THE BOSTONIAN Ev ers like small spot easy build semiscale pable good flights small gyms event wingspan 16 ii three fuselage lengi diameter six ture must enclose v X l/ inches minin least two wheels meter fuselage two side windows ol area course powered As originated seven grams Mooney muci tise size 14 grams would b cially inexperi club Scale Statte conducted several con rule like heavier model quite strong can survive bang ing around Free Flight models likely experience tissue can shrunk doped producing attractive model models can flown indoors outdoors rules may seem very restrictive variety designs have resulted much creativity being utilized tried canard configuration several reasons rub ber motor can run full length fuse lage maximum use turns large side area fuselage box could located rearward providing fin action upper picture power rubber motor tapering off Variant begins slow descent landing An illusion seems taking place model doesnt come down steeply picture seems indi cate lower picture glide looks normal goes San Diegos Aero space Museum Model can flown outdoors wind down Fudo Takagi pictures moved about produce best trim plastic propeller used rather sheet balsa shown dead weight will have right nose Perhaps some additional weight over 14-gram total will required plastic props two three times heavier builtup type An experienced modeler could built Variant down seven-gram rule would entail use smaller wood sizes con denser tissue covering no dope V Most important canard good flying stable configuration Some years ago canards rare early-day airplanes tailfirst canard design including famous Wright Flyer followed dearth type until Burt Rutan repopularized canard composite designs As model tailfirst arrangement can produce outstand ing flier rubber-powered Vari ant attests fits Bostonian event rules can flown indoors outdoors Full-size plan pages 90-91 plans printed full size magazine model can built directly Some construction ideas will given modeler has made small stick-and-tissue models sulation board such Cellotex makes good construction surface Pins can stuck easily yet stiff flat Fuselage two sides built atop other matched pair results Care must taken angles wing stabilizer accurate according plans curved sections longerons Whether seen above below evident Variant has crisp pleasing lines Flying tail-first its also different run mill balsa prop made according text plan recommended plastic prop can used expect diminished performance January 1984 71 should pre-bent dont springsary way will have handle back change angleshold onto bending strips Soak Cut strips inch longer neces-Continued page 169 BEND TWO PIECES OF 1/32X 1/16TO FORM TIP STAB I H SPAR TAPERED 1 11 BREAK HERE F p B j STAB THIN METAL UBEARING AS 008 BRASS [-j*1 PROP SHAFT BEARING DETAIL 1/8 VERY/ HARD /8DISCliii I WIRE 41 [020 III I\ I II k 450BLADE ANGLE if' fi 1 - 1/32 It U 1Ij II 1I ACTUAL LONGERON LENGTH 0015WIRE SKID 1 / / BALSA / / I/ PROP JIG II I II i1iJIG FORMER Ii II Ii II ii iI Ii II II II II II Ii BALANC WITH DL 14 GRAM BOSTONIAN CMOAVL FULL SI / Ii I/I Text pages 70-7 1 IfiMEOIUM BALSA HARD BALSAS - DIHEDRAL--~ p I______ G ARE FLAT1 TIP DIHEDRAL 1/16 ALTUBE — -N II IIU III ELAGE TOP VIEWI/ III II/I E NNuI -- STAB MODEL FLIES ON 20 LOOP OF 5/32 3/16RUBBER NOSE FIN _______ ______N 25-----I 1/16 MEDIUMBALSA_ NOTE THIS ANGLEV CCESS HOLE RE TOR 1132 SHEET RIBS WHEELS MADE OF TWO 1/32DISCS CROSSORAIN NQ ment advance wound frantically order ready launch thermal peaked generally soggy conditions new Espada model become wet launched solid balsa wings started fluttering model dove ground breaking wing tips Without hesitation Doring reached spare model waiting state readiness Within two minutes spare wound launched its way convincing max Doring quite surprised little disbelieving learn already 1983 FlB Wakefield Rubber World Cham pion third person tory win two consecutive World Championships first place secured battle remaining positions start round Anzelmo second followed McGihivray Zhang Kilpelainen Zhang scored 161 sec Kilpelainen 146 showing event no means over Jack McGillivray changed models wet condi tions choosing covered Micafilm would waterpfoof managed 110 sec Meanwhile Gun ter Klemke Round 6 flight dropped him eighth scored rare 180 put him back running Steve Beebe could have caught up final flight 116 sec As place positions changed important flight yet made Anzelmo Zen under helpful guid ance Dutch Team Manager Peter De Boer stood alone line waiting launch Several good patches air passed bywith models appearing climb well overheadbut certain 20 mm remaining started rain again heavily Having held motor some consid erable time Zermi took opportunity change motors rewind event ually launched time running out climb good conditions moderate probably longest 180 sec Dutchman can remember Anzelmo Zen second As other scores came con firmed Gunther Klemke taken third Lothar Doring Ger man team instead flying individualiy Germans could have taken team prize too As Chinese team convincing winner having held top position throughout contest Italy held onto second place Great Britain having its best World Champs years third Variant/Mather Continued page 71 MORE COLOR 0 Ge ~Lr6 QO r0 0 \\e eS AO iron too hot Draw wet scrap pieces balsa across iron bending si multaneously Too much bending will course break wood Practice will teach much pressure can tolerated Much depends upon hardness grain wood Stubborn pieces can dipped water few draws Eventually wood should nearly conform plan curves rear fuselage built con tinuously up through motor tube will located Later part will cut away Note longerons actually longer appears direct side view because rear part fuselage bent sharply form point two jig formers big help proHOBBYPOXY PRODUCTS a division Pettit Paint Company Inc 10 Pine Street Box 378 Rockaway NJ 07866-0378 ducing accurate fuselage sim ply rectangular pieces sheet balsa cut fit between sides fuselage shown Form box two fuselage sides formers glue still soft set box over top view fuselage alignment can checked glue hardens notch inside longerons sharp bend oc curs Crack longerons bend fill notch will glue pin rear fuse lage together Check top view alignment again Cut front crosspieces glue place sides can held against crosspieces sliding bottle side glue set add crosspieces nose block landing gear etc January 1984 169 strips some scrap pieces water hour Allow soldering iron par tially heat up Test holding piece balsa against iron chars once slots wing stab left rec tangular until testing completed incidence changes can made necessary Remove jig formers Cut rectangular piece balsa motor tube should wide enough fit around form used /2-in drill shank works fine sheet can thinner 2 sand down thinner tube could smaller dia meter still carry rubber made ing tube could used protect fuselage during wind ing rubber Soak wood overnight water lash form narrow cloth strip old sheet Bake 2500 hour Glue seam cut V-slot tube fits over rear fuselage Pencil lightly around tube contacts fuselage Cut away part fuselage inside tube within / pencil mark Glue tube place Prop blades cut 2 sheet can sanded thinner also Soak water overnight lash large coffee can tips skewed about 150 left Bake hour 2500 prop spar should very hard balsa center should /o diameter spar tapered points center prop jig necessary us get blade angles correct Some modelers eye small sketch shows upright piece needed prop shaft 450 piece blade two vertical pieces glued base l/4 apart will give Il-in pitch Sharpen end prop shaft wire push through center prop sparbut glue yet Slot blades accept prop spar Glue blade spar glue still soft set pieces jig Hold wire shaft upright piece tape strip let blade lay against 450 sheet glue set complete other half motor tube plug made two discs /t balsa glued crossgrain smaller disc should snug fit motor tube larger disc overlaps tube holes prop shaft can punched through metal pins metal thin few pins may get bent over no small drill available pins will job Pins tapered hammer far enough shaft can spin freely side metal will have big burr put side against balsa gluing bearing plug Slide shaft through plug add small washer glass bead desired good glue shoulder prop shaft will suffice though Slide prop shaft through previously-made hole bend end shaft over Glue securely Build up glue shoulder inside prop hub applying several coats glue will form smooth fillet left itself wanted As coat begins harden use razor blade push glue down flat shoulder around shaft piece Ao-in 2-in aluminum tubing makes good anchor peg front rubber hole cut underside nose can see string motor Wing stab Make stabilizer edges spar hard balsa stab front likely take brunt collision forces Tapering spar gives added strength fuselage-stabilizer joint high-stress point tips bent like fuselage longerons ever made two laminations give added rigidity against pulling tissue Shape ribs siack rectangular pieces very much alike First cut rectangular pieces rib about A6 larger ribs Trace rib shape two pieces Stack pieces like deck cards two traced ribs outside Shape entire stack rib outline including notching spars Taper spar notch end other case stab Make center panels wing stab top spars place allowing spars extend /o beyond end rib Allow glue set thoroughly chance warping reduced Assemble tip sections spars Glue center sections tips propped up dihedral add spars making good fit ends spars center panels Check surfaces warps before covering present hold warped area jet steam twist opposite warp Cover model lightweight tissue water-shrink As tissue dries pin center panels flat surface resist warping Apply two thin coats dope two parts thinner part dope again protecting against warps steam treatment can remove warps covered surfaces also fuselage area above wing stab left uncovered until flight tests completed Flying Glue wing stab position lightly Check balance point add clay lead nose tail bring location shown plans original model flown right against tor que took several degrees right thrust shown plan end motor tube angled change thrust first tests make motor just long enough reach prop hook peg Such motor can easily wound hand quick testing Wind about 100 turns launch model level flight just couple feet off ground Unless serious errors made during con struction small corrections will nec essary diving tendency cut lead ing edge stab free prop up Thin strips cut IBM tab card work fine small changes model tends stall fly straight increase offset thrust tighten turn stalling per170 Model Aviation Tired Being Shot Down SUPER SERVO GARD Controls Throttle Cant * Constantly monitors receiver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smash-ups Endersed IMAAShew Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt Cut-Out Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negative pulse ordering RF Enterprises 106 N Main St Arlington OH 45814 419 365-5056 GIANT SCALE & SPORT PLANS SETS & KITS order contains concise construction manual Partial kits include precut wing ribs fuselage formers prebent lending gear already have pier sets may deduct 1000 prices partial kits listed below Fiberglass parts available no longer carry full kits J B Special MK 4 convertible 54~ Monoplane 75 Biplane Weighs 18 lbs Low Wing Biplane fr Parasol Plans $1700Plans $1700 Partial Kit $1500 EitherBoth Partial Kit $9500 Travel Air 2000 105 classic Scale Biplane Wt 23 lbs Plans $1700Partial Kit $13000 Travel Air 4000 99 Radial Eng classic Biplane 23 lbs Plans $1700Partial Kit $13000 Fokker 0-ViI 58 German WWI Rghter Biplane 23 lbs Plans $1700Partial Kit $13000 Sopwith Tripehound50 WWI Triplane 17 lbs Plans $1700Partial Kit $14000 Sopwitli Pup80 WWI Biplane16-17 lbs Plans $1700Partial Kit $13000 WACO UPF790 Biplane 23 lbsPlans $1700 Airplanes Landing Gear 2wire formed $995 hipping Assembled ready install $1996 hipping lWheel Pants models add $51 Cabanas$995 hipping Fokker Cabanas$1495 hipping HamSway Packageincludes famous Behrens strut system$1195PP Ordering information orders shipped UPS Par cel Post edd $3 shipping plans $10 kits Make checks payable Jerry Behrens fastest service send Postal Money Order bank check Sorry no CODs accepted Send mail orders BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 Phone 1212 3374957 Allow weeks delivery ists cut trailing edge stab free nd prop up Go easy trim though s angle shown plan nearly riinimum thats possible flying Moving ne weight forward will help prevent stalI ng also circle made small such 0 feet may necessary raise front f stab somewhat short motor model should tall little power off full ength motor will add weight forward educe eliminate stall As trim ning refined increased turns finally ry longer motors small fin added nose make turn tighter though model flew well model could probably lown left particularly flown ndoors under low ceiling low power s used ROG flying found large arking lots some supermarkets great et early dawn hours sir still vacant day aving such fun took flight hough light breeze sprung upyes vas weak thermal model landed s K-Man roof Later approached manager surprised showed no irritation went right up roof retrieve model turned out used build fly models Another time large dog walking small man spoke strong accent much interested model WW LI worked Willy Messerschmitt So sorts teresting things seem happen flying Variant case hobby shop doesnt stock parts models such Variant names addresses two mail order sup pliers Im sure Oldtimer Models PO Box 913 Westminster CA 92683 Peck-Polymers PO Box 2498 La Mesa CA 92041 CL Scale/Boss Continued paoe 72 probably contributed Les observations team selection contest open entry did make difference beginner expert under entry circumstances would no doubt see some unskilled modelers problems discussed commentary brings mind some basic ques tions right have completely open competition World Championship team selection Should entry vitation based past performance local National contests Should teamselection program result showcase event very best compete have thoughts matter drop line write National Association Scale Aeromodelers NASA John Guen ther President Box 714 RR #1 Borden IN 47106 Im sure comments will well-received could help NASA planning future Scale team selection pro grams Before closing item should AL-TEC PROdUCTS INC INTRODUCES NEW BUILDING CONCEPT unique ALISpARl&2 AL-T-SpAR 2 [patent pending] integral component uni-structure membered light weight Alum inum beam T spar Specially planned total model aircraft world mind STRONG easy use balsa foam wings tail planes Spar material Aluminum alloy 018 nominal thick ALISpAR1 • 8 az/ft 1/8x3/8 hollow flanges 7/8 overall height $200 per lineal ft sailable 2ft 3ff 4ft Only AlISpAR2 z/ft. 1/8 3/8 hollow flanges 1 3/ oa Ht $215 per ml ftl available in4 ft AL-joIMER 090 339 6 2024 T6 Aluminum $100 es TijoiNER Isee above AIjoiner dimensional grade 4 A/C titanium $100 eal AI-TSpars proportioned /z dimensions AIl-Spars Price length same AL-TEC Products Inc PO Box 3591 Boardman OH 44512 noted NASA sponsored ran years Scale team selection program first time completely independent func tion AMA event reports coming indicate NASA local Louisville clubs did excellent job Congratulations Finishing made easy Charles Bauer Norridge IL tells us following few simple steps too can greatly reduce effort required put finish Sport Scale model Charles flew fine-looking A6M2 Zero fighter see accompanying photos 1983 Nats con siderable amount rivet skin panel de tail finish modelers should able produce quite easily Rather using extensive applications balsa filler paint obtain good finish Zero Charles did minor amount grain-filling applied chrome MonoKote covering per instruc tions accompanying covering mateial After MonoKote covering com pleted skin panel outlines rivet patterns applied Skin panel outlines made scoring covering fine ball-point pen similar object Care should taken cut through covering flexible plastic ruler can used curved surfaces model keep panel lines straight Rivet markings made lightly pressing dressmakers pattern tracing wheel MonoKote surface right pressure experiment test pieces will produce indentation viewed distance several feet will look very much like flush rivets Once again flexible ruler used wheel held against producing straight lines rivets pattern tracing wheel know what is about inch diameter has teeth similar Send $100 Building Guide AI-Tec Product list deducted form 1st order gear usually mounted small plas tic handle can found stores sell sewing supplies little shopping around will turn up wheels varying num bers teeth making useful pro ducing patterns different rivet spacings rivet panel markings completed covering surface should rubbed lightly fine steel wool steel wool will provide finely-scratched surface better adherence expoxy-paint fin ish case Zero Charles used K&Bs Superpoxy Matched Finish System paints Another advantage using chrome MonoKote decide weather model aluminum color automatically shows through heavilyworn areas youre deciding finish next Sport Scale model might want try Charles Bauers time saving approach Something new time read item new version three-line bellcrank will available L-R Products Ltd new bellerank shortspan type approximately 2/2 between elevator line connection points same heavy-duty construction original G-S units major difference between new units original G-S units location elevator pushrod con nection much same old Roberts units new design allows unit mounted much smaller space larger G-S Units therefore suitable use smaller Scale models scale Class Carrier new L-R units come upright inverted mounting versions provide extra throttle control did G-S Units youre looking larger G-S units large Scale model too can obtained L-R Products Ltd data January 1984 171
