HE ORIGINAL BARNABUS all- balsa V-dihedral 18-inchspan Outdoor Hand-Launched Glider designed 1952 flew surprisingly well very stable thermals won its share contests summer fall 1952 1953 Barnabus flown Bob Barney AMA National Record 12 minutes 124 seconds salt flats near Salt Lake City Utah design has since won scores contests throughout western US won first OHLG Rocket 1968 Nationals 1975 Utah State Aeromodelers organized free flight competition three-man teams beautiful Free Flight Team Cup perpetual trophy Taft Thermaleers team quickly formed consisting Barney Chris Mike Taft fleet Barnabus gliders combination retired coveted Team Cup winning four consecutive years After 1981 move Rancho Mirage California aging Taft Thermaleers couldnt resist radio control soon built flew several RC models sons Chris Mike Cory constantly pressing build RC Barnabus hand-launched glider quickly caved retired drawing board After scaling up original model 60-inch-span two-channel monster three slightly different designs built flown improvements made needed final version soon specking out good air fairly consistent basis Top all-sheet Barnabus floats Above Author demonstrates proper launch technique wind wings level nose up wingspan maximum allowed AMA rules RC HLG results wing area 464 square inches airfoil highly touted 5D7037 Its low drag allows good speed range gives high launches its slight undercamber gives excellent thermaling ability light lift ample V dihedral slight washout wingtip seems provide good stability strong thermals tight turns 16 Model Aviation TRUCTION YOU afflicted am foamo phobia fear foam vacubagophobia fear vacuum-bagging Barnabuss construction wing uses standard balsa construction 2 light balsa skins top bottom medium balsa spars have /i6 sheet balsa shear webs 007 carbon fiber strip reinforcements trailing edge tips have 007 X /2 carbon fiber strips sand wiched between top bottom skins giving super-sharp trailing edge very strong wingtips Order 007 carbon fiber strip Aerospace Composite Products PO Box 16621 Irvine CA 92714 Tel 714 250-1107 will need about five feet one-inch strip #CLl WING Make top bottom skins very light A2 x 3 x 36 balsa sheets best wood available Champion Model Products 880 Carmen Court La Verne CA 91750 Tel 714 599-3348 Proper wood selection can reduce finished weight model fifty percent Use aluminum ruler true edges sheets tight butt-fit joints Run strip masking tape along side joint turn sheets over open hinge run thin bead aliphatic resin AR glue along joint Wipe off excess glue damp rag cover waxed paper weight books fiat surface allow dry about hour Remove weights waxed paper turn skins over remove masking tape being careful remove part skins Cut cardboard wingtip pattern use pencil mark tip locations skins Cut tips shape pair sharp scissors Use #2 pencil straightedge drafting triangle mark spar rib locations top bottom skins After sanding 3A2 x 3 wing shim tack-glue plan rubber cement Pin 3/4 x i6 trailing-edge-stock shim place Place waxed paper over both shims pin bottom skins plan making certain pencil-marked spar rib locations facing up Glue 007 x 1 carbon fiber reinforce ment strips inner 14 inches wing spar 5-minute epoxy bottom spar attached skin 5-minute epoxy carbon-reinforced area AR glue outer portion Now glue Rl ribs AR pin ning necessary get good bond undercambered portion Phillips entry part leading edge Now glue wingtip ribs R2 R3 R4 Use sharp scissors cut trailing edge wingtips 007 x 1 carbon fiber strip glue place bottom skins 5-minute epoxy dry care fully sand trailing edge wingtips sharp edges will take much sanding because 007 less /I2s inch Slide shims 81 S2 under wingtips slide x out shims place top shims 81 S2 Cut sand leading edge shape glue strip /i6 x 5/~ balsa rear leading edge forming shelves top bottom skins Glue leading edge place AR glue making certain bottom skin flush its shelf A6 balsa shear webs between Ri ribs attached cyanoacrylate CyA glue Add top spar AR glue use 5-minute epoxy glue -inch sheet balsa wingtip leading edges top carbon fiber strips September 1993 17 Barnabus ready hi-start launch author believes best initial test flights Taft Thermaleers free flight team L Fl Mike barney Chris Taft original Barnabus hand-launched gliders Thermaleers retired Utah State Aeromodelers Team Cup center after consecutive wins 1975-78 Top view shows slim fuselage 464-square-inch wing Elliptical tips popular early 1950s original Barnabus HIG designed After wing skins have glued together rib spar locations tip outlines marked bottom skin Full Size Plans AvailableSee Page 176 AlA 005 CARBON FIBER STRIP V LEFT WING PLAN ASS VEST /CRT/NVBBO Alt5 1/A BASSO STIR 53 PLACES OR TSP AR 5-SVS B-B TO BUlLS WASHOUT SACR TIPSVSBLITE BALSA HOEF P FROM HOTiVBH I/HI/I IIL IN RURH RH II ILIZER IIIrII IIIJIIIJIII SIALL NOITN OHOLi VIT%%F5II2 RIBA TIP LE SB ITSALLOVAS CUBLONSAEUThS BALSA HO TAR OP THOPIERS S CLEVIS3/SASS/B CARGO FIBER BTRIP -II7 ]jSOHOCE II\II ii K BASEMENTL tWOI/SUP RHOOEn RINSE EHOHTR VA RU B LTREP MAO LBS ITRBRTII\I 41BOOS 0 R-4 PRATE SOT CARRElR-2 IIIINOTE ALL 51ST RIBO ARE onPIE S RUSHER 148 I540 LITO BALSA IIBTRDBA ISNEET IU I/B BALSAAl-ll-l- BAREISA VATLTRIBS F 3ANTIS R/AWING