THIS IS THE SAGA years efforts Stunt competition outcome adventure has superior-flying air craft has will continue competitive levels Precision Aerobatics competition Competitor II turns well tracks better ST 60 nose has enough power complete pattern winds up 20 mph might question use word saga beginning article after reading illustrious introduction word chosen after run bad luck poor engineering led build ing three models five months first lost due folded wing effort build really light foolish use A-in spruce spars wing also failed locate ner ribs conjunction fuselage sides effect asking two small pieces spruce some /6-in contest balsa carry load entire wing An amateur should have seen problem coming needed hit head didnt take too long got about 30 flights airplane second airplane fell prey stooge cruel sense humor airplane beefed-up wing structure shown accompanying plans excellent flier achieved first-ever Expert win over 500 flights out practicing three weeks prior 1984 Nationals alone always-faithful stooge stooge thought might enjoy watching outside circle airplane flew Needless say dumbfounded Nats airplane took skies itself flew almost mile before plummeting ground resound ing crunch 68Model Aviation Top Picture Yourauthor/designer hiswayto second-place conteatfinish Com petitor II didnt say judging picture wed say performs well grass circle Above ship rather large designed all-out Precision Aerobatics competition 825 sq wing provides lift Supertigre 60 engine pro vides right power forthe 58-oz beautyto Precision Aerobatics pattern ease Youd think advanced state Control Line Precision Aerobatics models designs would fit mold tunately still folks attemp ting improve breed including author lightly-loaded model 60 engine Pete Bergstrom Up point season busy working various projects including article did have backup plane built three weeks away first Nationals com petition didnt have airplane fly quickly cleared workbench enlisted aid some friends Construc tion began flew model first time just three days before departing Reno finally finished trim appearance work night before leaving put two days hard practicing Reno Sunday Monday found out unneces sarily spooked high density alti tude went out again Monday night practice second flight night elevator pushrod failed metal fatigue after first loop four-leaf clover foolishly used brass quik-link connector heat soldering music wire pushrod softened brass build Competitor II use hardened steel link dont take chances Design theory some definite goals sat down last fall come up new airplane following year wanted airplane would turn blind ing corners track well penetrate give line tension wind could possibly need order solve problem blind ing turn went what thought would significant contribution extremely light wing loading first airplane weighed 49 oz giving wing loading 85 oz/sq ft lighter loading average competi tion Sailplane has airplane would surely turn sacrificed structural integrity light weight building phase wing didnt hold up next airplane weighed 57 oz due partially beefed-up wing ly rushed building job un necessary weight removed lacked suitable contest balsa gave wing loading 101 oz/sq ft provid ed very acceptable turn giving ship sufficient structural integ rity stooge let go put approximately 175 flights airplane six weeks order airplane track well left nose fairly long take advantage stabilizing effect propeller conjunction good-sized tail moment provides dampening effect center gravity CG locat ed well rear shown plans long tail moment provides enough force turn airplane extremely well prefer fly airplanes CG well rear almost point being tail-heavy order get maneuverability out nice stable forward-located CG great sport flier racer anything else expected maintain level flight through out entire circle ask airplane perform violent set maneuvers albeit beautiful such Precision Aerobatics pattern rearward CG will optimize aerodynamic proper ties aircraft make performing pattern much easier pilot theory good wind penetration simple overpower model could February 198569 Stunters today offering appearance jet aircraft Competitor Ils side view reminiscent full-size aerobatics plane provides welcome relief Upside-down isnt normal way start Supertigre 60 contest jitters dont get em helped cause flooded engine Bergstrom right others unidentified have sharpened leading edge would have degraded turning ability created early stall point fore opted go thick wing sec tion blunt nose allow airplane perform expectations simply put enough horsepower bully way through overhead figures pattern wind ST 60 chosen because brute horsepower 05 Max 45 has horsepower ST 60 rather because has usable power torque speed Stunt fliers like run engines size Competitor II allows run 13-in props associated yaw problems common large pro pellersand calm conditions 14-in props well does wonders line tension well turning usable power wind penetration subject line ten sion will notice have cluded movable rudder plane nor rudder offset time feel need either features build crooked fuselage straight fuselage rudder trim adds unwanted yawing motion makes difficulty trimming model phases flight Cowl design provides adequate cooling line tension comes engine power True adjusting lead-outs can provide some tension certain parts pattern cannot man ufacture line tension method same light can add pounds tip weight improve tension top will able avoid dropping wing good hard corner Its simple dont have line tension basic airframe/power plant combination will never manufacture will always have settle compromised situation best Construction Although airplane difficult build designed beginner Rather designed expert flier wants edge competition advanced flier looking move expert ranks Therefore am going clude blow-by-blow description construction rather Ill highlight im portant points Wing wing basic D-tube construc tion landing gear blocks secured 1A ply doublers W4 W6 lead-out guide constructed aluminum brass support piece X6-in aluminum cutout center slider movement individ ual guides constructed X6-in aluminum back plate brass eyelet wire pass through piece oc tagonal brass tubing spacer run cutout support piece washer slid over eyelet Continued page 156 70Model Aviation Hatch behind canopy provides access adjustable control system helps make flight trimming easier Total throw system can adjusted max pilot comfort Engine compartment clean uncluttered single hold-down boitforthe tank provkies ease adjustment muffler SST Specialty Products weighs mere 10 grams CL Speed/Hem pel Continued page 153 155mm pitch 61 secondbest flight placed Otello Vitre Italy 1638 mph 26370 kph using new OPS 25cc engines engines exhibited very good potential fast FAI Speed engines Italian models mounted sideways utilized single-blade prop design lao Guojun third-best flight day speed 1637 mph 2635 kph Friday September 21 last ficial flying day F2A Speed Hun garians really turned three best flights day capture World Speed Championship trophy second time fastest time day earned JozsefMolnar second place 1735 mph 2792 kph Sandor Szegedi time 1734 mph 2790 kph however Thursday flight 2801 kph good first place Jozsef Mult placed third speed 1727 mph 2779 kph Hungarian Speed team mem bers used Rossi engine handcarved single-blade props models utilized longest wingswhich made venetian blind slats really worked quite well just marked pattern desired aluminum slat sheared off excess upper lower halves glued together hardwood spar through center sup port rigidity wingspan models ranged 48 55 carrying cases models con structed meticulouslyjust like mod els themselves Saturday September 22 day everyone waiting momentous event winning competitors accepted plaques national anthems played ac companied raising countrys flag very emotional event awards banquet held Saturday evening Quality Inn Ballroom excellent band playing background music dinner served After dinner team trophies presented Hungarians taking first place Peoples Republic China placing second Italy third social event allowed talk different modelers around world discuss different ideas sign autographs swap souvenirs loved summarize World Champion ships rather difficult made new friends renewed old acquaintances feel opportunity lifetime participate Speed modelers missed World Championships certainly missed great modeling events year Gene Hempel 301 N Yale Dr Gar land TX 75042 PS table giving CLWC Speed results published page 124 January 1985 issue MA Competitor Il/Bergstrom Continued page 70 soldered hold assembly place adjustable screw Allen head 4-40 bolt screws threaded alumi num back plate through another octago nal spacer keep bolt centered support cutout entire assembly simply glued W18 bellcrank mount made two pieces % sq maple engine mount stock routed U-shaped channel shown provides extremely strong mounting point strengthens center section An 8-32 bolt run tween two maple bearers bellcrank floats between two mounts help two nuts top bottom bellcrank itself made 125-in T2404 aluminum another modification found neces sary after first ship airplane employed Fox bellcrank tremendous pull aircraft ears bellcrank bent upwards resemble bulls horns effectively reduc ing spacing approximately 2 heavier bellcrank havent problem flap control horn stray little normal construction tech niques order allow myself free dom adjust overall throw system well flap-to-elevator ratio incidence elevator relation flap about later talk about trimming build flap horn will need two telescoping sizes octagonal brass tubing smallest inner diam eter / A-in music wire horns themselves 4-40 bolt adjustable screw mechanism Cut two identical lengths octagonal tubing telescoping section solder together Silver solder 1A-in music wire ends drill center section 4-40 bolt solder place use brass main body pro vides ability tweak flaps needed use doubled center section provides strength stiffness necessary maintain set ting flight Combine assembly Du-Bros Swivel Link Quik-Link assem bly have completely-adjustable control system will serve well making pushrods remember use hardened 2-56 screws Quik Link attachment point will notice flap has piece / ply inboard side mounting horn horn needs mounted because slight amount taper trailing edge would cause flaps bind horn located further out tapered trailing edge used attempt stop torsional wing twist happening hard cor ner due center pressure moving aft angle attack increased Use 156Model Aviation Fun Fly ompeuaon Model Ideal Sunday Flyer Excellent OS 61 PS ptionally slow land ing speed le enough 1st Aileron model easily framed less S hrse balsa raft plywood construction ed fuil size plans Engine45 61 Wingspan62 Length OA541/4 Wing Area850 sq WeightA 6 Lbs Wing Loading 15 $7/o ox Designed Bob Lame kit market sold satisfaction guarantee money back LIST PRICE 94 S 5995 Introductory price offor limited time Prepald Continental USA Texas Residents Add 5% Sales Tax Send Money Orders Cashiers Check Next Day Shipping Allow 2 Weeks personal checks clear Sorry no COD Curtis Model Aircraft 3002 M Canterbury Circle Sherman Texas 75090 AC 214-893-61354 QfiYELAND GIANTS OR GIANT SCALE BUFFS Worlds Largest Gas Plans AssortneOt ___INTERNATIONALLY FAMOUS CD QUAUTh U MASTER MODELS PLANS 5D13ennoieIIe 21 $49 7CoooI Cot PBY5A $42 72 Cor 0351/4 [tO $4 104 Con Cot PBYSA $56 62 Honcord too Ike $43 96 Wriglrl-Novytoce $48 77 Boeing B-hG Port 835 52 W-Wnrcl3l Bed L $36 103 Boo t17G Fort $55 77WWnrI3l ted L $40 68 Doog 0-46A Ob $32 84 Pobber 07 FIr $39 108 Sibor 338 AropIr $49 6$ Hoenord P1 too $32 60 Boo 10Q Sport$36 70 Boylo Geo-Boe $33 90 Boo lOOSpori$49r 60 Sopeecoorin S6B $34 9SStinALow Wing$56 -89 Sopornoorino S6B $32 tO Mottle 74 T4M1$29 62 Cod Hocob P69 $40 7$ 8-Pgo 0400 tomb $42 94 CorHwb 965 FIr $54 10481-Pg 0400 Born $56 62 Egobbeod Vogo $24 65 MClrno Clipp. $55 74 Doolittlo G-B 11 $4t 97 MCbino Clippen $75 95 Monoooopo Sponl $36 68 We,I Whirincind $33 Boll Spo Bolidog $43 68 Byon Nonion $39 107 Aeronco C-3 Spt 835r 60 tBononeo VToil $39 Docmgloe 038 Obe $33 77 Looonrbo Sodon $25 132 Doogloc 038Ob$49 73 N Mitch Bomb $49 94 Pog. Cort toner $45 65 MMorocmdnr t26 049 71 Moclin 510 Bomb $39 81 08 Moqoito tb $43 * 73 Torn WW Bo 83510838 AKonqoBonrb $55 $42 POSloor PTl7Koydot 556 99 NBIk Widomo P61 $69 048ev Cornet Ron $24 71 Doog DC-3 Tron $32 Bonn MrMolligon $35 95 Doog DC3 Tron $55 mo 94 BOon Mr Molligon $45 06 Bomoke Toonon 13 $32 63 Boeing P-36A itr $36 105 Cor5201/4 L&S $55 84 Bong P-36A Pt $48 60 DongI0 M2 Med $24 teed C17t Srog $38 39 BrornotoceMeLA $54 - . ecIr C17B Slog $49r l07Gorn Bnorct POP $54 23 Lonk 11 Eleotro$3073 Tronol Air 6000$34 82 Lock 11 Binctrn840107 Mort Ms-I Borrr$44 62 Slinnon W SB$1691 Lindberg NX-21 1039 81 Stinnon 01W SB$3408 PoirclrPT19 Tr$59 nT122 Stmneon T/W SB $38 90 Woco Toper-Wing $3959 trretol Pt 92t $30 75 WenrId Lynonder $33 78 Orretol Ptr P3-B $32 100 WoetId Lynonder $49 110 Bristol P1 P2-B $45 57 Pord Triert 4-AT 02$ 74 T L Peeco Spen $45 76 Pord Triret 4-AT $45 lryroclcet XP5P-1 $30 114 Ford Trinrrr 4-AT $59 Co Wolrb P40 034 84 Sen-Joyce XPJ-2 $56 78 Loom glmtng P-3B $38 93 loening C-2Arrrplr $69 56 Rep Sco-Bee Arn 874 S8Gronr.12-P Dock $29 74 top SeoB Anrph 839 78 GronrJ3-P Dod $56 106 Pp J-3 Cob $39T 59 Gotho G1V Born $22 90 Lock Hodnon Brnb $20 117 Gotlmo G-1V Born $39 63 G orn P6P Hellcor 028 68 Oron-Winkle Bird $45 02 Tiger Icrorh 039 54 Ccr-r Smifr 5P934 $20 ~o\t4o Sod Tho SoolerPrices nobjeor ro clronge o 1200 Orhern 6- 7S Porrs Inni SOc Up Add 10% oil order dripping & in, etc. OSA Con & Olnecohore irs 15% 135% nir Pc o o combo 5200 inclode Price [icr Price icr fnoc non 010010 nir foreign odd $100 0$ CLEVELAND MODEL & SUPPLY Co 103070 DOTBOPT AVE CLEVELAND OHIO 44182 5NmS,cnm030,n 01030cm 120l5S0000 taper allows run spar per- type construction top pendicular fuselage Consequently block becomes merely cosmeticwith because center pressure runs exception area between Fl F2 parallel spar tendency twist area relieve balsa enough increase angle attack give adequate clearance bottom reduced engine necessary retain Dont forget add adjustable tip rigidity necessary front end weight box outboard tip prior handle torque put out ST 60 covering can use favorite method make balsa Lite Ply Stab elevator construction stab elevator bit unusual provides strong straight fairly lightweight structure First cut outline two units out lightweight A2 balsa glue half ribs A-in balsa main spar Sheet /16 balsa add leading edge Sand compo nents shape add hinges Lite Ply elevator horns Its rather simple Fuselage nothing unusual about construction fuselage some things need aware order build strong light Use medium balsa sides pre ferably 48-in stock strength difference between light medium bal sa tremendous weight differ ence negligible Dont forget add /16 sq balsa longerons top bot tom sides will add tremen dously shear strength stop fuselage twist sert cross-grained sheeting between fuselage sides will fit top fuselage formers addition hollowing bottom block first mark location formers block hollow between marks will tie bottom block order make very strong box out fuselage will surprised rigidity along entire length fuselage Fuel tank use square effi cient shape allows get fuel area have available have tried tapered shape previously get necessary fuel capacity about 7Y4 oz go between bearers fuel tank requirement taper angle required approximately ex tra 1 oz fuel carried engine would quit four-leaf clover because perform cutoff loop end flight pre vent overrun square shape might seem odd some might wonder per forms Ill tell will never go through hassle building another tapered tank absolutely no problem way fuel feeds biggest plus can construct tank about half time takes make tapered Another difference run fuel feed out inboard side tank can put needle valve