Edition: Model Aviation - 1984/01
Page Numbers: 70, 71, 90, 91, 169, 170, 171
THE BOSTONIAN Ev ers like small spot easy build semiscale pable good flights small gyms event wingspan 16 ii three fuselage lengi diameter six ture must enclose v X l/ inches minin least two wheels meter fuselage two side windows ol area course powered As originated seven grams Mooney muci tise size 14 grams would b cially inexperi club Scale Statte conducted several con rule like heavier model quite strong can survive bang ing around Free Flight models likely experience tissue can shrunk doped producing attractive model models can flown indoors outdoors rules may seem very restrictive variety designs have resulted much creativity being utilized tried canard configuration several reasons rub ber motor can run full length fuse lage maximum use turns large side area fuselage box could located rearward providing fin action upper picture power rubber motor tapering off Variant begins slow descent landing An illusion seems taking place model doesnt come down steeply picture seems indi cate lower picture glide looks normal goes San Diegos Aero space Museum Model can flown outdoors wind down Fudo Takagi pictures moved about produce best trim plastic propeller used rather sheet balsa shown dead weight will have right nose Perhaps some additional weight over 14-gram total will required plastic props two three times heavier builtup type An experienced modeler could built Variant down seven-gram rule would entail use smaller wood sizes con denser tissue covering no dope V Most important canard good flying stable configuration Some years ago canards rare early-day airplanes tailfirst canard design including famous Wright Flyer followed dearth type until Burt Rutan repopularized canard composite designs As model tailfirst arrangement can produce outstand ing flier rubber-powered Vari ant attests fits Bostonian event rules can flown indoors outdoors Full-size plan pages 90-91 plans printed full size magazine model can built directly Some construction ideas will given modeler has made small stick-and-tissue models sulation board such Cellotex makes good construction surface Pins can stuck easily yet stiff flat Fuselage two sides built atop other matched pair results Care must taken angles wing stabilizer accurate according plans curved sections longerons Whether seen above below evident Variant has crisp pleasing lines Flying tail-first its also different run mill balsa prop made according text plan recommended plastic prop can used expect diminished performance January 1984 71 should pre-bent dont springsary way will have handle back change angleshold onto bending strips Soak Cut strips inch longer neces-Continued page 169 BEND TWO PIECES OF 1/32X 1/16TO FORM TIP STAB I H SPAR TAPERED 1 11 BREAK HERE F p B j STAB THIN METAL UBEARING AS 008 BRASS [-j*1 PROP SHAFT BEARING DETAIL 1/8 VERY/ HARD /8DISCliii I WIRE 41 [020 III I\ I II k 450BLADE ANGLE if' fi 1 - 1/32 It U 1Ij II 1I ACTUAL LONGERON LENGTH 0015WIRE SKID 1 / / BALSA / / I/ PROP JIG II I II i1iJIG FORMER Ii II Ii II ii iI Ii II II II II II Ii BALANC WITH DL 14 GRAM BOSTONIAN CMOAVL FULL SI / Ii I/I Text pages 70-7 1 IfiMEOIUM BALSA HARD BALSAS - DIHEDRAL--~ p I______ G ARE FLAT1 TIP DIHEDRAL 1/16 ALTUBE — -N II IIU III ELAGE TOP VIEWI/ III II/I E NNuI -- STAB MODEL FLIES ON 20 LOOP OF 5/32 3/16RUBBER NOSE FIN _______ ______N 25-----I 1/16 MEDIUMBALSA_ NOTE THIS ANGLEV CCESS HOLE RE TOR 1132 SHEET RIBS WHEELS MADE OF TWO 1/32DISCS CROSSORAIN NQ ment advance wound frantically order ready launch thermal peaked generally soggy conditions new Espada model become wet launched solid balsa wings started fluttering model dove ground breaking wing tips Without hesitation Doring reached spare model waiting state readiness Within two minutes spare wound launched its way convincing max Doring quite surprised little disbelieving learn already 1983 FlB Wakefield Rubber World Cham pion third person tory win two consecutive World Championships first place secured battle remaining positions start round Anzelmo second followed McGihivray Zhang Kilpelainen Zhang scored 161 sec Kilpelainen 146 showing event no means over Jack McGillivray changed models wet condi tions choosing covered Micafilm would waterpfoof managed 110 sec Meanwhile Gun ter Klemke Round 6 flight dropped him eighth scored rare 180 put him back running Steve Beebe could have caught up final flight 116 sec As place positions changed important flight yet made Anzelmo Zen under helpful guid ance Dutch Team Manager Peter De Boer stood alone line waiting launch Several good patches air passed bywith models appearing climb well overheadbut certain 20 mm remaining started rain again heavily Having held motor some consid erable time Zermi took opportunity change motors rewind event ually launched time running out climb good conditions moderate probably longest 180 sec Dutchman can remember Anzelmo Zen second As other scores came con firmed Gunther Klemke taken third Lothar Doring Ger man team instead flying individualiy Germans could have taken team prize too As Chinese team convincing winner having held top position throughout contest Italy held onto second place Great Britain having its best World Champs years third Variant/Mather Continued page 71 MORE COLOR 0 Ge ~Lr6 QO r0 0 \\e eS AO iron too hot Draw wet scrap pieces balsa across iron bending si multaneously Too much bending will course break wood Practice will teach much pressure can tolerated Much depends upon hardness grain wood Stubborn pieces can dipped water few draws Eventually wood should nearly conform plan curves rear fuselage built con tinuously up through motor tube will located Later part will cut away Note longerons actually longer appears direct side view because rear part fuselage bent sharply form point two jig formers big help proHOBBYPOXY PRODUCTS a division Pettit Paint Company Inc 10 Pine Street Box 378 Rockaway NJ 07866-0378 ducing accurate fuselage sim ply rectangular pieces sheet balsa cut fit between sides fuselage shown Form box two fuselage sides formers glue still soft set box over top view fuselage alignment can checked glue hardens notch inside longerons sharp bend oc curs Crack longerons bend fill notch will glue pin rear fuse lage together Check top view alignment again Cut front crosspieces glue place sides can held against crosspieces sliding bottle side glue set add crosspieces nose block landing gear etc January 1984 169 strips some scrap pieces water hour Allow soldering iron par tially heat up Test holding piece balsa against iron chars once slots wing stab left rec tangular until testing completed incidence changes can made necessary Remove jig formers Cut rectangular piece balsa motor tube should wide enough fit around form used /2-in drill shank works fine sheet can thinner 2 sand down thinner tube could smaller dia meter still carry rubber made ing tube could used protect fuselage during wind ing rubber Soak wood overnight water lash form narrow cloth strip old sheet Bake 2500 hour Glue seam cut V-slot tube fits over rear fuselage Pencil lightly around tube contacts fuselage Cut away part fuselage inside tube within / pencil mark Glue tube place Prop blades cut 2 sheet can sanded thinner also Soak water overnight lash large coffee can tips skewed about 150 left Bake hour 2500 prop spar should very hard balsa center should /o diameter spar tapered points center prop jig necessary us get blade angles correct Some modelers eye small sketch shows upright piece needed prop shaft 450 piece blade two vertical pieces glued base l/4 apart will give Il-in pitch Sharpen end prop shaft wire push through center prop sparbut glue yet Slot blades accept prop spar Glue blade spar glue still soft set pieces jig Hold wire shaft upright piece tape strip let blade lay against 450 sheet glue set complete other half motor tube plug made two discs /t balsa glued crossgrain smaller disc should snug fit motor tube larger disc overlaps tube holes prop shaft can punched through metal pins metal thin few pins may get bent over no small drill available pins will job Pins tapered hammer far enough shaft can spin freely side metal will have big burr put side against balsa gluing bearing plug Slide shaft through plug add small washer glass bead desired good glue shoulder prop shaft will suffice though Slide prop shaft through previously-made hole bend end shaft over Glue securely Build up glue shoulder inside prop hub applying several coats glue will form smooth fillet left itself wanted As coat begins harden use razor blade push glue down flat shoulder around shaft piece Ao-in 2-in aluminum tubing makes good anchor peg front rubber hole cut underside nose can see string motor Wing stab Make stabilizer edges spar hard balsa stab front likely take brunt collision forces Tapering spar gives added strength fuselage-stabilizer joint high-stress point tips bent like fuselage longerons ever made two laminations give added rigidity against pulling tissue Shape ribs siack rectangular pieces very much alike First cut rectangular pieces rib about A6 larger ribs Trace rib shape two pieces Stack pieces like deck cards two traced ribs outside Shape entire stack rib outline including notching spars Taper spar notch end other case stab Make center panels wing stab top spars place allowing spars extend /o beyond end rib Allow glue set thoroughly chance warping reduced Assemble tip sections spars Glue center sections tips propped up dihedral add spars making good fit ends spars center panels Check surfaces warps before covering present hold warped area jet steam twist opposite warp Cover model lightweight tissue water-shrink As tissue dries pin center panels flat surface resist warping Apply two thin coats dope two parts thinner part dope again protecting against warps steam treatment can remove warps covered surfaces also fuselage area above wing stab left uncovered until flight tests completed Flying Glue wing stab position lightly Check balance point add clay lead nose tail bring location shown plans original model flown right against tor que took several degrees right thrust shown plan end motor tube angled change thrust first tests make motor just long enough reach prop hook peg Such motor can easily wound hand quick testing Wind about 100 turns launch model level flight just couple feet off ground Unless serious errors made during con struction small corrections will nec essary diving tendency cut lead ing edge stab free prop up Thin strips cut IBM tab card work fine small changes model tends stall fly straight increase offset thrust tighten turn stalling per170 Model Aviation Tired Being Shot Down SUPER SERVO GARD Controls Throttle Cant * Constantly monitors receiver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smash-ups Endersed IMAAShew Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt Cut-Out Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negative pulse ordering RF Enterprises 106 N Main St Arlington OH 45814 419 365-5056 GIANT SCALE & SPORT PLANS SETS & KITS order contains concise construction manual Partial kits include precut wing ribs fuselage formers prebent lending gear already have pier sets may deduct 1000 prices partial kits listed below Fiberglass parts available no longer carry full kits J B Special MK 4 convertible 54~ Monoplane 75 Biplane Weighs 18 lbs Low Wing Biplane fr Parasol Plans $1700Plans $1700 Partial Kit $1500 EitherBoth Partial Kit $9500 Travel Air 2000 105 classic Scale Biplane Wt 23 lbs Plans $1700Partial Kit $13000 Travel Air 4000 99 Radial Eng classic Biplane 23 lbs Plans $1700Partial Kit $13000 Fokker 0-ViI 58 German WWI Rghter Biplane 23 lbs Plans $1700Partial Kit $13000 Sopwith Tripehound50 WWI Triplane 17 lbs Plans $1700Partial Kit $14000 Sopwitli Pup80 WWI Biplane16-17 lbs Plans $1700Partial Kit $13000 WACO UPF790 Biplane 23 lbsPlans $1700 Airplanes Landing Gear 2wire formed $995 hipping Assembled ready install $1996 hipping lWheel Pants models add $51 Cabanas$995 hipping Fokker Cabanas$1495 hipping HamSway Packageincludes famous Behrens strut system$1195PP Ordering information orders shipped UPS Par cel Post edd $3 shipping plans $10 kits Make checks payable Jerry Behrens fastest service send Postal Money Order bank check Sorry no CODs accepted Send mail orders BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 Phone 1212 3374957 Allow weeks delivery ists cut trailing edge stab free nd prop up Go easy trim though s angle shown plan nearly riinimum thats possible flying Moving ne weight forward will help prevent stalI ng also circle made small such 0 feet may necessary raise front f stab somewhat short motor model should tall little power off full ength motor will add weight forward educe eliminate stall As trim ning refined increased turns finally ry longer motors small fin added nose make turn tighter though model flew well model could probably lown left particularly flown ndoors under low ceiling low power s used ROG flying found large arking lots some supermarkets great et early dawn hours sir still vacant day aving such fun took flight hough light breeze sprung upyes vas weak thermal model landed s K-Man roof Later approached manager surprised showed no irritation went right up roof retrieve model turned out used build fly models Another time large dog walking small man spoke strong accent much interested model WW LI worked Willy Messerschmitt So sorts teresting things seem happen flying Variant case hobby shop doesnt