OETAILtF1S11 T/AS R SALSU LIlTILC7--------j/---4 HISS SPAS00 F IF 2F 3 SATCHF-7F-BOIBA URSAAAR TO IS SAN RITE-RAE03255142 BOLTC2U/I" uSC PLCWINS ITARIRS08 50 US SAUCNPTDIHEDRAL BRACESISP SACSAIRHOIL50 TORT PACRl05% /4 BALSA LSSAERS [2 LLT ITCS~Th -- -if I/TBPLT TBREHOUS -___________ FlTSRRIOTSI ACOTONAIOBAR /SIDE VIEWUS BALSA SIRES SERVOPSP-S TAUVEEpFUSELAGE BALSABOTTOMFH I I/ROT ERHO55I/IS RI/UBOTTOM ORHIR BLOTS I SHOJCECR BALSA RREETRAIRALENSTII -WIRE T1R/RITEN SIA30 1111 MODEL AVIATION oo W BATS HOVESSRTCSFISHER HOLEUSA PRO SR/BIERFUSELAGEyr SHOTPROM SERE PHOTBATOBARNABUS I/IBLIUS BALSA POSE SITE -PULL IERHURSERISSER RT RuSSET TAFT FUSELAGE LER PATTERN lURES PLAN BY AGE 05MAR05 tt7ALL ROOTS RERERVESMA PLAN Glue dihedral gussets half wing AR using clothespins hold place Allow dry thoroughly Attach top skin follows Apply 30minute epoxy 007 carbon-fiber tailing edge wingtips top spar reinforcements Now apply AR glue liberally aH ribs Wing construction progress Note 007 carbon-fiber strips trailing edge viingtips spar centers balsa portion top spar balsa portion wingtip leading edge Position top skin pin down leading edge care fully fit skin shelf weight skin several thick magazines get good bond rib Use several clothespins hold wingtips tightly together until thoroughly dry Glue wing halves together AR blocking up tip five inches dry lightly sand wing 400-grit paper very careful sand through skins Glue plywood reinforcement F7 top wing drill 8-32 nylon bolt Drill leading edge wing 1/8 birch dowel glue place CyA FUSELAGE Using pattern shown plans cut two fuselage sides V16 light balsa two doublers / plywood Sharp scissors work fine task quicker using modeling knives Attach doublers fuselage sides AR glue making certain have right left Place waxed paper top weight down books allow dry thoroughly Attach A6 x a longerons AR glue weight down books allow dry cut formers Again sharp scissors work fine except Continued page 74 18 Model Aviation LS BALSA V iTSS S/15 BET RULSA SUB-IE SUE TT ALLOW FOR ITO TSP S RIGHT WING PLAN 3/TA LIUSIUT Type RC glider Wingspan 60 inches Number channels Two Flying weight 15 ounces Construction balsa Covering/finish AeroGloss Balsa Fillercoat Coverite Glaskote MonoKote trim Top skin attached 30-minute epoxy spar trailing edge tips aliphatic resin glue ribs LE Barnabusjyaft Continued paqe 18 longeron notches round holes will need sharp razor blade Note two F3A formers glued front back F3 drilled 1/ birch wing dowel assure straight fuselage pin 3A6-square balsa guides top view fuselage plan place fuselage sides between glue formers gap-filling CyA Mark bottom fuselage cover 142 plywood Cut out sharp scissors glue place CyA Likewise mark bottom rear fuselage cover light 146 balsa cut out grain lengthwise glue place CyA Use CyA attach F6 top bottom plywood cover well 045 wire towhook /16 plywood finger hole also glued bottom A2 ply wood bottom CyA Cut balsa nose block shape glue place Drill tap plywood former F8 receive 8-32 nylon wing bolt gives strong snug wing hold-down out use flaky blind mounting nut RADIO INSTALLATION Install microservos servo-mounting tape attaching securely both bot tom sides fuselage shown plans After placing battery pack microreceiver position install #507 Sullivan control rod sheaths making certain glue fuselage sides several places prevent buckling Make Z bends control rods hook up servos strengthen running coat solder rods about six inches past bends gives snug light weight slop-free connection Place control rods sheaths hook control rods servos Attach rudder control rod outer servo arm hole elevator control rod innermost servo arm hole gives maximum rudder movement mini mum elevator movement control rods sheaths exit fuselage rear cut exact length until after tail has installed TAIL Cut fin rudder stab elevator very light A2 sheet sand edges round install #RK 2-7 Klett hinges trimmed A2 ends hinge save weight make installation easier Glue tail fuselage CyA attach smallest control horns can lo cate cant locate small enough make own 146 plywood Cut control rod sheaths control rods proper length attach #507 Sullivan devises leaving room final adjustments screwing out Adjust throw give 1 inches rudder elevator way Glue receiver antenna tube glue 146 balsa top rear fuselage cover grain running crosswise Carve front fuselage hatch soft balsa glue 045 wire front hold-down rear hold-down small servo screw former F3 rear portion hatch glued wing COVERING/PAINTING original given two coats AeroGloss Balsa Fillercoat sanded 400-grit paper after coat coat Coverite Glaskote gives light glossy finish MonoKote trim can applied Other coverings may used weight should considered Litespan lightest available Charlies R/C Goodies 2828 Cochran Street Suite 281 Simi Valley CA 93065 Tel 805 581-5061 Coverites Micafllm next lightest come other popular iron-ons such MonoKote UltraCote etc Use arent too concerned about weight FLYING important part preflight preparation properly locating center gravity Make certain model bal ances exactly 2/s inches leading edge wing will probably have add least ounce lead nose achieve balance point Continued page 134 74 Model Aviation
Edition: Model Aviation - 1993/09