side opposite muffler reason hate burned cut fingers resulting trying reach between rotating prop hot muffler have experienced no problem fuel feed due centrifugal force distance fuel travel short Because limited space tank compartment didnt have room typical J-bolt/rubberband hold-down arrangement adjusting tank Therefore simply run bolt through center tank blind nut mounted fuel compartment floor retain tank Landing gear Construction /-in music wire chose 2A-in Williams Bros Golden Age Wheels lightness using wheels make sure bush axle brass tubing dont wheels will last very long landing gear position shown pri marily hard-surfaced flying sites intend fly grass circle move gear forward about / Finishing Until can finish aircraft am really pleased com pared gorgeous beauties have seen will pretend expert area However no matter what method choose finishing Competitor II keep light Flying trimming found best combination nice stable flight speed 70-ft lines trued-up Zinger 13-6 propeller engine run ning rich four-cycle about 5500 rpm gives 54-sec laps very com fortable pattern final trim really no such thing final trim about / oz tip weight CG actually tp rear shown plans makes airplane extremely sensi tive would recommend start trimming process CG forward location As get used airplane slowly move CG aft until get kind turn want aircraft will tolerate such rearward CG because airfoiled stab actually lifts rear therefore combination aerodynamic forces wing stab combine total force well rear such rearward CG turn radius shortened considerably because lifting stab track landing characteristics airplane suffer trimming line tension remember work power end February 1985157 equation some tip weight achieve right results lead-out location Moving lead-out vain attempt manufacture line tension will cause problems appear caused something else Instead use largest prop will cause adverse yawing effect add tip weight just until outboard wing begins drop hard corner will close optimum setup best line ten sion aircraft still seems want come something wrong airframe should take home look warps twists time should touch lead-out location trimming line tension certain part maneuver such tops round loops will also need adjust lead-outs slightly shift CO mentioned before adjustable control system Now will give some tips use total throw system can adjusted flier com fort throughout maneuvers ie much actual throw use wrist myself have very little total movement up down therefore need fairly short moment arm flap control horn use four-inch bellcrank still gives leverage need wind operate control system ad dition being able change relation ship elevator flap can help solve tracking problem final trim V ended up very small amount down-elevator adjusted system made outside loops corners tighter inside adjusted inconsistency through handle until turn radius identical could write entire article trimming will leave recognized accomplished experts fieldmany have helped lot As matter fact trimming theories just presented originated Paul Walker never fully satisfied trim airplane Cardinal rules trimming though never change thing time always know started can go back last trim change did produce desired results am always trying some miniscule change just see what improvement can make flying characteristics aircraft Besides get lot practice flights way Remember want win Preci sion Aerobatics will have totally dedicate yourself end have good-flying aircraft will perform way want practice practice practice hope have same success aircraft have questions comments can contact home Pete Bergstrom 110 192nd Ct E Spanaway WA 98387 phone 206 847-3088 k Stamps 32 Page Tabloid size illustrated DISCOUNT Catalog Sent 1st Class Mail COMET- COX FLYLINE FOX GOLDBERG GUILLOWS JETCO K&3- PACTRA PECK POLYMER PERFECT SIG- STERLING SULLIVAN TOP FLITE & OTHERS PENN VILLEY HOllY CENTER Kim St Lan 19446 Niouport/Berliner Continued page 74 ventional pair I-struts very nimble little biplane suffered serious unreliability its Gnome Monosoupage engine Almost Nieuport 28s saw combat American squadrons French British preferred better-performing SPADs Sopwiths thats really another story entirely get better picture military airplanes true worth often pays listen what its opponents have say case Germans captured quite few versions Nieuport sesquiplane descriptions appeared wartime German aviation magazines course must keep mind requirements security morale can result intentionallydistorted picture being given Two articles translated pub lished British magazine Flight summer 1917 words reflect German opinion during war someones peacetime reflections Flugsport French aeroplanes Nieuport has important fighting machines Before advent modern SPAD machine sought after pilots Zeitschrjft fur Flugtechnic und c ikciA FUSROLASS & FOAN CONSTRUCTION FAI & AMA PArFERN 60.61 ENGINE M4 SPAN 704 sq AREA WEIGNT7 TO 8 LaS DEPENDING ON EQUIP BASIC KIT610795 DELUXE KIT$15995 ci AU U Man4& LSL MODEL PRODUCTS INQUIRIES INVITED813 388312 Dealers ributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELS KEB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIRING CUPS K4F 158Model Aviation 40 Wing Par 16 25 Engines
Edition: Model Aviation - 1985/02
Page Numbers: 68, 69, 70, 156, 157, 158
THIS IS THE SAGA years efforts Stunt competition outcome adventure has superior-flying air craft has will continue competitive levels Precision Aerobatics competition Competitor II turns well tracks better ST 60 nose has enough power complete pattern winds up 20 mph might question use word saga beginning article after reading illustrious introduction word chosen after run bad luck poor engineering led build ing three models five months first lost due folded wing effort build really light foolish use A-in spruce spars wing also failed locate ner ribs conjunction fuselage sides effect asking two small pieces spruce some /6-in contest balsa carry load entire wing An amateur should have seen problem coming needed hit head didnt take too long got about 30 flights airplane second airplane fell prey stooge cruel sense humor airplane beefed-up wing structure shown accompanying plans excellent flier achieved first-ever Expert win over 500 flights out practicing three weeks prior 1984 Nationals alone always-faithful stooge stooge thought might enjoy watching outside circle airplane flew Needless say dumbfounded Nats airplane took skies itself flew almost mile before plummeting ground resound ing crunch 68Model Aviation Top Picture Yourauthor/designer hiswayto second-place conteatfinish Com petitor II didnt say judging picture wed say performs well grass circle Above ship rather large designed all-out Precision Aerobatics competition 825 sq wing provides lift Supertigre 60 engine pro vides right power forthe 58-oz beautyto Precision Aerobatics pattern ease Youd think advanced state Control Line Precision Aerobatics models designs would fit mold tunately still folks attemp ting improve breed including author lightly-loaded model 60 engine Pete Bergstrom Up point season busy working various projects including article did have backup plane built three weeks away first Nationals com petition didnt have airplane fly quickly cleared workbench enlisted aid some friends Construc tion began flew model first time just three days before departing Reno finally finished trim appearance work night before leaving put two days hard practicing Reno Sunday Monday found out unneces sarily spooked high density alti tude went out again Monday night practice second flight night elevator pushrod failed metal fatigue after first loop four-leaf clover foolishly used brass quik-link connector heat soldering music wire pushrod softened brass build Competitor II use hardened steel link dont take chances Design theory some definite goals sat down last fall come up new airplane following year wanted airplane would turn blind ing corners track well penetrate give line tension wind could possibly need order solve problem blind ing turn went what thought would significant contribution extremely light wing loading first airplane weighed 49 oz giving wing loading 85 oz/sq ft lighter loading average competi tion Sailplane has airplane would surely turn sacrificed structural integrity light weight building phase wing didnt hold up next airplane weighed 57 oz due partially beefed-up wing ly rushed building job un necessary weight removed lacked suitable contest balsa gave wing loading 101 oz/sq ft provid ed very acceptable turn giving ship sufficient structural integ rity stooge let go put approximately 175 flights airplane six weeks order airplane track well left nose fairly long take advantage stabilizing effect propeller conjunction good-sized tail moment provides dampening effect center gravity CG locat ed well rear shown plans long tail moment provides enough force turn airplane extremely well prefer fly airplanes CG well rear almost point being tail-heavy order get maneuverability out nice stable forward-located CG great sport flier racer anything else expected maintain level flight through out entire circle ask airplane perform violent set maneuvers albeit beautiful such Precision Aerobatics pattern rearward CG will optimize aerodynamic proper ties aircraft make performing pattern much easier pilot theory good wind penetration simple overpower model could February 198569 Stunters today offering appearance jet aircraft Competitor Ils side view reminiscent full-size aerobatics plane provides welcome relief Upside-down isnt normal way start Supertigre 60 contest jitters dont get em helped cause flooded engine Bergstrom right others unidentified have sharpened leading edge would have degraded turning ability created early stall point fore opted go thick wing sec tion blunt nose allow airplane perform expectations simply put enough horsepower bully way through overhead figures pattern wind ST 60 chosen because brute horsepower 05 Max 45 has horsepower ST 60 rather because has usable power torque speed Stunt fliers like run engines size Competitor II allows run 13-in props associated yaw problems common large pro pellersand calm conditions 14-in props well does wonders line tension well turning usable power wind penetration subject line ten sion will notice have cluded movable rudder plane nor rudder offset time feel need either features build crooked fuselage straight fuselage rudder trim adds unwanted yawing motion makes difficulty trimming model phases flight Cowl design provides adequate cooling line tension comes engine power True adjusting lead-outs can provide some tension certain parts pattern cannot man ufacture line tension method same light can add pounds tip weight improve tension top will able avoid dropping wing good hard corner Its simple dont have line tension basic airframe/power plant combination will never manufacture will always have settle compromised situation best Construction Although airplane difficult build designed beginner Rather designed expert flier wants edge competition advanced flier looking move expert ranks Therefore am going clude blow-by-blow description construction rather Ill highlight im portant points Wing wing basic D-tube construc tion landing gear blocks secured 1A ply doublers W4 W6 lead-out guide constructed aluminum brass support piece X6-in aluminum cutout center slider movement individ ual guides constructed X6-in aluminum back plate brass eyelet wire pass through piece oc tagonal brass tubing spacer run cutout support piece washer slid over eyelet Continued page 156 70Model Aviation Hatch behind canopy provides access adjustable control system helps make flight trimming easier Total throw system can adjusted max pilot comfort Engine compartment clean uncluttered single hold-down boitforthe tank provkies ease adjustment muffler SST Specialty Products weighs mere 10 grams CL Speed/Hem pel Continued page 153 155mm pitch 61 secondbest flight placed Otello Vitre Italy 1638 mph 26370 kph using new OPS 25cc engines engines exhibited very good potential fast FAI Speed engines Italian models mounted sideways utilized single-blade prop design lao Guojun third-best flight day speed 1637 mph 2635 kph Friday September 21 last ficial flying day F2A Speed Hun garians really turned three best flights day capture World Speed Championship trophy second time fastest time day earned JozsefMolnar second place 1735 mph 2792 kph Sandor Szegedi time 1734 mph 2790 kph however Thursday flight 2801 kph good first place Jozsef Mult placed third speed 1727 mph 2779 kph Hungarian Speed team mem bers used Rossi engine handcarved single-blade props models utilized longest wingswhich made venetian blind slats really worked quite well just marked pattern desired aluminum slat sheared off excess upper lower halves glued together hardwood spar through center sup port rigidity wingspan models ranged 48 55 carrying cases models con structed meticulouslyjust like mod els themselves Saturday September 22 day everyone waiting momentous event winning competitors accepted plaques national anthems played ac companied raising countrys flag very emotional event awards banquet held Saturday evening Quality Inn Ballroom excellent band playing background music dinner served After dinner team trophies presented Hungarians taking first place Peoples Republic China placing second Italy third social event allowed talk different modelers around world discuss different ideas sign autographs swap souvenirs loved summarize World Champion ships rather difficult made new friends renewed old acquaintances feel opportunity lifetime participate Speed modelers missed World Championships certainly missed great modeling events year Gene Hempel 301 N Yale Dr Gar land TX 75042 PS table giving CLWC Speed results published page 124 January 1985 issue MA Competitor Il/Bergstrom Continued page 70 soldered hold assembly place adjustable screw Allen head 4-40 bolt screws threaded alumi num back plate through another octago nal spacer keep bolt centered support cutout entire assembly simply glued W18 bellcrank mount made two pieces % sq maple engine mount stock routed U-shaped channel shown provides extremely strong mounting point strengthens center section An 8-32 bolt run tween two maple bearers bellcrank floats between two mounts help two nuts top bottom bellcrank itself made 125-in T2404 aluminum another modification found neces sary after first ship airplane employed Fox bellcrank tremendous pull aircraft ears bellcrank bent upwards resemble bulls horns effectively reduc ing spacing approximately 2 heavier bellcrank havent problem flap control horn stray little normal construction tech niques order allow myself free dom adjust overall throw system well flap-to-elevator ratio incidence elevator relation flap about later talk about trimming build flap horn will need two telescoping sizes octagonal brass tubing smallest inner diam eter / A-in music wire horns themselves 4-40 bolt adjustable screw mechanism Cut two identical lengths octagonal tubing telescoping section solder together Silver solder 1A-in music wire ends drill center section 4-40 bolt solder place use brass main body pro vides ability tweak flaps needed use doubled center section provides strength stiffness necessary maintain set ting flight Combine assembly Du-Bros Swivel Link Quik-Link assem bly have completely-adjustable control system will serve well making pushrods remember use hardened 2-56 screws Quik Link attachment point will notice flap has piece / ply inboard side mounting horn horn needs mounted because slight amount taper trailing edge would cause flaps bind horn located further out tapered trailing edge used attempt stop torsional wing twist happening hard cor ner due center pressure moving aft angle attack increased Use 156Model Aviation Fun Fly ompeuaon Model Ideal Sunday Flyer Excellent OS 61 PS ptionally