This Half-A has pedigree will satisfy discriminating free/fighter Design Jim Clem Text Photos Larry Kruse JUST AS SURELY names like Cita tion Whirlaway Bold Ruler Foolish Pleasure conjure up glimpses power motion minds horse race fans names like Witch Doctor Scrambler Fire Wagon Okie Bird set free visions swiftness grace minds free fighters Make no mistake about blood lines tell sort competition Jim Clems newest Country Boy latest proven blood line marked contest wins way small est local meet consecutive placings Nationals over ten-year period CB timely ab breviation began curiously enough successor currently popular Okie Bird series favor friend Bob Frazier instrumental development original Witch Doctor 800 inactive mod eler several years early 1976 de cided get back competition trail Jim responded Country Boy first version less re fined version Fire Wagon rudder placed atop stabilizer conferring Jim about design Bob liked everything about except rudder location difficult keep trim two friends sat down drawing board Jim drew Bob provided counsel present configura tion its aft rudder end product overall parameters ship within what Jim has come consider over wyy number years ideal compromise /2A relatively high aspect ratio 75 1 good gliding airfoil Lucky Lindy 275 sq wing area plane small enough climb swiftly yet glide well weighing 7 oz light er built judiciously Country Boy anything up start contest circuit first CB built April 76 has widely tested refined regionally since Ed Cadwell Bob Frazier Houston Bill Jenkins Memphis Jim OReilly John Epley Wichita boasts albeit modestly time first place wins both Fall Freeflight Bash Houston first Tulsa Glue Dobbers Freeflight Fling first Wichihawks Annual Fall Rally fifth 76 Nationals Springfield despite five second engine run fourth flight Future winning potential comes built-in part Country Boys plans Construction Although cut paste instructions arent necessary building CB some commentary specific areas might help wing built flat board conventional fashion however right wing main panel should have 1/s~ wash-in built LE blocked up /8 higher TE polyhedral break well frame wing LE TE ribs omitting spars ribs center dihedral break until after wing panels assembled proper dihedral polyhedral angles procedure makes particularly im portant no twist built wing easy thing top bot tom spars added short pin down panel spars installed sup porting other panels blocking up appropriately prevent over-stressing previously formed joints Gussets 1/16 sheet webbing optional complete basic framework stabilizer construction differs wing bottom spar March 1977 25 Jim CB experts fly de signs tribute reputation years standing CB big 76 winner NO OCR TEXT Country Boy placed plan along leading trailing edges ribs top spars sheeted portion front center can now set together sheeting providing necessary strength D-T hooks remaining construction detailed plans fuselage likewise presents no sur prises except basic framework /s X i/s longerons vertical members 1/8 sq strips pylon area /s X 5/32 strips rudder area sembled complete pylon rudder course directly plan sans sheet fuselage sides moment Pay particular attention perfectly align ing rudder pylon during basic framing process Any misalignment will show up quickly youd amazed quickly later flight testing fuselage framework dry remove plans use template trace 1/16 sheet sides Use Tite Bond some other aliphatic resin glue cement both sides place same time weight down til theyre dry firewall depending motor mount chosen nose blocks can epoxied place extremely impor tant get firewall set correct left downthrust angles tip might useful would make tem plates correct thrust angles 1/32 plywood carefully sand angles front fuselage before epoxying firewall place feel confident simply laying fuselage over plan get correct angles thats fine youll put lot work CB see screw itself ground thrust angles arent accu rate entire ship fuselage included can sanded doped covered Japa nese tissue favorite covering ma terial new slant might terest finish used Jim origi nal Country Boy ship covered aforementioned Japanese tissue water-shrunk given three coats clear nitrate dope nitrate dope covered coat clear epoxy paint fuel proofing After entire contest season high-nitro fuels plane shows no fuel soaking has picked up no weight fuel residues penetrating finish finish simple painless effective weight penalty pay Flight Trimming Before flying check airplane care fully unwanted warps flying sur faces should flat exception right wing should have /s washin Check balance point should CG location shown plan necessary use lead correct im balance Make sure model has left Right Tatone TickOff Half-A timer pinches off fuel line pacifier tank held U-shape wire holder Engine has left thrust engine thrust shown plan Pick time winds calm hand glide plane several times should have long flat glide gentle right turn Stabilizer tilt used turn right tip high