TUCKED AWAY hangars Antique Airplane Association Museum Ottumwa Iowa little 60-year-old biplane jaunty gogo looks belie its age Jack W Rose designed built eleven Rose Parrakeets between 1931 beginning World War II Rose wanted manufacture sell airplanes poured lot money effort getting CAA Approved Type Certificate really fine sporting aircraft nimble outstandingly aerobatic mount stressed nine negative Gs low wing loading nearly symmetrical airfoil could take off land fifty yards Flyaway cost Chicago $1475 $975 less engine mid-1930s Plans Parrakeet made available late 1950s about $100 least example creamy yellow black trim built Richard Borg California stand presence such craft did fall 1993 want very own 50 Model Aviation k Beatty Bjorn Karlstriims three views April 1972 American Aircraft Modeler used prepare working drawings Parrakeet Two additional three-views lengthy photo-spread articles colored centerfolds Sport Flying June 1969 April 1970 Air Progress May 1969 Bob Banka Scale Model Research Foto-Paaks plane #1347 Continental A-40 Engine #436 contributed some measure painting detailing model model attempts follow Karlstrtims drawings depict aircraft its 1936 form However over years surviving Parrakeets have modified ways powerful engines cowlings suit low-pressure donut-type wheels tail wheels navigational light systems have fitted Variations windshields cockpit coamings wing walks etc rife model would probably classified Sport Scale Category because composite markings additional details taken several different planes sources listed above significant change must mentioned Close examination two other three-views dead-on side-view photos several planes indicated noticeably longer noses shown Karlstriims drawings Since easier balance model longer nose opted lengthen nose about inch shorten tail about inch modeler should conduct own research use findings build model suit particular goals Mr Karlstrom s drawings scaled up four times original size build model scale 21/4 inches foot model has 45-inch wingspan 35-inch lengtha nearly ideal size just does shoehorn four-door sedan Wing area 590 square inches weight 69 ounces wing loading 117 ounces per 100 square inches wing area power K&B Green Head 45 RC oldie goodie Roberts three-wire system operates throtfie CONSTRUCTION toughest problem contemplate building biplanes finish/assembly/alignment sequence goal biplane able dope rub down major components separately cement finished parts predrilled locator holes will automatically align wings tail feathers during final assembly construction straightforward sequence construction can important some instances Fuselage Make up two fuselage side frames top other same way did old-time free flight fuselages maximum accuracy frame duplication Cement bulkheads 24 7 place true up assembly establish basic box eveiything hangs add bulkheads 8-13 Bind cabane strut wires bulkheads 2 4 Tack-cement cabane strut alignment templates fuselage longerons between bulkheads 2 4 Slide small washers onto strut end Make up predrilled 3/ x 3/4 x 7 temporary dummy spars Insert four strut ends proper holes guide spars slots templates Center spars cement templates Now diagonal cabane struts can bent up soldered position soft copper wire bindings four washers soldered struts dummy spars meet upper wing center section location will accurately fixed dummy spar/template assembly can now removed Bind cement undercarriage struts position epoxy thread engine mounts suspended Roberts bellcrank leadouts next Note 1/ plywood engine mount gusset has interesting little tab pierces firewall /s diameter dowel cemented through tab really locks assembly together Bolt engine make up throttle throw linkage assembly install sure operates freely before moving Install fuel tank lower wing spar support boxes basswood rigging wire locator blocks various formers fuselage station /16 x 1/g bass stringers 1/4 sheet balsa fairing blocks nose tail /s balsa planking cowling made up one-inch-thick balsa sheet segments glued up shaped hollowed out required various balsa fairings can applied cabane undercarriage struts before assembly set aside Wings Make up laminated bass wingtips obtaining 24-inch length 3/4-inch PVC pipe two end cap fittings Cement end cap onto end pipe fill clear household ammonia Insert four /16 x 1/4 x 14 strips basswood pipe cap off allow soak hour Bind strips /4 plywood form allow dry overnight strips dry cover cement bind once again form allow dry overnight four times eureka four laminated basswood wingtips Ribs quickiy accurately made March 1995 51 Completed framework Rose Parrakeet uses built-up wing spars capstripped ribs help save weight Fuselage progress Power plant original K&B Green Head 45 mounted Ia x I2 maple bearers sandwiching 38 /16 sheet balsa rectangles between two 1/16 sheet aluminum master templates shaving sanding excess wood away Tape leading- tralling-edge timbers wing together four-inch Dremel table saw will accurately cut notches ribs Use balsa shims block up leading trailing edges wing required before cementing ribs notch Measure trim cement laminated tips position concerned small gluing surface junction hardwood-to-balsa joints might fail hard upset opted install /32 sheet balsa web area tip Consider web optional omit such abuse likely occur model under stewardship starboard upper wing web makes good mounting platform outboard wingtip weight Complete top wing center section lower wing center section stubs attention can turned I-beam spars 1/16 x /I6 basswood spar flanges can located cemented appropriate notches still pinned building board Lift assemblies board flip over shim pin down again /16 basswood rectangles will cemented atop spar flange strut location /16 basswood spar stabs will also located time balance spaces will filled 1/16 sheet balsa rectangles purist would have vertical grain Apply top 1/16 X /16 basswood spar flange create light-but-strong Ibeam-type spar Make false ribs cement position 1/16 x 1/ balsa capstrips can now applied both sides ribs false ribs aileron assemblies built-up mated lower wing dead-on accurate fit Drill 1/16 diameter holes strut rigging wire location Plane carve sand wing final shape separate ailerons lower wing Bring spars strut location level capstrips /16 basswood filler pieces set wings aside Tail surfaces 1/16 x /16 laminated basswood tail-surface frames formed using same techniques created wingtips completed assemblies weigh about 11/2 ounces though frames ribs made hardwood Drill frames accept Robart #308 hinges Rudder offset aileron settings will locked position final assembly application Zap cyanoacrylare CyA glue hinges Preliminary fitting Make up two interplane strut templates Slide lower wing spars fuselage spar support boxes Settle upper wing onto cabane struts Position interplane strut templates between wings strut locations Tape assembly together check spacing alignment surfaces satisfied /16 diameter predrilled strut location holes will allow make up 3/M diameter wire interplane strut assemblies Solder brass line guide port strut assembly fit interplane struts balsa fairings important fairing end close fit spar mates assembly can dismantled struts will automatically align top wing during future fittings found struts exactly matched strut drawings template-fitting exercise may unnecessary accurate craftsman Soft copper wire can wrapped soldered strut ends widely spaced coils Enlarge 1/16 diameter predrilled strut locator holes /32 diameter cautious builder might reassemble check fit alignment parts has changed shouldnt forget make