slow land ing speed le enough 1st Aileron model easily framed less S hrse balsa raft plywood construction ed fuil size plans Engine45 61 Wingspan62 Length OA541/4 Wing Area850 sq WeightA 6 Lbs Wing Loading 15 $7/o ox Designed Bob Lame kit market sold satisfaction guarantee money back LIST PRICE 94 S 5995 Introductory price offor limited time Prepald Continental USA Texas Residents Add 5% Sales Tax Send Money Orders Cashiers Check Next Day Shipping Allow 2 Weeks personal checks clear Sorry no COD Curtis Model Aircraft 3002 M Canterbury Circle Sherman Texas 75090 AC 214-893-61354 QfiYELAND GIANTS OR GIANT SCALE BUFFS Worlds Largest Gas Plans AssortneOt ___INTERNATIONALLY FAMOUS CD QUAUTh U MASTER MODELS PLANS 5D13ennoieIIe 21 $49 7CoooI Cot PBY5A $42 72 Cor 0351/4 [tO $4 104 Con Cot PBYSA $56 62 Honcord too Ike $43 96 Wriglrl-Novytoce $48 77 Boeing B-hG Port 835 52 W-Wnrcl3l Bed L $36 103 Boo t17G Fort $55 77WWnrI3l ted L $40 68 Doog 0-46A Ob $32 84 Pobber 07 FIr $39 108 Sibor 338 AropIr $49 6$ Hoenord P1 too $32 60 Boo 10Q Sport$36 70 Boylo Geo-Boe $33 90 Boo lOOSpori$49r 60 Sopeecoorin S6B $34 9SStinALow Wing$56 -89 Sopornoorino S6B $32 tO Mottle 74 T4M1$29 62 Cod Hocob P69 $40 7$ 8-Pgo 0400 tomb $42 94 CorHwb 965 FIr $54 10481-Pg 0400 Born $56 62 Egobbeod Vogo $24 65 MClrno Clipp. $55 74 Doolittlo G-B 11 $4t 97 MCbino Clippen $75 95 Monoooopo Sponl $36 68 We,I Whirincind $33 Boll Spo Bolidog $43 68 Byon Nonion $39 107 Aeronco C-3 Spt 835r 60 tBononeo VToil $39 Docmgloe 038 Obe $33 77 Looonrbo Sodon $25 132 Doogloc 038Ob$49 73 N Mitch Bomb $49 94 Pog. Cort toner $45 65 MMorocmdnr t26 049 71 Moclin 510 Bomb $39 81 08 Moqoito tb $43 * 73 Torn WW Bo 83510838 AKonqoBonrb $55 $42 POSloor PTl7Koydot 556 99 NBIk Widomo P61 $69 048ev Cornet Ron $24 71 Doog DC-3 Tron $32 Bonn MrMolligon $35 95 Doog DC3 Tron $55 mo 94 BOon Mr Molligon $45 06 Bomoke Toonon 13 $32 63 Boeing P-36A itr $36 105 Cor5201/4 L&S $55 84 Bong P-36A Pt $48 60 DongI0 M2 Med $24 teed C17t Srog $38 39 BrornotoceMeLA $54 - . ecIr C17B Slog $49r l07Gorn Bnorct POP $54 23 Lonk 11 Eleotro$3073 Tronol Air 6000$34 82 Lock 11 Binctrn840107 Mort Ms-I Borrr$44 62 Slinnon W SB$1691 Lindberg NX-21 1039 81 Stinnon 01W SB$3408 PoirclrPT19 Tr$59 nT122 Stmneon T/W SB $38 90 Woco Toper-Wing $3959 trretol Pt 92t $30 75 WenrId Lynonder $33 78 Orretol Ptr P3-B $32 100 WoetId Lynonder $49 110 Bristol P1 P2-B $45 57 Pord Triert 4-AT 02$ 74 T L Peeco Spen $45 76 Pord Triret 4-AT $45 lryroclcet XP5P-1 $30 114 Ford Trinrrr 4-AT $59 Co Wolrb P40 034 84 Sen-Joyce XPJ-2 $56 78 Loom glmtng P-3B $38 93 loening C-2Arrrplr $69 56 Rep Sco-Bee Arn 874 S8Gronr.12-P Dock $29 74 top SeoB Anrph 839 78 GronrJ3-P Dod $56 106 Pp J-3 Cob $39T 59 Gotho G1V Born $22 90 Lock Hodnon Brnb $20 117 Gotlmo G-1V Born $39 63 G orn P6P Hellcor 028 68 Oron-Winkle Bird $45 02 Tiger Icrorh 039 54 Ccr-r Smifr 5P934 $20 ~o\t4o Sod Tho SoolerPrices nobjeor ro clronge o 1200 Orhern 6- 7S Porrs Inni SOc Up Add 10% oil order dripping & in, etc. OSA Con & Olnecohore irs 15% 135% nir Pc o o combo 5200 inclode Price [icr Price icr fnoc non 010010 nir foreign odd $100 0$ CLEVELAND MODEL & SUPPLY Co 103070 DOTBOPT AVE CLEVELAND OHIO 44182 5NmS,cnm030,n 01030cm 120l5S0000 taper allows run spar per- type construction top pendicular fuselage Consequently block becomes merely cosmeticwith because center pressure runs exception area between Fl F2 parallel spar tendency twist area relieve balsa enough increase angle attack give adequate clearance bottom reduced engine necessary retain Dont forget add adjustable tip rigidity necessary front end weight box outboard tip prior handle torque put out ST 60 covering can use favorite method make balsa Lite Ply Stab elevator construction stab elevator bit unusual provides strong straight fairly lightweight structure First cut outline two units out lightweight A2 balsa glue half ribs A-in balsa main spar Sheet /16 balsa add leading edge Sand compo nents shape add hinges Lite Ply elevator horns Its rather simple Fuselage nothing unusual about construction fuselage some things need aware order build strong light Use medium balsa sides pre ferably 48-in stock strength difference between light medium bal sa tremendous weight differ ence negligible Dont forget add /16 sq balsa longerons top bot tom sides will add tremen dously shear strength stop fuselage twist sert cross-grained sheeting between fuselage sides will fit top fuselage formers addition hollowing bottom block first mark location formers block hollow between marks will tie bottom block order make very strong box out fuselage will surprised rigidity along entire length fuselage Fuel tank use square effi cient shape allows get fuel area have available have tried tapered shape previously get necessary fuel capacity about 7Y4 oz go between bearers fuel tank requirement taper angle required approximately ex tra 1 oz fuel carried engine would quit four-leaf clover because perform cutoff loop end flight pre vent overrun square shape might seem odd some might wonder per forms Ill tell will never go through hassle building another tapered tank absolutely no problem way fuel feeds biggest plus can construct tank about half time takes make tapered Another difference run fuel feed out inboard side tank can put needle valve side opposite muffler reason hate burned cut fingers resulting trying reach between rotating prop hot muffler have experienced no problem fuel feed due centrifugal force distance fuel travel short Because limited space tank compartment didnt have room typical J-bolt/rubberband hold-down arrangement adjusting tank Therefore simply run bolt through center tank blind nut mounted fuel compartment floor retain tank Landing gear Construction /-in music wire chose 2A-in Williams Bros Golden Age Wheels lightness using wheels make sure bush axle brass tubing dont wheels will last very long landing gear position shown pri marily hard-surfaced flying sites intend fly grass circle move gear forward about / Finishing Until can finish aircraft am really pleased com pared gorgeous beauties have seen will pretend expert area However no matter what method choose finishing Competitor II keep light Flying trimming found best combination nice stable flight speed 70-ft lines trued-up Zinger 13-6 propeller engine run ning rich four-cycle about 5500 rpm gives 54-sec laps very com fortable pattern final trim really no such thing final trim about / oz tip weight CG actually tp rear shown plans makes airplane extremely sensi tive would recommend start trimming process CG forward location As get used airplane slowly move CG aft until get kind turn want aircraft will tolerate such rearward CG because airfoiled stab actually lifts rear therefore combination aerodynamic forces wing stab combine total force well rear such rearward CG turn radius shortened considerably because lifting stab track landing characteristics airplane suffer trimming line tension remember work power end February 1985157 equation some tip weight achieve right results lead-out location Moving lead-out vain attempt manufacture line tension will cause problems appear caused something else Instead use largest prop will cause adverse yawing effect add tip weight just until outboard wing begins drop hard corner will close optimum setup best line ten sion aircraft still seems want come something wrong airframe should take home look warps twists time should touch lead-out location trimming line tension certain part maneuver such tops round loops will also need adjust lead-outs slightly shift CO mentioned before adjustable control system Now will give some tips use total throw system can adjusted flier com fort throughout maneuvers ie much actual throw use wrist myself have very little total movement up down therefore need fairly short moment arm flap control horn use four-inch bellcrank still gives leverage need wind operate control system ad dition being able change relation ship elevator flap can help solve tracking problem final trim V ended up very small amount down-elevator adjusted system made outside loops corners tighter inside adjusted inconsistency through handle until turn radius identical could write entire article trimming will leave recognized accomplished experts fieldmany have helped lot As matter fact trimming theories just presented originated Paul Walker never fully satisfied trim airplane Cardinal rules trimming though never change thing time always know started can go back last trim change did produce desired results am always trying some miniscule change just see what improvement can make flying characteristics aircraft Besides get lot practice flights way Remember want win Preci sion Aerobatics will have totally dedicate yourself end have good-flying aircraft will perform way want practice practice practice hope have same success aircraft have questions comments can contact home Pete Bergstrom 110 192nd Ct E Spanaway WA 98387 phone 206 847-3088 k Stamps 32 Page Tabloid size illustrated DISCOUNT Catalog Sent 1st Class Mail COMET- COX FLYLINE FOX GOLDBERG GUILLOWS JETCO K&3- PACTRA PECK POLYMER PERFECT SIG- STERLING SULLIVAN TOP FLITE & OTHERS PENN VILLEY HOllY CENTER Kim St Lan 19446 Niouport/Berliner Continued page 74 ventional pair I-struts very nimble little biplane suffered serious unreliability its Gnome Monosoupage engine Almost Nieuport 28s saw combat American squadrons French British preferred better-performing SPADs Sopwiths thats really another story entirely get better picture military airplanes true worth often pays listen what its opponents have say case Germans captured quite few versions Nieuport sesquiplane descriptions appeared wartime German aviation magazines course must keep mind requirements security morale can result intentionallydistorted picture being given Two articles translated pub lished British magazine Flight summer 1917 words reflect German opinion during war someones peacetime reflections Flugsport French aeroplanes Nieuport has important fighting machines Before advent modern SPAD machine sought after pilots Zeitschrjft fur Flugtechnic und c ikciA FUSROLASS & FOAN CONSTRUCTION FAI & AMA PArFERN 60.61 ENGINE M4 SPAN 704 sq AREA WEIGNT7 TO 8 LaS DEPENDING ON EQUIP BASIC KIT610795 DELUXE KIT$15995 ci AU U Man4& LSL MODEL PRODUCTS INQUIRIES INVITED813 388312 Dealers ributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELS KEB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIRING CUPS K4F 158Model Aviation 40 Wing Par 16 25 Engines
Edition: Model Aviation - 1985/02
Page Numbers: 68, 69, 70, 156, 157, 158
THIS IS THE SAGA years efforts Stunt competition outcome adventure has superior-flying air craft has will continue competitive levels Precision Aerobatics competition Competitor II turns well tracks better ST 60 nose has enough power complete pattern winds up 20 mph might question use word saga beginning article after reading illustrious introduction word chosen after run bad luck poor engineering led build ing three models five months first lost due folded wing effort build really light foolish use A-in spruce spars wing also failed locate ner ribs conjunction fuselage sides effect asking two small pieces spruce some /6-in contest balsa carry load entire wing An amateur should have seen problem coming needed hit head didnt take too long got about 30 flights airplane second airplane fell prey stooge cruel sense humor airplane beefed-up wing structure shown accompanying plans excellent flier achieved first-ever Expert win over 500 flights out practicing three weeks prior 1984 Nationals alone always-faithful stooge stooge thought might enjoy watching outside circle airplane flew Needless say dumbfounded Nats airplane took skies itself flew almost mile before plummeting ground resound ing crunch 68Model Aviation Top Picture Yourauthor/designer hiswayto second-place conteatfinish Com petitor II didnt say judging picture wed say performs well grass circle Above ship rather large designed all-out Precision Aerobatics competition 825 sq wing provides lift Supertigre 60 engine pro vides right power forthe 58-oz beautyto Precision Aerobatics pattern ease Youd think advanced state Control Line Precision Aerobatics models designs would fit mold tunately still folks attemp ting improve breed including author lightly-loaded model 60 engine Pete Bergstrom Up point season busy working various projects including article did have backup plane built three weeks away first Nationals com petition didnt have airplane fly quickly cleared workbench enlisted aid some friends Construc tion began flew model first time just three days before departing Reno finally finished trim appearance work night before leaving put two days hard practicing Reno Sunday Monday found out unneces sarily spooked high density alti tude went out again Monday night practice second flight night elevator pushrod failed metal fatigue after first loop four-leaf clover foolishly used brass quik-link connector heat soldering music wire pushrod softened brass build Competitor II use hardened steel link dont take chances Design theory some definite goals sat down last fall come up new airplane following year wanted airplane would turn blind ing corners track well penetrate give line tension wind could possibly need order solve problem blind ing turn went what thought would significant contribution extremely light wing loading first airplane weighed 49 oz giving wing loading 85 oz/sq ft lighter loading average competi tion Sailplane has airplane would surely turn sacrificed structural integrity light weight building phase wing didnt hold up next airplane weighed 57 oz due partially beefed-up wing ly rushed building job un necessary weight removed lacked suitable contest balsa gave wing loading 101 oz/sq ft provid ed very acceptable turn giving ship sufficient structural integ rity stooge let go put approximately 175 flights airplane six weeks order airplane track well left nose fairly long take advantage stabilizing effect propeller conjunction good-sized tail moment provides dampening effect center gravity CG locat ed well rear shown plans long tail moment provides enough force turn airplane extremely well prefer fly airplanes CG well rear almost point being tail-heavy order get maneuverability out nice stable forward-located CG great sport flier racer anything else expected maintain level flight through out entire circle ask airplane perform violent set maneuvers albeit beautiful such Precision Aerobatics pattern rearward CG will optimize aerodynamic proper ties aircraft make performing pattern much easier pilot theory good wind penetration simple overpower model could February 198569 Stunters today offering appearance jet aircraft Competitor Ils side view reminiscent full-size aerobatics plane provides welcome relief Upside-down isnt normal way start Supertigre 60 contest jitters dont get em helped cause flooded engine Bergstrom right others unidentified have sharpened leading edge would have degraded turning ability created early stall point fore opted go thick wing sec tion blunt nose allow airplane perform expectations simply put enough horsepower bully way through overhead figures pattern wind ST 60 chosen because brute horsepower 05 Max 45 has horsepower ST 60 rather because has usable power torque speed Stunt fliers like run engines size Competitor II allows run 13-in props associated yaw problems common large pro pellersand calm conditions 14-in props well does wonders line tension well turning usable power wind penetration subject line ten sion will notice have cluded movable rudder plane nor rudder offset time feel need either features build crooked fuselage straight fuselage rudder trim adds unwanted yawing motion makes difficulty trimming model phases flight Cowl design provides adequate cooling line tension comes engine power True adjusting lead-outs can provide