looking rear stalling diving occurs CG correct add remove incidence rear stabilizer accordingly glide looks pretty good have plenty courage its time first power run can make fi nal glide adjustments after few power flights first flight should have pow er run two three seconds prop forwards engine running top speed Launch ship steep angle 75 800 slightly right wind should go slightly right keep its March 1977 27 Nose up engine running Jim tops off fuel ship picture does have pacifier tank shown plan Below Principal difference between CB earlier Firewagon series aft vertical tail replaces previous bottom location right dihedral break i/B washin nose up Watch looping tendency zeroing out Either prob lems can corrected removing add ing balsa 1/32 increments 1/16 incidence block under trailing edge stab Country Boy should climb steeply right make half turns nine seconds Transition power glide should smooth loss altitude transition should good 45-second run longer run Trimming problems often arise flying new airplane first time model fly off board built-in adjustments must right proportion another outset likely will happen will some adjustments necessary before ship flying its full potential Know ing precisely what adjustments make solve particular power problem can sometimes challenge help deal some situations listed below power problems adjustments necessary correct Much information has covered before other construction articles relating flying trimming low thrust designs may serve welcome review Problem Under full power airplane begins climbing steeply right As speed builds up right wing drops ship levels out Solution This caused com bination following enough left engine thrust enough wash-in right main wing panel too much right rud der too much incidence Keep latter very much mind built leftthrust shown plan have right amount wash-in called remove 1/32 incidence block under rear stab will probably cure problem However may have add small amount weight tail com pensate glide So effect what has happened CG has moved aft get desired climb Too far aft however ship will level out dive An other point remember remove balsa under rear stab removes some right turn Conversely add incidence right turn increased Problem The airplane leaves hand full power within few seconds right wing comes up plane rolls left Solution This caused too much washin right wing panel Excessive left engine thrust left rudder can add problem Make adjustment time however Remove excessive wash-in try again does work try removing some left engine thrust still has left tendency try right rudder tab 1/64 increments accurate rudder tab adjustments use strips balsa taper trailing edge shape Usually strip /4 wide 5/t~ long will suffice Glue strip right side rud der wide edge flush rear rudder Remember too rudder tab adjustments will affect turn under power climb angle well right rudder added climb angle will decrease conversely right rudder decreased climb angle will increase Problem Under full power ship dips right before assuming its correct power pattern Solution Additional left-thrust will elimi nate problem Once trimming com plete other ingredient re quires particular attention practice like way CB flies practice until feel confident its performance confident own pre-flight routine combination well-tuned airplane practiced flier will serve enhance winning tradition Country Boy 28 Model Aviation Another way go metal Tatone tank mount shown Snuffer tube fuse Country Boy show clearly Final wing has multi spars Well caption info indicates Jim hold ing both versions Country Boy taken during test session job right has bottom fin multi-spar wing left has simpler structure
Edition: Model Aviation - 1977/03
Page Numbers: 25, 26, 27, 28
This Half-A has pedigree will satisfy discriminating free/fighter Design Jim Clem Text Photos Larry Kruse JUST AS SURELY names like Cita tion Whirlaway Bold Ruler Foolish Pleasure conjure up glimpses power motion minds horse race fans names like Witch Doctor Scrambler Fire Wagon Okie Bird set free visions swiftness grace minds free fighters Make no mistake about blood lines tell sort competition Jim Clems newest Country Boy latest proven blood line marked contest wins way small est local meet consecutive placings Nationals over ten-year period CB timely ab breviation began curiously enough successor currently popular Okie Bird series favor friend Bob Frazier instrumental development original Witch Doctor 800 inactive mod eler several years early 1976 de cided get back competition trail Jim responded Country Boy first version less re fined version Fire Wagon rudder placed atop stabilizer conferring Jim about design Bob liked everything about except rudder location difficult keep trim two friends sat down drawing board Jim drew Bob provided counsel present configura tion its aft rudder end product overall parameters ship within what Jim has come consider over wyy number years ideal compromise /2A relatively high