Page Numbers: 16, 17, 18, 74
HE ORIGINAL BARNABUS all- balsa V-dihedral 18-inchspan Outdoor Hand-Launched Glider designed 1952 flew surprisingly well very stable thermals won its share contests summer fall 1952 1953 Barnabus flown Bob Barney AMA National Record 12 minutes 124 seconds salt flats near Salt Lake City Utah design has since won scores contests throughout western US won first OHLG Rocket 1968 Nationals 1975 Utah State Aeromodelers organized free flight competition three-man teams beautiful Free Flight Team Cup perpetual trophy Taft Thermaleers team quickly formed consisting Barney Chris Mike Taft fleet Barnabus gliders combination retired coveted Team Cup winning four consecutive years After 1981 move Rancho Mirage California aging Taft Thermaleers couldnt resist radio control soon built flew several RC models sons Chris Mike Cory constantly pressing build RC Barnabus hand-launched glider quickly caved retired drawing board After scaling up original model 60-inch-span two-channel monster three slightly different designs built flown improvements made needed final version soon specking out good air fairly consistent basis Top all-sheet Barnabus floats Above Author demonstrates proper launch technique wind wings level nose up wingspan maximum allowed AMA rules RC HLG results wing area 464 square inches airfoil highly touted 5D7037 Its low drag allows good speed range gives high launches its slight undercamber gives excellent thermaling ability light lift ample V dihedral slight washout wingtip seems provide good stability strong thermals tight turns 16 Model Aviation TRUCTION YOU afflicted am foamo phobia fear foam vacubagophobia fear vacuum-bagging Barnabuss construction wing uses standard balsa construction 2 light balsa skins top bottom medium balsa spars have /i6 sheet balsa shear webs 007 carbon fiber strip reinforcements trailing edge tips have 007 X /2 carbon fiber strips sand wiched between top bottom skins giving super-sharp trailing edge very strong wingtips Order 007 carbon fiber strip Aerospace Composite Products PO Box 16621 Irvine CA 92714 Tel 714 250-1107 will need about five feet one-inch strip #CLl WING Make top bottom skins very light A2 x 3 x 36 balsa sheets best wood available Champion Model Products 880 Carmen Court La Verne CA 91750 Tel 714 599-3348 Proper wood selection can reduce finished weight model fifty percent Use aluminum ruler true edges sheets tight butt-fit joints Run strip masking tape along side joint turn sheets over open hinge run thin bead aliphatic resin AR glue along joint Wipe off excess glue damp rag cover waxed paper weight books fiat surface allow dry about hour Remove weights waxed paper turn skins over remove masking tape being careful remove part skins Cut cardboard wingtip pattern use pencil mark tip locations skins Cut tips shape pair sharp scissors Use #2 pencil straightedge drafting triangle mark spar rib locations top bottom skins After sanding 3A2 x 3 wing shim tack-glue plan rubber cement Pin 3/4 x i6 trailing-edge-stock shim place Place waxed paper over both shims pin bottom skins plan making certain pencil-marked spar rib locations facing up Glue 007 x 1 carbon fiber reinforce ment strips inner 14 inches wing spar 5-minute epoxy bottom spar attached skin 5-minute epoxy carbon-reinforced area AR glue outer portion Now glue Rl ribs AR pin ning necessary get good bond undercambered portion Phillips entry part leading edge Now glue wingtip ribs R2 R3 R4 Use sharp scissors cut trailing edge wingtips 007 x 1 carbon fiber strip glue place bottom skins 5-minute epoxy dry care fully sand trailing edge wingtips sharp edges will take much sanding because 007 less /I2s inch Slide shims 81 S2 under wingtips slide x out shims place top shims 81 S2 Cut sand leading edge shape glue strip /i6 x 5/~ balsa rear leading edge forming shelves top bottom skins Glue leading edge place AR glue making certain bottom skin flush its shelf A6 balsa shear webs between Ri ribs attached cyanoacrylate CyA glue Add top spar AR glue use 5-minute epoxy glue -inch sheet balsa wingtip leading edges top carbon fiber strips September 1993 17 Barnabus ready hi-start launch author believes best initial test flights Taft Thermaleers free flight team L Fl Mike barney Chris Taft original Barnabus hand-launched gliders Thermaleers retired Utah State Aeromodelers Team Cup center after consecutive wins 1975-78 Top view shows slim fuselage 464-square-inch wing Elliptical tips popular early 1950s original Barnabus HIG designed After wing skins have glued together rib spar locations tip outlines marked bottom skin Full Size Plans AvailableSee Page 176 AlA 005 CARBON FIBER STRIP V LEFT WING PLAN ASS VEST /CRT/NVBBO Alt5 1/A BASSO STIR 53 PLACES OR TSP AR 5-SVS B-B TO BUlLS WASHOUT SACR TIPSVSBLITE BALSA HOEF P FROM HOTiVBH I/HI/I IIL IN RURH RH II ILIZER IIIrII IIIJIIIJIII SIALL NOITN OHOLi VIT%%F5II2 RIBA TIP LE SB ITSALLOVAS CUBLONSAEUThS BALSA HO TAR OP THOPIERS S CLEVIS3/SASS/B CARGO FIBER BTRIP -II7 ]jSOHOCE II\II ii K BASEMENTL tWOI/SUP RHOOEn RINSE EHOHTR VA RU B LTREP MAO LBS ITRBRTII\I 41BOOS 0 R-4 PRATE SOT CARRElR-2 IIIINOTE ALL 51ST RIBO ARE onPIE S RUSHER 148 I540 LITO BALSA IIBTRDBA ISNEET IU I/B BALSAAl-ll-l- BAREISA VATLTRIBS