NO OCR TEXT THE Invader has flying four years now beginning much simpler sailplane same basic design MK IV has gone through four stages develop ment better performance structural strength until now what believe super competition sailplane will take Preceding page Beautiful young lady Herbs daughter Christine Martin beautiful sailplane azure skies snowcapped peaks Colorado Rockies delightful photo other pictures Maurice Kaiser punishment can give Its 1978 performance speaks itself have flown itto become 1978 Rocky Moun tain Soaring Association club champion attained rank Master Flyer 1st place 1978 LSF Regional Tournament 8th place FM USA Team Selection finals 1st place four RMSA AMA contests 1st place Pikes Peak RC contest several 2nd places has competition host formidable opponents RMSA including Skip Miller mention 40 best Pensacola initial concept came about through evaluation contest tasks both AMA FAI goal being design sail plane capable performing well tasks weather conditions boiled down five requirements must light-air floater must super strong must fast speed tasks must able penetrate wind have good L/D ratio distance thermal 66 Model Aviation Construction poly break before top sheeting has bean added Compare plan top view sea spar cross sections along plan top construction wing root before top sheeting ply pieces three glass tubee spar locked togetherrubber hook just aft Attop lathe basic frame ruddernote sturdy hinging arrangement mount small fin Below half all-flying stab servo rail arrangement shown detailed plan Rails spruce laminated ply cross pieces Servo positions throws given Convenient-to-use ballast tubes rest spruce cradle seen three circular openings just above two hookthis captured Fin ruggedly built tuselage plans OCtIl uaisa Talring blocks minimize disturbed air fin/stabilizer junction Rudder clevis shows FULL SIZE PLANS AVAILABLE. SEE PAGE 128 _-_ _I_ _ _ _ ___ _ _1_J88848~ jJ _ _ _K L4 INVADER MK N S 888888888 88888C838008T880888880888 OS 880888 888 888 8 8 888888 8A880C8808/8O8C7y8--- 8- 8NE8O8 88888B SO-IS88888 8083888888888808 88888888 51188 88888080888888 -8888888V888f} 848888888884 8 88 8 8888888 88888 L8888888888J ffl882c888 88 83V888888880~ INVADER MK& hunting ribs plus 1/16 sheeting entire wing altitude high-speed dives fear accomplished starting virtually bullet-proofflutter full flap spoilers can super clean airframe speed LID course beef adds weightbe brought down moderate dive low ratio Large flaps change airfoil camberwhich ends up 85 oz per sq ft wingspeed Getting down never problem full-flying stab change angle attackloading have found simply makes MK IV free flight must floating light air As strength thethe plane fly faster lets airfoil workbe flown time except super calm entire sailplane just strong Especi-at higher Reynolds number rate itair mainly because reacts slightest ally wing has super sparis still floaterdisturbance air still very stable diagonal ribbing addition conventional MK IV can brought down fromespecially very high speeds very August 1979 67 Spoiler wade snown enenaea Iross section aT spoiler detail plans shows actuation methodfitting under spoiler may seen picture wing panel joins fuselage Note generous flap left picture Combo flap flying tail broadens performance range respon Flowris very docile siinter mediate competition sa Try snap roll just give full ups hold let wh fun barrel mor Instructioni Fin Rudder Assemble spars hinge assembly 1 Rudder sparsi18 X 1/4 spruce 2 pieces Notch hinge tab tions spars contact c hinge tabs sandwiched between 2 Fin spars 2 spruce 2 pieces Same step 3 Dry-run-assemble fin spar rudder spar hinges 3/32 piano wire hinge pin place Clamp together Check hinge positions free movement satis fied epoxy 5 minutes slow dry spar hinge units being careful get epoxy hinge bearings Note Some hinge holes tighter others may necessitate making pin smaller chuck pm drill polish down using 400 320 wet dry paper Carve clearance opposite hinge bosses fin rudder spars 4 Assemble fin first Put wax paper plan Assemble inner frame first consists fin/spar hinge assembly bottom X ce piece 3/32 hole drilled position shown control cable housing accurately possible location hole 3 pieces alsa Epoxy unit together wipe excess off top sticks B Remove plan dry add thick balsa fillet front fin airfoil time C Trim top hinge tab clear stab hinge tube trying 1/32 plywood side brass tube through hole Trim sand top edges 1/32 plywood sides align top stab boss comparing plan brass tube through hole both side pieces alignment neutral position stab D Rough outer stab cable housing areas epoxy 4 spruce top housing exact and exact contour shown un balsa stick needed -dry-assemble two ass tube place against fin vi through vood su h 1 thinly dure extenos w two ways F wo stab boss leu stab hinge tube sure hole 5/16 sides boss Glue both parts ii being careful make top parallel ood G Sheet fin above stab 1/16 balsa Cut radius slot front stab rod brass tube 1 radius rear hinge hole Allow full el way After stab assembled check moves freely necessary widen radius slot H Airfoil leading edge fix fuselage time Will covered fuselage instructions Rudder 1 Cover plan wax paper 2 Make shims shown right ruddi 4 Pin down TE shims shown being sure 1/32 pad 1/16 inside rear plan shown 5 Cut TE stock top piece pin glue place Trim top piece after rudder removed plan 6 Cut remaining perimeter sticks pin place using proper shims glue Note 1/8 X 3/16 stick just above fin should fit around hinge boss epoxied along gusset 7 Cut fit glue diagonal rib sticks being sure use shims under end 8 Remove plan cut two pieces pruce control horn boss Notch inside slightly two pieces will andwich over hinge tab epoxy plan wax E stock4pcstofit s 1/32 base type Pin glue TE place ut pin glue LE tip pieces Use 1/32 shims under LE 3 Cut two pieces 1/8 X 3/16 balsa about 3 long Stack together mark hole locations too far end 1 center-to-center dimensions should accurate possible Holes should cen tered stick drilled square through sticks Mark top sticks keep inverting assembly still pinned together trim ends position holes correct distance end glue place time 4 Squeeze s tubes about pliersvery slightly File sand radius ends stab rods push through tube until will push through snugly Remember will two rods place assembly therefore twice hold ing power keep stab rods 5 Insert brass tubes drilled sticks squeezed ends outboard check alignment sure ends tubes flush sticks pin glue assembly place holes well centered sticks place 1/32 shim under outboard ends tubes sure tubes square plan parallel 6 Cut two 1/8 X 3/16 balsa sticks butt outboard ends tubes glue place Cut 4 pieces 1/8 X 3/16 balsa fit along 68 Model Aviation control horn position bottom rudder e line up control r e should ce n ton glue 11 Fi1 sande stick plan 3 Pin rudder spar hinge assembly place fiat plan establishes center line e plan Behind recelverand batterythe fourservos oompactiyarrangedagain check rail planform detail top L R rudder fiap servos bottom L R Stab spoilerltow hook servos tide o epoxy entire stress e 1/16 X 3/16 cross place flat plan rners - ut 1/16 spars piec shape desired cross sticks 1/16 sq balsa sanded sym Lrical airfoil 11 Radius LE finish-sand covering Fuselage 1 Drill file elongated slot left rear side wing boss permit entry spruce cross brace Insert spruce through slot until butts opposite side mark stick Remove cut notch 3/16 deep about 1/32 inside mark re-insert stick check length Trim fit until will bear against both sides Epoxy place after set cut off flush wing boss 2 Rough 3/32 X 2-9/16 brass tube corner file epoxy rear wing rod hole Install two fiberglass tubes epoxy prom inside Cutandfit X cecrossbraceat wing boss Keep high location r clear spoiler pull Epoxy assembly Use acid horn 3/32 X fl centerline neces t bolt tuuCs Sc prevent B Snap ends brass tube fuselage Use 1 guide through fuselage hole bly through canopy opening rod handle slip steel roa tube guide hole side fuselage Use little pressure wiggle tube too long may filed shorter minimum 2/s must extend 1/32 out side fuselage ticklish job will go patience may necessary file bevel end brass tube Once tube has entered side slide steel rod through both sides fuselage slide brass tube through other side C Bend 1/16 piano wire 2 pcs 900 7/8 long shown detail Clean inside brass tube acetone alcohol pushing small saturated piece tissue paper through hole Use soldering gun acid core solder unit Cut small pieces solder insert end tube trying get some acid Hold soldering gun end tube melt solder tin inside tube same other end Rough ends 1/16 wire fit brass tube tin solder D Clamp tape control rod hold control horn position slightly aft straight down point need helper pair pliers Center brass tube fuselage extend equally side fuselage Have helper hold fuselage steady hold end brass tube sliding Slip brass washer opposite end hold bent wire pliers end wire Heat tinned end holdingagainst end brass tube till solder melts wire begins slide Apply solder push wire tion parallel bottom wing boss Hold heat till sure solder has flowed inside tube Continue holding wire till solder changes color indicating solid E Release control rod capture side just soldered slip piece cardboard piece paper folded 5 6 thicknesses about 1/64 between washer fuselage tape place provide end play through fuselage Cut 3/16 X 3/8 spruce side rails length shown plan use alignment tools solder other flap wire place Slide rod through rear wing rod tube soldered side place spruce stick top flap wire extend under wing rod hold place two clothes pins small clamps Clamp very lightly crush spruce causing misalignment Again cap ture control rod before have helper hold fuselage flap wire just soldered will pushed through Clamp other wire spruce stick slip brass washer hold wire against tube holding ruce up under wing rod matching other soldering gun repeat pro other side 3 sloppy loose us iides slide hole slot return Assemble Fin 1 Drill hole top ruse control cable Hole may up -i 2 Try fin fit Spar should butt ens fuselage bottom hinge tab slide insiae 3 Insert long wing rod wing rod tube tape centered 4 Slip stab rod stab hinge hole sight wing rod level Use straight edge down side fm center compare seam fuselage 5 Remove flat file top fuselage fin contacts Coat contact area 5-minute epoxy repeat operation No4 Hold hand keep checking alignment till epoxy sets 6 Fillet fin fuselage epoxy 7 Epoxy stab control inside fuselage shown through rear fuselage Tail Cone Skid 1 Cut notch balsa block 9/16 deep fit over fin spar hinge Slip block place press hard against end fuse lage Pencil mark diameter fuselage end block Remove make circular cut 1/32 deep 1/8 front block Carve step end block slip inside fuselage cutting approximately 1/32 inside fuselage mark end block Re-coat fin spar epoxy coat contact areas block install 2 Carve block shape sand 3 Cut skid shape radius notch fit clear rudder pin Skid will off center File groove around end rudder pin help removal Epoxy skid place safety pin should used keep rudder pin coming out Rudder Control Cable 1 Cable may exited left right side depending servo travel Drill 5/32 hole centerline exit shown plan approximately centerline fuselage w top fuselage 2/s end fuselage 2 With small round file angle exit hole till cable housing will exit straight line towards rudder horn 3 Epoxy place end housing 2 m end fuselage other end running under flap actuator tube over ballast tubes Stab actuator cable follows same route Tow Hook 1 Position shown plane op timum performancesee flight instructions 2 Fabricated hook shown sufficient serious competition capture tow hook advised should actuated spoiler servo Ballast Tubes Optional Should Ys od thin wall aluminum ardware store oles location shown high bottom wing left side die match holes ide fuselage 1/32 clear slug weighs appr Jontinu ld after age 122 August 1979 69 glue inbor c Two Sizes % ID 10 PRICE 2 lengths Comes ig two STUT FAIRINGS 3 Lengths fairings iiir size 225 cockpit coammn~ -r y COMES IN 3 FT LENGTHS SMALL 118 OR LARGE 114 THIS HINGE COMPLETELY SEALS CONTROL SURFACE AIR LOSS STRONG FLEXIBLE HINGE THAT IS ABLE TO MOVE ooney gapless hinges --* drive shaft broken classical failure mode tubular member under excessive torsional stress After brief discussion decided pull off propeller make hand-launched Gossa mer Glider Two assistants ran along side handles Bryan flew back hangar Paul assessed situation resolved replace drive shaft aluminum did temporarily present version has GFRP drive shaft Much additional work has done complete set spare parts has built enough build entire second aircraft Bryan has continued physical training designed peak first break weather over English channel Plans suitable hangar near Dover have abandoned since team can set up now five minutes planned move England April Im looking forward big attempt think theyll make Adventures/Harrah continued page 61 gravity seems help projected wing stab area about 2000 sq loading about 10 ounces per square foot flying surface little high weak thermals will have hunt out some boomers long flights short engine runs lighter covering little sanding in-sight weight reduc tion would bring down between 7- 8-pound figure Great thermaling al A1 Packaged 2 Ft Size AND PRICE 5195Ipkg GAP LESS HINGE SLOTTER Makes Slots 4 Sizes Balsa %-Y-Ae /4 PRICE S195 FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 Phone 503 357 2732 though doesnt take away neat sport model 9 pounds no tricks mounting Proctor hardware spring mounted set cables maintain tension 2 4 pounds usually required type slow flying plane faster planes require overcome air pressure control surfaces about 6 pounds used one-spring method others use two two-spring method allows control surface deflection both directions case inadvertently moved reducing potential damage system Proctor fittings give finishing touch scale models very functional needed Naturally already guessed half Sig lumberyard went project availability straight-grained spruce large sheets 1/16 ply made building lot easier Jugs Titebond glue some Devcon Slow Cure epoxy Wilhold R/C56 glue wind shields used put together Williams Bros inverted U spear used guide tail wheel Du-Bro wheels Fox wheel fittings rounded out ground support Well Sunday morning perfect first flight engine started right up test glides range check engine running perfect Checked high low throttle nose held vertical could offer no excuse stay ground moment truth hand Ner vous Taxi fine increased rpm went left over-corrected rudder same time parted company ground surprised about 2/3 throttle airborne about 25 feet happened original design pop-off struts came back earth moment realized heading light standard No J4 sticking out Leroys head winding up picture missed itby inches Regaining some control myself plane put slow right turn left wing panel creasing its dihedral cut throttle off managed just clear trees could keep nose up headed slow right spin gave full left rudder full up elevator hoping pop wheels wheels did hit just before nose damage minor plane major pride Repairs now process snap-off struts being re placed working screw-mounted struts go back next flight time will spent ground taxiing did fly Taylorcraft things con sidered lot achieved learned K&B 61 experiments prop tests Proctor control systems surpassed ex pectations two failings both design other pilot error lucky have little repair learned found K&B engine Taylorcraft can wonderful sport-flying oombination Thanks Sterling Peanut version great old bird we-fly can magnificent horror over have go find Diana Cream Invader/Smith continued page 69 4 Slide tubes fuselage epoxy heavily after roughing od corner file glue areas 5 File end tubes flush side fuselage secure ballast strip plastic tape Radie Installatien 1 Installation shown Kraft radio other radio used essential same structural configuration used side rails cross rails Positions may altered suit radio 2 Shape side rails fit contour fuselage Use Hobbypoxy #2 gluing area Epoxy side rails place Fabricate lay out drill cross rails braces epoxy place 3 Loose-install servos align anchor front end cables control linkages Remove servos 4 Sand center seams fuselage smooth wet-or-dry sand entire fuselage re move orange peel effect gel coat Finishpaint fuselage sand canopy bottom needed obtain good fit cut out rear canopy clear control mechan ism Install hook canopy hooks servo rails Finish paint canopy 5 One Airtronics skid other suitable skid installed Install radio hook up linkages Assemble finished tail surfaces 122 Model Aviation Winning Ideas FOURMOST specialize WINNING Ideas AVIATION JEWELRY Largest Aircraft Jewelry Selection World CUSTOM JEWELRY SPECIALISTS Interested dealers full line airplane jewelry write PO Box 56CM JAddison Dallas Texas 75001 -Ph 214 596 3505 CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L051 Specialists brochure send 1 Sc stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 Slide glass wing rod tube marked CG suspend fuselage wing rod resting two blocks equal height table Lay 1 quarter 1 nickel 1 penny stab spar Add ballast nose tail necessary bring fuselage level Fill nose fuselage foam blocks anchor ballast Wing 1 Build right wing first Cover plan wax paper 2 Cut fit bottom 1/16 sheeting fit inboard plan exactly butt polyhedral joint flap joint Leave leading edge little short just line visible Pin down leading edge making sure stick exactly 3/16 Some sticks wider way other Use straightedge make sure stick pinned down straight 3 Pin down 3/16 X 1/4 sub spar using straightedge step 2 4 Ribs 1 through 13 too long Cut off back ends establish correct length assembly Drill ribs No 1 through 8 spoiler tube 5 Glue ribs #1 #12 place 6 Cut top bottom ar length cut angle polyhedral end shown both spars 7 Install bottom spar Hot Stuff end keep place 8 Ribs #2 through #11 cut two same spar cross sections differ rib out #6 rib Rib #2 has entire 3/ spar section removed Ribs #34 5 6 have ved back spar notch leave front section remaining ribs #7 through #11 have removed center spar notches Cut ribs keeping halves matched install leading edge D section ribs use ribs position spar rib notch Hot Stuff spar bottom sheeting 9 Cut spar vertical members match detail both wings Dry-install top bottom spar check wing rod tubes will fit necessary roll piece sandpaper line-sand holes tubes Tubes should slide holes freely may necessary trim front back vertical spar members slip between tubes Pin down through sheeting sure wing flat table 10 Trim rear sections ribs #2 #3 fit Hot Stuff place Remove vertical spar sections prepare enough Hobbypoxy #2 epoxy spars wingrod tubes Assemble vertical spar members tubes including rear brass tube 11 Trim install rear sections ribs #4 through #12 12 Install rubberhookand 1/16 X5/8X 1-15/16 plywood reinforcements 13 Install top spar #2 epoxy re-coat wing-rod tubes heavily along ribs #1 #2 joints Plug tube ends 14 Install 11 LE backup pieces 15 Drill diagonal ribs spoiler tube install 16 Layoutandcutnotchinribs#7#8 #9 #10 #11 3/16 X 3/16 balsa stick install stick flush top rib 17 Install spoiler tube attach bottom 3/16 stick notched block 3/16 balsa 18 Box spoiler bay 1/16 balsa sheet keep dirt out wing 19 Reinforce glue joints needed Titebond epoxy 20 Do sheet top time Flap 1 Cut two pieces 1/32 sheet balsa 2 wide 3/32 shorter inner wing panel both bottom sections flaps Cut two pieces 1/32 sheet balsa X 2-1/32 top sheeting 2 Notch corner bottom sheeting 1 wide X 15/16 long fit plywood inserts flap actuator slot 3 Pin down bottom sheet 4 Cut plywood inserts shown detail epoxy stack After set check slot will slip easily 1/16 rod Run drill through safety guide hole make loose slip fit guide pin Hot Stuff assembly place 5 Sand angle top flap spar match angle rib 6 Pin down flap spar being sure parallel wing sub spar Hot Stuff bottom sheeting 7 Cut 24 ribs per detail cutting strip 1/16 sheet balsa 30 wide Cut off pieces 1 3/4 long straightedge cut diagonally 8 Install ribs 9 Install top sheeting August 1979 123 new_ruleasos Bucker JUNGMEISTER radi nn*rni 020 rubb powerclukey 36 span 12 channel RIC tree flight S1495 3wingspan Seagullfor rubber available soon C02 power SEEYOURsend25Uor DEALER NOWcatalog FLYLINE MODELS INC 220317035732038 OS WANKEL ROTARY Hobby Barn Special $8999 SUPER TIGRE X-29 SPEED OFF Hobby Barn Special $3899 %P K&B61 RIC HB Special $5999 Hobby Barn PO Box 17856-M Tucson Arizona 85731 American Made ReadyTo Fly 1 High Quality 2 3 & 4 Channel RIC Models Are Really Ready Radio & Engine Choicel Shown example line CARDINAL Sport An excellent first aileron ship also flies well rudder Rud der-Elevator-Aileron Steerable nose wheel 3 4 channel 58 span 460 sq wing area 4 lb weight 20-22 oz wing loading average radio 25 35 eng 29 rec commended Balsa sheeted foam core wing wheel pants included installed SeeISSUE OT ~920 San ta Fe T rail complete FLfl wiju- story write address below complete info Lenexa KS 66215 913492-81331 SPOMODEL KITSANEV ERA RUSLICATION m. IAEROBATIC AIRPLANES /I8Y POST C MORRISON 45 PAGES SX II 52 PHOTOS / IS DETAILED DRAWINGS STRINGLESS WONDERON NITS 18only 5395 PLUS POSTAGE KIT $29579 CATALOG $100 KIT $3 95 GUIDE OF RUEBEE MODEL SUPPLIESCATALOGS 3100REPLATECH L INTERNATIONAL INC PPIPO BOX 2498-MA49800 MC KENZIE HWY Wec-yaesLA MESA CALIP 92041VIDA OREGON 97485 Outboard Wing 1 Cover plan wax paper 2 Butt inboard wing section out board section plan inboard section propped up near rib #4 indicated plan with2 block Align perfectly pin down Joint will built 3 Cut pin down 1/16 bottom sheet ing rib *13 rib #21 fit plan leaving leading edge line barely exposed 4 Cut pin down leading edge end use straightedge pin down between 5 Cut pruce bottom spar length lay placedo glue 6 Cutribsparnotchoutofribs #12 #13 allow spar splice install now 7 Glue ribs * 14 through #21 allow ing ribs position spar 8 Make four spar splices trimming 50 dihedral 9 Fit top spar epoxy splices place 10 Add short sub spar rib #13 rein forcement epoxy along rib #13 11 Cut add 1/16 balsa shear web both sides spar shown using scrap ends sheeting 12 Unpin trailing edge rib #19 #21 cut washout shims 3/16 balsa Slide rear shim under trailing edge wax paper Slide end shim under wax paper position under rib #21 13 Sheet top panel washout built 14 Wing tip added after leading edge shaped wing panel sanded 15 Build left wing point com pletion before sheeting inboard section using left wing reference Finishing Inboard Section 1 Again check good fill epoxy around wing rod tubes reinforcements Add epoxy needed 2 Sheet top carefully trim spoiler bay 3 Cut spoiler blade fit opening 4 Cut sand ribs spoiler bay become floor blade leaving blade above surface slightly allow sanding wing contour sand ribs let spoiler barely below surface wing Finishing Wing 1 Plane sand bottom leading edge sheeting shown end view wing full span 2 Radius leading edgemake gage keep radius uniform 3 Sand trailing edge top continue rib contour until trailing edge 1/16 thick 4 Wing tip instructions plan 5 Finish sand MonoKote wing 6 Install spoiler pull-string blades 7 Butt flap against wing align ends have clearance both ends Temporarily tape bottom scotch tape masking tape Fold flap down against under side wing lay mylar -wide tape over wing sub spar flap spar Raise flap neutral position tape along bottom joint removing temporary tape go Flying 1 Be sure CG correct 2 Check warps wing 3 Check controls work freely return neutral 4 Set stab rudder neutral 5 Make first hand-glide running attitude feel lift judge speed Throw straight level fairly hard get controls quickly get straight level fast can almost gnarantee trimmed perfectly 6 High-Start launchkeep up speed A Set full down trim stab 1 24 Model Aviation great schoolyard scale TRAVEL AIR 6OOO plus $200 postage 602-747-3633 B Obtain least 10 lbs pull highstart C Lower flaps ling edge D Throw hard nose up 300 450 get controls quickly correct turn too nose-high attitude Remember Invader flies faster sailpianes Keep speed up As launch progresses return stab trim neutral Begin hold slight up stab towards top launch until ready release Winch Launch Set stab rudder neutral Keep up speed B Lower flaps eload winch stand switch throw hard nose up 300 being careful lose balance Immediately start pulsing winch keep speed rela tively high until familiar launch/stall characteristics Dont try fantastic launches until get some practice first few flights used get familiar bird Fly straight level flaps launch position neutral stab trim feel out turns stalls Land flaps same position Flap Settings Launchdown trating trackingneutral Thermalingdown flap tight circle Let-down altitudefull flaps spoilers dive straight spiral 300 450 nose-down Landingwindy neutral Calm Trim LaunchHigh-start down Winch neutral Thermalingup required Penetratingslight down Landingneutral sailplane designed cover area Use way Dont park float unless known no lift around floating dynamic soaring order crank up trim determined experience fly gently few control movements possible thermaling keep turns flat possible again move controls needed nose tends drop tight turns requires up trim possibly some outside rudder Keep speed fairly high unless super lift up trim can help speed distance 8 oz 24 oz ballast required depending condi tions Eight oz ballast hardly affects sink rate sometimes used duration flights landing will skid landed flat however slight dork will nail spot throw dirt over top will stop Letters Editor continued page 5 fixtures floor lamps everything goes right can wind have Midwest winder mounted suction cup vise launch retrieve leaving chair old mans flying.. Wouldnt fun have contest winner contestant 1 minute flights during shindig everybody flys winds etc dont need timers need counters L F Randolph Dallas TX Sanity Pylon Sanity Racing nice article have concluded rules making procedure too democratic fellow Kilsdonk comes U/C speed completely undoes what lot us have doing pylon has com pletely different frame reference trying turn fun event specialist event won machine shop Unfortunately history AMA events net result shall use own WILLI rules continue have fun Frank B Baker Madison WI As know afamiliarprob tern No matter what ideals attach founding new eventbeginners fun etctechnical aspects attendant skill levels remorsely escalate nature competition note group clubs intends hang onto own special-event rules have effec tive attracting new pylon fliers Nor can blame Big John doing what comes naturally food thought.. Export Messerschmitt January issue Model Aviation free flight column page 61 published picture Bill Noonan Messerschmitt 20B stated plan published MA Although have subscription 1979 issues have yet received issue giving further details plan should glad could let know will available reason later year will holding rubber scale contest England probably Nationals would seem fine example such contest However time getting bit short way could let have copy plan quickly would grateful knowing much will cost cannot send money stage would gladly hearing what worth would mention am Editor SMAE NEWS Needless say think maga zine excellentit far superior anyAugust 1979 125 PRESENTING THE OCTURA F MOTOR MOUNT Almost quickly can say Swift Switch CHANGE FROM 60 TO 45 ENGINE OR VICE VERSA WITHOUT REMOVING THE ENTIRE MOUNT FROM HULL THE INSERT ON WHICH ENGINE IS MOUNTED! Featur d minimum parts Strong light extruded aluminum onepiece base onepiece insert 5 wide Interchanges Octura 556 5-60 Motor Mounts Ideally suited deep vee hulls Insert deep enough accomodate 65 engines Price $1550 per assembly md insert Additional inserts $550 sa Inserts sized drilled tapped popular marine engines $750 ea Order directly Only available local hobby dealer add 10% poatage Illinois residents add additional 5/ sales tao Send 5OZ catalOg OCTURA MODELS INC price list Celebrating 25th year 7351 N Hamlin Ave ie IL 60076 OCT I MODEL MARINE SUPPLIES SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1979/08
Page Numbers: 65, 66, 67, 68, 69, 122, 123, 124, 125