aspect ratio 75 1 good gliding airfoil Lucky Lindy 275 sq wing area plane small enough climb swiftly yet glide well weighing 7 oz light er built judiciously Country Boy anything up start contest circuit first CB built April 76 has widely tested refined regionally since Ed Cadwell Bob Frazier Houston Bill Jenkins Memphis Jim OReilly John Epley Wichita boasts albeit modestly time first place wins both Fall Freeflight Bash Houston first Tulsa Glue Dobbers Freeflight Fling first Wichihawks Annual Fall Rally fifth 76 Nationals Springfield despite five second engine run fourth flight Future winning potential comes built-in part Country Boys plans Construction Although cut paste instructions arent necessary building CB some commentary specific areas might help wing built flat board conventional fashion however right wing main panel should have 1/s~ wash-in built LE blocked up /8 higher TE polyhedral break well frame wing LE TE ribs omitting spars ribs center dihedral break until after wing panels assembled proper dihedral polyhedral angles procedure makes particularly im portant no twist built wing easy thing top bot tom spars added short pin down panel spars installed sup porting other panels blocking up appropriately prevent over-stressing previously formed joints Gussets 1/16 sheet webbing optional complete basic framework stabilizer construction differs wing bottom spar March 1977 25 Jim CB experts fly de signs tribute reputation years standing CB big 76 winner NO OCR TEXT Country Boy placed plan along leading trailing edges ribs top spars sheeted portion front center can now set together sheeting providing necessary strength D-T hooks remaining construction detailed plans fuselage likewise presents no sur prises except basic framework /s X i/s longerons vertical members 1/8 sq strips pylon area /s X 5/32 strips rudder area sembled complete pylon rudder course directly plan sans sheet fuselage sides moment Pay particular attention perfectly align ing rudder pylon during basic framing process Any misalignment will show up quickly youd amazed quickly later flight testing fuselage framework dry remove plans use template trace 1/16 sheet sides Use Tite Bond some other aliphatic resin glue cement both sides place same time weight down til theyre dry firewall depending motor mount chosen nose blocks can epoxied place extremely impor tant get firewall set correct left downthrust angles tip might useful would make tem plates correct thrust angles 1/32 plywood carefully sand angles front fuselage before epoxying firewall place feel confident simply laying fuselage over plan get correct angles thats fine youll put lot work CB see screw itself ground thrust angles arent accu rate entire ship fuselage included can sanded doped covered Japa nese tissue favorite covering ma terial new slant might terest finish used Jim origi nal Country Boy ship covered aforementioned Japanese tissue water-shrunk given three coats clear nitrate dope nitrate dope covered coat clear epoxy paint fuel proofing After entire contest season high-nitro fuels plane shows no fuel soaking has picked up no weight fuel residues penetrating finish finish simple painless effective weight penalty pay Flight Trimming Before flying check airplane care fully unwanted warps flying sur faces should flat exception right wing should have /s washin Check balance point should CG location shown plan necessary use lead correct im balance Make sure model has left Right Tatone TickOff Half-A timer pinches off fuel line pacifier tank held U-shape wire holder Engine has left thrust engine thrust shown plan Pick time winds calm hand glide plane several times should have long flat glide gentle right turn Stabilizer tilt used turn right tip high looking rear stalling diving occurs CG correct add remove incidence rear stabilizer accordingly glide looks pretty good have plenty courage its time first power run can make fi nal glide adjustments after few power flights first flight should have pow er run two three seconds prop forwards engine running top speed Launch ship steep angle 75 800 slightly right wind should go slightly right keep its March 1977 27 Nose up engine running Jim tops off fuel ship picture does have pacifier tank shown plan Below Principal difference between CB earlier Firewagon series aft vertical tail replaces previous bottom location right dihedral break i/B washin nose up Watch looping tendency zeroing out Either prob lems can corrected removing add ing balsa 1/32 increments 1/16 incidence block under trailing edge stab Country Boy should climb steeply right make half turns nine seconds Transition power glide should smooth loss altitude transition should good 45-second run longer run Trimming problems often arise flying new airplane first time model fly off board built-in adjustments must right proportion another outset likely will happen will some adjustments necessary before ship flying its full potential Know ing precisely what