some tension certain parts pattern cannot man ufacture line tension method same light can add pounds tip weight improve tension top will able avoid dropping wing good hard corner Its simple dont have line tension basic airframe/power plant combination will never manufacture will always have settle compromised situation best Construction Although airplane difficult build designed beginner Rather designed expert flier wants edge competition advanced flier looking move expert ranks Therefore am going clude blow-by-blow description construction rather Ill highlight im portant points Wing wing basic D-tube construc tion landing gear blocks secured 1A ply doublers W4 W6 lead-out guide constructed aluminum brass support piece X6-in aluminum cutout center slider movement individ ual guides constructed X6-in aluminum back plate brass eyelet wire pass through piece oc tagonal brass tubing spacer run cutout support piece washer slid over eyelet Continued page 156 70Model Aviation Hatch behind canopy provides access adjustable control system helps make flight trimming easier Total throw system can adjusted max pilot comfort Engine compartment clean uncluttered single hold-down boitforthe tank provkies ease adjustment muffler SST Specialty Products weighs mere 10 grams CL Speed/Hem pel Continued page 153 155mm pitch 61 secondbest flight placed Otello Vitre Italy 1638 mph 26370 kph using new OPS 25cc engines engines exhibited very good potential fast FAI Speed engines Italian models mounted sideways utilized single-blade prop design lao Guojun third-best flight day speed 1637 mph 2635 kph Friday September 21 last ficial flying day F2A Speed Hun garians really turned three best flights day capture World Speed Championship trophy second time fastest time day earned JozsefMolnar second place 1735 mph 2792 kph Sandor Szegedi time 1734 mph 2790 kph however Thursday flight 2801 kph good first place Jozsef Mult placed third speed 1727 mph 2779 kph Hungarian Speed team mem bers used Rossi engine handcarved single-blade props models utilized longest wingswhich made venetian blind slats really worked quite well just marked pattern desired aluminum slat sheared off excess upper lower halves glued together hardwood spar through center sup port rigidity wingspan models ranged 48 55 carrying cases models con structed meticulouslyjust like mod els themselves Saturday September 22 day everyone waiting momentous event winning competitors accepted plaques national anthems played ac companied raising countrys flag very emotional event awards banquet held Saturday evening Quality Inn Ballroom excellent band playing background music dinner served After dinner team trophies presented Hungarians taking first place Peoples Republic China placing second Italy third social event allowed talk different modelers around world discuss different ideas sign autographs swap souvenirs loved summarize World Champion ships rather difficult made new friends renewed old acquaintances feel opportunity lifetime participate Speed modelers missed World Championships certainly missed great modeling events year Gene Hempel 301 N Yale Dr Gar land TX 75042 PS table giving CLWC Speed results published page 124 January 1985 issue MA Competitor Il/Bergstrom Continued page 70 soldered hold assembly place adjustable screw Allen head 4-40 bolt screws threaded alumi num back plate through another octago nal spacer keep bolt centered support cutout entire assembly simply glued W18 bellcrank mount made two pieces % sq maple engine mount stock routed U-shaped channel shown provides extremely strong mounting point strengthens center section An 8-32 bolt run tween two maple bearers bellcrank floats between two mounts help two nuts top bottom bellcrank itself made 125-in T2404 aluminum another modification found neces sary after first ship airplane employed Fox bellcrank tremendous pull aircraft ears bellcrank bent upwards resemble bulls horns effectively reduc ing spacing approximately 2 heavier bellcrank havent problem flap control horn stray little normal construction tech niques order allow myself free dom adjust overall throw system well flap-to-elevator ratio incidence elevator relation flap about later talk about trimming build flap horn will need two telescoping sizes octagonal brass tubing smallest inner diam eter / A-in music wire horns themselves 4-40 bolt adjustable screw mechanism Cut two identical lengths octagonal tubing telescoping section solder together Silver solder 1A-in music wire ends drill center section 4-40 bolt solder place use brass main body pro vides ability tweak flaps needed use doubled center section provides strength stiffness necessary maintain set ting flight Combine assembly Du-Bros Swivel Link Quik-Link assem bly have completely-adjustable control system will serve well making pushrods remember use hardened 2-56 screws Quik Link attachment point will notice flap has piece / ply inboard side mounting horn horn needs mounted because slight amount taper trailing edge would cause flaps bind horn located further out tapered trailing edge used attempt stop torsional wing twist happening hard cor ner due center pressure moving aft angle attack increased Use 156Model Aviation Fun Fly ompeuaon Model Ideal Sunday Flyer Excellent OS 61 PS ptionally slow land ing speed le enough 1st Aileron model easily framed less S hrse balsa raft plywood construction ed fuil size plans Engine45 61 Wingspan62 Length OA541/4 Wing Area850 sq WeightA 6 Lbs Wing Loading 15 $7/o ox Designed Bob Lame kit market sold satisfaction guarantee money back LIST PRICE 94 S 5995 Introductory price offor limited time Prepald Continental USA Texas Residents Add 5% Sales Tax Send Money Orders Cashiers Check Next Day Shipping Allow 2 Weeks personal checks clear Sorry no COD Curtis Model Aircraft 3002 M Canterbury Circle Sherman Texas 75090 AC 214-893-61354 QfiYELAND GIANTS OR GIANT SCALE BUFFS Worlds Largest Gas Plans AssortneOt ___INTERNATIONALLY FAMOUS CD QUAUTh U MASTER MODELS PLANS 5D13ennoieIIe 21 $49 7CoooI Cot PBY5A $42 72 Cor 0351/4 [tO $4 104 Con Cot PBYSA $56 62 Honcord too Ike $43 96 Wriglrl-Novytoce $48 77 Boeing B-hG Port 835 52 W-Wnrcl3l Bed L $36 103 Boo t17G Fort $55 77WWnrI3l ted L $40 68 Doog 0-46A Ob $32 84 Pobber 07 FIr $39 108 Sibor 338 AropIr $49 6$ Hoenord P1 too $32 60 Boo 10Q Sport$36 70 Boylo Geo-Boe $33 90 Boo lOOSpori$49r 60 Sopeecoorin S6B $34 9SStinALow Wing$56 -89 Sopornoorino S6B $32 tO Mottle 74 T4M1$29 62 Cod Hocob P69 $40 7$ 8-Pgo 0400 tomb $42 94 CorHwb 965 FIr $54 10481-Pg 0400 Born $56 62 Egobbeod Vogo $24 65 MClrno Clipp. $55 74 Doolittlo G-B 11 $4t 97 MCbino Clippen $75 95 Monoooopo Sponl $36 68 We,I Whirincind $33 Boll Spo Bolidog $43 68 Byon Nonion $39 107 Aeronco C-3 Spt 835r 60 tBononeo VToil $39 Docmgloe 038 Obe $33 77 Looonrbo Sodon $25 132 Doogloc 038Ob$49 73 N Mitch Bomb $49 94 Pog. Cort toner $45 65 MMorocmdnr t26 049 71 Moclin 510 Bomb $39 81 08 Moqoito tb $43 * 73 Torn WW Bo 83510838 AKonqoBonrb $55 $42 POSloor PTl7Koydot 556 99 NBIk Widomo P61 $69 048ev Cornet Ron $24 71 Doog DC-3 Tron $32 Bonn MrMolligon $35 95 Doog DC3 Tron $55 mo 94 BOon Mr Molligon $45 06 Bomoke Toonon 13 $32 63 Boeing P-36A itr $36 105 Cor5201/4 L&S $55 84 Bong P-36A Pt $48 60 DongI0 M2 Med $24 teed C17t Srog $38 39 BrornotoceMeLA $54 - . ecIr C17B Slog $49r l07Gorn Bnorct POP $54 23 Lonk 11 Eleotro$3073 Tronol Air 6000$34 82 Lock 11 Binctrn840107 Mort Ms-I Borrr$44 62 Slinnon W SB$1691 Lindberg NX-21 1039 81 Stinnon 01W SB$3408 PoirclrPT19 Tr$59 nT122 Stmneon T/W SB $38 90 Woco Toper-Wing $3959 trretol Pt 92t $30 75 WenrId Lynonder $33 78 Orretol Ptr P3-B $32 100 WoetId Lynonder $49 110 Bristol P1 P2-B $45 57 Pord Triert 4-AT 02$ 74 T L Peeco Spen $45 76 Pord Triret 4-AT $45 lryroclcet XP5P-1 $30 114 Ford Trinrrr 4-AT $59 Co Wolrb P40 034 84 Sen-Joyce XPJ-2 $56 78 Loom glmtng P-3B $38 93 loening C-2Arrrplr $69 56 Rep Sco-Bee Arn 874 S8Gronr.12-P Dock $29 74 top SeoB Anrph 839 78 GronrJ3-P Dod $56 106 Pp J-3 Cob $39T 59 Gotho G1V Born $22 90 Lock Hodnon Brnb $20 117 Gotlmo G-1V Born $39 63 G orn P6P Hellcor 028 68 Oron-Winkle Bird $45 02 Tiger Icrorh 039 54 Ccr-r Smifr 5P934 $20 ~o\t4o Sod Tho SoolerPrices nobjeor ro clronge o 1200 Orhern 6- 7S Porrs Inni SOc Up Add 10% oil order dripping & in, etc. OSA Con & Olnecohore irs 15% 135% nir Pc o o combo 5200 inclode Price [icr Price icr fnoc non 010010 nir foreign odd $100 0$ CLEVELAND MODEL & SUPPLY Co 103070 DOTBOPT AVE CLEVELAND OHIO 44182 5NmS,cnm030,n 01030cm 120l5S0000 taper allows run spar per- type construction top pendicular fuselage Consequently block becomes merely cosmeticwith because center pressure runs exception area between Fl F2 parallel spar tendency twist area relieve balsa enough increase angle attack give adequate clearance bottom reduced engine necessary retain Dont forget add adjustable tip rigidity necessary front end weight box outboard tip prior handle torque put out ST 60 covering can use favorite method make balsa Lite Ply Stab elevator construction stab elevator bit unusual provides strong straight fairly lightweight structure First cut outline two units out lightweight A2 balsa glue half ribs A-in balsa main spar Sheet /16 balsa add leading edge Sand compo nents shape add hinges Lite Ply elevator horns Its rather simple Fuselage nothing unusual about construction fuselage some things need aware order build strong light Use medium balsa sides pre ferably 48-in stock strength difference between light medium bal sa tremendous weight differ ence negligible Dont forget add /16 sq balsa longerons top bot tom sides will add tremen dously shear strength stop fuselage twist sert cross-grained sheeting between fuselage sides will fit top fuselage formers addition hollowing bottom block first mark location formers block hollow between marks will tie bottom block order make very strong box out fuselage will surprised rigidity along entire length fuselage Fuel tank use square effi cient shape allows get fuel area have available have tried tapered shape previously get necessary fuel capacity about 7Y4 oz go between bearers fuel tank requirement taper angle required approximately ex tra 1 oz fuel carried engine would quit four-leaf clover because perform cutoff loop end flight pre vent overrun square shape might seem odd some might wonder per forms Ill tell will never go through hassle building another tapered tank absolutely no problem way fuel feeds biggest plus can construct tank about half time takes make tapered Another difference run fuel feed out inboard side tank can put needle valve side opposite muffler reason hate burned cut fingers resulting trying reach between rotating prop hot muffler have experienced no problem fuel feed due centrifugal force distance fuel travel short Because limited space tank compartment didnt have room typical J-bolt/rubberband hold-down arrangement adjusting tank Therefore simply run bolt through center tank blind nut mounted fuel compartment floor retain tank Landing gear Construction /-in music wire chose 2A-in Williams Bros Golden Age Wheels lightness using wheels make sure bush axle brass tubing dont wheels will last very long landing gear position shown pri marily hard-surfaced flying sites intend fly grass circle move gear forward about / Finishing Until can finish aircraft am really pleased com pared gorgeous beauties have seen will pretend expert area However no matter what method choose finishing Competitor II keep light Flying trimming found best combination nice stable flight speed 70-ft lines trued-up Zinger 13-6 propeller engine run ning rich four-cycle about 5500 rpm gives 54-sec laps very com fortable pattern final trim really no such thing final trim about / oz tip weight CG actually tp rear shown plans makes airplane extremely sensi tive would recommend start trimming process CG forward location As get used airplane slowly move CG aft until get kind turn want aircraft will tolerate such rearward CG because airfoiled stab actually lifts rear therefore combination aerodynamic forces wing stab combine total force well rear such rearward CG turn radius shortened considerably because lifting stab track landing characteristics airplane suffer trimming line tension remember work power end February 1985157 equation some tip weight achieve right results lead-out location Moving lead-out vain attempt manufacture line tension will cause problems appear caused something else Instead use largest prop will cause adverse yawing effect add tip weight just until outboard wing begins drop hard corner will close optimum setup best line ten sion aircraft still seems want come something wrong airframe should take home look warps twists time should touch lead-out location trimming line tension certain part maneuver such tops round loops will also need adjust lead-outs slightly shift CO mentioned before adjustable control system Now will give some tips use total throw system can adjusted flier com fort throughout maneuvers ie much actual throw use wrist myself have very little total movement up down therefore need fairly short moment arm flap control horn use four-inch bellcrank still gives leverage need wind operate control system ad dition being able change relation ship elevator flap can help solve tracking problem final trim V ended up very small amount down-elevator adjusted system made outside loops corners tighter inside adjusted inconsistency through handle until turn radius identical could write entire article trimming will leave recognized accomplished experts fieldmany have helped lot As matter fact trimming theories just presented originated Paul Walker never fully satisfied trim airplane Cardinal rules trimming though never change thing time always know started can go back last trim change did produce desired results am always trying some miniscule change just see what improvement can make flying characteristics aircraft Besides get lot practice flights way Remember want win Preci sion Aerobatics will have totally dedicate yourself end have good-flying aircraft will perform way want practice practice practice hope have same success aircraft have questions comments can contact home Pete Bergstrom 110 192nd Ct E Spanaway WA 98387 phone 206 847-3088 k Stamps 32 Page Tabloid size illustrated DISCOUNT Catalog Sent 1st Class Mail COMET- COX FLYLINE FOX GOLDBERG GUILLOWS JETCO K&3- PACTRA PECK POLYMER PERFECT SIG- STERLING SULLIVAN TOP FLITE & OTHERS PENN VILLEY HOllY CENTER Kim St Lan 19446 Niouport/Berliner Continued page 74 ventional pair I-struts very nimble little biplane suffered serious unreliability its Gnome Monosoupage engine Almost Nieuport 28s saw combat American squadrons French British preferred better-performing SPADs Sopwiths thats really another story entirely get better picture military airplanes true worth often pays listen what its opponents have say case Germans captured quite few versions Nieuport sesquiplane descriptions appeared wartime German aviation magazines course must keep mind requirements security morale can result intentionallydistorted picture being given Two articles translated pub lished British magazine Flight summer 1917 words reflect German opinion during war someones peacetime reflections Flugsport French aeroplanes Nieuport has important fighting machines Before advent modern SPAD machine sought after pilots Zeitschrjft fur Flugtechnic und c ikciA FUSROLASS & FOAN CONSTRUCTION FAI & AMA PArFERN 60.61 ENGINE M4 SPAN 704 sq AREA WEIGNT7 TO 8 LaS DEPENDING ON EQUIP BASIC KIT610795 DELUXE KIT$15995 ci AU U Man4& LSL MODEL PRODUCTS INQUIRIES INVITED813 388312 Dealers ributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELS KEB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIRING CUPS K4F 158Model Aviation 40 Wing Par 16 25 Engines
Edition: Model Aviation - 1985/02
Page Numbers: 68, 69, 70, 156, 157, 158
