C10~settirug kina Catapult gliders have around awhile various forms includi0 pole-mounted catapult variety4 P110 became popular among several free flight clubs late 1970s mid-1980s Central Indiana Aeromodelers began promoting simple set rules hand-held catapults wasnt long before event gained popularity local regional meets became provisional AMA event 1993 1994 Catapult Glider became official AMA event gained further popularity especially Midwest event has brought old hand-launch glider HLG fliers out retirement can now fly again allows Juniors throw nearly hard adults rules simple contestant must launch model hand-held catapult consisting single loop er maximum length nine inches mounted dowel maximum length six inches keep event simple no limitations put glider except rigid-wing requirement prohibition autovariable-geometry surfaces weight no 15 ounces August 1995 43 4 0 Six flights scored maximum flight time max two minutes per flight flights scored regardless duration contestant scores three maxes series six flights proceeds flyoff flights flyoff flights proceed same two-minute max until max missed Again flights scored consistency becomes important way catapult glider achieve its highest potential trim nearly straight-up climbhence models name HLG fliers have long known technique since its nearly impossible throw HLG straight up enough incidence usually added permit somewhat shallow launch increased incidence also added consistency helped make launch less critical Because hand-held catapult glider can launched angle consistency model takes full advantage trim technique nearly straight-up Combined its simple construction light weight spin-tab dethermalizer DT Straight-Up makes very competitive model Try twothey fun CONSTRUCTION Attention detail difference between average glider great Adhesive Thick cyanoacrylate CyA glue works well though other types glue may substituted desired Wing Choose medium-weight 7-lb stock piece 1/ balsa preferably C-grain Cut planform shown carve sand airfoil being careful maintain high point indicated plan lar way fly event contests fly pen technique invented Steve Geraghty HLG US Free Flight Championships also uscd 1994 United States Outdoor Championships both HLG Catapult Glider [he pen designated flying site official flying must take place pen triangular area designated traffic cones f1gs spaced about 1X feet apart official flying must done pen Nothing no other fliers making official flights models permitted pen timers coaches spectators thermal-sensing devices chase bikes etc must located outside pen Thermal-sensing devices prohibited simply permitted pen fact having concentrated near pen often helps Iliers detect thermals otherwise might pass Having pen dim i sioned 100 feet also helps enforce AMA nile timer may move 200 feet timing flight result great fun official flying clone center stage manpower permits official scoreboard event can maintained pen eliminating dreaded walk officials table have score recorded after flight remark increased interest spectators did have chase around field looking flying particular event Its also great because everyone gets know another see others models learn others flying techniques best become friends often missed go off own corners field recent contest did use pen found out really missed flying good-natured huddle HLG fliers camping out different area flew hope future major contests will consider using pen both HLG Catapult Glider 44 Model Aviation -Size Plans page 45 100 FT Spin-tab dethermalizer pops open after fuse burns throughRear fuselage has sandpaper grips consistent accurate retaining rubber band spiraling model back groundlaunches Color rudder/tips added visibility Straight Up simple hand-held catapult glider designed drawn Joe Mekina September 1994 wing area sq projected stab area q weight ox 13 grams LLIZL ~~42 fl Good Luck taper tovard i9 WING 1/8 balsa high point .3lA 4 dihedral detail trim tab left wing bend down 1/16 AIRFOIL SECTIONS tip 111 CATAPULT 9 loop 1/4 rubber 6 dowel break root f- 3I16 10 snuffer tube ental rubber band1/4 x 1/8 balsa 3/16 diameter 07z thread wrap Fly close 00 right-left pattern STAB 1/32 balsa slight left stab tilt OT will spiral model out thermal 1-I Co C 0 0 FUSELAGE 114x118x17-114 sDruce lead clay wrap front aluminumRUDDER balance foil prevent burningDT flap left side cut aluminum pop can1/32 balsa curved outward glue rear prior thread wrap taper fuselage behind wing top sandpaper grips both sides wing should also taper toward tip Begin sanding 1 80-grit sandpaper 220 finish 400 After wing sanded shape cut dihedral breaks sand angles shown Glue dihedral joints set aside final assembly Fuselage Choose straight piece /s x spruce Mark wing stabilizer positions top bottom fuselage tapered behind wing top careful sand areas marked off wing stab help alignment process rear fuselage has small finger grip aid launching model Stabilizer Rudder Cut light 5-7 lb stock 1A2 balsa preferably C-grain Round edges thin toward tips maintaining symmetrical airfoil Again attention detail important Hook Bend piece 047 music wire shown plans hook must have smooth radius catapult can disengage freely Drill small hole fuselage anchor hook cut slot forward hole straight part hook lay glue hook place until final assembly Dethermalizer optional highly recommendedparticularly glider will flown contests object game fly glider thermals dethermalizer simple fuse-operated spin tab cut aluminum soft-drink can Cut tab scissors lay aside final assembly snuffer tube made 3A6 ID aluminum tubing Final Assembly Glue stab fuselage placing building surface shimming front fuselage scrap 1A2 balsa maintain near-zero incidence ION OWER LESS HASSLE USE Nil elize Davis Diesel Its Awesome 4 50% Power Same Easy Starting No Glow Plugs Runs llvice Long 4ornts Scale Sound DAVIS MODEL PRODUCTS P0 Box 141 DeptMAMilfordCT06460 2O3-877-..O complete inrmotion packet send $400 Icredit applied first orderl No Morn Sags Works WIth Iron-On Coverings No Need Use Any Prep Easy Use n1EWOODPRXFR will weaken integrIty structure Send Check/Money Order Directly UNIQUE MODEL PRODUCTS RO Boa 2229 Lake Arrowhead CA 92352-2229 FO lntotntatAn CAl 9091 390-SAS2 FA5 509 336-2715 August1995 47 THE WOODPECKER8 First Conve b e Mul Purpo e Co e ng Too NOW YOU CAN COVER LIKE THE PROS No Bubbles Covering Looks Great Long After Its Applied Film Over Film No Problem THE WCKDPKXFR easily converts allow apply trims choice See Hobby Dealer First zOnI$95 Visa & MIC AcceptedCA resid90A add 5775% sales las Made USAFor orders onlyAll Steel consoaclion1-800-336-5602 Tills aOl Sony No CODsDEALER INQUIRIES WELCOME Glue wing place placing blocks under wing half achieve slight left stab tilt left wing down careful keep piece scrap 1/32 under front fuselage during process Glue rudder being careful aligned straight possible Add piece /8 x a form top front