A meticulous needling job mandatory days Cat II engine runs Free Spirit also has winner C mild engines IN THE SUMMER 1969 try ing get back competition flying trimming Sunday afternoon old Mesquite Hobby Park home lot southwestern contests ran gym-short clad character flying incredibly fast ship Noticing multitude expertise necessary sport introduced myself re cycled free-fighter started asking lot everyday questions like what good filled few salient details engine modification structure design promptly jogged off field muttering something un intelligible about beginners questions As find out later little /2A ship predecessor Free Spirit several other successful airplanes taken share hardware era 70 73 However probably people have fortunate enough get set plans ship Homer Smith state Washington Jack McDonald Dallas Texas Free Spirit synonymous atti tude designer/builder air plane flies exceptionally well consistency unexcelled famous old designs As repeat success demands competitive designs invariably fall couple categories either highthrust low-thrust designs sharing common polyhedral wing configurations pylon coupled relatively common stab-rudder assembly such underslung and/or aft lower/uppermounted fin Free Spirit encompasses desirable features true pylon competition air craft embodies few undesirable char acteristics B Free Spirit showed lot peo ple way wins 70-72 Recog nition article form has slow coming because Casey wanted totally reliable contest proven airship surprises ironed out plus construction techniques honed best combination possible records probably exemplify tributes better can 1st B Tulsa Glue Dobbers Spring Rally 70 1st C 70 Southwesterns 2nd B same contest 1st B Spring Abilene Contest 19702nd Longview 71 3rd Tulsa 72 B just name few victories 24th Annual Tulsa Glue Dobbers contest 74 Free Spirit aced out everyone B gas win against Mike Hallums Star Seeker nine straight maxes Cat Closeup showing two-line removable pres sure tank spinner handy electric start ingconvenient flood-off systems fast climbing A-B Free Flight competition aircraft outstanding consistent performance Design Casey Hornbeck Text plans Duke Horn August1976 39 Free Spirit II time 2700 Nuf said big secret Free Spirit fact terribly fast partially owing 9% airfoil probably Hornbeck ST 23 howling out 19000 front end free-flight games days 80% winning factor comes short fast can close distance point point B fringe benefit ship gives good glide youve seen Natu rally combination look seldom get see much hoped ship does achieve elu sive compromise aid auto surfaces needless say does better auto surfaces Since first article about Hornbeck design capsulized introduction would order Casey has ac tive modeler since 39 joined AMA NFFS same time has won CMC honorable mention certificates last 10 months own airplanes Fuselage Look front end first See nice old-fashioned round nose gluing four sides some ngular stock against sides original A-B Free Spirit has smaller diameter front accommodate Tatone aluminum mount wanted show also cheek construction would look utilizing 29-35 Tatone mount since could fly inC mild 29-35 firewall 1/16 sheet ply laminate 3 pieces should vary diameter ac commodate flush-fitting motor mount choice Since hot 19 23 recom mended airplane will neces sary slightly taper sides meet smaller diameter So make firewall first Laminate 1/16 music wire skid put blind mounting nuts back match mount Cut out two fuselage sides 1/16 sheet C-grain balsa pin over plan glue i/i sq spruce longerons down also Let dry Aliphatic resin glue recommended Install doublers gussets next Repeat left side next being careful build two right sides Youve never done have Cut formers t except #1 1/16 sheet plywood Take dimensions former stations plan Glue formers 1 thru 4 down side pinned plan making sure 900 angles table let dry thor oughly Now glue left side four formers making sure square let dry completely Next V-notch longerons inside fuselage enough make crack neces sary angle tapering pull fuse lage rear-ends together symmetrical taper Now epoxy cracks together also tail-end same time After curing install rest formers Now make front end described earlier glue firewall square front Sheet top bottom start sanding Build fin put stab platform put after semi-round edge has obtained fuselage edges pylon built-up structure com pletely separate fuselage because find ideal method adjusting 1 l i V I N OI K -- -v CG later merely shifting