NO OCR TEXT THE Invader has flying four years now beginning much simpler sailplane same basic design MK IV has gone through four stages develop ment better performance structural strength until now what believe super competition sailplane will take Preceding page Beautiful young lady Herbs daughter Christine Martin beautiful sailplane azure skies snowcapped peaks Colorado Rockies delightful photo other pictures Maurice Kaiser punishment can give Its 1978 performance speaks itself have flown itto become 1978 Rocky Moun tain Soaring Association club champion attained rank Master Flyer 1st place 1978 LSF Regional Tournament 8th place FM USA Team Selection finals 1st place four RMSA AMA contests 1st place Pikes Peak RC contest several 2nd places has competition host formidable opponents RMSA including Skip Miller mention 40 best Pensacola initial concept came about through evaluation contest tasks both AMA FAI goal being design sail plane capable performing well tasks weather conditions boiled down five requirements must light-air floater must super strong must fast speed tasks must able penetrate wind have good L/D ratio distance thermal 66 Model Aviation Construction poly break before top sheeting has bean added Compare plan top view sea spar cross sections along plan top construction wing root before top sheeting ply pieces three glass tubee spar locked togetherrubber hook just aft Attop lathe basic frame ruddernote sturdy hinging arrangement mount small fin Below half all-flying stab servo rail arrangement shown detailed plan Rails spruce laminated ply cross pieces Servo positions throws given Convenient-to-use ballast tubes rest spruce cradle seen three circular openings just above two hookthis captured Fin ruggedly built tuselage plans OCtIl uaisa Talring blocks minimize disturbed air fin/stabilizer junction Rudder clevis shows FULL SIZE PLANS AVAILABLE. SEE PAGE 128 _-_ _I_ _ _ _ ___ _ _1_J88848~ jJ _ _ _K L4 INVADER MK N S 888888888 88888C838008T880888880888 OS 880888 888 888 8 8 888888 8A880C8808/8O8C7y8--- 8- 8NE8O8 88888B SO-IS88888 8083888888888808 88888888 51188 88888080888888 -8888888V888f} 848888888884 8 88 8 8888888 88888 L8888888888J ffl882c888 88 83V888888880~ INVADER MK& hunting ribs plus 1/16 sheeting entire wing altitude high-speed dives fear accomplished starting virtually bullet-proofflutter full flap spoilers can super clean airframe speed LID course beef adds weightbe brought down moderate dive low ratio Large flaps change airfoil camberwhich ends up 85 oz per sq ft wingspeed Getting down never problem full-flying stab change angle attackloading have found simply makes MK IV free flight must floating light air As strength thethe plane fly faster lets airfoil workbe flown time except super calm entire sailplane just strong Especi-at higher Reynolds number rate itair mainly because reacts slightest ally wing has super sparis still floaterdisturbance air still very stable diagonal ribbing addition conventional MK IV can brought down fromespecially very high speeds very August 1979 67 Spoiler wade snown enenaea Iross section aT spoiler detail plans shows actuation methodfitting under spoiler may seen picture wing panel joins fuselage Note generous flap left picture Combo flap flying tail broadens performance range respon Flowris very docile siinter mediate competition sa Try snap roll just give full ups hold let wh fun barrel mor Instructioni Fin Rudder Assemble spars hinge assembly 1 Rudder sparsi18 X 1/4 spruce 2 pieces Notch hinge tab tions spars contact c hinge tabs sandwiched between 2 Fin spars 2 spruce 2 pieces Same step 3 Dry-run-assemble fin spar rudder spar hinges 3/32 piano wire hinge pin place Clamp together Check hinge positions free movement satis fied epoxy 5 minutes slow dry spar hinge units being careful get epoxy hinge bearings Note Some hinge holes tighter others may necessitate making pin smaller chuck pm drill polish down using 400 320 wet dry paper Carve clearance opposite hinge bosses fin rudder spars 4 Assemble fin first Put wax paper plan Assemble inner frame first consists fin/spar hinge assembly bottom X ce piece 3/32 hole drilled position shown control cable housing accurately possible location hole 3 pieces alsa Epoxy unit together wipe excess off top sticks B Remove plan dry add thick balsa fillet front fin airfoil time C Trim top hinge tab clear stab hinge tube trying 1/32 plywood side brass tube through hole Trim sand top edges 1/32 plywood sides align top stab boss comparing plan brass tube through hole both side pieces alignment neutral position stab D Rough outer stab cable housing areas epoxy 4 spruce top housing exact and exact contour shown un balsa stick needed -dry-assemble two ass tube place against fin vi through vood su h 1 thinly dure extenos w two ways F wo stab boss leu stab hinge tube sure hole 5/16 sides boss Glue both parts ii being careful make top parallel ood G Sheet fin above stab 1/16 balsa Cut radius slot front stab rod brass tube 1 radius rear hinge hole Allow full el way After stab assembled check moves freely necessary widen radius slot H Airfoil leading edge fix fuselage time Will covered fuselage instructions Rudder 1 Cover plan wax paper 2 Make shims shown right ruddi 4 Pin down TE shims shown being sure 1/32 pad 1/16 inside rear plan shown 5 Cut TE stock top piece pin glue place Trim top piece after rudder removed plan 6 Cut remaining perimeter sticks pin place using proper shims glue Note 1/8 X 3/16 stick just above fin should fit around hinge boss epoxied along gusset 7 Cut fit glue diagonal rib sticks being sure use shims under end 8 Remove plan cut two pieces pruce control horn boss Notch inside slightly two pieces will andwich over hinge tab epoxy plan wax E stock4pcstofit s 1/32 base type Pin glue TE place ut pin glue LE tip pieces Use 1/32 shims under LE 3 Cut two pieces 1/8 X 3/16 balsa about 3 long Stack together mark hole locations too far end 1 center-to-center dimensions should accurate possible Holes should cen tered stick drilled square through sticks Mark top sticks keep inverting assembly still pinned together trim ends position holes correct distance end glue place time 4 Squeeze s tubes about pliersvery slightly File sand radius ends stab rods push through tube until will push through snugly Remember will two rods place assembly therefore twice hold ing power keep stab rods 5 Insert brass tubes drilled sticks squeezed ends outboard check alignment sure ends tubes flush sticks pin glue assembly place holes well centered sticks place 1/32 shim under outboard ends tubes sure tubes square plan parallel 6 Cut two 1/8 X 3/16 balsa sticks butt outboard ends tubes glue place Cut 4 pieces 1/8 X 3/16 balsa fit along 68 Model Aviation control horn position bottom rudder e line up control r e should ce n ton glue 11 Fi1 sande stick plan 3 Pin rudder spar hinge assembly place fiat plan establishes center line e plan Behind recelverand batterythe fourservos oompactiyarrangedagain check rail planform detail top L R rudder fiap servos bottom L R Stab spoilerltow hook servos tide o epoxy entire stress e 1/16 X 3/16 cross place flat plan rners - ut 1/16 spars piec shape desired cross sticks 1/16 sq balsa sanded sym Lrical airfoil 11 Radius LE finish-sand covering Fuselage 1 Drill file elongated slot left rear side wing boss permit entry spruce cross brace Insert spruce through slot until butts opposite side mark stick Remove cut notch 3/16 deep about 1/32 inside mark re-insert stick check length Trim fit until will bear against both sides Epoxy place after set cut off flush wing boss 2 Rough 3/32 X 2-9/16 brass tube corner file epoxy rear wing rod hole Install two fiberglass tubes epoxy prom inside Cutandfit X cecrossbraceat wing boss Keep high location r clear spoiler pull Epoxy assembly Use acid horn 3/32 X fl centerline neces t bolt tuuCs Sc prevent B Snap ends brass tube fuselage Use 1 guide through fuselage hole bly through canopy opening rod handle slip steel roa tube guide hole side fuselage Use little pressure wiggle tube too long may filed shorter minimum 2/s must extend 1/32 out side fuselage ticklish job will go patience may necessary file bevel end brass tube Once tube has entered side slide steel rod through both sides fuselage slide brass tube through other side C Bend 1/16 piano wire 2 pcs 900 7/8 long shown detail Clean inside brass tube acetone alcohol pushing small saturated piece tissue paper through hole Use soldering gun acid core solder unit Cut small pieces solder insert end tube trying get some acid Hold soldering gun end tube melt solder tin inside tube same other end Rough ends 1/16 wire fit brass tube tin solder D Clamp tape control rod hold control horn position slightly aft straight down point need helper pair pliers Center brass tube fuselage extend equally side fuselage Have helper hold fuselage steady hold end brass tube sliding Slip brass washer opposite end hold bent wire pliers end wire Heat tinned end holdingagainst end brass tube till solder melts wire begins slide Apply solder push wire tion parallel bottom wing boss Hold heat till sure solder has flowed inside tube Continue holding wire till solder changes color indicating solid E Release control rod capture side just soldered slip piece cardboard piece paper folded 5 6 thicknesses about 1/64 between washer fuselage tape place provide end play through fuselage Cut 3/16 X 3/8 spruce side rails length shown plan use alignment tools solder other flap wire place Slide rod through rear wing rod tube soldered side place spruce stick top flap wire extend under wing rod hold place two clothes pins small clamps Clamp very lightly crush spruce causing misalignment Again cap ture control rod before have helper hold fuselage flap wire just soldered will pushed through Clamp other wire spruce stick slip brass washer hold wire against tube holding ruce up under wing rod matching other soldering gun repeat pro other side 3 sloppy loose us iides slide hole slot return Assemble Fin 1 Drill hole top ruse control cable Hole may up -i 2 Try fin fit Spar should butt ens fuselage bottom hinge tab slide insiae 3 Insert long wing rod wing rod tube tape centered 4 Slip stab rod stab hinge hole sight wing rod level Use straight edge down side fm center compare seam fuselage 5 Remove flat file top fuselage fin contacts Coat contact area 5-minute epoxy repeat operation No4 Hold hand keep checking alignment till epoxy sets 6 Fillet fin fuselage epoxy 7 Epoxy stab control inside fuselage shown through rear fuselage Tail Cone Skid 1 Cut notch balsa block 9/16 deep fit over fin spar hinge Slip block place press hard against end fuse lage Pencil mark diameter fuselage end block Remove make circular cut 1/32 deep 1/8 front block Carve step end block slip inside fuselage cutting approximately 1/32 inside fuselage mark end block Re-coat fin spar epoxy coat contact areas block install 2 Carve block shape sand 3 Cut skid shape radius notch fit clear rudder pin Skid will off center File groove around end rudder pin help removal Epoxy skid place safety pin should used keep rudder pin coming out Rudder Control Cable 1 Cable may exited left right side depending servo travel Drill 5/32 hole centerline exit shown plan approximately centerline fuselage w top fuselage 2/s end fuselage 2 With small round file angle exit hole till cable housing will exit straight line towards rudder horn 3 Epoxy place end housing 2 m end fuselage other end running under flap actuator tube over ballast tubes Stab actuator cable follows same route Tow Hook 1 Position shown plane op timum performancesee flight instructions 2 Fabricated hook shown sufficient serious competition capture tow hook advised should actuated spoiler servo Ballast Tubes Optional Should Ys od thin wall aluminum ardware store oles location shown high bottom wing left side die match holes ide fuselage 1/32 clear slug weighs appr Jontinu ld after age 122 August 1979 69 glue inbor c Two Sizes % ID 10 PRICE 2 lengths Comes ig two STUT FAIRINGS 3 Lengths fairings iiir size 225 cockpit coammn~ -r y COMES IN 3 FT LENGTHS SMALL 118 OR LARGE 114 THIS HINGE COMPLETELY SEALS CONTROL SURFACE AIR LOSS STRONG FLEXIBLE HINGE THAT IS ABLE TO MOVE ooney gapless hinges --* drive shaft broken classical failure mode tubular member under excessive torsional stress After brief discussion decided pull off propeller make hand-launched Gossa mer Glider Two assistants ran along side handles Bryan flew back hangar Paul assessed situation resolved replace drive shaft aluminum did temporarily present version has GFRP drive shaft Much additional work has done complete set spare parts has built enough build entire second aircraft Bryan has continued physical training designed peak first break weather over English channel Plans suitable hangar near Dover have abandoned since team can set up now five minutes planned move England April Im looking forward big attempt think theyll make Adventures/Harrah continued page 61 gravity seems help projected wing stab area about 2000 sq loading about 10 ounces per square foot flying surface little high weak thermals will have hunt out some boomers long flights short engine runs lighter covering little sanding in-sight weight reduc tion would bring down between 7- 8-pound figure Great thermaling al A1 Packaged 2 Ft Size AND PRICE 5195Ipkg GAP LESS HINGE SLOTTER Makes Slots 4 Sizes Balsa %-Y-Ae /4 PRICE S195 FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 Phone 503 357 2732 though doesnt take away neat sport model 9 pounds no tricks mounting Proctor hardware spring mounted set cables maintain tension 2 4 pounds usually required type slow flying plane faster planes require overcome air pressure control surfaces about 6 pounds used one-spring method others use two two-spring method allows control surface deflection both directions case inadvertently moved reducing potential damage system Proctor fittings give finishing touch scale models very functional needed Naturally already guessed half Sig lumberyard went project availability straight-grained spruce large sheets 1/16 ply made building lot easier Jugs Titebond glue some Devcon Slow Cure epoxy Wilhold R/C56 glue wind shields used put together Williams Bros inverted U spear used guide tail wheel Du-Bro wheels Fox wheel fittings rounded out ground support Well Sunday morning perfect first flight engine started right up test glides range check engine running perfect Checked high low throttle nose held vertical could offer no excuse stay ground moment truth hand Ner vous Taxi fine increased rpm went left over-corrected rudder same time parted company ground surprised about 2/3 throttle airborne about 25 feet happened original design pop-off struts came back earth moment realized heading light standard No J4 sticking out Leroys head winding up picture missed itby inches Regaining some control myself plane put slow right turn left wing panel creasing its dihedral cut throttle off managed just clear trees could keep nose up headed slow right spin gave full left rudder full up elevator hoping pop wheels wheels did hit just before nose damage minor plane major pride Repairs now process snap-off struts being re placed working screw-mounted struts go back next flight time will spent ground taxiing did fly Taylorcraft things con sidered lot achieved learned K&B 61 experiments prop tests Proctor control systems surpassed ex pectations two failings both design other pilot error lucky have little repair learned found K&B engine Taylorcraft can wonderful sport-flying oombination Thanks Sterling Peanut version great old bird we-fly can magnificent horror over have go find Diana Cream Invader/Smith continued page 69 4 Slide tubes fuselage epoxy heavily after roughing od corner file glue areas 5 File end tubes flush side fuselage secure ballast strip plastic tape Radie Installatien 1 Installation shown Kraft radio other radio used essential same structural configuration used side rails cross rails Positions may altered suit radio 2 Shape side rails fit contour fuselage Use Hobbypoxy #2 gluing area Epoxy side rails place Fabricate lay out drill cross rails braces epoxy place 3 Loose-install servos align anchor front end cables control linkages Remove servos 4 Sand center seams fuselage smooth wet-or-dry sand entire fuselage re move orange peel effect gel coat Finishpaint fuselage sand canopy bottom needed obtain good fit cut out rear canopy clear control mechan ism Install hook canopy hooks servo rails Finish paint canopy 5 One Airtronics skid other suitable skid installed Install radio hook up linkages Assemble finished tail surfaces 122 Model Aviation Winning Ideas FOURMOST specialize WINNING Ideas AVIATION JEWELRY Largest Aircraft Jewelry Selection World CUSTOM JEWELRY SPECIALISTS Interested dealers full line airplane jewelry write PO Box 56CM JAddison Dallas Texas 75001 -Ph 214 596 3505 CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L051 Specialists brochure send 1 Sc stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 Slide glass wing rod tube marked CG suspend fuselage wing rod resting two blocks equal height table Lay 1 quarter 1 nickel 1 penny stab spar Add ballast nose tail necessary bring fuselage level Fill nose fuselage foam blocks anchor ballast Wing 1 Build right wing first Cover plan wax paper 2 Cut fit bottom 1/16 sheeting fit inboard plan exactly butt polyhedral joint flap joint Leave leading edge little short just line visible Pin down leading edge making sure stick exactly 3/16 Some sticks wider way other Use straightedge make sure stick pinned down straight 3 Pin down 3/16 X 1/4 sub spar using straightedge step 2 4 Ribs 1 through 13 too long Cut off back ends establish correct length assembly Drill ribs No 1 through 8 spoiler tube 5 Glue ribs #1 #12 place 6 Cut top bottom ar length cut angle polyhedral end shown both spars 7 Install bottom spar Hot Stuff end keep place 8 Ribs #2 through #11 cut two same spar cross sections differ rib out #6 rib Rib #2 has entire 3/ spar section removed Ribs #34 5 6 have ved back spar notch leave front section remaining ribs #7 through #11 have removed center spar notches Cut ribs keeping halves matched install leading edge D section ribs use ribs position spar rib notch Hot Stuff spar bottom sheeting 9 Cut spar vertical members match detail both wings Dry-install top bottom spar check wing rod tubes will fit necessary roll piece sandpaper line-sand holes tubes Tubes should slide holes freely may necessary trim front back vertical spar members slip between tubes Pin down through sheeting sure wing flat table 10 Trim rear sections ribs #2 #3 fit Hot Stuff place Remove vertical spar sections prepare enough Hobbypoxy #2 epoxy spars wingrod tubes Assemble vertical spar members tubes including rear brass tube 11 Trim install rear sections ribs #4 through #12 12 Install rubberhookand 1/16 X5/8X 1-15/16 plywood reinforcements 13 Install top spar #2 epoxy re-coat wing-rod tubes heavily along ribs #1 #2 joints Plug tube ends 14 Install 11 LE backup pieces 15 Drill diagonal ribs spoiler tube install 16 Layoutandcutnotchinribs#7#8 #9 #10 #11 3/16 X 3/16 balsa stick install stick flush top rib 17 Install spoiler tube attach bottom 3/16 stick notched block 3/16 balsa 18 Box spoiler bay 1/16 balsa sheet keep dirt out wing 19 Reinforce glue joints needed Titebond epoxy 20 Do sheet top time Flap 1 Cut two pieces 1/32 sheet balsa 2 wide 3/32 shorter inner wing panel both bottom sections flaps Cut two pieces 1/32 sheet balsa X 2-1/32 top sheeting 2 Notch corner bottom sheeting 1 wide X 15/16 long fit plywood inserts flap actuator slot 3 Pin down bottom sheet 4 Cut plywood inserts shown detail epoxy stack After set check slot will slip easily 1/16 rod Run drill through safety guide hole make loose slip fit guide pin Hot Stuff assembly place 5 Sand angle top flap spar match angle rib 6 Pin down flap spar being sure parallel wing sub spar Hot Stuff bottom sheeting 7 Cut 24 ribs per detail cutting strip 1/16 sheet balsa 30 wide Cut off pieces 1 3/4 long straightedge cut diagonally 8 Install ribs 9 Install top sheeting August 1979 123 new_ruleasos Bucker JUNGMEISTER radi nn*rni 020 rubb powerclukey 36 span 12 channel RIC tree flight S1495 3wingspan Seagullfor rubber available soon C02 power SEEYOURsend25Uor DEALER NOWcatalog FLYLINE MODELS INC 220317035732038 OS WANKEL ROTARY Hobby Barn Special $8999 SUPER TIGRE X-29 SPEED OFF Hobby Barn Special $3899 %P K&B61 RIC HB Special $5999 Hobby Barn PO Box 17856-M Tucson Arizona 85731 American Made ReadyTo Fly 1 High Quality 2 3 & 4 Channel RIC Models Are Really Ready Radio & Engine Choicel Shown example line CARDINAL Sport An excellent first aileron ship also flies well rudder Rud der-Elevator-Aileron Steerable nose wheel 3 4 channel 58 span 460 sq wing area 4 lb weight 20-22 oz wing loading average radio 25 35 eng 29 rec commended Balsa sheeted foam core wing wheel pants included installed SeeISSUE OT ~920 San ta Fe T rail complete FLfl wiju- story write address below complete info Lenexa KS 66215 913492-81331 SPOMODEL KITSANEV ERA RUSLICATION m. IAEROBATIC AIRPLANES /I8Y POST C MORRISON 45 PAGES SX II 52 PHOTOS / IS DETAILED DRAWINGS STRINGLESS WONDERON NITS 18only 5395 PLUS POSTAGE KIT $29579 CATALOG $100 KIT $3 95 GUIDE OF RUEBEE MODEL SUPPLIESCATALOGS 3100REPLATECH L INTERNATIONAL INC PPIPO BOX 2498-MA49800 MC KENZIE HWY Wec-yaesLA MESA CALIP 92041VIDA OREGON 97485 Outboard Wing 1 Cover plan wax paper 2 Butt inboard wing section out board section plan inboard section propped up near rib #4 indicated plan with2 block Align perfectly pin down Joint will built 3 Cut pin down 1/16 bottom sheet ing rib *13 rib #21 fit plan leaving leading edge line barely exposed 4 Cut pin down leading edge end use straightedge pin down between 5 Cut pruce bottom spar length lay placedo glue 6 Cutribsparnotchoutofribs #12 #13 allow spar splice install now 7 Glue ribs * 14 through #21 allow ing ribs position spar 8 Make four spar splices trimming 50 dihedral 9 Fit top spar epoxy splices place 10 Add short sub spar rib #13 rein forcement epoxy along rib #13 11 Cut add 1/16 balsa shear web both sides spar shown using scrap ends sheeting 12 Unpin trailing edge rib #19 #21 cut washout shims 3/16 balsa Slide rear shim under trailing edge wax paper Slide end shim under wax paper position under rib #21 13 Sheet top panel washout built 14 Wing tip added after leading edge shaped wing panel sanded 15 Build left wing point com pletion before sheeting inboard section using left wing reference Finishing Inboard Section 1 Again check good fill epoxy around wing rod tubes reinforcements Add epoxy needed 2 Sheet top carefully trim spoiler bay 3 Cut spoiler blade fit opening 4 Cut sand ribs spoiler bay become floor blade leaving blade above surface slightly allow sanding wing contour sand ribs let spoiler barely below surface wing Finishing Wing 1 Plane sand bottom leading edge sheeting shown end view wing full span 2 Radius leading edgemake gage keep radius uniform 3 Sand trailing edge top continue rib contour until trailing edge 1/16 thick 4 Wing tip instructions plan 5 Finish sand MonoKote wing 6 Install spoiler pull-string blades 7 Butt flap against wing align ends have clearance both ends Temporarily tape bottom scotch tape masking tape Fold flap down against under side wing lay mylar -wide tape over wing sub spar flap spar Raise flap neutral position tape along bottom joint removing temporary tape go Flying 1 Be sure CG correct 2 Check warps wing 3 Check controls work freely return neutral 4 Set stab rudder neutral 5 Make first hand-glide running attitude feel lift judge speed Throw straight level fairly hard get controls quickly get straight level fast can almost gnarantee trimmed perfectly 6 High-Start launchkeep up speed A Set full down trim stab 1 24 Model Aviation great schoolyard scale TRAVEL AIR 6OOO plus $200 postage 602-747-3633 B Obtain least 10 lbs pull highstart C Lower flaps ling edge D Throw hard nose up 300 450 get controls quickly correct turn too nose-high attitude Remember Invader flies faster sailpianes Keep speed up As launch progresses return stab trim neutral Begin hold slight up stab towards top launch until ready release Winch Launch Set stab rudder neutral Keep up speed B Lower flaps eload winch stand switch throw hard nose up 300 being careful lose balance Immediately start pulsing winch keep speed rela tively high until familiar launch/stall characteristics Dont try fantastic launches until get some practice first few flights used get familiar bird Fly straight level flaps launch position neutral stab trim feel out turns stalls Land flaps same position Flap Settings Launchdown trating trackingneutral Thermalingdown flap tight circle Let-down altitudefull flaps spoilers dive straight spiral 300 450 nose-down Landingwindy neutral Calm Trim LaunchHigh-start down Winch neutral Thermalingup required Penetratingslight down Landingneutral sailplane designed cover area Use way Dont park float unless known no lift around floating dynamic soaring order crank up trim determined experience fly gently few control movements possible thermaling keep turns flat possible again move controls needed nose tends drop tight turns requires up trim possibly some outside rudder Keep speed fairly high unless super lift up trim can help speed distance 8 oz 24 oz ballast required depending condi tions Eight oz ballast hardly affects sink rate sometimes used duration flights landing will skid landed flat however slight dork will nail spot throw dirt over top will stop Letters Editor continued page 5 fixtures floor lamps everything goes right can wind have Midwest winder mounted suction cup vise launch retrieve leaving chair old mans flying.. Wouldnt fun have contest winner contestant 1 minute flights during shindig everybody flys winds etc dont need timers need counters L F Randolph Dallas TX Sanity Pylon Sanity Racing nice article have concluded rules making procedure too democratic fellow Kilsdonk comes U/C speed completely undoes what lot us have doing pylon has com pletely different frame reference trying turn fun event specialist event won machine shop Unfortunately history AMA events net result shall use own WILLI rules continue have fun Frank B Baker Madison WI As know afamiliarprob tern No matter what ideals attach founding new eventbeginners fun etctechnical aspects attendant skill levels remorsely escalate nature competition note group clubs intends hang onto own special-event rules have effec tive attracting new pylon fliers Nor can blame Big John doing what comes naturally food thought.. Export Messerschmitt January issue Model Aviation free flight column page 61 published picture Bill Noonan Messerschmitt 20B stated plan published MA Although have subscription 1979 issues have yet received issue giving further details plan should glad could let know will available reason later year will holding rubber scale contest England probably Nationals would seem fine example such contest However time getting bit short way could let have copy plan quickly would grateful knowing much will cost cannot send money stage would gladly hearing what worth would mention am Editor SMAE NEWS Needless say think maga zine excellentit far superior anyAugust 1979 125 PRESENTING THE OCTURA F MOTOR MOUNT Almost quickly can say Swift Switch CHANGE FROM 60 TO 45 ENGINE OR VICE VERSA WITHOUT REMOVING THE ENTIRE MOUNT FROM HULL THE INSERT ON WHICH ENGINE IS MOUNTED! Featur d minimum parts Strong light extruded aluminum onepiece base onepiece insert 5 wide Interchanges Octura 556 5-60 Motor Mounts Ideally suited deep vee hulls Insert deep enough accomodate 65 engines Price $1550 per assembly md insert Additional inserts $550 sa Inserts sized drilled tapped popular marine engines $750 ea Order directly Only available local hobby dealer add 10% poatage Illinois residents add additional 5/ sales tao Send 5OZ catalOg OCTURA MODELS INC price list Celebrating 25th year 7351 N Hamlin Ave ie IL 60076 OCT I MODEL MARINE SUPPLIES SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1979/08
Page Numbers: 65, 66, 67, 68, 69, 122, 123, 124, 125
NO OCR TEXT THE Invader has flying four years now beginning much simpler sailplane same basic design MK IV has gone through four stages develop ment better performance structural strength until now what believe super competition sailplane will take Preceding page Beautiful young lady Herbs daughter Christine Martin beautiful sailplane azure skies snowcapped peaks Colorado Rockies delightful photo other pictures Maurice Kaiser punishment can give Its 1978 performance speaks itself have flown itto become 1978 Rocky Moun tain Soaring Association club champion attained rank Master Flyer 1st place 1978 LSF Regional Tournament 8th place FM USA Team Selection finals 1st place four RMSA AMA contests 1st place Pikes Peak RC contest several 2nd places has competition host formidable opponents RMSA including Skip Miller mention 40 best Pensacola initial concept came about through evaluation contest tasks both AMA FAI goal being design sail plane capable performing well tasks weather conditions boiled down five requirements must light-air floater must super strong must fast speed tasks must able penetrate wind have good L/D ratio distance thermal 66 Model Aviation Construction poly break before top sheeting has bean added Compare plan top view sea spar cross sections along plan top construction wing root before top sheeting ply pieces three glass tubee spar locked togetherrubber hook just aft Attop lathe basic frame ruddernote sturdy hinging arrangement mount small fin Below half all-flying stab servo rail arrangement shown detailed plan Rails spruce laminated ply cross pieces Servo positions throws given Convenient-to-use ballast tubes rest spruce cradle seen three circular openings just above two hookthis captured Fin ruggedly built tuselage plans OCtIl uaisa Talring blocks minimize disturbed air fin/stabilizer junction Rudder clevis shows FULL SIZE PLANS AVAILABLE. SEE PAGE 128 _-_ _I_ _ _ _ ___ _ _1_J88848~ jJ _ _ _K L4 INVADER MK N S 888888888 88888C838008T880888880888 OS 880888 888 888 8 8 888888 8A880C8808/8O8C7y8--- 8- 8NE8O8 88888B SO-IS88888 8083888888888808 88888888 51188 88888080888888 -8888888V888f} 848888888884 8 88 8 8888888 88888 L8888888888J ffl882c888 88 83V888888880~ INVADER MK& hunting ribs plus 1/16 sheeting entire wing altitude high-speed dives fear accomplished starting virtually bullet-proofflutter full flap spoilers can super clean airframe speed LID course beef adds weightbe brought down moderate dive low ratio Large flaps change airfoil camberwhich ends up 85 oz per sq ft wingspeed Getting down never problem full-flying stab change angle attackloading have found simply makes MK IV free flight must floating light air As strength thethe plane fly faster lets airfoil workbe flown time except super calm entire sailplane just strong Especi-at higher Reynolds number rate itair mainly because reacts slightest ally wing has super sparis still floaterdisturbance air still very stable diagonal ribbing addition conventional MK IV can brought down fromespecially very high speeds very August 1979 67 Spoiler wade snown enenaea Iross section aT spoiler detail plans shows actuation methodfitting under spoiler may seen picture wing panel joins fuselage Note generous flap left picture Combo flap flying tail broadens performance range respon Flowris very docile siinter mediate competition sa Try snap roll just give full ups hold let wh fun barrel mor Instructioni Fin Rudder Assemble spars hinge assembly 1 Rudder sparsi18 X 1/4 spruce 2 pieces Notch hinge tab tions spars contact c hinge tabs sandwiched between 2 Fin spars 2 spruce 2 pieces Same step 3 Dry-run-assemble fin spar rudder spar hinges 3/32 piano wire hinge pin place Clamp together Check hinge positions free movement satis fied epoxy 5 minutes slow dry spar hinge units being careful get epoxy hinge bearings Note Some hinge holes tighter others may necessitate making pin smaller chuck pm drill polish down using 400 320 wet dry paper Carve clearance opposite hinge bosses fin rudder spars 4 Assemble fin first Put wax paper plan Assemble inner frame first consists fin/spar hinge assembly bottom X ce piece 3/32 hole drilled position shown control cable housing accurately possible location hole 3 pieces alsa Epoxy unit together wipe excess off top sticks B Remove plan dry add thick balsa fillet front fin airfoil time C Trim top hinge tab clear stab hinge tube trying 1/32 plywood side brass tube through hole Trim sand top edges 1/32 plywood sides align top stab boss comparing plan brass tube through hole both side pieces alignment neutral position stab D Rough outer stab cable housing areas epoxy 4 spruce top housing exact and exact contour shown un balsa stick needed -dry-assemble two ass tube place against fin vi through vood su h 1 thinly dure extenos w two ways F wo stab boss leu stab hinge tube sure hole 5/16 sides boss Glue both parts ii being careful make top parallel ood G Sheet fin above stab 1/16 balsa Cut radius slot front stab rod brass tube 1 radius rear hinge hole Allow full el way After stab assembled check moves freely necessary widen radius slot H Airfoil leading edge fix fuselage time Will covered fuselage instructions Rudder 1 Cover plan wax paper 2 Make shims shown right ruddi 4 Pin down TE shims shown being sure 1/32 pad 1/16 inside rear plan shown 5 Cut TE stock top piece pin glue place Trim top piece after rudder removed plan 6 Cut remaining perimeter sticks pin place using proper shims glue Note 1/8 X 3/16 stick just above fin should fit around hinge boss epoxied along gusset 7 Cut fit glue diagonal rib sticks being sure use shims under end 8 Remove plan cut two pieces pruce control horn boss Notch inside slightly two pieces will andwich over hinge tab epoxy plan wax E stock4pcstofit s 1/32 base type Pin glue TE place ut pin glue LE tip pieces Use 1/32 shims under LE 3 Cut two pieces 1/8 X 3/16 balsa about 3 long Stack together mark hole locations too far end 1 center-to-center dimensions should accurate possible Holes should cen tered stick drilled square through sticks Mark top sticks keep inverting assembly still pinned together trim ends position holes correct distance end glue place time 4 Squeeze s tubes about pliersvery slightly File sand radius ends stab rods push through tube until will push through snugly Remember will two rods place assembly therefore twice hold ing power keep stab rods 5 Insert brass tubes drilled sticks squeezed ends outboard check alignment sure ends tubes flush sticks pin glue assembly place holes well centered sticks place 1/32 shim under outboard ends tubes sure tubes square plan parallel 6 Cut two 1/8 X 3/16 balsa sticks butt outboard ends tubes glue place Cut 4 pieces 1/8 X 3/16 balsa fit along 68 Model Aviation control horn position bottom rudder e line up control r e should ce n ton glue 11 Fi1 sande stick plan 3 Pin rudder spar hinge assembly place fiat plan establishes center line e plan Behind recelverand batterythe fourservos oompactiyarrangedagain check rail planform detail top L R rudder fiap