fuselage added piece found necessary increase size effectiveness dethermalizer spin tab Earlier versions model did dethermalize consistently resulted loss model front area covered aluminum foil prevent DT fuse burning wood Add catapult hook dethermalizer spin tab wrap thread cover glue Glue small pieces sandpaper finger grip assist holding model during launch Finish The wing tail surfaces finished sanding sealer nitrate dope two coats sealer thinned 50% wing coat tail Apply two coats clear nitrate dope also thinned 50% entire model Always sand between coats 500-grit sandpaper simple finishing technique lightly spray entire model clear lacquer available department stores finish will tend somewhat heavier works well usually add color model lightly spraying tips surfaces orange fluorescent paint Dont add too much colorit will make model overweight Catapult catapult made 1/2 diameter dowel six inches long /4 deep slot cut top hold loop rubber Several knots keep rubber slipping through slot stretched nine-inch loop rubber maximum permitted too long people due arm length ability stretch rubber its maximum energy Tuning length rubber particularly important Juniors people dont have long arms Ive found 71/28 inches works best Tilting dowel forward about 200 during launch can gain stretch distance gives bit clearance Flying Test-fly calm airpreferably early morning evening thermal conditions minimal DT needed Balance model clay lead indicated point Test glide set rudder slight left turn should good starting point catapult launches Begin catapult launches roughly 800 launch angle slight bank right slightly less full pull Once model close final trim always launch full pull maintain consistent launch velocity Adjust incidence rudder obtain nearly straight-up climb /2 3/4 turn top glide can fine-tuned along way adding removing nose weight obtain gentle glide small amount washin may necessary keep model spiraling out thermal cut small tab left main panel deflect about 146 inch glue place Contests still-air capability model about 60-70 seconds thermals needed achieve max flights Flying right time becomes all-important factor contest flying great model poor air will often beaten not-sogreat model great air thermal-picking becomes necessity thermal cannot seen its effects can Experience perhaps best teacher Ill offer some things allow see thermals effects bubbles fluff streamers marker models temperature indicators timing interval between thermals butterflies flying 50 feet hawk gracefully circling overhead heat mirage horizon course just plain old intuition Thermals also tend come different varieties its necessary choose right type glider Dont fooled gas model thermaling hot 900 feet glider can reach 100 feet typical day low-altitude thermal activity best between about 11 am 230 pm its best plan flying during time Know glider know its quirks pulls out relation launch behaves both calm windy conditions centers lift best way find thermals know model course practice thats fun See flying field 4Tow Planes Scale Sailplanes Up Six Meters Available 1/375 Discus Krause ers 1/3 Salto Krause 1/375 ASW 27 Krause Sailpianes Unlimited Ltd 63 East 82nd St New York NY 10028 12-879-1634 212-535-5295 1/385 ASK 18 Roke 1/45 ASK 21 Roedel 1/3 DG 600 Ripo ELECFRONIC WASHOUT IMPROVES SAFETY MARGIN plane shows signs tipstalling inappropriate times 1OSX may have capability help plane uses seperate servos barn-door style outboard ailerons using special multi-point mix function included 1OSX two aileron servos can programmed raise slightly elevator travel increased Around neutral chance snapping remote ailerons remain normal commanded position Through experimentation will discover what point elevator travel ailerons should rise much example below shows set-up ailerons begin rise 50% up elevator stick rise about 3/8at full travel Using electronic washout lot convenient cutting wing create washout adding unsightly devices such stall strips Once properiy pro grammed might turn nasty plane favorites Give try. its easy JR 1ff August1995 49 NUMBER FOUR IN SERIES
Edition: Model Aviation - 1995/08
Page Numbers: 43, 44, 45, 47, 49
C10~settirug kina Catapult gliders have around awhile various forms includi0 pole-mounted catapult variety4 P110 became popular among several free flight clubs late 1970s mid-1980s Central Indiana Aeromodelers began promoting simple set rules hand-held catapults wasnt long before event gained popularity local regional meets became provisional AMA event 1993 1994 Catapult Glider became official AMA event gained further popularity especially Midwest event has brought old hand-launch glider HLG fliers out retirement can now fly again allows Juniors throw nearly hard adults rules simple contestant must launch model hand-held catapult consisting single loop er maximum length nine inches mounted dowel maximum length six inches keep event simple no limitations put glider except rigid-wing requirement prohibition autovariable-geometry surfaces weight no 15 ounces August 1995 43 4 0 Six flights scored maximum flight time max two minutes per flight flights scored regardless duration contestant scores three maxes series six flights proceeds flyoff flights flyoff flights proceed same two-minute max until max missed Again flights scored consistency becomes important way catapult glider achieve its highest potential trim nearly straight-up climbhence models name HLG fliers have long known technique since its nearly impossible throw HLG straight up enough incidence usually added permit somewhat shallow launch increased incidence also added consistency helped make launch less critical Because hand-held catapult glider can launched angle consistency model takes full advantage trim technique nearly straight-up Combined its simple construction light weight spin-tab dethermalizer DT Straight-Up makes very competitive model Try twothey fun CONSTRUCTION Attention detail difference between average glider great Adhesive Thick cyanoacrylate CyA glue works well though other types glue may substituted desired Wing Choose medium-weight 7-lb stock piece 1/ balsa preferably C-grain Cut planform shown carve sand airfoil being careful maintain high point indicated plan lar way fly event contests fly pen technique invented Steve Geraghty HLG US Free Flight Championships also uscd 1994 United States Outdoor Championships both HLG Catapult Glider [he pen designated flying site official flying must take place pen triangular area designated traffic cones f1gs spaced about 1X feet apart official flying must done pen Nothing no other fliers making official flights models permitted pen timers coaches spectators thermal-sensing devices chase bikes etc must located outside pen Thermal-sensing devices prohibited simply permitted pen fact having concentrated near pen often helps Iliers detect thermals otherwise might pass Having pen dim i sioned 