he Moth biplane designed Geoffrey de Havilland 1925 sport aircraft Gipsy Moth created 1928 replacing original Airdisco engine Halforckdesigned 100 hp Gipsy engine Gipsy Moth instant success nd 1162 manufactured manufactured US Moth Aircraft Corporation f America thus earning US-approved type certificate During late 1920s early 1930s amazing long distanc ffights made Gipsy Moths included Amy Johnsons solo flight London and Australia Lady Baileys 18000 mile solo flight around Africa Lt Bentleys solo flight London Capetown South Africa Gipsy Moth recently featured movie Out Africa Unfortunately no Gipsy Moths left US British have purchased returned homeland However fellow California reputed converting Tiger Moths back Gipsy Moths number years ago beautiful all-white Gipsy Moth temporarily housed hangar next between EAA convention Bkkesburg Frank B Baker September 1994 33 AAA fly-in small size rather fragile beauty plane anchored itself back mind did come fore until purchased OS 20 four-stroke engine started thinking about biplanes Gipsy Moth became obvious plane build Arbitrarily selecting 50-inch wingspan enlarged excellent set threeviews appeared Aeromodeller result moderately sized model ideally matched its power plant 9 x 6 prop CONSTRUCTION standards Gipsy Moth particularly light model should take pains keep weight down Use epoxy very sparingly some reason adds weight very insidious manner Choosing weight balsa consistent its use also important Wings Since wings easiest part model will needed build fuselage lets start wing spars consist top bottom x ce balsa sandwiched between Use aliphatic resin glue laminate spars sure secure manner will ensure straight Note balsa spacer does go root rib plywood dihedral brace slips Since wings longer standard 48-inch strip make spars wing panel cut spruce pieces short center section Make wing ribs stacking /16 balsa blanks cutting band saw usually make ribs wing panel time Although plans show false rib between full rib did put just adds weight work Once ribs have cut lay out complete wing building board pin three segments spar place important keep three segments properly aligned problems arise putting dihedral braces remainder wing construction Left The Moth covered silk Finish silver dope sprayed over brushed-on clear dope base Below The Moth flies realistically predictably Turns require coordinated rudder elevator aileron V standard however will need trim ribs Y16 sheet used root end wing panels install sheeting top wing until wing cabane struts have fitted Once wing panels have built laminate 1/ x ce spar caps four dihedral braces trim fit holes wing spars Glue center section spar stubs slide holes wing panel spars block up wings get 12 inches dihedral outer 34 Model Aviafion 4 end rear spar After checking wings equal dihedral no twist let glue dry overnight Once panels have joined use razor saw cut rib 2 plywood dihedral plates cam glued front back spar eight 3A2 balsa center ribs can split lengthwise glued center section top wing top center section sheeted 42 provide sturdy hand hold no center section ribs lower wing spars glue directly fuselage Note ailerons lower wing like use nylon tubing bronze cable y Lobby HLH 805 actuate ailerons Bring nylon tubing forward per plans get large smooth-radius turn tubing makes 900 turn aileron will result smoothly functioning aileron personal preference use continuous length aileron cable Z piece wire soldered center hook onto servo arm install nylon tubing cable until lower wing has glued fuselagethe tubing runs fusleage cable runs through Cut eight outer wing strut supports some 015 aluminum sheet bend per plans drill bolt holes Use some soft copper wire bind strut supports wing spars sure top strut fittings point down bottom fittings point up Put liberal amount Ambroid glue over wire fittings cut slits /16 sheet goes over fittings glue sheets between appropriate ribs sheeting will provide place anchor covering area brackets end result about 5/ inch metal will out open Fuselage Build two fuselage sides directly over plans sure use hardest 3/is square balsa can find top bottom longerons install 3A6 sheet triangles rear cockpit until sides have joined Glue A2 plywood doubler inside fuselage side using epoxy Make plywood firewall cut holes engine mounts drill gas tank holes Lay firewall flat surface use epoxy glue maple engine mount beams Use several metal triangles insure beams 900 firewall no down thrust side thrust Epoxy /i plywood front beam former place Lay two fuselage sides top down flat surface about /2 inch front extending over end pin block straight Glue /6 square top bottom crosspieces F4 eventually goes Glue former B3 /l6 sheet grain crosswise goes B3 /l6 square crosspiece glue tail posts together Set fuselage aside make fuel tank like make own tanks K&S #254 easy solder tin sheet Make pattern doubling half-scale pattern plans cut tin accordingly Solder tank such rear can left open Cut lengths er tubing get auto-supply houses make two vents fuel line Run fuel line bottom center rear tank solder floor tank sure have soldered shut Leave three tubes coming straight out front tank solder both inside outside tank Close up back tank solder shut Use thinner some other solvent remove soldering paste Fill bucket water check tank leaks Once tank leak free drill holes firewall allow three tubes pass through Slip tubes partially through firewall put bit epoxy between tank firewall push tank forward hold until epoxy has set Bend center fuel line upward cut off leave about Y2 inch straight tubing fuel line slide scheme makes lot easier run fuel line carburetor back fourstroke engine Epoxy firewall assembly fuselage sides Again sure no down side thrust Glue / sheet tank support bottom tank top wing cabane struts built next September 1994 35 Basswood tail surface outlines laminated 1/16 strips soaked water wrapped around plywood forms Wing strut sandwiches designed allow addition top wing either before after covering Moths lower wing has 20 incidence top wing set 30 Robart incidence meter used set angles properly Bend / music wire per plans struts will attached fuselage using plywood sandwich has wire middle attach wings 2A sandwich wing spar forms third layer Cut sandwich centers 1/ plywood cut slot fit Vs music wire Cut back sandwich fuselage end wing ends 1/16 plywood Lay three Y16 plywood plates flat surface coat some slow-cure epoxy Lay c wire down fit /i plywood center pieces around put some epoxy sure fill space between wire plywood rear cabane strut lay down top 1/16 plywood plate wire goes across fuselage front cabane strut fuselage sandwich top plate consists former F3 1/8 Lite Ply wing ends cabane struts lay some plastic film over epoxy place weights three sandwiches both struts sure check plates have slid weights placed Remove fuselage building board Make two As plywood rear cabane strut fuselage doublers Glue front cabane strut sandwich F3 making sure 900 top fuselage let glue set Block up fuselage workbench set top longeron fuselage 00 Use some small C-clamps hold 2A sandwiches wing ends front cabane strut front front wing spar Loosely assemble rear cabane sandwich /is doublers Apply some slow curing epoxy glue slip assembly fuselage Again use some small Cclamps hold 2/3 sandwiches tops cabane struts front rear spar Use Robart incidence meter set top wing 300d incidence Slide fuselage end rear cabane strut doublers up down until proper incidence obtained important also measure wingtips workbench surface make sure wing sitting level use some Cclamps hold A6 plywood doublers fuselage sides Leave room until glue has set Although plans show sharp break rear cockpit cut longerons achieve break Simply glue tail posts together let longerons take natural bend may have make F5-F7 bit wider accommodate bend Glue top bottom 3/is square crosspieces vertical fuselage formers F4a-F7 After have glued top fuselage stringers use round file remove balsa between tops stringers better-looking fuselage Rough-cut balsa block fit between firewall former F3 carve shape Note firewall has square top transitions half-round F3 Hollow block glue Bend front cabane support wire make plywood sandwich Use soft copper wire bind top strut front cabane strut glue sandwich fuselage glue has set solder copper wire two struts careful overheat wire 2/3 sandwich could loosened top wing can now removed might well make cockpit hatch cover time simply A2 plywood floor formers 3A2 sheet bent over formers 1/ square spruce stringers add some strength prevent cockpit edges getting beat up due handling Bend two landing gear wires glue plywood sandwiches 36 Model Aviation leted framework ready cover 50-inch span proved idea match OS 20 26 9 x 6 prop Only lower wing has ailerons Author prefers use nylon tubing single length bronze cable Two-inch scale Williams Brothers pilot installed its head positioned would landing Cli I-i Type RO Scale Wingspan 50 inches Engine OS 20-26 Number channels Four Flying weight 68 ounces Construction Built-up Covering/finish Silk dope 1%uuu- PRANK 3AKR LniNrnED4-AS8 WOOD N N N N 1--- LPMINPThfl - SOPASS WOOD 5rNGRS MLJSC NIREN - AILISIC MFE FLY7 7 7 BLSfl BLOCKSMT JMUSC WRE 3 LVLLMSRO5 NN 7 32 1IIE GPSY-k1oTHER SEEs ALL AMThLL5 ALL FOR C OO Pt/ANT Th flv ]L& FurL/RE OF Th ETTz JEtJ 9LLAop oqCyEp CAJE CrOU DiMT FOoL /IE TO INSTANT INM PLSR RI&5TbUE NOT G77AJ ANY OF frW I-ION Ey/ OI Too &u, PEAD M CAt IN YOuR FUTURS WILL 7 TAKE AIASTER CI4ARE TE II TE ~LL IcL-r II NLN WOOD~ N N N jx RLSP k C CD CD CCD 0 0 CA -J Full-Size Plans AvailableSee Page 160 N 0 FU Iw a~i1 01 H~iI_ I~ CUa-U u\0Ia III ~0 2 Lwn 2 aI I b Ill __ 2/l aad tiIa aII 2][b472177704415280]]-~CD ia~ CaIS00 4Q4 U \4tIII18 _K 0II wII II 2 I~ 0 I HHI W LLU a-iTT~a II 8 Model Aviation l some working room lets take care servo installation First fit lower wing fuselage Use razor saw cut slots lower fuselage accept lower wing spars Note rear spar out open trailing edge wing quite bit below bottom fuselage because full-size Gipsy Moth folding wings folded lower wing trailing edge went under fuselage sure adjust slots lower wing has 20 incidence glue wing fuselage should some space between root rib fuselage side allow covering rib fuselage side Measure wingtips ensure lower wing level Use some epoxy glue main landing gear plywood sandwich fuselage forward lower wing spar Use piece 3/33 sheet balsa serve pattern aileron servo platform Trim until will fit between main landing gear plywood sandwich B3 Once fits duplicate /32 plywood glue place Make some 3/33 x ood strips width fuselage glue 1A6 below edge lower longerons front spar B3 serve screw plates servo hatch cover Make servo hatch cover 1Ao plywood sure build some curvature hatch cover hold some small glued-on strips matches lower longeron curvature Mount three servos side-by-side servo mount two -inch strips /i plywood slip 3/s-square maple servo mount rails fuselage slip three servos fuselage Mark screw holes e rails Pull servos rails out screw together Slip whole unit glue rails fuselage side former B3 Adjust position rails until bottoms three servos about /o inch above aileron servo plate sure rails parallel top longerons Now bottom fuselage can finished Clamp plywood sandwich forward 3A2 music wire landing gear back fuselage Measure main landing gear wire allow bend Remove unit bend ends wires Some trial-and-error bending twisting will needed until bends fit front main gear wire Once done epoxy plywood sandwich rear firewall wrap wires copper wire solder front supports main gear wire Solder two strips brass shim stock main landing gear leg glue airfoil-shaped balsa fairings Glue 3Ao sheet cross-grain firewall main landing gear sandwich Tail tail feathers standard construction Note ear post vertical fin goes way bottom fuselage Just looks used old free flight technique make curved outline pieces Cut pieces ood inner shape five empennage parts Soak lengths /16 square basswood water bend around form hold place masking tape Using white glue laminate four layers horizontal plane until outline YI6 thick Let glue dry day remove outlines forms Use small block plane smooth surface result will beautiful outline both strong light seems like too much work just cut outlines Ve6 sheet balsa lower rudder hinge fabricated 010 brass shim stock Wrap brass shim stock around 1A6 music wire solder shim stock together wire Remove wire use file remove appropriate metal result should look just like standard Du-Bro Klett nylon hinge Bend length Ve6 music wire fit 1 tail wheel Run wire through nylon Goldberg tail wheel bracket through brass hinge assembly Make 900 bend rear cut off per plans Use razor saw cut ical slot tail post fuselage Glue stabilizer top longerons forward end fuselage sure check its alignment above front Cut re slot vertical fin post fit rear stabilizer spar Glue vertical w w rAbsolutely Positively Bullet Proof 6OfBB 157H 078w x 161L 77 in/oz 16 sec Also available 605MGmetal gear tlrot 550 cuctoreer Order Supreme receiver wilt receive FREE BeItetPrvvf ret Absolutely Positively Bullet-Proof BUT DONT TAO IT LITERALLY ENIW C ServoB U FTJTABA G U EUTABA Y Apollo Cot Size Inches Wt Slot ROSES Type ec Ii p W c L Terlue 4BV Speed 4 September 1994 39 Hitec RCD Does Once Again new 8 Channel FM Supreme RICa SMALLER IdgIloBeir 7-ch EXs yet have tighter adjacent channel7O5liB METAL BEAR rejection higher 301P rejection20H 011W x 231 & sensitivIty tlntroductory 160 ifl/OZ 27 sec Price $7995 0he New Supreme Series Rzs require 0 hsruess utiliue 8th chsuuel RCD rmation u dealer nearest tall 619 2584940 0729 Put~tnds Ave Suite c CA 92071 SPORT PACK55414058p1617542uz019 Sec PRO-PACK15414 u0801617543 uz000 Sec ELECTRO-GUDE20312 u051309304 az000 Sec GIANT PACK15300011u233601335z002 Sec wII aid servo 10 55 1 14 08 16 170 43 uz 020 Sec SUS-MICK 0431105 tO 062 31 sz 5 4 fin onto stabilizer fuselage rear vertical fin post should flush end fuselage Drill 3A2 hole through vertical fin post centerline stabilizer flush rear stabilizer spar Feed /32 music wire connects two elevator halves through hole Install elevator hinges making sure line up same time glue connector wire holes elevators Install lower rudder hinge tail wheel assembly upper rudder hinge Make two pushrods hard re balsa 3A6 birch dowel install threaded rod Kwik-Links control surface ends will have put Z bends exit fuselage Attach Kwik-Links control surfaces fit front threaded rods Kwik-Links servos wrap threaded rod thread apply generous coating AmbroidWhile pushrods still place install 3A2 sheet goes both fuselage sides below stabilizer pushrods cannot removed fuselage unless make very large exit holes just leave Install engine decide way engine servo should mounted Drill hole firewall install nylon tubing Solder threaded connectors end cable Hook up throttle end feed cable servo cut appropriate length allowing threaded connector Kwik-Link necessary support nylon tubing couple points ensure functions properly Glue hollowed-out balsa block between firewall former F3 well balsa blocks around engine Leave enough room around engine have easy access engine mounting bolts free motion throttle arm its Kwik-Link point must decide whether mount top wing before after its covered designed 2/3 wing strut sandwiches top wing could covered painted before mounted lot room between wings using iron-on-covering wing can covered struts covered separately will need cut holes sheeting glue sandwiches spars recover holes Once wing mounted make four outer wing struts /I6 x wood Make eight aluminum plates drill lot 1A6 holes Use coping saw cut slot end struts accept plates Smear epoxy plates slots slip plates slots careful get epoxy exterior wood Use some burnt umber staln color struts give coat clear dope Slip strut top metal fitting leaving about /&i clearance between wing mark bolt position drill 3A2 hole through fitting strut Install 2-56 bolt nut lower end strut should fit nicely metal fitting top lower wing again leaving about 3/M clearance strut should put pressure wings Once fits drill 32 hole install 2-56 bolt procedure should repeated outer struts Covering On trip Japan asked wife stop hobby shop buy several yards silk went number hobby shops carried desperation bought some lightweight silk used make doll dresses used cover fuselage tail feathers put wet after dry brushed several coats clear dope sprayed silver initially appeared reasonably tight after short time crackup became loose baggy decided recover parts give model well worn look Im sure Moths must have appeared way after years hard service wings covered regular model silk have stayed smooth made engine cowl photographic purposes dont use flying put two-inch-scale Williams Brothers pilot rear cockpit Since biplane pilots look forward over side landing glue pilots head look direction Flying To take off advance throttle slowly plane will trundle along until tail comes off ground will roll along until just tap up elevator will begin steady climb little no additional up Once comfortable altitude throttle back halfway Like its full-size counterpart model requires coordinated rudder elevator aileron make proper turns turns aileron alone tend look pretty sloppy loop just dive bit buildup little extra speed pull back stick Moth will just putt-putt top loop down backside what appears slow motion Loops snap top accomplished giving full rudder elevator just before top ioop releasing about halfway through snap spin gain some altitude pull up sharply speed bleeds off give either full right left rudder full up elevator Moth spins equal facility both left right Slow rolls done building up little speed pulling up feeding aileron some rudder until rate roll established remainder roll accomplished elevator favorite pastimes take Moth flying field just before sun sets wingovers down sun low altitude Just get peak wingover sun glints off silver wing red letters look like spotlighted Landings joy behold Throttle back point engine just ticking over make standard rectangular approach model gets about 18 inches off ground hold level will float what seems like forever wheels finally touch down grass will roll another 10 yards before tail settles down pilots point view Gipsy Moth totally predictable never does anything untoward never does thing unexpected completely controllable attitudes does everything slow stately manner sharp contrast other models Moth maneuvers lowest possible throttle setting adds considerably realism flight Since built Gipsy Moth OS has replaced OS 20 four-stroke 26 Surpass Fortunately fits same engine mounts has same bolt-hole pattern 26 Surpass Gipsy Moth slightly overpowered As result spend some time adjusting throttle until get lowest possible reliable idle Otherwise will never land aircraft have designed built Moth fun fly always taxi back pits big grin fellow MARCS members never fail comment realistically Moth flies much fun watch go through its paces amazed much fun can 20 fourstroke engine half throttle 50-inch biplane Gipsy Moth has hundreds flights just plain fun hope enjoy much have * 40 Model Aviation ory Authorized E-Z UP Corp Dealer 1UXIU IUXID John Peck Leisure Productstg6068735172 131 RAVENWOOD RD AILLES KY 40383
Edition: Model Aviation - 1994/09
Page Numbers: 33, 34, 35, 36, 37, 38, 39, 40