servos bottom L R Stab spoilerltow hook servos tide o epoxy entire stress e 1/16 X 3/16 cross place flat plan rners - ut 1/16 spars piec shape desired cross sticks 1/16 sq balsa sanded sym Lrical airfoil 11 Radius LE finish-sand covering Fuselage 1 Drill file elongated slot left rear side wing boss permit entry spruce cross brace Insert spruce through slot until butts opposite side mark stick Remove cut notch 3/16 deep about 1/32 inside mark re-insert stick check length Trim fit until will bear against both sides Epoxy place after set cut off flush wing boss 2 Rough 3/32 X 2-9/16 brass tube corner file epoxy rear wing rod hole Install two fiberglass tubes epoxy prom inside Cutandfit X cecrossbraceat wing boss Keep high location r clear spoiler pull Epoxy assembly Use acid horn 3/32 X fl centerline neces t bolt tuuCs Sc prevent B Snap ends brass tube fuselage Use 1 guide through fuselage hole bly through canopy opening rod handle slip steel roa tube guide hole side fuselage Use little pressure wiggle tube too long may filed shorter minimum 2/s must extend 1/32 out side fuselage ticklish job will go patience may necessary file bevel end brass tube Once tube has entered side slide steel rod through both sides fuselage slide brass tube through other side C Bend 1/16 piano wire 2 pcs 900 7/8 long shown detail Clean inside brass tube acetone alcohol pushing small saturated piece tissue paper through hole Use soldering gun acid core solder unit Cut small pieces solder insert end tube trying get some acid Hold soldering gun end tube melt solder tin inside tube same other end Rough ends 1/16 wire fit brass tube tin solder D Clamp tape control rod hold control horn position slightly aft straight down point need helper pair pliers Center brass tube fuselage extend equally side fuselage Have helper hold fuselage steady hold end brass tube sliding Slip brass washer opposite end hold bent wire pliers end wire Heat tinned end holdingagainst end brass tube till solder melts wire begins slide Apply solder push wire tion parallel bottom wing boss Hold heat till sure solder has flowed inside tube Continue holding wire till solder changes color indicating solid E Release control rod capture side just soldered slip piece cardboard piece paper folded 5 6 thicknesses about 1/64 between washer fuselage tape place provide end play through fuselage Cut 3/16 X 3/8 spruce side rails length shown plan use alignment tools solder other flap wire place Slide rod through rear wing rod tube soldered side place spruce stick top flap wire extend under wing rod hold place two clothes pins small clamps Clamp very lightly crush spruce causing misalignment Again cap ture control rod before have helper hold fuselage flap wire just soldered will pushed through Clamp other wire spruce stick slip brass washer hold wire against tube holding ruce up under wing rod matching other soldering gun repeat pro other side 3 sloppy loose us iides slide hole slot return Assemble Fin 1 Drill hole top ruse control cable Hole may up -i 2 Try fin fit Spar should butt ens fuselage bottom hinge tab slide insiae 3 Insert long wing rod wing rod tube tape centered 4 Slip stab rod stab hinge hole sight wing rod level Use straight edge down side fm center compare seam fuselage 5 Remove flat file top fuselage fin contacts Coat contact area 5-minute epoxy repeat operation No4 Hold hand keep checking alignment till epoxy sets 6 Fillet fin fuselage epoxy 7 Epoxy stab control inside fuselage shown through rear fuselage Tail Cone Skid 1 Cut notch balsa block 9/16 deep fit over fin spar hinge Slip block place press hard against end fuse lage Pencil mark diameter fuselage end block Remove make circular cut 1/32 deep 1/8 front block Carve step end block slip inside fuselage cutting approximately 1/32 inside fuselage mark end block Re-coat fin spar epoxy coat contact areas block install 2 Carve block shape sand 3 Cut skid shape radius notch fit clear rudder pin Skid will off center File groove around end rudder pin help removal Epoxy skid place safety pin should used keep rudder pin coming out Rudder Control Cable 1 Cable may exited left right side depending servo travel Drill 5/32 hole centerline exit shown plan approximately centerline fuselage w top fuselage 2/s end fuselage 2 With small round file angle exit hole till cable housing will exit straight line towards rudder horn 3 Epoxy place end housing 2 m end fuselage other end running under flap actuator tube over ballast tubes Stab actuator cable follows same route Tow Hook 1 Position shown plane op timum performancesee flight instructions 2 Fabricated hook shown sufficient serious competition capture tow hook advised should actuated spoiler servo Ballast Tubes Optional Should Ys od thin wall aluminum ardware store oles location shown high bottom wing left side die match holes ide fuselage 1/32 clear slug weighs appr Jontinu ld after age 122 August 1979 69 glue inbor c Two Sizes % ID 10 PRICE 2 lengths Comes ig two STUT FAIRINGS 3 Lengths fairings iiir size 225 cockpit coammn~ -r y COMES IN 3 FT LENGTHS SMALL 118 OR LARGE 114 THIS HINGE COMPLETELY SEALS CONTROL SURFACE AIR LOSS STRONG FLEXIBLE HINGE THAT IS ABLE TO MOVE ooney gapless hinges --* drive shaft broken classical failure mode tubular member under excessive torsional stress After brief discussion decided pull off propeller make hand-launched Gossa mer Glider Two assistants ran along side handles Bryan flew back hangar Paul assessed situation resolved replace drive shaft aluminum did temporarily present version has GFRP drive shaft Much additional work has done complete set spare parts has built enough build entire second aircraft Bryan has continued physical training designed peak first break weather over English channel Plans suitable hangar near Dover have abandoned since team can set up now five minutes planned move England April Im looking forward big attempt think theyll make Adventures/Harrah continued page 61 gravity seems help projected wing stab area about 2000 sq loading about 10 ounces per square foot flying surface little high weak thermals will have hunt out some boomers long flights short engine runs lighter covering little sanding in-sight weight reduc tion would bring down between 7- 8-pound figure Great thermaling al A1 Packaged 2 Ft Size AND PRICE 5195Ipkg GAP LESS HINGE SLOTTER Makes Slots 4 Sizes Balsa %-Y-Ae /4 PRICE S195 FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 Phone 503 357 2732 though doesnt take away neat sport model 9 pounds no tricks mounting Proctor hardware spring mounted set cables maintain tension 2 4 pounds usually required type slow flying plane faster planes require overcome air pressure control surfaces about 6 pounds used one-spring method others use two two-spring method allows control surface deflection both directions case inadvertently moved reducing potential damage system Proctor fittings give finishing touch scale models very functional needed Naturally already guessed half Sig lumberyard went project availability straight-grained spruce large sheets 1/16 ply made building lot easier Jugs Titebond glue some Devcon Slow Cure epoxy Wilhold R/C56 glue wind shields used put together Williams Bros inverted U spear used guide tail wheel Du-Bro wheels Fox wheel fittings rounded out ground support Well Sunday morning perfect first flight engine started right up test glides range check engine running perfect Checked high low throttle nose held vertical could offer no excuse stay ground moment truth hand Ner vous Taxi fine increased rpm went left over-corrected rudder same time parted company ground surprised about 2/3 throttle airborne about 25 feet happened original design pop-off struts came back earth moment realized heading light standard No J4 sticking out Leroys head winding up picture missed itby inches Regaining some control myself plane put slow right turn left wing panel creasing its dihedral cut throttle off managed just clear trees could keep nose up headed slow right spin gave full left rudder full up elevator hoping pop wheels wheels did hit just before nose damage minor plane major pride Repairs now process snap-off struts being re placed working screw-mounted struts go back next flight time will spent ground taxiing did fly Taylorcraft things con sidered lot achieved learned K&B 61 experiments prop tests Proctor control systems surpassed ex pectations two failings both design other pilot error lucky have little repair learned found K&B engine Taylorcraft can wonderful sport-flying oombination Thanks Sterling Peanut version great old bird we-fly can magnificent horror over have go find Diana Cream Invader/Smith continued page 69 4 Slide tubes fuselage epoxy heavily after roughing od corner file glue areas 5 File end tubes flush side fuselage secure ballast strip plastic tape Radie Installatien 1 Installation shown Kraft radio other radio used essential same structural configuration used side rails cross rails Positions may altered suit radio 2 Shape side rails fit contour fuselage Use Hobbypoxy #2 gluing area Epoxy side rails place Fabricate lay out drill cross rails braces epoxy place 3 Loose-install servos align anchor front end cables control linkages Remove servos 4 Sand center seams fuselage smooth wet-or-dry sand entire fuselage re move orange peel effect gel coat Finishpaint fuselage sand canopy bottom needed obtain good fit cut out rear canopy clear control mechan ism Install hook canopy hooks servo rails Finish paint canopy 5 One Airtronics skid other suitable skid installed Install radio hook up linkages Assemble finished tail surfaces 122 Model Aviation Winning Ideas FOURMOST specialize WINNING Ideas AVIATION JEWELRY Largest Aircraft Jewelry Selection World CUSTOM JEWELRY SPECIALISTS Interested dealers full line airplane jewelry write PO Box 56CM JAddison Dallas Texas 75001 -Ph 214 596 3505 CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L051 Specialists brochure send 1 Sc stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 Slide glass wing rod tube marked CG suspend fuselage wing rod resting two blocks equal height table Lay 1 quarter 1 nickel 1 penny stab spar Add ballast nose tail necessary bring fuselage level Fill nose fuselage foam blocks anchor ballast Wing 1 Build right wing first Cover plan wax paper 2 Cut fit bottom 1/16 sheeting fit inboard plan exactly butt polyhedral joint flap joint Leave leading edge little short just line visible Pin down leading edge making sure stick exactly 3/16 Some sticks wider way other Use straightedge make sure stick pinned down straight 3 Pin down 3/16 X 1/4 sub spar using straightedge step 2 4 Ribs 1 through 13 too long Cut off back ends establish correct length assembly Drill ribs No 1 through 8 spoiler tube 5 Glue ribs #1 #12 place 6 Cut top bottom ar length cut angle polyhedral end shown both spars 7 Install bottom spar Hot Stuff end keep place 8 Ribs #2 through #11 cut two same spar cross sections differ rib out #6 rib Rib #2 has entire 3/ spar section removed Ribs #34 5 6 have ved back spar notch leave front section remaining ribs #7 through #11 have removed center spar notches Cut ribs keeping halves matched install leading edge D section ribs use ribs position spar rib notch Hot Stuff spar bottom sheeting 9 Cut spar vertical members match detail both wings Dry-install top bottom spar check wing rod tubes will fit necessary roll piece sandpaper line-sand holes tubes Tubes should slide holes freely may necessary trim front back vertical spar members slip between tubes Pin down through sheeting sure wing flat table 10 Trim rear sections ribs #2 #3 fit Hot Stuff place Remove vertical spar sections prepare enough Hobbypoxy #2 epoxy spars wingrod tubes Assemble vertical spar members tubes including rear brass tube 11 Trim install rear sections ribs #4 through #12 12 Install rubberhookand 1/16 X5/8X 1-15/16 plywood reinforcements 13 Install top spar #2 epoxy re-coat wing-rod tubes heavily along ribs #1 #2 joints Plug tube ends 14 Install 11 LE backup pieces 15 Drill diagonal ribs spoiler tube install 16 Layoutandcutnotchinribs#7#8 #9 #10 #11 3/16 X 3/16 balsa stick install stick flush top rib 17 Install spoiler tube attach bottom 3/16 stick notched block 3/16 balsa 18 Box spoiler bay 1/16 balsa sheet keep dirt out wing 19 Reinforce glue joints needed Titebond epoxy 20 Do sheet top time Flap 1 Cut two pieces 1/32 sheet balsa 2 wide 3/32 shorter inner wing panel both bottom sections flaps Cut two pieces 1/32 sheet balsa X 2-1/32 top sheeting 2 Notch corner bottom sheeting 1 wide X 15/16 long fit plywood inserts flap actuator slot 3 Pin down bottom sheet 4 Cut plywood inserts shown detail epoxy stack After set check slot will slip easily 1/16 rod Run drill through safety guide hole make loose slip fit guide pin Hot Stuff assembly place 5 Sand angle top flap spar match angle rib 6 Pin down flap spar being sure parallel wing sub spar Hot Stuff bottom sheeting 7 Cut 24 ribs per detail cutting strip 1/16 sheet balsa 30 wide Cut off pieces 1 3/4 long straightedge cut diagonally 8 Install ribs 9 Install top sheeting August 1979 123 new_ruleasos Bucker JUNGMEISTER radi nn*rni 020 rubb powerclukey 36 span 12 channel RIC tree flight S1495 3wingspan Seagullfor rubber available soon C02 power SEEYOURsend25Uor DEALER NOWcatalog FLYLINE MODELS INC 220317035732038 OS WANKEL ROTARY Hobby Barn Special $8999 SUPER TIGRE X-29 SPEED OFF Hobby Barn Special $3899 %P K&B61 RIC HB Special $5999 Hobby Barn PO Box 17856-M Tucson Arizona 85731 American Made ReadyTo Fly 1 High Quality 2 3 & 4 Channel RIC Models Are Really Ready Radio & Engine Choicel Shown example line CARDINAL Sport An excellent first aileron ship also flies well rudder Rud der-Elevator-Aileron Steerable nose wheel 3 4 channel 58 span 460 sq wing area 4 lb weight 20-22 oz wing loading average radio 25 35 eng 29 rec commended Balsa sheeted foam core wing wheel pants included installed SeeISSUE OT ~920 San ta Fe T rail complete FLfl wiju- story write address below complete info Lenexa KS 66215 913492-81331 SPOMODEL KITSANEV ERA RUSLICATION m. IAEROBATIC AIRPLANES /I8Y POST C MORRISON 45 PAGES SX II 52 PHOTOS / IS DETAILED DRAWINGS STRINGLESS WONDERON NITS 18only 5395 PLUS POSTAGE KIT $29579 CATALOG $100 KIT $3 95 GUIDE OF RUEBEE MODEL SUPPLIESCATALOGS 3100REPLATECH L INTERNATIONAL INC PPIPO BOX 2498-MA49800 MC KENZIE HWY Wec-yaesLA MESA CALIP 92041VIDA OREGON 97485 Outboard Wing 1 Cover plan wax paper 2 Butt inboard wing section out board section plan inboard section propped up near rib #4 indicated plan with2 block Align perfectly pin down Joint will built 3 Cut pin down 1/16 bottom sheet ing rib *13 rib #21 fit plan leaving leading edge line barely exposed 4 Cut pin down leading edge end use straightedge pin down between 5 Cut pruce bottom spar length lay placedo glue 6 Cutribsparnotchoutofribs #12 #13 allow spar splice install now 7 Glue ribs * 14 through #21 allow ing ribs position spar 8 Make four spar splices trimming 50 dihedral 9 Fit top spar epoxy splices place 10 Add short sub spar rib #13 rein forcement epoxy along rib #13 11 Cut add 1/16 balsa shear web both sides spar shown using scrap ends sheeting 12 Unpin trailing edge rib #19 #21 cut washout shims 3/16 balsa Slide rear shim under trailing edge wax paper Slide end shim under wax paper position under rib #21 13 Sheet top panel washout built 14 Wing tip added after leading edge shaped wing panel sanded 15 Build left wing point com pletion before sheeting inboard section using left wing reference Finishing Inboard Section 1 Again check good fill epoxy around wing rod tubes reinforcements Add epoxy needed 2 Sheet top carefully trim spoiler bay 3 Cut spoiler blade fit opening 4 Cut sand ribs spoiler bay become floor blade leaving blade above surface slightly allow sanding wing contour sand ribs let spoiler barely below surface wing Finishing Wing 1 Plane sand bottom leading edge sheeting shown end view wing full span 2 Radius leading edgemake gage keep radius uniform 3 Sand trailing edge top continue rib contour until trailing edge 1/16 thick 4 Wing tip instructions plan 5 Finish sand MonoKote wing 6 Install spoiler pull-string blades 7 Butt flap against wing align ends have clearance both ends Temporarily tape bottom scotch tape masking tape Fold flap down against under side wing lay mylar -wide tape over wing sub spar flap spar Raise flap neutral position tape along bottom joint removing temporary tape go Flying 1 Be sure CG correct 2 Check warps wing 3 Check controls work freely return neutral 4 Set stab rudder neutral 5 Make first hand-glide running attitude feel lift judge speed Throw straight level fairly hard get controls quickly get straight level fast can almost gnarantee trimmed perfectly 6 High-Start launchkeep up speed A Set full down trim stab 1 24 Model Aviation great schoolyard scale TRAVEL AIR 6OOO plus $200 postage 602-747-3633 B Obtain least 10 lbs pull highstart C Lower flaps ling edge D Throw hard nose up 300 450 get controls quickly correct turn too nose-high attitude Remember Invader flies faster sailpianes Keep speed up As launch progresses return stab trim neutral Begin hold slight up stab towards top launch until ready release Winch Launch Set stab rudder neutral Keep up speed B Lower flaps eload winch stand switch throw hard nose up 300 being careful lose balance Immediately start pulsing winch keep speed rela tively high until familiar launch/stall characteristics Dont try fantastic launches until get some practice first few flights used get familiar bird Fly straight level flaps launch position neutral stab trim feel out turns stalls Land flaps same position Flap Settings Launchdown trating trackingneutral Thermalingdown flap tight circle Let-down altitudefull flaps spoilers dive straight spiral 300 450 nose-down Landingwindy neutral Calm Trim LaunchHigh-start down Winch neutral Thermalingup required Penetratingslight down Landingneutral sailplane designed cover area Use way Dont park float unless known no lift around floating dynamic soaring order crank up trim determined experience fly gently few control movements possible thermaling keep turns flat possible again move controls needed nose tends drop tight turns requires up trim possibly some outside rudder Keep speed fairly high unless super lift up trim can help speed distance 8 oz 24 oz ballast required depending condi tions Eight oz ballast hardly affects sink rate sometimes used duration flights landing will skid landed flat however slight dork will nail spot throw dirt over top will stop Letters Editor continued page 5 fixtures floor lamps everything goes right can wind have Midwest winder mounted suction cup vise launch retrieve leaving chair old mans flying.. Wouldnt fun have contest winner contestant 1 minute flights during shindig everybody flys winds etc dont need timers need counters L F Randolph Dallas TX Sanity Pylon Sanity Racing nice article have concluded rules making procedure too democratic fellow Kilsdonk comes U/C speed completely undoes what lot us have doing pylon has com pletely different frame reference trying turn fun event specialist event won machine shop Unfortunately history AMA events net result shall use own WILLI rules continue have fun Frank B Baker Madison WI As know afamiliarprob tern No matter what ideals attach founding new eventbeginners fun etctechnical aspects attendant skill levels remorsely escalate nature competition note group clubs intends hang onto own special-event rules have effec tive attracting new pylon fliers Nor can blame Big John doing what comes naturally food thought.. Export Messerschmitt January issue Model Aviation free flight column page 61 published picture Bill Noonan Messerschmitt 20B stated plan published MA Although have subscription 1979 issues have yet received issue giving further details plan should glad could let know will available reason later year will holding rubber scale contest England probably Nationals would seem fine example such contest However time getting bit short way could let have copy plan quickly would grateful knowing much will cost cannot send money stage would gladly hearing what worth would mention am Editor SMAE NEWS Needless say think maga zine excellentit far superior anyAugust 1979 125 PRESENTING THE OCTURA F MOTOR MOUNT Almost quickly can say Swift Switch CHANGE FROM 60 TO 45 ENGINE OR VICE VERSA WITHOUT REMOVING THE ENTIRE MOUNT FROM HULL THE INSERT ON WHICH ENGINE IS MOUNTED! Featur d minimum parts Strong light extruded aluminum onepiece base onepiece insert 5 wide Interchanges Octura 556 5-60 Motor Mounts Ideally suited deep vee hulls Insert deep enough accomodate 65 engines Price $1550 per assembly md insert Additional inserts $550 sa Inserts sized drilled tapped popular marine engines $750 ea Order directly Only available local hobby dealer add 10% poatage Illinois residents add additional 5/ sales tao Send 5OZ catalOg OCTURA MODELS INC price list Celebrating 25th year 7351 N Hamlin Ave ie IL 60076 OCT I MODEL MARINE SUPPLIES SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1979/08
Page Numbers: 65, 66, 67, 68, 69, 122, 123, 124, 125
NO OCR TEXT THE Invader has flying four years now beginning much simpler sailplane same basic design MK IV has gone through four stages develop ment better performance structural strength until now what believe super competition sailplane will take Preceding page Beautiful young lady Herbs daughter Christine Martin beautiful sailplane azure skies snowcapped peaks Colorado Rockies delightful photo other pictures Maurice Kaiser punishment can give Its 1978 performance speaks itself have flown itto become 1978 Rocky Moun tain Soaring Association club champion attained rank Master Flyer 1st place 1978 LSF Regional Tournament 8th place FM USA Team Selection finals 1st place four RMSA AMA contests 1st place Pikes Peak RC contest several 2nd places has competition host formidable opponents RMSA including Skip Miller mention 40 best Pensacola initial concept came about through evaluation contest tasks both AMA FAI goal being design sail plane capable performing well tasks weather conditions boiled down five requirements must light-air floater must super strong must fast speed tasks must able penetrate wind have good L/D ratio distance thermal 66 Model Aviation Construction poly break before top sheeting has bean added Compare plan top view sea spar cross sections along plan top construction wing root before top sheeting ply pieces three glass tubee spar locked togetherrubber hook just aft Attop lathe basic frame ruddernote sturdy hinging arrangement mount small fin Below half all-flying stab servo rail arrangement shown detailed plan Rails spruce laminated ply cross pieces Servo positions throws given Convenient-to-use ballast tubes rest spruce cradle seen three circular openings just above two hookthis captured Fin ruggedly built tuselage plans OCtIl uaisa Talring blocks minimize disturbed air fin/stabilizer junction Rudder clevis shows FULL SIZE PLANS AVAILABLE. SEE PAGE 128 _-_ _I_ _ _ _ ___ _ _1_J88848~ jJ _ _ _K L4 INVADER MK N S 888888888 88888C838008T880888880888 OS 880888 888 888 8 8 888888 8A880C8808/8O8C7y8--- 8- 8NE8O8 88888B SO-IS88888 8083888888888808 88888888 51188 88888080888888 -8888888V888f} 848888888884 8 88 8 8888888 88888 L8888888888J ffl882c888 88 83V888888880~ INVADER MK& hunting ribs plus 1/16 sheeting entire wing altitude high-speed dives fear accomplished starting virtually bullet-proofflutter full flap spoilers can super clean airframe speed LID course beef adds weightbe brought down moderate dive low ratio Large flaps change airfoil camberwhich ends up 85 oz per sq ft wingspeed Getting down never problem full-flying stab change angle attackloading have found simply makes MK IV free flight must floating light air As strength thethe plane fly faster lets airfoil workbe flown time except super calm entire sailplane just strong Especi-at higher Reynolds number rate itair mainly because reacts slightest ally wing has super sparis still floaterdisturbance air still very stable diagonal ribbing addition conventional MK IV can brought down fromespecially very high speeds very August 1979 67 Spoiler wade snown enenaea Iross section aT spoiler detail plans shows actuation methodfitting under spoiler may seen picture wing panel joins fuselage Note generous flap left picture Combo flap flying tail broadens performance range respon Flowris very docile siinter mediate competition sa Try snap roll just give full ups hold let wh fun barrel mor Instructioni Fin Rudder Assemble spars hinge assembly 1 Rudder sparsi18 X 1/4 spruce 2 pieces Notch hinge tab tions spars contact c hinge tabs sandwiched between 2 Fin spars 2 spruce 2 pieces Same step 3 Dry-run-assemble fin spar rudder spar hinges 3/32 piano wire hinge pin place Clamp together Check hinge positions free movement satis fied epoxy 5 minutes slow dry spar hinge units being careful get epoxy hinge bearings Note Some hinge holes tighter others may necessitate making pin smaller chuck pm drill polish down using 400 320 wet dry paper Carve clearance opposite hinge bosses fin rudder spars 4 Assemble fin first Put wax paper plan Assemble inner frame first consists fin/spar hinge assembly bottom X ce piece 3/32 hole drilled position shown control cable housing accurately possible location hole 3 pieces alsa Epoxy unit together wipe excess off top sticks B Remove plan dry add thick balsa fillet front fin airfoil time C Trim top hinge tab clear stab hinge tube trying 1/32 plywood side brass tube through hole Trim sand top edges 1/32 plywood sides align top stab boss comparing plan brass tube through hole both side pieces alignment neutral position stab D Rough outer stab cable housing areas epoxy 4 spruce top housing exact and exact contour shown un balsa stick needed -dry-assemble two ass tube place against fin vi through vood su h 1 thinly dure extenos w two ways F wo stab boss leu stab hinge tube sure hole 5/16 sides boss Glue both parts ii being careful make top parallel ood G Sheet fin above stab 1/16 balsa Cut radius slot front stab rod brass tube 1 radius rear hinge hole Allow full el way After stab assembled check moves freely necessary widen radius slot H Airfoil leading edge fix fuselage time Will covered fuselage instructions Rudder 1 Cover plan wax paper 2 Make shims shown right ruddi 4 Pin down TE shims shown being sure 1/32 pad 1/16 inside rear plan shown 5 Cut TE stock top piece pin glue place Trim top piece after rudder removed plan 6 Cut remaining perimeter sticks pin place using proper shims glue Note 1/8 X 3/16 stick just above fin should fit around hinge boss epoxied along gusset 7 Cut fit glue diagonal rib sticks being sure use shims under end 8 Remove plan cut two pieces pruce control horn boss Notch inside slightly two pieces will andwich over hinge tab epoxy plan wax E stock4pcstofit s 1/32 base type Pin glue TE place ut pin glue LE tip pieces Use 1/32 shims under LE 3 Cut two pieces 1/8 X 3/16 balsa about 3 long Stack together mark hole locations too far end 1 center-to-center dimensions should accurate possible Holes should cen tered stick drilled square through sticks Mark top sticks keep inverting assembly still pinned together trim ends position holes correct distance end glue place time 4 Squeeze s tubes about pliersvery slightly File sand radius ends stab rods push through tube until will push through snugly Remember will two rods place assembly therefore twice hold ing power keep stab rods 5 Insert brass tubes drilled sticks squeezed ends outboard check alignment sure ends tubes flush sticks pin glue assembly place holes well centered sticks place 1/32 shim under outboard ends tubes sure tubes square plan parallel 6 Cut two 1/8 X 3/16 balsa sticks butt outboard ends tubes glue place Cut 4 pieces 1/8 X 3/16 balsa fit along 68 Model Aviation control horn position bottom rudder e line up control r e should ce n ton glue 11 Fi1 sande stick plan 3 Pin rudder spar hinge assembly place fiat plan establishes center line e plan Behind recelverand batterythe fourservos oompactiyarrangedagain check rail planform detail top L R rudder fiap servos bottom L R Stab spoilerltow hook servos tide o epoxy entire stress e 1/16 X 3/16 cross place flat plan rners - ut 1/16 spars piec shape desired cross sticks 1/16 sq balsa sanded sym Lrical airfoil 11 Radius LE finish-sand covering Fuselage 1 Drill file elongated slot left rear side wing boss permit entry spruce cross brace Insert spruce through slot until butts opposite side mark stick Remove cut notch 3/16 deep about 1/32 inside mark re-insert stick check length Trim fit until will bear against both sides Epoxy place after set cut off flush wing boss 2 Rough 3/32 X 2-9/16 brass tube corner file epoxy rear wing rod hole Install two fiberglass tubes epoxy prom inside Cutandfit X cecrossbraceat wing boss Keep high location r clear spoiler pull Epoxy assembly Use acid horn 3/32 X fl centerline neces t bolt tuuCs Sc prevent B Snap ends brass tube fuselage Use 1 guide through fuselage hole bly through canopy opening rod handle slip steel roa tube guide hole side fuselage Use little pressure wiggle tube too long may filed shorter minimum 2/s must extend 1/32 out side fuselage ticklish job will go patience may necessary file bevel end brass tube Once tube has entered side slide steel rod through both sides fuselage slide brass tube through other side C Bend 1/16 piano wire 2 pcs 900 7/8 long shown detail Clean inside brass tube acetone alcohol pushing small saturated piece tissue paper through hole Use soldering gun acid core solder unit Cut small pieces solder insert end tube trying get some acid Hold soldering gun end tube melt solder tin inside tube same other end Rough ends 1/16 wire fit brass tube tin solder D Clamp tape control rod hold control horn position slightly aft straight down point need helper pair pliers Center brass tube fuselage extend equally side fuselage Have helper hold fuselage steady hold end brass tube sliding Slip brass washer opposite end hold bent wire pliers end wire Heat tinned end holdingagainst end brass tube till solder melts wire begins slide Apply solder push wire tion parallel bottom wing boss Hold heat till sure solder has flowed inside tube Continue holding wire till solder changes color indicating solid E Release control rod capture side just soldered slip piece cardboard piece paper folded 5 6 thicknesses about 1/64 between washer fuselage tape place provide end play through fuselage Cut 3/16 X 3/8 spruce side rails length shown plan use alignment tools solder other flap wire place Slide rod through rear wing rod tube soldered side place spruce stick top flap wire extend under wing rod hold place two clothes pins small clamps Clamp very lightly crush spruce causing misalignment Again cap ture control rod before have helper hold fuselage flap wire just soldered will pushed through Clamp other wire spruce stick slip brass washer hold wire against tube holding ruce up under wing rod matching other soldering gun repeat pro other side 3 sloppy loose us iides slide hole slot return Assemble Fin 1 Drill hole top ruse control cable Hole may up -i 2 Try fin fit Spar should butt ens fuselage bottom hinge tab slide insiae 3 Insert long wing rod wing rod tube tape centered 4 Slip stab rod stab hinge hole sight wing rod level Use straight edge down side fm center compare seam fuselage 5 Remove flat file top fuselage fin contacts Coat contact area 5-minute epoxy repeat operation No4 Hold hand keep checking alignment till epoxy sets 6 Fillet fin fuselage epoxy 7 Epoxy stab control inside fuselage shown through rear fuselage Tail Cone