F 3ANTIS R/AWING OETAILtF1S11 T/AS R SALSU LIlTILC7--------j/---4 HISS SPAS00 F IF 2F 3 SATCHF-7F-BOIBA URSAAAR TO IS SAN RITE-RAE03255142 BOLTC2U/I" uSC PLCWINS ITARIRS08 50 US SAUCNPTDIHEDRAL BRACESISP SACSAIRHOIL50 TORT PACRl05% /4 BALSA LSSAERS [2 LLT ITCS~Th -- -if I/TBPLT TBREHOUS -___________ FlTSRRIOTSI ACOTONAIOBAR /SIDE VIEWUS BALSA SIRES SERVOPSP-S TAUVEEpFUSELAGE BALSABOTTOMFH I I/ROT ERHO55I/IS RI/UBOTTOM ORHIR BLOTS I SHOJCECR BALSA RREETRAIRALENSTII -WIRE T1R/RITEN SIA30 1111 MODEL AVIATION oo W BATS HOVESSRTCSFISHER HOLEUSA PRO SR/BIERFUSELAGEyr SHOTPROM SERE PHOTBATOBARNABUS I/IBLIUS BALSA POSE SITE -PULL IERHURSERISSER RT RuSSET TAFT FUSELAGE LER PATTERN lURES PLAN BY AGE 05MAR05 tt7ALL ROOTS RERERVESMA PLAN Glue dihedral gussets half wing AR using clothespins hold place Allow dry thoroughly Attach top skin follows Apply 30minute epoxy 007 carbon-fiber tailing edge wingtips top spar reinforcements Now apply AR glue liberally aH ribs Wing construction progress Note 007 carbon-fiber strips trailing edge viingtips spar centers balsa portion top spar balsa portion wingtip leading edge Position top skin pin down leading edge care fully fit skin shelf weight skin several thick magazines get good bond rib Use several clothespins hold wingtips tightly together until thoroughly dry Glue wing halves together AR blocking up tip five inches dry lightly sand wing 400-grit paper very careful sand through skins Glue plywood reinforcement F7 top wing drill 8-32 nylon bolt Drill leading edge wing 1/8 birch dowel glue place CyA FUSELAGE Using pattern shown plans cut two fuselage sides V16 light balsa two doublers / plywood Sharp scissors work fine task quicker using modeling knives Attach doublers fuselage sides AR glue making certain have right left Place waxed paper top weight down books allow dry thoroughly Attach A6 x a longerons AR glue weight down books allow dry cut formers Again sharp scissors work fine except Continued page 74 18 Model Aviation LS BALSA V iTSS S/15 BET RULSA SUB-IE SUE TT ALLOW FOR ITO TSP S RIGHT WING PLAN 3/TA LIUSIUT Type RC glider Wingspan 60 inches Number channels Two Flying weight 15 ounces Construction balsa Covering/finish AeroGloss Balsa Fillercoat Coverite Glaskote MonoKote trim Top skin attached 30-minute epoxy spar trailing edge tips aliphatic resin glue ribs LE Barnabusjyaft Continued paqe 18 longeron notches round holes will need sharp razor blade Note two F3A formers glued front back F3 drilled 1/ birch wing dowel assure straight fuselage pin 3A6-square balsa guides top view fuselage plan place fuselage sides between glue formers gap-filling CyA Mark bottom fuselage cover 142 plywood Cut out sharp scissors glue place CyA Likewise mark bottom rear fuselage cover light 146 balsa cut out grain lengthwise glue place CyA Use CyA attach F6 top bottom plywood cover well 045 wire towhook /16 plywood finger hole also glued bottom A2 ply wood bottom CyA Cut balsa nose block shape glue place Drill tap plywood former F8 receive 8-32 nylon wing bolt gives strong snug wing hold-down out use flaky blind mounting nut RADIO INSTALLATION Install microservos servo-mounting tape attaching securely both bot tom sides fuselage shown plans After placing battery pack microreceiver position install #507 Sullivan control rod sheaths making certain glue fuselage sides several places prevent buckling Make Z bends control rods hook up servos strengthen running coat solder rods about six inches past bends gives snug light weight slop-free connection Place control rods sheaths hook control rods servos Attach rudder control rod outer servo arm hole elevator control rod innermost servo arm hole gives maximum rudder movement mini mum elevator movement control rods sheaths exit fuselage rear cut exact length until after tail has installed TAIL Cut fin rudder stab elevator very light A2 sheet sand edges round install #RK 2-7 Klett hinges trimmed A2 ends hinge save weight make installation easier Glue tail fuselage CyA attach smallest control horns can lo cate cant locate small enough make own 146 plywood Cut control rod sheaths control rods proper length attach #507 Sullivan devises leaving room final adjustments screwing out Adjust throw give 1 inches rudder elevator way Glue receiver antenna tube glue 146 balsa top rear fuselage cover grain running crosswise Carve front fuselage hatch soft balsa glue 045 wire front hold-down rear hold-down small servo screw former F3 rear portion hatch glued wing COVERING/PAINTING original given two coats AeroGloss Balsa Fillercoat sanded 400-grit paper after coat coat Coverite Glaskote gives light glossy finish MonoKote trim can applied Other coverings may used weight should considered Litespan lightest available Charlies R/C Goodies 2828 Cochran Street Suite 281 Simi Valley CA 93065 Tel 805 581-5061 Coverites Micafllm next lightest come other popular iron-ons such MonoKote UltraCote etc Use arent too concerned about weight FLYING important part preflight preparation properly locating center gravity Make certain model bal ances exactly 2/s inches leading edge wing will probably have add least ounce lead nose achieve balance point Continued page 134 74 Model Aviation
Edition: Model Aviation - 1993/09