up fit diagonal strut braces flexible wire kept splitting soft balsa fairings refit struts basswood fairings solved problem Check alignment tail feathers fin permanently glued fuselage consider advantageous cover finish mask off fuselage striping prior installing stabilizer set aside installed later Covering painting Before covering Continued page 60 52 Model Aviation inental A-40 cylinder details assembly weighs 214 ounces reducing total ballast added nose Ready rolil Author feels Parrakeet has sassy go-go look Original model weighed 69 ounces Type CL Sport Scale Wingspan 45 inches Engine K&B Green Head 45 glow Flying weight 69 ounces Construction Built-up Covering/finish Silk dope Rose ParrakeetlBeatty Continued page 52 model break round off corners hardwood stringers other hardwood members reduce possibility sharp hard corners cutting through covering material during finishing components including struts covered silk Prick pinhole covering predrilled strut rigging wire locator hole will lost under coats paint come Use favorite method finish model used four six coats brushed clear dope followed eight thinned spray filler coats followed eight thin sprayed color coats wet-or-dry sanding thrown two three coats final gloss finish achieved medium grade rubbing compound Take easy sanding rubbing because can easily cut through fabric too hamhanded Give model thorough cleaning soap water trim achieved combination masking tape stencils color scheme markings instrument panel layout derived photos May 1969 Air Progress Final assembly Details like instrument panel windshield leather cockpit padding wing walks should added time Install lower wings cementing spar stubs spar support boxes Coat lower interplane stint ends epoxy mate lower wings Make ajig help locate align rigging wires diagonal strut braces Take two lengths /4 x /2 x 32 spruce drill /32 diameter holes match upper wing strut/rigging locator holes Slide dummy spars position models cabane interplane struts Now rigging wires diagonal strut braces can located epoxied fuselage lower wings correct angles mate upper wing Let dry overnight before removing dummy spars now have fourteen floppy rigging wire strut ends butter epoxy slide proper holes upper winga dicey potentially messy job man pressed son-in-law George grandson Eric service went smoothly six hands Tape assembly check alignment final time allow dry overnight Install stabilizer/elevator unit solder push-rod connection ailerons rudder attached Robart hinges hinges CyAed about 3/ offset rudder ailerons deflected /16 U starboard /16 down port maintain line tension flying Neat scalelike rigging wire fittings can fabricated brass tubing drawings explain installation About left dummy engine cylinders Early realized ballast would required nose Accordingly cylinders purposely made heavy durable materials like plywood metal tubing weighed 41/2 ounces An additional four ounces added models nose have scroll saw can stack saw kind part time will speed things up assure uniformity After unit made up cavity must carved cowl accept cylinders base should have done before cowling palnted hadnt acquired decent documentation draw cylinders time works carefully though its really much problem operation saved last Flying model has good configuration CL flying wheels large widely spaced located well forward good ground handling model has fairly light wing loading ample power has aerobatic potential kept light contestwinning potential detail finish piled scale semisymmetrical alrfoil can provide some stunt capability weight carefully monitored managed Build finish suit own inclinations fly model unless balanced forward center gravity CG location noted drawings Enjoy ASHEETS 3648 I/32x23344 1/16x23344 3/32x24053 I/S x24357 3/16x25065 114 o26079 3/8 x 230 42 78105 1/2 x295125 1/32x333 45 3953 1/20x333 45 3953 1/16o333 45 3953 3/32x 339 54 4760 1/8 347 65 5775 3/16x355 75 6890 1/4 x370 100 85115 5/16o398135 3/8 x395 130 102150 1/2 x3115 155 135180 3/4 x3199270 1/32 x 450 70 5979 1/20x450 70 5979 1/16u450 70 5979 3/32o 459 90 7398 1/8 x468 100 83115 3/16o478 120 97135 1/4 x495 136 135155 5/16x4162203 3/8 x4145 214 185247 1/2 x4209 270 249290 WINGSKINS 3836 1/2Ox 12479535 1/ito 12479535 3/32x 12579645 MATCHED SHEETS 4248 3/32x4109125 1/8 x4129148 3/16x4144165 1/4 x4155178 SEND $100 FOR COMPLETE CATALOG BALSA STICKS 1/16 50 1/16x 1/4 1/16x3/8 1/16 o 1/2 3/32S0 3/32 xl/4 3/32x3/8 3/32 ol/2 1/8 60 1/8x 1/4 1/8x3/8 1/8ol/2 3/16 SQ 3/16 ol/4 3/16x3/8 3/16 xI/2 3/16x3/4 3/16xl 1/4 SO 1/4x3/8 1/41/2 1/4x3/4 1/411 5/16 SO 3/8 SO 3/8 oI/2 3/8x3/4 3/8xl 1/2SO 1/2x3/4 1/2xl 5/8 SO 3/4 SO TRAILING EDGE 1/8 xl/2 3/16 x3/4 1/4xl 5/16 x 1-1/14 3/8o11/2 1/2x2 1/4x2 1/4x3 3/8x2 3/8x3 1/2o3 3848 10 10 11 15 09 12 13 17 09 1218 1319 1824 1219 1826 1826 2231 2642 3752 1926 2329 2535 3650 4567 2330 3039 3549 4658 5575 4255 5270 6589 5575 7598 36 25 30 35 45 49 79 65 95 79 115 135 BUNDLEIIEAL 36 201/16x 3699 201/16x41035 203/32x 3875 153/32x4999 IS1/8x 3775 10I/8o4775 153/16x3940 103/16o4899 11011/4x3765 101/4x41285 1103/8x3920 53/8x4835 51/2o3605 5 1/2x4IlSO BUNDLEDEALS48 103/32x4950 51/8o4550 5 3/164650 5 1/4s4735 BALSASHEETS UGHT 4-6LB3648 I/32x378119 1/20x378119 1/I6x378119 3/32s393144 1/8 x3114175 3/16x3132202 1/4 x3157237 3/8 x3168307 1/2 x 3236382 3/4 r3375519 1 3532719 1/3214123168 1/20x4123168 1/16x4123168 3/32x4149232 1/8 x4169262 3/16x4197300 1/4 x 4237332 3/8 x 4357563 1/2 x4482668 ALL 4-8 LB WOOD SUBJECT TO AVAILABILITY D rLn onnnl 12 24 48 3/32x 6120225430 3/32x12225430750 1/8x6125245475 1/8x 12245475835 1/4x 6105215345 1/4x 12215345650 3/8o6130240450 3/8x 12240475850 1/2x 6175295490 1/2x 12295495970 SUPERIORUTE 24 48 1/8o6215345 1/8x12345650 LITE PLY12 24 48 1/8x675110175 1/8x12110100350 1/4x695155275 1/412155295550 2mm & 25mm same pdce 1/8 3 PLY BIRCH 122448 l/64x6 125235439 1/64012 235439850 1/32o6 95159299 1/32x 12 180299550 1/16x6 95159299 1/16x 12 180299550 1/8 x6 95159299 1/8 o12 180299550 4 PLY BIRCH 122448 3/16x 6109 215 315 3/16x 12215 345 625 HARD MAPLE 18 1/4x1/440 1/4x3/845 1/4x1/250 3/8x3/845 3/8x1/250 3/8x3/458 3/8x165 HARD MAPLE 3/8xI1/2 98 1/2ol/2 65 I/2x3/4 68 5/8x3/4 75 3/413/4 82 GROOVED LO MOUNTS 12 3/8x3/41/845 3/8 x3/45/3245 1/2x3/43/1650 SPRUCE/BASS3648 1/16ol/42433 3/32xl/42626 1/8SO 25 1/811/4ij2026 1/8x3/82232 1/8xl/23040 1/8o3/44255 3/16S02836 3/16x3/83344 3/16xI/2W4357 3/16x3/4Ns74 1/4603450 1/4x3/84058 1/4xl/2I4565 1/4x3/4P7093 3/860.4969 3/8xl/26077 1/2SO 90 1/3x3/475100 SPRUCE TRIANGLES36 3/8o3/847 1/201/264 3/4o 1/481 BIRCH DOWELS36 1/814 3/1617 1/419 5/1625 3/835 1/4xl/4 3/8x3/8 1/2ol/2 3/4x3/4 1xl 11/2x 1-1/2 2o2 AILERONS36 1/4xl 1/4o11/4 1/411-1/2 1/4x2 5/16x 1-1/4 5/16o 1-1/2 5/16x2 3/8ol-1/4 3/8xl-1/2 3/8o2 1/2oI-l/2 1/2x2 EPOXY 5 Minute 15 Minute 30 Minute 2 Hour 26 Minute INSTANT GLUE 1/2 ox Thin OF 1 oz Thin OF 2ozThinorGF 8 xz Thin OF t/2 oz Extra Thick 1 ox Extra TWicl 2 ox Extra Thick 8 xz Extra Thick QDO8LE8iEQ&EQAM 1/2 ox Thin OF t oz Thin OF 2 ox Thin OF 2 ox Accelerator 10 ox Acc Refltt 3 ox Acc No Freon 10 oz ACC REF No Frexn 1 oz Dehonder 36 25 30 35 49 68 115 195 48 4868 5575 62 87 68 95 6287 6489 7299 6896 7097 79110 80115 90125 4-1/2OZ902 425669 425669 425669 425869 429840 105 300 550 1650 200 338 606 1800 365 665 1200 375 925 315 750 199 INFO & HELP ORDERS ONLY 24 HR FAX SEND MAIL LONE STAR MODELS x TsS ux o 0wxod 100806-745-8394 1-800-687-5555 806-745-6483 ORDERS TO RI 9 Box 437 Lubbock TX 79423 60 Model Aviation EST SELECTION AAA UKADE CONTEST BALSA SATISFACTION GUARANTEED PED 100%
Edition: Model Aviation - 1995/03
Page Numbers: 50, 51, 52, 60