Skid 1 Cut notch balsa block 9/16 deep fit over fin spar hinge Slip block place press hard against end fuse lage Pencil mark diameter fuselage end block Remove make circular cut 1/32 deep 1/8 front block Carve step end block slip inside fuselage cutting approximately 1/32 inside fuselage mark end block Re-coat fin spar epoxy coat contact areas block install 2 Carve block shape sand 3 Cut skid shape radius notch fit clear rudder pin Skid will off center File groove around end rudder pin help removal Epoxy skid place safety pin should used keep rudder pin coming out Rudder Control Cable 1 Cable may exited left right side depending servo travel Drill 5/32 hole centerline exit shown plan approximately centerline fuselage w top fuselage 2/s end fuselage 2 With small round file angle exit hole till cable housing will exit straight line towards rudder horn 3 Epoxy place end housing 2 m end fuselage other end running under flap actuator tube over ballast tubes Stab actuator cable follows same route Tow Hook 1 Position shown plane op timum performancesee flight instructions 2 Fabricated hook shown sufficient serious competition capture tow hook advised should actuated spoiler servo Ballast Tubes Optional Should Ys od thin wall aluminum ardware store oles location shown high bottom wing left side die match holes ide fuselage 1/32 clear slug weighs appr Jontinu ld after age 122 August 1979 69 glue inbor c Two Sizes % ID 10 PRICE 2 lengths Comes ig two STUT FAIRINGS 3 Lengths fairings iiir size 225 cockpit coammn~ -r y COMES IN 3 FT LENGTHS SMALL 118 OR LARGE 114 THIS HINGE COMPLETELY SEALS CONTROL SURFACE AIR LOSS STRONG FLEXIBLE HINGE THAT IS ABLE TO MOVE ooney gapless hinges --* drive shaft broken classical failure mode tubular member under excessive torsional stress After brief discussion decided pull off propeller make hand-launched Gossa mer Glider Two assistants ran along side handles Bryan flew back hangar Paul assessed situation resolved replace drive shaft aluminum did temporarily present version has GFRP drive shaft Much additional work has done complete set spare parts has built enough build entire second aircraft Bryan has continued physical training designed peak first break weather over English channel Plans suitable hangar near Dover have abandoned since team can set up now five minutes planned move England April Im looking forward big attempt think theyll make Adventures/Harrah continued page 61 gravity seems help projected wing stab area about 2000 sq loading about 10 ounces per square foot flying surface little high weak thermals will have hunt out some boomers long flights short engine runs lighter covering little sanding in-sight weight reduc tion would bring down between 7- 8-pound figure Great thermaling al A1 Packaged 2 Ft Size AND PRICE 5195Ipkg GAP LESS HINGE SLOTTER Makes Slots 4 Sizes Balsa %-Y-Ae /4 PRICE S195 FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 Phone 503 357 2732 though doesnt take away neat sport model 9 pounds no tricks mounting Proctor hardware spring mounted set cables maintain tension 2 4 pounds usually required type slow flying plane faster planes require overcome air pressure control surfaces about 6 pounds used one-spring method others use two two-spring method allows control surface deflection both directions case inadvertently moved reducing potential damage system Proctor fittings give finishing touch scale models very functional needed Naturally already guessed half Sig lumberyard went project availability straight-grained spruce large sheets 1/16 ply made building lot easier Jugs Titebond glue some Devcon Slow Cure epoxy Wilhold R/C56 glue wind shields used put together Williams Bros inverted U spear used guide tail wheel Du-Bro wheels Fox wheel fittings rounded out ground support Well Sunday morning perfect first flight engine started right up test glides range check engine running perfect Checked high low throttle nose held vertical could offer no excuse stay ground moment truth hand Ner vous Taxi fine increased rpm went left over-corrected rudder same time parted company ground surprised about 2/3 throttle airborne about 25 feet happened original design pop-off struts came back earth moment realized heading light standard No J4 sticking out Leroys head winding up picture missed itby inches Regaining some control myself plane put slow right turn left wing panel creasing its dihedral cut throttle off managed just clear trees could keep nose up headed slow right spin gave full left rudder full up elevator hoping pop wheels wheels did hit just before nose damage minor plane major pride Repairs now process snap-off struts being re placed working screw-mounted struts go back next flight time will spent ground taxiing did fly Taylorcraft things con sidered lot achieved learned K&B 61 experiments prop tests Proctor control systems surpassed ex pectations two failings both design other pilot error lucky have little repair learned found K&B engine Taylorcraft can wonderful sport-flying oombination Thanks Sterling Peanut version great old bird we-fly can magnificent horror over have go find Diana Cream Invader/Smith continued page 69 4 Slide tubes fuselage epoxy heavily after roughing od corner file glue areas 5 File end tubes flush side fuselage secure ballast strip plastic tape Radie Installatien 1 Installation shown Kraft radio other radio used essential same structural configuration used side rails cross rails Positions may altered suit radio 2 Shape side rails fit contour fuselage Use Hobbypoxy #2 gluing area Epoxy side rails place Fabricate lay out drill cross rails braces epoxy place 3 Loose-install servos align anchor front end cables control linkages Remove servos 4 Sand center seams fuselage smooth wet-or-dry sand entire fuselage re move orange peel effect gel coat Finishpaint fuselage sand canopy bottom needed obtain good fit cut out rear canopy clear control mechan ism Install hook canopy hooks servo rails Finish paint canopy 5 One Airtronics skid other suitable skid installed Install radio hook up linkages Assemble finished tail surfaces 122 Model Aviation Winning Ideas FOURMOST specialize WINNING Ideas AVIATION JEWELRY Largest Aircraft Jewelry Selection World CUSTOM JEWELRY SPECIALISTS Interested dealers full line airplane jewelry write PO Box 56CM JAddison Dallas Texas 75001 -Ph 214 596 3505 CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L051 Specialists brochure send 1 Sc stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 Slide glass wing rod tube marked CG suspend fuselage wing rod resting two blocks equal height table Lay 1 quarter 1 nickel 1 penny stab spar Add ballast nose tail necessary bring fuselage level Fill nose fuselage foam blocks anchor ballast Wing 1 Build right wing first Cover plan wax paper 2 Cut fit bottom 1/16 sheeting fit inboard plan exactly butt polyhedral joint flap joint Leave leading edge little short just line visible Pin down leading edge making sure stick exactly 3/16 Some sticks wider way other Use straightedge make sure stick pinned down straight 3 Pin down 3/16 X 1/4 sub spar using straightedge step 2 4 Ribs 1 through 13 too long Cut off back ends establish correct length assembly Drill ribs No 1 through 8 spoiler tube 5 Glue ribs #1 #12 place 6 Cut top bottom ar length cut angle polyhedral end shown both spars 7 Install bottom spar Hot Stuff end keep place 8 Ribs #2 through #11 cut two same spar cross sections differ rib out #6 rib Rib #2 has entire 3/ spar section removed Ribs #34 5 6 have ved back spar notch leave front section remaining ribs #7 through #11 have removed center spar notches Cut ribs keeping halves matched install leading edge D section ribs use ribs position spar rib notch Hot Stuff spar bottom sheeting 9 Cut spar vertical members match detail both wings Dry-install top bottom spar check wing rod tubes will fit necessary roll piece sandpaper line-sand holes tubes Tubes should slide holes freely may necessary trim front back vertical spar members slip between tubes Pin down through sheeting sure wing flat table 10 Trim rear sections ribs #2 #3 fit Hot Stuff place Remove vertical spar sections prepare enough Hobbypoxy #2 epoxy spars wingrod tubes Assemble vertical spar members tubes including rear brass tube 11 Trim install rear sections ribs #4 through #12 12 Install rubberhookand 1/16 X5/8X 1-15/16 plywood reinforcements 13 Install top spar #2 epoxy re-coat wing-rod tubes heavily along ribs #1 #2 joints Plug tube ends 14 Install 11 LE backup pieces 15 Drill diagonal ribs spoiler tube install 16 Layoutandcutnotchinribs#7#8 #9 #10 #11 3/16 X 3/16 balsa stick install stick flush top rib 17 Install spoiler tube attach bottom 3/16 stick notched block 3/16 balsa 18 Box spoiler bay 1/16 balsa sheet keep dirt out wing 19 Reinforce glue joints needed Titebond epoxy 20 Do sheet top time Flap 1 Cut two pieces 1/32 sheet balsa 2 wide 3/32 shorter inner wing panel both bottom sections flaps Cut two pieces 1/32 sheet balsa X 2-1/32 top sheeting 2 Notch corner bottom sheeting 1 wide X 15/16 long fit plywood inserts flap actuator slot 3 Pin down bottom sheet 4 Cut plywood inserts shown detail epoxy stack After set check slot will slip easily 1/16 rod Run drill through safety guide hole make loose slip fit guide pin Hot Stuff assembly place 5 Sand angle top flap spar match angle rib 6 Pin down flap spar being sure parallel wing sub spar Hot Stuff bottom sheeting 7 Cut 24 ribs per detail cutting strip 1/16 sheet balsa 30 wide Cut off pieces 1 3/4 long straightedge cut diagonally 8 Install ribs 9 Install top sheeting August 1979 123 new_ruleasos Bucker JUNGMEISTER radi nn*rni 020 rubb powerclukey 36 span 12 channel RIC tree flight S1495 3wingspan Seagullfor rubber available soon C02 power SEEYOURsend25Uor DEALER NOWcatalog FLYLINE MODELS INC 220317035732038 OS WANKEL ROTARY Hobby Barn Special $8999 SUPER TIGRE X-29 SPEED OFF Hobby Barn Special $3899 %P K&B61 RIC HB Special $5999 Hobby Barn PO Box 17856-M Tucson Arizona 85731 American Made ReadyTo Fly 1 High Quality 2 3 & 4 Channel RIC Models Are Really Ready Radio & Engine Choicel Shown example line CARDINAL Sport An excellent first aileron ship also flies well rudder Rud der-Elevator-Aileron Steerable nose wheel 3 4 channel 58 span 460 sq wing area 4 lb weight 20-22 oz wing loading average radio 25 35 eng 29 rec commended Balsa sheeted foam core wing wheel pants included installed SeeISSUE OT ~920 San ta Fe T rail complete FLfl wiju- story write address below complete info Lenexa KS 66215 913492-81331 SPOMODEL KITSANEV ERA RUSLICATION m. IAEROBATIC AIRPLANES /I8Y POST C MORRISON 45 PAGES SX II 52 PHOTOS / IS DETAILED DRAWINGS STRINGLESS WONDERON NITS 18only 5395 PLUS POSTAGE KIT $29579 CATALOG $100 KIT $3 95 GUIDE OF RUEBEE MODEL SUPPLIESCATALOGS 3100REPLATECH L INTERNATIONAL INC PPIPO BOX 2498-MA49800 MC KENZIE HWY Wec-yaesLA MESA CALIP 92041VIDA OREGON 97485 Outboard Wing 1 Cover plan wax paper 2 Butt inboard wing section out board section plan inboard section propped up near rib #4 indicated plan with2 block Align perfectly pin down Joint will built 3 Cut pin down 1/16 bottom sheet ing rib *13 rib #21 fit plan leaving leading edge line barely exposed 4 Cut pin down leading edge end use straightedge pin down between 5 Cut pruce bottom spar length lay placedo glue 6 Cutribsparnotchoutofribs #12 #13 allow spar splice install now 7 Glue ribs * 14 through #21 allow ing ribs position spar 8 Make four spar splices trimming 50 dihedral 9 Fit top spar epoxy splices place 10 Add short sub spar rib #13 rein forcement epoxy along rib #13 11 Cut add 1/16 balsa shear web both sides spar shown using scrap ends sheeting 12 Unpin trailing edge rib #19 #21 cut washout shims 3/16 balsa Slide rear shim under trailing edge wax paper Slide end shim under wax paper position under rib #21 13 Sheet top panel washout built 14 Wing tip added after leading edge shaped wing panel sanded 15 Build left wing point com pletion before sheeting inboard section using left wing reference Finishing Inboard Section 1 Again check good fill epoxy around wing rod tubes reinforcements Add epoxy needed 2 Sheet top carefully trim spoiler bay 3 Cut spoiler blade fit opening 4 Cut sand ribs spoiler bay become floor blade leaving blade above surface slightly allow sanding wing contour sand ribs let spoiler barely below surface wing Finishing Wing 1 Plane sand bottom leading edge sheeting shown end view wing full span 2 Radius leading edgemake gage keep radius uniform 3 Sand trailing edge top continue rib contour until trailing edge 1/16 thick 4 Wing tip instructions plan 5 Finish sand MonoKote wing 6 Install spoiler pull-string blades 7 Butt flap against wing align ends have clearance both ends Temporarily tape bottom scotch tape masking tape Fold flap down against under side wing lay mylar -wide tape over wing sub spar flap spar Raise flap neutral position tape along bottom joint removing temporary tape go Flying 1 Be sure CG correct 2 Check warps wing 3 Check controls work freely return neutral 4 Set stab rudder neutral 5 Make first hand-glide running attitude feel lift judge speed Throw straight level fairly hard get controls quickly get straight level fast can almost gnarantee trimmed perfectly 6 High-Start launchkeep up speed A Set full down trim stab 1 24 Model Aviation great schoolyard scale TRAVEL AIR 6OOO plus $200 postage 602-747-3633 B Obtain least 10 lbs pull highstart C Lower flaps ling edge D Throw hard nose up 300 450 get controls quickly correct turn too nose-high attitude Remember Invader flies faster sailpianes Keep speed up As launch progresses return stab trim neutral Begin hold slight up stab towards top launch until ready release Winch Launch Set stab rudder neutral Keep up speed B Lower flaps eload winch stand switch throw hard nose up 300 being careful lose balance Immediately start pulsing winch keep speed rela tively high until familiar launch/stall characteristics Dont try fantastic launches until get some practice first few flights used get familiar bird Fly straight level flaps launch position neutral stab trim feel out turns stalls Land flaps same position Flap Settings Launchdown trating trackingneutral Thermalingdown flap tight circle Let-down altitudefull flaps spoilers dive straight spiral 300 450 nose-down Landingwindy neutral Calm Trim LaunchHigh-start down Winch neutral Thermalingup required Penetratingslight down Landingneutral sailplane designed cover area Use way Dont park float unless known no lift around floating dynamic soaring order crank up trim determined experience fly gently few control movements possible thermaling keep turns flat possible again move controls needed nose tends drop tight turns requires up trim possibly some outside rudder Keep speed fairly high unless super lift up trim can help speed distance 8 oz 24 oz ballast required depending condi tions Eight oz ballast hardly affects sink rate sometimes used duration flights landing will skid landed flat however slight dork will nail spot throw dirt over top will stop Letters Editor continued page 5 fixtures floor lamps everything goes right can wind have Midwest winder mounted suction cup vise launch retrieve leaving chair old mans flying.. Wouldnt fun have contest winner contestant 1 minute flights during shindig everybody flys winds etc dont need timers need counters L F Randolph Dallas TX Sanity Pylon Sanity Racing nice article have concluded rules making procedure too democratic fellow Kilsdonk comes U/C speed completely undoes what lot us have doing pylon has com pletely different frame reference trying turn fun event specialist event won machine shop Unfortunately history AMA events net result shall use own WILLI rules continue have fun Frank B Baker Madison WI As know afamiliarprob tern No matter what ideals attach founding new eventbeginners fun etctechnical aspects attendant skill levels remorsely escalate nature competition note group clubs intends hang onto own special-event rules have effec tive attracting new pylon fliers Nor can blame Big John doing what comes naturally food thought.. Export Messerschmitt January issue Model Aviation free flight column page 61 published picture Bill Noonan Messerschmitt 20B stated plan published MA Although have subscription 1979 issues have yet received issue giving further details plan should glad could let know will available reason later year will holding rubber scale contest England probably Nationals would seem fine example such contest However time getting bit short way could let have copy plan quickly would grateful knowing much will cost cannot send money stage would gladly hearing what worth would mention am Editor SMAE NEWS Needless say think maga zine excellentit far superior anyAugust 1979 125 PRESENTING THE OCTURA F MOTOR MOUNT Almost quickly can say Swift Switch CHANGE FROM 60 TO 45 ENGINE OR VICE VERSA WITHOUT REMOVING THE ENTIRE MOUNT FROM HULL THE INSERT ON WHICH ENGINE IS MOUNTED! Featur d minimum parts Strong light extruded aluminum onepiece base onepiece insert 5 wide Interchanges Octura 556 5-60 Motor Mounts Ideally suited deep vee hulls Insert deep enough accomodate 65 engines Price $1550 per assembly md insert Additional inserts $550 sa Inserts sized drilled tapped popular marine engines $750 ea Order directly Only available local hobby dealer add 10% poatage Illinois residents add additional 5/ sales tao Send 5OZ catalOg OCTURA MODELS INC price list Celebrating 25th year 7351 N Hamlin Ave ie IL 60076 OCT I MODEL MARINE SUPPLIES SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1979/08
Page Numbers: 65, 66, 67, 68, 69, 122, 123, 124, 125
NO OCR TEXT THE Invader has flying four years now beginning much simpler sailplane same basic design MK IV has gone through four stages develop ment better performance structural strength until now what believe super competition sailplane will take Preceding page Beautiful young lady Herbs daughter Christine Martin beautiful sailplane azure skies snowcapped peaks Colorado Rockies delightful photo other pictures Maurice Kaiser punishment can give Its 1978 performance speaks itself have flown itto become 1978 Rocky Moun tain Soaring Association club champion attained rank Master Flyer 1st place 1978 LSF Regional Tournament 8th place FM USA Team Selection finals 1st place four RMSA AMA contests 1st place Pikes Peak RC contest several 2nd places has competition host formidable opponents RMSA including Skip Miller mention 40 best Pensacola initial concept came about through evaluation contest tasks both AMA FAI goal being design sail plane capable performing well tasks weather conditions boiled down five requirements must light-air floater must super strong must fast speed tasks must able penetrate wind have good L/D ratio distance thermal 66 Model Aviation Construction poly break before top sheeting has bean added Compare plan top view sea spar cross sections along plan top construction wing root before top sheeting ply pieces three glass tubee spar locked togetherrubber hook just aft Attop lathe basic frame ruddernote sturdy hinging arrangement mount small fin Below half all-flying stab servo rail arrangement shown detailed plan Rails spruce laminated ply cross pieces Servo positions throws given Convenient-to-use ballast tubes rest spruce cradle seen three circular openings just above two hookthis captured Fin ruggedly built tuselage plans OCtIl uaisa Talring blocks minimize disturbed air fin/stabilizer junction Rudder clevis shows FULL SIZE PLANS AVAILABLE. SEE PAGE 128 _-_ _I_ _ _ _ ___ _ _1_J88848~ jJ _ _ _K L4 INVADER MK N S 888888888 88888C838008T880888880888 OS 880888 888 888 8 8 888888 8A880C8808/8O8C7y8--- 8- 8NE8O8 88888B SO-IS88888 8083888888888808 88888888 51188 88888080888888 -8888888V888f} 848888888884 8 88 8 8888888 88888 L8888888888J ffl882c888 88 83V888888880~ INVADER MK& hunting ribs plus 1/16 sheeting entire wing altitude high-speed dives fear accomplished starting virtually bullet-proofflutter full flap spoilers can super clean airframe speed LID course beef adds weightbe brought down moderate dive low ratio Large flaps change airfoil camberwhich ends up 85 oz per sq ft wingspeed Getting down never problem full-flying stab change angle attackloading have found simply makes MK IV free flight must floating light air As strength thethe plane fly faster lets airfoil workbe flown time except super calm entire sailplane just strong Especi-at higher Reynolds number rate itair mainly because reacts slightest ally wing has super sparis still floaterdisturbance air still very stable diagonal ribbing addition conventional MK IV can brought down fromespecially very high speeds very August 1979 67 Spoiler wade snown enenaea Iross section aT spoiler detail plans shows actuation methodfitting under spoiler may seen picture wing panel joins fuselage Note generous flap left picture Combo flap flying tail broadens performance range respon Flowris very docile siinter mediate competition sa Try snap roll just give full ups hold let wh fun barrel mor Instructioni Fin Rudder Assemble spars hinge assembly 1 Rudder sparsi18 X 1/4 spruce 2 pieces Notch hinge tab tions spars contact c hinge tabs sandwiched between 2 Fin spars 2 spruce 2 pieces Same step 3 Dry-run-assemble fin spar rudder spar hinges 3/32 piano wire hinge pin place Clamp together Check hinge positions free movement satis fied epoxy 5 minutes slow dry spar hinge units being careful get epoxy hinge bearings Note Some hinge holes tighter others may necessitate making pin smaller chuck pm drill polish down using 400 320 wet dry paper Carve clearance opposite hinge bosses fin rudder spars 4 Assemble fin first Put wax paper plan Assemble inner frame first consists fin/spar hinge assembly bottom X ce piece 3/32 hole drilled position shown control cable housing accurately possible location hole 3 pieces alsa Epoxy unit together wipe excess off top sticks B Remove plan dry add thick balsa fillet front fin airfoil time C Trim top hinge tab clear stab hinge tube trying 1/32 plywood side brass tube through hole Trim sand top edges 1/32 plywood sides align top stab boss comparing plan brass tube through hole both side pieces alignment neutral position stab D Rough outer stab cable housing areas epoxy 4 spruce top housing exact and exact contour shown un balsa stick needed -dry-assemble two ass tube place against fin vi through vood su h 1 thinly dure extenos w two ways F wo stab boss leu stab hinge tube sure hole 5/16 sides boss Glue both parts ii being careful make top parallel ood G Sheet fin above stab 1/16 balsa Cut radius slot front stab rod brass tube 1 radius rear hinge hole Allow full el way After stab assembled check moves freely necessary widen radius slot H Airfoil leading edge fix fuselage time Will covered fuselage instructions Rudder 1 Cover plan wax paper 2 Make shims shown right ruddi 4 Pin down TE shims shown being sure 1/32 pad 1/16 inside rear plan shown 5 Cut TE stock top piece pin glue place Trim top piece after rudder removed plan 6 Cut remaining perimeter sticks pin place using proper shims glue Note 1/8 X 3/16 stick just above fin should fit around hinge boss epoxied along gusset 7 Cut fit glue diagonal rib sticks being sure use shims under end 8 Remove plan cut two pieces pruce control horn boss Notch inside slightly two pieces will andwich over hinge tab epoxy plan wax E stock4pcstofit s 1/32 base type Pin glue TE place ut pin glue LE tip pieces Use 1/32 shims under LE 3 Cut two pieces 1/8 X 3/16 balsa about 3 long Stack together mark hole locations too far end 1 center-to-center dimensions should accurate possible Holes should cen tered stick drilled square through sticks Mark top sticks keep inverting assembly still pinned together trim ends position holes correct distance end glue place time 4 Squeeze s tubes about pliersvery slightly File sand radius ends stab rods push through tube until will push through snugly Remember will two rods place assembly therefore twice hold ing power keep stab rods 5 Insert brass tubes drilled sticks squeezed ends outboard check alignment sure ends tubes flush sticks pin glue assembly place holes well centered sticks place 1/32 shim under outboard ends tubes sure tubes square plan parallel 6 Cut two 1/8 X 3/16 balsa sticks butt outboard ends tubes glue place Cut 4 pieces 1/8 X 3/16 balsa fit along 68 Model Aviation control horn position bottom rudder e line up control r e should ce n ton glue 11 Fi1 sande stick plan 3 Pin rudder spar hinge assembly place fiat plan establishes center line e plan Behind recelverand batterythe fourservos oompactiyarrangedagain check rail planform detail top L R rudder fiap servos bottom L R Stab spoilerltow hook servos tide o epoxy entire stress e 1/16 X 3/16 cross place flat plan rners - ut 1/16 spars piec shape desired cross sticks 1/16 sq balsa sanded sym Lrical airfoil 11 Radius LE finish-sand covering Fuselage 1 Drill file elongated slot left rear side wing boss permit entry spruce cross brace Insert spruce through slot until butts opposite side mark stick Remove cut notch 3/16 deep about 1/32 inside mark re-insert stick check length Trim fit until will bear against both sides Epoxy place after set cut off flush wing boss 2 Rough 3/32 X 2-9/16 brass tube corner file epoxy rear wing rod hole Install two fiberglass tubes epoxy prom inside Cutandfit X cecrossbraceat wing boss Keep high location r clear spoiler pull Epoxy assembly Use acid horn 3/32 X fl centerline neces t bolt tuuCs Sc prevent B Snap ends brass tube fuselage Use 1 guide through fuselage hole bly through canopy opening rod handle slip steel roa tube guide hole side fuselage Use little pressure wiggle tube too long may filed shorter minimum 2/s must extend 1/32 out side fuselage ticklish job will go patience may necessary file bevel end brass tube Once tube has entered side slide steel rod through both sides fuselage slide brass tube through other side C Bend 1/16 piano wire 2 pcs 900 7/8 long shown detail Clean inside brass tube acetone alcohol pushing small saturated piece tissue paper through hole Use soldering gun acid core solder unit Cut small pieces solder insert end tube trying get some acid Hold soldering gun end tube melt solder tin inside tube same other end Rough ends 1/16 wire fit brass tube tin solder D Clamp tape control rod hold control horn position slightly aft straight down point need helper pair pliers Center brass tube fuselage extend equally side fuselage Have helper hold fuselage steady hold end brass tube sliding Slip brass washer opposite end hold bent wire pliers end wire Heat tinned end holdingagainst end brass tube till solder melts wire begins slide Apply solder push wire tion parallel bottom wing boss Hold heat till sure solder has flowed inside tube Continue holding wire till solder changes color indicating solid E Release control rod capture side just soldered slip piece cardboard piece paper folded 5 6 thicknesses about 1/64 between washer fuselage tape place provide end play through fuselage Cut 3/16 X 3/8 spruce side rails length shown plan use alignment tools solder other flap wire place Slide rod through rear wing rod tube soldered side place spruce stick top flap wire extend under wing rod hold place two clothes pins small clamps Clamp very lightly crush spruce causing misalignment Again cap ture control rod before have helper hold fuselage flap wire just soldered will pushed through Clamp other wire spruce stick slip brass washer hold wire against tube holding ruce up under wing rod matching other soldering gun repeat pro other side 3 sloppy loose us iides slide hole slot return Assemble Fin 1 Drill hole top ruse control cable Hole may up -i 2 Try fin fit Spar should butt ens fuselage bottom hinge tab slide insiae 3 Insert long wing rod wing rod tube tape centered 4 Slip stab rod stab hinge hole sight wing rod level Use straight edge down side fm center compare seam fuselage 5 Remove flat file top fuselage fin contacts Coat contact area 5-minute epoxy repeat operation No4 Hold hand keep checking alignment till epoxy sets 6 Fillet fin fuselage epoxy 7 Epoxy stab control inside fuselage shown through rear fuselage Tail Cone Skid 1 Cut notch balsa block 9/16 deep fit over fin spar hinge Slip block place press hard against end fuse lage Pencil mark diameter fuselage end block Remove make circular cut 1/32 deep 1/8 front block Carve step end block slip inside fuselage cutting approximately 1/32 inside fuselage mark end block Re-coat fin spar epoxy coat contact areas block install 2 Carve block shape sand 3 Cut skid shape radius notch fit clear rudder pin Skid will off center File groove around end rudder pin help removal Epoxy skid place safety pin should used keep rudder pin coming out Rudder Control Cable 1 Cable may exited left right side depending servo travel Drill 5/32 hole centerline exit shown plan approximately centerline fuselage w top fuselage 2/s end fuselage 2 With small round file angle exit hole till cable housing will exit straight line towards rudder horn 3 Epoxy place end housing 2 m end fuselage other end running under flap actuator tube over ballast tubes Stab actuator cable follows same route Tow Hook 1 Position shown plane op timum performancesee flight instructions 2 Fabricated hook shown sufficient serious competition capture tow hook advised should actuated spoiler servo Ballast Tubes Optional Should Ys od thin wall aluminum ardware store oles location shown high bottom wing left side die match holes ide fuselage 1/32 clear slug weighs appr Jontinu ld after age 122 August 1979 69 glue inbor c Two Sizes % ID 10 PRICE 2 lengths Comes ig two STUT FAIRINGS 3 Lengths fairings iiir size 225 cockpit coammn~ -r y COMES IN 3 FT LENGTHS SMALL 118 OR LARGE 114 THIS HINGE COMPLETELY SEALS CONTROL SURFACE AIR LOSS STRONG FLEXIBLE HINGE THAT IS ABLE TO MOVE ooney gapless hinges --* drive shaft broken classical failure mode tubular member under excessive torsional stress After brief discussion decided pull off propeller make hand-launched Gossa mer Glider Two assistants ran along side handles Bryan flew back hangar Paul assessed situation resolved replace drive shaft aluminum did temporarily present version has GFRP drive shaft Much additional work has done complete set spare parts has built enough build entire second aircraft Bryan has continued physical training designed peak first break weather over English channel Plans suitable hangar near Dover have abandoned since team can set up now five minutes planned move England April Im looking forward big attempt think theyll make Adventures/Harrah continued page 61 gravity seems help projected wing stab area about 2000 sq loading about 10 ounces per square foot flying surface little high weak thermals will have hunt out some boomers long flights short engine runs lighter covering little sanding in-sight weight reduc tion would bring down between 7- 8-pound figure Great thermaling al A1 Packaged 2 Ft Size AND PRICE 5195Ipkg GAP LESS HINGE SLOTTER Makes Slots 4 Sizes Balsa %-Y-Ae /4 PRICE S195 FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 Phone 503 357 2732 though doesnt take away neat sport model 9 pounds no tricks mounting Proctor hardware spring mounted set cables maintain tension 2 4 pounds usually required type slow flying plane faster planes require overcome air pressure control surfaces about 6 pounds used one-spring method others use two two-spring method allows control surface deflection both directions case inadvertently moved reducing potential damage system Proctor fittings give finishing touch scale models very functional needed Naturally already guessed half Sig lumberyard went project availability