stock parts models such Variant names addresses two mail order sup pliers Im sure Oldtimer Models PO Box 913 Westminster CA 92683 Peck-Polymers PO Box 2498 La Mesa CA 92041 CL Scale/Boss Continued paoe 72 probably contributed Les observations team selection contest open entry did make difference beginner expert under entry circumstances would no doubt see some unskilled modelers problems discussed commentary brings mind some basic ques tions right have completely open competition World Championship team selection Should entry vitation based past performance local National contests Should teamselection program result showcase event very best compete have thoughts matter drop line write National Association Scale Aeromodelers NASA John Guen ther President Box 714 RR #1 Borden IN 47106 Im sure comments will well-received could help NASA planning future Scale team selection pro grams Before closing item should AL-TEC PROdUCTS INC INTRODUCES NEW BUILDING CONCEPT unique ALISpARl&2 AL-T-SpAR 2 [patent pending] integral component uni-structure membered light weight Alum inum beam T spar Specially planned total model aircraft world mind STRONG easy use balsa foam wings tail planes Spar material Aluminum alloy 018 nominal thick ALISpAR1 • 8 az/ft 1/8x3/8 hollow flanges 7/8 overall height $200 per lineal ft sailable 2ft 3ff 4ft Only AlISpAR2 z/ft. 1/8 3/8 hollow flanges 1 3/ oa Ht $215 per ml ftl available in4 ft AL-joIMER 090 339 6 2024 T6 Aluminum $100 es TijoiNER Isee above AIjoiner dimensional grade 4 A/C titanium $100 eal AI-TSpars proportioned /z dimensions AIl-Spars Price length same AL-TEC Products Inc PO Box 3591 Boardman OH 44512 noted NASA sponsored ran years Scale team selection program first time completely independent func tion AMA event reports coming indicate NASA local Louisville clubs did excellent job Congratulations Finishing made easy Charles Bauer Norridge IL tells us following few simple steps too can greatly reduce effort required put finish Sport Scale model Charles flew fine-looking A6M2 Zero fighter see accompanying photos 1983 Nats con siderable amount rivet skin panel de tail finish modelers should able produce quite easily Rather using extensive applications balsa filler paint obtain good finish Zero Charles did minor amount grain-filling applied chrome MonoKote covering per instruc tions accompanying covering mateial After MonoKote covering com pleted skin panel outlines rivet patterns applied Skin panel outlines made scoring covering fine ball-point pen similar object Care should taken cut through covering flexible plastic ruler can used curved surfaces model keep panel lines straight Rivet markings made lightly pressing dressmakers pattern tracing wheel MonoKote surface right pressure experiment test pieces will produce indentation viewed distance several feet will look very much like flush rivets Once again flexible ruler used wheel held against producing straight lines rivets pattern tracing wheel know what is about inch diameter has teeth similar Send $100 Building Guide AI-Tec Product list deducted form 1st order gear usually mounted small plas tic handle can found stores sell sewing supplies little shopping around will turn up wheels varying num bers teeth making useful pro ducing patterns different rivet spacings rivet panel markings completed covering surface should rubbed lightly fine steel wool steel wool will provide finely-scratched surface better adherence expoxy-paint fin ish case Zero Charles used K&Bs Superpoxy Matched Finish System paints Another advantage using chrome MonoKote decide weather model aluminum color automatically shows through heavilyworn areas youre deciding finish next Sport Scale model might want try Charles Bauers time saving approach Something new time read item new version three-line bellcrank will available L-R Products Ltd new bellerank shortspan type approximately 2/2 between elevator line connection points same heavy-duty construction original G-S units major difference between new units original G-S units location elevator pushrod con nection much same old Roberts units new design allows unit mounted much smaller space larger G-S Units therefore suitable use smaller Scale models scale Class Carrier new L-R units come upright inverted mounting versions provide extra throttle control did G-S Units youre looking larger G-S units large Scale model too can obtained L-R Products Ltd data January 1984 171
Edition: Model Aviation - 1984/01
Page Numbers: 70, 71, 90, 91, 169, 170, 171
THE BOSTONIAN Ev ers like small spot easy build semiscale pable good flights small gyms event wingspan 16 ii three fuselage lengi diameter six ture must enclose v X l/ inches minin least two wheels meter fuselage two side windows ol area course powered As originated seven grams Mooney muci tise size 14 grams would b cially inexperi club Scale Statte conducted several con rule like heavier model quite strong can survive bang ing around Free Flight models likely experience tissue can shrunk doped producing attractive model models can flown indoors outdoors rules may seem very restrictive variety designs have resulted much creativity being utilized tried canard configuration several reasons rub ber motor can run full length fuse lage maximum use turns large side area fuselage box could located rearward providing fin action upper picture power rubber motor tapering off Variant begins slow descent landing An illusion seems taking place model doesnt come down steeply picture seems indi cate lower picture glide looks normal goes San Diegos Aero space Museum Model can flown outdoors wind down Fudo Takagi pictures moved about produce best trim plastic propeller used rather sheet balsa shown dead weight will have right nose Perhaps some additional weight over 14-gram total will required plastic props two three times heavier builtup type An experienced modeler could built Variant down seven-gram rule would entail use smaller wood sizes con denser tissue covering no dope V Most important canard good flying stable configuration Some years ago canards rare early-day airplanes tailfirst canard design including famous Wright Flyer followed dearth type until Burt Rutan repopularized canard composite designs As model tailfirst arrangement can produce outstand ing flier rubber-powered Vari ant attests fits Bostonian event rules can flown indoors outdoors Full-size plan pages 90-91 plans printed full size magazine model can built directly Some construction ideas will given modeler has made small stick-and-tissue models sulation board such Cellotex makes good construction surface Pins can stuck easily yet stiff flat Fuselage two sides built atop other matched pair results Care must taken angles wing stabilizer accurate according plans curved sections longerons Whether seen above below evident Variant has crisp pleasing lines Flying tail-first its also different run mill balsa prop made according text plan recommended plastic prop can used expect diminished performance January 1984 71 should pre-bent dont springsary way will have handle back change angleshold onto bending strips Soak Cut strips inch longer neces-Continued page 169 BEND TWO PIECES OF 1/32X 1/16TO FORM TIP STAB I H SPAR TAPERED 1 11 BREAK HERE F p B j STAB THIN METAL UBEARING AS 008 BRASS [-j*1 PROP SHAFT BEARING DETAIL 1/8 VERY/ HARD /8DISCliii I WIRE 41 [020 III I\ I II k 450BLADE ANGLE if' fi 1 - 1/32 It U 1Ij II 1I ACTUAL LONGERON LENGTH 0015WIRE SKID 1 / / BALSA / / I/ PROP JIG II I II i1iJIG FORMER Ii II Ii II ii iI Ii II II II II II Ii BALANC WITH DL 14 GRAM BOSTONIAN CMOAVL FULL SI / Ii I/I Text pages 70-7 1 IfiMEOIUM BALSA HARD BALSAS - DIHEDRAL--~ p I______ G ARE FLAT1 TIP DIHEDRAL 1/16 ALTUBE — -N II IIU III ELAGE TOP VIEWI/ III II/I E NNuI -- STAB MODEL FLIES ON 20 LOOP OF 5/32 3/16RUBBER NOSE FIN _______ ______N 25-----I 1/16 MEDIUMBALSA_ NOTE THIS ANGLEV CCESS HOLE RE TOR 1132 SHEET RIBS WHEELS MADE OF TWO 1/32DISCS CROSSORAIN NQ ment advance wound frantically order ready launch thermal peaked generally soggy conditions new Espada model become wet launched solid balsa wings started fluttering model dove ground breaking wing tips Without hesitation Doring reached spare model waiting state readiness Within two minutes spare wound launched its way convincing max Doring quite surprised little disbelieving learn already 1983 FlB Wakefield Rubber World Cham pion third person tory win two consecutive World Championships first place secured battle remaining positions start round Anzelmo second followed McGihivray Zhang Kilpelainen Zhang scored 161 sec Kilpelainen 146 showing event no means over Jack McGillivray changed models wet condi tions choosing covered Micafilm would waterpfoof managed 110 sec Meanwhile Gun ter Klemke Round 6 flight dropped him eighth scored rare 180 put him back running Steve Beebe could have caught up final flight 116 sec As place positions changed important flight yet made Anzelmo Zen under helpful guid ance Dutch Team Manager Peter De Boer stood alone line waiting launch Several good patches air passed bywith models appearing climb well overheadbut certain 20 mm remaining started rain again heavily Having held motor some consid erable time Zermi took opportunity change motors rewind event ually launched time running out climb good conditions moderate probably longest 180 sec Dutchman can remember Anzelmo Zen second As other scores came con firmed Gunther Klemke taken third Lothar Doring Ger man team instead flying individualiy Germans could have taken team prize too As Chinese team convincing winner having held top position throughout contest Italy held onto second place Great Britain having its best World Champs years third Variant/Mather Continued page 71 MORE COLOR 0 Ge ~Lr6 QO r0 0 \\e eS AO iron too hot Draw wet scrap pieces balsa across iron bending si multaneously Too much bending will course break wood Practice will teach much pressure can tolerated Much depends upon hardness grain wood Stubborn pieces can dipped water few draws Eventually wood should nearly conform plan curves rear fuselage built con tinuously up through motor tube will located Later part will cut away Note longerons actually longer appears direct side view because rear part fuselage bent sharply form point two jig formers big help proHOBBYPOXY PRODUCTS a division Pettit Paint Company Inc 10 Pine Street Box 378 Rockaway NJ 07866-0378 ducing accurate fuselage sim ply rectangular pieces sheet balsa cut fit between sides fuselage shown Form box two fuselage sides formers glue still soft set box over top view fuselage alignment can checked glue hardens notch inside longerons sharp bend oc curs Crack longerons bend fill notch will glue pin rear fuse lage together Check top view alignment again Cut front crosspieces glue place sides can held against crosspieces sliding bottle side glue set add crosspieces nose block landing gear etc January 1984 169 strips some scrap pieces water hour Allow soldering iron par tially heat up Test holding piece balsa against iron chars once slots wing stab left rec tangular until testing completed incidence changes can made necessary Remove jig formers Cut rectangular piece balsa motor tube should wide enough fit around form used /2-in drill shank works fine sheet can thinner 2 sand down thinner tube could smaller dia meter still carry rubber made ing tube could used protect fuselage during wind ing rubber Soak wood overnight water lash form narrow cloth strip old sheet Bake 2500 hour Glue seam cut V-slot tube fits over rear fuselage Pencil lightly around tube contacts fuselage Cut away part fuselage inside tube within / pencil mark Glue tube place Prop blades cut 2 sheet can sanded thinner also Soak water overnight lash large coffee can tips skewed about 150 left Bake hour 2500 prop spar should very hard balsa center should /o diameter spar tapered points center prop jig necessary us get blade angles correct Some modelers eye small sketch shows upright piece needed prop shaft 450 piece blade two vertical pieces glued base l/4 apart will give Il-in pitch Sharpen end prop shaft wire push through center prop sparbut glue yet Slot blades accept prop spar Glue blade spar glue still soft set pieces jig Hold wire shaft upright piece tape strip let blade lay against 450 sheet glue set complete other half motor tube plug made two discs /t balsa glued crossgrain smaller disc should snug fit motor tube larger disc overlaps tube holes prop shaft can punched through metal pins metal thin few pins may get bent over no small drill available pins will job Pins tapered hammer far enough shaft can spin freely side metal will have big burr put side against balsa gluing bearing plug Slide shaft through plug add small washer glass bead desired good glue shoulder prop shaft will suffice though Slide prop shaft through previously-made hole bend end shaft over Glue securely Build up glue shoulder inside prop hub applying several coats glue will form smooth fillet left itself wanted As coat begins harden use razor blade push glue down flat shoulder around shaft piece Ao-in 2-in aluminum tubing makes good anchor peg front rubber hole cut underside nose can see string motor Wing stab Make stabilizer edges spar hard balsa stab front likely take brunt collision forces Tapering spar gives added strength fuselage-stabilizer joint high-stress point tips bent like fuselage longerons ever made two laminations give added rigidity against pulling tissue Shape ribs siack rectangular pieces very much alike First cut rectangular pieces rib about A6 larger ribs Trace rib shape two pieces Stack pieces like deck cards two traced ribs outside Shape entire stack rib outline including notching spars Taper spar notch end other case stab Make center panels wing stab top spars place allowing spars extend /o beyond end rib Allow glue set thoroughly chance warping reduced Assemble tip sections spars Glue center sections tips propped up dihedral add spars making good fit ends spars center panels Check surfaces warps before covering present hold warped area jet steam twist opposite warp Cover model lightweight tissue water-shrink As tissue dries pin center panels flat surface resist warping Apply two thin coats dope two parts thinner part dope again protecting against warps steam treatment can remove warps covered surfaces also fuselage area above wing stab left uncovered until flight tests completed Flying Glue wing stab position lightly Check balance point add clay lead nose tail bring location shown plans original model flown right against tor que took several degrees right thrust shown plan end motor tube angled change thrust first tests make motor just long enough reach prop hook peg Such motor can easily wound hand quick testing Wind about 100 turns launch model level flight just couple feet off ground Unless serious errors made during con struction small corrections will nec essary diving tendency cut lead ing edge stab free prop up Thin strips cut IBM tab card work fine small changes model tends stall fly straight increase offset thrust tighten turn stalling per170 Model Aviation Tired Being Shot Down SUPER SERVO GARD Controls Throttle Cant * Constantly monitors receiver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smash-ups Endersed IMAAShew Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt Cut-Out Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negative pulse ordering RF Enterprises 106 N Main St Arlington OH 45814 419 365-5056 GIANT SCALE & SPORT PLANS SETS & KITS order contains concise construction manual Partial kits include precut wing ribs fuselage formers prebent lending gear already have pier sets may deduct 1000 prices partial kits listed below