pylon fore aft correct balance before epoxy ing down pylon airfoil section built up exactly shown plan Notice ribs notched pylon frame 1/16 sheeting runs 450 angleto itself therear pylon Make sheeting match undercamber 1 K I0 00 1 \ 1 dl 0 7I 2 00 II LLl 00 Li BI 40 Model Aviation L 0 / _ [ __ _ _ [ __ __ __ 010 wing mount epoxy mount scrap center also should fit bottom center mount Trim sand everything after drying Finish up fuselage adding DT snuffer line guide necessary gokks Now give fuselage pylon two coats dope sand ing between cover entire fuselage pylon fin either silk tissue might want use fiberglass cloth resin around front-end maxi mum strength Also point cut out holes timer removable gas tank make 1/16 sheet plywood screw facing timer epoxy position After covering give parts two three coats thin dope sanding lightly #150 wet/dry sandpaper Finish off two coats Hobbypoxy clear/color trim taste Wing Cut out 32 1/16 medium ribs shown plan start assembly pin ning down TE LE plan except blocking-up IE 1/20 proper air foil wait glue dry remove After glue joints have set sand appropriate dihedral breaks shown assemble wing correct dihedral spars hard grain balsa spars shown respective shimming angles in center panel desired right groove spiral After framework completed cover tissue trim taste Please use semi-vortex tips will find difficult build help psychological competitive edge Stabilizer Cut out necessary ribs notch spars paying careful attention uniformity sanding should have displayed rest airplane Pin down leading edge trailing edge wax-covered plan assemble con ventional manner Cover per rest air plane Trimming Flying Balance air plane CG location shown hand glide tall grass calm day Check gentle level glide-out approaching verge stall Correct stall dive tendencies shims under stab stab tilt will help diminish stall ing characteristics dont put too much youll dork Dont worry about perfect glide time Refine after power pattern has established Free Spirit should fly off board lot preadjustments However safe let engine rev cold fuel capability launch 450 right-oriented bank 5-6 second engine run airplane tries initiate anything other tight vertical halfright turn flat top out right turn glide adjustments necessary model should make steep 850 angle right spiral climb stop nose-face wind commencing right flat glide Adjust right power pattern rudder tab glide specified stab tilt airplane constructed follows building specifica tions minor adjustments rudder engine and/or stab should necessary August 1976 41 Above The music wire ~peg Iegs beneath nose intended save todays expensiveThe fuselage fairs precisely Tatone enpropellers during landinggine mount Secret ships performance very fast power flight good glide Left When comes planformsthat wing stabilizer outlinesfree fighters have manner theories case raked tips Below semi-vortex tips author says least add psychological competitive sense
Edition: Model Aviation - 1976/08
Page Numbers: 39, 40, 41
A meticulous needling job mandatory days Cat II engine runs Free Spirit also has winner C mild engines IN THE SUMMER 1969 try ing get back competition flying trimming Sunday afternoon old Mesquite Hobby Park home lot southwestern contests ran gym-short clad character flying incredibly fast ship Noticing multitude expertise necessary sport introduced myself re cycled free-fighter started asking lot everyday questions like what good filled few salient details engine modification structure design promptly jogged off field muttering something un intelligible about beginners questions As find out later little /2A ship predecessor Free Spirit several other successful airplanes taken share hardware era 70 73 However probably people have fortunate enough get set plans ship Homer Smith state Washington Jack McDonald Dallas Texas Free Spirit synonymous atti tude designer/builder air plane flies exceptionally well consistency unexcelled famous old designs As repeat success demands competitive designs invariably fall couple categories either highthrust low-thrust designs sharing common polyhedral wing configurations pylon coupled relatively common stab-rudder assembly such underslung and/or aft lower/uppermounted fin Free Spirit encompasses desirable features true pylon competition air craft embodies few undesirable char acteristics B Free Spirit showed lot peo ple way wins 70-72 Recog nition article form has slow coming because Casey wanted totally reliable