Edition: Model Aviation - 1995/03
Page Numbers: 50, 51, 52, 60
TUCKED AWAY hangars Antique Airplane Association Museum Ottumwa Iowa little 60-year-old biplane jaunty gogo looks belie its age Jack W Rose designed built eleven Rose Parrakeets between 1931 beginning World War II Rose wanted manufacture sell airplanes poured lot money effort getting CAA Approved Type Certificate really fine sporting aircraft nimble outstandingly aerobatic mount stressed nine negative Gs low wing loading nearly symmetrical airfoil could take off land fifty yards Flyaway cost Chicago $1475 $975 less engine mid-1930s Plans Parrakeet made available late 1950s about $100 least example creamy yellow black trim built Richard Borg California stand presence such craft did fall 1993 want very own 50 Model Aviation k Beatty Bjorn Karlstriims three views April 1972 American Aircraft Modeler used prepare working drawings Parrakeet Two additional three-views lengthy photo-spread articles colored centerfolds Sport Flying June 1969 April 1970 Air Progress May 1969 Bob Banka Scale Model Research Foto-Paaks plane #1347 Continental A-40 Engine #436 contributed some measure painting detailing model model attempts follow Karlstrtims drawings depict aircraft its 1936 form However over years surviving Parrakeets have modified ways powerful engines cowlings suit low-pressure donut-type wheels tail wheels navigational light systems have fitted Variations windshields cockpit coamings wing walks etc rife model would probably classified Sport Scale Category because composite markings additional details taken several different planes sources listed above significant change must mentioned Close examination two other three-views dead-on side-view photos several planes indicated noticeably longer noses shown Karlstriims drawings Since easier balance model longer nose opted lengthen nose about inch shorten tail about inch modeler should conduct own research use findings build model suit particular goals Mr Karlstrom s drawings scaled up four times original size build model scale 21/4 inches foot model has 45-inch wingspan 35-inch lengtha nearly ideal size just does shoehorn four-door sedan Wing area 590 square inches weight 69 ounces wing loading 117 ounces per 100 square inches wing area power K&B Green Head 45 RC oldie goodie Roberts three-wire system operates throtfie CONSTRUCTION toughest problem contemplate building biplanes finish/assembly/alignment sequence goal biplane able dope rub down major components separately cement finished parts predrilled locator holes will automatically align wings tail feathers during final assembly construction straightforward sequence construction can important some instances Fuselage Make up two fuselage side frames top other same way did old-time free flight fuselages maximum accuracy frame duplication Cement bulkheads 24 7 place true up assembly establish basic box eveiything hangs add bulkheads 8-13 Bind cabane strut wires bulkheads 2 4 Tack-cement cabane strut alignment templates fuselage longerons between bulkheads 2 4 Slide small washers onto strut end Make up predrilled 3/ x 3/4 x 7 temporary dummy spars Insert four strut ends proper holes guide spars slots templates Center spars cement templates Now diagonal cabane struts can bent up soldered position soft copper wire bindings four washers soldered struts dummy spars meet upper wing center section location will accurately fixed dummy spar/template assembly can now removed Bind cement undercarriage struts position epoxy thread engine mounts suspended Roberts bellcrank leadouts next Note 1/ plywood engine mount gusset has interesting little tab pierces firewall /s diameter dowel cemented through tab really locks assembly together Bolt engine make up throttle throw linkage assembly install sure operates freely before moving Install fuel tank lower wing spar support boxes basswood rigging wire locator blocks various formers fuselage station /16 x 1/g bass stringers 1/4 sheet balsa fairing blocks nose tail /s balsa planking cowling made up one-inch-thick balsa sheet segments glued up shaped hollowed out required various balsa fairings can applied cabane undercarriage struts before assembly set aside Wings Make up laminated bass wingtips obtaining 24-inch length 3/4-inch PVC pipe two end cap fittings Cement end cap onto end pipe fill clear household ammonia Insert four /16 x 1/4 x 14 strips basswood pipe cap off allow soak hour Bind strips /4 plywood form allow dry overnight strips dry cover cement bind once again form allow dry overnight four times eureka four laminated basswood wingtips Ribs quickiy accurately made March 1995 51 Completed framework Rose Parrakeet uses built-up wing spars capstripped ribs help save weight Fuselage progress Power plant original K&B Green Head 45 mounted Ia x I2 maple bearers sandwiching 38 /16 sheet balsa rectangles between two 1/16 sheet aluminum master templates shaving sanding excess wood away Tape leading- tralling-edge timbers wing together four-inch Dremel table saw will accurately cut notches ribs Use balsa shims block up leading trailing edges wing required before cementing ribs notch Measure trim cement laminated tips position concerned small gluing surface junction hardwood-to-balsa joints might fail hard upset opted install /32 sheet balsa web area tip Consider web optional omit such abuse likely occur model under stewardship starboard upper wing web makes good mounting platform outboard wingtip weight Complete top wing center section lower wing center section stubs attention can turned I-beam spars 1/16 x /I6 basswood spar flanges can located cemented appropriate notches still pinned building board Lift assemblies board flip over shim pin down again /16 basswood rectangles will cemented atop spar flange strut location /16 basswood spar stabs will also located time balance spaces will filled 1/16 sheet balsa rectangles purist would have vertical grain Apply top 1/16 X /16 basswood spar flange create light-but-strong Ibeam-type spar Make false ribs cement position 1/16 x 1/ balsa capstrips can now applied both sides ribs false ribs aileron assemblies built-up mated lower wing dead-on accurate fit Drill 1/16 diameter holes strut rigging wire location Plane carve sand wing final shape separate ailerons lower wing Bring spars strut location level capstrips /16 basswood filler pieces set wings aside Tail surfaces 1/16 x /16 laminated basswood tail-surface frames formed using same techniques created wingtips completed assemblies weigh about 11/2 ounces though frames ribs made hardwood Drill frames accept Robart #308 hinges Rudder offset aileron settings will locked position final assembly application Zap cyanoacrylare CyA glue hinges Preliminary fitting Make up two interplane strut templates Slide lower wing spars fuselage spar support boxes Settle upper wing onto cabane struts Position interplane strut templates between wings strut locations Tape assembly together check spacing alignment surfaces satisfied /16 diameter predrilled strut location holes will allow make up 3/M diameter wire interplane strut assemblies Solder brass line guide port strut assembly fit interplane struts balsa fairings important fairing end close fit spar mates assembly can dismantled struts will automatically align top wing during future fittings found struts exactly matched strut drawings template-fitting exercise may unnecessary accurate craftsman Soft copper wire can wrapped soldered strut ends widely spaced coils Enlarge 1/16 diameter predrilled strut locator holes /32 diameter cautious builder might reassemble