he Moth biplane designed Geoffrey de Havilland 1925 sport aircraft Gipsy Moth created 1928 replacing original Airdisco engine Halforckdesigned 100 hp Gipsy engine Gipsy Moth instant success nd 1162 manufactured manufactured US Moth Aircraft Corporation f America thus earning US-approved type certificate During late 1920s early 1930s amazing long distanc ffights made Gipsy Moths included Amy Johnsons solo flight London and Australia Lady Baileys 18000 mile solo flight around Africa Lt Bentleys solo flight London Capetown South Africa Gipsy Moth recently featured movie Out Africa Unfortunately no Gipsy Moths left US British have purchased returned homeland However fellow California reputed converting Tiger Moths back Gipsy Moths number years ago beautiful all-white Gipsy Moth temporarily housed hangar next between EAA convention Bkkesburg Frank B Baker September 1994 33 AAA fly-in small size rather fragile beauty plane anchored itself back mind did come fore until purchased OS 20 four-stroke engine started thinking about biplanes Gipsy Moth became obvious plane build Arbitrarily selecting 50-inch wingspan enlarged excellent set threeviews appeared Aeromodeller result moderately sized model ideally matched its power plant 9 x 6 prop CONSTRUCTION standards Gipsy Moth particularly light model should take pains keep weight down Use epoxy very sparingly some reason adds weight very insidious manner Choosing weight balsa consistent its use also important Wings Since wings easiest part model will needed build fuselage lets start wing spars consist top bottom x ce balsa sandwiched between Use aliphatic resin glue laminate spars sure secure manner will ensure straight Note balsa spacer does go root rib plywood dihedral brace slips Since wings longer standard 48-inch strip make spars wing panel cut spruce pieces short center section Make wing ribs stacking /16 balsa blanks cutting band saw usually make ribs wing panel time Although plans show false rib between full rib did put just adds weight work Once ribs have cut lay out complete wing building board pin three segments spar place important keep three segments properly aligned problems arise putting dihedral braces remainder wing construction Left The Moth covered silk Finish silver dope sprayed over brushed-on clear dope base Below The Moth flies realistically predictably Turns require coordinated rudder elevator aileron V standard however will need trim ribs Y16 sheet used root end wing panels install sheeting top wing until wing cabane struts have fitted Once wing panels have built laminate 1/ x ce spar caps four dihedral braces trim fit holes wing spars Glue center section spar stubs slide holes wing panel spars block up wings get 12 inches dihedral outer 34 Model Aviafion 4 end rear spar After checking wings equal dihedral no twist let glue dry overnight Once panels have joined use razor saw cut rib 2 plywood dihedral plates cam glued front back spar eight 3A2 balsa center ribs can split lengthwise glued center section top wing top center section sheeted 42 provide sturdy hand hold no center section ribs lower wing spars glue directly fuselage Note ailerons lower wing like use nylon tubing bronze cable y Lobby HLH 805 actuate ailerons Bring nylon tubing forward per plans get large smooth-radius turn tubing makes 900 turn aileron will result smoothly functioning aileron personal preference use continuous length aileron cable Z piece wire soldered center hook onto servo arm install nylon tubing cable until lower wing has glued fuselagethe tubing runs fusleage cable runs through Cut eight outer wing strut supports some 015 aluminum sheet bend per plans drill bolt holes Use some soft copper wire bind strut supports wing spars sure top strut fittings point down bottom fittings point up Put liberal amount Ambroid glue over wire fittings cut slits /16 sheet goes over fittings glue sheets between appropriate ribs sheeting will provide place anchor covering area brackets end result about 5/ inch metal will out open Fuselage Build two fuselage sides directly over plans sure use hardest 3/is square balsa can find top bottom longerons install 3A6 sheet triangles rear cockpit until sides have joined Glue A2 plywood doubler inside fuselage side using epoxy Make plywood firewall cut holes engine mounts drill gas tank holes Lay firewall flat surface use epoxy glue maple engine mount beams Use several metal triangles insure beams 900 firewall no down thrust side thrust Epoxy /i plywood front beam former place Lay two fuselage sides top down flat surface about /2 inch front extending over end pin block straight Glue /6 square top bottom crosspieces F4 eventually goes Glue former B3 /l6 sheet grain crosswise goes B3 /l6 square crosspiece glue tail posts together Set fuselage aside make fuel tank like make own tanks K&S #254 easy solder tin sheet Make pattern doubling half-scale pattern plans cut tin accordingly Solder tank such rear can left open Cut lengths er tubing get auto-supply houses make two vents fuel line Run fuel line bottom center rear tank solder floor tank sure have soldered shut Leave three tubes coming straight out front tank solder both inside outside tank Close up back tank solder shut Use thinner some other solvent remove soldering paste Fill bucket water check tank leaks Once tank leak free drill holes firewall allow three tubes pass through Slip tubes partially through firewall put bit epoxy between tank firewall push tank forward hold until epoxy has set Bend center fuel line upward cut off leave about Y2 inch straight tubing fuel line slide scheme makes lot easier run fuel line carburetor back fourstroke engine Epoxy firewall assembly fuselage sides Again sure no down side thrust Glue / sheet tank support bottom tank top wing cabane struts built next September 1994 35 Basswood tail surface outlines laminated 1/16 strips soaked water wrapped around plywood forms Wing strut sandwiches designed allow addition top wing either before after covering Moths lower wing has 20 incidence top wing set 30 Robart incidence meter used set angles properly Bend / music wire per plans struts will attached fuselage using plywood sandwich has wire middle attach wings 2A sandwich wing spar forms third layer Cut sandwich centers 1/ plywood cut slot fit Vs music wire Cut back sandwich fuselage end wing ends 1/16 plywood Lay three Y16 plywood plates flat surface coat some slow-cure epoxy Lay c wire down fit /i plywood center pieces around put some epoxy sure fill space between wire plywood rear cabane strut lay down top 1/16 plywood plate wire goes across fuselage front cabane strut fuselage sandwich top plate consists former F3 1/8 Lite Ply wing ends cabane struts lay some plastic film over epoxy place weights three sandwiches both struts sure check plates have slid weights placed Remove fuselage building board Make two As plywood rear cabane strut fuselage doublers Glue front cabane strut sandwich F3 making sure 900 top fuselage let glue set Block up fuselage workbench set top longeron fuselage 00 Use some small C-clamps hold 2A sandwiches wing ends front cabane strut front front wing spar Loosely assemble rear cabane sandwich /is doublers Apply some slow curing epoxy glue slip assembly fuselage Again use some small Cclamps hold 2/3 sandwiches tops cabane struts front rear spar Use Robart incidence meter set top wing 300d incidence Slide fuselage end rear cabane strut doublers up down until proper incidence obtained important also measure wingtips workbench surface make sure wing sitting level use some Cclamps hold A6 plywood doublers fuselage sides Leave room until glue has set Although plans show sharp break rear cockpit cut longerons achieve break Simply glue tail posts together let longerons take natural bend may have make F5-F7 bit wider accommodate bend Glue top bottom 3/is square crosspieces vertical fuselage formers F4a-F7 After have glued top fuselage stringers use round file remove balsa between tops stringers better-looking fuselage Rough-cut balsa block fit between firewall former F3 carve shape Note firewall has square top transitions half-round F3 Hollow block glue Bend front cabane support wire make plywood sandwich Use soft copper wire bind top strut front cabane strut glue sandwich fuselage glue has set solder copper wire two struts careful overheat wire 2/3 sandwich could loosened top wing can now removed might well make cockpit hatch cover time simply A2 plywood floor formers 3A2 sheet bent over formers 1/ square spruce stringers add some strength prevent cockpit edges getting beat up due handling Bend two landing gear wires glue plywood sandwiches 36 Model Aviation leted framework ready cover 50-inch span proved idea match OS 20 26 9 x 6 prop Only lower wing has ailerons Author prefers use nylon tubing single length bronze cable Two-inch scale Williams Brothers pilot installed its head positioned would landing Cli I-i Type RO Scale Wingspan 50 inches Engine OS 20-26 Number channels Four Flying weight 68 ounces Construction Built-up Covering/finish Silk dope 1%uuu- PRANK 3AKR LniNrnED4-AS8 WOOD N N N N 1--- LPMINPThfl - SOPASS WOOD 5rNGRS MLJSC NIREN - AILISIC MFE FLY7 7 7 BLSfl BLOCKSMT JMUSC WRE 3 LVLLMSRO5 NN 7 32 1IIE GPSY-k1oTHER SEEs ALL AMThLL5 ALL FOR C OO Pt/ANT Th flv ]L& FurL/RE OF Th ETTz JEtJ 9LLAop oqCyEp CAJE CrOU DiMT FOoL /IE TO INSTANT INM PLSR RI&5TbUE NOT G77AJ ANY OF frW I-ION Ey/ OI Too &u, PEAD M CAt IN YOuR FUTURS WILL 7 TAKE AIASTER CI4ARE TE II TE ~LL IcL-r II NLN WOOD~ N N N jx RLSP k C CD CD CCD 0 0 CA -J Full-Size Plans AvailableSee Page 160 N 0 FU Iw a~i1 01 H~iI_ I~ CUa-U u\0Ia III ~0 2 Lwn 2 aI I b Ill __ 2/l aad tiIa aII 2][b472177704415280]]-~CD ia~ CaIS00 4Q4 U \4tIII18 _K 0II wII II 2 I~ 0 I HHI W LLU a-iTT~a II 8 Model Aviation l some working room lets take care servo installation First fit lower wing fuselage Use razor saw cut slots lower fuselage accept lower wing spars Note rear spar out open trailing edge wing quite bit below bottom fuselage because full-size Gipsy Moth folding wings folded lower wing trailing edge went under fuselage sure adjust slots lower wing has 20 incidence glue wing fuselage should some space between root rib fuselage side allow covering rib fuselage side Measure wingtips ensure lower wing level Use some epoxy glue main landing gear plywood sandwich fuselage forward lower wing spar Use piece 3/33 sheet balsa serve pattern aileron servo platform Trim until will fit between main landing gear plywood sandwich B3 Once fits duplicate /32 plywood glue place Make some 3/33 x ood strips width fuselage glue 1A6 below edge lower longerons front spar B3 serve screw plates servo hatch cover Make servo hatch cover 1Ao plywood sure build some curvature hatch cover hold some small glued-on strips matches lower longeron curvature Mount three servos side-by-side servo mount two -inch strips /i plywood slip 3/s-square maple servo mount rails fuselage slip three servos fuselage Mark screw holes e rails Pull servos rails out screw together Slip whole unit glue rails fuselage side former B3 Adjust position rails until bottoms three servos about /o inch above aileron servo plate sure rails parallel top longerons Now bottom fuselage can finished Clamp plywood sandwich forward 3A2 music wire landing gear back fuselage Measure main landing gear wire allow bend Remove unit bend ends wires Some trial-and-error bending twisting will needed until bends fit front main gear wire Once done epoxy plywood sandwich rear firewall wrap wires copper wire solder front supports main gear wire Solder two strips brass shim stock main landing gear leg glue airfoil-shaped balsa fairings Glue 3Ao sheet cross-grain firewall main landing gear sandwich Tail tail feathers standard construction Note ear post vertical fin goes way bottom fuselage Just looks used old free flight technique make curved outline pieces Cut pieces ood inner shape five empennage parts Soak lengths /16 square basswood water bend around form hold place masking tape Using white glue laminate four layers horizontal plane until outline YI6 thick Let glue dry day remove outlines forms Use small block plane smooth surface result will beautiful outline both strong light seems like too much work just cut outlines Ve6 sheet balsa lower rudder hinge fabricated 010 brass shim stock Wrap brass shim stock around 1A6 music wire solder shim stock together wire Remove wire use file remove appropriate metal result should look just like standard Du-Bro Klett nylon hinge Bend length Ve6 music wire fit 1 tail wheel Run wire through nylon Goldberg tail wheel bracket through brass hinge assembly Make 900 bend rear cut off per plans Use razor saw cut ical slot tail post fuselage Glue stabilizer top longerons forward end fuselage sure check its alignment above front Cut re slot vertical fin post fit rear stabilizer spar Glue vertical w w rAbsolutely Positively Bullet Proof 6OfBB 157H 078w x 161L 77 in/oz 16 sec Also available 605MGmetal gear tlrot 550 cuctoreer Order Supreme receiver wilt receive FREE BeItetPrvvf ret Absolutely Positively Bullet-Proof BUT DONT TAO IT LITERALLY ENIW C ServoB U FTJTABA G U EUTABA Y Apollo Cot Size Inches Wt Slot ROSES Type ec Ii p W c L Terlue 4BV Speed 4 September 1994 39 Hitec RCD Does Once Again new 8 Channel FM Supreme RICa SMALLER IdgIloBeir 7-ch EXs yet have tighter adjacent channel7O5liB METAL BEAR rejection higher 301P rejection20H 011W x 231 & sensitivIty tlntroductory 160 ifl/OZ 27 sec Price $7995 0he New Supreme Series Rzs require 0 hsruess utiliue 8th chsuuel RCD rmation u dealer nearest tall 619 2584940 0729 Put~tnds Ave Suite c CA 92071 SPORT PACK55414058p1617542uz019 Sec PRO-PACK15414 u0801617543 uz000 Sec ELECTRO-GUDE20312 u051309304 az000 Sec GIANT PACK15300011u233601335z002 Sec wII aid servo 10 55 1 14 08 16 170 43 uz 020 Sec SUS-MICK 0431105 tO 062 31 sz 5 4 fin onto stabilizer fuselage rear vertical fin post should flush end fuselage Drill 3A2 hole through vertical fin post centerline stabilizer flush rear stabilizer spar Feed /32 music wire connects two elevator halves through hole Install elevator hinges making sure line up same time glue connector wire holes elevators Install lower rudder hinge tail wheel assembly upper rudder hinge Make two pushrods hard re balsa 3A6 birch dowel install threaded rod Kwik-Links control surface ends will have put Z bends exit fuselage Attach Kwik-Links control surfaces fit front threaded rods Kwik-Links servos wrap threaded rod thread apply generous coating AmbroidWhile pushrods still place install 3A2 sheet goes both fuselage sides below stabilizer pushrods cannot removed fuselage unless make very large exit holes just leave Install engine decide way engine servo should mounted Drill hole firewall install nylon tubing Solder threaded connectors end cable Hook up throttle end feed cable servo cut appropriate length allowing threaded connector Kwik-Link necessary support nylon tubing couple points ensure functions properly Glue hollowed-out balsa block between firewall former F3 well balsa blocks around engine Leave enough room around engine have easy access engine mounting bolts free motion throttle arm its Kwik-Link point must decide whether mount top wing before after its covered designed 2/3 wing strut sandwiches top wing could covered painted before mounted lot room between wings using iron-on-covering wing can covered struts covered separately will need cut holes sheeting glue sandwiches spars recover holes Once wing mounted make four outer wing struts /I6 x wood Make eight aluminum plates drill lot 1A6 holes Use coping saw cut slot end struts accept plates Smear epoxy plates slots slip plates slots careful get epoxy exterior wood Use some burnt umber staln color struts give coat clear dope Slip strut top metal fitting leaving about /&i clearance between wing mark bolt position drill 3A2 hole through fitting strut Install 2-56 bolt nut lower end strut should fit nicely metal fitting top lower wing again leaving about 3/M clearance strut should put pressure wings Once fits drill 32 hole install 2-56 bolt procedure should repeated outer struts Covering On trip Japan asked wife stop hobby shop buy several yards silk went number hobby shops carried desperation bought some lightweight silk used make doll dresses used cover fuselage tail feathers put wet after dry brushed several coats clear dope sprayed silver initially appeared reasonably tight after short time crackup became loose baggy decided recover parts give model well worn look Im sure Moths must have appeared way after years hard service wings covered regular model silk have stayed smooth made engine cowl photographic purposes dont use flying put two-inch-scale Williams Brothers pilot rear cockpit Since biplane pilots look forward over side landing glue pilots head look direction Flying To take off advance throttle slowly plane will trundle along until tail comes off ground will roll along until just tap up elevator will begin steady climb little no additional up Once comfortable altitude throttle back halfway Like its full-size counterpart model requires coordinated rudder elevator aileron make proper turns turns aileron alone tend look pretty sloppy loop just dive bit buildup little extra speed pull back stick Moth will just putt-putt top loop down backside what appears slow motion Loops snap top accomplished giving full rudder elevator just before top ioop releasing about halfway through snap spin gain some altitude pull up sharply speed bleeds off give either full right left rudder full up elevator Moth spins equal facility both left right Slow rolls done building up little speed pulling up feeding aileron some rudder until rate roll established remainder roll accomplished elevator favorite pastimes take Moth flying field just before sun sets wingovers down sun low altitude Just get peak wingover sun glints off silver wing red letters look like spotlighted Landings joy behold Throttle back point engine just ticking over make standard rectangular approach model gets about 18 inches off ground hold level will float what seems like forever wheels finally touch down grass will roll another 10 yards before tail settles down pilots point view Gipsy Moth totally predictable never does anything untoward never does thing unexpected completely controllable attitudes does everything slow stately manner sharp contrast other models Moth maneuvers lowest possible throttle setting adds considerably realism flight Since built Gipsy Moth OS has replaced OS 20 four-stroke 26 Surpass Fortunately fits same engine mounts has same bolt-hole pattern 26 Surpass Gipsy Moth slightly overpowered As result spend some time adjusting throttle until get lowest possible reliable idle Otherwise will never land aircraft have designed built Moth fun fly always taxi back pits big grin fellow MARCS members never fail comment realistically Moth flies much fun watch go through its paces amazed much fun can 20 fourstroke engine half throttle 50-inch biplane Gipsy Moth has hundreds flights just plain fun hope enjoy much have * 40 Model Aviation ory Authorized E-Z UP Corp Dealer 1UXIU IUXID John Peck Leisure Productstg6068735172 131 RAVENWOOD RD AILLES KY 40383
Edition: Model Aviation - 1994/09
Page Numbers: 33, 34, 35, 36, 37, 38, 39, 40