100 feet also helps enforce AMA nile timer may move 200 feet timing flight result great fun official flying clone center stage manpower permits official scoreboard event can maintained pen eliminating dreaded walk officials table have score recorded after flight remark increased interest spectators did have chase around field looking flying particular event Its also great because everyone gets know another see others models learn others flying techniques best become friends often missed go off own corners field recent contest did use pen found out really missed flying good-natured huddle HLG fliers camping out different area flew hope future major contests will consider using pen both HLG Catapult Glider 44 Model Aviation -Size Plans page 45 100 FT Spin-tab dethermalizer pops open after fuse burns throughRear fuselage has sandpaper grips consistent accurate retaining rubber band spiraling model back groundlaunches Color rudder/tips added visibility Straight Up simple hand-held catapult glider designed drawn Joe Mekina September 1994 wing area sq projected stab area q weight ox 13 grams LLIZL ~~42 fl Good Luck taper tovard i9 WING 1/8 balsa high point .3lA 4 dihedral detail trim tab left wing bend down 1/16 AIRFOIL SECTIONS tip 111 CATAPULT 9 loop 1/4 rubber 6 dowel break root f- 3I16 10 snuffer tube ental rubber band1/4 x 1/8 balsa 3/16 diameter 07z thread wrap Fly close 00 right-left pattern STAB 1/32 balsa slight left stab tilt OT will spiral model out thermal 1-I Co C 0 0 FUSELAGE 114x118x17-114 sDruce lead clay wrap front aluminumRUDDER balance foil prevent burningDT flap left side cut aluminum pop can1/32 balsa curved outward glue rear prior thread wrap taper fuselage behind wing top sandpaper grips both sides wing should also taper toward tip Begin sanding 1 80-grit sandpaper 220 finish 400 After wing sanded shape cut dihedral breaks sand angles shown Glue dihedral joints set aside final assembly Fuselage Choose straight piece /s x spruce Mark wing stabilizer positions top bottom fuselage tapered behind wing top careful sand areas marked off wing stab help alignment process rear fuselage has small finger grip aid launching model Stabilizer Rudder Cut light 5-7 lb stock 1A2 balsa preferably C-grain Round edges thin toward tips maintaining symmetrical airfoil Again attention detail important Hook Bend piece 047 music wire shown plans hook must have smooth radius catapult can disengage freely Drill small hole fuselage anchor hook cut slot forward hole straight part hook lay glue hook place until final assembly Dethermalizer optional highly recommendedparticularly glider will flown contests object game fly glider thermals dethermalizer simple fuse-operated spin tab cut aluminum soft-drink can Cut tab scissors lay aside final assembly snuffer tube made 3A6 ID aluminum tubing Final Assembly Glue stab fuselage placing building surface shimming front fuselage scrap 1A2 balsa maintain near-zero incidence ION OWER LESS HASSLE USE Nil elize Davis Diesel Its Awesome 4 50% Power Same Easy Starting No Glow Plugs Runs llvice Long 4ornts Scale Sound DAVIS MODEL PRODUCTS P0 Box 141 DeptMAMilfordCT06460 2O3-877-..O complete inrmotion packet send $400 Icredit applied first orderl No Morn Sags Works WIth Iron-On Coverings No Need Use Any Prep Easy Use n1EWOODPRXFR will weaken integrIty structure Send Check/Money Order Directly UNIQUE MODEL PRODUCTS RO Boa 2229 Lake Arrowhead CA 92352-2229 FO lntotntatAn CAl 9091 390-SAS2 FA5 509 336-2715 August1995 47 THE WOODPECKER8 First Conve b e Mul Purpo e Co e ng Too NOW YOU CAN COVER LIKE THE PROS No Bubbles Covering Looks Great Long After Its Applied Film Over Film No Problem THE WCKDPKXFR easily converts allow apply trims choice See Hobby Dealer First zOnI$95 Visa & MIC AcceptedCA resid90A add 5775% sales las Made USAFor orders onlyAll Steel consoaclion1-800-336-5602 Tills aOl Sony No CODsDEALER INQUIRIES WELCOME Glue wing place placing blocks under wing half achieve slight left stab tilt left wing down careful keep piece scrap 1/32 under front fuselage during process Glue rudder being careful aligned straight possible Add piece /8 x a form top front fuselage added piece found necessary increase size effectiveness dethermalizer spin tab Earlier versions model did dethermalize consistently resulted loss model front area covered aluminum foil prevent DT fuse burning wood Add catapult hook dethermalizer spin tab wrap thread cover glue Glue small pieces sandpaper finger grip assist holding model during launch Finish The wing tail surfaces finished sanding sealer nitrate dope two coats sealer thinned 50% wing coat tail Apply two coats clear nitrate dope also thinned 50% entire model Always sand between coats 500-grit sandpaper simple finishing technique lightly spray entire model clear lacquer available department stores finish will tend somewhat heavier works well usually add color model lightly spraying tips surfaces orange fluorescent paint Dont add too much colorit will make model overweight Catapult catapult made 1/2 diameter dowel six inches long /4 deep slot cut top hold loop rubber Several knots keep rubber slipping through slot stretched nine-inch loop rubber maximum permitted too long people due arm length ability stretch rubber its maximum energy Tuning length rubber particularly important Juniors people dont have long arms Ive found 71/28 inches works best Tilting dowel forward about 200 during launch can gain stretch distance gives bit clearance Flying Test-fly calm airpreferably early morning evening thermal conditions minimal DT needed Balance model clay lead indicated point Test glide set rudder slight left turn should good starting point catapult launches Begin catapult launches roughly 800 launch angle slight bank right slightly less full pull Once model close final trim always launch full pull maintain consistent launch velocity Adjust incidence rudder obtain nearly straight-up climb /2 3/4 turn top glide can fine-tuned along way adding removing nose weight obtain gentle glide small amount washin may necessary keep model spiraling out thermal cut small tab left main panel deflect about 146 inch glue place Contests still-air capability model about 60-70 seconds thermals needed achieve max flights Flying right time becomes all-important factor contest flying great model poor air will often beaten not-sogreat model great air thermal-picking becomes necessity thermal cannot seen its effects can Experience perhaps best teacher Ill offer some things allow see thermals effects bubbles fluff streamers marker models temperature indicators timing interval between thermals butterflies flying 50 feet hawk gracefully circling overhead heat mirage horizon course just plain old intuition Thermals also tend come different varieties its necessary choose right type glider Dont fooled gas model thermaling hot 900 feet glider can reach 100 feet typical