check fit alignment parts has changed shouldnt forget make up fit diagonal strut braces flexible wire kept splitting soft balsa fairings refit struts basswood fairings solved problem Check alignment tail feathers fin permanently glued fuselage consider advantageous cover finish mask off fuselage striping prior installing stabilizer set aside installed later Covering painting Before covering Continued page 60 52 Model Aviation inental A-40 cylinder details assembly weighs 214 ounces reducing total ballast added nose Ready rolil Author feels Parrakeet has sassy go-go look Original model weighed 69 ounces Type CL Sport Scale Wingspan 45 inches Engine K&B Green Head 45 glow Flying weight 69 ounces Construction Built-up Covering/finish Silk dope Rose ParrakeetlBeatty Continued page 52 model break round off corners hardwood stringers other hardwood members reduce possibility sharp hard corners cutting through covering material during finishing components including struts covered silk Prick pinhole covering predrilled strut rigging wire locator hole will lost under coats paint come Use favorite method finish model used four six coats brushed clear dope followed eight thinned spray filler coats followed eight thin sprayed color coats wet-or-dry sanding thrown two three coats final gloss finish achieved medium grade rubbing compound Take easy sanding rubbing because can easily cut through fabric too hamhanded Give model thorough cleaning soap water trim achieved combination masking tape stencils color scheme markings instrument panel layout derived photos May 1969 Air Progress Final assembly Details like instrument panel windshield leather cockpit padding wing walks should added time Install lower wings cementing spar stubs spar support boxes Coat lower interplane stint ends epoxy mate lower wings Make ajig help locate align rigging wires diagonal strut braces Take two lengths /4 x /2 x 32 spruce drill /32 diameter holes match upper wing strut/rigging locator holes Slide dummy spars position models cabane interplane struts Now rigging wires diagonal strut braces can located epoxied fuselage lower wings correct angles mate upper wing Let dry overnight before removing dummy spars now have fourteen floppy rigging wire strut ends butter epoxy slide proper holes upper winga dicey potentially messy job man pressed son-in-law George grandson Eric service went smoothly six hands Tape assembly check alignment final time allow dry overnight Install stabilizer/elevator unit solder push-rod connection ailerons rudder attached Robart hinges hinges CyAed about 3/ offset rudder ailerons deflected /16 U starboard /16 down port maintain line tension flying Neat scalelike rigging wire fittings can fabricated brass tubing drawings explain installation About left dummy engine cylinders Early realized ballast would required nose Accordingly cylinders purposely made heavy durable materials like plywood metal tubing weighed 41/2 ounces An additional four ounces added models nose have scroll saw can stack saw kind part time will speed things up assure uniformity After unit made up cavity must carved cowl accept cylinders base should have done before cowling palnted hadnt acquired decent documentation draw cylinders time works carefully though its really much problem operation saved last Flying model has good configuration CL flying wheels large widely spaced located well forward good ground handling model has fairly light wing loading ample power has aerobatic potential kept light contestwinning potential detail finish piled scale semisymmetrical alrfoil can provide some stunt capability weight carefully monitored managed Build finish suit own inclinations fly model unless balanced forward center gravity CG location noted drawings Enjoy ASHEETS 3648 I/32x23344 1/16x23344 3/32x24053 I/S x24357 3/16x25065 114 o26079 3/8 x 230 42 78105 1/2 x295125 1/32x333 45 3953 1/20x333 45 3953 1/16o333 45 3953 3/32x 339 54 4760 1/8 347 65 5775 3/16x355 75 6890 1/4 x370 100 85115 5/16o398135 3/8 x395 130 102150 1/2 x3115 155 135180 3/4 x3199270 1/32 x 450 70 5979 1/20x450 70 5979 1/16u450 70 5979 3/32o 459 90 7398 1/8 x468 100 83115 3/16o478 120 97135 1/4 x495 136 135155 5/16x4162203 3/8 x4145 214 185247 1/2 x4209 270 249290 WINGSKINS 3836 1/2Ox 12479535 1/ito 12479535 3/32x 12579645 MATCHED SHEETS 4248 3/32x4109125 1/8 x4129148 3/16x4144165 1/4 x4155178 SEND $100 FOR COMPLETE CATALOG BALSA STICKS 1/16 50 1/16x 1/4 1/16x3/8 1/16 o 1/2 3/32S0 3/32 xl/4 3/32x3/8 3/32 ol/2 1/8 60 1/8x 1/4 1/8x3/8 1/8ol/2 3/16 SQ 3/16 ol/4 3/16x3/8 3/16 xI/2 3/16x3/4 3/16xl 1/4 SO 1/4x3/8 1/41/2 1/4x3/4 1/411 5/16 SO 3/8 SO 3/8 oI/2 3/8x3/4 3/8xl 1/2SO 1/2x3/4 1/2xl 5/8 SO 3/4 SO TRAILING EDGE 1/8 xl/2 3/16 x3/4 1/4xl 5/16 x 1-1/14 3/8o11/2 1/2x2 1/4x2 1/4x3 3/8x2 3/8x3 1/2o3 3848 10 10 11 15 09 12 13 17 09 1218 1319 1824 1219 1826 1826 2231 2642 3752 1926 2329 2535 3650 4567 2330 3039 3549 4658 5575 4255 5270 6589 5575 7598 36 25 30 35 45 49 79 65 95 79 115 135 BUNDLEIIEAL 36 201/16x 3699 201/16x41035 203/32x 3875 153/32x4999 IS1/8x 3775 10I/8o4775 153/16x3940 103/16o4899 11011/4x3765 101/4x41285 1103/8x3920 53/8x4835 51/2o3605 5 1/2x4IlSO BUNDLEDEALS48 103/32x4950 51/8o4550 5 3/164650 5 1/4s4735 BALSASHEETS UGHT 4-6LB3648 I/32x378119 1/20x378119 1/I6x378119 3/32s393144 1/8 x3114175 3/16x3132202 1/4 x3157237 3/8 x3168307 1/2 x 3236382 3/4 r3375519 1 3532719 1/3214123168 1/20x4123168 1/16x4123168 3/32x4149232 1/8 x4169262 3/16x4197300 1/4 x 4237332 3/8 x 4357563 1/2 x4482668 ALL 4-8 LB WOOD SUBJECT TO AVAILABILITY D rLn onnnl 12 24 48 3/32x 6120225430 3/32x12225430750 1/8x6125245475 1/8x 12245475835 1/4x 6105215345 1/4x 12215345650 3/8o6130240450 3/8x 12240475850 1/2x 6175295490 1/2x 12295495970 SUPERIORUTE 24 48 1/8o6215345 1/8x12345650 LITE PLY12 24 48 1/8x675110175 1/8x12110100350 1/4x695155275 1/412155295550 2mm & 25mm same pdce 1/8 3 PLY BIRCH 122448 l/64x6 125235439 1/64012 235439850 1/32o6 95159299 1/32x 12 180299550 1/16x6 95159299 1/16x 12 180299550 1/8 x6 95159299 1/8 o12 180299550 4 PLY BIRCH 122448 3/16x 6109 215 315 3/16x 12215 345 625 HARD MAPLE 18 1/4x1/440 1/4x3/845 1/4x1/250 3/8x3/845 3/8x1/250 3/8x3/458 3/8x165 HARD MAPLE 3/8xI1/2 98 1/2ol/2 65 I/2x3/4 68 5/8x3/4 75 3/413/4 82 GROOVED LO MOUNTS 12 3/8x3/41/845 3/8 x3/45/3245 1/2x3/43/1650 SPRUCE/BASS3648 1/16ol/42433 3/32xl/42626 1/8SO 25 1/811/4ij2026 1/8x3/82232 1/8xl/23040 1/8o3/44255 3/16S02836 3/16x3/83344 3/16xI/2W4357 3/16x3/4Ns74 1/4603450 1/4x3/84058 1/4xl/2I4565 1/4x3/4P7093 3/860.4969 3/8xl/26077 1/2SO 90 1/3x3/475100 SPRUCE TRIANGLES36 3/8o3/847 1/201/264 3/4o 1/481 BIRCH DOWELS36 1/814 3/1617 1/419 5/1625 3/835 1/4xl/4 3/8x3/8 1/2ol/2 3/4x3/4 1xl 11/2x 1-1/2 2o2 AILERONS36 1/4xl 1/4o11/4 1/411-1/2 1/4x2 5/16x 1-1/4 5/16o 1-1/2 5/16x2 3/8ol-1/4 3/8xl-1/2 3/8o2 1/2oI-l/2 1/2x2 EPOXY 5 Minute 15 Minute 30 Minute 2 Hour 26 Minute INSTANT GLUE 1/2 ox Thin OF 1 oz Thin OF 2ozThinorGF 8 xz Thin OF t/2 oz Extra Thick 1 ox Extra TWicl 2 ox Extra Thick 8 xz Extra Thick QDO8LE8iEQ&EQAM 1/2 ox Thin OF t oz Thin OF 2 ox Thin OF 2 ox Accelerator 10 ox Acc Refltt 3 ox Acc No Freon 10 oz ACC REF No Frexn 1 oz Dehonder 36 25 30 35 49 68 115 195 48 4868 5575 62 87 68 95 6287 6489 7299 6896 7097 79110 80115 90125 4-1/2OZ902 425669 425669 425669 425869 429840 105 300 550 1650 200 338 606 1800 365 665 1200 375 925 315 750 199 INFO & HELP ORDERS ONLY 24 HR FAX SEND MAIL LONE STAR MODELS x TsS ux o 0wxod 100806-745-8394 1-800-687-5555 806-745-6483 ORDERS TO RI 9 Box 437 Lubbock TX 79423 60 Model Aviation EST SELECTION AAA UKADE CONTEST BALSA SATISFACTION GUARANTEED PED 100%