he Moth biplane designed Geoffrey de Havilland 1925 sport aircraft Gipsy Moth created 1928 replacing original Airdisco engine Halforckdesigned 100 hp Gipsy engine Gipsy Moth instant success nd 1162 manufactured manufactured US Moth Aircraft Corporation f America thus earning US-approved type certificate During late 1920s early 1930s amazing long distanc ffights made Gipsy Moths included Amy Johnsons solo flight London and Australia Lady Baileys 18000 mile solo flight around Africa Lt Bentleys solo flight London Capetown South Africa Gipsy Moth recently featured movie Out Africa Unfortunately no Gipsy Moths left US British have purchased returned homeland However fellow California reputed converting Tiger Moths back Gipsy Moths number years ago beautiful all-white Gipsy Moth temporarily housed hangar next between EAA convention Bkkesburg Frank B Baker September 1994 33 AAA fly-in small size rather fragile beauty plane anchored itself back mind did come fore until purchased OS 20 four-stroke engine started thinking about biplanes Gipsy Moth became obvious plane build Arbitrarily selecting 50-inch wingspan enlarged excellent set threeviews appeared Aeromodeller result moderately sized model ideally matched its power plant 9 x 6 prop CONSTRUCTION standards Gipsy Moth particularly light model should take pains keep weight down Use epoxy very sparingly some reason adds weight very insidious manner Choosing weight balsa consistent its use also important Wings Since wings easiest part model will needed build fuselage lets start wing spars consist top bottom x ce balsa sandwiched between Use aliphatic resin glue laminate spars sure secure manner will ensure straight Note balsa spacer does go root rib plywood dihedral brace slips Since wings longer standard 48-inch strip make spars wing panel cut spruce pieces short center section Make wing ribs stacking /16 balsa blanks cutting band saw usually make ribs wing panel time Although plans show false rib between full rib did put just adds weight work Once ribs have cut lay out complete wing building board pin three segments spar place important keep three segments properly aligned problems arise putting dihedral braces remainder wing construction Left The Moth covered silk Finish silver dope sprayed over brushed-on clear dope base Below The Moth flies realistically predictably Turns require coordinated rudder elevator aileron V standard however will need trim ribs Y16 sheet used root end wing panels install sheeting top wing until wing cabane struts have fitted Once wing panels have built laminate 1/ x ce spar caps four dihedral braces trim fit holes wing spars Glue center section spar stubs slide holes wing panel spars block up wings get 12 inches dihedral outer 34 Model Aviafion 4 end rear spar After checking wings equal dihedral no twist let glue dry overnight Once panels have joined use razor saw cut rib 2 plywood dihedral plates cam glued front back spar eight 3A2 balsa center ribs can split lengthwise glued center section top wing top center section sheeted 42 provide sturdy hand hold no center section ribs lower wing spars glue directly fuselage Note ailerons lower wing like use nylon tubing bronze cable y Lobby HLH 805 actuate ailerons Bring nylon tubing forward per plans get large smooth-radius turn tubing makes 900 turn aileron will result smoothly functioning aileron personal preference use continuous length aileron cable Z piece wire soldered center hook onto servo arm install nylon tubing cable until lower wing has glued fuselagethe tubing runs fusleage cable runs through Cut eight outer wing strut supports some 015 aluminum sheet bend per plans drill bolt holes Use some soft copper wire bind strut supports wing spars sure top strut fittings point down bottom fittings point up Put liberal amount Ambroid glue over wire fittings cut slits /16 sheet goes over fittings glue sheets between appropriate ribs sheeting will provide place anchor covering area brackets end result about 5/ inch metal will out open Fuselage Build two fuselage sides directly over plans sure use hardest 3/is square balsa can find top bottom longerons install 3A6 sheet triangles rear cockpit until sides have joined Glue A2 plywood doubler inside fuselage side using epoxy Make plywood firewall cut holes engine mounts drill gas tank holes Lay firewall flat surface use epoxy glue maple engine mount beams Use several metal triangles insure beams 900 firewall no down thrust side thrust Epoxy /i plywood front beam former place Lay two fuselage sides top down flat surface about /2 inch front extending over end pin block straight Glue /6 square top bottom crosspieces F4 eventually goes Glue former B3 /l6 sheet grain crosswise goes B3 /l6 square crosspiece glue tail posts together Set fuselage aside make fuel tank like make own tanks K&S #254 easy solder tin sheet Make pattern doubling half-scale pattern plans cut tin accordingly Solder tank such rear can left open Cut lengths er tubing get auto-supply houses make two vents fuel line Run fuel line bottom center rear tank solder floor tank sure have soldered shut Leave three tubes coming straight out front tank solder both inside outside tank Close up back tank solder shut Use thinner some other solvent remove soldering paste Fill bucket water check tank leaks Once tank leak free drill holes firewall allow three tubes pass through Slip tubes partially through firewall put bit epoxy between tank firewall push tank forward hold until epoxy has set Bend center fuel line upward cut off leave about Y2 inch straight tubing fuel line slide scheme makes lot easier run fuel line carburetor back fourstroke engine Epoxy firewall assembly fuselage sides Again sure no down side thrust Glue / sheet tank support bottom tank top wing cabane struts built next September 1994 35 Basswood tail surface outlines laminated 1/16 strips soaked water wrapped around plywood forms Wing strut sandwiches designed allow addition top wing either before after covering Moths lower wing has 20 incidence top wing set 30 Robart incidence meter used set angles properly Bend / music wire per plans struts will attached fuselage using plywood sandwich has wire middle attach wings 2A sandwich wing spar forms third layer Cut sandwich centers 1/ plywood cut slot fit Vs music wire Cut back sandwich fuselage end wing ends 1/16 plywood Lay three Y16 plywood plates flat surface coat some slow-cure epoxy Lay c wire down fit /i plywood center pieces around put some epoxy sure fill space between wire plywood rear cabane strut lay down top 1/16 plywood plate wire goes across fuselage front cabane strut fuselage sandwich top plate consists former F3 1/8 Lite Ply wing ends cabane struts lay some plastic film over epoxy place weights three sandwiches both struts sure check plates have slid weights placed Remove fuselage building board Make two As plywood rear cabane strut fuselage doublers Glue front cabane strut sandwich F3 making sure 900 top fuselage let glue set Block up fuselage workbench set top longeron fuselage 00 Use some small C-clamps hold 2A sandwiches wing ends front cabane strut front front wing spar Loosely assemble rear cabane sandwich /is doublers Apply some slow curing epoxy glue slip assembly fuselage Again use some small Cclamps hold 2/3 sandwiches tops cabane struts front rear spar Use Robart incidence meter set top wing 300d incidence Slide fuselage end rear cabane strut doublers up down until proper incidence obtained important also measure wingtips workbench surface make sure wing sitting level use some Cclamps hold A6 plywood doublers fuselage sides Leave room until glue has set Although plans show sharp break rear cockpit cut longerons achieve break Simply glue tail posts together let longerons take natural bend may have make F5-F7 bit wider accommodate bend Glue top bottom 3/is square crosspieces vertical fuselage formers F4a-F7 After have glued top fuselage stringers use round file remove balsa between tops stringers better-looking fuselage Rough-cut balsa block fit between firewall former F3 carve shape Note firewall has square top transitions half-round F3 Hollow block glue Bend front cabane support wire make plywood sandwich Use soft copper wire bind top strut front cabane strut glue sandwich fuselage glue has set solder copper wire two struts careful overheat wire 2/3 sandwich could loosened top wing can now removed might well make cockpit hatch cover time simply A2 plywood floor formers 3A2 sheet bent over formers 1/ square spruce stringers add some strength prevent cockpit edges getting beat up due handling Bend two landing gear wires glue plywood sandwiches 36 Model Aviation leted framework ready cover 50-inch span proved idea match OS 20 26 9 x 6 prop Only lower wing has ailerons Author prefers use nylon tubing single length bronze cable Two-inch scale Williams Brothers pilot installed its head positioned would landing Cli I-i Type RO Scale Wingspan 50 inches Engine OS 20-26 Number channels Four Flying weight 68 ounces Construction Built-up Covering/finish Silk dope 1%uuu- PRANK 3AKR LniNrnED4-AS8 WOOD N N N N 1--- LPMINPThfl - SOPASS WOOD 5rNGRS MLJSC NIREN - AILISIC MFE FLY7 7 7 BLSfl BLOCKSMT JMUSC WRE 3 LVLLMSRO5 NN 7 32 1IIE GPSY-k1oTHER SEEs ALL AMThLL5 ALL FOR C OO Pt/ANT Th flv ]L& FurL/RE OF Th ETTz JEtJ 9LLAop oqCyEp CAJE CrOU DiMT FOoL /IE TO INSTANT INM PLSR RI&5TbUE NOT G77AJ ANY OF frW I-ION Ey/ OI Too &u, PEAD M CAt IN YOuR FUTURS WILL 7 TAKE AIASTER CI4ARE TE II TE ~LL IcL-r II NLN WOOD~ N N N jx RLSP k C CD CD CCD 0 0 CA -J Full-Size Plans AvailableSee Page 160 N 0 FU Iw a~i1 01 H~iI_ I~ CUa-U u\0Ia III ~0 2 Lwn 2 aI I b Ill __ 2/l aad tiIa aII 2][b472177704415280]]-~CD ia~ CaIS00 4Q4 U \4tIII18 _K 0II wII II 2 I~ 0 I HHI W LLU a-iTT~a II 8 Model Aviation l some working room lets take care servo installation First fit lower wing fuselage Use razor saw cut slots lower fuselage accept lower wing spars Note rear spar out open trailing edge wing quite bit below bottom fuselage because full-size Gipsy Moth folding wings folded lower wing trailing edge went under fuselage sure adjust slots lower wing has 20 incidence glue wing fuselage should some space between root rib fuselage side allow covering rib fuselage side Measure wingtips ensure lower wing level Use some epoxy glue main landing gear plywood sandwich fuselage forward lower wing spar Use piece 3/33 sheet balsa serve pattern aileron servo platform Trim until will fit between main landing gear plywood sandwich B3 Once fits duplicate /32 plywood glue place Make some 3/33 x ood strips width fuselage glue 1A6 below edge lower longerons front spar B3 serve screw plates servo hatch cover Make servo hatch cover 1Ao plywood sure build some curvature hatch cover hold some small glued-on strips matches lower longeron curvature Mount three servos side-by-side servo mount two -inch strips /i plywood slip 3/s-square maple servo mount rails fuselage slip three servos fuselage Mark screw holes e rails Pull servos rails out screw together Slip whole unit glue rails fuselage side former B3 Adjust position rails until bottoms three servos about /o inch above aileron servo plate sure rails parallel top longerons Now bottom fuselage can finished Clamp plywood sandwich forward 3A2 music wire landing gear back fuselage Measure main landing gear wire allow bend Remove unit bend ends wires Some trial-and-error bending twisting will needed until bends fit front main gear wire Once done epoxy plywood sandwich rear firewall wrap wires copper wire solder front supports main gear wire Solder two strips brass shim stock main landing gear leg glue airfoil-shaped balsa fairings Glue 3Ao sheet cross-grain firewall main landing gear sandwich Tail tail feathers standard construction Note ear post vertical fin goes way bottom fuselage Just looks used old free flight technique make curved outline pieces Cut pieces ood inner shape five empennage parts Soak lengths /16 square basswood water bend around form hold place masking tape Using white glue laminate four layers horizontal plane until outline YI6 thick Let glue dry day remove outlines forms Use small block plane smooth surface result will beautiful outline both strong light seems like too much work just cut outlines Ve6 sheet balsa lower rudder hinge fabricated 010 brass shim stock Wrap brass shim stock around 1A6 music wire solder shim stock together wire Remove wire use file remove appropriate metal result should look just like standard Du-Bro Klett nylon hinge Bend length Ve6 music wire fit 1 tail wheel Run wire through nylon Goldberg tail wheel bracket through brass hinge assembly Make 900 bend rear cut off per plans Use razor saw cut ical slot tail post fuselage Glue stabilizer top longerons forward end fuselage sure check its alignment above front Cut re slot vertical fin post fit rear stabilizer spar Glue vertical w w rAbsolutely Positively Bullet Proof 6OfBB 157H 078w x 161L 77 in/oz 16 sec Also available 605MGmetal gear tlrot 550 cuctoreer Order Supreme receiver wilt receive FREE BeItetPrvvf ret Absolutely Positively Bullet-Proof BUT DONT TAO IT LITERALLY ENIW C ServoB U FTJTABA G U EUTABA Y Apollo Cot Size Inches Wt Slot ROSES Type ec Ii p W c L Terlue 4BV Speed 4 September 1994 39 Hitec RCD Does Once Again new 8 Channel FM Supreme RICa SMALLER IdgIloBeir 7-ch EXs yet have tighter adjacent channel7O5liB METAL BEAR rejection higher 301P rejection20H 011W x 231 & sensitivIty tlntroductory 160 ifl/OZ 27 sec Price $7995 0he New Supreme Series Rzs require 0 hsruess utiliue 8th chsuuel RCD rmation u dealer nearest tall 619 2584940 0729 Put~tnds Ave Suite c CA 92071 SPORT PACK55414058p1617542uz019 Sec PRO-PACK15414 u0801617543 uz000 Sec ELECTRO-GUDE20312 u051309304 az000 Sec GIANT PACK15300011u233601335z002 Sec wII aid servo 10 55 1 14 08 16 170 43 uz 020 Sec SUS-MICK 0431105 tO 062 31 sz 5 4 fin onto stabilizer fuselage rear vertical fin post should flush end fuselage Drill 3A2 hole through vertical fin post centerline stabilizer flush rear stabilizer spar Feed /32 music wire connects two elevator halves through hole Install elevator hinges making sure line up same time glue connector wire holes elevators Install lower rudder hinge tail wheel assembly upper rudder hinge Make two pushrods hard re balsa 3A6 birch dowel install threaded rod Kwik-Links control surface ends will have put Z bends exit fuselage Attach Kwik-Links control surfaces fit front threaded rods Kwik-Links servos wrap threaded rod thread apply generous coating AmbroidWhile pushrods still place install 3A2 sheet goes both fuselage sides below stabilizer pushrods cannot removed fuselage unless make very large exit holes just leave Install engine decide way engine servo should mounted Drill hole firewall install nylon tubing Solder threaded connectors end cable Hook up throttle end feed cable servo cut appropriate length allowing threaded connector Kwik-Link necessary support nylon tubing couple points ensure functions properly Glue hollowed-out balsa block between firewall former F3 well balsa blocks around engine Leave enough room around engine have easy access engine mounting bolts free motion throttle arm its Kwik-Link point must decide whether mount top wing before after its covered designed 2/3 wing strut sandwiches top wing could covered painted before mounted lot room between wings using iron-on-covering wing can covered struts covered separately will need cut holes sheeting glue sandwiches spars recover holes Once wing mounted make four outer wing struts /I6 x wood Make eight aluminum plates drill lot 1A6 holes Use coping saw cut slot end struts accept plates Smear epoxy plates slots slip plates slots careful get epoxy exterior wood Use some burnt umber staln color struts give coat clear dope Slip strut top metal fitting leaving about /&i clearance between wing mark bolt position drill 3A2 hole through fitting strut Install 2-56 bolt nut lower end strut should fit nicely metal fitting top lower wing again leaving about 3/M clearance strut should put pressure wings Once fits drill 32 hole install 2-56 bolt procedure should repeated outer struts Covering On trip Japan asked wife stop hobby shop buy several yards silk went number hobby shops carried desperation bought some lightweight silk used make doll dresses used cover fuselage tail feathers put wet after dry brushed several coats clear dope sprayed silver initially appeared reasonably tight after short time crackup became loose baggy decided recover parts give model well worn look Im sure Moths must have appeared way after years hard service wings covered regular model silk have stayed smooth made engine cowl photographic purposes dont use flying put two-inch-scale Williams Brothers pilot rear cockpit Since biplane pilots look forward over side landing glue pilots head look direction Flying To take off advance throttle slowly plane will trundle along until tail comes off ground will roll along until just tap up elevator will begin steady climb little no additional up Once comfortable altitude throttle back halfway Like its full-size counterpart model requires coordinated rudder elevator aileron make proper turns turns aileron alone tend look pretty sloppy loop just dive bit buildup little extra speed pull back stick Moth will just putt-putt top loop down backside what appears slow motion Loops snap top accomplished giving full rudder elevator just before top ioop releasing about halfway through snap spin gain some altitude pull up sharply speed bleeds off give either full right left rudder full up elevator Moth spins equal facility both left right Slow rolls done building up little speed pulling up feeding aileron some rudder until rate roll established remainder roll accomplished elevator favorite pastimes take Moth flying field just before sun sets wingovers down sun low altitude Just get peak wingover sun glints off silver wing red letters look like spotlighted Landings joy behold Throttle back point engine just ticking over make standard rectangular approach model gets about 18 inches off ground hold level will float what seems like forever wheels finally touch down grass will roll another 10 yards before tail settles down pilots point view Gipsy Moth totally predictable never does anything untoward never does thing unexpected completely controllable attitudes does everything slow stately manner sharp contrast other models Moth maneuvers lowest possible throttle setting adds considerably realism flight Since built Gipsy Moth OS has replaced OS 20 four-stroke 26 Surpass Fortunately fits same engine mounts has same bolt-hole pattern 26 Surpass Gipsy Moth slightly overpowered As result spend some time adjusting throttle until get lowest possible reliable idle Otherwise will never land aircraft have designed built Moth fun fly always taxi back pits big grin fellow MARCS members never fail comment realistically Moth flies much fun watch go through its paces amazed much fun can 20 fourstroke engine half throttle 50-inch biplane Gipsy Moth has hundreds flights just plain fun hope enjoy much have * 40 Model Aviation ory Authorized E-Z UP Corp Dealer 1UXIU IUXID John Peck Leisure Productstg6068735172 131 RAVENWOOD RD AILLES KY 40383
Edition: Model Aviation - 1994/09