Fiberglass parts available no longer carry full kits J B Special MK 4 convertible 54~ Monoplane 75 Biplane Weighs 18 lbs Low Wing Biplane fr Parasol Plans $1700Plans $1700 Partial Kit $1500 EitherBoth Partial Kit $9500 Travel Air 2000 105 classic Scale Biplane Wt 23 lbs Plans $1700Partial Kit $13000 Travel Air 4000 99 Radial Eng classic Biplane 23 lbs Plans $1700Partial Kit $13000 Fokker 0-ViI 58 German WWI Rghter Biplane 23 lbs Plans $1700Partial Kit $13000 Sopwith Tripehound50 WWI Triplane 17 lbs Plans $1700Partial Kit $14000 Sopwitli Pup80 WWI Biplane16-17 lbs Plans $1700Partial Kit $13000 WACO UPF790 Biplane 23 lbsPlans $1700 Airplanes Landing Gear 2wire formed $995 hipping Assembled ready install $1996 hipping lWheel Pants models add $51 Cabanas$995 hipping Fokker Cabanas$1495 hipping HamSway Packageincludes famous Behrens strut system$1195PP Ordering information orders shipped UPS Par cel Post edd $3 shipping plans $10 kits Make checks payable Jerry Behrens fastest service send Postal Money Order bank check Sorry no CODs accepted Send mail orders BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 Phone 1212 3374957 Allow weeks delivery ists cut trailing edge stab free nd prop up Go easy trim though s angle shown plan nearly riinimum thats possible flying Moving ne weight forward will help prevent stalI ng also circle made small such 0 feet may necessary raise front f stab somewhat short motor model should tall little power off full ength motor will add weight forward educe eliminate stall As trim ning refined increased turns finally ry longer motors small fin added nose make turn tighter though model flew well model could probably lown left particularly flown ndoors under low ceiling low power s used ROG flying found large arking lots some supermarkets great et early dawn hours sir still vacant day aving such fun took flight hough light breeze sprung upyes vas weak thermal model landed s K-Man roof Later approached manager surprised showed no irritation went right up roof retrieve model turned out used build fly models Another time large dog walking small man spoke strong accent much interested model WW LI worked Willy Messerschmitt So sorts teresting things seem happen flying Variant case hobby shop doesnt stock parts models such Variant names addresses two mail order sup pliers Im sure Oldtimer Models PO Box 913 Westminster CA 92683 Peck-Polymers PO Box 2498 La Mesa CA 92041 CL Scale/Boss Continued paoe 72 probably contributed Les observations team selection contest open entry did make difference beginner expert under entry circumstances would no doubt see some unskilled modelers problems discussed commentary brings mind some basic ques tions right have completely open competition World Championship team selection Should entry vitation based past performance local National contests Should teamselection program result showcase event very best compete have thoughts matter drop line write National Association Scale Aeromodelers NASA John Guen ther President Box 714 RR #1 Borden IN 47106 Im sure comments will well-received could help NASA planning future Scale team selection pro grams Before closing item should AL-TEC PROdUCTS INC INTRODUCES NEW BUILDING CONCEPT unique ALISpARl&2 AL-T-SpAR 2 [patent pending] integral component uni-structure membered light weight Alum inum beam T spar Specially planned total model aircraft world mind STRONG easy use balsa foam wings tail planes Spar material Aluminum alloy 018 nominal thick ALISpAR1 • 8 az/ft 1/8x3/8 hollow flanges 7/8 overall height $200 per lineal ft sailable 2ft 3ff 4ft Only AlISpAR2 z/ft. 1/8 3/8 hollow flanges 1 3/ oa Ht $215 per ml ftl available in4 ft AL-joIMER 090 339 6 2024 T6 Aluminum $100 es TijoiNER Isee above AIjoiner dimensional grade 4 A/C titanium $100 eal AI-TSpars proportioned /z dimensions AIl-Spars Price length same AL-TEC Products Inc PO Box 3591 Boardman OH 44512 noted NASA sponsored ran years Scale team selection program first time completely independent func tion AMA event reports coming indicate NASA local Louisville clubs did excellent job Congratulations Finishing made easy Charles Bauer Norridge IL tells us following few simple steps too can greatly reduce effort required put finish Sport Scale model Charles flew fine-looking A6M2 Zero fighter see accompanying photos 1983 Nats con siderable amount rivet skin panel de tail finish modelers should able produce quite easily Rather using extensive applications balsa filler paint obtain good finish Zero Charles did minor amount grain-filling applied chrome MonoKote covering per instruc tions accompanying covering mateial After MonoKote covering com pleted skin panel outlines rivet patterns applied Skin panel outlines made scoring covering fine ball-point pen similar object Care should taken cut through covering flexible plastic ruler can used curved surfaces model keep panel lines straight Rivet markings made lightly pressing dressmakers pattern tracing wheel MonoKote surface right pressure experiment test pieces will produce indentation viewed distance several feet will look very much like flush rivets Once again flexible ruler used wheel held against producing straight lines rivets pattern tracing wheel know what is about inch diameter has teeth similar Send $100 Building Guide AI-Tec Product list deducted form 1st order gear usually mounted small plas tic handle can found stores sell sewing supplies little shopping around will turn up wheels varying num bers teeth making useful pro ducing patterns different rivet spacings rivet panel markings completed covering surface should rubbed lightly fine steel wool steel wool will provide finely-scratched surface better adherence expoxy-paint fin ish case Zero Charles used K&Bs Superpoxy Matched Finish System paints Another advantage using chrome MonoKote decide weather model aluminum color automatically shows through heavilyworn areas youre deciding finish next Sport Scale model might want try Charles Bauers time saving approach Something new time read item new version three-line bellcrank will available L-R Products Ltd new bellerank shortspan type approximately 2/2 between elevator line connection points same heavy-duty construction original G-S units major difference between new units original G-S units location elevator pushrod con nection much same old Roberts units new design allows unit mounted much smaller space larger G-S Units therefore suitable use smaller Scale models scale Class Carrier new L-R units come upright inverted mounting versions provide extra throttle control did G-S Units youre looking larger G-S units large Scale model too can obtained L-R Products Ltd data January 1984 171
Edition: Model Aviation - 1984/01
Page Numbers: 70, 71, 90, 91, 169, 170, 171
THE BOSTONIAN Ev ers like small spot easy build semiscale pable good flights small gyms event wingspan 16 ii three fuselage lengi diameter six ture must enclose v X l/ inches minin least two wheels meter fuselage two side windows ol area course powered As originated seven grams Mooney muci tise size 14 grams would b cially inexperi club Scale Statte conducted several con rule like heavier model quite strong can survive bang ing around Free Flight models likely experience tissue can shrunk doped producing attractive model models can flown indoors outdoors rules may seem very restrictive variety designs have resulted much creativity being utilized tried canard configuration several reasons rub ber motor can run full length fuse lage maximum use turns large side area fuselage box could located rearward providing fin action upper picture power rubber motor tapering off Variant begins slow descent landing An illusion seems taking place model doesnt come down steeply picture seems indi cate lower picture glide looks normal goes San Diegos Aero space Museum Model can flown outdoors wind down Fudo Takagi pictures moved about produce best trim plastic propeller used rather sheet balsa shown dead weight will have right nose Perhaps some additional weight over 14-gram total will required plastic props two three times heavier builtup type An experienced modeler could built Variant down seven-gram rule would entail use smaller wood sizes con denser tissue covering no dope V Most important canard good flying stable configuration Some years ago canards rare early-day airplanes tailfirst canard design including famous Wright Flyer followed dearth type until Burt Rutan repopularized canard composite designs As model tailfirst arrangement can produce outstand ing flier rubber-powered Vari ant attests fits Bostonian event rules can flown indoors outdoors Full-size plan pages 90-91 plans printed full size magazine model can built directly Some construction ideas will given modeler has made small stick-and-tissue models sulation board such Cellotex makes good construction surface Pins can stuck easily yet stiff flat Fuselage two sides built atop other matched pair results Care must taken angles wing stabilizer accurate according plans curved sections longerons Whether seen above below evident Variant has crisp pleasing lines Flying tail-first its also different run mill balsa prop made according text plan recommended plastic prop can used expect diminished performance January 1984 71 should pre-bent dont springsary way will have handle back change angleshold onto bending strips Soak Cut strips inch longer neces-Continued page 169 BEND TWO PIECES OF 1/32X 1/16TO FORM TIP STAB I H SPAR TAPERED 1 11 BREAK HERE F p B j STAB THIN METAL UBEARING AS 008 BRASS [-j*1 PROP SHAFT BEARING DETAIL 1/8 VERY/ HARD /8DISCliii I WIRE 41 [020 III I\ I II k 450BLADE ANGLE if' fi 1 - 1/32 It U 1Ij II 1I ACTUAL LONGERON LENGTH 0015WIRE SKID 1 / / BALSA / / I/ PROP JIG II I II i1iJIG FORMER Ii II Ii II ii iI Ii II II II II II Ii BALANC WITH DL 14 GRAM BOSTONIAN CMOAVL FULL SI / Ii I/I Text pages 70-7 1 IfiMEOIUM BALSA HARD BALSAS - DIHEDRAL--~ p I______ G ARE FLAT1 TIP DIHEDRAL 1/16 ALTUBE — -N II IIU III ELAGE TOP VIEWI/ III II/I E NNuI -- STAB MODEL FLIES ON 20 LOOP OF 5/32 3/16RUBBER NOSE FIN _______ ______N 25-----I 1/16 MEDIUMBALSA_ NOTE THIS ANGLEV CCESS HOLE RE TOR 1132 SHEET RIBS WHEELS MADE OF TWO 1/32DISCS CROSSORAIN NQ ment advance wound frantically order ready launch thermal peaked generally soggy conditions new Espada model become wet launched solid balsa wings started fluttering model dove ground breaking wing tips Without hesitation Doring reached spare model waiting state readiness Within two minutes spare wound launched its way convincing max Doring quite surprised little disbelieving learn already 1983 FlB Wakefield Rubber World Cham pion third person tory win two consecutive World Championships first place secured battle remaining positions start round Anzelmo second followed McGihivray Zhang Kilpelainen Zhang scored 161 sec Kilpelainen 146 showing event no means over Jack McGillivray changed models wet condi tions choosing covered Micafilm would waterpfoof managed 110 sec Meanwhile Gun ter Klemke Round 6 flight dropped him eighth scored rare 180 put him back running Steve Beebe could have caught up final flight 116 sec As place positions changed important flight yet made Anzelmo Zen under helpful guid ance Dutch Team Manager Peter De Boer stood alone line waiting launch Several good patches air passed bywith models appearing climb well overheadbut certain 20 mm remaining started rain again heavily Having held motor some consid erable time Zermi took opportunity change motors rewind event ually launched time running out climb good conditions moderate probably longest 180 sec Dutchman can remember Anzelmo Zen second As other scores came con firmed Gunther Klemke taken third Lothar Doring Ger man team instead flying individualiy Germans could have taken team prize too As Chinese team convincing winner having held top position throughout contest Italy held onto second place Great Britain having its best World Champs years third Variant/Mather Continued page 71 MORE COLOR 0 Ge ~Lr6 QO r0 0 \\e eS AO iron too hot Draw wet scrap pieces balsa across iron bending si multaneously Too much bending will course break wood Practice will teach much pressure can tolerated Much depends upon hardness grain wood Stubborn pieces can dipped water few draws Eventually wood should nearly conform plan curves rear fuselage built con tinuously up through motor tube will located Later part will cut away Note longerons actually longer appears direct side view because rear part fuselage bent sharply form point two jig formers big help proHOBBYPOXY PRODUCTS a division Pettit Paint Company Inc 10 Pine Street Box 378 Rockaway NJ 07866-0378 ducing accurate fuselage sim ply rectangular pieces sheet balsa cut fit between sides fuselage shown Form box two fuselage sides formers glue still soft set box over top view fuselage alignment can checked glue hardens notch inside longerons sharp bend oc curs Crack longerons bend fill notch will glue pin rear fuse lage together Check top view alignment again Cut front crosspieces glue place sides can held against crosspieces sliding bottle side glue set add crosspieces nose block landing gear etc January 1984 169 strips some scrap pieces water hour Allow soldering iron par tially heat up Test holding piece balsa against iron chars once slots wing stab left rec tangular until testing completed incidence changes can made necessary Remove jig formers Cut rectangular piece balsa motor tube should wide enough fit around form used /2-in drill shank works fine sheet can thinner 2 sand down thinner tube could smaller dia meter still carry rubber made ing tube could used protect fuselage during wind ing rubber Soak wood overnight water lash form narrow cloth strip old sheet Bake 2500 hour Glue seam cut V-slot tube fits over rear fuselage Pencil lightly around tube contacts fuselage Cut away part fuselage inside tube within / pencil mark Glue tube place Prop blades cut 2 sheet can sanded thinner also Soak water overnight lash large coffee can tips skewed about 150 left Bake hour 2500 prop spar should very hard balsa center should /o diameter spar tapered points center prop jig necessary us get blade angles correct Some modelers eye small sketch shows upright piece needed prop shaft 450 piece blade two vertical pieces glued base l/4 apart will give Il-in pitch Sharpen end prop shaft wire push through center prop sparbut glue yet Slot blades accept prop spar Glue blade spar glue still soft set pieces jig Hold wire shaft upright piece tape strip let blade lay against 450 sheet glue set complete other half motor tube plug made two discs /t balsa glued crossgrain smaller disc should snug fit motor tube larger disc overlaps tube holes prop shaft can punched through metal pins metal thin few pins may get bent over no small drill available pins will job Pins tapered hammer far enough shaft can spin freely side metal will have big burr put side against balsa gluing bearing plug Slide shaft through plug add small washer glass bead desired good glue shoulder prop shaft will suffice though Slide prop shaft through previously-made hole bend end shaft over Glue securely Build up glue shoulder inside prop hub applying several coats glue will form smooth fillet left itself wanted As coat begins harden use razor blade push glue down flat shoulder around shaft piece Ao-in 2-in aluminum tubing makes good anchor peg front rubber hole cut underside nose can see string motor Wing stab Make stabilizer edges spar hard balsa stab front likely take brunt collision forces Tapering spar gives added strength fuselage-stabilizer joint high-stress point tips bent like fuselage longerons ever made two laminations give added rigidity against pulling