Edition: Model Aviation - 1995/03
Page Numbers: 50, 51, 52, 60
TUCKED AWAY hangars Antique Airplane Association Museum Ottumwa Iowa little 60-year-old biplane jaunty gogo looks belie its age Jack W Rose designed built eleven Rose Parrakeets between 1931 beginning World War II Rose wanted manufacture sell airplanes poured lot money effort getting CAA Approved Type Certificate really fine sporting aircraft nimble outstandingly aerobatic mount stressed nine negative Gs low wing loading nearly symmetrical airfoil could take off land fifty yards Flyaway cost Chicago $1475 $975 less engine mid-1930s Plans Parrakeet made available late 1950s about $100 least example creamy yellow black trim built Richard Borg California stand presence such craft did fall 1993 want very own 50 Model Aviation k Beatty Bjorn Karlstriims three views April 1972 American Aircraft Modeler used prepare working drawings Parrakeet Two additional three-views lengthy photo-spread articles colored centerfolds Sport Flying June 1969 April 1970 Air Progress May 1969 Bob Banka Scale Model Research Foto-Paaks plane #1347 Continental A-40 Engine #436 contributed some measure painting detailing model model attempts follow Karlstrtims drawings depict aircraft its 1936 form However over years surviving Parrakeets have modified ways powerful engines cowlings suit low-pressure donut-type wheels tail wheels navigational light systems have fitted Variations windshields cockpit coamings wing walks etc rife model would probably classified Sport Scale Category because composite markings additional details taken several different planes sources listed above significant change must mentioned Close examination two other three-views dead-on side-view photos several planes indicated noticeably longer noses shown Karlstriims drawings Since easier balance model longer nose opted lengthen nose about inch shorten tail about inch modeler should conduct own research use findings build model suit particular goals Mr Karlstrom s drawings scaled up four times original size build model scale 21/4 inches foot model has 45-inch wingspan 35-inch lengtha nearly ideal size just does shoehorn four-door sedan Wing area 590 square inches weight 69 ounces wing loading 117 ounces per 100 square inches wing area power K&B Green Head 45 RC oldie goodie Roberts three-wire system operates throtfie CONSTRUCTION toughest problem contemplate building biplanes finish/assembly/alignment sequence goal biplane able dope rub down major components separately cement finished parts predrilled locator holes will automatically align wings tail feathers during final assembly construction straightforward sequence construction can important some instances Fuselage Make up two fuselage side frames top other same way did old-time free flight fuselages maximum accuracy frame duplication Cement bulkheads 24 7 place true up assembly establish basic box eveiything hangs add bulkheads 8-13 Bind cabane strut wires bulkheads 2 4 Tack-cement cabane strut alignment templates fuselage longerons between bulkheads 2 4 Slide small washers onto strut end Make up predrilled 3/ x 3/4 x 7 temporary dummy spars Insert four strut ends proper holes guide spars slots templates Center spars cement templates Now diagonal cabane struts can bent up soldered position soft copper wire bindings four washers soldered struts dummy spars meet upper wing center section location will accurately fixed dummy spar/template assembly can now removed Bind cement undercarriage struts position epoxy thread engine mounts suspended Roberts bellcrank leadouts next Note 1/ plywood engine mount gusset has interesting little tab pierces firewall /s diameter dowel cemented through tab really locks assembly together Bolt engine make up throttle throw linkage assembly install sure operates freely before moving Install fuel tank lower wing spar support boxes basswood rigging wire locator blocks various formers fuselage station /16 x 1/g bass stringers 1/4 sheet balsa fairing blocks nose tail /s balsa planking cowling made up one-inch-thick balsa sheet segments glued up shaped hollowed out required various balsa fairings can applied cabane undercarriage struts before assembly set aside Wings Make up laminated bass wingtips obtaining 24-inch length 3/4-inch PVC pipe two end cap fittings Cement end cap onto end pipe fill clear household ammonia Insert four /16 x 1/4 x 14 strips basswood pipe cap off allow soak hour Bind strips /4 plywood form allow dry overnight strips dry cover cement bind once again form allow dry overnight four times eureka four laminated basswood wingtips Ribs quickiy accurately made March 1995 51 Completed framework Rose Parrakeet uses built-up wing spars capstripped ribs help save weight Fuselage progress Power plant original K&B Green Head 45 mounted Ia x I2 maple bearers sandwiching 38 /16 sheet balsa rectangles between two 1/16 sheet aluminum master templates shaving sanding excess wood away Tape leading- tralling-edge timbers wing together four-inch Dremel table saw will accurately cut notches ribs Use balsa shims block up leading trailing edges wing required before cementing ribs notch Measure trim cement laminated tips position concerned small gluing surface junction hardwood-to-balsa joints might fail hard upset opted install /32 sheet balsa web area tip Consider web optional omit such abuse likely occur model under stewardship starboard upper wing web makes good mounting platform outboard wingtip weight Complete top wing center section lower wing center section stubs attention can turned I-beam spars 1/16 x /I6 basswood spar flanges can located cemented appropriate notches still pinned building board Lift assemblies board flip over shim pin down again /16 basswood rectangles will cemented atop spar flange strut location /16 basswood spar stabs will also located time balance spaces will filled 1/16 sheet balsa rectangles purist would have vertical grain Apply top 1/16 X /16 basswood spar flange create light-but-strong Ibeam-type spar Make false ribs cement position 1/16 x 1/ balsa capstrips can now applied both sides ribs false ribs aileron assemblies built-up mated lower wing dead-on accurate fit Drill 1/16 diameter holes strut rigging wire location Plane carve sand wing final shape separate ailerons lower wing Bring spars strut location level capstrips /16 basswood filler pieces set wings aside Tail surfaces 1/16 x /16 laminated basswood tail-surface frames formed using same techniques created wingtips completed assemblies weigh about 11/2 ounces though frames ribs made hardwood Drill frames accept Robart #308 hinges Rudder offset aileron settings will locked position final assembly application Zap cyanoacrylare CyA glue hinges Preliminary fitting Make up two interplane strut templates Slide lower wing spars fuselage spar support boxes Settle upper wing onto cabane struts Position interplane strut templates between wings strut locations Tape assembly together check spacing alignment surfaces satisfied /16 diameter predrilled strut location holes will allow make up 3/M diameter wire interplane strut assemblies Solder brass line guide port strut assembly fit interplane struts balsa fairings important fairing end close fit spar mates assembly can dismantled struts will automatically align top wing during future fittings found struts exactly matched strut drawings template-fitting exercise may unnecessary accurate craftsman Soft copper wire can wrapped soldered strut ends widely spaced coils Enlarge 1/16 diameter predrilled strut locator holes /32 diameter cautious builder might reassemble