straight-grained spruce large sheets 1/16 ply made building lot easier Jugs Titebond glue some Devcon Slow Cure epoxy Wilhold R/C56 glue wind shields used put together Williams Bros inverted U spear used guide tail wheel Du-Bro wheels Fox wheel fittings rounded out ground support Well Sunday morning perfect first flight engine started right up test glides range check engine running perfect Checked high low throttle nose held vertical could offer no excuse stay ground moment truth hand Ner vous Taxi fine increased rpm went left over-corrected rudder same time parted company ground surprised about 2/3 throttle airborne about 25 feet happened original design pop-off struts came back earth moment realized heading light standard No J4 sticking out Leroys head winding up picture missed itby inches Regaining some control myself plane put slow right turn left wing panel creasing its dihedral cut throttle off managed just clear trees could keep nose up headed slow right spin gave full left rudder full up elevator hoping pop wheels wheels did hit just before nose damage minor plane major pride Repairs now process snap-off struts being re placed working screw-mounted struts go back next flight time will spent ground taxiing did fly Taylorcraft things con sidered lot achieved learned K&B 61 experiments prop tests Proctor control systems surpassed ex pectations two failings both design other pilot error lucky have little repair learned found K&B engine Taylorcraft can wonderful sport-flying oombination Thanks Sterling Peanut version great old bird we-fly can magnificent horror over have go find Diana Cream Invader/Smith continued page 69 4 Slide tubes fuselage epoxy heavily after roughing od corner file glue areas 5 File end tubes flush side fuselage secure ballast strip plastic tape Radie Installatien 1 Installation shown Kraft radio other radio used essential same structural configuration used side rails cross rails Positions may altered suit radio 2 Shape side rails fit contour fuselage Use Hobbypoxy #2 gluing area Epoxy side rails place Fabricate lay out drill cross rails braces epoxy place 3 Loose-install servos align anchor front end cables control linkages Remove servos 4 Sand center seams fuselage smooth wet-or-dry sand entire fuselage re move orange peel effect gel coat Finishpaint fuselage sand canopy bottom needed obtain good fit cut out rear canopy clear control mechan ism Install hook canopy hooks servo rails Finish paint canopy 5 One Airtronics skid other suitable skid installed Install radio hook up linkages Assemble finished tail surfaces 122 Model Aviation Winning Ideas FOURMOST specialize WINNING Ideas AVIATION JEWELRY Largest Aircraft Jewelry Selection World CUSTOM JEWELRY SPECIALISTS Interested dealers full line airplane jewelry write PO Box 56CM JAddison Dallas Texas 75001 -Ph 214 596 3505 CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L051 Specialists brochure send 1 Sc stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 Slide glass wing rod tube marked CG suspend fuselage wing rod resting two blocks equal height table Lay 1 quarter 1 nickel 1 penny stab spar Add ballast nose tail necessary bring fuselage level Fill nose fuselage foam blocks anchor ballast Wing 1 Build right wing first Cover plan wax paper 2 Cut fit bottom 1/16 sheeting fit inboard plan exactly butt polyhedral joint flap joint Leave leading edge little short just line visible Pin down leading edge making sure stick exactly 3/16 Some sticks wider way other Use straightedge make sure stick pinned down straight 3 Pin down 3/16 X 1/4 sub spar using straightedge step 2 4 Ribs 1 through 13 too long Cut off back ends establish correct length assembly Drill ribs No 1 through 8 spoiler tube 5 Glue ribs #1 #12 place 6 Cut top bottom ar length cut angle polyhedral end shown both spars 7 Install bottom spar Hot Stuff end keep place 8 Ribs #2 through #11 cut two same spar cross sections differ rib out #6 rib Rib #2 has entire 3/ spar section removed Ribs #34 5 6 have ved back spar notch leave front section remaining ribs #7 through #11 have removed center spar notches Cut ribs keeping halves matched install leading edge D section ribs use ribs position spar rib notch Hot Stuff spar bottom sheeting 9 Cut spar vertical members match detail both wings Dry-install top bottom spar check wing rod tubes will fit necessary roll piece sandpaper line-sand holes tubes Tubes should slide holes freely may necessary trim front back vertical spar members slip between tubes Pin down through sheeting sure wing flat table 10 Trim rear sections ribs #2 #3 fit Hot Stuff place Remove vertical spar sections prepare enough Hobbypoxy #2 epoxy spars wingrod tubes Assemble vertical spar members tubes including rear brass tube 11 Trim install rear sections ribs #4 through #12 12 Install rubberhookand 1/16 X5/8X 1-15/16 plywood reinforcements 13 Install top spar #2 epoxy re-coat wing-rod tubes heavily along ribs #1 #2 joints Plug tube ends 14 Install 11 LE backup pieces 15 Drill diagonal ribs spoiler tube install 16 Layoutandcutnotchinribs#7#8 #9 #10 #11 3/16 X 3/16 balsa stick install stick flush top rib 17 Install spoiler tube attach bottom 3/16 stick notched block 3/16 balsa 18 Box spoiler bay 1/16 balsa sheet keep dirt out wing 19 Reinforce glue joints needed Titebond epoxy 20 Do sheet top time Flap 1 Cut two pieces 1/32 sheet balsa 2 wide 3/32 shorter inner wing panel both bottom sections flaps Cut two pieces 1/32 sheet balsa X 2-1/32 top sheeting 2 Notch corner bottom sheeting 1 wide X 15/16 long fit plywood inserts flap actuator slot 3 Pin down bottom sheet 4 Cut plywood inserts shown detail epoxy stack After set check slot will slip easily 1/16 rod Run drill through safety guide hole make loose slip fit guide pin Hot Stuff assembly place 5 Sand angle top flap spar match angle rib 6 Pin down flap spar being sure parallel wing sub spar Hot Stuff bottom sheeting 7 Cut 24 ribs per detail cutting strip 1/16 sheet balsa 30 wide Cut off pieces 1 3/4 long straightedge cut diagonally 8 Install ribs 9 Install top sheeting August 1979 123 new_ruleasos Bucker JUNGMEISTER radi nn*rni 020 rubb powerclukey 36 span 12 channel RIC tree flight S1495 3wingspan Seagullfor rubber available soon C02 power SEEYOURsend25Uor DEALER NOWcatalog FLYLINE MODELS INC 220317035732038 OS WANKEL ROTARY Hobby Barn Special $8999 SUPER TIGRE X-29 SPEED OFF Hobby Barn Special $3899 %P K&B61 RIC HB Special $5999 Hobby Barn PO Box 17856-M Tucson Arizona 85731 American Made ReadyTo Fly 1 High Quality 2 3 & 4 Channel RIC Models Are Really Ready Radio & Engine Choicel Shown example line CARDINAL Sport An excellent first aileron ship also flies well rudder Rud der-Elevator-Aileron Steerable nose wheel 3 4 channel 58 span 460 sq wing area 4 lb weight 20-22 oz wing loading average radio 25 35 eng 29 rec commended Balsa sheeted foam core wing wheel pants included installed SeeISSUE OT ~920 San ta Fe T rail complete FLfl wiju- story write address below complete info Lenexa KS 66215 913492-81331 SPOMODEL KITSANEV ERA RUSLICATION m. IAEROBATIC AIRPLANES /I8Y POST C MORRISON 45 PAGES SX II 52 PHOTOS / IS DETAILED DRAWINGS STRINGLESS WONDERON NITS 18only 5395 PLUS POSTAGE KIT $29579 CATALOG $100 KIT $3 95 GUIDE OF RUEBEE MODEL SUPPLIESCATALOGS 3100REPLATECH L INTERNATIONAL INC PPIPO BOX 2498-MA49800 MC KENZIE HWY Wec-yaesLA MESA CALIP 92041VIDA OREGON 97485 Outboard Wing 1 Cover plan wax paper 2 Butt inboard wing section out board section plan inboard section propped up near rib #4 indicated plan with2 block Align perfectly pin down Joint will built 3 Cut pin down 1/16 bottom sheet ing rib *13 rib #21 fit plan leaving leading edge line barely exposed 4 Cut pin down leading edge end use straightedge pin down between 5 Cut pruce bottom spar length lay placedo glue 6 Cutribsparnotchoutofribs #12 #13 allow spar splice install now 7 Glue ribs * 14 through #21 allow ing ribs position spar 8 Make four spar splices trimming 50 dihedral 9 Fit top spar epoxy splices place 10 Add short sub spar rib #13 rein forcement epoxy along rib #13 11 Cut add 1/16 balsa shear web both sides spar shown using scrap ends sheeting 12 Unpin trailing edge rib #19 #21 cut washout shims 3/16 balsa Slide rear shim under trailing edge wax paper Slide end shim under wax paper position under rib #21 13 Sheet top panel washout built 14 Wing tip added after leading edge shaped wing panel sanded 15 Build left wing point com pletion before sheeting inboard section using left wing reference Finishing Inboard Section 1 Again check good fill epoxy around wing rod tubes reinforcements Add epoxy needed 2 Sheet top carefully trim spoiler bay 3 Cut spoiler blade fit opening 4 Cut sand ribs spoiler bay become floor blade leaving blade above surface slightly allow sanding wing contour sand ribs let spoiler barely below surface wing Finishing Wing 1 Plane sand bottom leading edge sheeting shown end view wing full span 2 Radius leading edgemake gage keep radius uniform 3 Sand trailing edge top continue rib contour until trailing edge 1/16 thick 4 Wing tip instructions plan 5 Finish sand MonoKote wing 6 Install spoiler pull-string blades 7 Butt flap against wing align ends have clearance both ends Temporarily tape bottom scotch tape masking tape Fold flap down against under side wing lay mylar -wide tape over wing sub spar flap spar Raise flap neutral position tape along bottom joint removing temporary tape go Flying 1 Be sure CG correct 2 Check warps wing 3 Check controls work freely return neutral 4 Set stab rudder neutral 5 Make first hand-glide running attitude feel lift judge speed Throw straight level fairly hard get controls quickly get straight level fast can almost gnarantee trimmed perfectly 6 High-Start launchkeep up speed A Set full down trim stab 1 24 Model Aviation great schoolyard scale TRAVEL AIR 6OOO plus $200 postage 602-747-3633 B Obtain least 10 lbs pull highstart C Lower flaps ling edge D Throw hard nose up 300 450 get controls quickly correct turn too nose-high attitude Remember Invader flies faster sailpianes Keep speed up As launch progresses return stab trim neutral Begin hold slight up stab towards top launch until ready release Winch Launch Set stab rudder neutral Keep up speed B Lower flaps eload winch stand switch throw hard nose up 300 being careful lose balance Immediately start pulsing winch keep speed rela tively high until familiar launch/stall characteristics Dont try fantastic launches until get some practice first few flights used get familiar bird Fly straight level flaps launch position neutral stab trim feel out turns stalls Land flaps same position Flap Settings Launchdown trating trackingneutral Thermalingdown flap tight circle Let-down altitudefull flaps spoilers dive straight spiral 300 450 nose-down Landingwindy neutral Calm Trim LaunchHigh-start down Winch neutral Thermalingup required Penetratingslight down Landingneutral sailplane designed cover area Use way Dont park float unless known no lift around floating dynamic soaring order crank up trim determined experience fly gently few control movements possible thermaling keep turns flat possible again move controls needed nose tends drop tight turns requires up trim possibly some outside rudder Keep speed fairly high unless super lift up trim can help speed distance 8 oz 24 oz ballast required depending condi tions Eight oz ballast hardly affects sink rate sometimes used duration flights landing will skid landed flat however slight dork will nail spot throw dirt over top will stop Letters Editor continued page 5 fixtures floor lamps everything goes right can wind have Midwest winder mounted suction cup vise launch retrieve leaving chair old mans flying.. Wouldnt fun have contest winner contestant 1 minute flights during shindig everybody flys winds etc dont need timers need counters L F Randolph Dallas TX Sanity Pylon Sanity Racing nice article have concluded rules making procedure too democratic fellow Kilsdonk comes U/C speed completely undoes what lot us have doing pylon has com pletely different frame reference trying turn fun event specialist event won machine shop Unfortunately history AMA events net result shall use own WILLI rules continue have fun Frank B Baker Madison WI As know afamiliarprob tern No matter what ideals attach founding new eventbeginners fun etctechnical aspects attendant skill levels remorsely escalate nature competition note group clubs intends hang onto own special-event rules have effec tive attracting new pylon fliers Nor can blame Big John doing what comes naturally food thought.. Export Messerschmitt January issue Model Aviation free flight column page 61 published picture Bill Noonan Messerschmitt 20B stated plan published MA Although have subscription 1979 issues have yet received issue giving further details plan should glad could let know will available reason later year will holding rubber scale contest England probably Nationals would seem fine example such contest However time getting bit short way could let have copy plan quickly would grateful knowing much will cost cannot send money stage would gladly hearing what worth would mention am Editor SMAE NEWS Needless say think maga zine excellentit far superior anyAugust 1979 125 PRESENTING THE OCTURA F MOTOR MOUNT Almost quickly can say Swift Switch CHANGE FROM 60 TO 45 ENGINE OR VICE VERSA WITHOUT REMOVING THE ENTIRE MOUNT FROM HULL THE INSERT ON WHICH ENGINE IS MOUNTED! Featur d minimum parts Strong light extruded aluminum onepiece base onepiece insert 5 wide Interchanges Octura 556 5-60 Motor Mounts Ideally suited deep vee hulls Insert deep enough accomodate 65 engines Price $1550 per assembly md insert Additional inserts $550 sa Inserts sized drilled tapped popular marine engines $750 ea Order directly Only available local hobby dealer add 10% poatage Illinois residents add additional 5/ sales tao Send 5OZ catalOg OCTURA MODELS INC price list Celebrating 25th year 7351 N Hamlin Ave ie IL 60076 OCT I MODEL MARINE SUPPLIES SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1979/08
Page Numbers: 65, 66, 67, 68, 69, 122, 123, 124, 125
NO OCR TEXT THE Invader has flying four years now beginning much simpler sailplane same basic design MK IV has gone through four stages develop ment better performance structural strength until now what believe super competition sailplane will take Preceding page Beautiful young lady Herbs daughter Christine Martin beautiful sailplane azure skies snowcapped peaks Colorado Rockies delightful photo other pictures Maurice Kaiser punishment can give Its 1978 performance speaks itself have flown itto become 1978 Rocky Moun tain Soaring Association club champion attained rank Master Flyer 1st place 1978 LSF Regional Tournament 8th place FM USA Team Selection finals 1st place four RMSA AMA contests 1st place Pikes Peak RC contest several 2nd places has competition host formidable opponents RMSA including Skip Miller mention 40 best Pensacola initial concept came about through evaluation contest tasks both AMA FAI goal being design sail plane capable performing well tasks weather conditions boiled down five requirements must light-air floater must super strong must fast speed tasks must able penetrate wind have good L/D ratio distance thermal 66 Model Aviation Construction poly break before top sheeting has bean added Compare plan top view sea spar cross sections along plan top construction wing root before top sheeting ply pieces three glass tubee spar locked togetherrubber hook just aft Attop lathe basic frame ruddernote sturdy hinging arrangement mount small fin Below half all-flying stab servo rail arrangement shown detailed plan Rails spruce laminated ply cross pieces Servo positions throws given Convenient-to-use ballast tubes rest spruce cradle seen three circular openings just above two hookthis captured Fin ruggedly built tuselage plans OCtIl uaisa Talring blocks minimize disturbed air fin/stabilizer junction Rudder clevis shows FULL SIZE PLANS AVAILABLE. SEE PAGE 128 _-_ _I_ _ _ _ ___ _ _1_J88848~ jJ _ _ _K L4 INVADER MK N S 888888888 88888C838008T880888880888 OS 880888 888 888 8 8 888888 8A880C8808/8O8C7y8--- 8- 8NE8O8 88888B SO-IS88888 8083888888888808 88888888 51188 88888080888888 -8888888V888f} 848888888884 8 88 8 8888888 88888 L8888888888J ffl882c888 88 83V888888880~ INVADER MK& hunting ribs plus 1/16 sheeting entire wing altitude high-speed dives fear accomplished starting virtually bullet-proofflutter full flap spoilers can super clean airframe speed LID course beef adds weightbe brought down moderate dive low ratio Large flaps change airfoil camberwhich ends up 85 oz per sq ft wingspeed Getting down never problem full-flying stab change angle attackloading have found simply makes MK IV free flight must floating light air As strength thethe plane fly faster lets airfoil workbe flown time except super calm entire sailplane just strong Especi-at higher Reynolds number rate itair mainly because reacts slightest ally wing has super sparis still floaterdisturbance air still very stable diagonal ribbing addition conventional MK IV can brought down fromespecially very high speeds very August 1979 67 Spoiler wade snown enenaea Iross section aT spoiler detail plans shows actuation methodfitting under spoiler may seen picture wing panel joins fuselage Note generous flap left picture Combo flap flying tail broadens performance range respon Flowris very docile siinter mediate competition sa Try snap roll just give full ups hold let wh fun barrel mor Instructioni Fin Rudder Assemble spars hinge assembly 1 Rudder sparsi18 X 1/4 spruce 2 pieces Notch hinge tab tions spars contact c hinge tabs sandwiched between 2 Fin spars 2 spruce 2 pieces Same step 3 Dry-run-assemble fin spar rudder spar hinges 3/32 piano wire hinge pin place Clamp together Check hinge positions free movement satis fied epoxy 5 minutes slow dry spar hinge units being careful get epoxy hinge bearings Note Some hinge holes tighter others may necessitate making pin smaller chuck pm drill polish down using 400 320 wet dry paper Carve clearance opposite hinge bosses fin rudder spars 4 Assemble fin first Put wax paper plan Assemble inner frame first consists fin/spar hinge assembly bottom X ce piece 3/32 hole drilled position shown control cable housing accurately possible location hole 3 pieces alsa Epoxy unit together wipe excess off top sticks B Remove plan dry add thick balsa fillet front fin airfoil time C Trim top hinge tab clear stab hinge tube trying 1/32 plywood side brass tube through hole Trim sand top edges 1/32 plywood sides align top stab boss comparing plan brass tube through hole both side pieces alignment neutral position stab D Rough outer stab cable housing areas epoxy 4 spruce top housing exact and exact contour shown un balsa stick needed -dry-assemble two ass tube place against fin vi through vood su h 1 thinly dure extenos w two ways F wo stab boss leu stab hinge tube sure hole 5/16 sides boss Glue both parts ii being careful make top parallel ood G Sheet fin above stab 1/16 balsa Cut radius slot front stab rod brass tube 1 radius rear hinge hole Allow full el way After stab assembled check moves freely necessary widen radius slot H Airfoil leading edge fix fuselage time Will covered fuselage instructions Rudder 1 Cover plan wax paper 2 Make shims shown right ruddi 4 Pin down TE shims shown being sure 1/32 pad 1/16 inside rear plan shown 5 Cut TE stock top piece pin glue place Trim top piece after rudder removed plan 6 Cut remaining perimeter sticks pin place using proper shims glue Note 1/8 X 3/16 stick just above fin should fit around hinge boss epoxied along gusset 7 Cut fit glue diagonal rib sticks being sure use shims under end 8 Remove plan cut two pieces pruce control horn boss Notch inside slightly two pieces will andwich over hinge tab epoxy plan wax E stock4pcstofit s 1/32 base type Pin glue TE place ut pin glue LE tip pieces Use 1/32 shims under LE 3 Cut two pieces 1/8 X 3/16 balsa about 3 long Stack together mark hole locations too far end 1 center-to-center dimensions should accurate possible Holes should cen tered stick drilled square through sticks Mark top sticks keep inverting assembly still pinned together trim ends position holes correct distance end glue place time 4 Squeeze s tubes about pliersvery slightly File sand radius ends stab rods push through tube until will push through snugly Remember will two rods place assembly therefore twice hold ing power keep stab rods 5 Insert brass tubes drilled sticks squeezed ends outboard check alignment sure ends tubes flush sticks pin glue assembly place holes well centered sticks place 1/32 shim under outboard ends tubes sure tubes square plan parallel 6 Cut two 1/8 X 3/16 balsa sticks butt outboard ends tubes glue place Cut 4 pieces 1/8 X 3/16 balsa fit along 68 Model Aviation control horn position bottom rudder e line up control r e should ce n ton glue 11 Fi1 sande stick plan 3 Pin rudder spar hinge assembly place fiat plan establishes center line e plan Behind recelverand batterythe fourservos oompactiyarrangedagain check rail planform detail top L R rudder fiap servos bottom L R Stab spoilerltow hook servos tide o epoxy entire stress e 1/16 X 3/16 cross place flat plan rners - ut 1/16 spars piec shape desired cross sticks 1/16 sq balsa sanded sym Lrical airfoil 11 Radius LE finish-sand covering Fuselage 1 Drill file elongated slot left rear side wing boss permit entry spruce cross brace Insert spruce through slot until butts opposite side mark stick Remove cut notch 3/16 deep about 1/32 inside mark re-insert stick check length Trim fit until will bear against both sides Epoxy place after set cut off flush wing boss 2 Rough 3/32 X 2-9/16 brass tube corner file epoxy rear wing rod hole Install two fiberglass tubes epoxy prom inside Cutandfit X cecrossbraceat wing boss Keep high location r clear spoiler pull Epoxy assembly Use acid horn 3/32 X fl centerline neces t bolt tuuCs Sc prevent B Snap ends brass tube fuselage Use 1 guide through fuselage hole bly through canopy opening rod handle slip steel roa tube guide hole side fuselage Use little pressure wiggle tube too long may filed shorter minimum 2/s must extend 1/32 out side fuselage ticklish job will go patience may necessary file bevel end brass tube Once tube has entered side slide steel rod through both sides fuselage slide brass tube through other side C Bend 1/16 piano wire 2 pcs 900 7/8 long shown detail Clean inside brass tube acetone alcohol pushing small saturated piece tissue paper through hole Use soldering gun acid core solder unit Cut small pieces solder insert end tube trying get some acid Hold soldering gun end tube melt solder tin inside tube same other end Rough ends 1/16 wire fit brass tube tin solder D Clamp tape control rod hold control horn position slightly aft straight down point need helper pair pliers Center brass tube fuselage extend equally side fuselage Have helper hold fuselage steady hold end brass tube sliding Slip brass washer opposite end hold bent wire pliers end wire Heat tinned end holdingagainst end brass tube till solder melts wire begins slide Apply solder push wire tion parallel bottom wing boss Hold heat till sure solder has flowed inside tube Continue holding wire till solder changes color indicating solid E Release control rod capture side just soldered slip piece cardboard piece paper folded 5 6 thicknesses about 1/64 between washer fuselage tape place provide end play through fuselage Cut 3/16 X 3/8 spruce side rails length shown plan use alignment tools solder other flap wire place Slide rod through rear wing rod tube soldered side place spruce stick top flap wire extend under wing rod hold place two clothes pins small clamps Clamp very lightly crush spruce causing misalignment Again cap ture control rod before have helper hold fuselage flap wire just soldered will pushed through Clamp other wire spruce stick slip brass washer hold wire against tube holding ruce up under wing rod matching other soldering gun repeat pro other side 3 sloppy loose us iides slide hole slot return Assemble Fin 1 Drill hole top ruse control cable Hole may up -i 2 Try fin fit Spar should butt ens fuselage bottom hinge tab slide insiae 3 Insert long wing rod wing rod tube tape centered 4 Slip stab rod stab hinge hole sight wing rod level Use straight edge down side fm center compare seam fuselage 5 Remove flat file top fuselage fin contacts Coat contact area 5-minute epoxy repeat operation No4 Hold hand keep checking alignment till epoxy sets 6 Fillet fin fuselage epoxy 7 Epoxy stab control inside fuselage shown through rear fuselage Tail Cone Skid 1 Cut notch balsa block 9/16 deep fit over fin spar hinge Slip block place press hard against end fuse lage Pencil mark diameter fuselage end block Remove make circular cut 1/32 deep 1/8 front block Carve step end block slip inside fuselage cutting approximately 1/32 inside fuselage mark end block Re-coat fin spar epoxy coat contact areas block install 2 Carve block shape sand 3 Cut skid shape radius notch fit clear rudder pin Skid will off center File groove around end rudder pin help removal Epoxy skid place safety pin should used keep rudder pin coming out Rudder Control Cable 1 Cable may exited left right side depending servo travel Drill 5/32 hole centerline exit shown plan approximately centerline fuselage w top fuselage 2/s end fuselage 2 With small round file angle exit hole till cable housing will exit straight line towards rudder horn 3 Epoxy place end housing 2 m end fuselage other end running under flap actuator tube over ballast tubes Stab actuator cable follows same route Tow Hook 1 Position shown plane op timum performancesee flight instructions 2 Fabricated hook shown sufficient serious competition capture tow hook advised should actuated spoiler servo Ballast Tubes Optional Should Ys od thin wall aluminum ardware store oles location shown high bottom wing left side die match holes ide fuselage 1/32 clear slug weighs appr Jontinu ld after age 122 August 1979 69 glue inbor c Two Sizes % ID 10 PRICE 2 lengths Comes ig two STUT FAIRINGS 3 Lengths fairings iiir size 225 cockpit coammn~ -r y COMES IN 3 FT LENGTHS SMALL 118 OR LARGE 114 THIS HINGE COMPLETELY SEALS CONTROL SURFACE AIR LOSS STRONG FLEXIBLE HINGE THAT IS ABLE TO MOVE ooney gapless hinges --* drive shaft broken classical failure mode tubular member under excessive torsional stress After brief discussion decided pull off propeller make hand-launched Gossa mer Glider Two assistants ran along side handles Bryan flew back hangar Paul assessed situation resolved replace drive shaft aluminum did temporarily present version has GFRP drive shaft Much additional work has done complete set spare parts has built enough build entire second aircraft Bryan has continued physical training designed peak first break weather over English channel Plans suitable hangar near Dover have abandoned since team can set up now five minutes planned move England April Im looking forward big attempt think theyll make Adventures/Harrah continued page 61 gravity seems help projected wing stab area about 2000 sq loading about 10 ounces per square foot flying surface little high weak thermals will have hunt out some boomers long flights short engine runs lighter covering little sanding in-sight weight reduc tion would bring down between 7- 8-pound figure Great thermaling al A1 Packaged 2 Ft Size AND PRICE 5195Ipkg GAP LESS HINGE SLOTTER Makes Slots 4 Sizes Balsa %-Y-Ae /4 PRICE S195 FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 Phone 503 357 2732 though doesnt take away neat sport model 9 pounds no tricks mounting Proctor hardware spring mounted set cables maintain tension 2 4 pounds usually required type slow flying plane faster planes require overcome air pressure control surfaces about 6 pounds used one-spring method others use two two-spring method allows control surface deflection both directions case inadvertently moved reducing potential damage system Proctor fittings give finishing touch scale models very functional needed Naturally already guessed half Sig lumberyard went project availability straight-grained spruce large sheets 1/16 ply made building lot easier Jugs Titebond glue some Devcon Slow Cure epoxy Wilhold R/C56 glue wind shields used put together Williams Bros inverted U spear used guide tail wheel Du-Bro wheels Fox wheel fittings rounded out ground support Well Sunday morning perfect first flight engine started right up test glides range check engine running perfect Checked high low throttle nose held vertical could offer no excuse stay ground moment truth hand Ner vous Taxi fine increased rpm went left over-corrected rudder same time parted company ground surprised about 2/3 throttle airborne about 25 feet happened original design pop-off struts came back earth moment realized heading light standard No J4 sticking out Leroys head winding up picture missed itby inches Regaining some control myself plane put slow right turn left wing panel creasing its dihedral cut throttle off managed just clear trees could keep nose up headed slow right spin gave full left rudder full up elevator hoping pop wheels wheels did hit just before nose damage minor plane major pride Repairs now process snap-off struts being re placed working screw-mounted struts go back next flight time will spent ground taxiing did fly Taylorcraft things con sidered lot achieved learned K&B 61 experiments prop tests Proctor control systems surpassed ex pectations two failings both design other pilot error lucky have little repair learned found K&B engine Taylorcraft can wonderful sport-flying oombination Thanks Sterling Peanut version great old bird we-fly can magnificent horror over have go find Diana Cream Invader/Smith continued page 69 4 Slide tubes fuselage epoxy heavily after roughing od corner file glue areas 5 File end tubes flush side fuselage secure ballast strip plastic tape Radie Installatien 1 Installation shown Kraft radio other radio used essential same structural configuration used side rails cross rails Positions may altered suit radio 2 Shape side rails fit contour fuselage Use Hobbypoxy #2 gluing area Epoxy side rails place Fabricate lay out drill cross rails braces epoxy place 3 Loose-install servos align anchor front end cables control linkages Remove servos 4 Sand center seams fuselage smooth wet-or-dry sand entire fuselage re move orange peel effect gel coat Finishpaint fuselage sand canopy bottom needed obtain good fit cut out rear canopy clear control mechan ism Install hook canopy hooks servo rails Finish paint canopy 5 One Airtronics skid other suitable skid installed Install radio hook up linkages Assemble finished tail surfaces 122 Model Aviation Winning Ideas FOURMOST specialize WINNING Ideas AVIATION JEWELRY Largest Aircraft Jewelry Selection World CUSTOM JEWELRY SPECIALISTS Interested dealers full line airplane jewelry write PO Box 56CM JAddison Dallas Texas 75001 -Ph 214 596 3505 CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L051 Specialists brochure send 1 Sc stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 Slide glass wing rod tube marked CG suspend fuselage wing rod resting two blocks equal height table Lay 1 quarter 1 nickel 1 penny stab spar Add ballast nose tail necessary bring fuselage level Fill nose fuselage foam blocks anchor ballast Wing 1 Build right wing first Cover plan wax paper 2 Cut fit bottom 1/16 sheeting fit inboard plan exactly butt polyhedral joint flap joint Leave leading edge little short just line visible Pin down leading edge making sure stick exactly 3/16 Some sticks wider way other Use straightedge