Page Numbers: 16, 17, 18, 74
HE ORIGINAL BARNABUS all- balsa V-dihedral 18-inchspan Outdoor Hand-Launched Glider designed 1952 flew surprisingly well very stable thermals won its share contests summer fall 1952 1953 Barnabus flown Bob Barney AMA National Record 12 minutes 124 seconds salt flats near Salt Lake City Utah design has since won scores contests throughout western US won first OHLG Rocket 1968 Nationals 1975 Utah State Aeromodelers organized free flight competition three-man teams beautiful Free Flight Team Cup perpetual trophy Taft Thermaleers team quickly formed consisting Barney Chris Mike Taft fleet Barnabus gliders combination retired coveted Team Cup winning four consecutive years After 1981 move Rancho Mirage California aging Taft Thermaleers couldnt resist radio control soon built flew several RC models sons Chris Mike Cory constantly pressing build RC Barnabus hand-launched glider quickly caved retired drawing board After scaling up original model 60-inch-span two-channel monster three slightly different designs built flown improvements made needed final version soon specking out good air fairly consistent basis Top all-sheet Barnabus floats Above Author demonstrates proper launch technique wind wings level nose up wingspan maximum allowed AMA rules RC HLG results wing area 464 square inches airfoil highly touted 5D7037 Its low drag allows good speed range gives high launches its slight undercamber gives excellent thermaling ability light lift ample V dihedral slight washout wingtip seems provide good stability strong thermals tight turns 16 Model Aviation TRUCTION YOU afflicted am foamo phobia fear foam vacubagophobia fear vacuum-bagging Barnabuss construction wing uses standard balsa construction 2 light balsa skins top bottom medium balsa spars have /i6 sheet balsa shear webs 007 carbon fiber strip reinforcements trailing edge tips have 007 X /2 carbon fiber strips sand wiched between top bottom skins giving super-sharp trailing edge very strong wingtips Order 007 carbon fiber strip Aerospace Composite Products PO Box 16621 Irvine CA 92714 Tel 714 250-1107 will need about five feet one-inch strip #CLl WING Make top bottom skins very light A2 x 3 x 36 balsa sheets best wood available Champion Model Products 880 Carmen Court La Verne CA 91750 Tel 714 599-3348 Proper wood selection can reduce finished weight model fifty percent Use aluminum ruler true edges sheets tight butt-fit joints Run strip masking tape along side joint turn sheets over open hinge run thin bead aliphatic resin AR glue along joint Wipe off excess glue damp rag cover waxed paper weight books fiat surface allow dry about hour Remove weights waxed paper turn skins over remove masking tape being careful remove part skins Cut cardboard wingtip pattern use pencil mark tip locations skins Cut tips shape pair sharp scissors Use #2 pencil straightedge drafting triangle mark spar rib locations top bottom skins After sanding 3A2 x 3 wing shim tack-glue plan rubber cement Pin 3/4 x i6 trailing-edge-stock shim place Place waxed paper over both shims pin bottom skins plan making certain pencil-marked spar rib locations facing up Glue 007 x 1 carbon fiber reinforce ment strips inner 14 inches wing spar 5-minute epoxy bottom spar attached skin 5-minute epoxy carbon-reinforced area AR glue outer portion Now glue Rl ribs AR pin ning necessary get good bond undercambered portion Phillips entry part leading edge Now glue wingtip ribs R2 R3 R4 Use sharp scissors cut trailing edge wingtips 007 x 1 carbon fiber strip glue place bottom skins 5-minute epoxy dry care fully sand trailing edge wingtips sharp edges will take much sanding because 007 less /I2s inch Slide shims 81 S2 under wingtips slide x out shims place top shims 81 S2 Cut sand leading edge shape glue strip /i6 x 5/~ balsa rear leading edge forming shelves top bottom skins Glue leading edge place AR glue making certain bottom skin flush its shelf A6 balsa shear webs between Ri ribs attached cyanoacrylate CyA glue Add top spar AR glue use 5-minute epoxy glue -inch sheet balsa wingtip leading edges top carbon fiber strips September 1993 17 Barnabus ready hi-start launch author believes best initial test flights Taft Thermaleers free flight team L Fl Mike barney Chris Taft original Barnabus hand-launched gliders Thermaleers retired Utah State Aeromodelers Team Cup center after consecutive wins 1975-78 Top view shows slim fuselage 464-square-inch wing Elliptical tips popular early 1950s original Barnabus HIG designed After wing skins have glued together rib spar locations tip outlines marked bottom skin Full Size Plans AvailableSee Page 176 AlA 005 CARBON FIBER STRIP V LEFT WING PLAN ASS VEST /CRT/NVBBO Alt5 1/A BASSO STIR 53 PLACES OR TSP AR 5-SVS B-B TO BUlLS WASHOUT SACR TIPSVSBLITE BALSA HOEF P FROM HOTiVBH I/HI/I IIL IN RURH RH II ILIZER IIIrII IIIJIIIJIII SIALL NOITN OHOLi VIT%%F5II2 RIBA TIP LE SB ITSALLOVAS CUBLONSAEUThS BALSA HO TAR OP THOPIERS S CLEVIS3/SASS/B CARGO FIBER BTRIP -II7 ]jSOHOCE II\II ii K BASEMENTL tWOI/SUP RHOOEn RINSE EHOHTR VA RU B LTREP MAO LBS ITRBRTII\I 41BOOS 0 R-4 PRATE SOT CARRElR-2 IIIINOTE ALL 51ST RIBO ARE onPIE S RUSHER 148 I540 LITO BALSA IIBTRDBA ISNEET IU I/B BALSAAl-ll-l- BAREISA