day low-altitude thermal activity best between about 11 am 230 pm its best plan flying during time Know glider know its quirks pulls out relation launch behaves both calm windy conditions centers lift best way find thermals know model course practice thats fun See flying field 4Tow Planes Scale Sailplanes Up Six Meters Available 1/375 Discus Krause ers 1/3 Salto Krause 1/375 ASW 27 Krause Sailpianes Unlimited Ltd 63 East 82nd St New York NY 10028 12-879-1634 212-535-5295 1/385 ASK 18 Roke 1/45 ASK 21 Roedel 1/3 DG 600 Ripo ELECFRONIC WASHOUT IMPROVES SAFETY MARGIN plane shows signs tipstalling inappropriate times 1OSX may have capability help plane uses seperate servos barn-door style outboard ailerons using special multi-point mix function included 1OSX two aileron servos can programmed raise slightly elevator travel increased Around neutral chance snapping remote ailerons remain normal commanded position Through experimentation will discover what point elevator travel ailerons should rise much example below shows set-up ailerons begin rise 50% up elevator stick rise about 3/8at full travel Using electronic washout lot convenient cutting wing create washout adding unsightly devices such stall strips Once properiy pro grammed might turn nasty plane favorites Give try. its easy JR 1ff August1995 49 NUMBER FOUR IN SERIES
Edition: Model Aviation - 1995/08
Page Numbers: 43, 44, 45, 47, 49
C10~settirug kina Catapult gliders have around awhile various forms includi0 pole-mounted catapult variety4 P110 became popular among several free flight clubs late 1970s mid-1980s Central Indiana Aeromodelers began promoting simple set rules hand-held catapults wasnt long before event gained popularity local regional meets became provisional AMA event 1993 1994 Catapult Glider became official AMA event gained further popularity especially Midwest event has brought old hand-launch glider HLG fliers out retirement can now fly again allows Juniors throw nearly hard adults rules simple contestant must launch model hand-held catapult consisting single loop er maximum length nine inches mounted dowel maximum length six inches keep event simple no limitations put glider except rigid-wing requirement prohibition autovariable-geometry surfaces weight no 15 ounces August 1995 43 4 0 Six flights scored maximum flight time max two minutes per flight flights scored regardless duration contestant scores three maxes series six flights proceeds flyoff flights flyoff flights proceed same two-minute max until max missed Again flights scored consistency becomes important way catapult glider achieve its highest potential trim nearly straight-up climbhence models name HLG fliers have long known technique since its nearly impossible throw HLG straight up enough incidence usually added permit somewhat shallow launch increased incidence also added consistency helped make launch less critical Because hand-held catapult glider can launched angle consistency model takes full advantage trim technique nearly straight-up Combined its simple construction light weight spin-tab dethermalizer DT Straight-Up makes very competitive model Try twothey fun CONSTRUCTION Attention detail difference between average glider great Adhesive Thick cyanoacrylate CyA glue works well though other types glue may substituted desired Wing Choose medium-weight 7-lb stock piece 1/ balsa preferably C-grain Cut planform shown carve sand airfoil being careful maintain high point indicated plan lar way fly event contests fly pen technique invented Steve Geraghty HLG US Free Flight Championships also uscd 1994 United States Outdoor Championships both HLG Catapult Glider [he pen designated flying site official flying must take place pen triangular area designated traffic cones f1gs spaced about 1X feet apart official flying must done pen Nothing no other fliers making official flights models permitted pen timers coaches spectators thermal-sensing devices chase bikes etc must located outside pen Thermal-sensing devices prohibited simply permitted pen fact having concentrated near pen often helps Iliers detect thermals otherwise might pass Having pen dim i sioned 100 feet also helps enforce AMA nile timer may move 200 feet timing flight result great fun official flying clone center stage manpower permits official scoreboard event can maintained pen eliminating dreaded walk officials table have score recorded after flight remark increased interest spectators did have chase around field looking flying particular event Its also great because everyone gets know another see others models learn others flying techniques best become friends often missed go off own corners field recent contest did use pen found out really missed flying good-natured huddle HLG fliers camping out different area flew hope future major contests will consider using pen both HLG Catapult Glider 44 Model Aviation -Size Plans page 45 100 FT Spin-tab dethermalizer pops open after fuse burns throughRear fuselage has sandpaper grips consistent accurate retaining rubber band spiraling model back groundlaunches Color rudder/tips added visibility Straight Up simple hand-held catapult glider designed drawn Joe Mekina September 1994 wing area sq projected stab area q weight ox 13 grams LLIZL ~~42 fl Good Luck taper tovard i9 WING 1/8 balsa high point .3lA 4 dihedral detail trim tab left wing bend down 1/16 AIRFOIL SECTIONS tip 111 CATAPULT 9 loop 1/4 rubber 6 dowel break root f- 3I16 10 snuffer tube ental rubber band1/4 x 1/8 balsa 3/16 diameter 07z thread wrap Fly close 00 right-left pattern STAB 1/32 balsa slight left stab tilt OT will spiral model out thermal 1-I Co C 0 0 FUSELAGE 114x118x17-114 sDruce lead clay wrap front aluminumRUDDER balance foil prevent burningDT flap left side cut aluminum pop can1/32 balsa curved outward glue rear prior thread wrap taper fuselage behind wing top sandpaper grips both sides wing should also taper toward tip Begin sanding 1 80-grit sandpaper 220 finish 400 After wing sanded shape cut dihedral breaks sand angles shown Glue dihedral joints set aside final assembly Fuselage Choose straight piece /s x spruce Mark wing stabilizer positions top bottom fuselage tapered behind wing top careful sand areas marked off wing stab help alignment process rear fuselage has small finger grip aid launching model Stabilizer Rudder Cut light 5-7 lb stock 1A2 balsa preferably C-grain Round edges thin toward tips maintaining symmetrical airfoil Again attention detail important Hook Bend piece 047 music wire shown plans hook must have smooth radius catapult can disengage freely Drill small hole fuselage anchor hook cut slot forward hole straight part hook lay glue hook place until final assembly Dethermalizer optional highly recommendedparticularly glider will flown contests object game fly glider thermals dethermalizer simple fuse-operated spin tab cut aluminum soft-drink can Cut