check fit alignment parts has changed shouldnt forget make up fit diagonal strut braces flexible wire kept splitting soft balsa fairings refit struts basswood fairings solved problem Check alignment tail feathers fin permanently glued fuselage consider advantageous cover finish mask off fuselage striping prior installing stabilizer set aside installed later Covering painting Before covering Continued page 60 52 Model Aviation inental A-40 cylinder details assembly weighs 214 ounces reducing total ballast added nose Ready rolil Author feels Parrakeet has sassy go-go look Original model weighed 69 ounces Type CL Sport Scale Wingspan 45 inches Engine K&B Green Head 45 glow Flying weight 69 ounces Construction Built-up Covering/finish Silk dope Rose ParrakeetlBeatty Continued page 52 model break round off corners hardwood stringers other hardwood members reduce possibility sharp hard corners cutting through covering material during finishing components including struts covered silk Prick pinhole covering predrilled strut rigging wire locator hole will lost under coats paint come Use favorite method finish model used four six coats brushed clear dope followed eight thinned spray filler coats followed eight thin sprayed color coats wet-or-dry sanding thrown two three coats final gloss finish achieved medium grade rubbing compound Take easy sanding rubbing because can easily cut through fabric too hamhanded Give model thorough cleaning soap water trim achieved combination masking tape stencils color scheme markings instrument panel layout derived photos May 1969 Air Progress Final assembly Details like instrument panel windshield leather cockpit padding wing walks should added time Install lower wings cementing spar stubs spar support boxes Coat lower interplane stint ends epoxy mate lower wings Make ajig help locate align rigging wires diagonal strut braces Take two lengths /4 x /2 x 32 spruce drill /32 diameter holes match upper wing strut/rigging locator holes Slide dummy spars position models cabane interplane struts Now rigging wires diagonal strut braces can located epoxied fuselage lower wings correct angles mate upper wing Let dry overnight before removing dummy spars now have fourteen floppy rigging wire strut ends butter epoxy slide proper holes upper winga dicey potentially messy job man pressed son-in-law George grandson Eric service went smoothly six hands Tape assembly check alignment final time allow dry overnight Install stabilizer/elevator unit solder push-rod connection ailerons rudder attached Robart hinges hinges CyAed about 3/ offset rudder ailerons deflected /16 U starboard /16 down port maintain line tension flying Neat scalelike rigging wire fittings can fabricated brass tubing drawings explain installation About left dummy engine cylinders Early realized ballast would required nose Accordingly cylinders purposely made heavy durable materials like plywood metal tubing weighed 41/2 ounces An additional four ounces added models nose have scroll saw can stack saw kind part time will speed things up assure uniformity After unit made up cavity must carved cowl accept cylinders base should have done before cowling palnted hadnt acquired decent documentation draw cylinders time works carefully though its really much problem operation saved last Flying model has good configuration CL flying wheels large widely spaced located well forward good ground handling model has fairly light wing loading ample power has aerobatic potential kept light contestwinning potential detail finish piled scale semisymmetrical alrfoil can provide some stunt capability weight carefully monitored managed Build finish suit own inclinations fly model unless balanced forward center gravity CG location noted drawings Enjoy ASHEETS 3648 I/32x23344 1/16x23344 3/32x24053 I/S x24357 3/16x25065 114 o26079 3/8 x 230 42 78105 1/2 x295125 1/32x333 45 3953 1/20x333 45 3953 1/16o333 45 3953 3/32x 339 54 4760 1/8 347 65 5775 3/16x355 75 6890 1/4 x370 100 85115 5/16o398135 3/8 x395 130 102150 1/2 x3115 155 135180 3/4 x3199270 1/32 x 450 70 5979 1/20x450 70 5979 1/16u450 70 5979 3/32o 459 90 7398 1/8 x468 100 83115 3/16o478 120 97135 1/4 x495 136 135155 5/16x4162203 3/8 x4145 214 185247 1/2 x4209 270 249290 WINGSKINS 3836 1/2Ox 12479535 1/ito 12479535 3/32x 12579645 MATCHED SHEETS 4248 3/32x4109125 1/8 x4129148 3/16x4144165 1/4 x4155178 SEND $100 FOR COMPLETE CATALOG BALSA STICKS 1/16 50 1/16x 1/4 1/16x3/8 1/16 o 1/2 3/32S0 3/32 xl/4 3/32x3/8 3/32 ol/2 1/8 60 1/8x 1/4 1/8x3/8 1/8ol/2 3/16 SQ 3/16 ol/4 3/16x3/8 3/16 xI/2 3/16x3/4 3/16xl 1/4 SO 1/4x3/8 1/41/2 1/4x3/4 1/411 5/16 SO 3/8 SO 3/8 oI/2 3/8x3/4 3/8xl 1/2SO 1/2x3/4 1/2xl 5/8 SO 3/4 SO TRAILING EDGE 1/8 xl/2 3/16 x3/4 1/4xl 5/16 x 1-1/14 3/8o11/2 1/2x2 1/4x2 1/4x3 3/8x2 3/8x3 1/2o3 3848 10 10 11 15 09 12 13 17 09 1218 1319 1824 1219 1826 1826 2231 2642 3752 1926 2329 2535 3650 4567 2330 3039 3549 4658 5575 4255 5270 6589 5575 7598 36 25 30 35 45 49 79 65 95 79 115 135 BUNDLEIIEAL 36 201/16x 3699 201/16x41035 203/32x 3875 153/32x4999 IS1/8x 3775 10I/8o4775 153/16x3940 103/16o4899 11011/4x3765 101/4x41285 1103/8x3920 53/8x4835 51/2o3605 5 1/2x4IlSO BUNDLEDEALS48 103/32x4950 51/8o4550 5 3/164650 5 1/4s4735 BALSASHEETS UGHT 4-6LB3648 I/32x378119 1/20x378119 1/I6x378119 3/32s393144 1/8 x3114175 3/16x3132202 1/4 x3157237 3/8 x3168307 1/2 x 3236382 3/4 r3375519 1 3532719 1/3214123168 1/20x4123168 1/16x4123168 3/32x4149232 1/8 x4169262 3/16x4197300 1/4 x 4237332 3/8 x 4357563 1/2 x4482668 ALL 4-8 LB WOOD SUBJECT TO AVAILABILITY D rLn onnnl 12 24 48 3/32x 6120225430 3/32x12225430750 1/8x6125245475 1/8x 12245475835 1/4x 6105215345 1/4x 12215345650 3/8o6130240450 3/8x 12240475850 1/2x 6175295490 1/2x 12295495970 SUPERIORUTE 24 48 1/8o6215345 1/8x12345650 LITE PLY12 24 48 1/8x675110175 1/8x12110100350 1/4x695155275 1/412155295550 2mm & 25mm same pdce 1/8 3 PLY BIRCH 122448 l/64x6 125235439 1/64012 235439850 1/32o6 95159299 1/32x 12 180299550 1/16x6 95159299 1/16x 12 180299550 1/8 x6 95159299 1/8 o12 180299550 4 PLY BIRCH 122448 3/16x 6109 215 315 3/16x 12215 345 625 HARD MAPLE 18 1/4x1/440 1/4x3/845 1/4x1/250 3/8x3/845 3/8x1/250 3/8x3/458 3/8x165 HARD MAPLE 3/8xI1/2 98 1/2ol/2 65 I/2x3/4 68 5/8x3/4 75 3/413/4 82 GROOVED LO MOUNTS 12 3/8x3/41/845 3/8 x3/45/3245 1/2x3/43/1650 SPRUCE/BASS3648 1/16ol/42433 3/32xl/42626 1/8SO 25 1/811/4ij2026 1/8x3/82232 1/8xl/23040 1/8o3/44255 3/16S02836 3/16x3/83344 3/16xI/2W4357 3/16x3/4Ns74 1/4603450 1/4x3/84058 1/4xl/2I4565 1/4x3/4P7093 3/860.4969 3/8xl/26077 1/2SO 90 1/3x3/475100 SPRUCE TRIANGLES36 3/8o3/847 1/201/264 3/4o 1/481 BIRCH DOWELS36 1/814 3/1617 1/419 5/1625 3/835 1/4xl/4 3/8x3/8 1/2ol/2 3/4x3/4 1xl 11/2x 1-1/2 2o2 AILERONS36 1/4xl 1/4o11/4 1/411-1/2 1/4x2 5/16x 1-1/4 5/16o 1-1/2 5/16x2 3/8ol-1/4 3/8xl-1/2 3/8o2 1/2oI-l/2 1/2x2 EPOXY 5 Minute 15 Minute 30 Minute 2 Hour 26 Minute INSTANT GLUE 1/2 ox Thin OF 1 oz Thin OF 2ozThinorGF 8 xz Thin OF t/2 oz Extra Thick 1 ox Extra TWicl 2 ox Extra Thick 8 xz Extra Thick QDO8LE8iEQ&EQAM 1/2 ox Thin OF t oz Thin OF 2 ox Thin OF 2 ox Accelerator 10 ox Acc Refltt 3 ox Acc No Freon 10 oz ACC REF No Frexn 1 oz Dehonder 36 25 30 35 49 68 115 195 48 4868 5575 62 87 68 95 6287 6489 7299 6896 7097 79110 80115 90125 4-1/2OZ902 425669 425669 425669 425869 429840 105 300 550 1650 200 338 606 1800 365 665 1200 375 925 315 750 199 INFO & HELP ORDERS ONLY 24 HR FAX SEND MAIL LONE STAR MODELS x TsS ux o 0wxod 100806-745-8394 1-800-687-5555 806-745-6483 ORDERS TO RI 9 Box 437 Lubbock TX 79423 60 Model Aviation EST SELECTION AAA UKADE CONTEST BALSA SATISFACTION GUARANTEED PED 100%