VATLTRIBS F 3ANTIS R/AWING OETAILtF1S11 T/AS R SALSU LIlTILC7--------j/---4 HISS SPAS00 F IF 2F 3 SATCHF-7F-BOIBA URSAAAR TO IS SAN RITE-RAE03255142 BOLTC2U/I" uSC PLCWINS ITARIRS08 50 US SAUCNPTDIHEDRAL BRACESISP SACSAIRHOIL50 TORT PACRl05% /4 BALSA LSSAERS [2 LLT ITCS~Th -- -if I/TBPLT TBREHOUS -___________ FlTSRRIOTSI ACOTONAIOBAR /SIDE VIEWUS BALSA SIRES SERVOPSP-S TAUVEEpFUSELAGE BALSABOTTOMFH I I/ROT ERHO55I/IS RI/UBOTTOM ORHIR BLOTS I SHOJCECR BALSA RREETRAIRALENSTII -WIRE T1R/RITEN SIA30 1111 MODEL AVIATION oo W BATS HOVESSRTCSFISHER HOLEUSA PRO SR/BIERFUSELAGEyr SHOTPROM SERE PHOTBATOBARNABUS I/IBLIUS BALSA POSE SITE -PULL IERHURSERISSER RT RuSSET TAFT FUSELAGE LER PATTERN lURES PLAN BY AGE 05MAR05 tt7ALL ROOTS RERERVESMA PLAN Glue dihedral gussets half wing AR using clothespins hold place Allow dry thoroughly Attach top skin follows Apply 30minute epoxy 007 carbon-fiber tailing edge wingtips top spar reinforcements Now apply AR glue liberally aH ribs Wing construction progress Note 007 carbon-fiber strips trailing edge viingtips spar centers balsa portion top spar balsa portion wingtip leading edge Position top skin pin down leading edge care fully fit skin shelf weight skin several thick magazines get good bond rib Use several clothespins hold wingtips tightly together until thoroughly dry Glue wing halves together AR blocking up tip five inches dry lightly sand wing 400-grit paper very careful sand through skins Glue plywood reinforcement F7 top wing drill 8-32 nylon bolt Drill leading edge wing 1/8 birch dowel glue place CyA FUSELAGE Using pattern shown plans cut two fuselage sides V16 light balsa two doublers / plywood Sharp scissors work fine task quicker using modeling knives Attach doublers fuselage sides AR glue making certain have right left Place waxed paper top weight down books allow dry thoroughly Attach A6 x a longerons AR glue weight down books allow dry cut formers Again sharp scissors work fine except Continued page 74 18 Model Aviation LS BALSA V iTSS S/15 BET RULSA SUB-IE SUE TT ALLOW FOR ITO TSP S RIGHT WING PLAN 3/TA LIUSIUT Type RC glider Wingspan 60 inches Number channels Two Flying weight 15 ounces Construction balsa Covering/finish AeroGloss Balsa Fillercoat Coverite Glaskote MonoKote trim Top skin attached 30-minute epoxy spar trailing edge tips aliphatic resin glue ribs LE Barnabusjyaft Continued paqe 18 longeron notches round holes will need sharp razor blade Note two F3A formers glued front back F3 drilled 1/ birch wing dowel assure straight fuselage pin 3A6-square balsa guides top view fuselage plan place fuselage sides between glue formers gap-filling CyA Mark bottom fuselage cover 142 plywood Cut out sharp scissors glue place CyA Likewise mark bottom rear fuselage cover light 146 balsa cut out grain lengthwise glue place CyA Use CyA attach F6 top bottom plywood cover well 045 wire towhook /16 plywood finger hole also glued bottom A2 ply wood bottom CyA Cut balsa nose block shape glue place Drill tap plywood former F8 receive 8-32 nylon wing bolt gives strong snug wing hold-down out use flaky blind mounting nut RADIO INSTALLATION Install microservos servo-mounting tape attaching securely both bot tom sides fuselage shown plans After placing battery pack microreceiver position install #507 Sullivan control rod sheaths making certain glue fuselage sides several places prevent buckling Make Z bends control rods hook up servos strengthen running coat solder rods about six inches past bends gives snug light weight slop-free connection Place control rods sheaths hook control rods servos Attach rudder control rod outer servo arm hole elevator control rod innermost servo arm hole gives maximum rudder movement mini mum elevator movement control rods sheaths exit fuselage rear cut exact length until after tail has installed TAIL Cut fin rudder stab elevator very light A2 sheet sand edges round install #RK 2-7 Klett hinges trimmed A2 ends hinge save weight make installation easier Glue tail fuselage CyA attach smallest control horns can lo cate cant locate small enough make own 146 plywood Cut control rod sheaths control rods proper length attach #507 Sullivan devises leaving room final adjustments screwing out Adjust throw give 1 inches rudder elevator way Glue receiver antenna tube glue 146 balsa top rear fuselage cover grain running crosswise Carve front fuselage hatch soft balsa glue 045 wire front hold-down rear hold-down small servo screw former F3 rear portion hatch glued wing COVERING/PAINTING original given two coats AeroGloss Balsa Fillercoat sanded 400-grit paper after coat coat Coverite Glaskote gives light glossy finish MonoKote trim can applied Other coverings may used weight should considered Litespan lightest available Charlies R/C Goodies 2828 Cochran Street Suite 281 Simi Valley CA 93065 Tel 805 581-5061 Coverites Micafllm next lightest come other popular iron-ons such MonoKote UltraCote etc Use arent too concerned about weight FLYING important part preflight preparation properly locating center gravity Make certain model bal ances exactly 2/s inches leading edge wing will probably have add least ounce lead nose achieve balance point Continued page 134 74 Model Aviation