tab scissors lay aside final assembly snuffer tube made 3A6 ID aluminum tubing Final Assembly Glue stab fuselage placing building surface shimming front fuselage scrap 1A2 balsa maintain near-zero incidence ION OWER LESS HASSLE USE Nil elize Davis Diesel Its Awesome 4 50% Power Same Easy Starting No Glow Plugs Runs llvice Long 4ornts Scale Sound DAVIS MODEL PRODUCTS P0 Box 141 DeptMAMilfordCT06460 2O3-877-..O complete inrmotion packet send $400 Icredit applied first orderl No Morn Sags Works WIth Iron-On Coverings No Need Use Any Prep Easy Use n1EWOODPRXFR will weaken integrIty structure Send Check/Money Order Directly UNIQUE MODEL PRODUCTS RO Boa 2229 Lake Arrowhead CA 92352-2229 FO lntotntatAn CAl 9091 390-SAS2 FA5 509 336-2715 August1995 47 THE WOODPECKER8 First Conve b e Mul Purpo e Co e ng Too NOW YOU CAN COVER LIKE THE PROS No Bubbles Covering Looks Great Long After Its Applied Film Over Film No Problem THE WCKDPKXFR easily converts allow apply trims choice See Hobby Dealer First zOnI$95 Visa & MIC AcceptedCA resid90A add 5775% sales las Made USAFor orders onlyAll Steel consoaclion1-800-336-5602 Tills aOl Sony No CODsDEALER INQUIRIES WELCOME Glue wing place placing blocks under wing half achieve slight left stab tilt left wing down careful keep piece scrap 1/32 under front fuselage during process Glue rudder being careful aligned straight possible Add piece /8 x a form top front fuselage added piece found necessary increase size effectiveness dethermalizer spin tab Earlier versions model did dethermalize consistently resulted loss model front area covered aluminum foil prevent DT fuse burning wood Add catapult hook dethermalizer spin tab wrap thread cover glue Glue small pieces sandpaper finger grip assist holding model during launch Finish The wing tail surfaces finished sanding sealer nitrate dope two coats sealer thinned 50% wing coat tail Apply two coats clear nitrate dope also thinned 50% entire model Always sand between coats 500-grit sandpaper simple finishing technique lightly spray entire model clear lacquer available department stores finish will tend somewhat heavier works well usually add color model lightly spraying tips surfaces orange fluorescent paint Dont add too much colorit will make model overweight Catapult catapult made 1/2 diameter dowel six inches long /4 deep slot cut top hold loop rubber Several knots keep rubber slipping through slot stretched nine-inch loop rubber maximum permitted too long people due arm length ability stretch rubber its maximum energy Tuning length rubber particularly important Juniors people dont have long arms Ive found 71/28 inches works best Tilting dowel forward about 200 during launch can gain stretch distance gives bit clearance Flying Test-fly calm airpreferably early morning evening thermal conditions minimal DT needed Balance model clay lead indicated point Test glide set rudder slight left turn should good starting point catapult launches Begin catapult launches roughly 800 launch angle slight bank right slightly less full pull Once model close final trim always launch full pull maintain consistent launch velocity Adjust incidence rudder obtain nearly straight-up climb /2 3/4 turn top glide can fine-tuned along way adding removing nose weight obtain gentle glide small amount washin may necessary keep model spiraling out thermal cut small tab left main panel deflect about 146 inch glue place Contests still-air capability model about 60-70 seconds thermals needed achieve max flights Flying right time becomes all-important factor contest flying great model poor air will often beaten not-sogreat model great air thermal-picking becomes necessity thermal cannot seen its effects can Experience perhaps best teacher Ill offer some things allow see thermals effects bubbles fluff streamers marker models temperature indicators timing interval between thermals butterflies flying 50 feet hawk gracefully circling overhead heat mirage horizon course just plain old intuition Thermals also tend come different varieties its necessary choose right type glider Dont fooled gas model thermaling hot 900 feet glider can reach 100 feet typical day low-altitude thermal activity best between about 11 am 230 pm its best plan flying during time Know glider know its quirks pulls out relation launch behaves both calm windy conditions centers lift best way find thermals know model course practice thats fun See flying field 4Tow Planes Scale Sailplanes Up Six Meters Available 1/375 Discus Krause ers 1/3 Salto Krause 1/375 ASW 27 Krause Sailpianes Unlimited Ltd 63 East 82nd St New York NY 10028 12-879-1634 212-535-5295 1/385 ASK 18 Roke 1/45 ASK 21 Roedel 1/3 DG 600 Ripo ELECFRONIC WASHOUT IMPROVES SAFETY MARGIN plane shows signs tipstalling inappropriate times 1OSX may have capability help plane uses seperate servos barn-door style outboard ailerons using special multi-point mix function included 1OSX two aileron servos can programmed raise slightly elevator travel increased Around neutral chance snapping remote ailerons remain normal commanded position Through experimentation will discover what point elevator travel ailerons should rise much example below shows set-up ailerons begin rise 50% up elevator stick rise about 3/8at full travel Using electronic washout lot convenient cutting wing create washout adding unsightly devices such stall strips Once properiy pro grammed might turn nasty plane favorites Give try. its easy JR 1ff August1995 49 NUMBER FOUR IN SERIES
Edition: Model Aviation - 1995/08
Page Numbers: 43, 44, 45, 47, 49
C10~settirug kina Catapult gliders have around awhile various forms includi0 pole-mounted catapult variety4 P110 became popular among several free flight clubs late 1970s mid-1980s Central Indiana Aeromodelers began promoting simple set rules hand-held catapults wasnt long before event gained popularity local regional meets became provisional AMA event 1993 1994 Catapult Glider became official AMA event gained further popularity especially Midwest event has brought old hand-launch glider HLG fliers out retirement can now fly again allows Juniors throw nearly hard adults rules simple contestant must launch model hand-held catapult consisting single loop er maximum length nine inches mounted dowel maximum length six inches keep event simple no limitations put glider except rigid-wing requirement prohibition autovariable-geometry surfaces weight no 15 ounces August 1995 43 4 0 Six flights scored maximum flight time max two minutes per flight flights scored regardless duration contestant scores three maxes series six flights proceeds flyoff flights flyoff flights proceed same two-minute max until max missed Again flights scored consistency becomes important way catapult glider achieve its highest potential trim nearly straight-up climbhence models name HLG fliers have long known technique since its nearly impossible throw