nose gear area Canopy As cowl no canopy can buy model learn form clear plastic material first looked clear plastic object could effort save myself going though big ordeal making canopy After realized no other choice studied problem awhile found particular can opy design relatively easy make because compound curving very slight can make canopy use vacuum-form After reviewing several methods mak ing canopy mold decided just build part fuselage cut loose later use made Formers 6 through 10 full-size planked canopy area time planking rest fuselage tack-glued some alsa pieces along top canopy floor put braces side-to-side former cut through formers along line before completing planking plan right can cut canopy area loose separate unit after sanding filling complete unit plenty strong purpose hot plastic does require lot pressure Make surface smooth can Any bumps seams planking will show up finished canopy applied two separate heavy coats finishing resin sanded unit smooth finishing 400-grit wet sandpaper 0000 steel wool Balsa USA sells plastic canopy material foot low oost Buy enough about three canopies spoil wont have reorder wait arrive Besides once youve completed project will find other things youll want form tacked plastic two pieces hardwood about 1 sq length plastic Place small tacks about apart keep plastic straight staples did hold wood well enough Cut plastic about 3 longer canopy about oven width Arrange form close oven some object will let hands go down over sides form Set oven 450g Mine electric really dont know will work gas May1985 35 1 A_ _U A- St5 F N1-Z Tc&~ oven think out before begin want burn up able finish project Put some gloves protect hands hold plastic wood edges place oven far will go actually heated end awhile switched ends plastic did go way oven plastic will start sag gets hot critical stage will see start smoke little sags andyouwillwant take out Dont Its notready yet Wait until sags about i its hot enough make transfer oven mold cooling off too much ready move mold push plastic stralght down over mold Run hand over sides form will see plastic go right over shape slick whistle Hold position about 30 secuntil plastic cools get plastic hot enough will stretch over mold tried four times before did right Just reheat plastic oven again success air suggest make another will have spare case future accidents paint spills what ever Stand back admire handi work youre like youll glad gave try FinIshing generally use finishing resin appropriate paint first apply oz fiberglass cloth wood resin brushed soldering acid-type brush hard bristles allows brush resin through cloth apply enough resin fill cloth form hard shell wood Excess use such several coats material unneces sary will add weight require much sanding Sand resin 80-grit paper remove lumps bumps Next apply several heavy coats primer dry sand 220-grit paper until final smoothness achieved have good finish coat will needed Sand lightly again Dont pile primer covers model like coat plaster trying level fill grain Primer weighs bunch thats especially harmful way back tail area used K&B white epoxy base coat applied spraying After dry covered model completely Fliteglas Liquid Masking Film great stuff dry can draw designs top felt-tip pen pencil drawing complete cut design lines sharp X-Acto blade lift off portion want color next color has applied has dried reapply LMF over new paint proceed same other colors lettering small insignias Continued page 138 36 Model Aviation Full-Size Plans Available. See Page 172 Tucano afloat few modern aircraft using propeller tricycle gearthat suit able dupiication modei form Great takeoffs andingsmuch iike Pattern ship 1* PLANS * TARBGbY 7 cially Turn-around thin 850 sq in. 120 cycle powered Ron Chidgey design templates computer plotted smooth solid performer Rib Plans construction hints $1 195 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics Its predecess ors Plans construction hInts WELLER 3 BLADE FIBERGLASS PROP proven lh hats Interna tIonal competition 1310 $2000 IVANS MAGIC GADGET protractor device used Ivan Krlatensen accurately measure aileron elevator add rudder throw Takes guess work out trimmIng Out airplane qualIty tool complete Instructions log book carrying case $795 SEE YOUR DEALER OR ORuaK UIRtLI lieve March 1937 plane Frank Tinsley think Loire French gull-wing parasol fightershown rear top quarter climbed toward title have first-issue covers framed am missing father thanks mother thanks thank you. Bill Winter 4432 Altura Ct Fafrfax VA 22030 Editor Bill Winter has granted leave absence producing col unin period time presently determined meantime have hand couple other articles Bill will printed next few months Before anyone jumps wrong conclu sion let make plain hasnt fired arent unhappy him isnt unhappy us let urge readers refrain writing Bill editorial offices about quick resumption Fun column would WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slipfit phenolic sockets build wing structure Now size models 718 die x 3 5 1* die x 2 5 1$ die x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 00s wIth 1ThW reaL bearing Both SLEEVE PULLER 0795for BEARING PULLER -15$1395 TRANSMITTER CASE An ineepensive rugged molded case protect expensIve transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1695 Qator WC Products 3713 PolapaflO Drive P Paniacola FL 3251$ Phone 90$ $76- 8639 INCLUVE $100 PER ITEM FOR UPS counterproductive rl R Wheeley Tucano/Naber Continued page 36 model cut out LMF painted small brush Using method can get correct scale stars bars etc have use closest-available size decals dont need seal painted-on items coat clear decals have mix special color remember keep small amount touch-ups probably will neces sary later Flying past building flying experiences guess have flown ofjust about popular model avail able Yet initial takeoff newly-completed model always have first flight jitters time no different engine running ship sitting end McDonnell-Douglas clubs asphalt run way time comes have advanced throttle power aircraft ran true down runway actually made nice slow takeoff itself due too much up-eleva tor trim After Tucano climbed flight altitude necessary trim abit down-elevator flew model around about six laps field prepared first landing lowered retract gear added about 25% flaps new model like limit first flight takeoff landing know handles well crucial areas nerves relax little can turn attention various other maneuvers following flights Tucano landed just like Curare Pattern airplane say least quite impressed what developed subsequent flights found due basic long moment arrangement flies smoothly nearly responsively Pattern airplane Landings flat true no tendency drop wing tip extremely low landing speeds first three Sport Scale contests entered Tucano static points right up other top models Everyone has seen fly tells impressed Tucano s looks air What could modeler want Buy big bag balsaand happy building Radio Technique/Myers Continued page 39 als Heath catalog changes time time dont hold against product has discontinued Specifically Radio Telephone oper ators license pilot has con fers license use Aviation Band 109135 MHz does permit use Amateur Radio bands George M Myers 70 Froehlich Farm Rd. Hicksville NY 11801 138 ModelAviation . CW f oo Designed Turnaround Pattern 3de~1 dd ~0O O~Gte le5 tB &MODEL AIRCRAFT 9$~ ex w P0 Box 1902 Greenville TX 75401 2144546441 GONTIOLIKI ThU PROFILE0COMBA 7RA T WIDE & NARROW WEDGE 1 5 6 oz Capacities UNIFLOW & STINDD Custom lieu Fuels Ingredients detailed bochur5OC stomps/check CAROLINATAFFINDER 8345 Delhi Road Charleston Hats. SC 29418 3563-7169