Edition: Model Aviation - 1993/09
Page Numbers: 16, 17, 18, 74
HE ORIGINAL BARNABUS all- balsa V-dihedral 18-inchspan Outdoor Hand-Launched Glider designed 1952 flew surprisingly well very stable thermals won its share contests summer fall 1952 1953 Barnabus flown Bob Barney AMA National Record 12 minutes 124 seconds salt flats near Salt Lake City Utah design has since won scores contests throughout western US won first OHLG Rocket 1968 Nationals 1975 Utah State Aeromodelers organized free flight competition three-man teams beautiful Free Flight Team Cup perpetual trophy Taft Thermaleers team quickly formed consisting Barney Chris Mike Taft fleet Barnabus gliders combination retired coveted Team Cup winning four consecutive years After 1981 move Rancho Mirage California aging Taft Thermaleers couldnt resist radio control soon built flew several RC models sons Chris Mike Cory constantly pressing build RC Barnabus hand-launched glider quickly caved retired drawing board After scaling up original model 60-inch-span two-channel monster three slightly different designs built flown improvements made needed final version soon specking out good air fairly consistent basis Top all-sheet Barnabus floats Above Author demonstrates proper launch technique wind wings level nose up wingspan maximum allowed AMA rules RC HLG results wing area 464 square inches airfoil highly touted 5D7037 Its low drag allows good speed range gives high launches its slight undercamber gives excellent thermaling ability light lift ample V dihedral slight washout wingtip seems provide good stability strong thermals tight turns 16 Model Aviation TRUCTION YOU afflicted am foamo phobia fear foam vacubagophobia fear vacuum-bagging Barnabuss construction wing uses standard balsa construction 2 light balsa skins top bottom medium balsa spars have /i6 sheet balsa shear webs 007 carbon fiber strip reinforcements trailing edge tips have 007 X /2 carbon fiber strips sand wiched between top bottom skins giving super-sharp trailing edge very strong wingtips Order 007 carbon fiber strip Aerospace Composite Products PO Box 16621 Irvine CA 92714 Tel 714 250-1107 will need about five feet one-inch strip #CLl WING Make top bottom skins very light A2 x 3 x 36 balsa sheets best wood available Champion Model Products 880 Carmen Court La Verne CA 91750 Tel 714 599-3348 Proper wood selection can reduce finished weight model fifty percent Use aluminum ruler true edges sheets tight butt-fit joints Run strip masking tape along side joint turn sheets over open hinge run thin bead aliphatic resin AR glue along joint Wipe off excess glue damp rag cover waxed paper weight books fiat surface allow dry about hour Remove weights waxed paper turn skins over remove masking tape being careful remove part skins Cut cardboard wingtip pattern use pencil mark tip locations skins Cut tips shape pair sharp scissors Use #2 pencil straightedge drafting triangle mark spar rib locations top bottom skins After sanding 3A2 x 3 wing shim tack-glue plan rubber cement Pin 3/4 x i6 trailing-edge-stock shim place Place waxed paper over both shims pin bottom skins plan making certain pencil-marked spar rib locations facing up Glue 007 x 1 carbon fiber reinforce ment strips inner 14 inches wing spar 5-minute epoxy bottom spar attached skin 5-minute epoxy carbon-reinforced area AR glue outer portion Now glue Rl ribs AR pin ning necessary get good bond undercambered portion Phillips entry part leading edge Now glue wingtip ribs R2 R3 R4 Use sharp scissors cut trailing edge wingtips 007 x 1 carbon fiber strip glue place bottom skins 5-minute epoxy dry care fully sand trailing edge wingtips sharp edges will take much sanding because 007 less /I2s inch Slide shims 81 S2 under wingtips slide x out shims place top shims 81 S2 Cut sand leading edge shape glue strip /i6 x 5/~ balsa rear leading edge forming shelves top bottom skins Glue leading edge place AR glue making certain bottom skin flush its shelf A6 balsa shear webs between Ri ribs attached cyanoacrylate CyA glue Add top spar AR glue use 5-minute epoxy glue -inch sheet balsa wingtip leading edges top carbon fiber strips September 1993 17 Barnabus ready hi-start launch author believes best initial test flights Taft Thermaleers free flight team L Fl Mike barney Chris Taft original Barnabus hand-launched gliders Thermaleers retired Utah State Aeromodelers Team Cup center after consecutive wins 1975-78 Top view shows slim fuselage 464-square-inch wing Elliptical tips popular early 1950s original Barnabus HIG designed After wing skins have glued together rib spar locations tip outlines marked bottom skin Full Size Plans AvailableSee Page 176 AlA 005 CARBON FIBER STRIP V LEFT WING PLAN ASS VEST /CRT/NVBBO Alt5 1/A BASSO STIR 53 PLACES OR TSP AR 5-SVS B-B TO BUlLS WASHOUT SACR TIPSVSBLITE BALSA HOEF P FROM HOTiVBH I/HI/I IIL IN RURH RH II ILIZER IIIrII IIIJIIIJIII SIALL NOITN OHOLi VIT%%F5II2 RIBA TIP LE SB ITSALLOVAS CUBLONSAEUThS BALSA HO TAR OP THOPIERS S CLEVIS3/SASS/B CARGO FIBER BTRIP -II7 ]jSOHOCE II\II ii K BASEMENTL tWOI/SUP RHOOEn RINSE EHOHTR VA RU B LTREP MAO LBS ITRBRTII\I 41BOOS 0 R-4 PRATE SOT CARRElR-2 IIIINOTE ALL 51ST RIBO ARE onPIE S RUSHER 148 I540 LITO BALSA IIBTRDBA ISNEET IU I/B