contest proven airship surprises ironed out plus construction techniques honed best combination possible records probably exemplify tributes better can 1st B Tulsa Glue Dobbers Spring Rally 70 1st C 70 Southwesterns 2nd B same contest 1st B Spring Abilene Contest 19702nd Longview 71 3rd Tulsa 72 B just name few victories 24th Annual Tulsa Glue Dobbers contest 74 Free Spirit aced out everyone B gas win against Mike Hallums Star Seeker nine straight maxes Cat Closeup showing two-line removable pres sure tank spinner handy electric start ingconvenient flood-off systems fast climbing A-B Free Flight competition aircraft outstanding consistent performance Design Casey Hornbeck Text plans Duke Horn August1976 39 Free Spirit II time 2700 Nuf said big secret Free Spirit fact terribly fast partially owing 9% airfoil probably Hornbeck ST 23 howling out 19000 front end free-flight games days 80% winning factor comes short fast can close distance point point B fringe benefit ship gives good glide youve seen Natu rally combination look seldom get see much hoped ship does achieve elu sive compromise aid auto surfaces needless say does better auto surfaces Since first article about Hornbeck design capsulized introduction would order Casey has ac tive modeler since 39 joined AMA NFFS same time has won CMC honorable mention certificates last 10 months own airplanes Fuselage Look front end first See nice old-fashioned round nose gluing four sides some ngular stock against sides original A-B Free Spirit has smaller diameter front accommodate Tatone aluminum mount wanted show also cheek construction would look utilizing 29-35 Tatone mount since could fly inC mild 29-35 firewall 1/16 sheet ply laminate 3 pieces should vary diameter ac commodate flush-fitting motor mount choice Since hot 19 23 recom mended airplane will neces sary slightly taper sides meet smaller diameter So make firewall first Laminate 1/16 music wire skid put blind mounting nuts back match mount Cut out two fuselage sides 1/16 sheet C-grain balsa pin over plan glue i/i sq spruce longerons down also Let dry Aliphatic resin glue recommended Install doublers gussets next Repeat left side next being careful build two right sides Youve never done have Cut formers t except #1 1/16 sheet plywood Take dimensions former stations plan Glue formers 1 thru 4 down side pinned plan making sure 900 angles table let dry thor oughly Now glue left side four formers making sure square let dry completely Next V-notch longerons inside fuselage enough make crack neces sary angle tapering pull fuse lage rear-ends together symmetrical taper Now epoxy cracks together also tail-end same time After curing install rest formers Now make front end described earlier glue firewall square front Sheet top bottom start sanding Build fin put stab platform put after semi-round edge has obtained fuselage edges pylon built-up structure com pletely separate fuselage because find ideal method adjusting 1 l i V I N OI K -- -v CG later merely shifting pylon fore aft correct balance before epoxy ing down pylon airfoil section built up exactly shown plan Notice ribs notched pylon frame 1/16 sheeting runs 450 angleto itself therear pylon Make sheeting match undercamber 1 K I0 00 1 \ 1 dl 0 7I 2 00 II LLl 00 Li BI 40 Model Aviation L 0 / _ [ __ _ _ [ __ __ __ 010 wing mount epoxy mount scrap center also should fit bottom center mount Trim sand everything after drying Finish up fuselage adding DT snuffer line guide necessary gokks Now give fuselage pylon two coats dope sand ing between cover entire fuselage pylon fin either silk tissue might want use fiberglass cloth resin around front-end maxi mum strength Also point cut out holes timer removable gas tank make 1/16 sheet plywood screw facing timer epoxy position After covering give parts two three coats thin dope sanding lightly #150 wet/dry sandpaper Finish off two coats Hobbypoxy clear/color trim taste Wing Cut out 32 1/16 medium ribs shown plan start assembly pin ning down TE LE plan except blocking-up IE 1/20 proper air foil wait glue dry remove After glue joints have set sand appropriate dihedral breaks shown assemble wing correct dihedral spars hard grain balsa spars shown respective shimming angles in center panel desired right groove spiral After framework completed cover tissue trim taste Please use semi-vortex tips will find difficult build help psychological competitive edge Stabilizer Cut out necessary ribs notch spars paying careful