tissue Shape ribs siack rectangular pieces very much alike First cut rectangular pieces rib about A6 larger ribs Trace rib shape two pieces Stack pieces like deck cards two traced ribs outside Shape entire stack rib outline including notching spars Taper spar notch end other case stab Make center panels wing stab top spars place allowing spars extend /o beyond end rib Allow glue set thoroughly chance warping reduced Assemble tip sections spars Glue center sections tips propped up dihedral add spars making good fit ends spars center panels Check surfaces warps before covering present hold warped area jet steam twist opposite warp Cover model lightweight tissue water-shrink As tissue dries pin center panels flat surface resist warping Apply two thin coats dope two parts thinner part dope again protecting against warps steam treatment can remove warps covered surfaces also fuselage area above wing stab left uncovered until flight tests completed Flying Glue wing stab position lightly Check balance point add clay lead nose tail bring location shown plans original model flown right against tor que took several degrees right thrust shown plan end motor tube angled change thrust first tests make motor just long enough reach prop hook peg Such motor can easily wound hand quick testing Wind about 100 turns launch model level flight just couple feet off ground Unless serious errors made during con struction small corrections will nec essary diving tendency cut lead ing edge stab free prop up Thin strips cut IBM tab card work fine small changes model tends stall fly straight increase offset thrust tighten turn stalling per170 Model Aviation Tired Being Shot Down SUPER SERVO GARD Controls Throttle Cant * Constantly monitors receiver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smash-ups Endersed IMAAShew Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt Cut-Out Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negative pulse ordering RF Enterprises 106 N Main St Arlington OH 45814 419 365-5056 GIANT SCALE & SPORT PLANS SETS & KITS order contains concise construction manual Partial kits include precut wing ribs fuselage formers prebent lending gear already have pier sets may deduct 1000 prices partial kits listed below Fiberglass parts available no longer carry full kits J B Special MK 4 convertible 54~ Monoplane 75 Biplane Weighs 18 lbs Low Wing Biplane fr Parasol Plans $1700Plans $1700 Partial Kit $1500 EitherBoth Partial Kit $9500 Travel Air 2000 105 classic Scale Biplane Wt 23 lbs Plans $1700Partial Kit $13000 Travel Air 4000 99 Radial Eng classic Biplane 23 lbs Plans $1700Partial Kit $13000 Fokker 0-ViI 58 German WWI Rghter Biplane 23 lbs Plans $1700Partial Kit $13000 Sopwith Tripehound50 WWI Triplane 17 lbs Plans $1700Partial Kit $14000 Sopwitli Pup80 WWI Biplane16-17 lbs Plans $1700Partial Kit $13000 WACO UPF790 Biplane 23 lbsPlans $1700 Airplanes Landing Gear 2wire formed $995 hipping Assembled ready install $1996 hipping lWheel Pants models add $51 Cabanas$995 hipping Fokker Cabanas$1495 hipping HamSway Packageincludes famous Behrens strut system$1195PP Ordering information orders shipped UPS Par cel Post edd $3 shipping plans $10 kits Make checks payable Jerry Behrens fastest service send Postal Money Order bank check Sorry no CODs accepted Send mail orders BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 Phone 1212 3374957 Allow weeks delivery ists cut trailing edge stab free nd prop up Go easy trim though s angle shown plan nearly riinimum thats possible flying Moving ne weight forward will help prevent stalI ng also circle made small such 0 feet may necessary raise front f stab somewhat short motor model should tall little power off full ength motor will add weight forward educe eliminate stall As trim ning refined increased turns finally ry longer motors small fin added nose make turn tighter though model flew well model could probably lown left particularly flown ndoors under low ceiling low power s used ROG flying found large arking lots some supermarkets great et early dawn hours sir still vacant day aving such fun took flight hough light breeze sprung upyes vas weak thermal model landed s K-Man roof Later approached manager surprised showed no irritation went right up roof retrieve model turned out used build fly models Another time large dog walking small man spoke strong accent much interested model WW LI worked Willy Messerschmitt So sorts teresting things seem happen flying Variant case hobby shop doesnt stock parts models such Variant names addresses two mail order sup pliers Im sure Oldtimer Models PO Box 913 Westminster CA 92683 Peck-Polymers PO Box 2498 La Mesa CA 92041 CL Scale/Boss Continued paoe 72 probably contributed Les observations team selection contest open entry did make difference beginner expert under entry circumstances would no doubt see some unskilled modelers problems discussed commentary brings mind some basic ques tions right have completely open competition World Championship team selection Should entry vitation based past performance local National contests Should teamselection program result showcase event very best compete have thoughts matter drop line write National Association Scale Aeromodelers NASA John Guen ther President Box 714 RR #1 Borden IN 47106 Im sure comments will well-received could help NASA planning future Scale team selection pro grams Before closing item should AL-TEC PROdUCTS INC INTRODUCES NEW BUILDING CONCEPT unique ALISpARl&2 AL-T-SpAR 2 [patent pending] integral component uni-structure membered light weight Alum inum beam T spar Specially planned total model aircraft world mind STRONG easy use balsa foam wings tail planes Spar material Aluminum alloy 018 nominal thick ALISpAR1 • 8 az/ft 1/8x3/8 hollow flanges 7/8 overall height $200 per lineal ft sailable 2ft 3ff 4ft Only AlISpAR2 z/ft. 1/8 3/8 hollow flanges 1 3/ oa Ht $215 per ml ftl available in4 ft AL-joIMER 090 339 6 2024 T6 Aluminum $100 es TijoiNER Isee above AIjoiner dimensional grade 4 A/C titanium $100 eal AI-TSpars proportioned /z dimensions AIl-Spars Price length same AL-TEC Products Inc PO Box 3591 Boardman OH 44512 noted NASA sponsored ran years Scale team selection program first time completely independent func tion AMA event reports coming indicate NASA local Louisville clubs did excellent job Congratulations Finishing made easy Charles Bauer Norridge IL tells us following few simple steps too can greatly reduce effort required put finish Sport Scale model Charles flew fine-looking A6M2 Zero fighter see accompanying photos 1983 Nats con siderable amount rivet skin panel de tail finish modelers should able produce quite easily Rather using extensive applications balsa filler paint obtain good finish Zero Charles did minor amount grain-filling applied chrome MonoKote covering per instruc tions accompanying covering mateial After MonoKote covering com pleted skin panel outlines rivet patterns applied Skin panel outlines made scoring covering fine ball-point pen similar object Care should taken cut through covering flexible plastic ruler can used curved surfaces model keep panel lines straight Rivet markings made lightly pressing dressmakers pattern tracing wheel MonoKote surface right pressure experiment test pieces will produce indentation viewed distance several feet will look very much like flush rivets Once again flexible ruler used wheel held against producing straight lines rivets pattern tracing wheel know what is about inch diameter has teeth similar Send $100 Building Guide AI-Tec Product list deducted form 1st order gear usually mounted small plas tic handle can found stores sell sewing supplies little shopping around will turn up wheels varying num bers teeth making useful pro ducing patterns different rivet spacings rivet panel markings completed covering surface should rubbed lightly fine steel wool steel wool will provide finely-scratched surface better adherence expoxy-paint fin ish case Zero Charles used K&Bs Superpoxy Matched Finish System paints Another advantage using chrome MonoKote decide weather model aluminum color automatically shows through heavilyworn areas youre deciding finish next Sport Scale model might want try Charles Bauers time saving approach Something new time read item new version three-line bellcrank will available L-R Products Ltd new bellerank shortspan type approximately 2/2 between elevator line connection points same heavy-duty construction original G-S units major difference between new units original G-S units location elevator pushrod con nection much same old Roberts units new design allows unit mounted much smaller space larger G-S Units therefore suitable use smaller Scale models scale Class Carrier new L-R units come upright inverted mounting versions provide extra throttle control did G-S Units youre looking larger G-S units large Scale model too can obtained L-R Products Ltd data January 1984 171
Edition: Model Aviation - 1984/01
Page Numbers: 70, 71, 90, 91, 169, 170, 171
THE BOSTONIAN Ev ers like small spot easy build semiscale pable good flights small gyms event wingspan 16 ii three fuselage lengi diameter six ture must enclose v X l/ inches minin least two wheels meter fuselage two side windows ol area course powered As originated seven grams Mooney muci tise size 14 grams would b cially inexperi club Scale Statte conducted several con rule like heavier model quite strong can survive bang ing around Free Flight models likely experience tissue can shrunk doped producing attractive model models can flown indoors outdoors rules may seem very restrictive variety designs have resulted much creativity being utilized tried canard configuration several reasons rub ber motor can run full length fuse lage maximum use turns large side area fuselage box could located rearward providing fin action upper picture power rubber motor tapering off Variant begins slow descent landing An illusion seems taking place model doesnt come down steeply picture seems indi cate lower picture glide looks normal goes San Diegos Aero space Museum Model can flown outdoors wind down Fudo Takagi pictures moved about produce best trim plastic propeller used rather sheet balsa shown dead weight will have right nose Perhaps some additional weight over 14-gram total will required plastic props two three times heavier builtup type An experienced modeler could built Variant down seven-gram rule would entail use smaller wood sizes con denser tissue covering no dope V Most important canard good flying stable configuration Some years ago canards rare early-day airplanes tailfirst canard design including famous Wright Flyer followed dearth type until Burt Rutan repopularized canard composite designs As model tailfirst arrangement can produce outstand ing flier rubber-powered Vari ant attests fits Bostonian event rules can flown indoors outdoors Full-size plan pages 90-91 plans printed full size magazine model can built directly Some construction ideas will given modeler has made small stick-and-tissue models sulation board such Cellotex makes good construction surface Pins can stuck easily yet stiff flat Fuselage two sides built atop other matched pair results Care must taken angles wing stabilizer accurate according plans curved sections longerons Whether seen above below evident Variant has crisp pleasing lines Flying tail-first its also different run mill balsa prop made according text plan recommended plastic prop can used expect diminished performance January 1984 71 should pre-bent dont springsary way will have handle back change angleshold onto bending strips Soak Cut strips inch longer neces-Continued page 169 BEND TWO PIECES OF 1/32X 1/16TO FORM TIP STAB I H SPAR TAPERED 1 11 BREAK HERE F p B j STAB THIN METAL UBEARING AS 008 BRASS [-j*1 PROP SHAFT BEARING DETAIL 1/8 VERY/ HARD /8DISCliii I WIRE 41 [020 III I\ I II k 450BLADE ANGLE if' fi 1 - 1/32 It U 1Ij II 1I ACTUAL LONGERON LENGTH 0015WIRE SKID 1 / / BALSA / / I/ PROP JIG II I II i1iJIG FORMER Ii II Ii II ii iI Ii II II II II II Ii BALANC WITH DL 14 GRAM BOSTONIAN CMOAVL FULL SI / Ii I/I Text pages 70-7 1 IfiMEOIUM BALSA HARD BALSAS - DIHEDRAL--~ p I______ G ARE FLAT1 TIP DIHEDRAL 1/16 ALTUBE — -N II IIU III ELAGE TOP VIEWI/ III II/I E NNuI -- STAB MODEL FLIES ON 20 LOOP OF 5/32 3/16RUBBER NOSE FIN _______ ______N 25-----I 1/16 MEDIUMBALSA_ NOTE THIS ANGLEV CCESS HOLE RE TOR 1132 SHEET RIBS WHEELS MADE OF TWO 1/32DISCS CROSSORAIN NQ ment advance wound frantically order ready launch thermal peaked generally soggy conditions new Espada model become wet launched solid balsa wings started fluttering model dove ground breaking wing tips Without hesitation Doring reached spare model waiting state readiness Within two minutes spare wound launched its way convincing max Doring quite surprised little disbelieving learn already 1983 FlB Wakefield Rubber World Cham pion third person tory win two consecutive World Championships first place secured battle remaining positions start round Anzelmo second followed McGihivray Zhang Kilpelainen Zhang scored 161 sec Kilpelainen 146 showing event no means over Jack McGillivray changed models wet condi tions choosing covered Micafilm would waterpfoof managed 110 sec Meanwhile Gun ter Klemke Round 6 flight dropped him eighth scored rare 180 put him back running Steve Beebe could have caught up final flight 116 sec As place positions changed important flight yet made Anzelmo Zen under helpful guid ance Dutch Team Manager Peter De Boer stood alone line waiting launch Several good patches air passed bywith models appearing climb well overheadbut certain 20 mm remaining started rain again heavily Having held motor some consid erable time Zermi took opportunity change motors rewind event ually launched time running out climb good conditions moderate probably longest 180 sec Dutchman can remember Anzelmo Zen second As other scores came con firmed Gunther Klemke taken third Lothar Doring Ger man team instead flying individualiy Germans could have taken team prize too As Chinese team convincing winner having held top position throughout contest Italy held onto second place Great Britain having its best World Champs years third Variant/Mather Continued page 71 MORE COLOR 0 Ge ~Lr6 QO r0 0 \\e eS AO iron too hot Draw wet scrap pieces balsa across iron bending si multaneously Too much bending will course break wood Practice will teach much pressure can tolerated Much depends upon hardness grain wood Stubborn pieces can dipped water few draws Eventually wood should nearly conform plan curves rear fuselage built con tinuously up through motor tube will located Later part will cut away Note longerons actually longer appears direct side view because rear part fuselage bent sharply form point two jig formers big help proHOBBYPOXY PRODUCTS a division Pettit Paint Company Inc 10 Pine Street Box 378 Rockaway NJ 07866-0378 ducing accurate fuselage sim ply rectangular pieces sheet balsa cut fit between sides fuselage shown Form box two fuselage sides formers glue still soft set box over top view fuselage alignment can checked glue hardens notch inside longerons sharp bend oc curs Crack longerons bend fill notch will glue pin rear fuse lage together Check top view alignment again Cut front crosspieces glue place sides can held against crosspieces sliding bottle side glue set add crosspieces nose block landing gear etc January 1984 169 strips some scrap pieces water hour Allow soldering iron par tially heat up Test holding piece balsa against iron chars once slots wing stab left rec tangular until testing completed incidence changes can made necessary Remove jig formers Cut rectangular piece balsa motor tube should