BALSAAl-ll-l- BAREISA VATLTRIBS F 3ANTIS R/AWING OETAILtF1S11 T/AS R SALSU LIlTILC7--------j/---4 HISS SPAS00 F IF 2F 3 SATCHF-7F-BOIBA URSAAAR TO IS SAN RITE-RAE03255142 BOLTC2U/I" uSC PLCWINS ITARIRS08 50 US SAUCNPTDIHEDRAL BRACESISP SACSAIRHOIL50 TORT PACRl05% /4 BALSA LSSAERS [2 LLT ITCS~Th -- -if I/TBPLT TBREHOUS -___________ FlTSRRIOTSI ACOTONAIOBAR /SIDE VIEWUS BALSA SIRES SERVOPSP-S TAUVEEpFUSELAGE BALSABOTTOMFH I I/ROT ERHO55I/IS RI/UBOTTOM ORHIR BLOTS I SHOJCECR BALSA RREETRAIRALENSTII -WIRE T1R/RITEN SIA30 1111 MODEL AVIATION oo W BATS HOVESSRTCSFISHER HOLEUSA PRO SR/BIERFUSELAGEyr SHOTPROM SERE PHOTBATOBARNABUS I/IBLIUS BALSA POSE SITE -PULL IERHURSERISSER RT RuSSET TAFT FUSELAGE LER PATTERN lURES PLAN BY AGE 05MAR05 tt7ALL ROOTS RERERVESMA PLAN Glue dihedral gussets half wing AR using clothespins hold place Allow dry thoroughly Attach top skin follows Apply 30minute epoxy 007 carbon-fiber tailing edge wingtips top spar reinforcements Now apply AR glue liberally aH ribs Wing construction progress Note 007 carbon-fiber strips trailing edge viingtips spar centers balsa portion top spar balsa portion wingtip leading edge Position top skin pin down leading edge care fully fit skin shelf weight skin several thick magazines get good bond rib Use several clothespins hold wingtips tightly together until thoroughly dry Glue wing halves together AR blocking up tip five inches dry lightly sand wing 400-grit paper very careful sand through skins Glue plywood reinforcement F7 top wing drill 8-32 nylon bolt Drill leading edge wing 1/8 birch dowel glue place CyA FUSELAGE Using pattern shown plans cut two fuselage sides V16 light balsa two doublers / plywood Sharp scissors work fine task quicker using modeling knives Attach doublers fuselage sides AR glue making certain have right left Place waxed paper top weight down books allow dry thoroughly Attach A6 x a longerons AR glue weight down books allow dry cut formers Again sharp scissors work fine except Continued page 74 18 Model Aviation LS BALSA V iTSS S/15 BET RULSA SUB-IE SUE TT ALLOW FOR ITO TSP S RIGHT WING PLAN 3/TA LIUSIUT Type RC glider Wingspan 60 inches Number channels Two Flying weight 15 ounces Construction balsa Covering/finish AeroGloss Balsa Fillercoat Coverite Glaskote MonoKote trim Top skin attached 30-minute epoxy spar trailing edge tips aliphatic resin glue ribs LE Barnabusjyaft Continued paqe 18 longeron notches round holes will need sharp razor blade Note two F3A formers glued front back F3 drilled 1/ birch wing dowel assure straight fuselage pin 3A6-square balsa guides top view fuselage plan place fuselage sides between glue formers gap-filling CyA Mark bottom fuselage cover 142 plywood Cut out sharp scissors glue place CyA Likewise mark bottom rear fuselage cover light 146 balsa cut out grain lengthwise glue place CyA Use CyA attach F6 top bottom plywood cover well 045 wire towhook /16 plywood finger hole also glued bottom A2 ply wood bottom CyA Cut balsa nose block shape glue place Drill tap plywood former F8 receive 8-32 nylon wing bolt gives strong snug wing hold-down out use flaky blind mounting nut RADIO INSTALLATION Install microservos servo-mounting tape attaching securely both bot tom sides fuselage shown plans After placing battery pack microreceiver position install #507 Sullivan control rod sheaths making certain glue fuselage sides several places prevent buckling Make Z bends control rods hook up servos strengthen running coat solder rods about six inches past bends gives snug light weight slop-free connection Place control rods sheaths hook control rods servos Attach rudder control rod outer servo arm hole elevator control rod innermost servo arm hole gives maximum rudder movement mini mum elevator movement control rods sheaths exit fuselage rear cut exact length until after tail has installed TAIL Cut fin rudder stab elevator very light A2 sheet sand edges round install #RK 2-7 Klett hinges trimmed A2 ends hinge save weight make installation easier Glue tail fuselage CyA attach smallest control horns can lo cate cant locate small enough make own 146 plywood Cut control rod sheaths control rods proper length attach #507 Sullivan devises leaving room final adjustments screwing out Adjust throw give 1 inches rudder elevator way Glue receiver antenna tube glue 146 balsa top rear fuselage cover grain running crosswise Carve front fuselage hatch soft balsa glue 045 wire front hold-down rear hold-down small servo screw former F3 rear portion hatch glued wing COVERING/PAINTING original given two coats AeroGloss Balsa Fillercoat sanded 400-grit paper after coat coat Coverite Glaskote gives light glossy finish MonoKote trim can applied Other coverings may used weight should considered Litespan lightest available Charlies R/C Goodies 2828 Cochran Street Suite 281 Simi Valley CA 93065 Tel 805 581-5061 Coverites Micafllm next lightest come other popular iron-ons such MonoKote UltraCote etc Use arent too concerned about weight FLYING important part preflight preparation properly locating center gravity Make certain model bal ances exactly 2/s inches leading edge wing will probably have add least ounce lead nose achieve balance point Continued page 134 74 Model Aviation