adjustments make solve particular power problem can sometimes challenge help deal some situations listed below power problems adjustments necessary correct Much information has covered before other construction articles relating flying trimming low thrust designs may serve welcome review Problem Under full power airplane begins climbing steeply right As speed builds up right wing drops ship levels out Solution This caused com bination following enough left engine thrust enough wash-in right main wing panel too much right rud der too much incidence Keep latter very much mind built leftthrust shown plan have right amount wash-in called remove 1/32 incidence block under rear stab will probably cure problem However may have add small amount weight tail com pensate glide So effect what has happened CG has moved aft get desired climb Too far aft however ship will level out dive An other point remember remove balsa under rear stab removes some right turn Conversely add incidence right turn increased Problem The airplane leaves hand full power within few seconds right wing comes up plane rolls left Solution This caused too much washin right wing panel Excessive left engine thrust left rudder can add problem Make adjustment time however Remove excessive wash-in try again does work try removing some left engine thrust still has left tendency try right rudder tab 1/64 increments accurate rudder tab adjustments use strips balsa taper trailing edge shape Usually strip /4 wide 5/t~ long will suffice Glue strip right side rud der wide edge flush rear rudder Remember too rudder tab adjustments will affect turn under power climb angle well right rudder added climb angle will decrease conversely right rudder decreased climb angle will increase Problem Under full power ship dips right before assuming its correct power pattern Solution Additional left-thrust will elimi nate problem Once trimming com plete other ingredient re quires particular attention practice like way CB flies practice until feel confident its performance confident own pre-flight routine combination well-tuned airplane practiced flier will serve enhance winning tradition Country Boy 28 Model Aviation Another way go metal Tatone tank mount shown Snuffer tube fuse Country Boy show clearly Final wing has multi spars Well caption info indicates Jim hold ing both versions Country Boy taken during test session job right has bottom fin multi-spar wing left has simpler structure
Edition: Model Aviation - 1977/03
Page Numbers: 25, 26, 27, 28
This Half-A has pedigree will satisfy discriminating free/fighter Design Jim Clem Text Photos Larry Kruse JUST AS SURELY names like Cita tion Whirlaway Bold Ruler Foolish Pleasure conjure up glimpses power motion minds horse race fans names like Witch Doctor Scrambler Fire Wagon Okie Bird set free visions swiftness grace minds free fighters Make no mistake about blood lines tell sort competition Jim Clems newest Country Boy latest proven blood line marked contest wins way small est local meet consecutive placings Nationals over ten-year period CB timely ab breviation began curiously enough successor currently popular Okie Bird series favor friend Bob Frazier instrumental development original Witch Doctor 800 inactive mod eler several years early 1976 de cided get back competition trail Jim responded Country Boy first version less re fined version Fire Wagon rudder placed atop stabilizer conferring Jim about design Bob liked everything about except rudder location difficult keep trim two friends sat down drawing board Jim drew Bob provided counsel present configura tion its aft rudder end product overall parameters ship within what Jim has come consider over wyy number years ideal compromise /2A relatively high aspect ratio 75 1 good gliding airfoil Lucky Lindy 275 sq wing area plane small enough climb swiftly yet glide well weighing 7 oz light er built judiciously Country Boy anything up start contest circuit first CB built April 76 has widely tested refined regionally since Ed Cadwell Bob Frazier Houston Bill Jenkins Memphis Jim OReilly John Epley Wichita boasts albeit modestly time first place wins both Fall Freeflight Bash Houston first Tulsa Glue Dobbers Freeflight Fling first Wichihawks Annual Fall Rally fifth 76 Nationals Springfield despite five second engine run fourth flight Future winning potential comes built-in part Country Boys plans Construction Although cut paste instructions arent necessary building CB some commentary specific areas might help wing built flat board conventional fashion however right wing main panel should have 1/s~ wash-in built LE blocked up /8 higher TE polyhedral break well frame wing LE TE ribs omitting spars ribs center dihedral break until after wing panels assembled proper dihedral polyhedral angles procedure makes particularly im portant no twist built wing easy thing top bot tom spars added short pin down panel spars installed sup porting other panels blocking up appropriately