Page Numbers: 33, 34, 35, 36, 37, 38, 39, 40
he Moth biplane designed Geoffrey de Havilland 1925 sport aircraft Gipsy Moth created 1928 replacing original Airdisco engine Halforckdesigned 100 hp Gipsy engine Gipsy Moth instant success nd 1162 manufactured manufactured US Moth Aircraft Corporation f America thus earning US-approved type certificate During late 1920s early 1930s amazing long distanc ffights made Gipsy Moths included Amy Johnsons solo flight London and Australia Lady Baileys 18000 mile solo flight around Africa Lt Bentleys solo flight London Capetown South Africa Gipsy Moth recently featured movie Out Africa Unfortunately no Gipsy Moths left US British have purchased returned homeland However fellow California reputed converting Tiger Moths back Gipsy Moths number years ago beautiful all-white Gipsy Moth temporarily housed hangar next between EAA convention Bkkesburg Frank B Baker September 1994 33 AAA fly-in small size rather fragile beauty plane anchored itself back mind did come fore until purchased OS 20 four-stroke engine started thinking about biplanes Gipsy Moth became obvious plane build Arbitrarily selecting 50-inch wingspan enlarged excellent set threeviews appeared Aeromodeller result moderately sized model ideally matched its power plant 9 x 6 prop CONSTRUCTION standards Gipsy Moth particularly light model should take pains keep weight down Use epoxy very sparingly some reason adds weight very insidious manner Choosing weight balsa consistent its use also important Wings Since wings easiest part model will needed build fuselage lets start wing spars consist top bottom x ce balsa sandwiched between Use aliphatic resin glue laminate spars sure secure manner will ensure straight Note balsa spacer does go root rib plywood dihedral brace slips Since wings longer standard 48-inch strip make spars wing panel cut spruce pieces short center section Make wing ribs stacking /16 balsa blanks cutting band saw usually make ribs wing panel time Although plans show false rib between full rib did put just adds weight work Once ribs have cut lay out complete wing building board pin three segments spar place important keep three segments properly aligned problems arise putting dihedral braces remainder wing construction Left The Moth covered silk Finish silver dope sprayed over brushed-on clear dope base Below The Moth flies realistically predictably Turns require coordinated rudder elevator aileron V standard however will need trim ribs Y16 sheet used root end wing panels install sheeting top wing until wing cabane struts have fitted Once wing panels have built laminate 1/ x ce spar caps four dihedral braces trim fit holes wing spars Glue center section spar stubs slide holes wing panel spars block up wings get 12 inches dihedral outer 34 Model Aviafion 4 end rear spar After checking wings equal dihedral no twist let glue dry overnight Once panels have joined use razor saw cut rib 2 plywood dihedral plates cam glued front back spar eight 3A2 balsa center ribs can split lengthwise glued center section top wing top center section sheeted 42 provide sturdy hand hold no center section ribs lower wing spars glue directly fuselage Note ailerons lower wing like use nylon tubing bronze cable y Lobby HLH 805 actuate ailerons Bring nylon tubing forward per plans get large smooth-radius turn tubing makes 900 turn aileron will result smoothly functioning aileron personal preference use continuous length aileron cable Z piece wire soldered center hook onto servo arm install nylon tubing cable until lower wing has glued fuselagethe tubing runs fusleage cable runs through Cut eight outer wing strut supports some 015 aluminum sheet bend per plans drill bolt holes Use some soft copper wire bind strut supports wing spars sure top strut fittings point down bottom fittings point up Put liberal amount Ambroid glue over wire fittings cut slits /16 sheet goes over fittings glue sheets between appropriate ribs sheeting will provide place anchor covering area brackets end result about 5/ inch metal will out open Fuselage Build two fuselage sides directly over plans sure use hardest 3/is square balsa can find top bottom longerons install 3A6 sheet triangles rear cockpit until sides have joined Glue A2 plywood doubler inside fuselage side using epoxy Make plywood firewall cut holes engine mounts drill gas tank holes Lay firewall flat surface use epoxy glue maple engine mount beams Use several metal triangles insure beams 900 firewall no down thrust side thrust Epoxy /i plywood front beam former place Lay two fuselage sides top down flat surface about /2 inch front extending over end pin block straight Glue /6 square top bottom crosspieces F4 eventually goes Glue former B3 /l6 sheet grain crosswise goes B3 /l6 square crosspiece glue tail posts together Set fuselage aside make fuel tank like make own tanks K&S #254 easy solder tin sheet Make pattern doubling half-scale pattern plans cut tin accordingly Solder tank such rear can left open Cut lengths er tubing get auto-supply houses make two vents fuel line Run fuel line bottom center rear tank solder floor tank sure have soldered shut Leave three tubes coming straight out front tank solder both inside outside tank Close up back tank solder shut Use thinner some other solvent remove soldering paste Fill bucket water check tank leaks Once tank leak free drill holes firewall allow three tubes pass through Slip tubes partially through firewall put bit epoxy between tank firewall push tank forward hold until epoxy has set Bend center fuel line upward cut off leave about Y2 inch straight tubing fuel line slide scheme makes lot easier run fuel line carburetor back fourstroke engine Epoxy firewall assembly fuselage sides Again sure no down side thrust Glue / sheet tank support bottom tank top wing cabane struts built next September 1994 35 Basswood tail surface outlines laminated 1/16 strips soaked water wrapped around plywood forms Wing strut sandwiches designed allow addition top wing either before after covering Moths lower wing has 20 incidence top wing set 30 Robart incidence meter used set angles properly Bend / music wire per plans struts will attached fuselage using plywood sandwich has wire middle attach wings 2A sandwich wing spar forms third layer Cut sandwich centers 1/ plywood cut slot fit Vs music wire Cut back sandwich fuselage end wing ends 1/16 plywood Lay three Y16 plywood plates flat surface coat some slow-cure epoxy Lay c wire down fit /i plywood center pieces around put some epoxy sure fill space between wire plywood rear cabane strut lay down top 1/16 plywood plate wire goes across fuselage front cabane strut fuselage sandwich top plate consists former F3 1/8 Lite Ply wing ends cabane struts lay some plastic film over epoxy place weights three sandwiches both struts sure check plates have slid weights placed Remove fuselage building board Make two As plywood rear cabane strut fuselage doublers Glue front cabane strut sandwich F3 making sure 900 top fuselage let glue set Block up fuselage workbench set top longeron fuselage 00 Use some small C-clamps hold 2A sandwiches wing ends front cabane strut front front wing spar Loosely assemble rear cabane sandwich /is doublers Apply some slow curing epoxy glue slip assembly fuselage Again use some small Cclamps hold 2/3 sandwiches tops cabane struts front rear spar Use Robart incidence meter set top wing 300d incidence Slide fuselage end rear cabane strut doublers up down until proper incidence obtained important also measure wingtips workbench surface make sure wing sitting level use some Cclamps hold A6 plywood doublers fuselage sides Leave room until glue has set Although plans show sharp break rear cockpit cut longerons achieve break Simply glue tail posts together let longerons take natural bend may have make F5-F7 bit wider accommodate bend Glue top bottom 3/is square crosspieces vertical fuselage formers F4a-F7 After have glued top fuselage stringers use round file remove balsa between tops stringers better-looking fuselage Rough-cut balsa block fit between firewall former F3 carve shape Note firewall has square top transitions half-round F3 Hollow block glue Bend front cabane support wire make plywood sandwich Use soft copper wire bind top strut front cabane strut glue sandwich fuselage glue has set solder copper wire two struts careful overheat wire 2/3 sandwich could loosened top wing can now removed might well make cockpit hatch cover time simply A2 plywood floor formers 3A2 sheet bent over formers 1/ square spruce stringers add some strength prevent cockpit edges getting beat up due handling Bend two landing gear wires glue plywood sandwiches 36 Model Aviation leted framework ready cover 50-inch span proved idea match OS 20 26 9 x 6 prop Only lower wing has ailerons Author prefers use nylon tubing single length bronze cable Two-inch scale Williams Brothers pilot installed its head positioned would landing Cli I-i Type RO Scale Wingspan 50 inches Engine OS 20-26 Number channels Four Flying weight 68 ounces Construction Built-up Covering/finish Silk dope 1%uuu- PRANK 3AKR LniNrnED4-AS8 WOOD N N N N 1--- LPMINPThfl - SOPASS WOOD 5rNGRS MLJSC NIREN - AILISIC MFE FLY7 7 7 BLSfl BLOCKSMT JMUSC WRE 3 LVLLMSRO5 NN 7 32 1IIE GPSY-k1oTHER SEEs ALL AMThLL5 ALL FOR C OO Pt/ANT Th flv ]L& FurL/RE OF Th ETTz JEtJ 9LLAop oqCyEp CAJE CrOU DiMT FOoL /IE TO INSTANT INM PLSR RI&5TbUE NOT G77AJ ANY OF frW I-ION Ey/ OI Too &u, PEAD M CAt IN YOuR FUTURS WILL 7 TAKE AIASTER CI4ARE TE II TE ~LL IcL-r II NLN WOOD~ N N N jx RLSP k C CD CD CCD 0 0 CA -J Full-Size Plans AvailableSee Page 160 N 0 FU Iw a~i1 01 H~iI_ I~ CUa-U u\0Ia III ~0 2 Lwn 2 aI I b Ill __ 2/l aad tiIa aII 2][b472177704415280]]-~CD ia~ CaIS00 4Q4 U \4tIII18 _K 0II wII II 2 I~ 0 I HHI W LLU a-iTT~a II 8 Model Aviation l some working room lets take care servo installation First fit lower wing fuselage Use razor saw cut slots lower fuselage accept lower wing spars Note rear spar out open trailing edge wing quite bit below bottom fuselage because full-size Gipsy Moth folding wings folded lower wing trailing edge went under fuselage sure adjust slots lower wing has 20 incidence glue wing fuselage should some space between root rib fuselage side allow covering rib fuselage side Measure wingtips ensure lower wing level Use some epoxy glue main landing gear plywood sandwich fuselage forward lower wing spar Use piece 3/33 sheet balsa serve pattern aileron servo platform Trim until will fit between main landing gear plywood sandwich B3 Once fits duplicate /32 plywood glue place Make some 3/33 x ood strips width fuselage glue 1A6 below edge lower longerons front spar B3 serve screw plates servo hatch cover Make servo hatch cover 1Ao plywood sure build some curvature hatch cover hold some small glued-on strips matches lower longeron curvature Mount three servos side-by-side servo mount two -inch strips /i plywood slip 3/s-square maple servo mount rails fuselage slip three servos fuselage Mark screw holes e rails Pull servos rails out screw together Slip whole unit glue rails fuselage side former B3 Adjust position rails until bottoms three servos about /o inch above aileron servo plate sure rails parallel top longerons Now bottom fuselage can finished Clamp plywood sandwich forward 3A2 music wire landing gear back fuselage Measure main landing gear wire allow bend Remove unit bend ends wires Some trial-and-error bending twisting will needed until bends fit front main gear wire Once done epoxy plywood sandwich rear firewall wrap wires copper wire solder front supports main gear wire Solder two strips brass shim stock main landing gear leg glue airfoil-shaped balsa fairings Glue 3Ao sheet cross-grain firewall main landing gear sandwich Tail tail feathers standard construction Note ear post vertical fin goes way bottom fuselage Just looks used old free flight technique make curved outline pieces Cut pieces ood inner shape five empennage parts Soak lengths /16 square basswood water bend around form hold place masking tape Using white glue laminate four layers horizontal plane until outline YI6 thick Let glue dry day remove outlines forms Use small block plane smooth surface result will beautiful outline both strong light seems like too much work just cut outlines Ve6 sheet balsa lower rudder hinge fabricated 010 brass shim stock Wrap brass shim stock around 1A6 music wire solder shim stock together wire Remove wire use file remove appropriate metal result should look just like standard Du-Bro Klett nylon hinge Bend length Ve6 music wire fit 1 tail wheel Run wire through nylon Goldberg tail wheel bracket through brass hinge assembly Make 900 bend rear cut off per plans Use razor saw cut ical slot tail post fuselage Glue stabilizer top longerons forward end fuselage sure check its alignment above front Cut re slot vertical fin post fit rear stabilizer spar Glue vertical w w rAbsolutely Positively Bullet Proof 6OfBB 157H 078w x 161L 77 in/oz 16 sec Also available 605MGmetal gear tlrot 550 cuctoreer Order Supreme receiver wilt receive FREE BeItetPrvvf ret Absolutely Positively Bullet-Proof BUT DONT TAO IT LITERALLY ENIW C ServoB U FTJTABA G U EUTABA Y Apollo Cot Size Inches Wt Slot ROSES Type ec Ii p W c L Terlue 4BV Speed 4 September 1994 39 Hitec RCD Does Once Again new 8 Channel FM Supreme RICa SMALLER IdgIloBeir 7-ch EXs yet have tighter adjacent channel7O5liB METAL BEAR rejection higher 301P rejection20H 011W x 231 & sensitivIty tlntroductory 160 ifl/OZ 27 sec Price $7995 0he New Supreme Series Rzs require 0 hsruess utiliue 8th chsuuel RCD rmation u dealer nearest tall 619 2584940 0729 Put~tnds Ave Suite c CA 92071 SPORT PACK55414058p1617542uz019 Sec PRO-PACK15414 u0801617543 uz000 Sec ELECTRO-GUDE20312 u051309304 az000 Sec GIANT PACK15300011u233601335z002 Sec wII aid servo 10 55 1 14 08 16 170 43 uz 020 Sec SUS-MICK 0431105 tO 062 31 sz 5 4 fin onto stabilizer fuselage rear vertical fin post should flush end fuselage Drill 3A2 hole through vertical fin post centerline stabilizer flush rear stabilizer spar Feed /32 music wire connects two elevator halves through hole Install elevator hinges making sure line up same time glue connector wire holes elevators Install lower rudder hinge tail wheel assembly upper rudder hinge Make two pushrods hard re balsa 3A6 birch dowel install threaded rod Kwik-Links control surface ends will have put Z bends exit fuselage Attach Kwik-Links control surfaces fit front threaded rods Kwik-Links servos wrap threaded rod thread apply generous coating AmbroidWhile pushrods still place install 3A2 sheet goes both fuselage sides below stabilizer pushrods cannot removed fuselage unless make very large exit holes just leave Install engine decide way engine servo should mounted Drill hole firewall install nylon tubing Solder threaded connectors end cable Hook up throttle end feed cable servo cut appropriate length allowing threaded connector Kwik-Link necessary support nylon tubing couple points ensure functions properly Glue hollowed-out balsa block between firewall former F3 well balsa blocks around engine Leave enough room around engine have easy access engine mounting bolts free motion throttle arm its Kwik-Link point must decide whether mount top wing before after its covered designed 2/3 wing strut sandwiches top wing could covered painted before mounted lot room between wings using iron-on-covering wing can covered struts covered separately will need cut holes sheeting glue sandwiches spars recover holes Once wing mounted make four outer wing struts /I6 x wood Make eight aluminum plates drill lot 1A6 holes Use coping saw cut slot end struts accept plates Smear epoxy plates slots slip plates slots careful get epoxy exterior wood Use some burnt umber staln color struts give coat clear dope Slip strut top metal fitting leaving about /&i clearance between wing mark bolt position drill 3A2 hole through fitting strut Install 2-56 bolt nut lower end strut should fit nicely metal fitting top lower wing again leaving about 3/M clearance strut should put pressure wings Once fits drill 32 hole install 2-56 bolt procedure should repeated outer struts Covering On trip Japan asked wife stop hobby shop buy several yards silk went number hobby shops carried desperation bought some lightweight silk used make doll dresses used cover fuselage tail feathers put wet after dry brushed several coats clear dope sprayed silver initially appeared reasonably tight after short time crackup became loose baggy decided recover parts give model well worn look Im sure Moths must have appeared way after years hard service wings covered regular model silk have stayed smooth made engine cowl photographic purposes dont use flying put two-inch-scale Williams Brothers pilot rear cockpit Since biplane pilots look forward over side landing glue pilots head look direction Flying To take off advance throttle slowly plane will trundle along until tail comes off ground will roll along until just tap up elevator will begin steady climb little no additional up Once comfortable altitude throttle back halfway Like its full-size counterpart model requires coordinated rudder elevator aileron make proper turns turns aileron alone tend look pretty sloppy loop just dive bit buildup little extra speed pull back stick Moth will just putt-putt top loop down backside what appears slow motion Loops snap top accomplished giving full rudder elevator just before top ioop releasing about halfway through snap spin gain some altitude pull up sharply speed bleeds off give either full right left rudder full up elevator Moth spins equal facility both left right Slow rolls done building up little speed pulling up feeding aileron some rudder until rate roll established remainder roll accomplished elevator favorite pastimes take Moth flying field just before sun sets wingovers down sun low altitude Just get peak wingover sun glints off silver wing red letters look like spotlighted Landings joy behold Throttle back point engine just ticking over make standard rectangular approach model gets about 18 inches off ground hold level will float what seems like forever wheels finally touch down grass will roll another 10 yards before tail settles down pilots point view Gipsy Moth totally predictable never does anything untoward never does thing unexpected completely controllable attitudes does everything slow stately manner sharp contrast other models Moth maneuvers lowest possible throttle setting adds considerably realism flight Since built Gipsy Moth OS has replaced OS 20 four-stroke 26 Surpass Fortunately fits same engine mounts has same bolt-hole pattern 26 Surpass Gipsy Moth slightly overpowered As result spend some time adjusting throttle until get lowest possible reliable idle Otherwise will never land aircraft have designed built Moth fun fly always taxi back pits big grin fellow MARCS members never fail comment realistically Moth flies much fun watch go through its paces amazed much fun can 20 fourstroke engine half throttle 50-inch biplane Gipsy Moth has hundreds flights just plain fun hope enjoy much have * 40 Model Aviation ory Authorized E-Z UP Corp Dealer 1UXIU IUXID John Peck Leisure Productstg6068735172 131 RAVENWOOD RD AILLES KY 40383
Edition: Model Aviation - 1994/09