THIS IS THE SAGA years efforts Stunt competition outcome adventure has superior-flying air craft has will continue competitive levels Precision Aerobatics competition Competitor II turns well tracks better ST 60 nose has enough power complete pattern winds up 20 mph might question use word saga beginning article after reading illustrious introduction word chosen after run bad luck poor engineering led build ing three models five months first lost due folded wing effort build really light foolish use A-in spruce spars wing also failed locate ner ribs conjunction fuselage sides effect asking two small pieces spruce some /6-in contest balsa carry load entire wing An amateur should have seen problem coming needed hit head didnt take too long got about 30 flights airplane second airplane fell prey stooge cruel sense humor airplane beefed-up wing structure shown accompanying plans excellent flier achieved first-ever Expert win over 500 flights out practicing three weeks prior 1984 Nationals alone always-faithful stooge stooge thought might enjoy watching outside circle airplane flew Needless say dumbfounded Nats airplane took skies itself flew almost mile before plummeting ground resound ing crunch 68Model Aviation Top Picture Yourauthor/designer hiswayto second-place conteatfinish Com petitor II didnt say judging picture wed say performs well grass circle Above ship rather large designed all-out Precision Aerobatics competition 825 sq wing provides lift Supertigre 60 engine pro vides right power forthe 58-oz beautyto Precision Aerobatics pattern ease Youd think advanced state Control Line Precision Aerobatics models designs would fit mold tunately still folks attemp ting improve breed including author lightly-loaded model 60 engine Pete Bergstrom Up point season busy working various projects including article did have backup plane built three weeks away first Nationals com petition didnt have airplane fly quickly cleared workbench enlisted aid some friends Construc tion began flew model first time just three days before departing Reno finally finished trim appearance work night before leaving put two days hard practicing Reno Sunday Monday found out unneces sarily spooked high density alti tude went out again Monday night practice second flight night elevator pushrod failed metal fatigue after first loop four-leaf clover foolishly used brass quik-link connector heat soldering music wire pushrod softened brass build Competitor II use hardened steel link dont take chances Design theory some definite goals sat down last fall come up new airplane following year wanted airplane would turn blind ing corners track well penetrate give line tension wind could possibly need order solve problem blind ing turn went what thought would significant contribution extremely light wing loading first airplane weighed 49 oz giving wing loading 85 oz/sq ft lighter loading average competi tion Sailplane has airplane would surely turn sacrificed structural integrity light weight building phase wing didnt hold up next airplane weighed 57 oz due partially beefed-up wing ly rushed building job un necessary weight removed lacked suitable contest balsa gave wing loading 101 oz/sq ft provid ed very acceptable turn giving ship sufficient structural integ rity stooge let go put approximately 175 flights airplane six weeks order airplane track well left nose fairly long take advantage stabilizing effect propeller conjunction good-sized tail moment provides dampening effect center gravity CG locat ed well rear shown plans long tail moment provides enough force turn airplane extremely well prefer fly airplanes CG well rear almost point being tail-heavy order get maneuverability out nice stable forward-located CG great sport flier racer anything else expected maintain level flight through out entire circle ask airplane perform violent set maneuvers albeit beautiful such Precision Aerobatics pattern rearward CG will optimize aerodynamic proper ties aircraft make performing pattern much easier pilot theory good wind penetration simple overpower model could February 198569 Stunters today offering appearance jet aircraft Competitor Ils side view reminiscent full-size aerobatics plane provides welcome relief Upside-down isnt normal way start Supertigre 60 contest jitters dont get em helped cause flooded engine Bergstrom right others unidentified have sharpened leading edge would have degraded turning ability created early stall point fore opted go thick wing sec tion blunt nose allow airplane perform expectations simply put enough horsepower bully way through overhead figures pattern wind ST 60 chosen because brute horsepower 05 Max 45 has horsepower ST 60 rather because has usable power torque speed Stunt fliers like run engines size Competitor II allows run 13-in props associated yaw problems common large pro pellersand calm conditions 14-in props well does wonders line tension well turning usable power wind penetration subject line ten sion will notice have cluded movable rudder plane nor rudder offset time feel need either features build crooked fuselage straight fuselage rudder trim adds unwanted yawing motion makes difficulty trimming model phases flight Cowl design provides adequate cooling line tension comes engine power True adjusting lead-outs can provide some tension certain parts pattern cannot man ufacture line tension method same light can add pounds tip weight improve tension top will able avoid dropping wing good hard corner Its simple dont have line tension basic airframe/power plant combination will never manufacture will always have settle compromised situation best Construction Although airplane difficult build designed beginner Rather designed expert flier wants edge competition advanced flier looking move expert ranks Therefore am going clude blow-by-blow description construction rather Ill highlight im portant points Wing wing basic D-tube construc tion landing gear blocks secured 1A ply doublers W4 W6 lead-out guide constructed aluminum brass support piece X6-in aluminum cutout center slider movement individ ual guides constructed X6-in aluminum back plate brass eyelet wire pass through piece oc tagonal brass tubing spacer run cutout support piece washer slid over eyelet Continued page 156 70Model Aviation Hatch behind canopy provides access adjustable control system helps make flight trimming easier Total throw system can adjusted max pilot comfort Engine compartment clean uncluttered single hold-down boitforthe tank provkies ease adjustment muffler SST Specialty Products weighs mere 10 grams CL Speed/Hem pel Continued page 153 155mm pitch 61 secondbest flight placed Otello Vitre Italy 1638 mph 26370 kph using new OPS 25cc engines engines exhibited very good potential fast FAI Speed engines Italian models mounted sideways utilized single-blade prop design lao Guojun third-best flight day speed 1637 mph 2635 kph Friday September 21 last ficial flying day F2A Speed Hun garians really turned three best flights day capture World Speed Championship trophy second time fastest time day earned JozsefMolnar second place 1735 mph 2792 kph Sandor Szegedi time 1734 mph 2790 kph however Thursday flight 2801 kph good first place Jozsef Mult placed third speed 1727 mph 2779 kph Hungarian Speed team mem bers used Rossi engine handcarved single-blade props models utilized longest wingswhich made venetian blind slats really worked quite well just marked pattern desired aluminum slat sheared off excess upper lower halves glued together hardwood spar through center sup port rigidity wingspan models ranged 48 55 carrying cases models con structed meticulouslyjust like mod els themselves Saturday September 22 day everyone waiting momentous event winning competitors accepted plaques national anthems played ac companied raising countrys flag very emotional event awards banquet held Saturday evening Quality Inn Ballroom excellent band playing background music dinner served After dinner team trophies presented Hungarians taking first place Peoples Republic China placing second Italy third social event allowed talk different modelers around world discuss different ideas sign autographs swap souvenirs loved summarize World Champion ships rather difficult made new friends renewed old acquaintances feel opportunity lifetime participate Speed modelers missed World Championships certainly missed great modeling events year Gene Hempel 301 N Yale Dr Gar land TX 75042 PS table giving CLWC Speed results published page 124 January 1985 issue MA Competitor Il/Bergstrom Continued page 70 soldered hold assembly place adjustable screw Allen head 4-40 bolt screws threaded alumi num back plate through another octago nal spacer keep bolt centered support cutout entire assembly simply glued W18 bellcrank mount made two pieces % sq maple engine mount stock routed U-shaped channel shown provides extremely strong mounting point strengthens center section An 8-32 bolt run tween two maple bearers bellcrank floats between two mounts help two nuts top bottom bellcrank itself made 125-in T2404 aluminum another modification found neces sary after first ship airplane employed Fox bellcrank tremendous pull aircraft ears bellcrank bent upwards resemble bulls horns effectively reduc ing spacing approximately 2 heavier bellcrank havent problem flap control horn stray little normal construction tech niques order allow myself free dom adjust overall throw system well flap-to-elevator ratio incidence elevator relation flap about later talk about trimming build flap horn will need two telescoping sizes octagonal brass tubing smallest inner diam eter / A-in music wire horns themselves 4-40 bolt adjustable screw mechanism Cut two identical lengths octagonal tubing telescoping section solder together Silver solder 1A-in music wire ends drill center section 4-40 bolt solder place use brass main body pro vides ability tweak flaps needed use doubled center section provides strength stiffness necessary maintain set ting flight Combine assembly Du-Bros Swivel Link Quik-Link assem bly have completely-adjustable control system will serve well making pushrods remember use hardened 2-56 screws Quik Link attachment point will notice flap has piece / ply inboard side mounting horn horn needs mounted because slight amount taper trailing edge would cause flaps bind horn located further out tapered trailing edge used attempt stop torsional wing twist happening hard cor ner due center pressure moving aft angle attack increased Use 156Model Aviation Fun Fly ompeuaon Model Ideal Sunday Flyer Excellent OS 61 PS ptionally slow land ing speed le enough 1st Aileron model easily framed less S hrse balsa raft plywood construction ed fuil size plans Engine45 61 Wingspan62 Length OA541/4 Wing Area850 sq WeightA 6 Lbs Wing Loading 15 $7/o ox Designed Bob Lame kit market sold satisfaction guarantee money back LIST PRICE 94 S 5995 Introductory price offor limited time Prepald Continental USA Texas Residents Add 5% Sales Tax Send Money Orders Cashiers Check Next Day Shipping Allow 2 Weeks personal checks clear Sorry no COD Curtis Model Aircraft 3002 M Canterbury Circle Sherman Texas 75090 AC 214-893-61354 QfiYELAND GIANTS OR GIANT SCALE BUFFS Worlds Largest Gas Plans AssortneOt ___INTERNATIONALLY FAMOUS CD QUAUTh U MASTER MODELS PLANS 5D13ennoieIIe 21 $49 7CoooI Cot PBY5A $42 72 Cor 0351/4 [tO $4 104 Con Cot PBYSA $56 62 Honcord too Ike $43 96 Wriglrl-Novytoce $48 77 Boeing B-hG Port 835 52 W-Wnrcl3l Bed L $36 103 Boo t17G Fort $55 77WWnrI3l ted L $40 68 Doog 0-46A Ob $32 84 Pobber 07 FIr $39 108 Sibor 338 AropIr $49 6$ Hoenord P1 too $32 60 Boo 10Q Sport$36 70 Boylo Geo-Boe $33 90 Boo lOOSpori$49r 60 Sopeecoorin S6B $34 9SStinALow Wing$56 -89 Sopornoorino S6B $32 tO Mottle 74 T4M1$29 62 Cod Hocob P69 $40 7$ 8-Pgo 0400 tomb $42 94 CorHwb 965 FIr $54 10481-Pg 0400 Born $56 62 Egobbeod Vogo $24 65 MClrno Clipp. $55 74 Doolittlo G-B 11 $4t 97 MCbino Clippen $75 95 Monoooopo Sponl $36 68 We,I Whirincind $33 Boll Spo Bolidog $43 68 Byon Nonion $39 107 Aeronco C-3 Spt 835r 60 tBononeo VToil $39 Docmgloe 038 Obe $33 77 Looonrbo Sodon $25 132 Doogloc 038Ob$49 73 N Mitch Bomb $49 94 Pog. Cort toner $45 65 MMorocmdnr t26 049 71 Moclin 510 Bomb $39 81 08 Moqoito tb $43 * 73 Torn WW Bo 83510838 AKonqoBonrb $55 $42 POSloor PTl7Koydot 556 99 NBIk Widomo P61 $69 048ev Cornet Ron $24 71 Doog DC-3 Tron $32 Bonn MrMolligon $35 95 Doog DC3 Tron $55 mo 94 BOon Mr Molligon $45 06 Bomoke Toonon 13 $32 63 Boeing P-36A itr $36 105 Cor5201/4 L&S $55 84 Bong P-36A Pt $48 60 DongI0 M2 Med $24 teed C17t Srog $38 39 BrornotoceMeLA $54 - . ecIr C17B Slog $49r l07Gorn Bnorct POP $54 23 Lonk 11 Eleotro$3073 Tronol Air 6000$34 82 Lock 11 Binctrn840107 Mort Ms-I Borrr$44 62 Slinnon W SB$1691 Lindberg NX-21 1039 81 Stinnon 01W SB$3408 PoirclrPT19 Tr$59 nT122 Stmneon T/W SB $38 90 Woco Toper-Wing $3959 trretol Pt 92t $30 75 WenrId Lynonder $33 78 Orretol Ptr P3-B $32 100 WoetId Lynonder $49 110 Bristol P1 P2-B $45 57 Pord Triert 4-AT 02$ 74 T L Peeco Spen $45 76 Pord Triret 4-AT $45 lryroclcet XP5P-1 $30 114 Ford Trinrrr 4-AT $59 Co Wolrb P40 034 84 Sen-Joyce XPJ-2 $56 78 Loom glmtng P-3B $38 93 loening C-2Arrrplr $69 56 Rep Sco-Bee Arn 874 S8Gronr.12-P Dock $29 74 top SeoB Anrph 839 78 GronrJ3-P Dod $56 106 Pp J-3 Cob $39T 59 Gotho G1V Born $22 90 Lock Hodnon Brnb $20 117 Gotlmo G-1V Born $39 63 G orn P6P Hellcor 028 68 Oron-Winkle Bird $45 02 Tiger Icrorh 039 54 Ccr-r Smifr 5P934 $20 ~o\t4o Sod Tho SoolerPrices nobjeor ro clronge o 1200 Orhern 6- 7S Porrs Inni SOc Up Add 10% oil order dripping & in, etc. OSA Con & Olnecohore irs 15% 135% nir Pc o o combo 5200 inclode Price [icr Price icr fnoc non 010010 nir foreign odd $100 0$ CLEVELAND MODEL & SUPPLY Co 103070 DOTBOPT AVE CLEVELAND OHIO 44182 5NmS,cnm030,n 01030cm 120l5S0000 taper allows run spar per- type construction top pendicular fuselage Consequently block becomes merely cosmeticwith because center pressure runs exception area between Fl F2 parallel spar tendency twist area relieve balsa enough increase angle attack give adequate clearance bottom reduced engine necessary retain Dont forget add adjustable tip rigidity necessary front end weight box outboard tip prior handle torque put out ST 60 covering can use favorite method make balsa Lite Ply Stab elevator construction stab elevator bit unusual provides strong straight fairly lightweight structure First cut outline two units out lightweight A2 balsa glue half ribs A-in balsa main spar Sheet /16 balsa add leading edge Sand compo nents shape add hinges Lite Ply elevator horns Its rather simple Fuselage nothing unusual about construction fuselage some things need aware order build strong light Use medium balsa sides pre ferably 48-in stock strength difference between light medium bal sa tremendous weight differ ence negligible Dont forget add /16 sq balsa longerons top bot tom sides will add tremen dously shear strength stop fuselage twist sert cross-grained sheeting between fuselage sides will fit top fuselage formers addition hollowing bottom block first mark location formers block hollow between marks will tie bottom block order make very strong box out fuselage will surprised rigidity along entire length fuselage Fuel tank use square effi cient shape allows get fuel area have available have tried tapered shape previously get necessary fuel capacity about 7Y4 oz go between bearers fuel tank requirement taper angle required approximately ex tra 1 oz fuel carried engine would quit four-leaf clover because perform cutoff loop end flight pre vent overrun square shape might seem odd some might wonder per forms Ill tell will never go through hassle building another tapered tank absolutely no problem way fuel feeds biggest plus can construct tank about half time takes make tapered Another difference run fuel feed out inboard side tank can put needle valve side opposite muffler