wide enough fit around form used /2-in drill shank works fine sheet can thinner 2 sand down thinner tube could smaller dia meter still carry rubber made ing tube could used protect fuselage during wind ing rubber Soak wood overnight water lash form narrow cloth strip old sheet Bake 2500 hour Glue seam cut V-slot tube fits over rear fuselage Pencil lightly around tube contacts fuselage Cut away part fuselage inside tube within / pencil mark Glue tube place Prop blades cut 2 sheet can sanded thinner also Soak water overnight lash large coffee can tips skewed about 150 left Bake hour 2500 prop spar should very hard balsa center should /o diameter spar tapered points center prop jig necessary us get blade angles correct Some modelers eye small sketch shows upright piece needed prop shaft 450 piece blade two vertical pieces glued base l/4 apart will give Il-in pitch Sharpen end prop shaft wire push through center prop sparbut glue yet Slot blades accept prop spar Glue blade spar glue still soft set pieces jig Hold wire shaft upright piece tape strip let blade lay against 450 sheet glue set complete other half motor tube plug made two discs /t balsa glued crossgrain smaller disc should snug fit motor tube larger disc overlaps tube holes prop shaft can punched through metal pins metal thin few pins may get bent over no small drill available pins will job Pins tapered hammer far enough shaft can spin freely side metal will have big burr put side against balsa gluing bearing plug Slide shaft through plug add small washer glass bead desired good glue shoulder prop shaft will suffice though Slide prop shaft through previously-made hole bend end shaft over Glue securely Build up glue shoulder inside prop hub applying several coats glue will form smooth fillet left itself wanted As coat begins harden use razor blade push glue down flat shoulder around shaft piece Ao-in 2-in aluminum tubing makes good anchor peg front rubber hole cut underside nose can see string motor Wing stab Make stabilizer edges spar hard balsa stab front likely take brunt collision forces Tapering spar gives added strength fuselage-stabilizer joint high-stress point tips bent like fuselage longerons ever made two laminations give added rigidity against pulling tissue Shape ribs siack rectangular pieces very much alike First cut rectangular pieces rib about A6 larger ribs Trace rib shape two pieces Stack pieces like deck cards two traced ribs outside Shape entire stack rib outline including notching spars Taper spar notch end other case stab Make center panels wing stab top spars place allowing spars extend /o beyond end rib Allow glue set thoroughly chance warping reduced Assemble tip sections spars Glue center sections tips propped up dihedral add spars making good fit ends spars center panels Check surfaces warps before covering present hold warped area jet steam twist opposite warp Cover model lightweight tissue water-shrink As tissue dries pin center panels flat surface resist warping Apply two thin coats dope two parts thinner part dope again protecting against warps steam treatment can remove warps covered surfaces also fuselage area above wing stab left uncovered until flight tests completed Flying Glue wing stab position lightly Check balance point add clay lead nose tail bring location shown plans original model flown right against tor que took several degrees right thrust shown plan end motor tube angled change thrust first tests make motor just long enough reach prop hook peg Such motor can easily wound hand quick testing Wind about 100 turns launch model level flight just couple feet off ground Unless serious errors made during con struction small corrections will nec essary diving tendency cut lead ing edge stab free prop up Thin strips cut IBM tab card work fine small changes model tends stall fly straight increase offset thrust tighten turn stalling per170 Model Aviation Tired Being Shot Down SUPER SERVO GARD Controls Throttle Cant * Constantly monitors receiver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smash-ups Endersed IMAAShew Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt Cut-Out Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negative pulse ordering RF Enterprises 106 N Main St Arlington OH 45814 419 365-5056 GIANT SCALE & SPORT PLANS SETS & KITS order contains concise construction manual Partial kits include precut wing ribs fuselage formers prebent lending gear already have pier sets may deduct 1000 prices partial kits listed below Fiberglass parts available no longer carry full kits J B Special MK 4 convertible 54~ Monoplane 75 Biplane Weighs 18 lbs Low Wing Biplane fr Parasol Plans $1700Plans $1700 Partial Kit $1500 EitherBoth Partial Kit $9500 Travel Air 2000 105 classic Scale Biplane Wt 23 lbs Plans $1700Partial Kit $13000 Travel Air 4000 99 Radial Eng classic Biplane 23 lbs Plans $1700Partial Kit $13000 Fokker 0-ViI 58 German WWI Rghter Biplane 23 lbs Plans $1700Partial Kit $13000 Sopwith Tripehound50 WWI Triplane 17 lbs Plans $1700Partial Kit $14000 Sopwitli Pup80 WWI Biplane16-17 lbs Plans $1700Partial Kit $13000 WACO UPF790 Biplane 23 lbsPlans $1700 Airplanes Landing Gear 2wire formed $995 hipping Assembled ready install $1996 hipping lWheel Pants models add $51 Cabanas$995 hipping Fokker Cabanas$1495 hipping HamSway Packageincludes famous Behrens strut system$1195PP Ordering information orders shipped UPS Par cel Post edd $3 shipping plans $10 kits Make checks payable Jerry Behrens fastest service send Postal Money Order bank check Sorry no CODs accepted Send mail orders BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 Phone 1212 3374957 Allow weeks delivery ists cut trailing edge stab free nd prop up Go easy trim though s angle shown plan nearly riinimum thats possible flying Moving ne weight forward will help prevent stalI ng also circle made small such 0 feet may necessary raise front f stab somewhat short motor model should tall little power off full ength motor will add weight forward educe eliminate stall As trim ning refined increased turns finally ry longer motors small fin added nose make turn tighter though model flew well model could probably lown left particularly flown ndoors under low ceiling low power s used ROG flying found large arking lots some supermarkets great et early dawn hours sir still vacant day aving such fun took flight hough light breeze sprung upyes vas weak thermal model landed s K-Man roof Later approached manager surprised showed no irritation went right up roof retrieve model turned out used build fly models Another time large dog walking small man spoke strong accent much interested model WW LI worked Willy Messerschmitt So sorts teresting things seem happen flying Variant case hobby shop doesnt stock parts models such Variant names addresses two mail order sup pliers Im sure Oldtimer Models PO Box 913 Westminster CA 92683 Peck-Polymers PO Box 2498 La Mesa CA 92041 CL Scale/Boss Continued paoe 72 probably contributed Les observations team selection contest open entry did make difference beginner expert under entry circumstances would no doubt see some unskilled modelers problems discussed commentary brings mind some basic ques tions right have completely open competition World Championship team selection Should entry vitation based past performance local National contests Should teamselection program result showcase event very best compete have thoughts matter drop line write National Association Scale Aeromodelers NASA John Guen ther President Box 714 RR #1 Borden IN 47106 Im sure comments will well-received could help NASA planning future Scale team selection pro grams Before closing item should AL-TEC PROdUCTS INC INTRODUCES NEW BUILDING CONCEPT unique ALISpARl&2 AL-T-SpAR 2 [patent pending] integral component uni-structure membered light weight Alum inum beam T spar Specially planned total model aircraft world mind STRONG easy use balsa foam wings tail planes Spar material Aluminum alloy 018 nominal thick ALISpAR1 • 8 az/ft 1/8x3/8 hollow flanges 7/8 overall height $200 per lineal ft sailable 2ft 3ff 4ft Only AlISpAR2 z/ft. 1/8 3/8 hollow flanges 1 3/ oa Ht $215 per ml ftl available in4 ft AL-joIMER 090 339 6 2024 T6 Aluminum $100 es TijoiNER Isee above AIjoiner dimensional grade 4 A/C titanium $100 eal AI-TSpars proportioned /z dimensions AIl-Spars Price length same AL-TEC Products Inc PO Box 3591 Boardman OH 44512 noted NASA sponsored ran years Scale team selection program first time completely independent func tion AMA event reports coming indicate NASA local Louisville clubs did excellent job Congratulations Finishing made easy Charles Bauer Norridge IL tells us following few simple steps too can greatly reduce effort required put finish Sport Scale model Charles flew fine-looking A6M2 Zero fighter see accompanying photos 1983 Nats con siderable amount rivet skin panel de tail finish modelers should able produce quite easily Rather using extensive applications balsa filler paint obtain good finish Zero Charles did minor amount grain-filling applied chrome MonoKote covering per instruc tions accompanying covering mateial After MonoKote covering com pleted skin panel outlines rivet patterns applied Skin panel outlines made scoring covering fine ball-point pen similar object Care should taken cut through covering flexible plastic ruler can used curved surfaces model keep panel lines straight Rivet markings made lightly pressing dressmakers pattern tracing wheel MonoKote surface right pressure experiment test pieces will produce indentation viewed distance several feet will look very much like flush rivets Once again flexible ruler used wheel held against producing straight lines rivets pattern tracing wheel know what is about inch diameter has teeth similar Send $100 Building Guide AI-Tec Product list deducted form 1st order gear usually mounted small plas tic handle can found stores sell sewing supplies little shopping around will turn up wheels varying num bers teeth making useful pro ducing patterns different rivet spacings rivet panel markings completed covering surface should rubbed lightly fine steel wool steel wool will provide finely-scratched surface better adherence expoxy-paint fin ish case Zero Charles used K&Bs Superpoxy Matched Finish System paints Another advantage using chrome MonoKote decide weather model aluminum color automatically shows through heavilyworn areas youre deciding finish next Sport Scale model might want try Charles Bauers time saving approach Something new time read item new version three-line bellcrank will available L-R Products Ltd new bellerank shortspan type approximately 2/2 between elevator line connection points same heavy-duty construction original G-S units major difference between new units original G-S units location elevator pushrod con nection much same old Roberts units new design allows unit mounted much smaller space larger G-S Units therefore suitable use smaller Scale models scale Class Carrier new L-R units come upright inverted mounting versions provide extra throttle control did G-S Units youre looking larger G-S units large Scale model too can obtained L-R Products Ltd data January 1984 171
Edition: Model Aviation - 1984/01
Page Numbers: 70, 71, 90, 91, 169, 170, 171
THE BOSTONIAN Ev ers like small spot easy build semiscale pable good flights small gyms event wingspan 16 ii three fuselage lengi diameter six ture must enclose v X l/ inches minin least two wheels meter fuselage two side windows ol area course powered As originated seven grams Mooney muci tise size 14 grams would b cially inexperi club Scale Statte conducted several con rule like heavier model quite strong can survive bang ing around Free Flight models likely experience tissue can shrunk doped producing attractive model models can flown indoors outdoors rules may seem very restrictive variety designs have resulted much creativity being utilized tried canard configuration several reasons rub ber motor can run full length fuse lage maximum use turns large side area fuselage box could located rearward providing fin action upper picture power rubber motor tapering off Variant begins slow descent landing An illusion seems taking place model doesnt come down steeply picture seems indi cate lower picture glide looks normal goes San Diegos Aero space Museum Model can flown outdoors wind down Fudo Takagi pictures moved about produce best trim plastic propeller used rather sheet balsa shown dead weight will have right nose Perhaps some additional weight over 14-gram total will required plastic props two three times heavier builtup type An experienced modeler could built Variant down seven-gram rule would entail use smaller wood sizes con denser tissue covering no dope V Most important canard good flying stable configuration Some years ago canards rare early-day airplanes tailfirst canard design including famous Wright Flyer followed dearth type until Burt Rutan repopularized canard composite designs As model tailfirst arrangement can produce outstand ing flier rubber-powered Vari ant attests fits Bostonian event rules can flown indoors outdoors Full-size plan pages 90-91 plans printed full size magazine model can built directly Some construction ideas will given modeler has made small stick-and-tissue models sulation board such Cellotex makes good construction surface Pins can stuck easily yet stiff flat Fuselage two sides built atop other matched pair results Care must taken angles wing stabilizer accurate according plans curved sections longerons Whether seen above below evident Variant has crisp pleasing lines Flying tail-first its also different run mill balsa prop made according text plan recommended plastic prop can used expect diminished performance January 1984 71 should pre-bent dont springsary way will have handle back change angleshold onto bending strips Soak Cut strips inch longer neces-Continued page 169 BEND TWO PIECES OF 1/32X 1/16TO FORM TIP STAB I H SPAR TAPERED 1 11 BREAK HERE F p B j STAB THIN METAL UBEARING AS 008 BRASS [-j*1 PROP SHAFT BEARING DETAIL 1/8 VERY/ HARD /8DISCliii I WIRE 41 [020 III I\ I II k 450BLADE ANGLE if' fi 1 - 1/32 It U 1Ij II 1I ACTUAL LONGERON LENGTH 0015WIRE SKID 1 / / BALSA / / I/ PROP JIG II I II i1iJIG FORMER Ii II Ii II ii iI Ii II II II II II Ii BALANC WITH DL 14 GRAM BOSTONIAN CMOAVL FULL SI / Ii I/I Text pages 70-7 1 IfiMEOIUM BALSA HARD BALSAS - DIHEDRAL--~ p I______ G ARE FLAT1 TIP DIHEDRAL 1/16 ALTUBE — -N II IIU III ELAGE TOP VIEWI/ III II/I E NNuI -- STAB MODEL FLIES ON 20 LOOP OF 5/32 3/16RUBBER NOSE FIN _______ ______N 25-----I 1/16 MEDIUMBALSA_ NOTE THIS ANGLEV CCESS HOLE RE TOR 1132 SHEET RIBS WHEELS MADE OF TWO 1/32DISCS CROSSORAIN NQ ment advance wound frantically order ready launch thermal peaked generally soggy conditions new Espada model become wet launched solid balsa wings started fluttering model dove ground breaking wing tips Without hesitation Doring reached spare model waiting state readiness Within two minutes spare wound launched its way convincing max Doring quite surprised little disbelieving learn already 1983 FlB Wakefield Rubber World Cham pion third person tory win two consecutive World Championships first place secured battle remaining positions start round Anzelmo second followed McGihivray Zhang Kilpelainen Zhang scored 161 sec Kilpelainen 146 showing event no means over Jack McGillivray changed models wet condi tions choosing covered Micafilm would waterpfoof managed 110 sec Meanwhile Gun ter Klemke Round 6 flight dropped him eighth scored rare 180 put him back running Steve Beebe could have caught up final flight 116 sec As place positions changed important flight yet made Anzelmo