make sure stick pinned down straight 3 Pin down 3/16 X 1/4 sub spar using straightedge step 2 4 Ribs 1 through 13 too long Cut off back ends establish correct length assembly Drill ribs No 1 through 8 spoiler tube 5 Glue ribs #1 #12 place 6 Cut top bottom ar length cut angle polyhedral end shown both spars 7 Install bottom spar Hot Stuff end keep place 8 Ribs #2 through #11 cut two same spar cross sections differ rib out #6 rib Rib #2 has entire 3/ spar section removed Ribs #34 5 6 have ved back spar notch leave front section remaining ribs #7 through #11 have removed center spar notches Cut ribs keeping halves matched install leading edge D section ribs use ribs position spar rib notch Hot Stuff spar bottom sheeting 9 Cut spar vertical members match detail both wings Dry-install top bottom spar check wing rod tubes will fit necessary roll piece sandpaper line-sand holes tubes Tubes should slide holes freely may necessary trim front back vertical spar members slip between tubes Pin down through sheeting sure wing flat table 10 Trim rear sections ribs #2 #3 fit Hot Stuff place Remove vertical spar sections prepare enough Hobbypoxy #2 epoxy spars wingrod tubes Assemble vertical spar members tubes including rear brass tube 11 Trim install rear sections ribs #4 through #12 12 Install rubberhookand 1/16 X5/8X 1-15/16 plywood reinforcements 13 Install top spar #2 epoxy re-coat wing-rod tubes heavily along ribs #1 #2 joints Plug tube ends 14 Install 11 LE backup pieces 15 Drill diagonal ribs spoiler tube install 16 Layoutandcutnotchinribs#7#8 #9 #10 #11 3/16 X 3/16 balsa stick install stick flush top rib 17 Install spoiler tube attach bottom 3/16 stick notched block 3/16 balsa 18 Box spoiler bay 1/16 balsa sheet keep dirt out wing 19 Reinforce glue joints needed Titebond epoxy 20 Do sheet top time Flap 1 Cut two pieces 1/32 sheet balsa 2 wide 3/32 shorter inner wing panel both bottom sections flaps Cut two pieces 1/32 sheet balsa X 2-1/32 top sheeting 2 Notch corner bottom sheeting 1 wide X 15/16 long fit plywood inserts flap actuator slot 3 Pin down bottom sheet 4 Cut plywood inserts shown detail epoxy stack After set check slot will slip easily 1/16 rod Run drill through safety guide hole make loose slip fit guide pin Hot Stuff assembly place 5 Sand angle top flap spar match angle rib 6 Pin down flap spar being sure parallel wing sub spar Hot Stuff bottom sheeting 7 Cut 24 ribs per detail cutting strip 1/16 sheet balsa 30 wide Cut off pieces 1 3/4 long straightedge cut diagonally 8 Install ribs 9 Install top sheeting August 1979 123 new_ruleasos Bucker JUNGMEISTER radi nn*rni 020 rubb powerclukey 36 span 12 channel RIC tree flight S1495 3wingspan Seagullfor rubber available soon C02 power SEEYOURsend25Uor DEALER NOWcatalog FLYLINE MODELS INC 220317035732038 OS WANKEL ROTARY Hobby Barn Special $8999 SUPER TIGRE X-29 SPEED OFF Hobby Barn Special $3899 %P K&B61 RIC HB Special $5999 Hobby Barn PO Box 17856-M Tucson Arizona 85731 American Made ReadyTo Fly 1 High Quality 2 3 & 4 Channel RIC Models Are Really Ready Radio & Engine Choicel Shown example line CARDINAL Sport An excellent first aileron ship also flies well rudder Rud der-Elevator-Aileron Steerable nose wheel 3 4 channel 58 span 460 sq wing area 4 lb weight 20-22 oz wing loading average radio 25 35 eng 29 rec commended Balsa sheeted foam core wing wheel pants included installed SeeISSUE OT ~920 San ta Fe T rail complete FLfl wiju- story write address below complete info Lenexa KS 66215 913492-81331 SPOMODEL KITSANEV ERA RUSLICATION m. IAEROBATIC AIRPLANES /I8Y POST C MORRISON 45 PAGES SX II 52 PHOTOS / IS DETAILED DRAWINGS STRINGLESS WONDERON NITS 18only 5395 PLUS POSTAGE KIT $29579 CATALOG $100 KIT $3 95 GUIDE OF RUEBEE MODEL SUPPLIESCATALOGS 3100REPLATECH L INTERNATIONAL INC PPIPO BOX 2498-MA49800 MC KENZIE HWY Wec-yaesLA MESA CALIP 92041VIDA OREGON 97485 Outboard Wing 1 Cover plan wax paper 2 Butt inboard wing section out board section plan inboard section propped up near rib #4 indicated plan with2 block Align perfectly pin down Joint will built 3 Cut pin down 1/16 bottom sheet ing rib *13 rib #21 fit plan leaving leading edge line barely exposed 4 Cut pin down leading edge end use straightedge pin down between 5 Cut pruce bottom spar length lay placedo glue 6 Cutribsparnotchoutofribs #12 #13 allow spar splice install now 7 Glue ribs * 14 through #21 allow ing ribs position spar 8 Make four spar splices trimming 50 dihedral 9 Fit top spar epoxy splices place 10 Add short sub spar rib #13 rein forcement epoxy along rib #13 11 Cut add 1/16 balsa shear web both sides spar shown using scrap ends sheeting 12 Unpin trailing edge rib #19 #21 cut washout shims 3/16 balsa Slide rear shim under trailing edge wax paper Slide end shim under wax paper position under rib #21 13 Sheet top panel washout built 14 Wing tip added after leading edge shaped wing panel sanded 15 Build left wing point com pletion before sheeting inboard section using left wing reference Finishing Inboard Section 1 Again check good fill epoxy around wing rod tubes reinforcements Add epoxy needed 2 Sheet top carefully trim spoiler bay 3 Cut spoiler blade fit opening 4 Cut sand ribs spoiler bay become floor blade leaving blade above surface slightly allow sanding wing contour sand ribs let spoiler barely below surface wing Finishing Wing 1 Plane sand bottom leading edge sheeting shown end view wing full span 2 Radius leading edgemake gage keep radius uniform 3 Sand trailing edge top continue rib contour until trailing edge 1/16 thick 4 Wing tip instructions plan 5 Finish sand MonoKote wing 6 Install spoiler pull-string blades 7 Butt flap against wing align ends have clearance both ends Temporarily tape bottom scotch tape masking tape Fold flap down against under side wing lay mylar -wide tape over wing sub spar flap spar Raise flap neutral position tape along bottom joint removing temporary tape go Flying 1 Be sure CG correct 2 Check warps wing 3 Check controls work freely return neutral 4 Set stab rudder neutral 5 Make first hand-glide running attitude feel lift judge speed Throw straight level fairly hard get controls quickly get straight level fast can almost gnarantee trimmed perfectly 6 High-Start launchkeep up speed A Set full down trim stab 1 24 Model Aviation great schoolyard scale TRAVEL AIR 6OOO plus $200 postage 602-747-3633 B Obtain least 10 lbs pull highstart C Lower flaps ling edge D Throw hard nose up 300 450 get controls quickly correct turn too nose-high attitude Remember Invader flies faster sailpianes Keep speed up As launch progresses return stab trim neutral Begin hold slight up stab towards top launch until ready release Winch Launch Set stab rudder neutral Keep up speed B Lower flaps eload winch stand switch throw hard nose up 300 being careful lose balance Immediately start pulsing winch keep speed rela tively high until familiar launch/stall characteristics Dont try fantastic launches until get some practice first few flights used get familiar bird Fly straight level flaps launch position neutral stab trim feel out turns stalls Land flaps same position Flap Settings Launchdown trating trackingneutral Thermalingdown flap tight circle Let-down altitudefull flaps spoilers dive straight spiral 300 450 nose-down Landingwindy neutral Calm Trim LaunchHigh-start down Winch neutral Thermalingup required Penetratingslight down Landingneutral sailplane designed cover area Use way Dont park float unless known no lift around floating dynamic soaring order crank up trim determined experience fly gently few control movements possible thermaling keep turns flat possible again move controls needed nose tends drop tight turns requires up trim possibly some outside rudder Keep speed fairly high unless super lift up trim can help speed distance 8 oz 24 oz ballast required depending condi tions Eight oz ballast hardly affects sink rate sometimes used duration flights landing will skid landed flat however slight dork will nail spot throw dirt over top will stop Letters Editor continued page 5 fixtures floor lamps everything goes right can wind have Midwest winder mounted suction cup vise launch retrieve leaving chair old mans flying.. Wouldnt fun have contest winner contestant 1 minute flights during shindig everybody flys winds etc dont need timers need counters L F Randolph Dallas TX Sanity Pylon Sanity Racing nice article have concluded rules making procedure too democratic fellow Kilsdonk comes U/C speed completely undoes what lot us have doing pylon has com pletely different frame reference trying turn fun event specialist event won machine shop Unfortunately history AMA events net result shall use own WILLI rules continue have fun Frank B Baker Madison WI As know afamiliarprob tern No matter what ideals attach founding new eventbeginners fun etctechnical aspects attendant skill levels remorsely escalate nature competition note group clubs intends hang onto own special-event rules have effec tive attracting new pylon fliers Nor can blame Big John doing what comes naturally food thought.. Export Messerschmitt January issue Model Aviation free flight column page 61 published picture Bill Noonan Messerschmitt 20B stated plan published MA Although have subscription 1979 issues have yet received issue giving further details plan should glad could let know will available reason later year will holding rubber scale contest England probably Nationals would seem fine example such contest However time getting bit short way could let have copy plan quickly would grateful knowing much will cost cannot send money stage would gladly hearing what worth would mention am Editor SMAE NEWS Needless say think maga zine excellentit far superior anyAugust 1979 125 PRESENTING THE OCTURA F MOTOR MOUNT Almost quickly can say Swift Switch CHANGE FROM 60 TO 45 ENGINE OR VICE VERSA WITHOUT REMOVING THE ENTIRE MOUNT FROM HULL THE INSERT ON WHICH ENGINE IS MOUNTED! Featur d minimum parts Strong light extruded aluminum onepiece base onepiece insert 5 wide Interchanges Octura 556 5-60 Motor Mounts Ideally suited deep vee hulls Insert deep enough accomodate 65 engines Price $1550 per assembly md insert Additional inserts $550 sa Inserts sized drilled tapped popular marine engines $750 ea Order directly Only available local hobby dealer add 10% poatage Illinois residents add additional 5/ sales tao Send 5OZ catalOg OCTURA MODELS INC price list Celebrating 25th year 7351 N Hamlin Ave ie IL 60076 OCT I MODEL MARINE SUPPLIES SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1979/08
Page Numbers: 65, 66, 67, 68, 69, 122, 123, 124, 125
NO OCR TEXT THE Invader has flying four years now beginning much simpler sailplane same basic design MK IV has gone through four stages develop ment better performance structural strength until now what believe super competition sailplane will take Preceding page Beautiful young lady Herbs daughter Christine Martin beautiful sailplane azure skies snowcapped peaks Colorado Rockies delightful photo other pictures Maurice Kaiser punishment can give Its 1978 performance speaks itself have flown itto become 1978 Rocky Moun tain Soaring Association club champion attained rank Master Flyer 1st place 1978 LSF Regional Tournament 8th place FM USA Team Selection finals 1st place four RMSA AMA contests 1st place Pikes Peak RC contest several 2nd places has competition host formidable opponents RMSA including Skip Miller mention 40 best Pensacola initial concept came about through evaluation contest tasks both AMA FAI goal being design sail plane capable performing well tasks weather conditions boiled down five requirements must light-air floater must super strong must fast speed tasks must able penetrate wind have good L/D ratio distance thermal 66 Model Aviation Construction poly break before top sheeting has bean added Compare plan top view sea spar cross sections along plan top construction wing root before top sheeting ply pieces three glass tubee spar locked togetherrubber hook just aft Attop lathe basic frame ruddernote sturdy hinging arrangement mount small fin Below half all-flying stab servo rail arrangement shown detailed plan Rails spruce laminated ply cross pieces Servo positions throws given Convenient-to-use ballast tubes rest spruce cradle seen three circular openings just above two hookthis captured Fin ruggedly built tuselage plans OCtIl uaisa Talring blocks minimize disturbed air fin/stabilizer junction Rudder clevis shows FULL SIZE PLANS AVAILABLE. SEE PAGE 128 _-_ _I_ _ _ _ ___ _ _1_J88848~ jJ _ _ _K L4 INVADER MK N S 888888888 88888C838008T880888880888 OS 880888 888 888 8 8 888888 8A880C8808/8O8C7y8--- 8- 8NE8O8 88888B SO-IS88888 8083888888888808 88888888 51188 88888080888888 -8888888V888f} 848888888884 8 88 8 8888888 88888 L8888888888J ffl882c888 88 83V888888880~ INVADER MK& hunting ribs plus 1/16 sheeting entire wing altitude high-speed dives fear accomplished starting virtually bullet-proofflutter full flap spoilers can super clean airframe speed LID course beef adds weightbe brought down moderate dive low ratio Large flaps change airfoil camberwhich ends up 85 oz per sq ft wingspeed Getting down never problem full-flying stab change angle attackloading have found simply makes MK IV free flight must floating light air As strength thethe plane fly faster lets airfoil workbe flown time except super calm entire sailplane just strong Especi-at higher Reynolds number rate itair mainly because reacts slightest ally wing has super sparis still floaterdisturbance air still very stable diagonal ribbing addition conventional MK IV can brought down fromespecially very high speeds very August 1979 67 Spoiler wade snown enenaea Iross section aT spoiler detail plans shows actuation methodfitting under spoiler may seen picture wing panel joins fuselage Note generous flap left picture Combo flap flying tail broadens performance range respon Flowris very docile siinter mediate competition sa Try snap roll just give full ups hold let wh fun barrel mor Instructioni Fin Rudder Assemble spars hinge assembly 1 Rudder sparsi18 X 1/4 spruce 2 pieces Notch hinge tab tions spars contact c hinge tabs sandwiched between 2 Fin spars 2 spruce 2 pieces Same step 3 Dry-run-assemble fin spar rudder spar hinges 3/32 piano wire hinge pin place Clamp together Check hinge positions free movement satis fied epoxy 5 minutes slow dry spar hinge units being careful get epoxy hinge bearings Note Some hinge holes tighter others may necessitate making pin smaller chuck pm drill polish down using 400 320 wet dry paper Carve clearance opposite hinge bosses fin rudder spars 4 Assemble fin first Put wax paper plan Assemble inner frame first consists fin/spar hinge assembly bottom X ce piece 3/32 hole drilled position shown control cable housing accurately possible location hole 3 pieces alsa Epoxy unit together wipe excess off top sticks B Remove plan dry add thick balsa fillet front fin airfoil time C Trim top hinge tab clear stab hinge tube trying 1/32 plywood side brass tube through hole Trim sand top edges 1/32 plywood sides align top stab boss comparing plan brass tube through hole both side pieces alignment neutral position stab D Rough outer stab cable housing areas epoxy 4 spruce top housing exact and exact contour shown un balsa stick needed -dry-assemble two ass tube place against fin vi through vood su h 1 thinly dure extenos w two ways F wo stab boss leu stab hinge tube sure hole 5/16 sides boss Glue both parts ii being careful make top parallel ood G Sheet fin above stab 1/16 balsa Cut radius slot front stab rod brass tube 1 radius rear hinge hole Allow full el way After stab assembled check moves freely necessary widen radius slot H Airfoil leading edge fix fuselage time Will covered fuselage instructions Rudder 1 Cover plan wax paper 2 Make shims shown right ruddi 4 Pin down TE shims shown being sure 1/32 pad 1/16 inside rear plan shown 5 Cut TE stock top piece pin glue place Trim top piece after rudder removed plan 6 Cut remaining perimeter sticks pin place using proper shims glue Note 1/8 X 3/16 stick just above fin should fit around hinge boss epoxied along gusset 7 Cut fit glue diagonal rib sticks being sure use shims under end 8 Remove plan cut two pieces pruce control horn boss Notch inside slightly two pieces will andwich over hinge tab epoxy plan wax E stock4pcstofit s 1/32 base type Pin glue TE place ut pin glue LE tip pieces Use 1/32 shims under LE 3 Cut two pieces 1/8 X 3/16 balsa about 3 long Stack together mark hole locations too far end 1 center-to-center dimensions should accurate possible Holes should cen tered stick drilled square through sticks Mark top sticks keep inverting assembly still pinned together trim ends position holes correct distance end glue place time 4 Squeeze s tubes about pliersvery slightly File sand radius ends stab rods push through tube until will push through snugly Remember will two rods place assembly therefore twice hold ing power keep stab rods 5 Insert brass tubes drilled sticks squeezed ends outboard check alignment sure ends tubes flush sticks pin glue assembly place holes well centered sticks place 1/32 shim under outboard ends tubes sure tubes square plan parallel 6 Cut two 1/8 X 3/16 balsa sticks butt outboard ends tubes glue place Cut 4 pieces 1/8 X 3/16 balsa fit along 68 Model Aviation control horn position bottom rudder e line up control r e should ce n ton glue 11 Fi1 sande stick plan 3 Pin rudder spar hinge assembly place fiat plan establishes center line e plan Behind recelverand batterythe fourservos oompactiyarrangedagain check rail planform detail top L R rudder fiap servos bottom L R Stab spoilerltow hook servos tide o epoxy entire stress e 1/16 X 3/16 cross place flat plan rners - ut 1/16 spars piec shape desired cross sticks 1/16 sq balsa sanded sym Lrical airfoil 11 Radius LE finish-sand covering Fuselage 1 Drill file elongated slot left rear side wing boss permit entry spruce cross brace Insert spruce through slot until butts opposite side mark stick Remove cut notch 3/16 deep about 1/32 inside mark re-insert stick check length Trim fit until will bear against both sides Epoxy place after set cut off flush wing boss 2 Rough 3/32 X 2-9/16 brass tube corner file epoxy rear wing rod hole Install two fiberglass tubes epoxy prom inside Cutandfit X cecrossbraceat wing boss Keep high location r clear spoiler pull Epoxy assembly Use acid horn 3/32 X fl centerline neces t bolt tuuCs Sc prevent B Snap ends brass tube fuselage Use 1 guide through fuselage hole bly through canopy opening rod handle slip steel roa tube guide hole side fuselage Use little pressure wiggle tube too long may filed shorter minimum 2/s must extend 1/32 out side fuselage ticklish job will go patience may necessary file bevel end brass tube Once tube has entered side slide steel rod through both sides fuselage slide brass tube through other side C Bend 1/16 piano wire 2 pcs 900 7/8 long shown detail Clean inside brass tube acetone alcohol pushing small saturated piece tissue paper through hole Use soldering gun acid core solder unit Cut small pieces solder insert end tube trying get some acid Hold soldering gun end tube melt solder tin inside tube same other end Rough ends 1/16 wire fit brass tube tin solder D Clamp tape control rod hold control horn position slightly aft straight down point need helper pair pliers Center brass tube fuselage extend equally side fuselage Have helper hold fuselage steady hold end brass tube sliding Slip brass washer opposite end hold bent wire pliers end wire Heat tinned end holdingagainst end brass tube till solder melts wire begins slide Apply solder push wire tion parallel bottom wing boss Hold heat till sure solder has flowed inside tube Continue holding wire till solder changes color indicating solid E Release control rod capture side just soldered slip piece cardboard piece paper folded 5 6 thicknesses about 1/64 between washer fuselage tape place provide end play through fuselage Cut 3/16 X 3/8 spruce side rails length shown plan use alignment tools solder other flap wire place Slide rod through rear wing rod tube soldered side place spruce stick top flap wire extend under wing rod hold place two clothes pins small clamps Clamp very lightly crush spruce causing misalignment Again cap ture control rod before have helper hold fuselage flap wire just soldered will pushed through Clamp other wire spruce stick slip brass washer hold wire against tube holding ruce up under wing rod matching other soldering gun repeat pro other side 3 sloppy loose us iides slide hole slot return Assemble Fin 1 Drill hole top ruse control cable Hole may up -i 2 Try fin fit Spar should butt ens fuselage bottom hinge tab slide insiae 3 Insert long wing rod wing rod tube tape centered 4 Slip stab rod stab hinge hole sight wing rod level Use straight edge down side fm center compare seam fuselage 5 Remove flat file top fuselage fin contacts Coat contact area 5-minute epoxy repeat operation No4 Hold hand keep checking alignment till epoxy sets 6 Fillet fin fuselage epoxy 7 Epoxy stab control inside fuselage shown through rear fuselage Tail Cone Skid 1 Cut notch balsa block 9/16 deep fit over fin spar hinge Slip block place press hard against end fuse lage Pencil mark diameter fuselage end block Remove make circular cut 1/32 deep 1/8 front block Carve step end block slip inside fuselage cutting approximately 1/32 inside fuselage mark end block Re-coat fin spar epoxy coat contact areas block install 2 Carve block shape sand 3 Cut skid shape radius notch fit clear rudder pin Skid will off center File groove around end rudder pin help removal Epoxy skid place safety pin should used keep rudder pin coming out Rudder Control Cable 1 Cable may exited left right side depending servo travel Drill 5/32 hole centerline exit shown plan approximately centerline fuselage w top fuselage 2/s end fuselage 2 With small round file angle exit hole till cable housing will exit straight line towards rudder horn 3 Epoxy place end housing 2 m end fuselage other end running under flap actuator tube over ballast tubes Stab actuator cable follows same route Tow Hook 1 Position shown plane op timum performancesee flight instructions 2 Fabricated hook shown sufficient serious competition capture tow hook advised should actuated spoiler servo Ballast Tubes Optional Should Ys od thin wall aluminum ardware store oles location shown high bottom wing left side die match holes ide fuselage 1/32 clear slug weighs appr Jontinu ld after age 122 August 1979 69 glue inbor c Two Sizes % ID 10 PRICE 2 lengths Comes ig two STUT FAIRINGS 3 Lengths fairings iiir size 225 cockpit coammn~ -r y COMES IN 3 FT LENGTHS SMALL 118 OR LARGE 114 THIS HINGE COMPLETELY SEALS CONTROL SURFACE AIR LOSS STRONG FLEXIBLE HINGE THAT IS ABLE TO MOVE ooney gapless hinges --* drive shaft broken classical failure mode tubular member under excessive torsional stress After brief discussion decided pull off propeller make hand-launched Gossa mer Glider Two assistants ran along side handles Bryan flew back hangar Paul assessed situation resolved replace drive shaft aluminum did temporarily present version has GFRP drive shaft Much additional work has done complete set spare parts has built enough build entire second aircraft Bryan has continued physical training designed peak first break weather over English channel Plans suitable hangar near Dover have abandoned since team can set up now five minutes planned move England April Im looking forward big attempt think theyll make Adventures/Harrah continued page 61 gravity seems help projected wing stab area about 2000 sq loading about 10 ounces per square foot flying surface little high weak thermals will have hunt out some boomers long flights short engine runs lighter covering little sanding in-sight weight reduc tion would bring down between 7- 8-pound figure Great thermaling al A1 Packaged 2 Ft Size AND PRICE 5195Ipkg GAP LESS HINGE SLOTTER Makes Slots 4 Sizes Balsa %-Y-Ae /4 PRICE S195 FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 Phone 503 357 2732 though doesnt take away neat sport model 9 pounds no tricks mounting Proctor hardware spring mounted set cables maintain tension 2 4 pounds usually required type slow flying plane faster planes require overcome air pressure control surfaces about 6 pounds used one-spring method others use two two-spring method allows control surface deflection both directions case inadvertently moved reducing potential damage system Proctor fittings give finishing touch scale models very functional needed Naturally already guessed half Sig lumberyard went project availability straight-grained spruce large sheets 1/16 ply made building lot easier Jugs Titebond glue some Devcon Slow Cure epoxy Wilhold R/C56 glue wind shields used put together Williams Bros inverted U spear used guide tail wheel Du-Bro wheels Fox wheel fittings rounded out ground support Well Sunday morning perfect first flight engine started right up test glides range check engine running perfect Checked high low throttle nose held vertical could offer no excuse stay ground moment truth hand Ner vous Taxi fine increased rpm went left over-corrected rudder same time parted company ground surprised about 2/3 throttle airborne about 25 feet happened original design pop-off struts came back earth moment realized heading light standard No J4 sticking out Leroys head winding up picture missed itby inches Regaining some control myself plane put slow right turn left wing panel creasing its dihedral cut throttle off managed just clear trees could keep nose up headed slow right spin gave full left rudder full up elevator hoping pop wheels wheels did hit just before nose damage minor plane major pride Repairs now process snap-off struts being re placed working screw-mounted struts go back next flight time will spent ground taxiing did fly Taylorcraft things con sidered lot achieved learned K&B 61 experiments prop tests Proctor control systems surpassed ex pectations two failings both design other pilot error lucky have little repair learned found K&B engine Taylorcraft can wonderful sport-flying oombination Thanks Sterling Peanut version great old bird we-fly can magnificent horror over have go find Diana Cream Invader/Smith continued page 69 4 Slide tubes fuselage epoxy heavily after roughing od corner file glue areas 5 File end tubes flush side fuselage secure ballast strip plastic tape Radie Installatien 1 Installation shown Kraft radio other radio used essential same structural configuration used side rails cross rails Positions may altered suit radio 2 Shape side rails fit contour fuselage Use Hobbypoxy #2 gluing area Epoxy side rails place Fabricate lay out drill cross rails braces epoxy place 3 Loose-install servos align anchor front end cables control linkages Remove servos 4 Sand center seams fuselage smooth wet-or-dry sand entire fuselage re move orange peel effect gel coat Finishpaint fuselage sand canopy bottom needed obtain good fit cut out rear canopy clear control mechan ism Install hook canopy hooks servo rails Finish paint canopy 5 One Airtronics skid other suitable skid installed Install radio hook up linkages Assemble finished tail surfaces 122 Model Aviation Winning Ideas FOURMOST specialize WINNING Ideas AVIATION JEWELRY Largest Aircraft Jewelry Selection World CUSTOM JEWELRY SPECIALISTS Interested dealers full line airplane jewelry write PO Box 56CM JAddison Dallas Texas 75001 -Ph 214 596 3505 CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L051 Specialists brochure send 1 Sc stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 Slide glass wing rod tube marked CG suspend fuselage wing rod resting two blocks equal height table Lay 1 quarter 1 nickel 1 penny stab spar Add ballast nose tail necessary bring fuselage level Fill nose fuselage foam blocks anchor ballast Wing 1 Build right wing first Cover plan wax paper 2 Cut fit bottom 1/16 sheeting fit inboard plan exactly butt polyhedral joint flap joint Leave leading edge little short just line visible Pin down leading edge making sure stick exactly 3/16 Some sticks wider way other Use straightedge make sure stick pinned down straight 3 Pin down 3/16 X 1/4 sub spar using straightedge step 2 4 Ribs 1 through 13 too long Cut off back ends establish correct length assembly Drill ribs No 1 through 8 spoiler tube 5 Glue ribs #1 #12 place 6 Cut top bottom ar length cut angle polyhedral end shown both spars 7 Install bottom spar Hot Stuff end keep place 8 Ribs #2 through #11 cut two same spar cross sections differ rib out #6 rib Rib #2 has entire 3/ spar section removed Ribs #34 5 6 have ved back spar notch leave front section remaining ribs #7 through #11 have removed center spar notches Cut ribs keeping halves matched install leading edge D section ribs use ribs position spar rib notch Hot Stuff spar bottom sheeting 9 Cut spar vertical members match detail both wings Dry-install top bottom spar check wing rod tubes will fit necessary roll piece sandpaper line-sand holes tubes Tubes should slide holes freely may necessary trim front back vertical spar members slip between tubes Pin down through sheeting sure wing flat table 10 Trim rear sections ribs #2 #3 fit Hot Stuff place Remove vertical spar sections prepare enough Hobbypoxy #2 epoxy spars wingrod tubes Assemble vertical spar members tubes including rear brass tube 11 Trim install rear sections ribs #4 through #12 12 Install rubberhookand 1/16 X5/8X 1-15/16 plywood reinforcements 13 Install top spar #2 epoxy re-coat wing-rod tubes heavily along ribs #1 #2 joints Plug tube ends 14 Install 11 LE backup pieces 15 Drill diagonal ribs spoiler tube install 16 Layoutandcutnotchinribs#7#8 #9 #10 #11 3/16 X 3/16 balsa stick install stick flush top rib 17 Install spoiler tube attach bottom 3/16 stick notched block 3/16 balsa 18 Box spoiler bay 1/16 balsa sheet keep dirt out wing 19 Reinforce glue joints needed Titebond epoxy 20 Do sheet top time Flap 1 Cut two pieces 1/32 sheet balsa 2 wide 3/32 shorter inner wing panel both bottom sections flaps Cut two pieces 1/32 sheet balsa X 2-1/32 top sheeting 2 Notch corner bottom sheeting 1 wide X 15/16 long fit plywood inserts flap actuator slot 3 Pin down bottom sheet 4 Cut plywood inserts shown detail epoxy stack After set check slot will slip easily 1/16 rod Run drill through safety guide hole make loose slip fit guide pin Hot Stuff assembly place 5 Sand angle top flap spar match angle rib 6 Pin down flap spar being sure parallel wing sub spar Hot Stuff bottom sheeting 7 Cut 24 ribs per detail cutting strip 1/16 sheet balsa 30 wide Cut off pieces 1 3/4 long straightedge cut diagonally 8 Install ribs 9 Install top sheeting August 1979 123 new_ruleasos Bucker JUNGMEISTER radi nn*rni 020 rubb powerclukey 36 span 12 channel RIC tree flight S1495 3wingspan Seagullfor rubber available soon C02 power SEEYOURsend25Uor DEALER NOWcatalog FLYLINE MODELS INC 220317035732038 OS WANKEL ROTARY Hobby Barn Special $8999 SUPER TIGRE X-29 SPEED OFF Hobby Barn Special $3899 %P K&B61 RIC HB Special $5999 Hobby Barn PO Box 17856-M Tucson Arizona 85731 American Made ReadyTo Fly 1 High Quality 2 3 & 4 Channel RIC Models Are Really Ready Radio & Engine Choicel Shown example line CARDINAL Sport An excellent first aileron ship also flies well rudder Rud der-Elevator-Aileron Steerable nose wheel 3 4 channel 58 span 460 sq wing area 4 lb weight 20-22 oz wing loading average radio 25 35 eng 29 rec commended Balsa sheeted foam core wing wheel pants included installed SeeISSUE OT ~920 San ta Fe T rail complete FLfl wiju- story write address below complete info Lenexa KS 66215 913492-81331 SPOMODEL