reason hate burned cut fingers resulting trying reach between rotating prop hot muffler have experienced no problem fuel feed due centrifugal force distance fuel travel short Because limited space tank compartment didnt have room typical J-bolt/rubberband hold-down arrangement adjusting tank Therefore simply run bolt through center tank blind nut mounted fuel compartment floor retain tank Landing gear Construction /-in music wire chose 2A-in Williams Bros Golden Age Wheels lightness using wheels make sure bush axle brass tubing dont wheels will last very long landing gear position shown pri marily hard-surfaced flying sites intend fly grass circle move gear forward about / Finishing Until can finish aircraft am really pleased com pared gorgeous beauties have seen will pretend expert area However no matter what method choose finishing Competitor II keep light Flying trimming found best combination nice stable flight speed 70-ft lines trued-up Zinger 13-6 propeller engine run ning rich four-cycle about 5500 rpm gives 54-sec laps very com fortable pattern final trim really no such thing final trim about / oz tip weight CG actually tp rear shown plans makes airplane extremely sensi tive would recommend start trimming process CG forward location As get used airplane slowly move CG aft until get kind turn want aircraft will tolerate such rearward CG because airfoiled stab actually lifts rear therefore combination aerodynamic forces wing stab combine total force well rear such rearward CG turn radius shortened considerably because lifting stab track landing characteristics airplane suffer trimming line tension remember work power end February 1985157 equation some tip weight achieve right results lead-out location Moving lead-out vain attempt manufacture line tension will cause problems appear caused something else Instead use largest prop will cause adverse yawing effect add tip weight just until outboard wing begins drop hard corner will close optimum setup best line ten sion aircraft still seems want come something wrong airframe should take home look warps twists time should touch lead-out location trimming line tension certain part maneuver such tops round loops will also need adjust lead-outs slightly shift CO mentioned before adjustable control system Now will give some tips use total throw system can adjusted flier com fort throughout maneuvers ie much actual throw use wrist myself have very little total movement up down therefore need fairly short moment arm flap control horn use four-inch bellcrank still gives leverage need wind operate control system ad dition being able change relation ship elevator flap can help solve tracking problem final trim V ended up very small amount down-elevator adjusted system made outside loops corners tighter inside adjusted inconsistency through handle until turn radius identical could write entire article trimming will leave recognized accomplished experts fieldmany have helped lot As matter fact trimming theories just presented originated Paul Walker never fully satisfied trim airplane Cardinal rules trimming though never change thing time always know started can go back last trim change did produce desired results am always trying some miniscule change just see what improvement can make flying characteristics aircraft Besides get lot practice flights way Remember want win Preci sion Aerobatics will have totally dedicate yourself end have good-flying aircraft will perform way want practice practice practice hope have same success aircraft have questions comments can contact home Pete Bergstrom 110 192nd Ct E Spanaway WA 98387 phone 206 847-3088 k Stamps 32 Page Tabloid size illustrated DISCOUNT Catalog Sent 1st Class Mail COMET- COX FLYLINE FOX GOLDBERG GUILLOWS JETCO K&3- PACTRA PECK POLYMER PERFECT SIG- STERLING SULLIVAN TOP FLITE & OTHERS PENN VILLEY HOllY CENTER Kim St Lan 19446 Niouport/Berliner Continued page 74 ventional pair I-struts very nimble little biplane suffered serious unreliability its Gnome Monosoupage engine Almost Nieuport 28s saw combat American squadrons French British preferred better-performing SPADs Sopwiths thats really another story entirely get better picture military airplanes true worth often pays listen what its opponents have say case Germans captured quite few versions Nieuport sesquiplane descriptions appeared wartime German aviation magazines course must keep mind requirements security morale can result intentionallydistorted picture being given Two articles translated pub lished British magazine Flight summer 1917 words reflect German opinion during war someones peacetime reflections Flugsport French aeroplanes Nieuport has important fighting machines Before advent modern SPAD machine sought after pilots Zeitschrjft fur Flugtechnic und c ikciA FUSROLASS & FOAN CONSTRUCTION FAI & AMA PArFERN 60.61 ENGINE M4 SPAN 704 sq AREA WEIGNT7 TO 8 LaS DEPENDING ON EQUIP BASIC KIT610795 DELUXE KIT$15995 ci AU U Man4& LSL MODEL PRODUCTS INQUIRIES INVITED813 388312 Dealers ributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELS KEB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIRING CUPS K4F 158Model Aviation 40 Wing Par 16 25 Engines
Edition: Model Aviation - 1985/02
Page Numbers: 68, 69, 70, 156, 157, 158
THIS IS THE SAGA years efforts Stunt competition outcome adventure has superior-flying air craft has will continue competitive levels Precision Aerobatics competition Competitor II turns well tracks better ST 60 nose has enough power complete pattern winds up 20 mph might question use word saga beginning article after reading illustrious introduction word chosen after run bad luck poor engineering led build ing three models five months first lost due folded wing effort build really light foolish use A-in spruce spars wing also failed locate ner ribs conjunction fuselage sides effect asking two small pieces spruce some /6-in contest balsa carry load entire wing An amateur should have seen problem coming needed hit head didnt take too long got about 30 flights airplane second airplane fell prey stooge cruel sense humor airplane beefed-up wing structure shown accompanying plans excellent flier achieved first-ever Expert win over 500 flights out practicing three weeks prior 1984 Nationals alone always-faithful stooge stooge thought might enjoy watching outside circle airplane flew Needless say dumbfounded Nats airplane took skies itself flew almost mile before plummeting ground resound ing crunch 68Model Aviation Top Picture Yourauthor/designer hiswayto second-place conteatfinish Com petitor II didnt say judging picture wed say performs well grass circle Above ship rather large designed all-out Precision Aerobatics competition 825 sq wing provides lift Supertigre 60 engine pro vides right power forthe 58-oz beautyto Precision Aerobatics pattern ease Youd think advanced state Control Line Precision Aerobatics models designs would fit mold tunately still folks attemp ting improve breed including author lightly-loaded model 60 engine Pete Bergstrom Up point season busy working various projects including article did have backup plane built three weeks away first Nationals com petition didnt have airplane fly quickly cleared workbench enlisted aid some friends Construc tion began flew model first time just three days before departing Reno finally finished trim appearance work night before leaving put two days hard practicing Reno Sunday Monday found out unneces sarily spooked high density alti tude went out again Monday night practice second flight night elevator pushrod failed metal fatigue after first loop four-leaf clover foolishly used brass quik-link connector heat soldering music wire pushrod softened brass build Competitor II use hardened steel link dont take chances Design theory some definite goals sat down last fall come up new airplane following year wanted airplane would turn blind ing corners track well penetrate give line tension wind could possibly need order solve problem blind ing turn went what thought would significant contribution extremely light wing loading first airplane weighed 49 oz giving wing loading 85 oz/sq ft lighter loading average competi tion Sailplane has airplane would surely turn sacrificed structural integrity light weight building phase wing didnt hold up next airplane weighed 57 oz due partially beefed-up wing ly rushed building job un necessary weight removed lacked suitable contest balsa gave wing loading 101 oz/sq ft provid ed very acceptable turn giving ship sufficient structural integ rity stooge let go put approximately 175 flights airplane six weeks order airplane track well left nose fairly long take advantage stabilizing effect propeller conjunction good-sized tail moment provides dampening effect center gravity CG locat ed well rear shown plans long tail moment provides enough force turn airplane extremely well prefer fly airplanes CG well rear almost point being tail-heavy order get maneuverability out nice stable forward-located CG great sport flier racer anything else expected maintain level flight through out entire circle ask airplane perform violent set maneuvers albeit beautiful such Precision Aerobatics pattern rearward CG will optimize aerodynamic proper ties aircraft make performing pattern much easier pilot theory good wind penetration simple overpower model could February 198569 Stunters today offering appearance jet aircraft Competitor Ils side view reminiscent full-size aerobatics plane provides welcome relief Upside-down isnt normal way start Supertigre 60 contest jitters dont get em helped cause flooded engine Bergstrom right others unidentified have sharpened leading edge would have degraded turning ability created early stall point fore opted go thick wing sec tion blunt nose allow airplane perform expectations simply put enough horsepower bully way through overhead figures pattern wind ST 60 chosen because brute horsepower 05 Max 45 has horsepower ST 60 rather because has usable power torque speed Stunt fliers like run engines size Competitor II allows run 13-in props associated yaw problems common large pro pellersand calm conditions 14-in props well does wonders line tension well turning usable power wind penetration subject line ten sion will notice have cluded movable rudder plane nor rudder offset time feel need either features build crooked fuselage straight fuselage rudder trim adds unwanted yawing motion makes difficulty trimming model phases flight Cowl design provides adequate cooling line tension comes engine power True adjusting lead-outs can provide some tension certain parts pattern cannot man ufacture line tension method same light can add pounds tip weight improve tension top will able avoid dropping wing good hard corner Its simple dont have line tension basic airframe/power plant combination will never manufacture will always have settle compromised situation best Construction Although airplane difficult build designed beginner Rather designed expert flier wants edge competition advanced flier looking move expert ranks Therefore am going clude blow-by-blow description construction rather Ill highlight im portant points Wing wing basic D-tube construc tion landing gear blocks secured 1A ply doublers W4 W6 lead-out guide constructed aluminum brass support piece X6-in aluminum cutout center slider movement individ ual guides constructed X6-in aluminum back plate brass eyelet wire pass through piece oc tagonal brass tubing spacer run cutout support piece washer slid over eyelet Continued page 156 70Model Aviation Hatch behind canopy provides access adjustable control system helps make flight trimming easier Total throw system can adjusted max pilot comfort Engine compartment clean uncluttered single hold-down boitforthe tank provkies ease adjustment muffler SST Specialty Products weighs mere 10 grams CL Speed/Hem pel Continued page 153 155mm pitch 61 secondbest flight placed Otello Vitre Italy 1638 mph 26370 kph using new OPS 25cc engines engines exhibited very good potential fast FAI Speed engines Italian models mounted sideways utilized single-blade prop design lao Guojun third-best flight day speed 1637 mph 2635 kph Friday September 21 last ficial flying day F2A Speed Hun garians really turned three best flights day capture World Speed Championship trophy second time fastest time day earned JozsefMolnar second place 1735 mph 2792 kph Sandor Szegedi time 1734 mph 2790 kph however Thursday flight 2801 kph good first place Jozsef Mult placed third speed 1727 mph 2779 kph Hungarian Speed team mem bers used Rossi engine handcarved single-blade props models utilized longest wingswhich made venetian blind slats really worked quite well just marked pattern desired aluminum slat sheared off excess upper lower halves glued together hardwood spar through center sup port rigidity wingspan models ranged 48 55 carrying cases models con structed meticulouslyjust like mod els themselves Saturday September 22 day everyone waiting momentous event winning competitors accepted plaques national anthems played ac companied raising countrys flag very emotional event awards banquet held Saturday evening Quality Inn Ballroom excellent band playing background music dinner served After dinner team trophies presented Hungarians taking first place Peoples Republic China placing second Italy third social event allowed talk different modelers around world discuss different ideas sign autographs swap souvenirs loved summarize World Champion ships rather difficult made new friends renewed old acquaintances feel opportunity lifetime participate Speed modelers missed World Championships certainly missed great modeling events year Gene Hempel 301 N Yale Dr Gar land TX 75042 PS table giving CLWC Speed results published page 124 January 1985 issue MA Competitor Il/Bergstrom Continued page 70 soldered hold assembly place adjustable screw Allen head 4-40 bolt screws threaded alumi num back plate through another octago nal spacer keep bolt centered support cutout entire assembly simply glued W18 bellcrank mount made two pieces % sq maple engine mount stock routed U-shaped channel shown provides extremely strong mounting point strengthens center section An 8-32 bolt run tween two maple bearers bellcrank floats between two mounts help two nuts top bottom bellcrank itself made 125-in T2404 aluminum another modification found neces sary after first ship airplane employed Fox bellcrank tremendous pull aircraft ears bellcrank bent upwards resemble bulls horns effectively reduc ing spacing approximately 2 heavier bellcrank havent problem flap control horn stray little normal construction tech niques order allow myself free dom adjust overall throw system well flap-to-elevator ratio incidence elevator relation flap about later talk about trimming build flap horn will need two telescoping sizes octagonal brass tubing smallest inner diam eter / A-in music wire horns themselves 4-40 bolt adjustable screw mechanism Cut two identical lengths octagonal tubing telescoping section solder together Silver solder 1A-in music wire ends drill center section 4-40 bolt solder place use brass main body pro vides ability tweak flaps needed use doubled center section provides strength stiffness necessary maintain set ting flight Combine assembly Du-Bros Swivel Link Quik-Link assem bly have completely-adjustable control system will serve well making pushrods remember use hardened 2-56 screws Quik Link attachment point will notice flap has piece / ply inboard side mounting horn horn needs mounted because slight amount taper trailing edge would cause flaps bind horn located further out tapered trailing edge used attempt stop torsional wing twist happening hard cor ner due center pressure moving aft angle attack increased Use 156Model Aviation Fun Fly ompeuaon Model Ideal Sunday Flyer Excellent OS 61 PS ptionally slow land ing speed