prevent over-stressing previously formed joints Gussets 1/16 sheet webbing optional complete basic framework stabilizer construction differs wing bottom spar March 1977 25 Jim CB experts fly de signs tribute reputation years standing CB big 76 winner NO OCR TEXT Country Boy placed plan along leading trailing edges ribs top spars sheeted portion front center can now set together sheeting providing necessary strength D-T hooks remaining construction detailed plans fuselage likewise presents no sur prises except basic framework /s X i/s longerons vertical members 1/8 sq strips pylon area /s X 5/32 strips rudder area sembled complete pylon rudder course directly plan sans sheet fuselage sides moment Pay particular attention perfectly align ing rudder pylon during basic framing process Any misalignment will show up quickly youd amazed quickly later flight testing fuselage framework dry remove plans use template trace 1/16 sheet sides Use Tite Bond some other aliphatic resin glue cement both sides place same time weight down til theyre dry firewall depending motor mount chosen nose blocks can epoxied place extremely impor tant get firewall set correct left downthrust angles tip might useful would make tem plates correct thrust angles 1/32 plywood carefully sand angles front fuselage before epoxying firewall place feel confident simply laying fuselage over plan get correct angles thats fine youll put lot work CB see screw itself ground thrust angles arent accu rate entire ship fuselage included can sanded doped covered Japa nese tissue favorite covering ma terial new slant might terest finish used Jim origi nal Country Boy ship covered aforementioned Japanese tissue water-shrunk given three coats clear nitrate dope nitrate dope covered coat clear epoxy paint fuel proofing After entire contest season high-nitro fuels plane shows no fuel soaking has picked up no weight fuel residues penetrating finish finish simple painless effective weight penalty pay Flight Trimming Before flying check airplane care fully unwanted warps flying sur faces should flat exception right wing should have /s washin Check balance point should CG location shown plan necessary use lead correct im balance Make sure model has left Right Tatone TickOff Half-A timer pinches off fuel line pacifier tank held U-shape wire holder Engine has left thrust engine thrust shown plan Pick time winds calm hand glide plane several times should have long flat glide gentle right turn Stabilizer tilt used turn right tip high looking rear stalling diving occurs CG correct add remove incidence rear stabilizer accordingly glide looks pretty good have plenty courage its time first power run can make fi nal glide adjustments after few power flights first flight should have pow er run two three seconds prop forwards engine running top speed Launch ship steep angle 75 800 slightly right wind should go slightly right keep its March 1977 27 Nose up engine running Jim tops off fuel ship picture does have pacifier tank shown plan Below Principal difference between CB earlier Firewagon series aft vertical tail replaces previous bottom location right dihedral break i/B washin nose up Watch looping tendency zeroing out Either prob lems can corrected removing add ing balsa 1/32 increments 1/16 incidence block under trailing edge stab Country Boy should climb steeply right make half turns nine seconds Transition power glide should smooth loss altitude transition should good 45-second run longer run Trimming problems often arise flying new airplane first time model fly off board built-in adjustments must right proportion another outset likely will happen will some adjustments necessary before ship flying its full potential Know ing precisely what adjustments make solve particular power problem can sometimes challenge help deal some situations listed below power problems adjustments necessary correct Much information has covered before other construction articles relating flying trimming low thrust designs may serve welcome review Problem Under full power airplane begins climbing steeply right As speed builds up right wing drops ship levels out Solution This caused com bination following enough left engine thrust enough wash-in right main wing panel too much right rud der too much incidence Keep latter very much mind built leftthrust shown plan have right amount wash-in called remove 1/32 incidence block under rear stab will probably cure problem However may have add small amount weight tail com pensate glide So effect what has happened CG has moved aft get desired climb Too far aft however ship will level out dive An other point remember remove balsa under rear stab removes some right turn Conversely add incidence right turn increased Problem The airplane leaves hand full power within few seconds right wing comes up plane rolls left Solution This caused too much washin right wing panel Excessive left engine thrust left rudder can add problem Make adjustment