HLG straight up enough incidence usually added permit somewhat shallow launch increased incidence also added consistency helped make launch less critical Because hand-held catapult glider can launched angle consistency model takes full advantage trim technique nearly straight-up Combined its simple construction light weight spin-tab dethermalizer DT Straight-Up makes very competitive model Try twothey fun CONSTRUCTION Attention detail difference between average glider great Adhesive Thick cyanoacrylate CyA glue works well though other types glue may substituted desired Wing Choose medium-weight 7-lb stock piece 1/ balsa preferably C-grain Cut planform shown carve sand airfoil being careful maintain high point indicated plan lar way fly event contests fly pen technique invented Steve Geraghty HLG US Free Flight Championships also uscd 1994 United States Outdoor Championships both HLG Catapult Glider [he pen designated flying site official flying must take place pen triangular area designated traffic cones f1gs spaced about 1X feet apart official flying must done pen Nothing no other fliers making official flights models permitted pen timers coaches spectators thermal-sensing devices chase bikes etc must located outside pen Thermal-sensing devices prohibited simply permitted pen fact having concentrated near pen often helps Iliers detect thermals otherwise might pass Having pen dim i sioned 100 feet also helps enforce AMA nile timer may move 200 feet timing flight result great fun official flying clone center stage manpower permits official scoreboard event can maintained pen eliminating dreaded walk officials table have score recorded after flight remark increased interest spectators did have chase around field looking flying particular event Its also great because everyone gets know another see others models learn others flying techniques best become friends often missed go off own corners field recent contest did use pen found out really missed flying good-natured huddle HLG fliers camping out different area flew hope future major contests will consider using pen both HLG Catapult Glider 44 Model Aviation -Size Plans page 45 100 FT Spin-tab dethermalizer pops open after fuse burns throughRear fuselage has sandpaper grips consistent accurate retaining rubber band spiraling model back groundlaunches Color rudder/tips added visibility Straight Up simple hand-held catapult glider designed drawn Joe Mekina September 1994 wing area sq projected stab area q weight ox 13 grams LLIZL ~~42 fl Good Luck taper tovard i9 WING 1/8 balsa high point .3lA 4 dihedral detail trim tab left wing bend down 1/16 AIRFOIL SECTIONS tip 111 CATAPULT 9 loop 1/4 rubber 6 dowel break root f- 3I16 10 snuffer tube ental rubber band1/4 x 1/8 balsa 3/16 diameter 07z thread wrap Fly close 00 right-left pattern STAB 1/32 balsa slight left stab tilt OT will spiral model out thermal 1-I Co C 0 0 FUSELAGE 114x118x17-114 sDruce lead clay wrap front aluminumRUDDER balance foil prevent burningDT flap left side cut aluminum pop can1/32 balsa curved outward glue rear prior thread wrap taper fuselage behind wing top sandpaper grips both sides wing should also taper toward tip Begin sanding 1 80-grit sandpaper 220 finish 400 After wing sanded shape cut dihedral breaks sand angles shown Glue dihedral joints set aside final assembly Fuselage Choose straight piece /s x spruce Mark wing stabilizer positions top bottom fuselage tapered behind wing top careful sand areas marked off wing stab help alignment process rear fuselage has small finger grip aid launching model Stabilizer Rudder Cut light 5-7 lb stock 1A2 balsa preferably C-grain Round edges thin toward tips maintaining symmetrical airfoil Again attention detail important Hook Bend piece 047 music wire shown plans hook must have smooth radius catapult can disengage freely Drill small hole fuselage anchor hook cut slot forward hole straight part hook lay glue hook place until final assembly Dethermalizer optional highly recommendedparticularly glider will flown contests object game fly glider thermals dethermalizer simple fuse-operated spin tab cut aluminum soft-drink can Cut tab scissors lay aside final assembly snuffer tube made 3A6 ID aluminum tubing Final Assembly Glue stab fuselage placing building surface shimming front fuselage scrap 1A2 balsa maintain near-zero incidence ION OWER LESS HASSLE USE Nil elize Davis Diesel Its Awesome 4 50% Power Same Easy Starting No Glow Plugs Runs llvice Long 4ornts Scale Sound DAVIS MODEL PRODUCTS P0 Box 141 DeptMAMilfordCT06460 2O3-877-..O complete inrmotion packet send $400 Icredit applied first orderl No Morn Sags Works WIth Iron-On Coverings No Need Use Any Prep Easy Use n1EWOODPRXFR will weaken integrIty structure Send Check/Money Order Directly UNIQUE MODEL PRODUCTS RO Boa 2229 Lake Arrowhead CA 92352-2229 FO lntotntatAn CAl 9091 390-SAS2 FA5 509 336-2715 August1995 47 THE WOODPECKER8 First Conve b e Mul Purpo e Co e ng Too NOW YOU CAN COVER LIKE THE PROS No Bubbles Covering Looks Great Long After Its Applied Film Over Film No Problem THE WCKDPKXFR easily converts allow apply trims choice See Hobby Dealer First zOnI$95 Visa & MIC AcceptedCA resid90A add 5775% sales las Made USAFor orders onlyAll Steel consoaclion1-800-336-5602 Tills aOl Sony No CODsDEALER INQUIRIES WELCOME Glue wing place placing blocks under wing half achieve slight left stab tilt left wing down careful keep piece scrap 1/32 under front fuselage during process Glue rudder being careful aligned straight possible Add piece /8 x a form top front fuselage added piece found necessary increase size effectiveness dethermalizer spin tab Earlier versions model did dethermalize consistently resulted loss model front area covered aluminum foil prevent DT fuse burning wood Add catapult hook dethermalizer spin tab wrap thread cover glue Glue small pieces sandpaper finger grip assist holding model during launch Finish The wing tail surfaces finished sanding sealer nitrate dope two coats sealer thinned 50% wing coat tail Apply two coats clear nitrate dope also thinned 50% entire model Always sand between coats 500-grit sandpaper simple finishing technique lightly spray entire model clear lacquer available department stores finish will tend somewhat heavier works well usually add color model lightly spraying tips surfaces orange fluorescent paint Dont add too much colorit will make model overweight Catapult catapult made 1/2 diameter dowel six inches long /4 deep slot cut top hold loop rubber Several knots keep rubber slipping through slot stretched nine-inch loop rubber maximum permitted too long people due arm length ability stretch rubber its maximum energy Tuning length rubber particularly important Juniors people dont have long arms Ive found 71/28 inches works best Tilting dowel forward about 200 during launch can gain stretch distance gives bit clearance Flying