Page Numbers: 33, 34, 35, 36, 37, 38, 39, 40
he Moth biplane designed Geoffrey de Havilland 1925 sport aircraft Gipsy Moth created 1928 replacing original Airdisco engine Halforckdesigned 100 hp Gipsy engine Gipsy Moth instant success nd 1162 manufactured manufactured US Moth Aircraft Corporation f America thus earning US-approved type certificate During late 1920s early 1930s amazing long distanc ffights made Gipsy Moths included Amy Johnsons solo flight London and Australia Lady Baileys 18000 mile solo flight around Africa Lt Bentleys solo flight London Capetown South Africa Gipsy Moth recently featured movie Out Africa Unfortunately no Gipsy Moths left US British have purchased returned homeland However fellow California reputed converting Tiger Moths back Gipsy Moths number years ago beautiful all-white Gipsy Moth temporarily housed hangar next between EAA convention Bkkesburg Frank B Baker September 1994 33 AAA fly-in small size rather fragile beauty plane anchored itself back mind did come fore until purchased OS 20 four-stroke engine started thinking about biplanes Gipsy Moth became obvious plane build Arbitrarily selecting 50-inch wingspan enlarged excellent set threeviews appeared Aeromodeller result moderately sized model ideally matched its power plant 9 x 6 prop CONSTRUCTION standards Gipsy Moth particularly light model should take pains keep weight down Use epoxy very sparingly some reason adds weight very insidious manner Choosing weight balsa consistent its use also important Wings Since wings easiest part model will needed build fuselage lets start wing spars consist top bottom x ce balsa sandwiched between Use aliphatic resin glue laminate spars sure secure manner will ensure straight Note balsa spacer does go root rib plywood dihedral brace slips Since wings longer standard 48-inch strip make spars wing panel cut spruce pieces short center section Make wing ribs stacking /16 balsa blanks cutting band saw usually make ribs wing panel time Although plans show false rib between full rib did put just adds weight work Once ribs have cut lay out complete wing building board pin three segments spar place important keep three segments properly aligned problems arise putting dihedral braces remainder wing construction Left The Moth covered silk Finish silver dope sprayed over brushed-on clear dope base Below The Moth flies realistically predictably Turns require coordinated rudder elevator aileron V standard however will need trim ribs Y16 sheet used root end wing panels install sheeting top wing until wing cabane struts have fitted Once wing panels have built laminate 1/ x ce spar caps four dihedral braces trim fit holes wing spars Glue center section spar stubs slide holes wing panel spars block up wings get 12 inches dihedral outer 34 Model Aviafion 4 end rear spar After checking wings equal dihedral no twist let glue dry overnight Once panels have joined use razor saw cut rib 2 plywood dihedral plates cam glued front back spar eight 3A2 balsa center ribs can split lengthwise glued center section top wing top center section sheeted 42 provide sturdy hand hold no center section ribs lower wing spars glue directly fuselage Note ailerons lower wing like use nylon tubing bronze cable y Lobby HLH 805 actuate ailerons Bring nylon tubing forward per plans get large smooth-radius turn tubing makes 900 turn aileron will result smoothly functioning aileron personal preference use continuous length aileron cable Z piece wire soldered center hook onto servo arm install nylon tubing cable until lower wing has glued fuselagethe tubing runs fusleage cable runs through Cut eight outer wing strut supports some 015 aluminum sheet bend per plans drill bolt holes Use some soft copper wire bind strut supports wing spars sure top strut fittings point down bottom fittings point up Put liberal amount Ambroid glue over wire fittings cut slits /16 sheet goes over fittings glue sheets between appropriate ribs sheeting will provide place anchor covering area brackets end result about 5/ inch metal will out open Fuselage Build two fuselage sides directly over plans sure use hardest 3/is square balsa can find top bottom longerons install 3A6 sheet triangles rear cockpit until sides have joined Glue A2 plywood doubler inside fuselage side using epoxy Make plywood firewall cut holes engine mounts drill gas tank holes Lay firewall flat surface use epoxy glue maple engine mount beams Use several metal triangles insure beams 900 firewall no down thrust side thrust Epoxy /i plywood front beam former place Lay two fuselage sides top down flat surface about /2 inch front extending over end pin block straight Glue /6 square top bottom crosspieces F4 eventually goes Glue former B3 /l6 sheet grain crosswise goes B3 /l6 square crosspiece glue tail posts together Set fuselage aside make fuel tank like make own tanks K&S #254 easy solder tin sheet Make pattern doubling half-scale pattern plans cut tin accordingly Solder tank such rear can left open Cut lengths er tubing get auto-supply houses make two vents fuel line Run fuel line bottom center rear tank solder floor tank sure have soldered shut Leave three tubes coming straight out front tank solder both inside outside tank Close up back tank solder shut Use thinner some other solvent remove soldering paste Fill bucket water check tank leaks Once tank leak free drill holes firewall allow three tubes pass through Slip tubes partially through firewall put bit epoxy between tank firewall push tank forward hold until epoxy has set Bend center fuel line upward cut off leave about Y2 inch straight tubing fuel line slide scheme makes lot easier run fuel line carburetor back fourstroke engine Epoxy firewall assembly fuselage sides Again sure no down side thrust Glue / sheet tank support bottom tank top wing cabane struts built next September 1994 35 Basswood tail surface outlines laminated 1/16 strips soaked water wrapped around plywood forms Wing strut sandwiches designed allow addition top wing either before after covering Moths lower wing has 20 incidence top wing set 30 Robart incidence meter used set angles properly Bend / music wire per plans struts will attached fuselage using plywood sandwich has wire middle attach wings 2A sandwich wing spar forms third layer Cut sandwich centers 1/ plywood cut slot fit Vs music wire Cut back sandwich fuselage end wing ends 1/16 plywood Lay three Y16 plywood plates flat surface coat some slow-cure epoxy Lay c wire down fit /i plywood center pieces around put some epoxy sure fill space between wire plywood rear cabane strut lay down top 1/16 plywood plate wire goes across fuselage front cabane strut fuselage sandwich top plate consists former F3 1/8 Lite Ply wing ends cabane struts lay some plastic film over epoxy place weights three sandwiches both struts sure check plates have slid weights placed Remove fuselage building board Make two As plywood rear cabane strut fuselage doublers Glue front cabane strut sandwich F3 making sure 900 top fuselage let glue set Block up fuselage workbench set top longeron fuselage 00 Use some small C-clamps hold 2A sandwiches wing ends front cabane strut front front wing spar Loosely assemble rear cabane sandwich /is doublers Apply some slow curing epoxy glue slip assembly fuselage Again use some small Cclamps hold 2/3 sandwiches tops cabane struts front rear spar Use Robart incidence meter set top wing 300d incidence Slide fuselage end rear cabane strut doublers up down until proper incidence obtained important also measure wingtips workbench surface make sure wing sitting level use some Cclamps hold A6 plywood doublers fuselage sides Leave room until glue has set Although plans show sharp break rear cockpit cut longerons achieve break Simply glue tail posts together let longerons take natural bend may have make F5-F7 bit wider accommodate bend Glue top bottom 3/is square crosspieces vertical fuselage formers F4a-F7 After have glued top fuselage stringers use round file remove balsa between tops stringers better-looking fuselage Rough-cut balsa block fit between firewall former F3 carve shape Note firewall has square top transitions half-round F3 Hollow block glue Bend front cabane support wire make plywood sandwich Use soft copper wire bind top strut front cabane strut glue sandwich fuselage glue has set solder copper wire two struts careful overheat wire 2/3 sandwich could loosened top wing can now removed might well make cockpit hatch cover time simply A2 plywood floor formers 3A2 sheet bent over formers 1/ square spruce stringers add some strength prevent cockpit edges getting beat up due handling Bend two landing gear wires glue plywood sandwiches 36 Model Aviation leted framework ready cover 50-inch span proved idea match OS 20 26 9 x 6 prop Only lower wing has ailerons Author prefers use nylon tubing single length bronze cable Two-inch scale Williams Brothers pilot installed its head positioned would landing Cli I-i Type RO Scale Wingspan 50 inches Engine OS 20-26 Number channels Four Flying weight 68 ounces Construction Built-up Covering/finish Silk dope 1%uuu- PRANK 3AKR LniNrnED4-AS8 WOOD N N N N 1--- LPMINPThfl - SOPASS WOOD 5rNGRS MLJSC NIREN - AILISIC MFE FLY7 7 7 BLSfl BLOCKSMT JMUSC WRE 3 LVLLMSRO5 NN 7 32 1IIE GPSY-k1oTHER SEEs ALL AMThLL5 ALL FOR C OO Pt/ANT Th flv ]L& FurL/RE OF Th ETTz JEtJ 9LLAop oqCyEp CAJE CrOU DiMT FOoL /IE TO INSTANT INM PLSR RI&5TbUE NOT G77AJ ANY OF frW I-ION Ey/ OI Too &u, PEAD M CAt IN YOuR FUTURS WILL 7 TAKE AIASTER CI4ARE TE II TE ~LL IcL-r II NLN WOOD~ N N N jx RLSP k C CD CD CCD 0 0 CA -J Full-Size Plans AvailableSee Page 160 N 0 FU Iw a~i1 01 H~iI_ I~ CUa-U u\0Ia III ~0 2 Lwn 2 aI I b Ill __ 2/l aad tiIa aII 2][b472177704415280]]-~CD ia~ CaIS00 4Q4 U \4tIII18 _K 0II wII II 2 I~ 0 I HHI W LLU a-iTT~a II 8 Model Aviation l some working room lets take care servo installation First fit lower wing fuselage Use razor saw cut slots lower fuselage accept lower wing spars Note rear spar out open trailing edge wing quite bit below bottom fuselage because full-size Gipsy Moth folding wings folded lower wing trailing edge went under fuselage sure adjust slots lower wing has 20 incidence glue wing fuselage should some space between root rib fuselage side allow covering rib fuselage side Measure wingtips ensure lower wing level Use some epoxy glue main landing gear plywood sandwich fuselage forward lower wing spar Use piece 3/33 sheet balsa serve pattern aileron servo platform Trim until will fit between main landing gear plywood sandwich B3 Once fits duplicate /32 plywood glue place Make some 3/33 x ood strips width fuselage glue 1A6 below edge lower longerons front spar B3 serve screw plates servo hatch cover Make servo hatch cover 1Ao plywood sure build some curvature hatch cover hold some small glued-on strips matches lower longeron curvature Mount three servos side-by-side servo mount two -inch strips /i plywood slip 3/s-square maple servo mount rails fuselage slip three servos fuselage Mark screw holes e rails Pull servos rails out screw together Slip whole unit glue rails fuselage side former B3 Adjust position rails until bottoms three servos about /o inch above aileron servo plate sure rails parallel top longerons Now bottom fuselage can finished Clamp plywood sandwich forward 3A2 music wire landing gear back fuselage Measure main landing gear wire allow bend Remove unit bend ends wires Some trial-and-error bending twisting will needed until bends fit front main gear wire Once done epoxy plywood sandwich rear firewall wrap wires copper wire solder front supports main gear wire Solder two strips brass shim stock main landing gear leg glue airfoil-shaped balsa fairings Glue 3Ao sheet cross-grain firewall main landing gear sandwich Tail tail feathers standard construction Note ear post vertical fin goes way bottom fuselage Just looks used old free flight technique make curved outline pieces Cut pieces ood inner shape five empennage parts Soak lengths /16 square basswood water bend around form hold place masking tape Using white glue laminate four layers horizontal plane until outline YI6 thick Let glue dry day remove outlines forms Use small block plane smooth surface result will beautiful outline both strong light seems like too much work just cut outlines Ve6 sheet balsa lower rudder hinge fabricated 010 brass shim stock Wrap brass shim stock around 1A6 music wire solder shim stock together wire Remove wire use file remove appropriate metal result should look just like standard Du-Bro Klett nylon hinge Bend length Ve6 music wire fit 1 tail wheel Run wire through nylon Goldberg tail wheel bracket through brass hinge assembly Make 900 bend rear cut off per plans Use razor saw cut ical slot tail post fuselage Glue stabilizer top longerons forward end fuselage sure check its alignment above front Cut re slot vertical fin post fit rear stabilizer spar Glue vertical w w rAbsolutely Positively Bullet Proof 6OfBB 157H 078w x 161L 77 in/oz 16 sec Also available 605MGmetal gear tlrot 550 cuctoreer Order Supreme receiver wilt receive FREE BeItetPrvvf ret Absolutely Positively Bullet-Proof BUT DONT TAO IT LITERALLY ENIW C ServoB U FTJTABA G U EUTABA Y Apollo Cot Size Inches Wt Slot ROSES Type ec Ii p W c L Terlue 4BV Speed 4 September 1994 39 Hitec RCD Does Once Again new 8 Channel FM Supreme RICa SMALLER IdgIloBeir 7-ch EXs yet have tighter adjacent channel7O5liB METAL BEAR rejection higher 301P rejection20H 011W x 231 & sensitivIty tlntroductory 160 ifl/OZ 27 sec Price $7995 0he New Supreme Series Rzs require 0 hsruess utiliue 8th chsuuel RCD rmation u dealer nearest tall 619 2584940 0729 Put~tnds Ave Suite c CA 92071 SPORT PACK55414058p1617542uz019 Sec PRO-PACK15414 u0801617543 uz000 Sec ELECTRO-GUDE20312 u051309304 az000 Sec GIANT PACK15300011u233601335z002 Sec wII aid servo 10 55 1 14 08 16 170 43 uz 020 Sec SUS-MICK 0431105 tO 062 31 sz 5 4 fin onto stabilizer fuselage rear vertical fin post should flush end fuselage Drill 3A2 hole through vertical fin post centerline stabilizer flush rear stabilizer spar Feed /32 music wire connects two elevator halves through hole Install elevator hinges making sure line up same time glue connector wire holes elevators Install lower rudder hinge tail wheel assembly upper rudder hinge Make two pushrods hard re balsa 3A6 birch dowel install threaded rod Kwik-Links control surface ends will have put Z bends exit fuselage Attach Kwik-Links control surfaces fit front threaded rods Kwik-Links servos wrap threaded rod thread apply generous coating AmbroidWhile pushrods still place install 3A2 sheet goes both fuselage sides below stabilizer pushrods cannot removed fuselage unless make very large exit holes just leave Install engine decide way engine servo should mounted Drill hole firewall install nylon tubing Solder threaded connectors end cable Hook up throttle end feed cable servo cut appropriate length allowing threaded connector Kwik-Link necessary support nylon tubing couple points ensure functions properly Glue hollowed-out balsa block between firewall former F3 well balsa blocks around engine Leave enough room around engine have easy access engine mounting bolts free motion throttle arm its Kwik-Link point must decide whether mount top wing before after its covered designed 2/3 wing strut sandwiches top wing could covered painted before mounted lot room between wings using iron-on-covering wing can covered struts covered separately will need cut holes sheeting glue sandwiches spars recover holes Once wing mounted make four outer wing struts /I6 x wood Make eight aluminum plates drill lot 1A6 holes Use coping saw cut slot end struts accept plates Smear epoxy plates slots slip plates slots careful get epoxy exterior wood Use some burnt umber staln color struts give coat clear dope Slip strut top metal fitting leaving about /&i clearance between wing mark bolt position drill 3A2 hole through fitting strut Install 2-56 bolt nut lower end strut should fit nicely metal fitting top lower wing again leaving about 3/M clearance strut should put pressure wings Once fits drill 32 hole install 2-56 bolt procedure should repeated outer struts Covering On trip Japan asked wife stop hobby shop buy several yards silk went number hobby shops carried desperation bought some lightweight silk used make doll dresses used cover fuselage tail feathers put wet after dry brushed several coats clear dope sprayed silver initially appeared reasonably tight after short time crackup became loose baggy decided recover parts give model well worn look Im sure Moths must have appeared way after years hard service wings covered regular model silk have stayed smooth made engine cowl photographic purposes dont use flying put two-inch-scale Williams Brothers pilot rear cockpit Since biplane pilots look forward over side landing glue pilots head look direction Flying To take off advance throttle slowly plane will trundle along until tail comes off ground will roll along until just tap up elevator will begin steady climb little no additional up Once comfortable altitude throttle back halfway Like its full-size counterpart model requires coordinated rudder elevator aileron make proper turns turns aileron alone tend look pretty sloppy loop just dive bit buildup little extra speed pull back stick Moth will just putt-putt top loop down backside what appears slow motion Loops snap top accomplished giving full rudder elevator just before top ioop releasing about halfway through snap spin gain some altitude pull up sharply speed bleeds off give either full right left rudder full up elevator Moth spins equal facility both left right Slow rolls done building up little speed pulling up feeding aileron some rudder until rate roll established remainder roll accomplished elevator favorite pastimes take Moth flying field just before sun sets wingovers down sun low altitude Just get peak wingover sun glints off silver wing red letters look like spotlighted Landings joy behold Throttle back point engine just ticking over make standard rectangular approach model gets about 18 inches off ground hold level will float what seems like forever wheels finally touch down grass will roll another 10 yards before tail settles down pilots point view Gipsy Moth totally predictable never does anything untoward never does thing unexpected completely controllable attitudes does everything slow stately manner sharp contrast other models Moth maneuvers lowest possible throttle setting adds considerably realism flight Since built Gipsy Moth OS has replaced OS 20 four-stroke 26 Surpass Fortunately fits same engine mounts has same bolt-hole pattern 26 Surpass Gipsy Moth slightly overpowered As result spend some time adjusting throttle until get lowest possible reliable idle Otherwise will never land aircraft have designed built Moth fun fly always taxi back pits big grin fellow MARCS members never fail comment realistically Moth flies much fun watch go through its paces amazed much fun can 20 fourstroke engine half throttle 50-inch biplane Gipsy Moth has hundreds flights just plain fun hope enjoy much have * 40 Model Aviation ory Authorized E-Z UP Corp Dealer 1UXIU IUXID John Peck Leisure Productstg6068735172 131 RAVENWOOD RD AILLES KY 40383
Edition: Model Aviation - 1994/09