Edition: Model Aviation - 1995/03
Page Numbers: 50, 51, 52, 60
TUCKED AWAY hangars Antique Airplane Association Museum Ottumwa Iowa little 60-year-old biplane jaunty gogo looks belie its age Jack W Rose designed built eleven Rose Parrakeets between 1931 beginning World War II Rose wanted manufacture sell airplanes poured lot money effort getting CAA Approved Type Certificate really fine sporting aircraft nimble outstandingly aerobatic mount stressed nine negative Gs low wing loading nearly symmetrical airfoil could take off land fifty yards Flyaway cost Chicago $1475 $975 less engine mid-1930s Plans Parrakeet made available late 1950s about $100 least example creamy yellow black trim built Richard Borg California stand presence such craft did fall 1993 want very own 50 Model Aviation k Beatty Bjorn Karlstriims three views April 1972 American Aircraft Modeler used prepare working drawings Parrakeet Two additional three-views lengthy photo-spread articles colored centerfolds Sport Flying June 1969 April 1970 Air Progress May 1969 Bob Banka Scale Model Research Foto-Paaks plane #1347 Continental A-40 Engine #436 contributed some measure painting detailing model model attempts follow Karlstrtims drawings depict aircraft its 1936 form However over years surviving Parrakeets have modified ways powerful engines cowlings suit low-pressure donut-type wheels tail wheels navigational light systems have fitted Variations windshields cockpit coamings wing walks etc rife model would probably classified Sport Scale Category because composite markings additional details taken several different planes sources listed above significant change must mentioned Close examination two other three-views dead-on side-view photos several planes indicated noticeably longer noses shown Karlstriims drawings Since easier balance model longer nose opted lengthen nose about inch shorten tail about inch modeler should conduct own research use findings build model suit particular goals Mr Karlstrom s drawings scaled up four times original size build model scale 21/4 inches foot model has 45-inch wingspan 35-inch lengtha nearly ideal size just does shoehorn four-door sedan Wing area 590 square inches weight 69 ounces wing loading 117 ounces per 100 square inches wing area power K&B Green Head 45 RC oldie goodie Roberts three-wire system operates throtfie CONSTRUCTION toughest problem contemplate building biplanes finish/assembly/alignment sequence goal biplane able dope rub down major components separately cement finished parts predrilled locator holes will automatically align wings tail feathers during final assembly construction straightforward sequence construction can important some instances Fuselage Make up two fuselage side frames top other same way did old-time free flight fuselages maximum accuracy frame duplication Cement bulkheads 24 7 place true up assembly establish basic box eveiything hangs add bulkheads 8-13 Bind cabane strut wires bulkheads 2 4 Tack-cement cabane strut alignment templates fuselage longerons between bulkheads 2 4 Slide small washers onto strut end Make up predrilled 3/ x 3/4 x 7 temporary dummy spars Insert four strut ends proper holes guide spars slots templates Center spars cement templates Now diagonal cabane struts can bent up soldered position soft copper wire bindings four washers soldered struts dummy spars meet upper wing center section location will accurately fixed dummy spar/template assembly can now removed Bind cement undercarriage struts position epoxy thread engine mounts suspended Roberts bellcrank leadouts next Note 1/ plywood engine mount gusset has interesting little tab pierces firewall /s diameter dowel cemented through tab really locks assembly together Bolt engine make up throttle throw linkage assembly install sure operates freely before moving Install fuel tank lower wing spar support boxes basswood rigging wire locator blocks various formers fuselage station /16 x 1/g bass stringers 1/4 sheet balsa fairing blocks nose tail /s balsa planking cowling made up one-inch-thick balsa sheet segments glued up shaped hollowed out required various balsa fairings can applied cabane undercarriage struts before assembly set aside Wings Make up laminated bass wingtips obtaining 24-inch length 3/4-inch PVC pipe two end cap fittings Cement end cap onto end pipe fill clear household ammonia Insert four /16 x 1/4 x 14 strips basswood pipe cap off allow soak hour Bind strips /4 plywood form allow dry overnight strips dry cover cement bind once again form allow dry overnight four times eureka four laminated basswood wingtips Ribs quickiy accurately made March 1995 51 Completed framework Rose Parrakeet uses built-up wing spars capstripped ribs help save weight Fuselage progress Power plant original K&B Green Head 45 mounted Ia x I2 maple bearers sandwiching 38 /16 sheet balsa rectangles between two 1/16 sheet aluminum master templates shaving sanding excess wood away Tape leading- tralling-edge timbers wing together four-inch Dremel table saw will accurately cut notches ribs Use balsa shims block up leading trailing edges wing required before cementing ribs notch Measure trim cement laminated tips position concerned small gluing surface junction hardwood-to-balsa joints might fail hard upset opted install /32 sheet balsa web area tip Consider web optional omit such abuse likely occur model under stewardship starboard upper wing web makes good mounting platform outboard wingtip weight Complete top wing center section lower wing center section stubs attention can turned I-beam spars 1/16 x /I6 basswood spar flanges can located cemented appropriate notches still pinned building board Lift assemblies board flip over shim pin down again /16 basswood rectangles will cemented atop spar flange strut location /16 basswood spar stabs will also located time balance spaces will filled 1/16 sheet balsa rectangles purist would have vertical grain Apply top 1/16 X /16 basswood spar flange create light-but-strong Ibeam-type spar Make false ribs cement position 1/16 x 1/ balsa capstrips can now applied both sides ribs false ribs aileron assemblies built-up mated lower wing dead-on accurate fit Drill 1/16 diameter holes strut rigging wire location Plane carve sand wing final shape separate ailerons lower wing Bring spars strut location level capstrips /16 basswood filler pieces set wings aside Tail surfaces 1/16 x /16 laminated basswood tail-surface frames formed using same techniques created wingtips completed assemblies weigh about 11/2 ounces though frames ribs made hardwood Drill frames accept Robart #308 hinges Rudder offset aileron settings will locked position final assembly application Zap cyanoacrylare CyA glue hinges Preliminary fitting Make up two interplane strut templates Slide lower wing spars fuselage spar support boxes Settle upper wing onto cabane struts Position interplane strut templates between wings strut locations Tape assembly together check spacing alignment surfaces satisfied /16 diameter predrilled strut location holes will allow make up 3/M diameter wire interplane strut assemblies Solder brass line guide port strut assembly fit interplane struts balsa fairings important fairing end close fit spar mates assembly can dismantled struts will automatically align top wing during future fittings found struts exactly matched strut drawings template-fitting exercise may unnecessary accurate craftsman Soft copper wire can wrapped soldered strut ends widely spaced coils Enlarge 1/16 diameter predrilled strut locator holes /32 diameter cautious builder might reassemble