time however Remove excessive wash-in try again does work try removing some left engine thrust still has left tendency try right rudder tab 1/64 increments accurate rudder tab adjustments use strips balsa taper trailing edge shape Usually strip /4 wide 5/t~ long will suffice Glue strip right side rud der wide edge flush rear rudder Remember too rudder tab adjustments will affect turn under power climb angle well right rudder added climb angle will decrease conversely right rudder decreased climb angle will increase Problem Under full power ship dips right before assuming its correct power pattern Solution Additional left-thrust will elimi nate problem Once trimming com plete other ingredient re quires particular attention practice like way CB flies practice until feel confident its performance confident own pre-flight routine combination well-tuned airplane practiced flier will serve enhance winning tradition Country Boy 28 Model Aviation Another way go metal Tatone tank mount shown Snuffer tube fuse Country Boy show clearly Final wing has multi spars Well caption info indicates Jim hold ing both versions Country Boy taken during test session job right has bottom fin multi-spar wing left has simpler structure
Edition: Model Aviation - 1977/03
Page Numbers: 25, 26, 27, 28
This Half-A has pedigree will satisfy discriminating free/fighter Design Jim Clem Text Photos Larry Kruse JUST AS SURELY names like Cita tion Whirlaway Bold Ruler Foolish Pleasure conjure up glimpses power motion minds horse race fans names like Witch Doctor Scrambler Fire Wagon Okie Bird set free visions swiftness grace minds free fighters Make no mistake about blood lines tell sort competition Jim Clems newest Country Boy latest proven blood line marked contest wins way small est local meet consecutive placings Nationals over ten-year period CB timely ab breviation began curiously enough successor currently popular Okie Bird series favor friend Bob Frazier instrumental development original Witch Doctor 800 inactive mod eler several years early 1976 de cided get back competition trail Jim responded Country Boy first version less re fined version Fire Wagon rudder placed atop stabilizer conferring Jim about design Bob liked everything about except rudder location difficult keep trim two friends sat down drawing board Jim drew Bob provided counsel present configura tion its aft rudder end product overall parameters ship within what Jim has come consider over wyy number years ideal compromise /2A relatively high aspect ratio 75 1 good gliding airfoil Lucky Lindy 275 sq wing area plane small enough climb swiftly yet glide well weighing 7 oz light er built judiciously Country Boy anything up start contest circuit first CB built April 76 has widely tested refined regionally since Ed Cadwell Bob Frazier Houston Bill Jenkins Memphis Jim OReilly John Epley Wichita boasts albeit modestly time first place wins both Fall Freeflight Bash Houston first Tulsa Glue Dobbers Freeflight Fling first Wichihawks Annual Fall Rally fifth 76 Nationals Springfield despite five second engine run fourth flight Future winning potential comes built-in part Country Boys plans Construction Although cut paste instructions arent necessary building CB some commentary specific areas might help wing built flat board conventional fashion however right wing main panel should have 1/s~ wash-in built LE blocked up /8 higher TE polyhedral break well frame wing LE TE ribs omitting spars ribs center dihedral break until after wing panels assembled proper dihedral polyhedral angles procedure makes particularly im portant no twist built wing easy thing top bot tom spars added short pin down panel spars installed sup porting other panels blocking up appropriately prevent over-stressing previously formed joints Gussets 1/16 sheet webbing optional complete basic framework stabilizer construction differs wing bottom spar March 1977 25 Jim CB experts fly de signs tribute reputation years standing CB big 76 winner NO OCR TEXT Country Boy placed plan along leading trailing edges ribs top spars sheeted portion front center can now set together sheeting providing necessary strength D-T hooks remaining construction detailed plans fuselage likewise presents no sur prises except basic framework /s X i/s longerons vertical members 1/8 sq strips pylon area /s X 5/32 strips rudder area sembled complete pylon rudder course directly plan sans sheet fuselage sides moment Pay particular attention perfectly align ing rudder pylon during basic framing process Any misalignment will show up quickly youd amazed quickly later flight testing fuselage framework dry remove plans use template trace 1/16 sheet sides Use Tite Bond some other aliphatic resin glue cement both sides place same time weight down til theyre dry firewall depending motor mount chosen nose blocks can epoxied place extremely impor tant get firewall set correct left downthrust angles tip might useful would make tem plates