Zen under helpful guid ance Dutch Team Manager Peter De Boer stood alone line waiting launch Several good patches air passed bywith models appearing climb well overheadbut certain 20 mm remaining started rain again heavily Having held motor some consid erable time Zermi took opportunity change motors rewind event ually launched time running out climb good conditions moderate probably longest 180 sec Dutchman can remember Anzelmo Zen second As other scores came con firmed Gunther Klemke taken third Lothar Doring Ger man team instead flying individualiy Germans could have taken team prize too As Chinese team convincing winner having held top position throughout contest Italy held onto second place Great Britain having its best World Champs years third Variant/Mather Continued page 71 MORE COLOR 0 Ge ~Lr6 QO r0 0 \\e eS AO iron too hot Draw wet scrap pieces balsa across iron bending si multaneously Too much bending will course break wood Practice will teach much pressure can tolerated Much depends upon hardness grain wood Stubborn pieces can dipped water few draws Eventually wood should nearly conform plan curves rear fuselage built con tinuously up through motor tube will located Later part will cut away Note longerons actually longer appears direct side view because rear part fuselage bent sharply form point two jig formers big help proHOBBYPOXY PRODUCTS a division Pettit Paint Company Inc 10 Pine Street Box 378 Rockaway NJ 07866-0378 ducing accurate fuselage sim ply rectangular pieces sheet balsa cut fit between sides fuselage shown Form box two fuselage sides formers glue still soft set box over top view fuselage alignment can checked glue hardens notch inside longerons sharp bend oc curs Crack longerons bend fill notch will glue pin rear fuse lage together Check top view alignment again Cut front crosspieces glue place sides can held against crosspieces sliding bottle side glue set add crosspieces nose block landing gear etc January 1984 169 strips some scrap pieces water hour Allow soldering iron par tially heat up Test holding piece balsa against iron chars once slots wing stab left rec tangular until testing completed incidence changes can made necessary Remove jig formers Cut rectangular piece balsa motor tube should wide enough fit around form used /2-in drill shank works fine sheet can thinner 2 sand down thinner tube could smaller dia meter still carry rubber made ing tube could used protect fuselage during wind ing rubber Soak wood overnight water lash form narrow cloth strip old sheet Bake 2500 hour Glue seam cut V-slot tube fits over rear fuselage Pencil lightly around tube contacts fuselage Cut away part fuselage inside tube within / pencil mark Glue tube place Prop blades cut 2 sheet can sanded thinner also Soak water overnight lash large coffee can tips skewed about 150 left Bake hour 2500 prop spar should very hard balsa center should /o diameter spar tapered points center prop jig necessary us get blade angles correct Some modelers eye small sketch shows upright piece needed prop shaft 450 piece blade two vertical pieces glued base l/4 apart will give Il-in pitch Sharpen end prop shaft wire push through center prop sparbut glue yet Slot blades accept prop spar Glue blade spar glue still soft set pieces jig Hold wire shaft upright piece tape strip let blade lay against 450 sheet glue set complete other half motor tube plug made two discs /t balsa glued crossgrain smaller disc should snug fit motor tube larger disc overlaps tube holes prop shaft can punched through metal pins metal thin few pins may get bent over no small drill available pins will job Pins tapered hammer far enough shaft can spin freely side metal will have big burr put side against balsa gluing bearing plug Slide shaft through plug add small washer glass bead desired good glue shoulder prop shaft will suffice though Slide prop shaft through previously-made hole bend end shaft over Glue securely Build up glue shoulder inside prop hub applying several coats glue will form smooth fillet left itself wanted As coat begins harden use razor blade push glue down flat shoulder around shaft piece Ao-in 2-in aluminum tubing makes good anchor peg front rubber hole cut underside nose can see string motor Wing stab Make stabilizer edges spar hard balsa stab front likely take brunt collision forces Tapering spar gives added strength fuselage-stabilizer joint high-stress point tips bent like fuselage longerons ever made two laminations give added rigidity against pulling tissue Shape ribs siack rectangular pieces very much alike First cut rectangular pieces rib about A6 larger ribs Trace rib shape two pieces Stack pieces like deck cards two traced ribs outside Shape entire stack rib outline including notching spars Taper spar notch end other case stab Make center panels wing stab top spars place allowing spars extend /o beyond end rib Allow glue set thoroughly chance warping reduced Assemble tip sections spars Glue center sections tips propped up dihedral add spars making good fit ends spars center panels Check surfaces warps before covering present hold warped area jet steam twist opposite warp Cover model lightweight tissue water-shrink As tissue dries pin center panels flat surface resist warping Apply two thin coats dope two parts thinner part dope again protecting against warps steam treatment can remove warps covered surfaces also fuselage area above wing stab left uncovered until flight tests completed Flying Glue wing stab position lightly Check balance point add clay lead nose tail bring location shown plans original model flown right against tor que took several degrees right thrust shown plan end motor tube angled change thrust first tests make motor just long enough reach prop hook peg Such motor can easily wound hand quick testing Wind about 100 turns launch model level flight just couple feet off ground Unless serious errors made during con struction small corrections will nec essary diving tendency cut lead ing edge stab free prop up Thin strips cut IBM tab card work fine small changes model tends stall fly straight increase offset thrust tighten turn stalling per170 Model Aviation Tired Being Shot Down SUPER SERVO GARD Controls Throttle Cant * Constantly monitors receiver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smash-ups Endersed IMAAShew Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt Cut-Out Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negative pulse ordering RF Enterprises 106 N Main St Arlington OH 45814 419 365-5056 GIANT SCALE & SPORT PLANS SETS & KITS order contains concise construction manual Partial kits include precut wing ribs fuselage formers prebent lending gear already have pier sets may deduct 1000 prices partial kits listed below Fiberglass parts available no longer carry full kits J B Special MK 4 convertible 54~ Monoplane 75 Biplane Weighs 18 lbs Low Wing Biplane fr Parasol Plans $1700Plans $1700 Partial Kit $1500 EitherBoth Partial Kit $9500 Travel Air 2000 105 classic Scale Biplane Wt 23 lbs Plans $1700Partial Kit $13000 Travel Air 4000 99 Radial Eng classic Biplane 23 lbs Plans $1700Partial Kit $13000 Fokker 0-ViI 58 German WWI Rghter Biplane 23 lbs Plans $1700Partial Kit $13000 Sopwith Tripehound50 WWI Triplane 17 lbs Plans $1700Partial Kit $14000 Sopwitli Pup80 WWI Biplane16-17 lbs Plans $1700Partial Kit $13000 WACO UPF790 Biplane 23 lbsPlans $1700 Airplanes Landing Gear 2wire formed $995 hipping Assembled ready install $1996 hipping lWheel Pants models add $51 Cabanas$995 hipping Fokker Cabanas$1495 hipping HamSway Packageincludes famous Behrens strut system$1195PP Ordering information orders shipped UPS Par cel Post edd $3 shipping plans $10 kits Make checks payable Jerry Behrens fastest service send Postal Money Order bank check Sorry no CODs accepted Send mail orders BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 Phone 1212 3374957 Allow weeks delivery ists cut trailing edge stab free nd prop up Go easy trim though s angle shown plan nearly riinimum thats possible flying Moving ne weight forward will help prevent stalI ng also circle made small such 0 feet may necessary raise front f stab somewhat short motor model should tall little power off full ength motor will add weight forward educe eliminate stall As trim ning refined increased turns finally ry longer motors small fin added nose make turn tighter though model flew well model could probably lown left particularly flown ndoors under low ceiling low power s used ROG flying found large arking lots some supermarkets great et early dawn hours sir still vacant day aving such fun took flight hough light breeze sprung upyes vas weak thermal model landed s K-Man roof Later approached manager surprised showed no irritation went right up roof retrieve model turned out used build fly models Another time large dog walking small man spoke strong accent much interested model WW LI worked Willy Messerschmitt So sorts teresting things seem happen flying Variant case hobby shop doesnt stock parts models such Variant names addresses two mail order sup pliers Im sure Oldtimer Models PO Box 913 Westminster CA 92683 Peck-Polymers PO Box 2498 La Mesa CA 92041 CL Scale/Boss Continued paoe 72 probably contributed Les observations team selection contest open entry did make difference beginner expert under entry circumstances would no doubt see some unskilled modelers problems discussed commentary brings mind some basic ques tions right have completely open competition World Championship team selection Should entry vitation based past performance local National contests Should teamselection program result showcase event very best compete have thoughts matter drop line write National Association Scale Aeromodelers NASA John Guen ther President Box 714 RR #1 Borden IN 47106 Im sure comments will well-received could help NASA planning future Scale team selection pro grams Before closing item should AL-TEC PROdUCTS INC INTRODUCES NEW BUILDING CONCEPT unique ALISpARl&2 AL-T-SpAR 2 [patent pending] integral component uni-structure membered light weight Alum inum beam T spar Specially planned total model aircraft world mind STRONG easy use balsa foam wings tail planes Spar material Aluminum alloy 018 nominal thick ALISpAR1 • 8 az/ft 1/8x3/8 hollow flanges 7/8 overall height $200 per lineal ft sailable 2ft 3ff 4ft Only AlISpAR2 z/ft. 1/8 3/8 hollow flanges 1 3/ oa Ht $215 per ml ftl available in4 ft AL-joIMER 090 339 6 2024 T6 Aluminum $100 es TijoiNER Isee above AIjoiner dimensional grade 4 A/C titanium $100 eal AI-TSpars proportioned /z dimensions AIl-Spars Price length same AL-TEC Products Inc PO Box 3591 Boardman OH 44512 noted NASA sponsored ran years Scale team selection program first time completely independent func tion AMA event reports coming indicate NASA local Louisville clubs did excellent job Congratulations Finishing made easy Charles Bauer Norridge IL tells us following few simple steps too can greatly reduce effort required put finish Sport Scale model Charles flew fine-looking A6M2 Zero fighter see accompanying photos 1983 Nats con siderable amount rivet skin panel de tail finish modelers should able produce quite easily Rather using extensive applications balsa filler paint obtain good finish Zero Charles did minor amount grain-filling applied chrome MonoKote covering per instruc tions accompanying covering mateial After MonoKote covering com pleted skin panel outlines rivet patterns applied Skin panel outlines made scoring covering fine ball-point pen similar object Care should taken cut through covering flexible plastic ruler can used curved surfaces model keep panel lines straight Rivet markings made lightly pressing dressmakers pattern tracing wheel MonoKote surface right pressure experiment test pieces will produce indentation viewed distance several feet will look very much like flush rivets Once again flexible ruler used wheel held against producing straight lines rivets pattern tracing wheel know what is about inch diameter has teeth similar Send $100 Building Guide AI-Tec Product list deducted form 1st order gear usually mounted small plas tic handle can found stores sell sewing supplies little shopping around will turn up wheels varying num bers teeth making useful pro ducing patterns different rivet spacings rivet panel markings completed covering surface should rubbed lightly fine steel wool steel wool will provide finely-scratched surface better adherence expoxy-paint fin ish case Zero Charles used K&Bs Superpoxy Matched Finish System paints Another advantage using chrome MonoKote decide weather model aluminum color automatically shows through heavilyworn areas youre deciding finish next Sport Scale model might want try Charles Bauers time saving approach Something new time read item new version three-line bellcrank will available L-R Products Ltd new bellerank shortspan type approximately 2/2 between elevator line connection points same heavy-duty construction original G-S units major difference between new units original G-S units location elevator pushrod con nection much same old Roberts units new design allows unit mounted much smaller space larger G-S Units therefore suitable use smaller Scale models scale Class Carrier new L-R units come upright inverted mounting versions provide extra throttle control did G-S Units youre looking larger G-S units large Scale model too can obtained L-R Products Ltd data January 1984 171
Edition: Model Aviation - 1984/01
Page Numbers: 70, 71, 90, 91, 169, 170, 171