le enough 1st Aileron model easily framed less S hrse balsa raft plywood construction ed fuil size plans Engine45 61 Wingspan62 Length OA541/4 Wing Area850 sq WeightA 6 Lbs Wing Loading 15 $7/o ox Designed Bob Lame kit market sold satisfaction guarantee money back LIST PRICE 94 S 5995 Introductory price offor limited time Prepald Continental USA Texas Residents Add 5% Sales Tax Send Money Orders Cashiers Check Next Day Shipping Allow 2 Weeks personal checks clear Sorry no COD Curtis Model Aircraft 3002 M Canterbury Circle Sherman Texas 75090 AC 214-893-61354 QfiYELAND GIANTS OR GIANT SCALE BUFFS Worlds Largest Gas Plans AssortneOt ___INTERNATIONALLY FAMOUS CD QUAUTh U MASTER MODELS PLANS 5D13ennoieIIe 21 $49 7CoooI Cot PBY5A $42 72 Cor 0351/4 [tO $4 104 Con Cot PBYSA $56 62 Honcord too Ike $43 96 Wriglrl-Novytoce $48 77 Boeing B-hG Port 835 52 W-Wnrcl3l Bed L $36 103 Boo t17G Fort $55 77WWnrI3l ted L $40 68 Doog 0-46A Ob $32 84 Pobber 07 FIr $39 108 Sibor 338 AropIr $49 6$ Hoenord P1 too $32 60 Boo 10Q Sport$36 70 Boylo Geo-Boe $33 90 Boo lOOSpori$49r 60 Sopeecoorin S6B $34 9SStinALow Wing$56 -89 Sopornoorino S6B $32 tO Mottle 74 T4M1$29 62 Cod Hocob P69 $40 7$ 8-Pgo 0400 tomb $42 94 CorHwb 965 FIr $54 10481-Pg 0400 Born $56 62 Egobbeod Vogo $24 65 MClrno Clipp. $55 74 Doolittlo G-B 11 $4t 97 MCbino Clippen $75 95 Monoooopo Sponl $36 68 We,I Whirincind $33 Boll Spo Bolidog $43 68 Byon Nonion $39 107 Aeronco C-3 Spt 835r 60 tBononeo VToil $39 Docmgloe 038 Obe $33 77 Looonrbo Sodon $25 132 Doogloc 038Ob$49 73 N Mitch Bomb $49 94 Pog. Cort toner $45 65 MMorocmdnr t26 049 71 Moclin 510 Bomb $39 81 08 Moqoito tb $43 * 73 Torn WW Bo 83510838 AKonqoBonrb $55 $42 POSloor PTl7Koydot 556 99 NBIk Widomo P61 $69 048ev Cornet Ron $24 71 Doog DC-3 Tron $32 Bonn MrMolligon $35 95 Doog DC3 Tron $55 mo 94 BOon Mr Molligon $45 06 Bomoke Toonon 13 $32 63 Boeing P-36A itr $36 105 Cor5201/4 L&S $55 84 Bong P-36A Pt $48 60 DongI0 M2 Med $24 teed C17t Srog $38 39 BrornotoceMeLA $54 - . ecIr C17B Slog $49r l07Gorn Bnorct POP $54 23 Lonk 11 Eleotro$3073 Tronol Air 6000$34 82 Lock 11 Binctrn840107 Mort Ms-I Borrr$44 62 Slinnon W SB$1691 Lindberg NX-21 1039 81 Stinnon 01W SB$3408 PoirclrPT19 Tr$59 nT122 Stmneon T/W SB $38 90 Woco Toper-Wing $3959 trretol Pt 92t $30 75 WenrId Lynonder $33 78 Orretol Ptr P3-B $32 100 WoetId Lynonder $49 110 Bristol P1 P2-B $45 57 Pord Triert 4-AT 02$ 74 T L Peeco Spen $45 76 Pord Triret 4-AT $45 lryroclcet XP5P-1 $30 114 Ford Trinrrr 4-AT $59 Co Wolrb P40 034 84 Sen-Joyce XPJ-2 $56 78 Loom glmtng P-3B $38 93 loening C-2Arrrplr $69 56 Rep Sco-Bee Arn 874 S8Gronr.12-P Dock $29 74 top SeoB Anrph 839 78 GronrJ3-P Dod $56 106 Pp J-3 Cob $39T 59 Gotho G1V Born $22 90 Lock Hodnon Brnb $20 117 Gotlmo G-1V Born $39 63 G orn P6P Hellcor 028 68 Oron-Winkle Bird $45 02 Tiger Icrorh 039 54 Ccr-r Smifr 5P934 $20 ~o\t4o Sod Tho SoolerPrices nobjeor ro clronge o 1200 Orhern 6- 7S Porrs Inni SOc Up Add 10% oil order dripping & in, etc. OSA Con & Olnecohore irs 15% 135% nir Pc o o combo 5200 inclode Price [icr Price icr fnoc non 010010 nir foreign odd $100 0$ CLEVELAND MODEL & SUPPLY Co 103070 DOTBOPT AVE CLEVELAND OHIO 44182 5NmS,cnm030,n 01030cm 120l5S0000 taper allows run spar per- type construction top pendicular fuselage Consequently block becomes merely cosmeticwith because center pressure runs exception area between Fl F2 parallel spar tendency twist area relieve balsa enough increase angle attack give adequate clearance bottom reduced engine necessary retain Dont forget add adjustable tip rigidity necessary front end weight box outboard tip prior handle torque put out ST 60 covering can use favorite method make balsa Lite Ply Stab elevator construction stab elevator bit unusual provides strong straight fairly lightweight structure First cut outline two units out lightweight A2 balsa glue half ribs A-in balsa main spar Sheet /16 balsa add leading edge Sand compo nents shape add hinges Lite Ply elevator horns Its rather simple Fuselage nothing unusual about construction fuselage some things need aware order build strong light Use medium balsa sides pre ferably 48-in stock strength difference between light medium bal sa tremendous weight differ ence negligible Dont forget add /16 sq balsa longerons top bot tom sides will add tremen dously shear strength stop fuselage twist sert cross-grained sheeting between fuselage sides will fit top fuselage formers addition hollowing bottom block first mark location formers block hollow between marks will tie bottom block order make very strong box out fuselage will surprised rigidity along entire length fuselage Fuel tank use square effi cient shape allows get fuel area have available have tried tapered shape previously get necessary fuel capacity about 7Y4 oz go between bearers fuel tank requirement taper angle required approximately ex tra 1 oz fuel carried engine would quit four-leaf clover because perform cutoff loop end flight pre vent overrun square shape might seem odd some might wonder per forms Ill tell will never go through hassle building another tapered tank absolutely no problem way fuel feeds biggest plus can construct tank about half time takes make tapered Another difference run fuel feed out inboard side tank can put needle valve side opposite muffler reason hate burned cut fingers resulting trying reach between rotating prop hot muffler have experienced no problem fuel feed due centrifugal force distance fuel travel short Because limited space tank compartment didnt have room typical J-bolt/rubberband hold-down arrangement adjusting tank Therefore simply run bolt through center tank blind nut mounted fuel compartment floor retain tank Landing gear Construction /-in music wire chose 2A-in Williams Bros Golden Age Wheels lightness using wheels make sure bush axle brass tubing dont wheels will last very long landing gear position shown pri marily hard-surfaced flying sites intend fly grass circle move gear forward about / Finishing Until can finish aircraft am really pleased com pared gorgeous beauties have seen will pretend expert area However no matter what method choose finishing Competitor II keep light Flying trimming found best combination nice stable flight speed 70-ft lines trued-up Zinger 13-6 propeller engine run ning rich four-cycle about 5500 rpm gives 54-sec laps very com fortable pattern final trim really no such thing final trim about / oz tip weight CG actually tp rear shown plans makes airplane extremely sensi tive would recommend start trimming process CG forward location As get used airplane slowly move CG aft until get kind turn want aircraft will tolerate such rearward CG because airfoiled stab actually lifts rear therefore combination aerodynamic forces wing stab combine total force well rear such rearward CG turn radius shortened considerably because lifting stab track landing characteristics airplane suffer trimming line tension remember work power end February 1985157 equation some tip weight achieve right results lead-out location Moving lead-out vain attempt manufacture line tension will cause problems appear caused something else Instead use largest prop will cause adverse yawing effect add tip weight just until outboard wing begins drop hard corner will close optimum setup best line ten sion aircraft still seems want come something wrong airframe should take home look warps twists time should touch lead-out location trimming line tension certain part maneuver such tops round loops will also need adjust lead-outs slightly shift CO mentioned before adjustable control system Now will give some tips use total throw system can adjusted flier com fort throughout maneuvers ie much actual throw use wrist myself have very little total movement up down therefore need fairly short moment arm flap control horn use four-inch bellcrank still gives leverage need wind operate control system ad dition being able change relation ship elevator flap can help solve tracking problem final trim V ended up very small amount down-elevator adjusted system made outside loops corners tighter inside adjusted inconsistency through handle until turn radius identical could write entire article trimming will leave recognized accomplished experts fieldmany have helped lot As matter fact trimming theories just presented originated Paul Walker never fully satisfied trim airplane Cardinal rules trimming though never change thing time always know started can go back last trim change did produce desired results am always trying some miniscule change just see what improvement can make flying characteristics aircraft Besides get lot practice flights way Remember want win Preci sion Aerobatics will have totally dedicate yourself end have good-flying aircraft will perform way want practice practice practice hope have same success aircraft have questions comments can contact home Pete Bergstrom 110 192nd Ct E Spanaway WA 98387 phone 206 847-3088 k Stamps 32 Page Tabloid size illustrated DISCOUNT Catalog Sent 1st Class Mail COMET- COX FLYLINE FOX GOLDBERG GUILLOWS JETCO K&3- PACTRA PECK POLYMER PERFECT SIG- STERLING SULLIVAN TOP FLITE & OTHERS PENN VILLEY HOllY CENTER Kim St Lan 19446 Niouport/Berliner Continued page 74 ventional pair I-struts very nimble little biplane suffered serious unreliability its Gnome Monosoupage engine Almost Nieuport 28s saw combat American squadrons French British preferred better-performing SPADs Sopwiths thats really another story entirely get better picture military airplanes true worth often pays listen what its opponents have say case Germans captured quite few versions Nieuport sesquiplane descriptions appeared wartime German aviation magazines course must keep mind requirements security morale can result intentionallydistorted picture being given Two articles translated pub lished British magazine Flight summer 1917 words reflect German opinion during war someones peacetime reflections Flugsport French aeroplanes Nieuport has important fighting machines Before advent modern SPAD machine sought after pilots Zeitschrjft fur Flugtechnic und c ikciA FUSROLASS & FOAN CONSTRUCTION FAI & AMA PArFERN 60.61 ENGINE M4 SPAN 704 sq AREA WEIGNT7 TO 8 LaS DEPENDING ON EQUIP BASIC KIT610795 DELUXE KIT$15995 ci AU U Man4& LSL MODEL PRODUCTS INQUIRIES INVITED813 388312 Dealers ributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELS KEB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIRING CUPS K4F 158Model Aviation 40 Wing Par 16 25 Engines
Edition: Model Aviation - 1985/02
Page Numbers: 68, 69, 70, 156, 157, 158
THIS IS THE SAGA years efforts Stunt competition outcome adventure has superior-flying air craft has will continue competitive levels Precision Aerobatics competition Competitor II turns well tracks better ST 60 nose has enough power complete pattern winds up 20 mph might question use word saga beginning article after reading illustrious introduction word chosen after run bad luck poor engineering led build ing three models five months first lost due folded wing effort build really light foolish use A-in spruce spars wing also failed locate ner ribs conjunction fuselage sides effect asking two small pieces spruce some /6-in contest balsa carry load entire wing An amateur should have seen problem coming needed hit head didnt take too long got about 30 flights airplane second airplane fell prey stooge cruel sense humor airplane beefed-up wing structure shown accompanying plans excellent flier achieved first-ever Expert win over 500 flights out practicing three weeks prior 1984 Nationals alone always-faithful stooge stooge thought might enjoy watching outside circle airplane flew Needless say dumbfounded Nats airplane took skies itself flew almost mile before plummeting ground resound ing crunch 68Model Aviation Top Picture Yourauthor/designer hiswayto second-place conteatfinish Com petitor II didnt say judging picture wed say performs well grass circle Above ship rather large designed all-out Precision Aerobatics competition 825 sq wing provides lift Supertigre 60 engine pro vides right power forthe 58-oz beautyto Precision Aerobatics pattern ease Youd think advanced state Control Line Precision Aerobatics models designs would fit mold tunately still folks attemp ting improve breed including author lightly-loaded model 60 engine Pete Bergstrom Up point season busy working various projects including article did have backup plane built three weeks away first Nationals com petition didnt have airplane fly quickly cleared workbench enlisted aid some friends Construc tion began flew model first time just three days before departing Reno finally finished trim appearance work night before leaving put two days hard practicing Reno Sunday Monday found out unneces sarily spooked high density alti tude went out again Monday night practice second flight night elevator pushrod failed metal fatigue after first loop four-leaf clover foolishly used brass quik-link connector heat soldering music wire pushrod softened brass build Competitor II use hardened steel link dont take chances Design theory some definite goals sat down last fall come up new airplane following year wanted airplane would turn blind ing corners track well penetrate give line tension wind could possibly need order solve problem blind ing turn went what thought would significant contribution extremely light wing loading first airplane weighed 49 oz giving wing loading 85 oz/sq ft lighter loading average competi tion Sailplane has airplane would surely turn sacrificed structural integrity light weight building phase wing didnt hold up next airplane weighed 57 oz due partially beefed-up wing ly rushed building job un necessary weight removed lacked suitable contest balsa gave wing loading 101 oz/sq ft provid ed very acceptable turn giving ship sufficient structural integ rity stooge let go put approximately 175 flights airplane six weeks order airplane track well left nose fairly long take advantage stabilizing effect propeller conjunction good-sized tail moment provides dampening effect center gravity CG locat ed well rear shown plans long tail moment provides enough force turn airplane extremely well prefer fly airplanes CG well rear almost point being tail-heavy order get maneuverability out nice stable forward-located CG great sport flier racer anything else expected maintain level flight through out entire circle ask airplane perform violent set maneuvers albeit beautiful such Precision Aerobatics pattern rearward CG will optimize aerodynamic proper ties aircraft make performing pattern much easier pilot theory good wind penetration simple overpower model could February 198569 Stunters today offering appearance jet aircraft Competitor Ils side view reminiscent full-size aerobatics plane provides welcome relief Upside-down isnt normal way start Supertigre 60 contest jitters dont get em helped cause flooded engine Bergstrom right others unidentified have sharpened leading edge would have degraded turning ability created early stall point fore opted go thick wing sec tion blunt nose allow airplane perform expectations simply put enough horsepower bully way through overhead figures pattern wind ST 60 chosen because brute horsepower 05 Max 45 has horsepower ST 60 rather because has usable power torque speed Stunt fliers like run engines size Competitor II allows run 13-in props associated yaw problems common large pro pellersand calm conditions 14-in props well does wonders line tension well turning usable power wind penetration subject line ten sion will notice have cluded movable rudder plane nor rudder offset time feel need either features build crooked fuselage straight fuselage rudder trim adds unwanted yawing motion makes difficulty trimming model phases flight Cowl design provides adequate cooling line tension comes engine power True adjusting lead-outs can provide some tension certain