correct thrust angles 1/32 plywood carefully sand angles front fuselage before epoxying firewall place feel confident simply laying fuselage over plan get correct angles thats fine youll put lot work CB see screw itself ground thrust angles arent accu rate entire ship fuselage included can sanded doped covered Japa nese tissue favorite covering ma terial new slant might terest finish used Jim origi nal Country Boy ship covered aforementioned Japanese tissue water-shrunk given three coats clear nitrate dope nitrate dope covered coat clear epoxy paint fuel proofing After entire contest season high-nitro fuels plane shows no fuel soaking has picked up no weight fuel residues penetrating finish finish simple painless effective weight penalty pay Flight Trimming Before flying check airplane care fully unwanted warps flying sur faces should flat exception right wing should have /s washin Check balance point should CG location shown plan necessary use lead correct im balance Make sure model has left Right Tatone TickOff Half-A timer pinches off fuel line pacifier tank held U-shape wire holder Engine has left thrust engine thrust shown plan Pick time winds calm hand glide plane several times should have long flat glide gentle right turn Stabilizer tilt used turn right tip high looking rear stalling diving occurs CG correct add remove incidence rear stabilizer accordingly glide looks pretty good have plenty courage its time first power run can make fi nal glide adjustments after few power flights first flight should have pow er run two three seconds prop forwards engine running top speed Launch ship steep angle 75 800 slightly right wind should go slightly right keep its March 1977 27 Nose up engine running Jim tops off fuel ship picture does have pacifier tank shown plan Below Principal difference between CB earlier Firewagon series aft vertical tail replaces previous bottom location right dihedral break i/B washin nose up Watch looping tendency zeroing out Either prob lems can corrected removing add ing balsa 1/32 increments 1/16 incidence block under trailing edge stab Country Boy should climb steeply right make half turns nine seconds Transition power glide should smooth loss altitude transition should good 45-second run longer run Trimming problems often arise flying new airplane first time model fly off board built-in adjustments must right proportion another outset likely will happen will some adjustments necessary before ship flying its full potential Know ing precisely what adjustments make solve particular power problem can sometimes challenge help deal some situations listed below power problems adjustments necessary correct Much information has covered before other construction articles relating flying trimming low thrust designs may serve welcome review Problem Under full power airplane begins climbing steeply right As speed builds up right wing drops ship levels out Solution This caused com bination following enough left engine thrust enough wash-in right main wing panel too much right rud der too much incidence Keep latter very much mind built leftthrust shown plan have right amount wash-in called remove 1/32 incidence block under rear stab will probably cure problem However may have add small amount weight tail com pensate glide So effect what has happened CG has moved aft get desired climb Too far aft however ship will level out dive An other point remember remove balsa under rear stab removes some right turn Conversely add incidence right turn increased Problem The airplane leaves hand full power within few seconds right wing comes up plane rolls left Solution This caused too much washin right wing panel Excessive left engine thrust left rudder can add problem Make adjustment time however Remove excessive wash-in try again does work try removing some left engine thrust still has left tendency try right rudder tab 1/64 increments accurate rudder tab adjustments use strips balsa taper trailing edge shape Usually strip /4 wide 5/t~ long will suffice Glue strip right side rud der wide edge flush rear rudder Remember too rudder tab adjustments will affect turn under power climb angle well right rudder added climb angle will decrease conversely right rudder decreased climb angle will increase Problem Under full power ship dips right before assuming its correct power pattern Solution Additional left-thrust will elimi nate problem Once trimming com plete other ingredient re quires particular attention practice like way CB flies practice until feel confident its performance confident own pre-flight routine combination well-tuned airplane practiced flier will serve enhance winning tradition Country Boy 28 Model Aviation Another way go metal Tatone tank mount shown Snuffer tube fuse Country Boy show clearly Final wing has multi spars Well caption info indicates Jim hold ing both versions Country Boy taken during test session job right has bottom fin multi-spar wing left has simpler structure