KITSANEV ERA RUSLICATION m. IAEROBATIC AIRPLANES /I8Y POST C MORRISON 45 PAGES SX II 52 PHOTOS / IS DETAILED DRAWINGS STRINGLESS WONDERON NITS 18only 5395 PLUS POSTAGE KIT $29579 CATALOG $100 KIT $3 95 GUIDE OF RUEBEE MODEL SUPPLIESCATALOGS 3100REPLATECH L INTERNATIONAL INC PPIPO BOX 2498-MA49800 MC KENZIE HWY Wec-yaesLA MESA CALIP 92041VIDA OREGON 97485 Outboard Wing 1 Cover plan wax paper 2 Butt inboard wing section out board section plan inboard section propped up near rib #4 indicated plan with2 block Align perfectly pin down Joint will built 3 Cut pin down 1/16 bottom sheet ing rib *13 rib #21 fit plan leaving leading edge line barely exposed 4 Cut pin down leading edge end use straightedge pin down between 5 Cut pruce bottom spar length lay placedo glue 6 Cutribsparnotchoutofribs #12 #13 allow spar splice install now 7 Glue ribs * 14 through #21 allow ing ribs position spar 8 Make four spar splices trimming 50 dihedral 9 Fit top spar epoxy splices place 10 Add short sub spar rib #13 rein forcement epoxy along rib #13 11 Cut add 1/16 balsa shear web both sides spar shown using scrap ends sheeting 12 Unpin trailing edge rib #19 #21 cut washout shims 3/16 balsa Slide rear shim under trailing edge wax paper Slide end shim under wax paper position under rib #21 13 Sheet top panel washout built 14 Wing tip added after leading edge shaped wing panel sanded 15 Build left wing point com pletion before sheeting inboard section using left wing reference Finishing Inboard Section 1 Again check good fill epoxy around wing rod tubes reinforcements Add epoxy needed 2 Sheet top carefully trim spoiler bay 3 Cut spoiler blade fit opening 4 Cut sand ribs spoiler bay become floor blade leaving blade above surface slightly allow sanding wing contour sand ribs let spoiler barely below surface wing Finishing Wing 1 Plane sand bottom leading edge sheeting shown end view wing full span 2 Radius leading edgemake gage keep radius uniform 3 Sand trailing edge top continue rib contour until trailing edge 1/16 thick 4 Wing tip instructions plan 5 Finish sand MonoKote wing 6 Install spoiler pull-string blades 7 Butt flap against wing align ends have clearance both ends Temporarily tape bottom scotch tape masking tape Fold flap down against under side wing lay mylar -wide tape over wing sub spar flap spar Raise flap neutral position tape along bottom joint removing temporary tape go Flying 1 Be sure CG correct 2 Check warps wing 3 Check controls work freely return neutral 4 Set stab rudder neutral 5 Make first hand-glide running attitude feel lift judge speed Throw straight level fairly hard get controls quickly get straight level fast can almost gnarantee trimmed perfectly 6 High-Start launchkeep up speed A Set full down trim stab 1 24 Model Aviation great schoolyard scale TRAVEL AIR 6OOO plus $200 postage 602-747-3633 B Obtain least 10 lbs pull highstart C Lower flaps ling edge D Throw hard nose up 300 450 get controls quickly correct turn too nose-high attitude Remember Invader flies faster sailpianes Keep speed up As launch progresses return stab trim neutral Begin hold slight up stab towards top launch until ready release Winch Launch Set stab rudder neutral Keep up speed B Lower flaps eload winch stand switch throw hard nose up 300 being careful lose balance Immediately start pulsing winch keep speed rela tively high until familiar launch/stall characteristics Dont try fantastic launches until get some practice first few flights used get familiar bird Fly straight level flaps launch position neutral stab trim feel out turns stalls Land flaps same position Flap Settings Launchdown trating trackingneutral Thermalingdown flap tight circle Let-down altitudefull flaps spoilers dive straight spiral 300 450 nose-down Landingwindy neutral Calm Trim LaunchHigh-start down Winch neutral Thermalingup required Penetratingslight down Landingneutral sailplane designed cover area Use way Dont park float unless known no lift around floating dynamic soaring order crank up trim determined experience fly gently few control movements possible thermaling keep turns flat possible again move controls needed nose tends drop tight turns requires up trim possibly some outside rudder Keep speed fairly high unless super lift up trim can help speed distance 8 oz 24 oz ballast required depending condi tions Eight oz ballast hardly affects sink rate sometimes used duration flights landing will skid landed flat however slight dork will nail spot throw dirt over top will stop Letters Editor continued page 5 fixtures floor lamps everything goes right can wind have Midwest winder mounted suction cup vise launch retrieve leaving chair old mans flying.. Wouldnt fun have contest winner contestant 1 minute flights during shindig everybody flys winds etc dont need timers need counters L F Randolph Dallas TX Sanity Pylon Sanity Racing nice article have concluded rules making procedure too democratic fellow Kilsdonk comes U/C speed completely undoes what lot us have doing pylon has com pletely different frame reference trying turn fun event specialist event won machine shop Unfortunately history AMA events net result shall use own WILLI rules continue have fun Frank B Baker Madison WI As know afamiliarprob tern No matter what ideals attach founding new eventbeginners fun etctechnical aspects attendant skill levels remorsely escalate nature competition note group clubs intends hang onto own special-event rules have effec tive attracting new pylon fliers Nor can blame Big John doing what comes naturally food thought.. Export Messerschmitt January issue Model Aviation free flight column page 61 published picture Bill Noonan Messerschmitt 20B stated plan published MA Although have subscription 1979 issues have yet received issue giving further details plan should glad could let know will available reason later year will holding rubber scale contest England probably Nationals would seem fine example such contest However time getting bit short way could let have copy plan quickly would grateful knowing much will cost cannot send money stage would gladly hearing what worth would mention am Editor SMAE NEWS Needless say think maga zine excellentit far superior anyAugust 1979 125 PRESENTING THE OCTURA F MOTOR MOUNT Almost quickly can say Swift Switch CHANGE FROM 60 TO 45 ENGINE OR VICE VERSA WITHOUT REMOVING THE ENTIRE MOUNT FROM HULL THE INSERT ON WHICH ENGINE IS MOUNTED! Featur d minimum parts Strong light extruded aluminum onepiece base onepiece insert 5 wide Interchanges Octura 556 5-60 Motor Mounts Ideally suited deep vee hulls Insert deep enough accomodate 65 engines Price $1550 per assembly md insert Additional inserts $550 sa Inserts sized drilled tapped popular marine engines $750 ea Order directly Only available local hobby dealer add 10% poatage Illinois residents add additional 5/ sales tao Send 5OZ catalOg OCTURA MODELS INC price list Celebrating 25th year 7351 N Hamlin Ave ie IL 60076 OCT I MODEL MARINE SUPPLIES SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1979/08
Page Numbers: 65, 66, 67, 68, 69, 122, 123, 124, 125
NO OCR TEXT THE Invader has flying four years now beginning much simpler sailplane same basic design MK IV has gone through four stages develop ment better performance structural strength until now what believe super competition sailplane will take Preceding page Beautiful young lady Herbs daughter Christine Martin beautiful sailplane azure skies snowcapped peaks Colorado Rockies delightful photo other pictures Maurice Kaiser punishment can give Its 1978 performance speaks itself have flown itto become 1978 Rocky Moun tain Soaring Association club champion attained rank Master Flyer 1st place 1978 LSF Regional Tournament 8th place FM USA Team Selection finals 1st place four RMSA AMA contests 1st place Pikes Peak RC contest several 2nd places has competition host formidable opponents RMSA including Skip Miller mention 40 best Pensacola initial concept came about through evaluation contest tasks both AMA FAI goal being design sail plane capable performing well tasks weather conditions boiled down five requirements must light-air floater must super strong must fast speed tasks must able penetrate wind have good L/D ratio distance thermal 66 Model Aviation Construction poly break before top sheeting has bean added Compare plan top view sea spar cross sections along plan top construction wing root before top sheeting ply pieces three glass tubee spar locked togetherrubber hook just aft Attop lathe basic frame ruddernote sturdy hinging arrangement mount small fin Below half all-flying stab servo rail arrangement shown detailed plan Rails spruce laminated ply cross pieces Servo positions throws given Convenient-to-use ballast tubes rest spruce cradle seen three circular openings just above two hookthis captured Fin ruggedly built tuselage plans OCtIl uaisa Talring blocks minimize disturbed air fin/stabilizer junction Rudder clevis shows FULL SIZE PLANS AVAILABLE. SEE PAGE 128 _-_ _I_ _ _ _ ___ _ _1_J88848~ jJ _ _ _K L4 INVADER MK N S 888888888 88888C838008T880888880888 OS 880888 888 888 8 8 888888 8A880C8808/8O8C7y8--- 8- 8NE8O8 88888B SO-IS88888 8083888888888808 88888888 51188 88888080888888 -8888888V888f} 848888888884 8 88 8 8888888 88888 L8888888888J ffl882c888 88 83V888888880~ INVADER MK& hunting ribs plus 1/16 sheeting entire wing altitude high-speed dives fear accomplished starting virtually bullet-proofflutter full flap spoilers can super clean airframe speed LID course beef adds weightbe brought down moderate dive low ratio Large flaps change airfoil camberwhich ends up 85 oz per sq ft wingspeed Getting down never problem full-flying stab change angle attackloading have found simply makes MK IV free flight must floating light air As strength thethe plane fly faster lets airfoil workbe flown time except super calm entire sailplane just strong Especi-at higher Reynolds number rate itair mainly because reacts slightest ally wing has super sparis still floaterdisturbance air still very stable diagonal ribbing addition conventional MK IV can brought down fromespecially very high speeds very August 1979 67 Spoiler wade snown enenaea Iross section aT spoiler detail plans shows actuation methodfitting under spoiler may seen picture wing panel joins fuselage Note generous flap left picture Combo flap flying tail broadens performance range respon Flowris very docile siinter mediate competition sa Try snap roll just give full ups hold let wh fun barrel mor Instructioni Fin Rudder Assemble spars hinge assembly 1 Rudder sparsi18 X 1/4 spruce 2 pieces Notch hinge tab tions spars contact c hinge tabs sandwiched between 2 Fin spars 2 spruce 2 pieces Same step 3 Dry-run-assemble fin spar rudder spar hinges 3/32 piano wire hinge pin place Clamp together Check hinge positions free movement satis fied epoxy 5 minutes slow dry spar hinge units being careful get epoxy hinge bearings Note Some hinge holes tighter others may necessitate making pin smaller chuck pm drill polish down using 400 320 wet dry paper Carve clearance opposite hinge bosses fin rudder spars 4 Assemble fin first Put wax paper plan Assemble inner frame first consists fin/spar hinge assembly bottom X ce piece 3/32 hole drilled position shown control cable housing accurately possible location hole 3 pieces alsa Epoxy unit together wipe excess off top sticks B Remove plan dry add thick balsa fillet front fin airfoil time C Trim top hinge tab clear stab hinge tube trying 1/32 plywood side brass tube through hole Trim sand top edges 1/32 plywood sides align top stab boss comparing plan brass tube through hole both side pieces alignment neutral position stab D Rough outer stab cable housing areas epoxy 4 spruce top housing exact and exact contour shown un balsa stick needed -dry-assemble two ass tube place against fin vi through vood su h 1 thinly dure extenos w two ways F wo stab boss leu stab hinge tube sure hole 5/16 sides boss Glue both parts ii being careful make top parallel ood G Sheet fin above stab 1/16 balsa Cut radius slot front stab rod brass tube 1 radius rear hinge hole Allow full el way After stab assembled check moves freely necessary widen radius slot H Airfoil leading edge fix fuselage time Will covered fuselage instructions Rudder 1 Cover plan wax paper 2 Make shims shown right ruddi 4 Pin down TE shims shown being sure 1/32 pad 1/16 inside rear plan shown 5 Cut TE stock top piece pin glue place Trim top piece after rudder removed plan 6 Cut remaining perimeter sticks pin place using proper shims glue Note 1/8 X 3/16 stick just above fin should fit around hinge boss epoxied along gusset 7 Cut fit glue diagonal rib sticks being sure use shims under end 8 Remove plan cut two pieces pruce control horn boss Notch inside slightly two pieces will andwich over hinge tab epoxy plan wax E stock4pcstofit s 1/32 base type Pin glue TE place ut pin glue LE tip pieces Use 1/32 shims under LE 3 Cut two pieces 1/8 X 3/16 balsa about 3 long Stack together mark hole locations too far end 1 center-to-center dimensions should accurate possible Holes should cen tered stick drilled square through sticks Mark top sticks keep inverting assembly still pinned together trim ends position holes correct distance end glue place time 4 Squeeze s tubes about pliersvery slightly File sand radius ends stab rods push through tube until will push through snugly Remember will two rods place assembly therefore twice hold ing power keep stab rods 5 Insert brass tubes drilled sticks squeezed ends outboard check alignment sure ends tubes flush sticks pin glue assembly place holes well centered sticks place 1/32 shim under outboard ends tubes sure tubes square plan parallel 6 Cut two 1/8 X 3/16 balsa sticks butt outboard ends tubes glue place Cut 4 pieces 1/8 X 3/16 balsa fit along 68 Model Aviation control horn position bottom rudder e line up control r e should ce n ton glue 11 Fi1 sande stick plan 3 Pin rudder spar hinge assembly place fiat plan establishes center line e plan Behind recelverand batterythe fourservos oompactiyarrangedagain check rail planform detail top L R rudder fiap servos bottom L R Stab spoilerltow hook servos tide o epoxy entire stress e 1/16 X 3/16 cross place flat plan rners - ut 1/16 spars piec shape desired cross sticks 1/16 sq balsa sanded sym Lrical airfoil 11 Radius LE finish-sand covering Fuselage 1 Drill file elongated slot left rear side wing boss permit entry spruce cross brace Insert spruce through slot until butts opposite side mark stick Remove cut notch 3/16 deep about 1/32 inside mark re-insert stick check length Trim fit until will bear against both sides Epoxy place after set cut off flush wing boss 2 Rough 3/32 X 2-9/16 brass tube corner file epoxy rear wing rod hole Install two fiberglass tubes epoxy prom inside Cutandfit X cecrossbraceat wing boss Keep high location r clear spoiler pull Epoxy assembly Use acid horn 3/32 X fl centerline neces t bolt tuuCs Sc prevent B Snap ends brass tube fuselage Use 1 guide through fuselage hole bly through canopy opening rod handle slip steel roa tube guide hole side fuselage Use little pressure wiggle tube too long may filed shorter minimum 2/s must extend 1/32 out side fuselage ticklish job will go patience may necessary file bevel end brass tube Once tube has entered side slide steel rod through both sides fuselage slide brass tube through other side C Bend 1/16 piano wire 2 pcs 900 7/8 long shown detail Clean inside brass tube acetone alcohol pushing small saturated piece tissue paper through hole Use soldering gun acid core solder unit Cut small pieces solder insert end tube trying get some acid Hold soldering gun end tube melt solder tin inside tube same other end Rough ends 1/16 wire fit brass tube tin solder D Clamp tape control rod hold control horn position slightly aft straight down point need helper pair pliers Center brass tube fuselage extend equally side fuselage Have helper hold fuselage steady hold end brass tube sliding Slip brass washer opposite end hold bent wire pliers end wire Heat tinned end holdingagainst end brass tube till solder melts wire begins slide Apply solder push wire tion parallel bottom wing boss Hold heat till sure solder has flowed inside tube Continue holding wire till solder changes color indicating solid E Release control rod capture side just soldered slip piece cardboard piece paper folded 5 6 thicknesses about 1/64 between washer fuselage tape place provide end play through fuselage Cut 3/16 X 3/8 spruce side rails length shown plan use alignment tools solder other flap wire place Slide rod through rear wing rod tube soldered side place spruce stick top flap wire extend under wing rod hold place two clothes pins small clamps Clamp very lightly crush spruce causing misalignment Again cap ture control rod before have helper hold fuselage flap wire just soldered will pushed through Clamp other wire spruce stick slip brass washer hold wire against tube holding ruce up under wing rod matching other soldering gun repeat pro other side 3 sloppy loose us iides slide hole slot return Assemble Fin 1 Drill hole top ruse control cable Hole may up -i 2 Try fin fit Spar should butt ens fuselage bottom hinge tab slide insiae 3 Insert long wing rod wing rod tube tape centered 4 Slip stab rod stab hinge hole sight wing rod level Use straight edge down side fm center compare seam fuselage 5 Remove flat file top fuselage fin contacts Coat contact area 5-minute epoxy repeat operation No4 Hold hand keep checking alignment till epoxy sets 6 Fillet fin fuselage epoxy 7 Epoxy stab control inside fuselage shown through rear fuselage Tail Cone Skid 1 Cut notch balsa block 9/16 deep fit over fin spar hinge Slip block place press hard against end fuse lage Pencil mark diameter fuselage end block Remove make circular cut 1/32 deep 1/8 front block Carve step end block slip inside fuselage cutting approximately 1/32 inside fuselage mark end block Re-coat fin spar epoxy coat contact areas block install 2 Carve block shape sand 3 Cut skid shape radius notch fit clear rudder pin Skid will off center File groove around end rudder pin help removal Epoxy skid place safety pin should used keep rudder pin coming out Rudder Control Cable 1 Cable may exited left right side depending servo travel Drill 5/32 hole centerline exit shown plan approximately centerline fuselage w top fuselage 2/s end fuselage 2 With small round file angle exit hole till cable housing will exit straight line towards rudder horn 3 Epoxy place end housing 2 m end fuselage other end running under flap actuator tube over ballast tubes Stab actuator cable follows same route Tow Hook 1 Position shown plane op timum performancesee flight instructions 2 Fabricated hook shown sufficient serious competition capture tow hook advised should actuated spoiler servo Ballast Tubes Optional Should Ys od thin wall aluminum ardware store oles location shown high bottom wing left side die match holes ide fuselage 1/32 clear slug weighs appr Jontinu ld after age 122 August 1979 69 glue inbor c Two Sizes % ID 10 PRICE 2 lengths Comes ig two STUT FAIRINGS 3 Lengths fairings iiir size 225 cockpit coammn~ -r y COMES IN 3 FT LENGTHS SMALL 118 OR LARGE 114 THIS HINGE COMPLETELY SEALS CONTROL SURFACE AIR LOSS STRONG FLEXIBLE HINGE THAT IS ABLE TO MOVE ooney gapless hinges --* drive shaft broken classical failure mode tubular member under excessive torsional stress After brief discussion decided pull off propeller make hand-launched Gossa mer Glider Two assistants ran along side handles Bryan flew back hangar Paul assessed situation resolved replace drive shaft aluminum did temporarily present version has GFRP drive shaft Much additional work has done complete set spare parts has built enough build entire second aircraft Bryan has continued physical training designed peak first break weather over English channel Plans suitable hangar near Dover have abandoned since team can set up now five minutes planned move England April Im looking forward big attempt think theyll make Adventures/Harrah continued page 61 gravity seems help projected wing stab area about 2000 sq loading about 10 ounces per square foot flying surface little high weak thermals will have hunt out some boomers long flights short engine runs lighter covering little sanding in-sight weight reduc tion would bring down between 7- 8-pound figure Great thermaling al A1 Packaged 2 Ft Size AND PRICE 5195Ipkg GAP LESS HINGE SLOTTER Makes Slots 4 Sizes Balsa %-Y-Ae /4 PRICE S195 FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 Phone 503 357 2732 though doesnt take away neat sport model 9 pounds no tricks mounting Proctor hardware spring mounted set cables maintain tension 2 4 pounds usually required type slow flying plane faster planes require overcome air pressure control surfaces about 6 pounds used one-spring method others use two two-spring method allows control surface deflection both directions case inadvertently moved reducing potential damage system Proctor fittings give finishing touch scale models very functional needed Naturally already guessed half Sig lumberyard went project availability straight-grained spruce large sheets 1/16 ply made building lot easier Jugs Titebond glue some Devcon Slow Cure epoxy Wilhold R/C56 glue wind shields used put together Williams Bros inverted U spear used guide tail wheel Du-Bro wheels Fox wheel fittings rounded out ground support Well Sunday morning perfect first flight engine started right up test glides range check engine running perfect Checked high low throttle nose held vertical could offer no excuse stay ground moment truth hand Ner vous Taxi fine increased rpm went left over-corrected rudder same time parted company ground surprised about 2/3 throttle airborne about 25 feet happened original design pop-off struts came back earth moment realized heading light standard No J4 sticking out Leroys head winding up picture missed itby inches Regaining some control myself plane put slow right turn left wing panel creasing its dihedral cut throttle off managed just clear trees could keep nose up headed slow right spin gave full left rudder full up elevator hoping pop wheels wheels did hit just before nose damage minor plane major pride Repairs now process snap-off struts being re placed working screw-mounted struts go back next flight time will spent ground taxiing did fly Taylorcraft things con sidered lot achieved learned K&B 61 experiments prop tests Proctor control systems surpassed ex pectations two failings both design other pilot error lucky have little repair learned found K&B engine Taylorcraft can wonderful sport-flying oombination Thanks Sterling Peanut version great old bird we-fly can magnificent horror over have go find Diana Cream Invader/Smith continued page 69 4 Slide tubes fuselage epoxy heavily after roughing od corner file glue areas 5 File end tubes flush side fuselage secure ballast strip plastic tape Radie Installatien 1 Installation shown Kraft radio other radio used essential same structural configuration used side rails cross rails Positions may altered suit radio 2 Shape side rails fit contour fuselage Use Hobbypoxy #2 gluing area Epoxy side rails place Fabricate lay out drill cross rails braces epoxy place 3 Loose-install servos align anchor front end cables control linkages Remove servos 4 Sand center seams fuselage smooth wet-or-dry sand entire fuselage re move orange peel effect gel coat Finishpaint fuselage sand canopy bottom needed obtain good fit cut out rear canopy clear control mechan ism Install hook canopy hooks servo rails Finish paint canopy 5 One Airtronics skid other suitable skid installed Install radio hook up linkages Assemble finished tail surfaces 122 Model Aviation Winning Ideas FOURMOST specialize WINNING Ideas AVIATION JEWELRY Largest Aircraft Jewelry Selection World CUSTOM JEWELRY SPECIALISTS Interested dealers full line airplane jewelry write PO Box 56CM JAddison Dallas Texas 75001 -Ph 214 596 3505 CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L051 Specialists brochure send 1 Sc stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 Slide glass wing rod tube marked CG suspend fuselage wing rod resting two blocks equal height table Lay 1 quarter 1 nickel 1 penny stab spar Add ballast nose tail necessary bring fuselage level Fill nose fuselage foam blocks anchor ballast Wing 1 Build right wing first Cover plan wax paper 2 Cut fit bottom 1/16 sheeting fit inboard plan exactly butt polyhedral joint flap joint Leave leading edge little short just line visible Pin down leading edge making sure stick exactly 3/16 Some sticks wider way other Use straightedge make sure stick pinned down straight 3 Pin down 3/16 X 1/4 sub spar using straightedge step 2 4 Ribs 1 through 13 too long Cut off back ends establish correct length assembly Drill ribs No 1 through 8 spoiler tube 5 Glue ribs #1 #12 place 6 Cut top bottom ar length cut angle polyhedral end shown both spars 7 Install bottom spar Hot Stuff end keep place 8 Ribs #2 through #11 cut two same spar cross sections differ rib out #6 rib Rib #2 has entire 3/ spar section removed Ribs #34 5 6 have ved back spar notch leave front section remaining ribs #7 through #11 have removed center spar notches Cut ribs keeping halves matched install leading edge D section ribs use ribs position spar rib notch Hot Stuff spar bottom sheeting 9 Cut spar vertical members match detail both wings Dry-install top bottom spar check wing rod tubes will fit necessary roll piece sandpaper line-sand holes tubes Tubes should slide holes freely may necessary trim front back vertical spar members slip between tubes Pin down through sheeting sure wing flat table 10 Trim rear sections ribs #2 #3 fit Hot Stuff place Remove vertical spar sections prepare enough Hobbypoxy #2 epoxy spars wingrod tubes Assemble vertical spar members tubes including rear brass tube 11 Trim install rear sections ribs #4 through #12 12 Install rubberhookand 1/16 X5/8X 1-15/16 plywood reinforcements 13 Install top spar #2 epoxy re-coat wing-rod tubes heavily along ribs #1 #2 joints Plug tube ends 14 Install 11 LE backup pieces 15 Drill diagonal ribs spoiler tube install 16 Layoutandcutnotchinribs#7#8 #9 #10 #11 3/16 X 3/16 balsa stick install stick flush top rib 17 Install spoiler tube attach bottom 3/16 stick notched block 3/16 balsa 18 Box spoiler bay 1/16 balsa sheet keep dirt out wing 19 Reinforce glue joints needed Titebond epoxy 20 Do sheet top time Flap 1 Cut two pieces 1/32 sheet balsa 2 wide 3/32 shorter inner wing panel both bottom sections flaps Cut two pieces 1/32 sheet balsa X 2-1/32 top sheeting 2 Notch corner bottom sheeting 1 wide X 15/16 long fit plywood inserts flap actuator slot 3 Pin down bottom sheet 4 Cut plywood inserts shown detail epoxy stack After set check slot will slip easily 1/16 rod Run drill through safety guide hole make loose slip fit guide pin Hot Stuff assembly place 5 Sand angle top flap spar match angle rib 6 Pin down flap spar being sure parallel wing sub spar Hot Stuff bottom sheeting 7 Cut 24 ribs per detail cutting strip 1/16 sheet balsa 30 wide Cut off pieces 1 3/4 long straightedge cut diagonally 8 Install ribs 9 Install top sheeting August 1979 123 new_ruleasos Bucker JUNGMEISTER radi nn*rni 020 rubb powerclukey 36 span 12 channel RIC tree flight S1495 3wingspan Seagullfor rubber available soon C02 power SEEYOURsend25Uor DEALER NOWcatalog FLYLINE MODELS INC 220317035732038 OS WANKEL ROTARY Hobby Barn Special $8999 SUPER TIGRE X-29 SPEED OFF Hobby Barn Special $3899 %P K&B61 RIC HB Special $5999 Hobby Barn PO Box 17856-M Tucson Arizona 85731 American Made ReadyTo Fly 1 High Quality 2 3 & 4 Channel RIC Models Are Really Ready Radio & Engine Choicel Shown example line CARDINAL Sport An excellent first aileron ship also flies well rudder Rud der-Elevator-Aileron Steerable nose wheel 3 4 channel 58 span 460 sq wing area 4 lb weight 20-22 oz wing loading average radio 25 35 eng 29 rec commended Balsa sheeted foam core wing wheel pants included installed SeeISSUE OT ~920 San ta Fe T rail complete FLfl wiju- story write address below complete info Lenexa KS 66215 913492-81331 SPOMODEL KITSANEV ERA RUSLICATION m. IAEROBATIC AIRPLANES /I8Y POST C MORRISON 45 PAGES SX II 52 PHOTOS / IS DETAILED DRAWINGS STRINGLESS WONDERON NITS 18only 5395 PLUS POSTAGE KIT $29579 CATALOG $100 KIT $3 95 GUIDE OF RUEBEE MODEL SUPPLIESCATALOGS 3100REPLATECH L INTERNATIONAL INC PPIPO BOX 2498-MA49800 MC KENZIE HWY Wec-yaesLA MESA CALIP 92041VIDA OREGON 97485 Outboard Wing 1 Cover plan wax paper 2 Butt inboard wing section out board section plan inboard section propped up near rib #4 indicated plan with2 block Align perfectly pin down Joint will built 3 Cut pin down 1/16 bottom sheet ing rib *13 rib #21 fit plan leaving leading edge line barely exposed 4 Cut pin down leading edge end use straightedge pin down between 5 Cut pruce bottom spar length lay placedo glue 6 Cutribsparnotchoutofribs #12 #13 allow spar splice install now 7 Glue ribs * 14 through #21 allow ing ribs position spar 8 Make four spar splices trimming 50 dihedral 9 Fit top spar epoxy splices place 10 Add short sub spar rib #13 rein forcement epoxy along rib #13 11 Cut add 1/16 balsa shear web both sides spar shown using scrap ends sheeting 12 Unpin trailing edge rib #19 #21 cut washout shims 3/16 balsa Slide rear shim under trailing edge wax paper Slide end shim under wax paper position under rib #21 13 Sheet top panel washout built 14 Wing tip added after leading edge shaped wing panel sanded 15 Build left wing point com pletion before sheeting inboard section using left wing reference Finishing Inboard Section 1 Again check good fill epoxy around wing rod tubes reinforcements Add epoxy needed 2 Sheet top carefully trim spoiler bay 3 Cut spoiler blade fit opening 4 Cut sand ribs spoiler bay become floor blade leaving blade above surface slightly allow sanding wing contour sand ribs let spoiler barely below surface wing Finishing Wing 1 Plane sand bottom leading edge sheeting shown end view wing full span 2 Radius leading edgemake gage keep radius uniform 3 Sand trailing edge top continue rib contour until trailing edge 1/16 thick 4 Wing tip instructions plan 5 Finish sand MonoKote wing 6 Install spoiler pull-string blades 7 Butt flap against wing align ends have clearance both ends Temporarily tape bottom scotch tape masking tape Fold flap down against under side wing lay mylar -wide tape over wing sub spar flap spar Raise flap neutral position tape along bottom joint removing temporary tape go Flying 1 Be sure CG correct 2 Check warps wing 3 Check controls work freely return neutral 4 Set stab rudder neutral 5 Make first hand-glide running attitude feel lift judge speed Throw straight level fairly hard get controls quickly get straight level fast can almost gnarantee trimmed perfectly 6 High-Start launchkeep up speed A Set full down trim stab 1 24 Model Aviation great schoolyard scale TRAVEL AIR 6OOO plus $200 postage 602-747-3633 B Obtain least 10 lbs pull highstart C Lower flaps ling edge D Throw hard nose up 300 450 get controls quickly correct turn too nose-high attitude Remember Invader flies faster sailpianes Keep speed up As launch progresses return stab trim neutral Begin hold slight up stab towards top launch until ready release Winch Launch Set stab rudder neutral Keep up speed B Lower flaps eload winch stand switch throw hard nose up 300 being careful lose balance Immediately start pulsing winch keep speed rela tively high until familiar launch/stall characteristics Dont try fantastic launches until get some practice first few flights used get familiar bird Fly straight level flaps launch position neutral stab trim feel out turns stalls Land flaps same position Flap Settings Launchdown trating trackingneutral Thermalingdown flap tight circle Let-down altitudefull flaps spoilers dive straight spiral 300 450 nose-down Landingwindy neutral Calm Trim LaunchHigh-start down Winch neutral Thermalingup required Penetratingslight down Landingneutral sailplane designed cover area Use way Dont park float unless known no lift around floating dynamic soaring order crank up trim determined experience fly gently few control movements possible thermaling keep turns flat possible again move controls needed nose tends drop tight turns requires up trim possibly some outside rudder Keep speed fairly high unless super lift up trim can help speed distance 8 oz 24 oz ballast required depending condi tions Eight oz ballast hardly affects sink rate sometimes used duration flights landing will skid landed flat however slight dork will nail spot throw dirt over top will stop Letters Editor continued page 5 fixtures floor lamps everything goes right can wind have Midwest winder mounted suction cup vise launch retrieve leaving chair old mans flying.. Wouldnt fun have contest winner contestant 1 minute flights during shindig everybody flys winds etc dont need timers need counters L F Randolph Dallas TX Sanity Pylon Sanity Racing nice article have concluded rules making procedure too democratic fellow Kilsdonk comes U/C speed completely undoes what lot us have doing pylon has com pletely different frame reference trying turn fun event specialist event won machine shop Unfortunately history AMA events net result shall use own WILLI rules continue have fun Frank B Baker Madison WI As know afamiliarprob tern No matter what ideals attach founding new eventbeginners fun etctechnical aspects attendant skill levels remorsely escalate nature competition note group clubs intends hang onto own special-event rules have effec tive attracting new pylon fliers Nor can blame Big John doing what comes naturally food thought.. Export Messerschmitt January issue Model Aviation free flight column page 61 published picture Bill Noonan Messerschmitt 20B stated plan published MA Although have subscription 1979 issues have yet received issue giving further details plan should glad could let know will available reason later year will holding rubber scale contest England probably Nationals would seem fine example such contest However time getting bit short way could let have copy plan quickly would grateful knowing much will cost cannot send money stage would gladly hearing what worth would mention am Editor SMAE NEWS Needless say think maga zine excellentit far superior anyAugust 1979 125 PRESENTING THE OCTURA F MOTOR MOUNT Almost quickly can say Swift Switch CHANGE FROM 60 TO 45 ENGINE OR VICE VERSA WITHOUT REMOVING THE ENTIRE MOUNT FROM HULL THE INSERT ON WHICH ENGINE IS MOUNTED! Featur d minimum parts Strong light extruded aluminum onepiece base onepiece insert 5 wide Interchanges Octura 556 5-60 Motor Mounts Ideally suited deep vee hulls Insert deep enough accomodate 65 engines Price $1550 per assembly md insert Additional inserts $550 sa Inserts sized drilled tapped popular marine engines $750 ea Order directly Only available local hobby dealer add 10% poatage Illinois residents add additional 5/ sales tao Send 5OZ catalOg OCTURA MODELS INC price list Celebrating 25th year 7351 N Hamlin Ave ie IL 60076 OCT I MODEL MARINE SUPPLIES SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1979/08