Page Numbers: 33, 34, 35, 36, 37, 38, 39, 40
he Moth biplane designed Geoffrey de Havilland 1925 sport aircraft Gipsy Moth created 1928 replacing original Airdisco engine Halforckdesigned 100 hp Gipsy engine Gipsy Moth instant success nd 1162 manufactured manufactured US Moth Aircraft Corporation f America thus earning US-approved type certificate During late 1920s early 1930s amazing long distanc ffights made Gipsy Moths included Amy Johnsons solo flight London and Australia Lady Baileys 18000 mile solo flight around Africa Lt Bentleys solo flight London Capetown South Africa Gipsy Moth recently featured movie Out Africa Unfortunately no Gipsy Moths left US British have purchased returned homeland However fellow California reputed converting Tiger Moths back Gipsy Moths number years ago beautiful all-white Gipsy Moth temporarily housed hangar next between EAA convention Bkkesburg Frank B Baker September 1994 33 AAA fly-in small size rather fragile beauty plane anchored itself back mind did come fore until purchased OS 20 four-stroke engine started thinking about biplanes Gipsy Moth became obvious plane build Arbitrarily selecting 50-inch wingspan enlarged excellent set threeviews appeared Aeromodeller result moderately sized model ideally matched its power plant 9 x 6 prop CONSTRUCTION standards Gipsy Moth particularly light model should take pains keep weight down Use epoxy very sparingly some reason adds weight very insidious manner Choosing weight balsa consistent its use also important Wings Since wings easiest part model will needed build fuselage lets start wing spars consist top bottom x ce balsa sandwiched between Use aliphatic resin glue laminate spars sure secure manner will ensure straight Note balsa spacer does go root rib plywood dihedral brace slips Since wings longer standard 48-inch strip make spars wing panel cut spruce pieces short center section Make wing ribs stacking /16 balsa blanks cutting band saw usually make ribs wing panel time Although plans show false rib between full rib did put just adds weight work Once ribs have cut lay out complete wing building board pin three segments spar place important keep three segments properly aligned problems arise putting dihedral braces remainder wing construction Left The Moth covered silk Finish silver dope sprayed over brushed-on clear dope base Below The Moth flies realistically predictably Turns require coordinated rudder elevator aileron V standard however will need trim ribs Y16 sheet used root end wing panels install sheeting top wing until wing cabane struts have fitted Once wing panels have built laminate 1/ x ce spar caps four dihedral braces trim fit holes wing spars Glue center section spar stubs slide holes wing panel spars block up wings get 12 inches dihedral outer 34 Model Aviafion 4 end rear spar After checking wings equal dihedral no twist let glue dry overnight Once panels have joined use razor saw cut rib 2 plywood dihedral plates cam glued front back spar eight 3A2 balsa center ribs can split lengthwise glued center section top wing top center section sheeted 42 provide sturdy hand hold no center section ribs lower wing spars glue directly fuselage Note ailerons lower wing like use nylon tubing bronze cable y Lobby HLH 805 actuate ailerons Bring nylon tubing forward per plans get large smooth-radius turn tubing makes 900 turn aileron will result smoothly functioning aileron personal preference use continuous length aileron cable Z piece wire soldered center hook onto servo arm install nylon tubing cable until lower wing has glued fuselagethe tubing runs fusleage cable runs through Cut eight outer wing strut supports some 015 aluminum sheet bend per plans drill bolt holes Use some soft copper wire bind strut supports wing spars sure top strut fittings point down bottom fittings point up Put liberal amount Ambroid glue over wire fittings cut slits /16 sheet goes over fittings glue sheets between appropriate ribs sheeting will provide place anchor covering area brackets end result about 5/ inch metal will out open Fuselage Build two fuselage sides directly over plans sure use hardest 3/is square balsa can find top bottom longerons install 3A6 sheet triangles rear cockpit until sides have joined Glue A2 plywood doubler inside fuselage side using epoxy Make plywood firewall cut holes engine mounts drill gas tank holes Lay firewall flat surface use epoxy glue maple engine mount beams Use several metal triangles insure beams 900 firewall no down thrust side thrust Epoxy /i plywood front beam former place Lay two fuselage sides top down flat surface about /2 inch front extending over end pin block straight Glue /6 square top bottom crosspieces F4 eventually goes Glue former B3 /l6 sheet grain crosswise goes B3 /l6 square crosspiece glue tail posts together Set fuselage aside make fuel tank like make own tanks K&S #254 easy solder tin sheet Make pattern doubling half-scale pattern plans cut tin accordingly Solder tank such rear can left open Cut lengths er tubing get auto-supply houses make two vents fuel line Run fuel line bottom center rear tank solder floor tank sure have soldered shut Leave three tubes coming straight out front tank solder both inside outside tank Close up back tank solder shut Use thinner some other solvent remove soldering paste Fill bucket water check tank leaks Once tank leak free drill holes firewall allow three tubes pass through Slip tubes partially through firewall put bit epoxy between tank firewall push tank forward hold until epoxy has set Bend center fuel line upward cut off leave about Y2 inch straight tubing fuel line slide scheme makes lot easier run fuel line carburetor back fourstroke engine Epoxy firewall assembly fuselage sides Again sure no down side thrust Glue / sheet tank support bottom tank top wing cabane struts built next September 1994 35 Basswood tail surface outlines laminated 1/16 strips soaked water wrapped around plywood forms Wing strut sandwiches designed allow addition top wing either before after covering Moths lower wing has 20 incidence top wing set 30 Robart incidence meter used set angles properly Bend / music wire per plans struts will attached fuselage using plywood sandwich has wire middle attach wings 2A sandwich wing spar forms third layer Cut sandwich centers 1/ plywood cut slot fit Vs music wire Cut back sandwich fuselage end wing ends 1/16 plywood Lay three Y16 plywood plates flat surface coat some slow-cure epoxy Lay c wire down fit /i plywood center pieces around put some epoxy sure fill space between wire plywood rear cabane strut lay down top 1/16 plywood plate wire goes across fuselage front cabane strut fuselage sandwich top plate consists former F3 1/8 Lite Ply wing ends cabane struts lay some plastic film over epoxy place weights three sandwiches both struts sure check plates have slid weights placed Remove fuselage building board Make two As plywood rear cabane strut fuselage doublers Glue front cabane strut sandwich F3 making sure 900 top fuselage let glue set Block up fuselage workbench set top longeron fuselage 00 Use some small C-clamps hold 2A sandwiches wing ends front cabane strut front front wing spar Loosely assemble rear cabane sandwich /is doublers Apply some slow curing epoxy glue slip assembly fuselage Again use some small Cclamps hold 2/3 sandwiches tops cabane struts front rear spar Use Robart incidence meter set top wing 300d incidence Slide fuselage end rear cabane strut doublers up down until proper incidence obtained important also measure wingtips workbench surface make sure wing sitting level use some Cclamps hold A6 plywood doublers fuselage sides Leave room until glue has set Although plans show sharp break rear cockpit cut longerons achieve break Simply glue tail posts together let longerons take natural bend may have make F5-F7 bit wider accommodate bend Glue top bottom 3/is square crosspieces vertical fuselage formers F4a-F7 After have glued top fuselage stringers use round file remove balsa between tops stringers better-looking fuselage Rough-cut balsa block fit between firewall former F3 carve shape Note firewall has square top transitions half-round F3 Hollow block glue Bend front cabane support wire make plywood sandwich Use soft copper wire bind top strut front cabane strut glue sandwich fuselage glue has set solder copper wire two struts careful overheat wire 2/3 sandwich could loosened top wing can now removed might well make cockpit hatch cover time simply A2 plywood floor formers 3A2 sheet bent over formers 1/ square spruce stringers add some strength prevent cockpit edges getting beat up due handling Bend two landing gear wires glue plywood sandwiches 36 Model Aviation leted framework ready cover 50-inch span proved idea match OS 20 26 9 x 6 prop Only lower wing has ailerons Author prefers use nylon tubing single length bronze cable Two-inch scale Williams Brothers pilot installed its head positioned would landing Cli I-i Type RO Scale Wingspan 50 inches Engine OS 20-26 Number channels Four Flying weight 68 ounces Construction Built-up Covering/finish Silk dope 1%uuu- PRANK 3AKR LniNrnED4-AS8 WOOD N N N N 1--- LPMINPThfl - SOPASS WOOD 5rNGRS MLJSC NIREN - AILISIC MFE FLY7 7 7 BLSfl BLOCKSMT JMUSC WRE 3 LVLLMSRO5 NN 7 32 1IIE GPSY-k1oTHER SEEs ALL AMThLL5 ALL FOR C OO Pt/ANT Th flv ]L& FurL/RE OF Th ETTz JEtJ 9LLAop oqCyEp CAJE CrOU DiMT FOoL /IE TO INSTANT INM PLSR RI&5TbUE NOT G77AJ ANY OF frW I-ION Ey/ OI Too &u, PEAD M CAt IN YOuR FUTURS WILL 7 TAKE AIASTER CI4ARE TE II TE ~LL IcL-r II NLN WOOD~ N N N jx RLSP k C CD CD CCD 0 0 CA -J Full-Size Plans AvailableSee Page 160 N 0 FU Iw a~i1 01 H~iI_ I~ CUa-U u\0Ia III ~0 2 Lwn 2 aI I b Ill __ 2/l aad tiIa aII 2][b472177704415280]]-~CD ia~ CaIS00 4Q4 U \4tIII18 _K 0II wII II 2 I~ 0 I HHI W LLU a-iTT~a II 8 Model Aviation l some working room lets take care servo installation First fit lower wing fuselage Use razor saw cut slots lower fuselage accept lower wing spars Note rear spar out open trailing edge wing quite bit below bottom fuselage because full-size Gipsy Moth folding wings folded lower wing trailing edge went under fuselage sure adjust slots lower wing has 20 incidence glue wing fuselage should some space between root rib fuselage side allow covering rib fuselage side Measure wingtips ensure lower wing level Use some epoxy glue main landing gear plywood sandwich fuselage forward lower wing spar Use piece 3/33 sheet balsa serve pattern aileron servo platform Trim until will fit between main landing gear plywood sandwich B3 Once fits duplicate /32 plywood glue place Make some 3/33 x ood strips width fuselage glue 1A6 below edge lower longerons front spar B3 serve screw plates servo hatch cover Make servo hatch cover 1Ao plywood sure build some curvature hatch cover hold some small glued-on strips matches lower longeron curvature Mount three servos side-by-side servo mount two -inch strips /i plywood slip 3/s-square maple servo mount rails fuselage slip three servos fuselage Mark screw holes e rails Pull servos rails out screw together Slip whole unit glue rails fuselage side former B3 Adjust position rails until bottoms three servos about /o inch above aileron servo plate sure rails parallel top longerons Now bottom fuselage can finished Clamp plywood sandwich forward 3A2 music wire landing gear back fuselage Measure main landing gear wire allow bend Remove unit bend ends wires Some trial-and-error bending twisting will needed until bends fit front main gear wire Once done epoxy plywood sandwich rear firewall wrap wires copper wire solder front supports main gear wire Solder two strips brass shim stock main landing gear leg glue airfoil-shaped balsa fairings Glue 3Ao sheet cross-grain firewall main landing gear sandwich Tail tail feathers standard construction Note ear post vertical fin goes way bottom fuselage Just looks used old free flight technique make curved outline pieces Cut pieces ood inner shape five empennage parts Soak lengths /16 square basswood water bend around form hold place masking tape Using white glue laminate four layers horizontal plane until outline YI6 thick Let glue dry day remove outlines forms Use small block plane smooth surface result will beautiful outline both strong light seems like too much work just cut outlines Ve6 sheet balsa lower rudder hinge fabricated 010 brass shim stock Wrap brass shim stock around 1A6 music wire solder shim stock together wire Remove wire use file remove appropriate metal result should look just like standard Du-Bro Klett nylon hinge Bend length Ve6 music wire fit 1 tail wheel Run wire through nylon Goldberg tail wheel bracket through brass hinge assembly Make 900 bend rear cut off per plans Use razor saw cut ical slot tail post fuselage Glue stabilizer top longerons forward end fuselage sure check its alignment above front Cut re slot vertical fin post fit rear stabilizer spar Glue vertical w w rAbsolutely Positively Bullet Proof 6OfBB 157H 078w x 161L 77 in/oz 16 sec Also available 605MGmetal gear tlrot 550 cuctoreer Order Supreme receiver wilt receive FREE BeItetPrvvf ret Absolutely Positively Bullet-Proof BUT DONT TAO IT LITERALLY ENIW C ServoB U FTJTABA G U EUTABA Y Apollo Cot Size Inches Wt Slot ROSES Type ec Ii p W c L Terlue 4BV Speed 4 September 1994 39 Hitec RCD Does Once Again new 8 Channel FM Supreme RICa SMALLER IdgIloBeir 7-ch EXs yet have tighter adjacent channel7O5liB METAL BEAR rejection higher 301P rejection20H 011W x 231 & sensitivIty tlntroductory 160 ifl/OZ 27 sec Price $7995 0he New Supreme Series Rzs require 0 hsruess utiliue 8th chsuuel RCD rmation u dealer nearest tall 619 2584940 0729 Put~tnds Ave Suite c CA 92071 SPORT PACK55414058p1617542uz019 Sec PRO-PACK15414 u0801617543 uz000 Sec ELECTRO-GUDE20312 u051309304 az000 Sec GIANT PACK15300011u233601335z002 Sec wII aid servo 10 55 1 14 08 16 170 43 uz 020 Sec SUS-MICK 0431105 tO 062 31 sz 5 4 fin onto stabilizer fuselage rear vertical fin post should flush end fuselage Drill 3A2 hole through vertical fin post centerline stabilizer flush rear stabilizer spar Feed /32 music wire connects two elevator halves through hole Install elevator hinges making sure line up same time glue connector wire holes elevators Install lower rudder hinge tail wheel assembly upper rudder hinge Make two pushrods hard re balsa 3A6 birch dowel install threaded rod Kwik-Links control surface ends will have put Z bends exit fuselage Attach Kwik-Links control surfaces fit front threaded rods Kwik-Links servos wrap threaded rod thread apply generous coating AmbroidWhile pushrods still place install 3A2 sheet goes both fuselage sides below stabilizer pushrods cannot removed fuselage unless make very large exit holes just leave Install engine decide way engine servo should mounted Drill hole firewall install nylon tubing Solder threaded connectors end cable Hook up throttle end feed cable servo cut appropriate length allowing threaded connector Kwik-Link necessary support nylon tubing couple points ensure functions properly Glue hollowed-out balsa block between firewall former F3 well balsa blocks around engine Leave enough room around engine have easy access engine mounting bolts free motion throttle arm its Kwik-Link point must decide whether mount top wing before after its covered designed 2/3 wing strut sandwiches top wing could covered painted before mounted lot room between wings using iron-on-covering wing can covered struts covered separately will need cut holes sheeting glue sandwiches spars recover holes Once wing mounted make four outer wing struts /I6 x wood Make eight aluminum plates drill lot 1A6 holes Use coping saw cut slot end struts accept plates Smear epoxy plates slots slip plates slots careful get epoxy exterior wood Use some burnt umber staln color struts give coat clear dope Slip strut top metal fitting leaving about /&i clearance between wing mark bolt position drill 3A2 hole through fitting strut Install 2-56 bolt nut lower end strut should fit nicely metal fitting top lower wing again leaving about 3/M clearance strut should put pressure wings Once fits drill 32 hole install 2-56 bolt procedure should repeated outer struts Covering On trip Japan asked wife stop hobby shop buy several yards silk went number hobby shops carried desperation bought some lightweight silk used make doll dresses used cover fuselage tail feathers put wet after dry brushed several coats clear dope sprayed silver initially appeared reasonably tight after short time crackup became loose baggy decided recover parts give model well worn look Im sure Moths must have appeared way after years hard service wings covered regular model silk have stayed smooth made engine cowl photographic purposes dont use flying put two-inch-scale Williams Brothers pilot rear cockpit Since biplane pilots look forward over side landing glue pilots head look direction Flying To take off advance throttle slowly plane will trundle along until tail comes off ground will roll along until just tap up elevator will begin steady climb little no additional up Once comfortable altitude throttle back halfway Like its full-size counterpart model requires coordinated rudder elevator aileron make proper turns turns aileron alone tend look pretty sloppy loop just dive bit buildup little extra speed pull back stick Moth will just putt-putt top loop down backside what appears slow motion Loops snap top accomplished giving full rudder elevator just before top ioop releasing about halfway through snap spin gain some altitude pull up sharply speed bleeds off give either full right left rudder full up elevator Moth spins equal facility both left right Slow rolls done building up little speed pulling up feeding aileron some rudder until rate roll established remainder roll accomplished elevator favorite pastimes take Moth flying field just before sun sets wingovers down sun low altitude Just get peak wingover sun glints off silver wing red letters look like spotlighted Landings joy behold Throttle back point engine just ticking over make standard rectangular approach model gets about 18 inches off ground hold level will float what seems like forever wheels finally touch down grass will roll another 10 yards before tail settles down pilots point view Gipsy Moth totally predictable never does anything untoward never does thing unexpected completely controllable attitudes does everything slow stately manner sharp contrast other models Moth maneuvers lowest possible throttle setting adds considerably realism flight Since built Gipsy Moth OS has replaced OS 20 four-stroke 26 Surpass Fortunately fits same engine mounts has same bolt-hole pattern 26 Surpass Gipsy Moth slightly overpowered As result spend some time adjusting throttle until get lowest possible reliable idle Otherwise will never land aircraft have designed built Moth fun fly always taxi back pits big grin fellow MARCS members never fail comment realistically Moth flies much fun watch go through its paces amazed much fun can 20 fourstroke engine half throttle 50-inch biplane Gipsy Moth has hundreds flights just plain fun hope enjoy much have * 40 Model Aviation ory Authorized E-Z UP Corp Dealer 1UXIU IUXID John Peck Leisure Productstg6068735172 131 RAVENWOOD RD AILLES KY 40383
Edition: Model Aviation - 1994/09