parts pattern cannot man ufacture line tension method same light can add pounds tip weight improve tension top will able avoid dropping wing good hard corner Its simple dont have line tension basic airframe/power plant combination will never manufacture will always have settle compromised situation best Construction Although airplane difficult build designed beginner Rather designed expert flier wants edge competition advanced flier looking move expert ranks Therefore am going clude blow-by-blow description construction rather Ill highlight im portant points Wing wing basic D-tube construc tion landing gear blocks secured 1A ply doublers W4 W6 lead-out guide constructed aluminum brass support piece X6-in aluminum cutout center slider movement individ ual guides constructed X6-in aluminum back plate brass eyelet wire pass through piece oc tagonal brass tubing spacer run cutout support piece washer slid over eyelet Continued page 156 70Model Aviation Hatch behind canopy provides access adjustable control system helps make flight trimming easier Total throw system can adjusted max pilot comfort Engine compartment clean uncluttered single hold-down boitforthe tank provkies ease adjustment muffler SST Specialty Products weighs mere 10 grams CL Speed/Hem pel Continued page 153 155mm pitch 61 secondbest flight placed Otello Vitre Italy 1638 mph 26370 kph using new OPS 25cc engines engines exhibited very good potential fast FAI Speed engines Italian models mounted sideways utilized single-blade prop design lao Guojun third-best flight day speed 1637 mph 2635 kph Friday September 21 last ficial flying day F2A Speed Hun garians really turned three best flights day capture World Speed Championship trophy second time fastest time day earned JozsefMolnar second place 1735 mph 2792 kph Sandor Szegedi time 1734 mph 2790 kph however Thursday flight 2801 kph good first place Jozsef Mult placed third speed 1727 mph 2779 kph Hungarian Speed team mem bers used Rossi engine handcarved single-blade props models utilized longest wingswhich made venetian blind slats really worked quite well just marked pattern desired aluminum slat sheared off excess upper lower halves glued together hardwood spar through center sup port rigidity wingspan models ranged 48 55 carrying cases models con structed meticulouslyjust like mod els themselves Saturday September 22 day everyone waiting momentous event winning competitors accepted plaques national anthems played ac companied raising countrys flag very emotional event awards banquet held Saturday evening Quality Inn Ballroom excellent band playing background music dinner served After dinner team trophies presented Hungarians taking first place Peoples Republic China placing second Italy third social event allowed talk different modelers around world discuss different ideas sign autographs swap souvenirs loved summarize World Champion ships rather difficult made new friends renewed old acquaintances feel opportunity lifetime participate Speed modelers missed World Championships certainly missed great modeling events year Gene Hempel 301 N Yale Dr Gar land TX 75042 PS table giving CLWC Speed results published page 124 January 1985 issue MA Competitor Il/Bergstrom Continued page 70 soldered hold assembly place adjustable screw Allen head 4-40 bolt screws threaded alumi num back plate through another octago nal spacer keep bolt centered support cutout entire assembly simply glued W18 bellcrank mount made two pieces % sq maple engine mount stock routed U-shaped channel shown provides extremely strong mounting point strengthens center section An 8-32 bolt run tween two maple bearers bellcrank floats between two mounts help two nuts top bottom bellcrank itself made 125-in T2404 aluminum another modification found neces sary after first ship airplane employed Fox bellcrank tremendous pull aircraft ears bellcrank bent upwards resemble bulls horns effectively reduc ing spacing approximately 2 heavier bellcrank havent problem flap control horn stray little normal construction tech niques order allow myself free dom adjust overall throw system well flap-to-elevator ratio incidence elevator relation flap about later talk about trimming build flap horn will need two telescoping sizes octagonal brass tubing smallest inner diam eter / A-in music wire horns themselves 4-40 bolt adjustable screw mechanism Cut two identical lengths octagonal tubing telescoping section solder together Silver solder 1A-in music wire ends drill center section 4-40 bolt solder place use brass main body pro vides ability tweak flaps needed use doubled center section provides strength stiffness necessary maintain set ting flight Combine assembly Du-Bros Swivel Link Quik-Link assem bly have completely-adjustable control system will serve well making pushrods remember use hardened 2-56 screws Quik Link attachment point will notice flap has piece / ply inboard side mounting horn horn needs mounted because slight amount taper trailing edge would cause flaps bind horn located further out tapered trailing edge used attempt stop torsional wing twist happening hard cor ner due center pressure moving aft angle attack increased Use 156Model Aviation Fun Fly ompeuaon Model Ideal Sunday Flyer Excellent OS 61 PS ptionally slow land ing speed le enough 1st Aileron model easily framed less S hrse balsa raft plywood construction ed fuil size plans Engine45 61 Wingspan62 Length OA541/4 Wing Area850 sq WeightA 6 Lbs Wing Loading 15 $7/o ox Designed Bob Lame kit market sold satisfaction guarantee money back LIST PRICE 94 S 5995 Introductory price offor limited time Prepald Continental USA Texas Residents Add 5% Sales Tax Send Money Orders Cashiers Check Next Day Shipping Allow 2 Weeks personal checks clear Sorry no COD Curtis Model Aircraft 3002 M Canterbury Circle Sherman Texas 75090 AC 214-893-61354 QfiYELAND GIANTS OR GIANT SCALE BUFFS Worlds Largest Gas Plans AssortneOt ___INTERNATIONALLY FAMOUS CD QUAUTh U MASTER MODELS PLANS 5D13ennoieIIe 21 $49 7CoooI Cot PBY5A $42 72 Cor 0351/4 [tO $4 104 Con Cot PBYSA $56 62 Honcord too Ike $43 96 Wriglrl-Novytoce $48 77 Boeing B-hG Port 835 52 W-Wnrcl3l Bed L $36 103 Boo t17G Fort $55 77WWnrI3l ted L $40 68 Doog 0-46A Ob $32 84 Pobber 07 FIr $39 108 Sibor 338 AropIr $49 6$ Hoenord P1 too $32 60 Boo 10Q Sport$36 70 Boylo Geo-Boe $33 90 Boo lOOSpori$49r 60 Sopeecoorin S6B $34 9SStinALow Wing$56 -89 Sopornoorino S6B $32 tO Mottle 74 T4M1$29 62 Cod Hocob P69 $40 7$ 8-Pgo 0400 tomb $42 94 CorHwb 965 FIr $54 10481-Pg 0400 Born $56 62 Egobbeod Vogo $24 65 MClrno Clipp. $55 74 Doolittlo G-B 11 $4t 97 MCbino Clippen $75 95 Monoooopo Sponl $36 68 We,I Whirincind $33 Boll Spo Bolidog $43 68 Byon Nonion $39 107 Aeronco C-3 Spt 835r 60 tBononeo VToil $39 Docmgloe 038 Obe $33 77 Looonrbo Sodon $25 132 Doogloc 038Ob$49 73 N Mitch Bomb $49 94 Pog. Cort toner $45 65 MMorocmdnr t26 049 71 Moclin 510 Bomb $39 81 08 Moqoito tb $43 * 73 Torn WW Bo 83510838 AKonqoBonrb $55 $42 POSloor PTl7Koydot 556 99 NBIk Widomo P61 $69 048ev Cornet Ron $24 71 Doog DC-3 Tron $32 Bonn MrMolligon $35 95 Doog DC3 Tron $55 mo 94 BOon Mr Molligon $45 06 Bomoke Toonon 13 $32 63 Boeing P-36A itr $36 105 Cor5201/4 L&S $55 84 Bong P-36A Pt $48 60 DongI0 M2 Med $24 teed C17t Srog $38 39 BrornotoceMeLA $54 - . ecIr C17B Slog $49r l07Gorn Bnorct POP $54 23 Lonk 11 Eleotro$3073 Tronol Air 6000$34 82 Lock 11 Binctrn840107 Mort Ms-I Borrr$44 62 Slinnon W SB$1691 Lindberg NX-21 1039 81 Stinnon 01W SB$3408 PoirclrPT19 Tr$59 nT122 Stmneon T/W SB $38 90 Woco Toper-Wing $3959 trretol Pt 92t $30 75 WenrId Lynonder $33 78 Orretol Ptr P3-B $32 100 WoetId Lynonder $49 110 Bristol P1 P2-B $45 57 Pord Triert 4-AT 02$ 74 T L Peeco Spen $45 76 Pord Triret 4-AT $45 lryroclcet XP5P-1 $30 114 Ford Trinrrr 4-AT $59 Co Wolrb P40 034 84 Sen-Joyce XPJ-2 $56 78 Loom glmtng P-3B $38 93 loening C-2Arrrplr $69 56 Rep Sco-Bee Arn 874 S8Gronr.12-P Dock $29 74 top SeoB Anrph 839 78 GronrJ3-P Dod $56 106 Pp J-3 Cob $39T 59 Gotho G1V Born $22 90 Lock Hodnon Brnb $20 117 Gotlmo G-1V Born $39 63 G orn P6P Hellcor 028 68 Oron-Winkle Bird $45 02 Tiger Icrorh 039 54 Ccr-r Smifr 5P934 $20 ~o\t4o Sod Tho SoolerPrices nobjeor ro clronge o 1200 Orhern 6- 7S Porrs Inni SOc Up Add 10% oil order dripping & in, etc. OSA Con & Olnecohore irs 15% 135% nir Pc o o combo 5200 inclode Price [icr Price icr fnoc non 010010 nir foreign odd $100 0$ CLEVELAND MODEL & SUPPLY Co 103070 DOTBOPT AVE CLEVELAND OHIO 44182 5NmS,cnm030,n 01030cm 120l5S0000 taper allows run spar per- type construction top pendicular fuselage Consequently block becomes merely cosmeticwith because center pressure runs exception area between Fl F2 parallel spar tendency twist area relieve balsa enough increase angle attack give adequate clearance bottom reduced engine necessary retain Dont forget add adjustable tip rigidity necessary front end weight box outboard tip prior handle torque put out ST 60 covering can use favorite method make balsa Lite Ply Stab elevator construction stab elevator bit unusual provides strong straight fairly lightweight structure First cut outline two units out lightweight A2 balsa glue half ribs A-in balsa main spar Sheet /16 balsa add leading edge Sand compo nents shape add hinges Lite Ply elevator horns Its rather simple Fuselage nothing unusual about construction fuselage some things need aware order build strong light Use medium balsa sides pre ferably 48-in stock strength difference between light medium bal sa tremendous weight differ ence negligible Dont forget add /16 sq balsa longerons top bot tom sides will add tremen dously shear strength stop fuselage twist sert cross-grained sheeting between fuselage sides will fit top fuselage formers addition hollowing bottom block first mark location formers block hollow between marks will tie bottom block order make very strong box out fuselage will surprised rigidity along entire length fuselage Fuel tank use square effi cient shape allows get fuel area have available have tried tapered shape previously get necessary fuel capacity about 7Y4 oz go between bearers fuel tank requirement taper angle required approximately ex tra 1 oz fuel carried engine would quit four-leaf clover because perform cutoff loop end flight pre vent overrun square shape might seem odd some might wonder per forms Ill tell will never go through hassle building another tapered tank absolutely no problem way fuel feeds biggest plus can construct tank about half time takes make tapered Another difference run fuel feed out inboard side tank can put needle valve side opposite muffler reason hate burned cut fingers resulting trying reach between rotating prop hot muffler have experienced no problem fuel feed due centrifugal force distance fuel travel short Because limited space tank compartment didnt have room typical J-bolt/rubberband hold-down arrangement adjusting tank Therefore simply run bolt through center tank blind nut mounted fuel compartment floor retain tank Landing gear Construction /-in music wire chose 2A-in Williams Bros Golden Age Wheels lightness using wheels make sure bush axle brass tubing dont wheels will last very long landing gear position shown pri marily hard-surfaced flying sites intend fly grass circle move gear forward about / Finishing Until can finish aircraft am really pleased com pared gorgeous beauties have seen will pretend expert area However no matter what method choose finishing Competitor II keep light Flying trimming found best combination nice stable flight speed 70-ft lines trued-up Zinger 13-6 propeller engine run ning rich four-cycle about 5500 rpm gives 54-sec laps very com fortable pattern final trim really no such thing final trim about / oz tip weight CG actually tp rear shown plans makes airplane extremely sensi tive would recommend start trimming process CG forward location As get used airplane slowly move CG aft until get kind turn want aircraft will tolerate such rearward CG because airfoiled stab actually lifts rear therefore combination aerodynamic forces wing stab combine total force well rear such rearward CG turn radius shortened considerably because lifting stab track landing characteristics airplane suffer trimming line tension remember work power end February 1985157 equation some tip weight achieve right results lead-out location Moving lead-out vain attempt manufacture line tension will cause problems appear caused something else Instead use largest prop will cause adverse yawing effect add tip weight just until outboard wing begins drop hard corner will close optimum setup best line ten sion aircraft still seems want come something wrong airframe should take home look warps twists time should touch lead-out location trimming line tension certain part maneuver such tops round loops will also need adjust lead-outs slightly shift CO mentioned before adjustable control system Now will give some tips use total throw system can adjusted flier com fort throughout maneuvers ie much actual throw use wrist myself have very little total movement up down therefore need fairly short moment arm flap control horn use four-inch bellcrank still gives leverage need wind operate control system ad dition being able change relation ship elevator flap can help solve tracking problem final trim V ended up very small amount down-elevator adjusted system made outside loops corners tighter inside adjusted inconsistency through handle until turn radius identical could write entire article trimming will leave recognized accomplished experts fieldmany have helped lot As matter fact trimming theories just presented originated Paul Walker never fully satisfied trim airplane Cardinal rules trimming though never change thing time always know started can go back last trim change did produce desired results am always trying some miniscule change just see what improvement can make flying characteristics aircraft Besides get lot practice flights way Remember want win Preci sion Aerobatics will have totally dedicate yourself end have good-flying aircraft will perform way want practice practice practice hope have same success aircraft have questions comments can contact home Pete Bergstrom 110 192nd Ct E Spanaway WA 98387 phone 206 847-3088 k Stamps 32 Page Tabloid size illustrated DISCOUNT Catalog Sent 1st Class Mail COMET- COX FLYLINE FOX GOLDBERG GUILLOWS JETCO K&3- PACTRA PECK POLYMER PERFECT SIG- STERLING SULLIVAN TOP FLITE & OTHERS PENN VILLEY HOllY CENTER Kim St Lan 19446 Niouport/Berliner Continued page 74 ventional pair I-struts very nimble little biplane suffered serious unreliability its Gnome Monosoupage engine Almost Nieuport 28s saw combat American squadrons French British preferred better-performing SPADs Sopwiths thats really another story entirely get better picture military airplanes true worth often pays listen what its opponents have say case Germans captured quite few versions Nieuport sesquiplane descriptions appeared wartime German aviation magazines course must keep mind requirements security morale can result intentionallydistorted picture being given Two articles translated pub lished British magazine Flight summer 1917 words reflect German opinion during war someones peacetime reflections Flugsport French aeroplanes Nieuport has important fighting machines Before advent modern SPAD machine sought after pilots Zeitschrjft fur Flugtechnic und c ikciA FUSROLASS & FOAN CONSTRUCTION FAI & AMA PArFERN 60.61 ENGINE M4 SPAN 704 sq AREA WEIGNT7 TO 8 LaS DEPENDING ON EQUIP BASIC KIT610795 DELUXE KIT$15995 ci AU U Man4& LSL MODEL PRODUCTS INQUIRIES INVITED813 388312 Dealers ributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC PO Box 2136 Fairfax Virginia 22031 USA Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airplane 4 Marine K&B FUELS KEB GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIRING CUPS K4F 158Model Aviation 40 Wing Par 16 25 Engines