THE BOSTONIAN Ev ers like small spot easy build semiscale pable good flights small gyms event wingspan 16 ii three fuselage lengi diameter six ture must enclose v X l/ inches minin least two wheels meter fuselage two side windows ol area course powered As originated seven grams Mooney muci tise size 14 grams would b cially inexperi club Scale Statte conducted several con rule like heavier model quite strong can survive bang ing around Free Flight models likely experience tissue can shrunk doped producing attractive model models can flown indoors outdoors rules may seem very restrictive variety designs have resulted much creativity being utilized tried canard configuration several reasons rub ber motor can run full length fuse lage maximum use turns large side area fuselage box could located rearward providing fin action upper picture power rubber motor tapering off Variant begins slow descent landing An illusion seems taking place model doesnt come down steeply picture seems indi cate lower picture glide looks normal goes San Diegos Aero space Museum Model can flown outdoors wind down Fudo Takagi pictures moved about produce best trim plastic propeller used rather sheet balsa shown dead weight will have right nose Perhaps some additional weight over 14-gram total will required plastic props two three times heavier builtup type An experienced modeler could built Variant down seven-gram rule would entail use smaller wood sizes con denser tissue covering no dope V Most important canard good flying stable configuration Some years ago canards rare early-day airplanes tailfirst canard design including famous Wright Flyer followed dearth type until Burt Rutan repopularized canard composite designs As model tailfirst arrangement can produce outstand ing flier rubber-powered Vari ant attests fits Bostonian event rules can flown indoors outdoors Full-size plan pages 90-91 plans printed full size magazine model can built directly Some construction ideas will given modeler has made small stick-and-tissue models sulation board such Cellotex makes good construction surface Pins can stuck easily yet stiff flat Fuselage two sides built atop other matched pair results Care must taken angles wing stabilizer accurate according plans curved sections longerons Whether seen above below evident Variant has crisp pleasing lines Flying tail-first its also different run mill balsa prop made according text plan recommended plastic prop can used expect diminished performance January 1984 71 should pre-bent dont springsary way will have handle back change angleshold onto bending strips Soak Cut strips inch longer neces-Continued page 169 BEND TWO PIECES OF 1/32X 1/16TO FORM TIP STAB I H SPAR TAPERED 1 11 BREAK HERE F p B j STAB THIN METAL UBEARING AS 008 BRASS [-j*1 PROP SHAFT BEARING DETAIL 1/8 VERY/ HARD /8DISCliii I WIRE 41 [020 III I\ I II k 450BLADE ANGLE if' fi 1 - 1/32 It U 1Ij II 1I ACTUAL LONGERON LENGTH 0015WIRE SKID 1 / / BALSA / / I/ PROP JIG II I II i1iJIG FORMER Ii II Ii II ii iI Ii II II II II II Ii BALANC WITH DL 14 GRAM BOSTONIAN CMOAVL FULL SI / Ii I/I Text pages 70-7 1 IfiMEOIUM BALSA HARD BALSAS - DIHEDRAL--~ p I______ G ARE FLAT1 TIP DIHEDRAL 1/16 ALTUBE — -N II IIU III ELAGE TOP VIEWI/ III II/I E NNuI -- STAB MODEL FLIES ON 20 LOOP OF 5/32 3/16RUBBER NOSE FIN _______ ______N 25-----I 1/16 MEDIUMBALSA_ NOTE THIS ANGLEV CCESS HOLE RE TOR 1132 SHEET RIBS WHEELS MADE OF TWO 1/32DISCS CROSSORAIN NQ ment advance wound frantically order ready launch thermal peaked generally soggy conditions new Espada model become wet launched solid balsa wings started fluttering model dove ground breaking wing tips Without hesitation Doring reached spare model waiting state readiness Within two minutes spare wound launched its way convincing max Doring quite surprised little disbelieving learn already 1983 FlB Wakefield Rubber World Cham pion third person tory win two consecutive World Championships first place secured battle remaining positions start round Anzelmo second followed McGihivray Zhang Kilpelainen Zhang scored 161 sec Kilpelainen 146 showing event no means over Jack McGillivray changed models wet condi tions choosing covered Micafilm would waterpfoof managed 110 sec Meanwhile Gun ter Klemke Round 6 flight dropped him eighth scored rare 180 put him back running Steve Beebe could have caught up final flight 116 sec As place positions changed important flight yet made Anzelmo Zen under helpful guid ance Dutch Team Manager Peter De Boer stood alone line waiting launch Several good patches air passed bywith models appearing climb well overheadbut certain 20 mm remaining started rain again heavily Having held motor some consid erable time Zermi took opportunity change motors rewind event ually launched time running out climb good conditions moderate probably longest 180 sec Dutchman can remember Anzelmo Zen second As other scores came con firmed Gunther Klemke taken third Lothar Doring Ger man team instead flying individualiy Germans could have taken team prize too As Chinese team convincing winner having held top position throughout contest Italy held onto second place Great Britain having its best World Champs years third Variant/Mather Continued page 71 MORE COLOR 0 Ge ~Lr6 QO r0 0 \\e eS AO iron too hot Draw wet scrap pieces balsa across iron bending si multaneously Too much bending will course break wood Practice will teach much pressure can tolerated Much depends upon hardness grain wood Stubborn pieces can dipped water few draws Eventually wood should nearly conform plan curves rear fuselage built con tinuously up through motor tube will located Later part will cut away Note longerons actually longer appears direct side view because rear part fuselage bent sharply form point two jig formers big help proHOBBYPOXY PRODUCTS a division Pettit Paint Company Inc 10 Pine Street Box 378 Rockaway NJ 07866-0378 ducing accurate fuselage sim ply rectangular pieces sheet balsa cut fit between sides fuselage shown Form box two fuselage sides formers glue still soft set box over top view fuselage alignment can checked glue hardens notch inside longerons sharp bend oc curs Crack longerons bend fill notch will glue pin rear fuse lage together Check top view alignment again Cut front crosspieces glue place sides can held against crosspieces sliding bottle side glue set add crosspieces nose block landing gear etc January 1984 169 strips some scrap pieces water hour Allow soldering iron par tially heat up Test holding piece balsa against iron chars once slots wing stab left rec tangular until testing completed incidence changes can made necessary Remove jig formers Cut rectangular piece balsa motor tube should wide enough fit around form used /2-in drill shank works fine sheet can thinner 2 sand down thinner tube could smaller dia meter still carry rubber made ing tube could used protect fuselage during wind ing rubber Soak wood overnight water lash form narrow cloth strip old sheet Bake 2500 hour Glue seam cut V-slot tube fits over rear fuselage Pencil lightly around tube contacts fuselage Cut away part fuselage inside tube within / pencil mark Glue tube place Prop blades cut 2 sheet can sanded thinner also Soak water overnight lash large coffee can tips skewed about 150 left Bake hour 2500 prop spar should very hard balsa center should /o diameter spar tapered points center prop jig necessary us get blade angles correct Some modelers eye small sketch shows upright piece needed prop shaft 450 piece blade two vertical pieces glued base l/4 apart will give Il-in pitch Sharpen end prop shaft wire push through center prop sparbut glue yet Slot blades accept prop spar Glue blade spar glue still soft set pieces jig Hold wire shaft upright piece tape strip let blade lay against 450 sheet glue set complete other half motor tube plug made two discs /t balsa glued crossgrain smaller disc should snug fit motor tube larger disc overlaps tube holes prop shaft can punched through metal pins metal thin few pins may get bent over no small drill available pins will job Pins tapered hammer far enough shaft can spin freely side metal will have big burr put side against balsa gluing bearing plug Slide shaft through plug add small washer glass bead desired good glue shoulder prop shaft will suffice though Slide prop shaft through previously-made hole bend end shaft over Glue securely Build up glue shoulder inside prop hub applying several coats glue will form smooth fillet left itself wanted As coat begins harden use razor blade push glue down flat shoulder around shaft piece Ao-in 2-in aluminum tubing makes good anchor peg front rubber hole cut underside nose can see string motor Wing stab Make stabilizer edges spar hard balsa stab front likely take brunt collision forces Tapering spar gives added strength fuselage-stabilizer joint high-stress point tips bent like fuselage longerons ever made two laminations give added rigidity against pulling tissue Shape ribs siack rectangular pieces very much alike First cut rectangular pieces rib about A6 larger ribs Trace rib shape two pieces Stack pieces like deck cards two traced ribs outside Shape entire stack rib outline including notching spars Taper spar notch end other case stab Make center panels wing stab top spars place allowing spars extend /o beyond end rib Allow glue set thoroughly chance warping reduced Assemble tip sections spars Glue center sections tips propped up dihedral add spars making good fit ends spars center panels Check surfaces warps before covering present hold warped area jet steam twist opposite warp Cover model lightweight tissue water-shrink As tissue dries pin center panels flat surface resist warping Apply two thin coats dope two parts thinner part dope again protecting against warps steam treatment can remove warps covered surfaces also fuselage area above wing stab left uncovered until flight tests completed Flying Glue wing stab position lightly Check balance point add clay lead nose tail bring location shown plans original model flown right against tor que took several degrees right thrust shown plan end motor tube angled change thrust first tests make motor just long enough reach prop hook peg Such motor can easily wound hand quick testing Wind about 100 turns launch model level flight just couple feet off ground Unless serious errors made during con struction small corrections will nec essary diving tendency cut lead ing edge stab free prop up Thin strips cut IBM tab card work fine small changes model tends stall fly straight increase offset thrust tighten turn stalling per170 Model Aviation Tired Being Shot Down SUPER SERVO GARD Controls Throttle Cant * Constantly monitors receiver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smash-ups Endersed IMAAShew Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt Cut-Out Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negative pulse ordering RF Enterprises 106 N Main St Arlington OH 45814 419 365-5056 GIANT SCALE & SPORT PLANS SETS & KITS order contains concise construction manual Partial kits include precut wing ribs fuselage formers prebent lending gear already have pier sets may deduct 1000 prices partial kits listed below Fiberglass parts available no longer carry full kits J B Special MK 4 convertible 54~ Monoplane 75 Biplane Weighs 18 lbs Low Wing Biplane fr Parasol Plans $1700Plans $1700 Partial Kit $1500 EitherBoth Partial Kit $9500 Travel Air 2000 105 classic Scale Biplane Wt 23 lbs Plans $1700Partial Kit $13000 Travel Air 4000 99 Radial Eng classic Biplane 23 lbs Plans $1700Partial Kit $13000 Fokker 0-ViI 58 German WWI Rghter Biplane 23 lbs Plans $1700Partial Kit $13000 Sopwith Tripehound50 WWI Triplane 17 lbs Plans $1700Partial Kit $14000 Sopwitli Pup80 WWI Biplane16-17 lbs Plans $1700Partial Kit $13000 WACO UPF790 Biplane 23 lbsPlans $1700 Airplanes Landing Gear 2wire formed $995 hipping Assembled ready install $1996 hipping lWheel Pants models add $51 Cabanas$995 hipping Fokker Cabanas$1495 hipping HamSway Packageincludes famous Behrens strut system$1195PP Ordering information orders shipped UPS Par cel Post edd $3 shipping plans $10 kits Make checks payable Jerry Behrens fastest service send Postal Money Order bank check Sorry no CODs accepted Send mail orders BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 Phone 1212 3374957 Allow weeks delivery ists cut trailing edge stab free nd prop up Go easy trim though s angle shown plan nearly riinimum thats possible flying Moving ne weight forward will help prevent stalI ng also circle made small such 0 feet may necessary raise front f stab somewhat short motor model should tall little power off full ength motor will add weight forward educe eliminate stall As trim ning refined increased turns finally ry longer motors small fin added nose make turn tighter though model flew well model could probably lown left particularly flown ndoors under low ceiling low power s used ROG flying found large arking lots some supermarkets great et early dawn hours sir still vacant day aving such fun took flight hough light breeze sprung upyes vas weak thermal model landed s K-Man roof Later approached manager surprised showed no irritation went right up roof retrieve model turned out used build fly models Another time large dog walking small man spoke strong accent much interested model WW LI worked Willy Messerschmitt So sorts teresting things seem happen flying Variant case hobby shop doesnt stock parts models such Variant names addresses two mail order sup pliers Im sure Oldtimer Models PO Box 913 Westminster CA 92683 Peck-Polymers PO Box 2498 La Mesa CA 92041 CL Scale/Boss Continued paoe 72 probably contributed Les observations team selection contest open entry did make difference beginner expert under entry circumstances would no doubt see some unskilled modelers problems discussed commentary brings mind some basic ques tions right have completely open competition World Championship team selection Should entry vitation based past performance local National contests Should teamselection program result showcase event very best compete have thoughts matter drop line write National Association Scale Aeromodelers NASA John Guen ther President Box 714 RR #1 Borden IN 47106 Im sure comments will well-received could help NASA planning future Scale team selection pro grams Before closing item should AL-TEC PROdUCTS INC INTRODUCES NEW BUILDING CONCEPT unique ALISpARl&2 AL-T-SpAR 2 [patent pending] integral component uni-structure membered light weight Alum inum beam T spar Specially planned total model aircraft world mind STRONG easy use balsa foam wings tail planes Spar material Aluminum alloy 018 nominal thick ALISpAR1 • 8 az/ft 1/8x3/8 hollow flanges 7/8 overall height $200 per lineal ft sailable 2ft 3ff 4ft Only AlISpAR2 z/ft. 1/8 3/8 hollow flanges 1 3/ oa Ht $215 per ml ftl available in4 ft AL-joIMER 090 339 6 2024 T6 Aluminum $100 es TijoiNER Isee above AIjoiner dimensional grade 4 A/C titanium $100 eal AI-TSpars proportioned /z dimensions AIl-Spars Price length same AL-TEC Products Inc PO Box 3591 Boardman OH 44512 noted NASA sponsored ran years Scale team selection program first time completely independent func tion AMA event reports coming indicate NASA local Louisville clubs did excellent job Congratulations Finishing made easy Charles Bauer Norridge IL tells us following few simple steps too can greatly reduce effort required put finish Sport Scale model Charles flew fine-looking A6M2 Zero fighter see accompanying photos 1983 Nats con siderable amount rivet skin panel de tail finish modelers should able produce quite easily Rather using extensive applications balsa filler paint obtain good finish Zero Charles did minor amount grain-filling applied chrome MonoKote covering per instruc tions accompanying covering mateial After MonoKote covering com pleted skin panel outlines rivet patterns applied Skin panel outlines made scoring covering fine ball-point pen similar object Care should taken cut through covering flexible plastic ruler can used curved surfaces model keep panel lines straight Rivet markings made lightly pressing dressmakers pattern tracing wheel MonoKote surface right pressure experiment test pieces will produce indentation viewed distance several feet will look very much like flush rivets Once again flexible ruler used wheel held against producing straight lines rivets pattern tracing wheel know what is about inch diameter has teeth similar Send $100 Building Guide AI-Tec Product list deducted form 1st order gear usually mounted small plas tic handle can found stores sell sewing supplies little shopping around will turn up wheels varying num bers teeth making useful pro ducing patterns different rivet spacings rivet panel markings completed covering surface should rubbed lightly fine steel wool steel wool will provide finely-scratched surface better adherence expoxy-paint fin ish case Zero Charles used K&Bs Superpoxy Matched Finish System paints Another advantage using chrome MonoKote decide weather model aluminum color automatically shows through heavilyworn areas youre deciding finish next Sport Scale model might want try Charles Bauers time saving approach Something new time read item new version three-line bellcrank will available L-R Products Ltd new bellerank shortspan type approximately 2/2 between elevator line connection points same heavy-duty construction original G-S units major difference between new units original G-S units location elevator pushrod con nection much same old Roberts units new design allows unit mounted much smaller space larger G-S Units therefore suitable use smaller Scale models scale Class Carrier new L-R units come upright inverted mounting versions provide extra throttle control did G-S Units youre looking larger G-S units large Scale model too can obtained L-R Products Ltd data January 1984 171