Page Numbers: 33, 34, 35, 36, 37, 38, 39, 40
he Moth biplane designed Geoffrey de Havilland 1925 sport aircraft Gipsy Moth created 1928 replacing original Airdisco engine Halforckdesigned 100 hp Gipsy engine Gipsy Moth instant success nd 1162 manufactured manufactured US Moth Aircraft Corporation f America thus earning US-approved type certificate During late 1920s early 1930s amazing long distanc ffights made Gipsy Moths included Amy Johnsons solo flight London and Australia Lady Baileys 18000 mile solo flight around Africa Lt Bentleys solo flight London Capetown South Africa Gipsy Moth recently featured movie Out Africa Unfortunately no Gipsy Moths left US British have purchased returned homeland However fellow California reputed converting Tiger Moths back Gipsy Moths number years ago beautiful all-white Gipsy Moth temporarily housed hangar next between EAA convention Bkkesburg Frank B Baker September 1994 33 AAA fly-in small size rather fragile beauty plane anchored itself back mind did come fore until purchased OS 20 four-stroke engine started thinking about biplanes Gipsy Moth became obvious plane build Arbitrarily selecting 50-inch wingspan enlarged excellent set threeviews appeared Aeromodeller result moderately sized model ideally matched its power plant 9 x 6 prop CONSTRUCTION standards Gipsy Moth particularly light model should take pains keep weight down Use epoxy very sparingly some reason adds weight very insidious manner Choosing weight balsa consistent its use also important Wings Since wings easiest part model will needed build fuselage lets start wing spars consist top bottom x ce balsa sandwiched between Use aliphatic resin glue laminate spars sure secure manner will ensure straight Note balsa spacer does go root rib plywood dihedral brace slips Since wings longer standard 48-inch strip make spars wing panel cut spruce pieces short center section Make wing ribs stacking /16 balsa blanks cutting band saw usually make ribs wing panel time Although plans show false rib between full rib did put just adds weight work Once ribs have cut lay out complete wing building board pin three segments spar place important keep three segments properly aligned problems arise putting dihedral braces remainder wing construction Left The Moth covered silk Finish silver dope sprayed over brushed-on clear dope base Below The Moth flies realistically predictably Turns require coordinated rudder elevator aileron V standard however will need trim ribs Y16 sheet used root end wing panels install sheeting top wing until wing cabane struts have fitted Once wing panels have built laminate 1/ x ce spar caps four dihedral braces trim fit holes wing spars Glue center section spar stubs slide holes wing panel spars block up wings get 12 inches dihedral outer 34 Model Aviafion 4 end rear spar After checking wings equal dihedral no twist let glue dry overnight Once panels have joined use razor saw cut rib 2 plywood dihedral plates cam glued front back spar eight 3A2 balsa center ribs can split lengthwise glued center section top wing top center section sheeted 42 provide sturdy hand hold no center section ribs lower wing spars glue directly fuselage Note ailerons lower wing like use nylon tubing bronze cable y Lobby HLH 805 actuate ailerons Bring nylon tubing forward per plans get large smooth-radius turn tubing makes 900 turn aileron will result smoothly functioning aileron personal preference use continuous length aileron cable Z piece wire soldered center hook onto servo arm install nylon tubing cable until lower wing has glued fuselagethe tubing runs fusleage cable runs through Cut eight outer wing strut supports some 015 aluminum sheet bend per plans drill bolt holes Use some soft copper wire bind strut supports wing spars sure top strut fittings point down bottom fittings point up Put liberal amount Ambroid glue over wire fittings cut slits /16 sheet goes over fittings glue sheets between appropriate ribs sheeting will provide place anchor covering area brackets end result about 5/ inch metal will out open Fuselage Build two fuselage sides directly over plans sure use hardest 3/is square balsa can find top bottom longerons install 3A6 sheet triangles rear cockpit until sides have joined Glue A2 plywood doubler inside fuselage side using epoxy Make plywood firewall cut holes engine mounts drill gas tank holes Lay firewall flat surface use epoxy glue maple engine mount beams Use several metal triangles insure beams 900 firewall no down thrust side thrust Epoxy /i plywood front beam former place Lay two fuselage sides top down flat surface about /2 inch front extending over end pin block straight Glue /6 square top bottom crosspieces F4 eventually goes Glue former B3 /l6 sheet grain crosswise goes B3 /l6 square crosspiece glue tail posts together Set fuselage aside make fuel tank like make own tanks K&S #254 easy solder tin sheet Make pattern doubling half-scale pattern plans cut tin accordingly Solder tank such rear can left open Cut lengths er tubing get auto-supply houses make two vents fuel line Run fuel line bottom center rear tank solder floor tank sure have soldered shut Leave three tubes coming straight out front tank solder both inside outside tank Close up back tank solder shut Use thinner some other solvent remove soldering paste Fill bucket water check tank leaks Once tank leak free drill holes firewall allow three tubes pass through Slip tubes partially through firewall put bit epoxy between tank firewall push tank forward hold until epoxy has set Bend center fuel line upward cut off leave about Y2 inch straight tubing fuel line slide scheme makes lot easier run fuel line carburetor back fourstroke engine Epoxy firewall assembly fuselage sides Again sure no down side thrust Glue / sheet tank support bottom tank top wing cabane struts built next September 1994 35 Basswood tail surface outlines laminated 1/16 strips soaked water wrapped around plywood forms Wing strut sandwiches designed allow addition top wing either before after covering Moths lower wing has 20 incidence top wing set 30 Robart incidence meter used set angles properly Bend / music wire per plans struts will attached fuselage using plywood sandwich has wire middle attach wings 2A sandwich wing spar forms third layer Cut sandwich centers 1/ plywood cut slot fit Vs music wire Cut back sandwich fuselage end wing ends 1/16 plywood Lay three Y16 plywood plates flat surface coat some slow-cure epoxy Lay c wire down fit /i plywood center pieces around put some epoxy sure fill space between wire plywood rear cabane strut lay down top 1/16 plywood plate wire goes across fuselage front cabane strut fuselage sandwich top plate consists former F3 1/8 Lite Ply wing ends cabane struts lay some plastic film over epoxy place weights three sandwiches both struts sure check plates have slid weights placed Remove fuselage building board Make two As plywood rear cabane strut fuselage doublers Glue front cabane strut sandwich F3 making sure 900 top fuselage let glue set Block up fuselage workbench set top longeron fuselage 00 Use some small C-clamps hold 2A sandwiches wing ends front cabane strut front front wing spar Loosely assemble rear cabane sandwich /is doublers Apply some slow curing epoxy glue slip assembly fuselage Again use some small Cclamps hold 2/3 sandwiches tops cabane struts front rear spar Use Robart incidence meter set top wing 300d incidence Slide fuselage end rear cabane strut doublers up down until proper incidence obtained important also measure wingtips workbench surface make sure wing sitting level use some Cclamps hold A6 plywood doublers fuselage sides Leave room until glue has set Although plans show sharp break rear cockpit cut longerons achieve break Simply glue tail posts together let longerons take natural bend may have make F5-F7 bit wider accommodate bend Glue top bottom 3/is square crosspieces vertical fuselage formers F4a-F7 After have glued top fuselage stringers use round file remove balsa between tops stringers better-looking fuselage Rough-cut balsa block fit between firewall former F3 carve shape Note firewall has square top transitions half-round F3 Hollow block glue Bend front cabane support wire make plywood sandwich Use soft copper wire bind top strut front cabane strut glue sandwich fuselage glue has set solder copper wire two struts careful overheat wire 2/3 sandwich could loosened top wing can now removed might well make cockpit hatch cover time simply A2 plywood floor formers 3A2 sheet bent over formers 1/ square spruce stringers add some strength prevent cockpit edges getting beat up due handling Bend two landing gear wires glue plywood sandwiches 36 Model Aviation leted framework ready cover 50-inch span proved idea match OS 20 26 9 x 6 prop Only lower wing has ailerons Author prefers use nylon tubing single length bronze cable Two-inch scale Williams Brothers pilot installed its head positioned would landing Cli I-i Type RO Scale Wingspan 50 inches Engine OS 20-26 Number channels Four Flying weight 68 ounces Construction Built-up Covering/finish Silk dope 1%uuu- PRANK 3AKR LniNrnED4-AS8 WOOD N N N N 1--- LPMINPThfl - SOPASS WOOD 5rNGRS MLJSC NIREN - AILISIC MFE FLY7 7 7 BLSfl BLOCKSMT JMUSC WRE 3 LVLLMSRO5 NN 7 32 1IIE GPSY-k1oTHER SEEs ALL AMThLL5 ALL FOR C OO Pt/ANT Th flv ]L& FurL/RE OF Th ETTz JEtJ 9LLAop oqCyEp CAJE CrOU DiMT FOoL /IE TO INSTANT INM PLSR RI&5TbUE NOT G77AJ ANY OF frW I-ION Ey/ OI Too &u, PEAD M CAt IN YOuR FUTURS WILL 7 TAKE AIASTER CI4ARE TE II TE ~LL IcL-r II NLN WOOD~ N N N jx RLSP k C CD CD CCD 0 0 CA -J Full-Size Plans AvailableSee Page 160 N 0 FU Iw a~i1 01 H~iI_ I~ CUa-U u\0Ia III ~0 2 Lwn 2 aI I b Ill __ 2/l aad tiIa aII 2][b472177704415280]]-~CD ia~ CaIS00 4Q4 U \4tIII18 _K 0II wII II 2 I~ 0 I HHI W LLU a-iTT~a II 8 Model Aviation l some working room lets take care servo installation First fit lower wing fuselage Use razor saw cut slots lower fuselage accept lower wing spars Note rear spar out open trailing edge wing quite bit below bottom fuselage because full-size Gipsy Moth folding wings folded lower wing trailing edge went under fuselage sure adjust slots lower wing has 20 incidence glue wing fuselage should some space between root rib fuselage side allow covering rib fuselage side Measure wingtips ensure lower wing level Use some epoxy glue main landing gear plywood sandwich fuselage forward lower wing spar Use piece 3/33 sheet balsa serve pattern aileron servo platform Trim until will fit between main landing gear plywood sandwich B3 Once fits duplicate /32 plywood glue place Make some 3/33 x ood strips width fuselage glue 1A6 below edge lower longerons front spar B3 serve screw plates servo hatch cover Make servo hatch cover 1Ao plywood sure build some curvature hatch cover hold some small glued-on strips matches lower longeron curvature Mount three servos side-by-side servo mount two -inch strips /i plywood slip 3/s-square maple servo mount rails fuselage slip three servos fuselage Mark screw holes e rails Pull servos rails out screw together Slip whole unit glue rails fuselage side former B3 Adjust position rails until bottoms three servos about /o inch above aileron servo plate sure rails parallel top longerons Now bottom fuselage can finished Clamp plywood sandwich forward 3A2 music wire landing gear back fuselage Measure main landing gear wire allow bend Remove unit bend ends wires Some trial-and-error bending twisting will needed until bends fit front main gear wire Once done epoxy plywood sandwich rear firewall wrap wires copper wire solder front supports main gear wire Solder two strips brass shim stock main landing gear leg glue airfoil-shaped balsa fairings Glue 3Ao sheet cross-grain firewall main landing gear sandwich Tail tail feathers standard construction Note ear post vertical fin goes way bottom fuselage Just looks used old free flight technique make curved outline pieces Cut pieces ood inner shape five empennage parts Soak lengths /16 square basswood water bend around form hold place masking tape Using white glue laminate four layers horizontal plane until outline YI6 thick Let glue dry day remove outlines forms Use small block plane smooth surface result will beautiful outline both strong light seems like too much work just cut outlines Ve6 sheet balsa lower rudder hinge fabricated 010 brass shim stock Wrap brass shim stock around 1A6 music wire solder shim stock together wire Remove wire use file remove appropriate metal result should look just like standard Du-Bro Klett nylon hinge Bend length Ve6 music wire fit 1 tail wheel Run wire through nylon Goldberg tail wheel bracket through brass hinge assembly Make 900 bend rear cut off per plans Use razor saw cut ical slot tail post fuselage Glue stabilizer top longerons forward end fuselage sure check its alignment above front Cut re slot vertical fin post fit rear stabilizer spar Glue vertical w w rAbsolutely Positively Bullet Proof 6OfBB 157H 078w x 161L 77 in/oz 16 sec Also available 605MGmetal gear tlrot 550 cuctoreer Order Supreme receiver wilt receive FREE BeItetPrvvf ret Absolutely Positively Bullet-Proof BUT DONT TAO IT LITERALLY ENIW C ServoB U FTJTABA G U EUTABA Y Apollo Cot Size Inches Wt Slot ROSES Type ec Ii p W c L Terlue 4BV Speed 4 September 1994 39 Hitec RCD Does Once Again new 8 Channel FM Supreme RICa SMALLER IdgIloBeir 7-ch EXs yet have tighter adjacent channel7O5liB METAL BEAR rejection higher 301P rejection20H 011W x 231 & sensitivIty tlntroductory 160 ifl/OZ 27 sec Price $7995 0he New Supreme Series Rzs require 0 hsruess utiliue 8th chsuuel RCD rmation u dealer nearest tall 619 2584940 0729 Put~tnds Ave Suite c CA 92071 SPORT PACK55414058p1617542uz019 Sec PRO-PACK15414 u0801617543 uz000 Sec ELECTRO-GUDE20312 u051309304 az000 Sec GIANT PACK15300011u233601335z002 Sec wII aid servo 10 55 1 14 08 16 170 43 uz 020 Sec SUS-MICK 0431105 tO 062 31 sz 5 4 fin onto stabilizer fuselage rear vertical fin post should flush end fuselage Drill 3A2 hole through vertical fin post centerline stabilizer flush rear stabilizer spar Feed /32 music wire connects two elevator halves through hole Install elevator hinges making sure line up same time glue connector wire holes elevators Install lower rudder hinge tail wheel assembly upper rudder hinge Make two pushrods hard re balsa 3A6 birch dowel install threaded rod Kwik-Links control surface ends will have put Z bends exit fuselage Attach Kwik-Links control surfaces fit front threaded rods Kwik-Links servos wrap threaded rod thread apply generous coating AmbroidWhile pushrods still place install 3A2 sheet goes both fuselage sides below stabilizer pushrods cannot removed fuselage unless make very large exit holes just leave Install engine decide way engine servo should mounted Drill hole firewall install nylon tubing Solder threaded connectors end cable Hook up throttle end feed cable servo cut appropriate length allowing threaded connector Kwik-Link necessary support nylon tubing couple points ensure functions properly Glue hollowed-out balsa block between firewall former F3 well balsa blocks around engine Leave enough room around engine have easy access engine mounting bolts free motion throttle arm its Kwik-Link point must decide whether mount top wing before after its covered designed 2/3 wing strut sandwiches top wing could covered painted before mounted lot room between wings using iron-on-covering wing can covered struts covered separately will need cut holes sheeting glue sandwiches spars recover holes Once wing mounted make four outer wing struts /I6 x wood Make eight aluminum plates drill lot 1A6 holes Use coping saw cut slot end struts accept plates Smear epoxy plates slots slip plates slots careful get epoxy exterior wood Use some burnt umber staln color struts give coat clear dope Slip strut top metal fitting leaving about /&i clearance between wing mark bolt position drill 3A2 hole through fitting strut Install 2-56 bolt nut lower end strut should fit nicely metal fitting top lower wing again leaving about 3/M clearance strut should put pressure wings Once fits drill 32 hole install 2-56 bolt procedure should repeated outer struts Covering On trip Japan asked wife stop hobby shop buy several yards silk went number hobby shops carried desperation bought some lightweight silk used make doll dresses used cover fuselage tail feathers put wet after dry brushed several coats clear dope sprayed silver initially appeared reasonably tight after short time crackup became loose baggy decided recover parts give model well worn look Im sure Moths must have appeared way after years hard service wings covered regular model silk have stayed smooth made engine cowl photographic purposes dont use flying put two-inch-scale Williams Brothers pilot rear cockpit Since biplane pilots look forward over side landing glue pilots head look direction Flying To take off advance throttle slowly plane will trundle along until tail comes off ground will roll along until just tap up elevator will begin steady climb little no additional up Once comfortable altitude throttle back halfway Like its full-size counterpart model requires coordinated rudder elevator aileron make proper turns turns aileron alone tend look pretty sloppy loop just dive bit buildup little extra speed pull back stick Moth will just putt-putt top loop down backside what appears slow motion Loops snap top accomplished giving full rudder elevator just before top ioop releasing about halfway through snap spin gain some altitude pull up sharply speed bleeds off give either full right left rudder full up elevator Moth spins equal facility both left right Slow rolls done building up little speed pulling up feeding aileron some rudder until rate roll established remainder roll accomplished elevator favorite pastimes take Moth flying field just before sun sets wingovers down sun low altitude Just get peak wingover sun glints off silver wing red letters look like spotlighted Landings joy behold Throttle back point engine just ticking over make standard rectangular approach model gets about 18 inches off ground hold level will float what seems like forever wheels finally touch down grass will roll another 10 yards before tail settles down pilots point view Gipsy Moth totally predictable never does anything untoward never does thing unexpected completely controllable attitudes does everything slow stately manner sharp contrast other models Moth maneuvers lowest possible throttle setting adds considerably realism flight Since built Gipsy Moth OS has replaced OS 20 four-stroke 26 Surpass Fortunately fits same engine mounts has same bolt-hole pattern 26 Surpass Gipsy Moth slightly overpowered As result spend some time adjusting throttle until get lowest possible reliable idle Otherwise will never land aircraft have designed built Moth fun fly always taxi back pits big grin fellow MARCS members never fail comment realistically Moth flies much fun watch go through its paces amazed much fun can 20 fourstroke engine half throttle 50-inch biplane Gipsy Moth has hundreds flights just plain fun hope enjoy much have * 40 Model Aviation ory Authorized E-Z UP Corp Dealer 1UXIU IUXID John Peck Leisure Productstg6068735172 131 RAVENWOOD RD AILLES KY 40383