Page Numbers: 65, 66, 67, 68, 69, 122, 123, 124, 125
NO OCR TEXT THE Invader has flying four years now beginning much simpler sailplane same basic design MK IV has gone through four stages develop ment better performance structural strength until now what believe super competition sailplane will take Preceding page Beautiful young lady Herbs daughter Christine Martin beautiful sailplane azure skies snowcapped peaks Colorado Rockies delightful photo other pictures Maurice Kaiser punishment can give Its 1978 performance speaks itself have flown itto become 1978 Rocky Moun tain Soaring Association club champion attained rank Master Flyer 1st place 1978 LSF Regional Tournament 8th place FM USA Team Selection finals 1st place four RMSA AMA contests 1st place Pikes Peak RC contest several 2nd places has competition host formidable opponents RMSA including Skip Miller mention 40 best Pensacola initial concept came about through evaluation contest tasks both AMA FAI goal being design sail plane capable performing well tasks weather conditions boiled down five requirements must light-air floater must super strong must fast speed tasks must able penetrate wind have good L/D ratio distance thermal 66 Model Aviation Construction poly break before top sheeting has bean added Compare plan top view sea spar cross sections along plan top construction wing root before top sheeting ply pieces three glass tubee spar locked togetherrubber hook just aft Attop lathe basic frame ruddernote sturdy hinging arrangement mount small fin Below half all-flying stab servo rail arrangement shown detailed plan Rails spruce laminated ply cross pieces Servo positions throws given Convenient-to-use ballast tubes rest spruce cradle seen three circular openings just above two hookthis captured Fin ruggedly built tuselage plans OCtIl uaisa Talring blocks minimize disturbed air fin/stabilizer junction Rudder clevis shows FULL SIZE PLANS AVAILABLE. SEE PAGE 128 _-_ _I_ _ _ _ ___ _ _1_J88848~ jJ _ _ _K L4 INVADER MK N S 888888888 88888C838008T880888880888 OS 880888 888 888 8 8 888888 8A880C8808/8O8C7y8--- 8- 8NE8O8 88888B SO-IS88888 8083888888888808 88888888 51188 88888080888888 -8888888V888f} 848888888884 8 88 8 8888888 88888 L8888888888J ffl882c888 88 83V888888880~ INVADER MK& hunting ribs plus 1/16 sheeting entire wing altitude high-speed dives fear accomplished starting virtually bullet-proofflutter full flap spoilers can super clean airframe speed LID course beef adds weightbe brought down moderate dive low ratio Large flaps change airfoil camberwhich ends up 85 oz per sq ft wingspeed Getting down never problem full-flying stab change angle attackloading have found simply makes MK IV free flight must floating light air As strength thethe plane fly faster lets airfoil workbe flown time except super calm entire sailplane just strong Especi-at higher Reynolds number rate itair mainly because reacts slightest ally wing has super sparis still floaterdisturbance air still very stable diagonal ribbing addition conventional MK IV can brought down fromespecially very high speeds very August 1979 67 Spoiler wade snown enenaea Iross section aT spoiler detail plans shows actuation methodfitting under spoiler may seen picture wing panel joins fuselage Note generous flap left picture Combo flap flying tail broadens performance range respon Flowris very docile siinter mediate competition sa Try snap roll just give full ups hold let wh fun barrel mor Instructioni Fin Rudder Assemble spars hinge assembly 1 Rudder sparsi18 X 1/4 spruce 2 pieces Notch hinge tab tions spars contact c hinge tabs sandwiched between 2 Fin spars 2 spruce 2 pieces Same step 3 Dry-run-assemble fin spar rudder spar hinges 3/32 piano wire hinge pin place Clamp together Check hinge positions free movement satis fied epoxy 5 minutes slow dry spar hinge units being careful get epoxy hinge bearings Note Some hinge holes tighter others may necessitate making pin smaller chuck pm drill polish down using 400 320 wet dry paper Carve clearance opposite hinge bosses fin rudder spars 4 Assemble fin first Put wax paper plan Assemble inner frame first consists fin/spar hinge assembly bottom X ce piece 3/32 hole drilled position shown control cable housing accurately possible location hole 3 pieces alsa Epoxy unit together wipe excess off top sticks B Remove plan dry add thick balsa fillet front fin airfoil time C Trim top hinge tab clear stab hinge tube trying 1/32 plywood side brass tube through hole Trim sand top edges 1/32 plywood sides align top stab boss comparing plan brass tube through hole both side pieces alignment neutral position stab D Rough outer stab cable housing areas epoxy 4 spruce top housing exact and exact contour shown un balsa stick needed -dry-assemble two ass tube place against fin vi through vood su h 1 thinly dure extenos w two ways F wo stab boss leu stab hinge tube sure hole 5/16 sides boss Glue both parts ii being careful make top parallel ood G Sheet fin above stab 1/16 balsa Cut radius slot front stab rod brass tube 1 radius rear hinge hole Allow full el way After stab assembled check moves freely necessary widen radius slot H Airfoil leading edge fix fuselage time Will covered fuselage instructions Rudder 1 Cover plan wax paper 2 Make shims shown right ruddi 4 Pin down TE shims shown being sure 1/32 pad 1/16 inside rear plan shown 5 Cut TE stock top piece pin glue place Trim top piece after rudder removed plan 6 Cut remaining perimeter sticks pin place using proper shims glue Note 1/8 X 3/16 stick just above fin should fit around hinge boss epoxied along gusset 7 Cut fit glue diagonal rib sticks being sure use shims under end 8 Remove plan cut two pieces pruce control horn boss Notch inside slightly two pieces will andwich over hinge tab epoxy plan wax E stock4pcstofit s 1/32 base type Pin glue TE place ut pin glue LE tip pieces Use 1/32 shims under LE 3 Cut two pieces 1/8 X 3/16 balsa about 3 long Stack together mark hole locations too far end 1 center-to-center dimensions should accurate possible Holes should cen tered stick drilled square through sticks Mark top sticks keep inverting assembly still pinned together trim ends position holes correct distance end glue place time 4 Squeeze s tubes about pliersvery slightly File sand radius ends stab rods push through tube until will push through snugly Remember will two rods place assembly therefore twice hold ing power keep stab rods 5 Insert brass tubes drilled sticks squeezed ends outboard check alignment sure ends tubes flush sticks pin glue assembly place holes well centered sticks place 1/32 shim under outboard ends tubes sure tubes square plan parallel 6 Cut two 1/8 X 3/16 balsa sticks butt outboard ends tubes glue place Cut 4 pieces 1/8 X 3/16 balsa fit along 68 Model Aviation control horn position bottom rudder e line up control r e should ce n ton glue 11 Fi1 sande stick plan 3 Pin rudder spar hinge assembly place fiat plan establishes center line e plan Behind recelverand batterythe fourservos oompactiyarrangedagain check rail planform detail top L R rudder fiap servos bottom L R Stab spoilerltow hook servos tide o epoxy entire stress e 1/16 X 3/16 cross place flat plan rners - ut 1/16 spars piec shape desired cross sticks 1/16 sq balsa sanded sym Lrical airfoil 11 Radius LE finish-sand covering Fuselage 1 Drill file elongated slot left rear side wing boss permit entry spruce cross brace Insert spruce through slot until butts opposite side mark stick Remove cut notch 3/16 deep about 1/32 inside mark re-insert stick check length Trim fit until will bear against both sides Epoxy place after set cut off flush wing boss 2 Rough 3/32 X 2-9/16 brass tube corner file epoxy rear wing rod hole Install two fiberglass tubes epoxy prom inside Cutandfit X cecrossbraceat wing boss Keep high location r clear spoiler pull Epoxy assembly Use acid horn 3/32 X fl centerline neces t bolt tuuCs Sc prevent B Snap ends brass tube fuselage Use 1 guide through fuselage hole bly through canopy opening rod handle slip steel roa tube guide hole side fuselage Use little pressure wiggle tube too long may filed shorter minimum 2/s must extend 1/32 out side fuselage ticklish job will go patience may necessary file bevel end brass tube Once tube has entered side slide steel rod through both sides fuselage slide brass tube through other side C Bend 1/16 piano wire 2 pcs 900 7/8 long shown detail Clean inside brass tube acetone alcohol pushing small saturated piece tissue paper through hole Use soldering gun acid core solder unit Cut small pieces solder insert end tube trying get some acid Hold soldering gun end tube melt solder tin inside tube same other end Rough ends 1/16 wire fit brass tube tin solder D Clamp tape control rod hold control horn position slightly aft straight down point need helper pair pliers Center brass tube fuselage extend equally side fuselage Have helper hold fuselage steady hold end brass tube sliding Slip brass washer opposite end hold bent wire pliers end wire Heat tinned end holdingagainst end brass tube till solder melts wire begins slide Apply solder push wire tion parallel bottom wing boss Hold heat till sure solder has flowed inside tube Continue holding wire till solder changes color indicating solid E Release control rod capture side just soldered slip piece cardboard piece paper folded 5 6 thicknesses about 1/64 between washer fuselage tape place provide end play through fuselage Cut 3/16 X 3/8 spruce side rails length shown plan use alignment tools solder other flap wire place Slide rod through rear wing rod tube soldered side place spruce stick top flap wire extend under wing rod hold place two clothes pins small clamps Clamp very lightly crush spruce causing misalignment Again cap ture control rod before have helper hold fuselage flap wire just soldered will pushed through Clamp other wire spruce stick slip brass washer hold wire against tube holding ruce up under wing rod matching other soldering gun repeat pro other side 3 sloppy loose us iides slide hole slot return Assemble Fin 1 Drill hole top ruse control cable Hole may up -i 2 Try fin fit Spar should butt ens fuselage bottom hinge tab slide insiae 3 Insert long wing rod wing rod tube tape centered 4 Slip stab rod stab hinge hole sight wing rod level Use straight edge down side fm center compare seam fuselage 5 Remove flat file top fuselage fin contacts Coat contact area 5-minute epoxy repeat operation No4 Hold hand keep checking alignment till epoxy sets 6 Fillet fin fuselage epoxy 7 Epoxy stab control inside fuselage shown through rear fuselage Tail Cone Skid 1 Cut notch balsa block 9/16 deep fit over fin spar hinge Slip block place press hard against end fuse lage Pencil mark diameter fuselage end block Remove make circular cut 1/32 deep 1/8 front block Carve step end block slip inside fuselage cutting approximately 1/32 inside fuselage mark end block Re-coat fin spar epoxy coat contact areas block install 2 Carve block shape sand 3 Cut skid shape radius notch fit clear rudder pin Skid will off center File groove around end rudder pin help removal Epoxy skid place safety pin should used keep rudder pin coming out Rudder Control Cable 1 Cable may exited left right side depending servo travel Drill 5/32 hole centerline exit shown plan approximately centerline fuselage w top fuselage 2/s end fuselage 2 With small round file angle exit hole till cable housing will exit straight line towards rudder horn 3 Epoxy place end housing 2 m end fuselage other end running under flap actuator tube over ballast tubes Stab actuator cable follows same route Tow Hook 1 Position shown plane op timum performancesee flight instructions 2 Fabricated hook shown sufficient serious competition capture tow hook advised should actuated spoiler servo Ballast Tubes Optional Should Ys od thin wall aluminum ardware store oles location shown high bottom wing left side die match holes ide fuselage 1/32 clear slug weighs appr Jontinu ld after age 122 August 1979 69 glue inbor c Two Sizes % ID 10 PRICE 2 lengths Comes ig two STUT FAIRINGS 3 Lengths fairings iiir size 225 cockpit coammn~ -r y COMES IN 3 FT LENGTHS SMALL 118 OR LARGE 114 THIS HINGE COMPLETELY SEALS CONTROL SURFACE AIR LOSS STRONG FLEXIBLE HINGE THAT IS ABLE TO MOVE ooney gapless hinges --* drive shaft broken classical failure mode tubular member under excessive torsional stress After brief discussion decided pull off propeller make hand-launched Gossa mer Glider Two assistants ran along side handles Bryan flew back hangar Paul assessed situation resolved replace drive shaft aluminum did temporarily present version has GFRP drive shaft Much additional work has done complete set spare parts has built enough build entire second aircraft Bryan has continued physical training designed peak first break weather over English channel Plans suitable hangar near Dover have abandoned since team can set up now five minutes planned move England April Im looking forward big attempt think theyll make Adventures/Harrah continued page 61 gravity seems help projected wing stab area about 2000 sq loading about 10 ounces per square foot flying surface little high weak thermals will have hunt out some boomers long flights short engine runs lighter covering little sanding in-sight weight reduc tion would bring down between 7- 8-pound figure Great thermaling al A1 Packaged 2 Ft Size AND PRICE 5195Ipkg GAP LESS HINGE SLOTTER Makes Slots 4 Sizes Balsa %-Y-Ae /4 PRICE S195 FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 Phone 503 357 2732 though doesnt take away neat sport model 9 pounds no tricks mounting Proctor hardware spring mounted set cables maintain tension 2 4 pounds usually required type slow flying plane faster planes require overcome air pressure control surfaces about 6 pounds used one-spring method others use two two-spring method allows control surface deflection both directions case inadvertently moved reducing potential damage system Proctor fittings give finishing touch scale models very functional needed Naturally already guessed half Sig lumberyard went project availability straight-grained spruce large sheets 1/16 ply made building lot easier Jugs Titebond glue some Devcon Slow Cure epoxy Wilhold R/C56 glue wind shields used put together Williams Bros inverted U spear used guide tail wheel Du-Bro wheels Fox wheel fittings rounded out ground support Well Sunday morning perfect first flight engine started right up test glides range check engine running perfect Checked high low throttle nose held vertical could offer no excuse stay ground moment truth hand Ner vous Taxi fine increased rpm went left over-corrected rudder same time parted company ground surprised about 2/3 throttle airborne about 25 feet happened original design pop-off struts came back earth moment realized heading light standard No J4 sticking out Leroys head winding up picture missed itby inches Regaining some control myself plane put slow right turn left wing panel creasing its dihedral cut throttle off managed just clear trees could keep nose up headed slow right spin gave full left rudder full up elevator hoping pop wheels wheels did hit just before nose damage minor plane major pride Repairs now process snap-off struts being re placed working screw-mounted struts go back next flight time will spent ground taxiing did fly Taylorcraft things con sidered lot achieved learned K&B 61 experiments prop tests Proctor control systems surpassed ex pectations two failings both design other pilot error lucky have little repair learned found K&B engine Taylorcraft can wonderful sport-flying oombination Thanks Sterling Peanut version great old bird we-fly can magnificent horror over have go find Diana Cream Invader/Smith continued page 69 4 Slide tubes fuselage epoxy heavily after roughing od corner file glue areas 5 File end tubes flush side fuselage secure ballast strip plastic tape Radie Installatien 1 Installation shown Kraft radio other radio used essential same structural configuration used side rails cross rails Positions may altered suit radio 2 Shape side rails fit contour fuselage Use Hobbypoxy #2 gluing area Epoxy side rails place Fabricate lay out drill cross rails braces epoxy place 3 Loose-install servos align anchor front end cables control linkages Remove servos 4 Sand center seams fuselage smooth wet-or-dry sand entire fuselage re move orange peel effect gel coat Finishpaint fuselage sand canopy bottom needed obtain good fit cut out rear canopy clear control mechan ism Install hook canopy hooks servo rails Finish paint canopy 5 One Airtronics skid other suitable skid installed Install radio hook up linkages Assemble finished tail surfaces 122 Model Aviation Winning Ideas FOURMOST specialize WINNING Ideas AVIATION JEWELRY Largest Aircraft Jewelry Selection World CUSTOM JEWELRY SPECIALISTS Interested dealers full line airplane jewelry write PO Box 56CM JAddison Dallas Texas 75001 -Ph 214 596 3505 CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049L051 Specialists brochure send 1 Sc stamp Kustom Kraftsmanship Brochure Box 2699 Laguna Hills CA 92653 714 830-5162 Slide glass wing rod tube marked CG suspend fuselage wing rod resting two blocks equal height table Lay 1 quarter 1 nickel 1 penny stab spar Add ballast nose tail necessary bring fuselage level Fill nose fuselage foam blocks anchor ballast Wing 1 Build right wing first Cover plan wax paper 2 Cut fit bottom 1/16 sheeting fit inboard plan exactly butt polyhedral joint flap joint Leave leading edge little short just line visible Pin down leading edge making sure stick exactly 3/16 Some sticks wider way other Use straightedge make sure stick pinned down straight 3 Pin down 3/16 X 1/4 sub spar using straightedge step 2 4 Ribs 1 through 13 too long Cut off back ends establish correct length assembly Drill ribs No 1 through 8 spoiler tube 5 Glue ribs #1 #12 place 6 Cut top bottom ar length cut angle polyhedral end shown both spars 7 Install bottom spar Hot Stuff end keep place 8 Ribs #2 through #11 cut two same spar cross sections differ rib out #6 rib Rib #2 has entire 3/ spar section removed Ribs #34 5 6 have ved back spar notch leave front section remaining ribs #7 through #11 have removed center spar notches Cut ribs keeping halves matched install leading edge D section ribs use ribs position spar rib notch Hot Stuff spar bottom sheeting 9 Cut spar vertical members match detail both wings Dry-install top bottom spar check wing rod tubes will fit necessary roll piece sandpaper line-sand holes tubes Tubes should slide holes freely may necessary trim front back vertical spar members slip between tubes Pin down through sheeting sure wing flat table 10 Trim rear sections ribs #2 #3 fit Hot Stuff place Remove vertical spar sections prepare enough Hobbypoxy #2 epoxy spars wingrod tubes Assemble vertical spar members tubes including rear brass tube 11 Trim install rear sections ribs #4 through #12 12 Install rubberhookand 1/16 X5/8X 1-15/16 plywood reinforcements 13 Install top spar #2 epoxy re-coat wing-rod tubes heavily along ribs #1 #2 joints Plug tube ends 14 Install 11 LE backup pieces 15 Drill diagonal ribs spoiler tube install 16 Layoutandcutnotchinribs#7#8 #9 #10 #11 3/16 X 3/16 balsa stick install stick flush top rib 17 Install spoiler tube attach bottom 3/16 stick notched block 3/16 balsa 18 Box spoiler bay 1/16 balsa sheet keep dirt out wing 19 Reinforce glue joints needed Titebond epoxy 20 Do sheet top time Flap 1 Cut two pieces 1/32 sheet balsa 2 wide 3/32 shorter inner wing panel both bottom sections flaps Cut two pieces 1/32 sheet balsa X 2-1/32 top sheeting 2 Notch corner bottom sheeting 1 wide X 15/16 long fit plywood inserts flap actuator slot 3 Pin down bottom sheet 4 Cut plywood inserts shown detail epoxy stack After set check slot will slip easily 1/16 rod Run drill through safety guide hole make loose slip fit guide pin Hot Stuff assembly place 5 Sand angle top flap spar match angle rib 6 Pin down flap spar being sure parallel wing sub spar Hot Stuff bottom sheeting 7 Cut 24 ribs per detail cutting strip 1/16 sheet balsa 30 wide Cut off pieces 1 3/4 long straightedge cut diagonally 8 Install ribs 9 Install top sheeting August 1979 123 new_ruleasos Bucker JUNGMEISTER radi nn*rni 020 rubb powerclukey 36 span 12 channel RIC tree flight S1495 3wingspan Seagullfor rubber available soon C02 power SEEYOURsend25Uor DEALER NOWcatalog FLYLINE MODELS INC 220317035732038 OS WANKEL ROTARY Hobby Barn Special $8999 SUPER TIGRE X-29 SPEED OFF Hobby Barn Special $3899 %P K&B61 RIC HB Special $5999 Hobby Barn PO Box 17856-M Tucson Arizona 85731 American Made ReadyTo Fly 1 High Quality 2 3 & 4 Channel RIC Models Are Really Ready Radio & Engine Choicel Shown example line CARDINAL Sport An excellent first aileron ship also flies well rudder Rud der-Elevator-Aileron Steerable nose wheel 3 4 channel 58 span 460 sq wing area 4 lb weight 20-22 oz wing loading average radio 25 35 eng 29 rec commended Balsa sheeted foam core wing wheel pants included installed SeeISSUE OT ~920 San ta Fe T rail complete FLfl wiju- story write address below complete info Lenexa KS 66215 913492-81331 SPOMODEL KITSANEV ERA RUSLICATION m. IAEROBATIC AIRPLANES /I8Y POST C MORRISON 45 PAGES SX II 52 PHOTOS / IS DETAILED DRAWINGS STRINGLESS WONDERON NITS 18only 5395 PLUS POSTAGE KIT $29579 CATALOG $100 KIT $3 95 GUIDE OF RUEBEE MODEL SUPPLIESCATALOGS 3100REPLATECH L INTERNATIONAL INC PPIPO BOX 2498-MA49800 MC KENZIE HWY Wec-yaesLA MESA CALIP 92041VIDA OREGON 97485 Outboard Wing 1 Cover plan wax paper 2 Butt inboard wing section out board section plan inboard section propped up near rib #4 indicated plan with2 block Align perfectly pin down Joint will built 3 Cut pin down 1/16 bottom sheet ing rib *13 rib #21 fit plan leaving leading edge line barely exposed 4 Cut pin down leading edge end use straightedge pin down between 5 Cut pruce bottom spar length lay placedo glue 6 Cutribsparnotchoutofribs #12 #13 allow spar splice install now 7 Glue ribs * 14 through #21 allow ing ribs position spar 8 Make four spar splices trimming 50 dihedral 9 Fit top spar epoxy splices place 10 Add short sub spar rib #13 rein forcement epoxy along rib #13 11 Cut add 1/16 balsa shear web both sides spar shown using scrap ends sheeting 12 Unpin trailing edge rib #19 #21 cut washout shims 3/16 balsa Slide rear shim under trailing edge wax paper Slide end shim under wax paper position under rib #21 13 Sheet top panel washout built 14 Wing tip added after leading edge shaped wing panel sanded 15 Build left wing point com pletion before sheeting inboard section using left wing reference Finishing Inboard Section 1 Again check good fill epoxy around wing rod tubes reinforcements Add epoxy needed 2 Sheet top carefully trim spoiler bay 3 Cut spoiler blade fit opening 4 Cut sand ribs spoiler bay become floor blade leaving blade above surface slightly allow sanding wing contour sand ribs let spoiler barely below surface wing Finishing Wing 1 Plane sand bottom leading edge sheeting shown end view wing full span 2 Radius leading edgemake gage keep radius uniform 3 Sand trailing edge top continue rib contour until trailing edge 1/16 thick 4 Wing tip instructions plan 5 Finish sand MonoKote wing 6 Install spoiler pull-string blades 7 Butt flap against wing align ends have clearance both ends Temporarily tape bottom scotch tape masking tape Fold flap down against under side wing lay mylar -wide tape over wing sub spar flap spar Raise flap neutral position tape along bottom joint removing temporary tape go Flying 1 Be sure CG correct 2 Check warps wing 3 Check controls work freely return neutral 4 Set stab rudder neutral 5 Make first hand-glide running attitude feel lift judge speed Throw straight level fairly hard get controls quickly get straight level fast can almost gnarantee trimmed perfectly 6 High-Start launchkeep up speed A Set full down trim stab 1 24 Model Aviation great schoolyard scale TRAVEL AIR 6OOO plus $200 postage 602-747-3633 B Obtain least 10 lbs pull highstart C Lower flaps ling edge D Throw hard nose up 300 450 get controls quickly correct turn too nose-high attitude Remember Invader flies faster sailpianes Keep speed up As launch progresses return stab trim neutral Begin hold slight up stab towards top launch until ready release Winch Launch Set stab rudder neutral Keep up speed B Lower flaps eload winch stand switch throw hard nose up 300 being careful lose balance Immediately start pulsing winch keep speed rela tively high until familiar launch/stall characteristics Dont try fantastic launches until get some practice first few flights used get familiar bird Fly straight level flaps launch position neutral stab trim feel out turns stalls Land flaps same position Flap Settings Launchdown trating trackingneutral Thermalingdown flap tight circle Let-down altitudefull flaps spoilers dive straight spiral 300 450 nose-down Landingwindy neutral Calm Trim LaunchHigh-start down Winch neutral Thermalingup required Penetratingslight down Landingneutral sailplane designed cover area Use way Dont park float unless known no lift around floating dynamic soaring order crank up trim determined experience fly gently few control movements possible thermaling keep turns flat possible again move controls needed nose tends drop tight turns requires up trim possibly some outside rudder Keep speed fairly high unless super lift up trim can help speed distance 8 oz 24 oz ballast required depending condi tions Eight oz ballast hardly affects sink rate sometimes used duration flights landing will skid landed flat however slight dork will nail spot throw dirt over top will stop Letters Editor continued page 5 fixtures floor lamps everything goes right can wind have Midwest winder mounted suction cup vise launch retrieve leaving chair old mans flying.. Wouldnt fun have contest winner contestant 1 minute flights during shindig everybody flys winds etc dont need timers need counters L F Randolph Dallas TX Sanity Pylon Sanity Racing nice article have concluded rules making procedure too democratic fellow Kilsdonk comes U/C speed completely undoes what lot us have doing pylon has com pletely different frame reference trying turn fun event specialist event won machine shop Unfortunately history AMA events net result shall use own WILLI rules continue have fun Frank B Baker Madison WI As know afamiliarprob tern No matter what ideals attach founding new eventbeginners fun etctechnical aspects attendant skill levels remorsely escalate nature competition note group clubs intends hang onto own special-event rules have effec tive attracting new pylon fliers Nor can blame Big John doing what comes naturally food thought.. Export Messerschmitt January issue Model Aviation free flight column page 61 published picture Bill Noonan Messerschmitt 20B stated plan published MA Although have subscription 1979 issues have yet received issue giving further details plan should glad could let know will available reason later year will holding rubber scale contest England probably Nationals would seem fine example such contest However time getting bit short way could let have copy plan quickly would grateful knowing much will cost cannot send money stage would gladly hearing what worth would mention am Editor SMAE NEWS Needless say think maga zine excellentit far superior anyAugust 1979 125 PRESENTING THE OCTURA F MOTOR MOUNT Almost quickly can say Swift Switch CHANGE FROM 60 TO 45 ENGINE OR VICE VERSA WITHOUT REMOVING THE ENTIRE MOUNT FROM HULL THE INSERT ON WHICH ENGINE IS MOUNTED! Featur d minimum parts Strong light extruded aluminum onepiece base onepiece insert 5 wide Interchanges Octura 556 5-60 Motor Mounts Ideally suited deep vee hulls Insert deep enough accomodate 65 engines Price $1550 per assembly md insert Additional inserts $550 sa Inserts sized drilled tapped popular marine engines $750 ea Order directly Only available local hobby dealer add 10% poatage Illinois residents add additional 5/ sales tao Send 5OZ catalOg OCTURA MODELS INC price list Celebrating 25th year 7351 N Hamlin Ave ie IL 60076 OCT I MODEL MARINE SUPPLIES SAFE FLYING IS NO ACCIDENT