Test-fly calm airpreferably early morning evening thermal conditions minimal DT needed Balance model clay lead indicated point Test glide set rudder slight left turn should good starting point catapult launches Begin catapult launches roughly 800 launch angle slight bank right slightly less full pull Once model close final trim always launch full pull maintain consistent launch velocity Adjust incidence rudder obtain nearly straight-up climb /2 3/4 turn top glide can fine-tuned along way adding removing nose weight obtain gentle glide small amount washin may necessary keep model spiraling out thermal cut small tab left main panel deflect about 146 inch glue place Contests still-air capability model about 60-70 seconds thermals needed achieve max flights Flying right time becomes all-important factor contest flying great model poor air will often beaten not-sogreat model great air thermal-picking becomes necessity thermal cannot seen its effects can Experience perhaps best teacher Ill offer some things allow see thermals effects bubbles fluff streamers marker models temperature indicators timing interval between thermals butterflies flying 50 feet hawk gracefully circling overhead heat mirage horizon course just plain old intuition Thermals also tend come different varieties its necessary choose right type glider Dont fooled gas model thermaling hot 900 feet glider can reach 100 feet typical day low-altitude thermal activity best between about 11 am 230 pm its best plan flying during time Know glider know its quirks pulls out relation launch behaves both calm windy conditions centers lift best way find thermals know model course practice thats fun See flying field 4Tow Planes Scale Sailplanes Up Six Meters Available 1/375 Discus Krause ers 1/3 Salto Krause 1/375 ASW 27 Krause Sailpianes Unlimited Ltd 63 East 82nd St New York NY 10028 12-879-1634 212-535-5295 1/385 ASK 18 Roke 1/45 ASK 21 Roedel 1/3 DG 600 Ripo ELECFRONIC WASHOUT IMPROVES SAFETY MARGIN plane shows signs tipstalling inappropriate times 1OSX may have capability help plane uses seperate servos barn-door style outboard ailerons using special multi-point mix function included 1OSX two aileron servos can programmed raise slightly elevator travel increased Around neutral chance snapping remote ailerons remain normal commanded position Through experimentation will discover what point elevator travel ailerons should rise much example below shows set-up ailerons begin rise 50% up elevator stick rise about 3/8at full travel Using electronic washout lot convenient cutting wing create washout adding unsightly devices such stall strips Once properiy pro grammed might turn nasty plane favorites Give try. its easy JR 1ff August1995 49 NUMBER FOUR IN SERIES
Edition: Model Aviation - 1995/08
Page Numbers: 43, 44, 45, 47, 49
C10~settirug kina Catapult gliders have around awhile various forms includi0 pole-mounted catapult variety4 P110 became popular among several free flight clubs late 1970s mid-1980s Central Indiana Aeromodelers began promoting simple set rules hand-held catapults wasnt long before event gained popularity local regional meets became provisional AMA event 1993 1994 Catapult Glider became official AMA event gained further popularity especially Midwest event has brought old hand-launch glider HLG fliers out retirement can now fly again allows Juniors throw nearly hard adults rules simple contestant must launch model hand-held catapult consisting single loop er maximum length nine inches mounted dowel maximum length six inches keep event simple no limitations put glider except rigid-wing requirement prohibition autovariable-geometry surfaces weight no 15 ounces August 1995 43 4 0 Six flights scored maximum flight time max two minutes per flight flights scored regardless duration contestant scores three maxes series six flights proceeds flyoff flights flyoff flights proceed same two-minute max until max missed Again flights scored consistency becomes important way catapult glider achieve its highest potential trim nearly straight-up climbhence models name HLG fliers have long known technique since its nearly impossible throw HLG straight up enough incidence usually added permit somewhat shallow launch increased incidence also added consistency helped make launch less critical Because hand-held catapult glider can launched angle consistency model takes full advantage trim technique nearly straight-up Combined its simple construction light weight spin-tab dethermalizer DT Straight-Up makes very competitive model Try twothey fun CONSTRUCTION Attention detail difference between average glider great Adhesive Thick cyanoacrylate CyA glue works well though other types glue may substituted desired Wing Choose medium-weight 7-lb stock piece 1/ balsa preferably C-grain Cut planform shown carve sand airfoil being careful maintain high point indicated plan lar way fly event contests fly pen technique invented Steve Geraghty HLG US Free Flight Championships also uscd 1994 United States Outdoor Championships both HLG Catapult Glider [he pen designated flying site official flying must take place pen triangular area designated traffic cones f1gs spaced about 1X feet apart official flying must done pen Nothing no other fliers making official flights models permitted pen timers coaches spectators thermal-sensing devices chase bikes etc must located outside pen Thermal-sensing devices prohibited simply permitted pen fact having concentrated near pen often helps Iliers detect thermals otherwise might pass Having pen dim i sioned 100 feet also helps enforce AMA nile timer may move 200 feet timing flight result great fun official flying clone center stage manpower permits official scoreboard event can maintained pen eliminating dreaded walk officials table have score recorded after flight remark increased interest spectators did have chase around field looking flying particular event Its also great because everyone gets know another see others models learn others flying techniques best become friends often missed go off own corners field recent contest did use pen found out really missed flying good-natured huddle HLG fliers camping out different area flew hope future major contests will consider using pen both HLG Catapult Glider 44 Model Aviation -Size Plans page 45 100 FT Spin-tab dethermalizer pops open after fuse burns throughRear fuselage has sandpaper grips consistent accurate retaining rubber band spiraling model back groundlaunches Color rudder/tips added visibility Straight Up simple hand-held catapult glider designed drawn Joe Mekina September 1994 wing area sq projected stab area q weight ox 13 grams LLIZL ~~42 fl Good Luck taper tovard i9 WING 1/8 balsa high point .3lA 4 dihedral detail trim tab left wing bend down 1/16 AIRFOIL SECTIONS tip 111 CATAPULT 9 loop 1/4 rubber 6 dowel break root f- 3I16 10 snuffer tube ental rubber band1/4 