attention uniformity sanding should have displayed rest airplane Pin down leading edge trailing edge wax-covered plan assemble con ventional manner Cover per rest air plane Trimming Flying Balance air plane CG location shown hand glide tall grass calm day Check gentle level glide-out approaching verge stall Correct stall dive tendencies shims under stab stab tilt will help diminish stall ing characteristics dont put too much youll dork Dont worry about perfect glide time Refine after power pattern has established Free Spirit should fly off board lot preadjustments However safe let engine rev cold fuel capability launch 450 right-oriented bank 5-6 second engine run airplane tries initiate anything other tight vertical halfright turn flat top out right turn glide adjustments necessary model should make steep 850 angle right spiral climb stop nose-face wind commencing right flat glide Adjust right power pattern rudder tab glide specified stab tilt airplane constructed follows building specifica tions minor adjustments rudder engine and/or stab should necessary August 1976 41 Above The music wire ~peg Iegs beneath nose intended save todays expensiveThe fuselage fairs precisely Tatone enpropellers during landinggine mount Secret ships performance very fast power flight good glide Left When comes planformsthat wing stabilizer outlinesfree fighters have manner theories case raked tips Below semi-vortex tips author says least add psychological competitive sense
Edition: Model Aviation - 1976/08
Page Numbers: 39, 40, 41
A meticulous needling job mandatory days Cat II engine runs Free Spirit also has winner C mild engines IN THE SUMMER 1969 try ing get back competition flying trimming Sunday afternoon old Mesquite Hobby Park home lot southwestern contests ran gym-short clad character flying incredibly fast ship Noticing multitude expertise necessary sport introduced myself re cycled free-fighter started asking lot everyday questions like what good filled few salient details engine modification structure design promptly jogged off field muttering something un intelligible about beginners questions As find out later little /2A ship predecessor Free Spirit several other successful airplanes taken share hardware era 70 73 However probably people have fortunate enough get set plans ship Homer Smith state Washington Jack McDonald Dallas Texas Free Spirit synonymous atti tude designer/builder air plane flies exceptionally well consistency unexcelled famous old designs As repeat success demands competitive designs invariably fall couple categories either highthrust low-thrust designs sharing common polyhedral wing configurations pylon coupled relatively common stab-rudder assembly such underslung and/or aft lower/uppermounted fin Free Spirit encompasses desirable features true pylon competition air craft embodies few undesirable char acteristics B Free Spirit showed lot peo ple way wins 70-72 Recog nition article form has slow coming because Casey wanted totally reliable contest proven airship surprises ironed out plus construction techniques honed best combination possible records probably exemplify tributes better can 1st B Tulsa Glue Dobbers Spring Rally 70 1st C 70 Southwesterns 2nd B same contest 1st B Spring Abilene Contest 19702nd Longview 71 3rd Tulsa 72 B just name few victories 24th Annual Tulsa Glue Dobbers contest 74 Free Spirit aced out everyone B gas win against Mike Hallums Star Seeker nine straight maxes Cat Closeup showing two-line removable pres sure tank spinner handy electric start ingconvenient flood-off systems fast climbing A-B Free Flight competition aircraft outstanding consistent performance Design Casey Hornbeck Text plans Duke Horn August1976 39 Free Spirit II time 2700 Nuf said big secret Free Spirit fact terribly fast partially owing 9% airfoil probably Hornbeck ST 23 howling out 19000 front end free-flight games days 80% winning factor comes short fast can close distance point point B fringe benefit ship gives good glide youve seen Natu rally combination look seldom get see much hoped ship does achieve elu sive compromise aid auto surfaces needless say does better auto surfaces Since first article about Hornbeck design capsulized introduction would order Casey has ac tive modeler since 39 joined AMA NFFS same time has won CMC honorable mention certificates last 10 months own airplanes Fuselage Look front end first See nice old-fashioned round nose gluing four sides some ngular stock against