check fit alignment parts has changed shouldnt forget make up fit diagonal strut braces flexible wire kept splitting soft balsa fairings refit struts basswood fairings solved problem Check alignment tail feathers fin permanently glued fuselage consider advantageous cover finish mask off fuselage striping prior installing stabilizer set aside installed later Covering painting Before covering Continued page 60 52 Model Aviation inental A-40 cylinder details assembly weighs 214 ounces reducing total ballast added nose Ready rolil Author feels Parrakeet has sassy go-go look Original model weighed 69 ounces Type CL Sport Scale Wingspan 45 inches Engine K&B Green Head 45 glow Flying weight 69 ounces Construction Built-up Covering/finish Silk dope Rose ParrakeetlBeatty Continued page 52 model break round off corners hardwood stringers other hardwood members reduce possibility sharp hard corners cutting through covering material during finishing components including struts covered silk Prick pinhole covering predrilled strut rigging wire locator hole will lost under coats paint come Use favorite method finish model used four six coats brushed clear dope followed eight thinned spray filler coats followed eight thin sprayed color coats wet-or-dry sanding thrown two three coats final gloss finish achieved medium grade rubbing compound Take easy sanding rubbing because can easily cut through fabric too hamhanded Give model thorough cleaning soap water trim achieved combination masking tape stencils color scheme markings instrument panel layout derived photos May 1969 Air Progress Final assembly Details like instrument panel windshield leather cockpit padding wing walks should added time Install lower wings cementing spar stubs spar support boxes Coat lower interplane stint ends epoxy mate lower wings Make ajig help locate align rigging wires diagonal strut braces Take two lengths /4 x /2 x 32 spruce drill /32 diameter holes match upper wing strut/rigging locator holes Slide dummy spars position models cabane interplane struts Now rigging wires diagonal strut braces can located epoxied fuselage lower wings correct angles mate upper wing Let dry overnight before removing dummy spars now have fourteen floppy rigging wire strut ends butter epoxy slide proper holes upper winga dicey potentially messy job man pressed son-in-law George grandson Eric service went smoothly six hands Tape assembly check alignment final time allow dry overnight Install stabilizer/elevator unit solder push-rod connection ailerons rudder attached Robart hinges hinges CyAed about 3/ offset rudder ailerons deflected /16 U starboard /16 down port maintain line tension flying Neat scalelike rigging wire fittings can fabricated brass tubing drawings explain installation About left dummy engine cylinders Early realized ballast would required nose Accordingly cylinders purposely made heavy durable materials like plywood metal tubing weighed 41/2 ounces An additional four ounces added models nose have scroll saw can stack saw kind part time will speed things up assure uniformity After unit made up cavity must carved cowl accept cylinders base should have done before cowling palnted hadnt acquired decent documentation draw cylinders time works carefully though its really much problem operation saved last Flying model has good configuration CL flying wheels large widely spaced located well forward good ground handling model has fairly light wing loading ample power has aerobatic potential kept light contestwinning potential detail finish piled scale semisymmetrical alrfoil can provide some stunt capability weight carefully monitored managed Build finish suit own inclinations fly model unless balanced forward center gravity CG location noted drawings Enjoy ASHEETS 3648 I/32x23344 1/16x23344 3/32x24053 I/S x24357 3/16x25065 114 o26079 3/8 x 230 42 78105 1/2 x295125 1/32x333 45 3953 1/20x333 45 3953 1/16o333 45 3953 3/32x 339 54 4760 1/8 347 65 5775 3/16x355 75 6890 1/4 x370 100 85115 5/16o398135 3/8 x395 130 102150 1/2 x3115 155 135180 3/4 x3199270 1/32 x 450 70 5979 1/20x450 70 5979 1/16u450 70 5979 3/32o 459 90 7398 1/8 x468 100 83115 3/16o478 120 97135 1/4 x495 136 135155 5/16x4162203 3/8 x4145 214 185247 1/2 x4209 270 249290 WINGSKINS 3836 1/2Ox 12479535 1/ito 12479535 3/32x 12579645 MATCHED SHEETS 4248 3/32x4109125 1/8 x4129148 3/16x4144165 1/4 x4155178 SEND $100 FOR COMPLETE CATALOG BALSA STICKS 1/16 50 1/16x 1/4 1/16x3/8 1/16 o 1/2 3/32S0 3/32 xl/4 3/32x3/8 3/32 ol/2 1/8 60 1/8x 1/4 1/8x3/8 1/8ol/2 3/16 SQ 3/16 ol/4 3/16x3/8 3/16 xI/2 3/16x3/4 3/16xl 1/4 SO 1/4x3/8 1/41/2 1/4x3/4 1/411 5/16 SO 3/8 SO 3/8 oI/2 3/8x3/4 3/8xl 1/2SO 1/2x3/4 1/2xl 5/8 SO 3/4 SO TRAILING EDGE 1/8 xl/2 3/16 x3/4 1/4xl 5/16 x 1-1/14 3/8o11/2 1/2x2 1/4x2 1/4x3 3/8x2 3/8x3 1/2o3 3848 10 10 11 15 09 12 13 17 09 1218 1319 1824 1219 1826 1826 2231 2642 3752 1926 2329 2535 3650 4567 2330 3039 3549 4658 5575 4255 5270 6589 5575 7598 36 25 30 35 45 49 79 65 95 79 115 135 BUNDLEIIEAL 36 201/16x 3699 201/16x41035 203/32x 3875 153/32x4999 IS1/8x 3775 10I/8o4775 153/16x3940 103/16o4899 11011/4x3765 101/4x41285 1103/8x3920 53/8x4835 51/2o3605 5 1/2x4IlSO BUNDLEDEALS48 103/32x4950 51/8o4550 5 3/164650 5 1/4s4735 BALSASHEETS UGHT 4-6LB3648 I/32x378119 1/20x378119 1/I6x378119 3/32s393144 1/8 x3114175 3/16x3132202 1/4 x3157237 3/8 x3168307 1/2 x 3236382 3/4 r3375519 1 3532719 1/3214123168 1/20x4123168 1/16x4123168 3/32x4149232 1/8 x4169262 3/16x4197300 1/4 x 4237332 3/8 x 4357563 1/2 x4482668 ALL 4-8 LB WOOD SUBJECT TO AVAILABILITY D rLn onnnl 12 24 48 3/32x 6120225430 3/32x12225430750 1/8x6125245475 1/8x 12245475835 1/4x 6105215345 1/4x 12215345650 3/8o6130240450 3/8x 12240475850 1/2x 6175295490 1/2x 12295495970 SUPERIORUTE 24 48 1/8o6215345 1/8x12345650 LITE PLY12 24 48 1/8x675110175 1/8x12110100350 1/4x695155275 1/412155295550 2mm & 25mm same pdce 1/8 3 PLY BIRCH 122448 l/64x6 125235439 1/64012 235439850 1/32o6 95159299 1/32x 12 180299550 1/16x6 95159299 1/16x 12 180299550 1/8 x6 95159299 1/8 o12 180299550 4 PLY BIRCH 122448 3/16x 6109 215 315 3/16x 12215 345 625 HARD MAPLE 18 1/4x1/440 1/4x3/845 1/4x1/250 3/8x3/845 3/8x1/250 3/8x3/458 3/8x165 HARD MAPLE 3/8xI1/2 98 1/2ol/2 65 I/2x3/4 68 5/8x3/4 75 3/413/4 82 GROOVED LO MOUNTS 12 3/8x3/41/845 3/8 x3/45/3245 1/2x3/43/1650 SPRUCE/BASS3648 1/16ol/42433 3/32xl/42626 1/8SO 25 1/811/4ij2026 1/8x3/82232 1/8xl/23040 1/8o3/44255 3/16S02836 3/16x3/83344 3/16xI/2W4357 3/16x3/4Ns74 1/4603450 1/4x3/84058 1/4xl/2I4565 1/4x3/4P7093 3/860.4969 3/8xl/26077 1/2SO 90 1/3x3/475100 SPRUCE TRIANGLES36 3/8o3/847 1/201/264 3/4o 1/481 BIRCH DOWELS36 1/814 3/1617 1/419 5/1625 3/835 1/4xl/4 3/8x3/8 1/2ol/2 3/4x3/4 1xl 11/2x 1-1/2 2o2 AILERONS36 1/4xl 1/4o11/4 1/411-1/2 1/4x2 5/16x 1-1/4 5/16o 1-1/2 5/16x2 3/8ol-1/4 3/8xl-1/2 3/8o2 1/2oI-l/2 1/2x2 EPOXY 5 Minute 15 Minute 30 Minute 2 Hour 26 Minute INSTANT GLUE 1/2 ox Thin OF 1 oz Thin OF 2ozThinorGF 8 xz Thin OF t/2 oz Extra Thick 1 ox Extra TWicl 2 ox Extra Thick 8 xz Extra Thick QDO8LE8iEQ&EQAM 1/2 ox Thin OF t oz Thin OF 2 ox Thin OF 2 ox Accelerator 10 ox Acc Refltt 3 ox Acc No Freon 10 oz ACC REF No Frexn 1 oz Dehonder 36 25 30 35 49 68 115 195 48 4868 5575 62 87 68 95 6287 6489 7299 6896 7097 79110 80115 90125 4-1/2OZ902 425669 425669 425669 425869 429840 105 300 550 1650 200 338 606 1800 365 665 1200 375 925 315 750 199 INFO & HELP ORDERS ONLY 24 HR FAX SEND MAIL LONE STAR MODELS x TsS ux o 0wxod 100806-745-8394 1-800-687-5555 806-745-6483 ORDERS TO RI 9 Box 437 Lubbock TX 79423 60 Model Aviation EST SELECTION AAA UKADE CONTEST BALSA SATISFACTION GUARANTEED PED 100%