Edition: Model Aviation - 1994/09
Page Numbers: 33, 34, 35, 36, 37, 38, 39, 40
he Moth biplane designed Geoffrey de Havilland 1925 sport aircraft Gipsy Moth created 1928 replacing original Airdisco engine Halforckdesigned 100 hp Gipsy engine Gipsy Moth instant success nd 1162 manufactured manufactured US Moth Aircraft Corporation f America thus earning US-approved type certificate During late 1920s early 1930s amazing long distanc ffights made Gipsy Moths included Amy Johnsons solo flight London and Australia Lady Baileys 18000 mile solo flight around Africa Lt Bentleys solo flight London Capetown South Africa Gipsy Moth recently featured movie Out Africa Unfortunately no Gipsy Moths left US British have purchased returned homeland However fellow California reputed converting Tiger Moths back Gipsy Moths number years ago beautiful all-white Gipsy Moth temporarily housed hangar next between EAA convention Bkkesburg Frank B Baker September 1994 33 AAA fly-in small size rather fragile beauty plane anchored itself back mind did come fore until purchased OS 20 four-stroke engine started thinking about biplanes Gipsy Moth became obvious plane build Arbitrarily selecting 50-inch wingspan enlarged excellent set threeviews appeared Aeromodeller result moderately sized model ideally matched its power plant 9 x 6 prop CONSTRUCTION standards Gipsy Moth particularly light model should take pains keep weight down Use epoxy very sparingly some reason adds weight very insidious manner Choosing weight balsa consistent its use also important Wings Since wings easiest part model will needed build fuselage lets start wing spars consist top bottom x ce balsa sandwiched between Use aliphatic resin glue laminate spars sure secure manner will ensure straight Note balsa spacer does go root rib plywood dihedral brace slips Since wings longer standard 48-inch strip make spars wing panel cut spruce pieces short center section Make wing ribs stacking /16 balsa blanks cutting band saw usually make ribs wing panel time Although plans show false rib between full rib did put just adds weight work Once ribs have cut lay out complete wing building board pin three segments spar place important keep three segments properly aligned problems arise putting dihedral braces remainder wing construction Left The Moth covered silk Finish silver dope sprayed over brushed-on clear dope base Below The Moth flies realistically predictably Turns require coordinated rudder elevator aileron V standard however will need trim ribs Y16 sheet used root end wing panels install sheeting top wing until wing cabane struts have fitted Once wing panels have built laminate 1/ x ce spar caps four dihedral braces trim fit holes wing spars Glue center section spar stubs slide holes wing panel spars block up wings get 12 inches dihedral outer 34 Model Aviafion 4 end rear spar After checking wings equal dihedral no twist let glue dry overnight Once panels have joined use razor saw cut rib 2 plywood dihedral plates cam glued front back spar eight 3A2 balsa center ribs can split lengthwise glued center section top wing top center section sheeted 42 provide sturdy hand hold no center section ribs lower wing spars glue directly fuselage Note ailerons lower wing like use nylon tubing bronze cable y Lobby HLH 805 actuate ailerons Bring nylon tubing forward per plans get large smooth-radius turn tubing makes 900 turn aileron will result smoothly functioning aileron personal preference use continuous length aileron cable Z piece wire soldered center hook onto servo arm install nylon tubing cable until lower wing has glued fuselagethe tubing runs fusleage cable runs through Cut eight outer wing strut supports some 015 aluminum sheet bend per plans drill bolt holes Use some soft copper wire bind strut supports wing spars sure top strut fittings point down bottom fittings point up Put liberal amount Ambroid glue over wire fittings cut slits /16 sheet goes over fittings glue sheets between appropriate ribs sheeting will provide place anchor covering area brackets end result about 5/ inch metal will out open Fuselage Build two fuselage sides directly over plans sure use hardest 3/is square balsa can find top bottom longerons install 3A6 sheet triangles rear cockpit until sides have joined Glue A2 plywood doubler inside fuselage side using epoxy Make plywood firewall cut holes engine mounts drill gas tank holes Lay firewall flat surface use epoxy glue maple engine mount beams Use several metal triangles insure beams 900 firewall no down thrust side thrust Epoxy /i plywood front beam former place Lay two fuselage sides top down flat surface about /2 inch front extending over end pin block straight Glue /6 square top bottom crosspieces F4 eventually goes Glue former B3 /l6 sheet grain crosswise goes B3 /l6 square crosspiece glue tail posts together Set fuselage aside make fuel tank like make own tanks K&S #254 easy solder tin sheet Make pattern doubling half-scale pattern plans cut tin accordingly Solder tank such rear can left open Cut lengths er tubing get auto-supply houses make two vents fuel line Run fuel line bottom center rear tank solder floor tank sure have soldered shut Leave three tubes coming straight out front tank solder both inside outside tank Close up back tank solder shut Use thinner some other solvent remove soldering paste Fill bucket water check tank leaks Once tank leak free drill holes firewall allow three tubes pass through Slip tubes partially through firewall put bit epoxy between tank firewall push tank forward hold until epoxy has set Bend center fuel line upward cut off leave about Y2 inch straight tubing fuel line slide scheme makes lot easier run fuel line carburetor back fourstroke engine Epoxy firewall assembly fuselage sides Again sure no down side thrust Glue / sheet tank support bottom tank top wing cabane struts built next September 1994 35 Basswood tail surface outlines laminated 1/16 strips soaked water wrapped around plywood forms Wing strut sandwiches designed allow addition top wing either before after covering Moths lower wing has 20 incidence top wing set 30 Robart incidence meter used set angles properly Bend / music wire per plans struts will attached fuselage using plywood sandwich has wire middle attach wings 2A sandwich wing spar forms third layer Cut sandwich centers 1/ plywood cut slot fit Vs music wire Cut back sandwich fuselage end wing ends 1/16 plywood Lay three Y16 plywood plates flat surface coat some slow-cure epoxy Lay c wire down fit /i plywood center pieces around put some epoxy sure fill space between wire plywood rear cabane strut lay down top 1/16 plywood plate wire goes across fuselage front cabane strut fuselage sandwich top plate consists former F3 1/8 Lite Ply wing ends cabane struts lay some plastic film over epoxy place weights three sandwiches both struts sure check plates have slid weights placed Remove fuselage building board Make two As plywood rear cabane strut fuselage doublers Glue front cabane strut sandwich F3 making sure 900 top fuselage let glue set Block up fuselage workbench set top longeron fuselage 00 Use some small C-clamps hold 2A sandwiches wing ends front cabane strut front front wing spar Loosely assemble rear cabane sandwich /is doublers Apply some slow curing epoxy glue slip assembly fuselage Again use some small Cclamps hold 2/3 sandwiches tops cabane struts front rear spar Use Robart incidence meter set top wing 300d incidence Slide fuselage end rear cabane strut doublers up down until proper incidence obtained important also measure wingtips workbench surface make sure wing sitting level use some Cclamps hold A6 plywood doublers fuselage sides Leave room until glue has set Although plans show sharp break rear cockpit cut longerons achieve break Simply glue tail posts together let longerons take natural bend may have make F5-F7 bit wider accommodate bend Glue top bottom 3/is square crosspieces vertical fuselage formers F4a-F7 After have glued top fuselage stringers use round file remove balsa between tops stringers better-looking fuselage Rough-cut balsa block fit between firewall former F3 carve shape Note firewall has square top transitions half-round F3 Hollow block glue Bend front cabane support wire make plywood sandwich Use soft copper wire bind top strut front cabane strut glue sandwich fuselage glue has set solder copper wire two struts careful overheat wire 2/3 sandwich could loosened top wing can now removed might well make cockpit hatch cover time simply A2 plywood floor formers 3A2 sheet bent over formers 1/ square spruce stringers add some strength prevent cockpit edges getting beat up due handling Bend two landing gear wires glue plywood sandwiches 36 Model Aviation leted framework ready cover 50-inch span proved idea match OS 20 26 9 x 6 prop Only lower wing has ailerons Author prefers use nylon tubing single length bronze cable Two-inch scale Williams Brothers pilot installed its head positioned would landing Cli I-i Type RO Scale Wingspan 50 inches Engine OS 20-26 Number channels Four Flying weight 68 ounces Construction Built-up Covering/finish Silk dope 1%uuu- PRANK 3AKR LniNrnED4-AS8 WOOD N N N N 1--- LPMINPThfl - SOPASS WOOD 5rNGRS MLJSC NIREN - AILISIC MFE FLY7 7 7 BLSfl BLOCKSMT JMUSC WRE 3 LVLLMSRO5 NN 7 32 1IIE GPSY-k1oTHER SEEs ALL AMThLL5 ALL FOR C OO Pt/ANT Th flv ]L& FurL/RE OF Th ETTz JEtJ 9LLAop oqCyEp CAJE CrOU DiMT FOoL /IE TO INSTANT INM PLSR RI&5TbUE NOT G77AJ ANY OF frW I-ION Ey/ OI Too &u, PEAD M CAt IN YOuR FUTURS WILL 7 TAKE AIASTER CI4ARE TE II TE ~LL IcL-r II NLN WOOD~ N N N jx RLSP k C CD CD CCD 0 0 CA -J Full-Size Plans AvailableSee Page 160 N 0 FU Iw a~i1 01 H~iI_ I~ CUa-U u\0Ia III ~0 2 Lwn 2 aI I b Ill __ 2/l aad tiIa aII 2][b472177704415280]]-~CD ia~ CaIS00 4Q4 U \4tIII18 _K 0II wII II 2 I~ 0 I HHI W LLU a-iTT~a II 8 Model Aviation l some working room lets take care servo installation First fit lower wing fuselage Use razor saw cut slots lower fuselage accept lower wing spars Note rear spar out open trailing edge wing quite bit below bottom fuselage because full-size Gipsy Moth folding wings folded lower wing trailing edge went under fuselage sure adjust slots lower wing has 20 incidence glue wing fuselage should some space between root rib fuselage side allow covering rib fuselage side Measure wingtips ensure lower wing level Use some epoxy glue main landing gear plywood sandwich fuselage forward lower wing spar Use piece 3/33 sheet balsa serve pattern aileron servo platform Trim until will fit between main landing gear plywood sandwich B3 Once fits duplicate /32 plywood glue place Make some 3/33 x ood strips width fuselage glue 1A6 below edge lower longerons front spar B3 serve screw plates servo hatch cover Make servo hatch cover 1Ao plywood sure build some curvature hatch cover hold some small glued-on strips matches lower longeron curvature Mount three servos side-by-side servo mount two -inch strips /i plywood slip 3/s-square maple servo mount rails fuselage slip three servos fuselage Mark screw holes e rails Pull servos rails out screw together Slip whole unit glue rails fuselage side former B3 Adjust position rails until bottoms three servos about /o inch above aileron servo plate sure rails parallel top longerons Now bottom fuselage can finished Clamp plywood sandwich forward 3A2 music wire landing gear back fuselage Measure main landing gear wire allow bend Remove unit bend ends wires Some trial-and-error bending twisting will needed until bends fit front main gear wire Once done epoxy plywood sandwich rear firewall wrap wires copper wire solder front supports main gear wire Solder two strips brass shim stock main landing gear leg glue airfoil-shaped balsa fairings Glue 3Ao sheet cross-grain firewall main landing gear sandwich Tail tail feathers standard construction Note ear post vertical fin goes way bottom fuselage Just looks used old free flight technique make curved outline pieces Cut pieces ood inner shape five empennage parts Soak lengths /16 square basswood water bend around form hold place masking tape Using white glue laminate four layers horizontal plane until outline YI6 thick Let glue dry day remove outlines forms Use small block plane smooth surface result will beautiful outline both strong light seems like too much work just cut outlines Ve6 sheet balsa lower rudder hinge fabricated 010 brass shim stock Wrap brass shim stock around 1A6 music wire solder shim stock together wire Remove wire use file remove appropriate metal result should look just like standard Du-Bro Klett nylon hinge Bend length Ve6 music wire fit 1 tail wheel Run wire through nylon Goldberg tail wheel bracket through brass hinge assembly Make 900 bend rear cut off per plans Use razor saw cut ical slot tail post fuselage Glue stabilizer top longerons forward end fuselage sure check its alignment above front Cut re slot vertical fin post fit rear stabilizer spar Glue vertical w w rAbsolutely Positively Bullet Proof 6OfBB 157H 078w x 161L 77 in/oz 16 sec Also available 605MGmetal gear tlrot 550 cuctoreer Order Supreme receiver wilt receive FREE BeItetPrvvf ret Absolutely Positively Bullet-Proof BUT DONT TAO IT LITERALLY ENIW C ServoB U FTJTABA G U EUTABA Y Apollo Cot Size Inches Wt Slot ROSES Type ec Ii p W c L Terlue 4BV Speed 4 September 1994 39 Hitec RCD Does Once Again new 8 Channel FM Supreme RICa SMALLER IdgIloBeir 7-ch EXs yet have tighter adjacent channel7O5liB METAL BEAR rejection higher 301P rejection20H 011W x 231 & sensitivIty tlntroductory 160 ifl/OZ 27 sec Price $7995 0he New Supreme Series Rzs require 0 hsruess utiliue 8th chsuuel RCD rmation u dealer nearest tall 619 2584940 0729 Put~tnds Ave Suite c CA 92071 SPORT PACK55414058p1617542uz019 Sec PRO-PACK15414 u0801617543 uz000 Sec ELECTRO-GUDE20312 u051309304 az000 Sec GIANT PACK15300011u233601335z002 Sec wII aid servo 10 55 1 14 08 16 170 43 uz 020 Sec SUS-MICK 0431105 tO 062 31 sz 5 4 fin onto stabilizer fuselage rear vertical fin post should flush end fuselage Drill 3A2 hole through vertical fin post centerline stabilizer flush rear stabilizer spar Feed /32 music wire connects two elevator halves through hole Install elevator hinges making sure line up same time glue connector wire holes elevators Install lower rudder hinge tail wheel assembly upper rudder hinge Make two pushrods hard re balsa 3A6 birch dowel install threaded rod Kwik-Links control surface ends will have put Z bends exit fuselage Attach Kwik-Links control surfaces fit front threaded rods Kwik-Links servos wrap threaded rod thread apply generous coating AmbroidWhile pushrods still place install 3A2 sheet goes both fuselage sides below stabilizer pushrods cannot removed fuselage unless make very large exit holes just leave Install engine decide way engine servo should mounted Drill hole firewall install nylon tubing Solder threaded connectors end cable Hook up throttle end feed cable servo cut appropriate length allowing threaded connector Kwik-Link necessary support nylon tubing couple points ensure functions properly Glue hollowed-out balsa block between firewall former F3 well balsa blocks around engine Leave enough room around engine have easy access engine mounting bolts free motion throttle arm its Kwik-Link point must decide whether mount top wing before after its covered designed 2/3 wing strut sandwiches top wing could covered painted before mounted lot room between wings using iron-on-covering wing can covered struts covered separately will need cut holes sheeting glue sandwiches spars recover holes Once wing mounted make four outer wing struts /I6 x wood Make eight aluminum plates drill lot 1A6 holes Use coping saw cut slot end struts accept plates Smear epoxy plates slots slip plates slots careful get epoxy exterior wood Use some burnt umber staln color struts give coat clear dope Slip strut top metal fitting leaving about /&i clearance between wing mark bolt position drill 3A2 hole through fitting strut Install 2-56 bolt nut lower end strut should fit nicely metal fitting top lower wing again leaving about 3/M clearance strut should put pressure wings Once fits drill 32 hole install 2-56 bolt procedure should repeated outer struts Covering On trip Japan asked wife stop hobby shop buy several yards silk went number hobby shops carried desperation bought some lightweight silk used make doll dresses used cover fuselage tail feathers put wet after dry brushed several coats clear dope sprayed silver initially appeared reasonably tight after short time crackup became loose baggy decided recover parts give model well worn look Im sure Moths must have appeared way after years hard service wings covered regular model silk have stayed smooth made engine cowl photographic purposes dont use flying put two-inch-scale Williams Brothers pilot rear cockpit Since biplane pilots look forward over side landing glue pilots head look direction Flying To take off advance throttle slowly plane will trundle along until tail comes off ground will roll along until just tap up elevator will begin steady climb little no additional up Once comfortable altitude throttle back halfway Like its full-size counterpart model requires coordinated rudder elevator aileron make proper turns turns aileron alone tend look pretty sloppy loop just dive bit buildup little extra speed pull back stick Moth will just putt-putt top loop down backside what appears slow motion Loops snap top accomplished giving full rudder elevator just before top ioop releasing about halfway through snap spin gain some altitude pull up sharply speed bleeds off give either full right left rudder full up elevator Moth spins equal facility both left right Slow rolls done building up little speed pulling up feeding aileron some rudder until rate roll established remainder roll accomplished elevator favorite pastimes take Moth flying field just before sun sets wingovers down sun low altitude Just get peak wingover sun glints off silver wing red letters look like spotlighted Landings joy behold Throttle back point engine just ticking over make standard rectangular approach model gets about 18 inches off ground hold level will float what seems like forever wheels finally touch down grass will roll another 10 yards before tail settles down pilots point view Gipsy Moth totally predictable never does anything untoward never does thing unexpected completely controllable attitudes does everything slow stately manner sharp contrast other models Moth maneuvers lowest possible throttle setting adds considerably realism flight Since built Gipsy Moth OS has replaced OS 20 four-stroke 26 Surpass Fortunately fits same engine mounts has same bolt-hole pattern 26 Surpass Gipsy Moth slightly overpowered As result spend some time adjusting throttle until get lowest possible reliable idle Otherwise will never land aircraft have designed built Moth fun fly always taxi back pits big grin fellow MARCS members never fail comment realistically Moth flies much fun watch go through its paces amazed much fun can 20 fourstroke engine half throttle 50-inch biplane Gipsy Moth has hundreds flights just plain fun hope enjoy much have * 40 Model Aviation ory Authorized E-Z UP Corp Dealer 1UXIU IUXID John Peck Leisure Productstg6068735172 131 RAVENWOOD RD AILLES KY 40383