sides original A-B Free Spirit has smaller diameter front accommodate Tatone aluminum mount wanted show also cheek construction would look utilizing 29-35 Tatone mount since could fly inC mild 29-35 firewall 1/16 sheet ply laminate 3 pieces should vary diameter ac commodate flush-fitting motor mount choice Since hot 19 23 recom mended airplane will neces sary slightly taper sides meet smaller diameter So make firewall first Laminate 1/16 music wire skid put blind mounting nuts back match mount Cut out two fuselage sides 1/16 sheet C-grain balsa pin over plan glue i/i sq spruce longerons down also Let dry Aliphatic resin glue recommended Install doublers gussets next Repeat left side next being careful build two right sides Youve never done have Cut formers t except #1 1/16 sheet plywood Take dimensions former stations plan Glue formers 1 thru 4 down side pinned plan making sure 900 angles table let dry thor oughly Now glue left side four formers making sure square let dry completely Next V-notch longerons inside fuselage enough make crack neces sary angle tapering pull fuse lage rear-ends together symmetrical taper Now epoxy cracks together also tail-end same time After curing install rest formers Now make front end described earlier glue firewall square front Sheet top bottom start sanding Build fin put stab platform put after semi-round edge has obtained fuselage edges pylon built-up structure com pletely separate fuselage because find ideal method adjusting 1 l i V I N OI K -- -v CG later merely shifting pylon fore aft correct balance before epoxy ing down pylon airfoil section built up exactly shown plan Notice ribs notched pylon frame 1/16 sheeting runs 450 angleto itself therear pylon Make sheeting match undercamber 1 K I0 00 1 \ 1 dl 0 7I 2 00 II LLl 00 Li BI 40 Model Aviation L 0 / _ [ __ _ _ [ __ __ __ 010 wing mount epoxy mount scrap center also should fit bottom center mount Trim sand everything after drying Finish up fuselage adding DT snuffer line guide necessary gokks Now give fuselage pylon two coats dope sand ing between cover entire fuselage pylon fin either silk tissue might want use fiberglass cloth resin around front-end maxi mum strength Also point cut out holes timer removable gas tank make 1/16 sheet plywood screw facing timer epoxy position After covering give parts two three coats thin dope sanding lightly #150 wet/dry sandpaper Finish off two coats Hobbypoxy clear/color trim taste Wing Cut out 32 1/16 medium ribs shown plan start assembly pin ning down TE LE plan except blocking-up IE 1/20 proper air foil wait glue dry remove After glue joints have set sand appropriate dihedral breaks shown assemble wing correct dihedral spars hard grain balsa spars shown respective shimming angles in center panel desired right groove spiral After framework completed cover tissue trim taste Please use semi-vortex tips will find difficult build help psychological competitive edge Stabilizer Cut out necessary ribs notch spars paying careful attention uniformity sanding should have displayed rest airplane Pin down leading edge trailing edge wax-covered plan assemble con ventional manner Cover per rest air plane Trimming Flying Balance air plane CG location shown hand glide tall grass calm day Check gentle level glide-out approaching verge stall Correct stall dive tendencies shims under stab stab tilt will help diminish stall ing characteristics dont put too much youll dork Dont worry about perfect glide time Refine after power pattern has established Free Spirit should fly off board lot preadjustments However safe let engine rev cold fuel capability launch 450 right-oriented bank 5-6 second engine run airplane tries initiate anything other tight vertical halfright turn flat top out right turn glide adjustments necessary model should make steep 850 angle right spiral climb stop nose-face wind commencing right flat glide Adjust right power pattern rudder tab glide specified stab tilt airplane constructed follows building specifica tions minor adjustments rudder engine and/or stab should necessary August 1976 41 Above The music wire ~peg Iegs beneath nose intended save todays expensiveThe fuselage fairs precisely Tatone enpropellers during landinggine mount Secret ships performance very fast power flight good glide Left When comes planformsthat wing stabilizer outlinesfree fighters have manner theories case raked tips Below semi-vortex tips author says least add psychological competitive sense