x 1/8 balsa 3/16 diameter 07z thread wrap Fly close 00 right-left pattern STAB 1/32 balsa slight left stab tilt OT will spiral model out thermal 1-I Co C 0 0 FUSELAGE 114x118x17-114 sDruce lead clay wrap front aluminumRUDDER balance foil prevent burningDT flap left side cut aluminum pop can1/32 balsa curved outward glue rear prior thread wrap taper fuselage behind wing top sandpaper grips both sides wing should also taper toward tip Begin sanding 1 80-grit sandpaper 220 finish 400 After wing sanded shape cut dihedral breaks sand angles shown Glue dihedral joints set aside final assembly Fuselage Choose straight piece /s x spruce Mark wing stabilizer positions top bottom fuselage tapered behind wing top careful sand areas marked off wing stab help alignment process rear fuselage has small finger grip aid launching model Stabilizer Rudder Cut light 5-7 lb stock 1A2 balsa preferably C-grain Round edges thin toward tips maintaining symmetrical airfoil Again attention detail important Hook Bend piece 047 music wire shown plans hook must have smooth radius catapult can disengage freely Drill small hole fuselage anchor hook cut slot forward hole straight part hook lay glue hook place until final assembly Dethermalizer optional highly recommendedparticularly glider will flown contests object game fly glider thermals dethermalizer simple fuse-operated spin tab cut aluminum soft-drink can Cut tab scissors lay aside final assembly snuffer tube made 3A6 ID aluminum tubing Final Assembly Glue stab fuselage placing building surface shimming front fuselage scrap 1A2 balsa maintain near-zero incidence ION OWER LESS HASSLE USE Nil elize Davis Diesel Its Awesome 4 50% Power Same Easy Starting No Glow Plugs Runs llvice Long 4ornts Scale Sound DAVIS MODEL PRODUCTS P0 Box 141 DeptMAMilfordCT06460 2O3-877-..O complete inrmotion packet send $400 Icredit applied first orderl No Morn Sags Works WIth Iron-On Coverings No Need Use Any Prep Easy Use n1EWOODPRXFR will weaken integrIty structure Send Check/Money Order Directly UNIQUE MODEL PRODUCTS RO Boa 2229 Lake Arrowhead CA 92352-2229 FO lntotntatAn CAl 9091 390-SAS2 FA5 509 336-2715 August1995 47 THE WOODPECKER8 First Conve b e Mul Purpo e Co e ng Too NOW YOU CAN COVER LIKE THE PROS No Bubbles Covering Looks Great Long After Its Applied Film Over Film No Problem THE WCKDPKXFR easily converts allow apply trims choice See Hobby Dealer First zOnI$95 Visa & MIC AcceptedCA resid90A add 5775% sales las Made USAFor orders onlyAll Steel consoaclion1-800-336-5602 Tills aOl Sony No CODsDEALER INQUIRIES WELCOME Glue wing place placing blocks under wing half achieve slight left stab tilt left wing down careful keep piece scrap 1/32 under front fuselage during process Glue rudder being careful aligned straight possible Add piece /8 x a form top front fuselage added piece found necessary increase size effectiveness dethermalizer spin tab Earlier versions model did dethermalize consistently resulted loss model front area covered aluminum foil prevent DT fuse burning wood Add catapult hook dethermalizer spin tab wrap thread cover glue Glue small pieces sandpaper finger grip assist holding model during launch Finish The wing tail surfaces finished sanding sealer nitrate dope two coats sealer thinned 50% wing coat tail Apply two coats clear nitrate dope also thinned 50% entire model Always sand between coats 500-grit sandpaper simple finishing technique lightly spray entire model clear lacquer available department stores finish will tend somewhat heavier works well usually add color model lightly spraying tips surfaces orange fluorescent paint Dont add too much colorit will make model overweight Catapult catapult made 1/2 diameter dowel six inches long /4 deep slot cut top hold loop rubber Several knots keep rubber slipping through slot stretched nine-inch loop rubber maximum permitted too long people due arm length ability stretch rubber its maximum energy Tuning length rubber particularly important Juniors people dont have long arms Ive found 71/28 inches works best Tilting dowel forward about 200 during launch can gain stretch distance gives bit clearance Flying Test-fly calm airpreferably early morning evening thermal conditions minimal DT needed Balance model clay lead indicated point Test glide set rudder slight left turn should good starting point catapult launches Begin catapult launches roughly 800 launch angle slight bank right slightly less full pull Once model close final trim always launch full pull maintain consistent launch velocity Adjust incidence rudder obtain nearly straight-up climb /2 3/4 turn top glide can fine-tuned along way adding removing nose weight obtain gentle glide small amount washin may necessary keep model spiraling out thermal cut small tab left main panel deflect about 146 inch glue place Contests still-air capability model about 60-70 seconds thermals needed achieve max flights Flying right time becomes all-important factor contest flying great model poor air will often beaten not-sogreat model great air thermal-picking becomes necessity thermal cannot seen its effects can Experience perhaps best teacher Ill offer some things allow see thermals effects bubbles fluff streamers marker models temperature indicators timing interval between thermals butterflies flying 50 feet hawk gracefully circling overhead heat mirage horizon course just plain old intuition Thermals also tend come different varieties its necessary choose right type glider Dont fooled gas model thermaling hot 900 feet glider can reach 100 feet typical day low-altitude thermal activity best between about 11 am 230 pm its best plan flying during time Know glider know its quirks pulls out relation launch behaves both calm windy conditions centers lift best way find thermals know model course practice thats fun See flying field 4Tow Planes Scale Sailplanes Up Six Meters Available 1/375 Discus Krause ers 1/3 Salto Krause 1/375 ASW 27 Krause Sailpianes Unlimited Ltd 63 East 82nd St New York NY 10028 12-879-1634 212-535-5295 1/385 ASK 18 Roke 1/45 ASK 21 Roedel 1/3 DG 600 Ripo ELECFRONIC WASHOUT IMPROVES SAFETY MARGIN plane shows signs tipstalling inappropriate times 1OSX may have capability help plane uses seperate servos barn-door style outboard ailerons using special multi-point mix function included 1OSX two aileron servos can programmed raise slightly elevator travel increased Around neutral chance snapping remote ailerons remain normal commanded position Through experimentation will discover what point elevator travel ailerons should rise much example below shows set-up ailerons begin rise 50% up elevator stick rise about 3/8at full travel Using electronic washout lot convenient cutting wing create washout adding unsightly devices such stall strips Once properiy pro grammed might turn nasty plane favorites Give try. its easy JR 1ff August1995 49 NUMBER FOUR IN SERIES